Archive for the ‘Bone Marrow Stem Cells’ Category

CONTRIBUTED PHOTO Former Zumba instructor Cristina Rodriguez leads a flash mob at La Palmera mall in December 2010, a month before she stopped teaching because she developed a pain in her hip. She later was diagnosed with non-Hodgkin lymphoma. Rodriguez is trying to raise awareness about the importance, especially among Hispanics, of donating bone marrow.

Photo by Rachel Denny Clow, Corpus Christi Caller-Times

Rachel Denny Clow/Caller-Times Cristina Rodriguez sits with her dogs Coby (left) and Flower at her home Thursday. Rodriguez, who has non-Hodgkin lymphoma, is having a Zumba benefit on Sunday and inviting people to register to donate bone marrow. Rodriguez is a former Zumba instructor.

Photo by Rachel Denny Clow, Corpus Christi Caller-Times

Rachel Denny Clow/Caller-Times Cristina Rodriguez sits with her dogs Coby (left) and Flower at her home Thursday.

CORPUS CHRISTI Had Cristina Rodriguez's cancer been more aggressive, had it penetrated her bones, things might have been different.

And while she has had chemotherapy, she has lost her hair and needs a stem cell treatment, but she doesn't need a bone-marrow transplant.

And for that, she's lucky.

Hispanics needing bone marrow have a harder time finding matching donors than do other ethnicities because few Hispanics have registered to donate.

"That could've easily been me," Rodriguez said.

Go here to see the original:
Former Zumba instructor with cancer encourages Hispanics to donate bone marrow

On a special surface that could help advance stem cell therapies, UM researchers have turned human skin cells into adult-derived stem cells, coaxed them into bone cells and then transplanted them into holes in the skulls of mice. The cells produced four times as much new bone growth as in the mice without the extra bone cells. In this pink-stained image, the black outline partially encloses the new bone growth in the skull. Image credit: Villa-Diaz, L.G., Brown, S.E., Liu, Y. Ross, A.M., Lahann, J.M., Krebsbach, P.H., University of Michigan

ANN ARBOR University of Michigan researchers have proven that a special surface, free of biological contaminants, allows adult-derived stem cells to thrive and transform into multiple cell types. Their success brings stem cell therapies another step closer.

To prove the cells regenerative powers, bone cells grown on this surface were then transplanted into holes in the skulls of mice, producing four times as much new bone growth as in the mice without the extra bone cells.

An embryos cells really can be anything they want to be when they grow up: organs, nerves, skin, bone, any type of human cell. Adult-derived induced stem cells can do this and better. Because the source cells can come from the patient, they are perfectly compatible for medical treatments.

In order to make them, Paul Krebsbach, professor of biological and materials sciences at the UM School of Dentistry, said, We turn back the clock, in a way. Were taking a specialized adult cell and genetically reprogramming it, so it behaves like a more primitive cell.

Specifically, they turn human skin cells into stem cells. Less than five years after the discovery of this method, researchers still dont know precisely how it works, but the process involves adding proteins that can turn genes on and off to the adult cells.

Before stem cells can be used to make repairs in the body, they must be grown and directed into becoming the desired cell type. Researchers typically use surfaces of animal cells and proteins for stem cell habitats, but these gels are expensive to make, and batches vary depending on the individual animal.

You dont really know whats in there, said Joerg Lahann associate professor of chemical engineering and biomedical engineering.

For example, he said that human cells are often grown over mouse cells, but they can go a little native, beginning to produce some mouse proteins that may invite an attack by a patients immune system.

The polymer gel created by Lahann and his colleagues in 2010 avoids these problems because researchers are able to control all of the gels ingredients and how they combine.

Read the original post:
UM: Stem-Cell-Growing Surface Enables Bone Repair

A growth factor isolated from human stem cells shows promising results in a mouse model of multiple sclerosis.

Human mesenchymal stem cells (hMSCs) have become a popular potential therapy for numerous autoimmune and neurological disorders. But while these bone marrow-derived stem cells have been studied in great detail in the dish, scientists know little about how they modulate the immune system and promote tissue repair in living organisms.

Now, one research team has uncovered a molecular mechanism by which hMSCs promote recovery in a mouse model of multiple sclerosis (MS).

According to research, published online Sunday (May 20) in Nature Neuroscience, a growth factor produced by hMSCs fights MS in two ways: blocking a destructive autoimmune response and repairing neuronal damage. The finding could help advance ongoing clinical trials testing hMSCs as a therapy for MS.

The researchers have identified a unique factor that has surprisingly potent activity mediating neuron repair, said Jacques Galipeau, a cell therapy researcher at Emory University in Atlanta, Georgia, who was not involved in the research. The magnitude of the effect on a mouse model of MS is a big deal.

MS is an autoimmune disease in which the immune system attacks myelin sheaths that surround and protect nerve cells. The attack leaves nerves exposed and unable to send signals to the brain and back, resulting in the loss of motor skills, coordination, vision, and cognitive abilities. There is no cure for MS, and most current therapies work to simply suppress the immune system, preventing further neuronal damage. None have demonstrated an ability to also repair damaged myelin and promote recovery.

In 2009, Robert Miller and colleagues at Case Western Reserve University in Cleveland, Ohio, demonstrated that hMSCs dramatically reversed the symptoms of multiple sclerosis in a mouse model of the disorder. The animals got better, recalled Miller. The team hypothesized that the stem cells suppress the immune response and promote remyelination.

But Miller wanted to know exactly what the cells were doing. To find out, his team isolated the medium on which the hMSCs were grown to determine if the cells or something they secreted was responsible for the observed recovery. The medium alone was enough to induce recovery in mice, pointing to the latter.

To find out exactly which molecule or molecules in the medium were responsible, the researchers separated the proteins in the fluid based on the molecular weight and injected each isolate into mice exhibiting symptoms of MS. The mid-weight solution, of proteins with masses between 50 and 100 kilodaltons (kDa), caused recovery. That eliminated a huge number of potential candidates, said Miller.

The researchers then narrowed the field again with a literature search for a molecule that fit their criteria: secreted by hMSCs, 50-100 kDa in size, and involved in tissue repair. They identified hepatocyte growth factor (HGF), a cytokine made by mesenchymal cells that has been shown to promote tissue regeneration and cell survival in numerous experiments. Sure enough, HGF alone was enough to promote recovery in the MS mouse models, and blocking the receptor for HGF in those mice blocked recovery. The team also demonstrated that HGF suppresses immune responses in vivo and accelerates remyelination of neurons in vitro. Finally, they saw that HGF causes remyelination in rats with a lesion on their spinal cord.

See the article here:
Could Stem Cells Cure MS?

Editor's Choice Main Category: Multiple Sclerosis Article Date: 24 May 2012 - 14:00 PDT

Current ratings for: 'Recovery From Multiple Sclerosis By Growth Factor In Stem Cells'

4.4 (5 votes)

4.5 (2 votes)

Animals that were injected with hepatocyte growth factor were noted to have grown new neural cells and lower levels of inflammation. Most significantly, the researchers noted that the protective envelope of myelin, the myelin sheath, which surrounds the core of a nerve fiber and facilitates the transmission of nerve impulses, re-grew and covered lesions that were caused by MS.

Robert H. Miller, professor of neurosciences at the School of Medicine and vice president for research at Case Western Reserve University declared: "The importance of this work is we think we've identified the driver of the recovery."

MS is caused by damage to the myelin sheath, the protective covering that surrounds nerve cells. The nerve damage is caused by inflammation, which occurs when the body's own immune cells attacks the nervous systems located in areas of the brain, the optic nerve, and spinal cord. This damage can cause an interruption of the nerve signals, which results in loss of balance and coordination, cognitive ability, as well as in other functions and in time, these intermittent losses may become permanent. In 2009, Caplan and Miller discovered that mice with MS injected with human mesenchymal stem cells recovered from the type of damage that was brought on by MS. A clinical trial is currently underway based on their research, whereby patients with MS are injected with their own stems cells.

During this trial, the team decided to first establish whether the presence of stem cells or other cells induce recovery. They injected a total of 11 animals with MS with the medium, in which mesenchymal stem cells that were taken from bone marrow grew, discovering that all animals displayed a rapid reduction in functional deficits. An analysis demonstrated that unless the injected molecules had a certain size or weight, i.e. between 50 and 100 kiloDaltons, the course of the disease remained unchanged.

Other research, as well as the team's own studies, suggested that this was likely to be instigated by the hepatocyte growth factor, which is secreted by mesenchymal stem cells.

The team then injected the animals with either 50 or 100 nanograms of the growth factor on alternate days for a 5-day period and observed a decrease in the level of signaling molecules that promote inflammation, whilst the level of signaling molecules that oppose inflammation increased. The researchers noted a growth of neural cells, whilst nerves that were exposed because of MS were rewrapped with myelin. Recovery was marginally better in those mice that received the 100-nanogram injections compared with those receiving the 50-nanogram injections.

The rest is here:
Recovery From Multiple Sclerosis By Growth Factor In Stem Cells

May 24, 2012

Connie K. Ho for RedOrbit.com

Technology is rapidly progressing and so is research related to stem cells.

Researchers from the University of Michigan recently announced that they found a special surface without biological contaminants that can help adult-derived stem cells to grow and change into different cell types. The findings, published in the journal Stem Cells, are considered a breakthrough in stem cell research.

In the study, scientists grew bone cells on the surface and then transplanted the cells to the skulls of mice to look at the cells regenerative powers. The results showed that the cells produced four times as much new bone growth in mice without the help of extra bone cells. The importance of these adult-derived induced stem cells is that they come from the patient and these cells are compatible for medical treatments.

We turn back the clock, in a way. Were taking a specialized adult cell and genetically reprogramming it, so it behaves like a more primitive cell, commented Paul Krebsbach, professor of biological and materials sciences at the U-M School of Dentistry, on the process of stem cell creation.

In the project, researchers examined how human skin cells are turned into stem cells and, even though they are not exactly sure as to how the process works, how it involves the addition of proteins that can signal the genes to turn on and off to the adult cells. Prior to being used to repair parts of the body, the stem cells are grown and directed to become a specific cell type. Researchers were able to use the surface of the animal cells and proteins for stem cell habitats, but saw that the amount of cells produced could vary by animal.

You dont really know whats in there, noted Joerg Lahann, associate professor of chemical engineering and biomedical engineering.

One difficulty researchers have encountered in the past is the fact that human cells and animals cells can sometimes mix. However, the polymer gel made by Lahann and his fellow researchers helped avoid this problem. Researchers were able to gain better control over the gels ingredients and how they were combined.

Its basically the ease of a plastic dish, Lahann said. There is no biological contamination that could potentially influence your human stem cells.

Excerpt from:
Bone Repair Via Stem-cell-growing Surface

On a special surface that could help advance stem cell therapies, UM researchers have turned human skin cells into adult-derived stem cells, coaxed them into bone cells and then transplanted them into holes in the skulls of mice. The cells produced four times as much new bone growth as in the mice without the extra bone cells. In this pink-stained image, the black outline partially encloses the new bone growth in the skull. Image credit: Villa-Diaz, L.G., Brown, S.E., Liu, Y. Ross, A.M., Lahann, J.M., Krebsbach, P.H., University of Michigan

ANN ARBOR University of Michigan researchers have proven that a special surface, free of biological contaminants, allows adult-derived stem cells to thrive and transform into multiple cell types. Their success brings stem cell therapies another step closer.

To prove the cells regenerative powers, bone cells grown on this surface were then transplanted into holes in the skulls of mice, producing four times as much new bone growth as in the mice without the extra bone cells.

An embryos cells really can be anything they want to be when they grow up: organs, nerves, skin, bone, any type of human cell. Adult-derived induced stem cells can do this and better. Because the source cells can come from the patient, they are perfectly compatible for medical treatments.

In order to make them, Paul Krebsbach, professor of biological and materials sciences at the UM School of Dentistry, said, We turn back the clock, in a way. Were taking a specialized adult cell and genetically reprogramming it, so it behaves like a more primitive cell.

Specifically, they turn human skin cells into stem cells. Less than five years after the discovery of this method, researchers still dont know precisely how it works, but the process involves adding proteins that can turn genes on and off to the adult cells.

Before stem cells can be used to make repairs in the body, they must be grown and directed into becoming the desired cell type. Researchers typically use surfaces of animal cells and proteins for stem cell habitats, but these gels are expensive to make, and batches vary depending on the individual animal.

You dont really know whats in there, said Joerg Lahann associate professor of chemical engineering and biomedical engineering.

For example, he said that human cells are often grown over mouse cells, but they can go a little native, beginning to produce some mouse proteins that may invite an attack by a patients immune system.

The polymer gel created by Lahann and his colleagues in 2010 avoids these problems because researchers are able to control all of the gels ingredients and how they combine.

Excerpt from:
UM: Stem-Cell-Growing Surface Enables Bone Repair

A growth factor isolated from human stem cells shows promising results in a mouse model of multiple sclerosis.

Human mesenchymal stem cells (hMSCs) have become a popular potential therapy for numerous autoimmune and neurological disorders. But while these bone marrow-derived stem cells have been studied in great detail in the dish, scientists know little about how they modulate the immune system and promote tissue repair in living organisms.

Now, one research team has uncovered a molecular mechanism by which hMSCs promote recovery in a mouse model of multiple sclerosis (MS).

According to research, published online Sunday (May 20) in Nature Neuroscience, a growth factor produced by hMSCs fights MS in two ways: blocking a destructive autoimmune response and repairing neuronal damage. The finding could help advance ongoing clinical trials testing hMSCs as a therapy for MS.

The researchers have identified a unique factor that has surprisingly potent activity mediating neuron repair, said Jacques Galipeau, a cell therapy researcher at Emory University in Atlanta, Georgia, who was not involved in the research. The magnitude of the effect on a mouse model of MS is a big deal.

MS is an autoimmune disease in which the immune system attacks myelin sheaths that surround and protect nerve cells. The attack leaves nerves exposed and unable to send signals to the brain and back, resulting in the loss of motor skills, coordination, vision, and cognitive abilities. There is no cure for MS, and most current therapies work to simply suppress the immune system, preventing further neuronal damage. None have demonstrated an ability to also repair damaged myelin and promote recovery.

In 2009, Robert Miller and colleagues at Case Western Reserve University in Cleveland, Ohio, demonstrated that hMSCs dramatically reversed the symptoms of multiple sclerosis in a mouse model of the disorder. The animals got better, recalled Miller. The team hypothesized that the stem cells suppress the immune response and promote remyelination.

But Miller wanted to know exactly what the cells were doing. To find out, his team isolated the medium on which the hMSCs were grown to determine if the cells or something they secreted was responsible for the observed recovery. The medium alone was enough to induce recovery in mice, pointing to the latter.

To find out exactly which molecule or molecules in the medium were responsible, the researchers separated the proteins in the fluid based on the molecular weight and injected each isolate into mice exhibiting symptoms of MS. The mid-weight solution, of proteins with masses between 50 and 100 kilodaltons (kDa), caused recovery. That eliminated a huge number of potential candidates, said Miller.

The researchers then narrowed the field again with a literature search for a molecule that fit their criteria: secreted by hMSCs, 50-100 kDa in size, and involved in tissue repair. They identified hepatocyte growth factor (HGF), a cytokine made by mesenchymal cells that has been shown to promote tissue regeneration and cell survival in numerous experiments. Sure enough, HGF alone was enough to promote recovery in the MS mouse models, and blocking the receptor for HGF in those mice blocked recovery. The team also demonstrated that HGF suppresses immune responses in vivo and accelerates remyelination of neurons in vitro. Finally, they saw that HGF causes remyelination in rats with a lesion on their spinal cord.

Go here to read the rest:
Could Stem Cells Cure MS?

Editor's Choice Main Category: Multiple Sclerosis Article Date: 24 May 2012 - 14:00 PDT

Current ratings for: 'Recovery From Multiple Sclerosis By Growth Factor In Stem Cells'

5 (2 votes)

4.5 (2 votes)

Animals that were injected with hepatocyte growth factor were noted to have grown new neural cells and lower levels of inflammation. Most significantly, the researchers noted that the protective envelope of myelin, the myelin sheath, which surrounds the core of a nerve fiber and facilitates the transmission of nerve impulses, re-grew and covered lesions that were caused by MS.

Robert H. Miller, professor of neurosciences at the School of Medicine and vice president for research at Case Western Reserve University declared: "The importance of this work is we think we've identified the driver of the recovery."

MS is caused by damage to the myelin sheath, the protective covering that surrounds nerve cells. The nerve damage is caused by inflammation, which occurs when the body's own immune cells attacks the nervous systems located in areas of the brain, the optic nerve, and spinal cord. This damage can cause an interruption of the nerve signals, which results in loss of balance and coordination, cognitive ability, as well as in other functions and in time, these intermittent losses may become permanent. In 2009, Caplan and Miller discovered that mice with MS injected with human mesenchymal stem cells recovered from the type of damage that was brought on by MS. A clinical trial is currently underway based on their research, whereby patients with MS are injected with their own stems cells.

During this trial, the team decided to first establish whether the presence of stem cells or other cells induce recovery. They injected a total of 11 animals with MS with the medium, in which mesenchymal stem cells that were taken from bone marrow grew, discovering that all animals displayed a rapid reduction in functional deficits. An analysis demonstrated that unless the injected molecules had a certain size or weight, i.e. between 50 and 100 kiloDaltons, the course of the disease remained unchanged.

Other research, as well as the team's own studies, suggested that this was likely to be instigated by the hepatocyte growth factor, which is secreted by mesenchymal stem cells.

The team then injected the animals with either 50 or 100 nanograms of the growth factor on alternate days for a 5-day period and observed a decrease in the level of signaling molecules that promote inflammation, whilst the level of signaling molecules that oppose inflammation increased. The researchers noted a growth of neural cells, whilst nerves that were exposed because of MS were rewrapped with myelin. Recovery was marginally better in those mice that received the 100-nanogram injections compared with those receiving the 50-nanogram injections.

See more here:
Recovery From Multiple Sclerosis By Growth Factor In Stem Cells

May 24, 2012

Connie K. Ho for RedOrbit.com

Technology is rapidly progressing and so is research related to stem cells.

Researchers from the University of Michigan recently announced that they found a special surface without biological contaminants that can help adult-derived stem cells to grow and change into different cell types. The findings, published in the journal Stem Cells, are considered a breakthrough in stem cell research.

In the study, scientists grew bone cells on the surface and then transplanted the cells to the skulls of mice to look at the cells regenerative powers. The results showed that the cells produced four times as much new bone growth in mice without the help of extra bone cells. The importance of these adult-derived induced stem cells is that they come from the patient and these cells are compatible for medical treatments.

We turn back the clock, in a way. Were taking a specialized adult cell and genetically reprogramming it, so it behaves like a more primitive cell, commented Paul Krebsbach, professor of biological and materials sciences at the U-M School of Dentistry, on the process of stem cell creation.

In the project, researchers examined how human skin cells are turned into stem cells and, even though they are not exactly sure as to how the process works, how it involves the addition of proteins that can signal the genes to turn on and off to the adult cells. Prior to being used to repair parts of the body, the stem cells are grown and directed to become a specific cell type. Researchers were able to use the surface of the animal cells and proteins for stem cell habitats, but saw that the amount of cells produced could vary by animal.

You dont really know whats in there, noted Joerg Lahann, associate professor of chemical engineering and biomedical engineering.

One difficulty researchers have encountered in the past is the fact that human cells and animals cells can sometimes mix. However, the polymer gel made by Lahann and his fellow researchers helped avoid this problem. Researchers were able to gain better control over the gels ingredients and how they were combined.

Its basically the ease of a plastic dish, Lahann said. There is no biological contamination that could potentially influence your human stem cells.

Continued here:
Bone Repair Via Stem-cell-growing Surface

ScienceDaily (May 21, 2012) A substance in human mesenchymal stem cells that promotes growth appears to spur restoration of nerves and their function in rodent models of multiple sclerosis (MS), researchers at Case Western Reserve University School of Medicine have found.

In animals injected with hepatocyte growth factor, inflammation declined and neural cells grew. Perhaps most important, the myelin sheath, which protects nerves and their ability to gather and send information, regrew, covering lesions caused by the disease.

"The importance of this work is we think we've identified the driver of the recovery," said Robert H. Miller, professor of neurosciences at the School of Medicine and vice president for research at Case Western Reserve University.

Miller, neurosciences instructor Lianhua Bai and biology professor Arnold I. Caplan, designed the study. They worked with Project Manager Anne DeChant, and research assistants Jordan Hecker, Janet Kranso and Anita Zaremba, from the School of Medicine; and Donald P. Lennon, a research assistant from the university's Skeletal Research Center.

In MS, the immune system attacks myelin, risking injury to exposed nerves' intricate wiring. When damaged, nerve signals can be interrupted, causing loss of balance and coordination, cognitive ability and other functions. Over time, intermittent losses may become permanent.

Miller and Caplan reported in 2009 that when they injected human mesenchymal stem cells into rodent models of MS, the animals recovered from the damage wrought by the disease. Based on their work, a clinical trial is underway in which MS patients are injected with their own stem cells.

In this study, the researchers first wanted to test whether the presence of stem cells or something cells produce promotes recovery. They injected mice with the medium in which mesenchymal stem cells, culled from bone marrow, grew.

All 11 animals, which have a version of MS, showed a rapid reduction in functional deficits.

Analysis showed that the disease remained on course unless the molecules injected were of a certain size; that is, the molecular weight ranged between 50 and 100 kiloDaltons. Research by others and results of their own work indicated hepatocyte growth factor, which is secreted by mesenchymal stem cells, was a likely instigator.

The scientists injected animals with 50 or 100 nanograms of the growth factor every other day for five days. The level of signaling molecules that promote inflammation decreased while the level of signaling molecules that counter inflammation increased. Neural cells grew and nerves laid bare by MS were rewrapped with myelin. The 100-nanogram injections appeared to provide slightly better recovery.

Read the original:
Growth factor in stem cells may spur recovery from multiple sclerosis

Canadian regulators have approved the world's first stem cell drug.

The drug, Prochymal, will be used to treat a deadly side effect of bone marrow transplants called acute graft-versus host disease (GvHD), which occurs in children.

Acute graft-versus host disease kills about 80 percent of children affected.

Prochymal uses stem cells from healthy adult donors, with one donation able to create 10,000 doses of the drug, reported the New York Times.

The manufacturer, Maryland-based Osiris Therapeutics Inc., saw their shares climb 5.5 percent to $5.55 after losing 24 percent in the last year, reported Bloomberg.

In extended trading, stocks rose 14 percent.

The drug was approved, said Reuters, on the condition that further clinical tests are carried out.

There has been debate about the effectiveness of the drug in recent years.

Late stage clinical trials three years ago failed to show results but more recent tests have shown the drug to be relatively effective about a month into therapy.

Osiris says that it plans to seek approval from the US Food and Drug Administration this year.

Original post:
Stem cell drug approved in Canada to treat bone marrow disease

Cell surface protein blows potent cells cover; targeted drug works in preclinical tests

Newswise HOUSTON Breast cancer stem cells wear a cell surface protein that is part nametag and part bulls eye, identifying them as potent tumor-generating cells and flagging their vulnerability to a drug, researchers at The University of Texas MD Anderson Cancer Center report online in Journal of Clinical Investigation.

Weve discovered a single marker for breast cancer stem cells and also found that its targetable with a small molecule drug that inhibits an enzyme crucial to its synthesis, said co-senior author Michael Andreeff, M.D., Ph.D., professor in MD Andersons Departments of Leukemia and Stem Cell Transplantation and Cellular Therapy.

Andreeff and colleagues are refining the drug as a potential targeted therapy for breast cancer stem cells, which are thought to be crucial to therapy resistance, disease progression and spread to other organs.

Its been difficult to identify cancer stem cells in solid tumors, Andreeff said. And nobody has managed to target these cells very well.

The marker is the cell surface protein ganglioside GD2. The drug is triptolide, an experimental drug that Andreeff has used in preclinical leukemia research. The team found triptolide blocks expression of GD3 synthase, which is essential to GD2production.

Triptolide stymied cancer growth in cell line experiments and resulted in smaller tumors and prolonged survival in mouse experiments. Drug development for human trials probably will take several years.

Cancer stem cells are similar to normal stem cells

Research in several types of cancer has shown cancer stem cells are a small subpopulation of cancer cells that are capable of long-term self-renewal and generation of new tumors. More recent research shows they resist treatment and promote metastasis.

Cancer stem cells are similar to normal stem cells that renew specialized tissues. The breast cancer findings grew out of Andreeffs long-term research in mesenchymal stem cells, which can divide into one copy of themselves and one differentiated copy of a bone, muscle, fat or cartilage cell.

Continue reading here:
Scientists Discover Marker to Identify, Attack Breast Cancer Stem Cells

To get your name on a bone marrow donor registry list takes just a couple drops of blood.

STORY HIGHLIGHTS

(CNN) -- Registering to become a bone marrow donor just became as simple as tending to a paper cut.

Help Remedies, a small health care products company, has recently teamed up with DKMS, the world's largest bone marrow donor center, to release Help: I Want to Save a Life. The product contains 16 adhesive bandages and a bone marrow testing kit.

Now when people cut themselves and search for a bandage they can dab their blood with a cotton swab, place it in the pre-packaged envelope, and mail it into the lab. After mailing in the kit, people fill out a brief form online and are instantly added to the United States national bone marrow registry, called Be the Match.

"The magic of this idea is that it just feels like it's part of the process," said Nathan Frank, co-founder and creative director of Help Remedies. "You cut yourself, you dip it [the test] in blood. You don't step out of what you're doing physically or mentally."

According to the National Marrow Donor Program, more than 10,000 people in the United States are diagnosed with diseases every year, the only cure being a bone marrow transplant from an unrelated donor. Patients need donors who are a close genetic match, and ethnicity/heritage are key in making that match.

The Be the Match Registry has more than 9.5 million donors (300,000 of whom are associated with DKMS), but only one in 540 will be matched with a patient in need. Help Remedies and DKMS are hoping to improve those statistics.

Part of this product's appeal is that customers can purchase Help: I Want to Save a Life and satisfy their altruistic side without paying extra. Customers pay $4, the cost of the bandages.

"It is basically an add-on and people can have the benefit of the kit without paying extra," Frank said. "They shouldn't have to pay extra to do something good. We wanted to give this as a gift to people."

Continue reading here:
Get a paper cut, save a life

What if your very own bone marrow stem cells, upgraded with more immune cells, could be used to increase your chances of survival after a heart attack? Sounds like the stuff of science fiction, but according to a study done by Timothy Henry, MD of the Minneapolis Heart Institute and colleagues, it may in fact be possible. The findings, which were presented at the Society for Cardiovascular Angiography, are considered preliminary until they are published in a peer-reviewed journal, but they are definitely promising.

"With stem cells, we've been successful with processes that improve blood flow," Henry told MedPage Today, and added that there is a significant number of class III heart failure patients who don't do well on medications or with devices.

"A therapy that would delay heart failure progression would be a major step forward," he said. "This small trial proved the intervention is safe and all the trends were in the right direction."

The next phase of the trial will begin in the summer. Stay tuned!

Go here to see the original:
Stem Cells May Help Heart Patients

Pluristem Therapeutics Ltd. (Nasdaq:PSTI; DAX: PJT: PLTR)has announced that a seven year-old girl suffering from an aplastic bone marrow whose condition was rapidly deteriorating has seen a reversal of her condition. The improvement came due to a significant increase in her red cells, white cells and platelets following the intramuscular injection of Pluristem's PLacental eXpanded (PLX) cells. Aplastic bone marrow is a disease where the patient has no blood-forming hematopoietic stem cells in the bone marrow.

Hadassah Medical Center Bone Marrow Transplantation, Cell Therapy and Transplantation Research Center director Prof. Reuven Or said, "With her body rejecting all possible treatment, and with no other options, we finally turned to Pluristem's PLX cells, which literally saved her life. The results of this unique case indicate that PLX cells may be effective in treating other diseases that affect the bone marrow."

The patient has been hospitalized at the Hadassah Hebrew University Medical Center in Jerusalem since August 2011. Her aplastic bone marrow had been refractory to treatment. So she underwent allogeneic stem cell transplantation from a matched unrelated donor. The first transplant was unsuccessful and the patient remained with bone marrow failure. The patient underwent a second allogeneic stem cell transplantation from a second donor. The bone marrow function was very poor and the patient suffered from recurrent infections.

Two months after the patient's second bone marrow transplant, the child received PLX cells intramuscularly in two doses about one week apart. Some 10 days after the last administration of PLX cells, the patient's hematological parameters began to significantly increase, an effect that has persisted to date. The patient's general clinical status has also improved. Subsequent analysis has indicated that the PLX cells worked by stimulating the recovery of the hematopoietic stem cells contained in the second bone marrow transplant that she had received over two months earlier. Finally, after nine months of hospitalization, the child will be discharged from the hospital.

Pluristem chairman and CEO Zami Alberman said, "Pluristem is extremely happy that our PLX cells have helped this little girl. Remarkably, these beneficial effects were seen in the patient after our PLX cells were administered intramuscularly and correlate with the positive effects on the bone marrow when we administered our PLX cells intramuscularly (IM) in animals exposed to toxic levels of radiation. Pluristem now has several data points to indicate that our PLX cells may work for systemic diseases when given locally, away from the target organ, and without a need to give cells intravenously."

In February 2012, Pluristem announced the results of animal studies suggesting PLX cells can be potentially effective in treating the life threatening hematopoietic complications associated with Acute Radiation Syndrome (ARS). In these experiments, animals given PLX cells IM up to 24 hours post irradiation demonstrated a recovery of their red cells, white cells, platelets and bone marrow to almost normal levels. It was that announcement, and the significant deterioration of the patient following two bone marrow transplants, that led Prof. Or to contact Pluristem about the possible compassionate use of PLX cells to treat his young patient.

Pluristem recently received US FDA clearance to begin a Phase II clinical trial using the company's proprietary PLX-PAD cell product candidate intramuscularly for the treatment of Intermittent Claudication (IC), a subset of peripheral artery disease (PAD).

Published by Globes, Israel business news - http://www.globes-online.com - on May 9, 2012

Copyright of Globes Publisher Itonut (1983) Ltd. 2012

Read the original here:
Pluristem stem cells save girl's life

LAS VEGAS, May 10, 2012 /PRNewswire/ -- An investigational therapyderived from a patient's own bone marrow stem cells improves heart function in some patients with progressive heart failure due to dilated cardiomyopathy (DCM), according to the results of a Phase 2a study presented today as a late-breaking clinical trial at the SCAI 2012 Scientific Sessions.

Ixmyelocel-T is developed by culturing a patient's bone marrow for 12 days to increase the numbers of immune cells including macrophages and monocytes, as well as mesenchymal cells, stem cells that can differentiate into several different cell types. The resulting cell treatment is then injected into the patient's heart muscles to encourage growth of new tissue and improve inflammation.

"An increasing number of patients have progressive heart failure due to dilated cardiomyopathy, even after treatment with drug therapy and surgical intervention," said Timothy Henry, MD, FSCAI, director of research and an interventional cardiologist at the Minneapolis Heart Institute at Abbott Northwestern Hospital, and the study's principal investigator. "In this study, patients treated with ixmyelocel-T showed repair in damaged heart muscle and some reversal in heart failure symptoms."

The trial included 22 ischemic (IDCM) and non-ischemic (NIDCM) patients with a New York Heart Association (NYHA) heart failure class of III or IV, or moderate to severe heart failure, and a left ventricular ejection fraction of 30 percent or less, which is a measure of how much blood leaves the heart with each pump. Patients were randomized to receive an injection of the treatment into their heart muscles or to a control group, and were followed at 3, 6 and 12 months.

After 12 months, no procedural complications and no difference in adverse events were reported among patients who received the treatment and the control group. IDCM patients who received the cell treatment had a lower mean number of major adverse clinical events (0.33 compared to 1.67 in the control group). IDCM patients who received the treatment were more likely to see improvement in NYHA class, six-minute walking distance and ejection fraction, compared to NIDCM patients who received the treatment and those in the control group.

"Treatment with ixmyelocel-T was well-tolerated and patients who received the cell therapy showed improved symptoms after one year," said Dr. Henry. "The results provide a strong basis for a larger clinical trial of this treatment in patients with dilated cardiomyopathy."

The study was sponsored by Aastrom Biosciences.

Dr. Henry will present "Safety and Efficacy ofIxmyelocel-T, An Expanded Patient-Specific Mixed Cell Therapy, in Dilated Cardiomyopathy" on Thursday, May 10, 2012, in the Late-Breaking Clinical Trials Session beginning at 12:00 p.m. (Pacific Time).

About SCAI

Headquartered in Washington, D.C., the Society for Cardiovascular Angiography and Interventions is a 4,000-member professional organization representing invasive and interventional cardiologists in approximately 70 nations. SCAI's mission is to promote excellence in invasive and interventional cardiovascular medicine through physician education and representation, and advancement of quality standards to enhance patient care. SCAI's patient education program, Seconds Count, offers comprehensive information about cardiovascular disease. For more information about SCAI and Seconds Count, visit http://www.scai.org or http://www.SecondsCount.org.

Read the rest here:
Treatment with Ixmyelocel-T Shown to Improve Outcomes in Heart Failure Patients

(CBS News) Patients with brain cancer may face devastating side effects from chemotherapy, but a new study offers a possible solution: stem cells.

Yearly dental X-rays raise brain tumor risk, study finds

Memorial Hermann hospital in Houston to live tweet brain tumor surgery

The stem cells form a shield of sorts against the toxic side effects from chemo, according to the researchers behind the study. It was a small trial that involved only three patients with glioblastoma, the most aggressive and common form of a malignant brain tumor that's usually fatal.

Two of the patients survived longer than predicted with help from the stem cell treatment - an average of 22 months - and a third man from Alaska remains alive today with no disease progression almost three years following treatment.

How does it work?

Many patients with the deadly form of brain cancer possess a gene called MGMT. The MGMT gene is typically turned on and counters the effects from some chemotherapy agents, such as temozolomide, rendering them less effective. As such, people with such a gene often have a particularly poor prognosis.

A drug called benzylguanine can block the MGMT gene, thus making tumors more receptive to chemotherapy, but the combination of the drug and chemo are often too toxic for healthy bone marrow cells.

That's where the new stem cell treatment comes in. By combining bone marrow stem cells with a modified version of MGMT in the form of the new treatment, patients' cells were protected from the toxic effects of the cancer drugs and chemotherapy while keeping the tumor cells targeted.

"This therapy is analogous to firing at both tumor cells and bone marrow cells, but giving the bone marrow cells protective shields while the tumor cells are unshielded," study author Dr. Jennifer Adair, a researcher at the Fred Hutchinson Cancer Research Center in Seattle, said in a news release.

Follow this link:
Stem cells boost brain tumor treatments for some patients, study finds

HAIFA, Israel, May 9, 2012 (GLOBE NEWSWIRE) -- Pluristem Therapeutics, Inc. (Nasdaq:PSTI - News) (TASE:PLTR) today announced that a seven year-old girl suffering from an aplastic bone marrow whose condition was rapidly deteriorating is now experiencing a reversal of her condition with a significant increase in her red cells, white cells and platelets following the intramuscular injection of the company's PLacental eXpanded (PLX) cells. Aplastic bone marrow is a disease where the patient has no blood-forming hematopoietic stem cells in the bone marrow.

"With her body rejecting all possible treatment -- and with no other options -- we finally turned to Pluristem's PLX cells, which literally saved her life," said Professor Reuven Or, Director of Bone Marrow Transplantation, Cell Therapy and Transplantation Research Center at Hadassah Medical Center and the child's physician. "The results of this unique case indicate that PLX cells may be effective in treating other diseases that affect the bone marrow."

The patient has been hospitalized at the Hadassah Hebrew University Medical Center, Jerusalem since August 2011. Her aplastic bone marrow had been refractory to treatment and, therefore, she underwent allogeneic stem cell transplantation from a matched unrelated donor. The first transplant was unsuccessful and the patient remained with bone marrow failure. Therefore, the patient underwent a second allogeneic stem cell transplantation from a second donor. Unfortunately, the bone marrow function was very poor and the patient suffered from recurrent infections. Approximately two months after the patient's second bone marrow transplant, the child received PLX cells intramuscularly in two doses approximately one week apart. Approximately 10 days after the last administration of PLX cells, the patient's hematological parameters began to significantly increase, an effect that has persisted to date. Additionally, the patient's general clinical status has improved. Subsequent analysis has indicated that the PLX cells worked by stimulating the recovery of the hematopoietic stem cells contained in the second bone marrow transplant that she had received over two months earlier. Finally, after nine months of hospitalization, the child will be discharged from the hospital.

"Pluristem is extremely happy that our PLX cells have helped this little girl," said Zami Aberman, Chairman and CEO of Pluristem. "Remarkably, these beneficial effects were seen in the patient after our PLX cells were administered intramuscularly and correlates with the positive effects on the bone marrow when we administered our PLX cells intramuscularly (IM) in animals exposed to toxic levels of radiation. Pluristem now has several data points to indicate that our PLX cells may work for systemic diseases when given locally, away from the target organ, and without a need to give cells intravenously."

In February 2012, Pluristem announced the results of animal studies suggesting PLX cells can be potentially effective in treating the life threatening hematopoietic complications associated with Acute Radiation Syndrome (ARS). In these experiments, animals given PLX cells IM up to 24 hours post irradiation demonstrated a recovery of their red cells, white cells, platelets and bone marrow to almost normal levels. It was that announcement, and the significant deterioration of the patient following two bone marrow transplants, that led Professor Reuven Or to contact Pluristem about the possible compassionate use of PLX cells to treat his young patient.

Pluristem recently received U.S. FDA Clearance to begin a Phase II clinical trial using the company's proprietary PLX-PAD cell product candidate intramuscularly for the treatment of Intermittent Claudication (IC), a subset of peripheral artery disease (PAD). In April, the Company was awarded a $3.1 Million grant by the Israeli Government, which will be used to help fund R&D and clinical trials.

About Pluristem Therapeutics Inc.

Pluristem Therapeutics Inc. (Nasdaq:PSTI - News) (TASE:PLTR) is a leading developer of placenta-based cell therapies. The Company's patented PLX (PLacental eXpanded) cells are a drug delivery platform that releases a cocktail of therapeutic proteins in response to a host of local and systemic inflammatory and ischemic diseases. PLX cells are grown using the company's proprietary 3D micro-environmental technology and are an "off-the-shelf" product that requires no tissue matching prior to administration. Pluristem is focusing on the use of PLX cells administered locally to treat systemic diseases and potentially obviating the need to use the intravenous route.

Data from two phase I/II studies indicate that Pluristem's first PLX product candidate, PLX-PAD, is safe and potentially effective for the treatment of end stage peripheral artery disease when given locally. Additionally, Pluristem is developing PLX-PAD for cardiac ischemia, PLX-BMP for Acute Radiation Exposure, Bone Marrow Transplant Failure and Chemotherapy induced Bone Marrow Aplasia, PLX-ORTHO for orthopedic indications and PLX-PAH for Pulmonary Hypertension in collaboration with United Therapeutics. Pluristem's pre-clinical animal models have demonstrated PLX cells are also potentially effective in other inflammatory/ischemic indications, including diastolic heart failure, inflammatory bowel disease, neuropathic pain and pulmonary fibrosis.

Pluristem has a strong patent portfolio, GMP certified manufacturing and research facilities as well as strategic relationships with major research institutions.

Read the original post:
Compassionate Use of Pluristem's PLX Cells Saves the Life of a Child After Bone Marrow Transplantation Failure

Newswise Timothy Cripe, MD, PhD, chief of Hematology/Oncology/Bone Marrow Transplantation at Nationwide Childrens Hospital, was recently appointed a member of the Cellular, Tissue and Gene Therapy Advisory Committee which reports to the Food and Drug Administration (FDA).

This committee provides guidance to the FDA in approving novel cellular, tissue and gene therapy therapeutics and devices. In recent years, the committee reviewed applications for the new cancer immunotherapy Sipuleucel-T (Provenge) and the first licensed cord blood product, HEMACORD. The committee is also charged with reviewing applications that use embryonic stem cells or other cellular therapies.

Such committees of the FDA are established to provide functions which support its mission of protecting and promoting the public health, while meeting the requirements set forth in the Federal Advisory Committee Act. The FDA has 32 Advisory Committees across all Centers which are subject to renewal at two-year intervals unless the committee charter states otherwise. They are advisory in nature with the FDA making final decisions.

Dr. Cripe recently came to Nationwide Childrens from Cincinnati Childrens Hospital Medical Center where he served as medical co-director in Clinical and Translational Research and was the founding director of the Comprehensive Musculoskeletal Tumor Program. During his stint at Cincinnati, he was a professor of Pediatrics and Director of Pilot and Collaborative Studies in the Center for Clinical and Translational Science and Training.

His clinical interests include gene and viral therapies for solid tumors in children, including brain tumors, neuroblastoma and bone and soft tissue sarcomas. Dr. Cripes current research focuses on developing and testing new, targeted therapies for pediatric solid tumors and translating those findings into clinical studies. He also investigates the use of viruses that selectively infect and kill cancer cells, studies their utility for killing cancer stem cells, and was among the first in the country to launch clinical trials of attenuated viruses in children.

Dr. Cripe is a magna cum laude graduate of Princeton University and completed his MD, PhD in genetics and pediatric residency training at the University of Iowa. He was a fellow in pediatric hematology/oncology at the Childrens Hospital and the Dana-Farber Cancer Institute in Boston, and at the Childrens Hospital and University of Colorado Health Sciences Center in Denver.

Following his subspecialty training, he was an assistant professor of Pediatrics at the University of Wisconsin Childrens Hospital and Comprehensive Cancer Center in Madison and was the pediatric medical director of the UW/American Red Cross Hemophilia Treatment Center.

See the original post:
Dr. Timothy Cripe of Nationwide Children's Hospital Appointed to a Committee of the Food and Drug Administration

After half a year of blood transfusions to treat life-threatening anemia, 9-year-old Ricky Martinez was running out of time.

The Murrieta boy needed a bone marrow transplant to save his life. Although his parents had held numerous drives seeking a match for their son, the perfect donor eluded them.

Then another option appeared ---- doctors found Ricky's own blood from his umbilical cord, banked at birth, and stored in a medical facility.

"I had donated it at birth, when I delivered," said Ricky's mother, Cynthia Martinez. "I had no idea that I'd be using it for him nine years later."

The cord blood discovery represents a "godsend" for the family, Martinez said, because Ricky's body began rejecting the transfusions that keep him alive.

Cord blood contains stem cells ---- undifferentiated cells that can spur production of healthy tissue to help treat various diseases. Doctors believe it could jump-start Ricky's bone marrow, allowing his body to resume normal blood production.

But it's not a guarantee.

Ricky's condition, aplastic anemia, is an extremely rare disease, and cord blood transplantation is an experimental procedure for the condition, said David Buchbinder, a hematologist and transplant physician who is treating Ricky at Children's Hospital Orange County, in the city of Orange.

Although the procedure offers few risks of complications, it also pushes the boundaries of medical practice, placing Ricky in a realm of mixed medical opinions and uncertain results, Buchbinder said.

His parents say they're willing to go there to save their son's life.

Read the original post:
REGION: Surprise cord-blood find is 'godsend' for ailing boy

Kristin Taylor truly believes everyone has the power to change the world for the better, and she hopes to convince hundreds of Puebloans to do it the same way she did.

Taylor, 36, didn't hesitate 13 months ago when she got a call asking her to donate bone marrow for a complete stranger somewhere in the United States.

The woman was 58 and dying of leukemia. Taylor's own mom was 58 at the time, too.

"I knew I sure wasn't ready to say goodbye to my mom. I didn't hesitate to say yes," Taylor said. The mental connection involving her mom created an emotional connection with the stranger who needed her marrow, she said.

Taylor still hasn't met the woman who received her bone marrow in September, but she gets regular updates on the woman's condition from the National Marrow Donor Program, the parent organization of the Colorado Marrow Donor Program.

"She's alive, and she's doing well. After a year, the anonymity requirement will be dropped if we both agree," Taylor said.

While she awaits another call, Taylor hopes to convince other Puebloans to add their names to the national registry, which is sorely lacking volunteer donors of Hispanic heritage and other ethnic minority groups.

To that end, Taylor has organized a bone marrow donor drive for 9 a.m. to 1 p.m. Saturday at the Robert Hoag Rawlings Public Library, 100 E. Abriendo Ave. The event is co-sponsored by Bonfils Blood Center as part of Be the Match, a national campaign to broaden the donor registry.

"Pueblo's a melting pot of ethnicities, and this city could make a humongous difference in the registry," Taylor said, adding, "They are desperately seeking people of different ethnic backgrounds to help those with leukemia, aplastic anemia, Hodgkin lymphoma, immune deficiency disorders and some types of breast and ovarian cancers."

Taylor said her donation process involved having a complete physical and chest X-rays at St. Mary-Corwin Medical Center's Roger Dorcy Cancer Center before being injected with a drug that spurs rapid development of stem cells in the blood.

Go here to see the original:
Woman donated bone marrow, hopes others will do the same

ScienceDaily (May 3, 2012) Researchers have rejuvenated aged hematopoietic stem cells to be functionally younger, offering intriguing clues into how medicine might one day fend off some ailments of old age.

Scientists at Cincinnati Children's Hospital Medical Center and the Ulm University Medicine in Germany report their findings online May 3 in the journal Cell Stem Cell. The paper brings new perspective to what has been a life science controversy -- countering what used to be broad consensus that the aging of hematopoietic stem cells (HSCs) was locked in by nature and not reversible by therapeutic intervention.

HSCs are stem cells that originate in the bone marrow and generate all of the body's red and white blood cells and platelets. They are an essential support mechanism of blood cells and the immune system. As humans and other species age, HSCs become more numerous but less effective at regenerating blood cells and immune cells. This makes older people more susceptible to infections and disease, including leukemia.

Researchers in the current study determined a protein that regulates cell signaling -- Cdc42 -- also controls a molecular process that causes HSCs from mice to age. Pharmacologic inhibition of Cdc42 reversed HSC aging and restored function similar to that of younger stem cells, explained Hartmut Geiger, PhD, the study's principal investigator and a researcher in the Division of Experimental Hematology/Cancer Biology at Cincinnati Children's, and the Department of Dermatology and Allergic Diseases, Ulm University Medicine.

"Aging is interesting, in part because we still don't understand how we age," Geiger said. "Our findings suggest a novel and important role for Cdc42 and identify its activity as a target for ameliorating natural HSC aging. We know the aging of HSCs reduces in part the response of the immune system response in older people, which contributes to diseases such as anemia, and may be the cause of tissue attrition in certain systems of the body."

The findings are early and involve laboratory manipulation of mouse cells, so it remains to be seen what direct application they may have for humans. Still, the study expands what is known about the basic molecular and cellular mechanisms of aging -- a necessary step to one day designing rational approaches to aiding a healthy aging process.

One reason the research team focused on Cdc42 is that previous studies have reported elevated activity of the protein in various tissue types of older mice -- which have a natural life span of around two years. Also, elevated expression of Cdc42 has been found in immune system white blood cells in older humans.

In the current study, researchers found elevated activity of Cdc42 in the HSCs of older mice. They also were able to induce premature aging of HSCs in mice by genetically increasing Cdc42 activity in the cells. The aged cells lost structural organization and polarity, resulting in improper placement and spacing of components inside the cells. This disorganization contributed to the cells' decreased functional efficiency.

The researchers then analyzed HSCs from older mice to see if inhibition of Cdc42 would reverse the aging process. They used a specific dose (5uM) of a pharmacologic inhibitor of Cdc42, CASIN, to reduce the protein's activity in the cells -- processing them for 16 hours ex vivo in laboratory cultures. This improved structural organization, increased polarity and restored functionality in the older cells to levels found in young cells.

To test the rejuvenated cells, the researchers used a process known as serial competitive transplantation. This included extracting HSCs from young (2-4 months) and aged (20-26 months) mice and processing them in laboratory cultures. Young and rejuvenated cells were then engrafted into recipient mice. This allowed scientists to compare how well young and rejuvenated aged HSCs started to repopulate and transform into different types of blood cells. It also confirmed that HSCs rejuvenated by targeting Cdc42 do function similarly to young stem cells.

Read this article:
Aged hematopoietic stem cells rejuvenated to be functionally younger

Every year in the US, about 1.3 million people undergo bone graft surgeries to repair defects left by accidents or disease. While natural bone tissue is the ideal choice for grafts, using a patient's own bone means additional surgery and risks, and donor bone grafts can be rejected.

Engineered grafts that use ceramic, glass or even metal to provide a scaffold for new bone cells to grow are thought to be a promising alternative to natural bone. Some researchers are looking to a more unexpected source of material for bone grafts - the larva of Bombyx mori, also known as the the domesticated silkworm.

Silk is a promising material for bone grafts because it is the strongest naturally occurring fiber, according to David Kaplan, a Tufts University biomedical engineer. A strand of spider silk is five times stronger than a steel fiber of the same diameter, and almost as strong as Kevlar, one of the strongest manmade fibers.

The material is also easy to sterilize, and researchers can also control how quickly the silk graft degrades. But while a sponge-shaped silk matrix allows bone cells to grow, it isn't strong enough to endure the stresses of movement and compression.

"It supports the biology, but not the mechanics," said Kaplan.

Usually researchers have attempted to shore up a silk matrix with other materials like collagen, but this often means sacrificing either strength or flexibility in the final graft, according to Kaplan.

Now, Kaplan and a group of international colleagues say they've been able to strengthen the silk matrix by using tiny silk fibers scattered throughout the walls of the silk "sponge", akin to how a length of steel bar is used to reinforce a concrete structure .

They described their results in a paper that appeared Monday in the journal Proceedings of the National Academy of Sciences.

Kaplan and his colleagues used a new method to create the tiny tendrils of silk to reinforce the matrix: they washed silk fibers with water and lye, producing tiny fibrils with a length between 10 and 20 micrometers - about one two-thousandth of an inch - within one minute. Conventional silk processing methods produce a much longer fiber of more than 100 micrometers after 12 minutes, according to the authors.

Those tiny fibers, strewn about within the walls of the silk matrix, make a big difference. In addition to being stronger than the unenhanced silk matrix, the composite material also mimicked a number of the features of natural bone in terms of stiffness and roughness.

Continued here:
Strengthening Silk Bone Grafts: Scientists Work To Harness World’s Strongest Natural Fiber

BEIRUT: A Lebanese expatriate in Australia in need of a bone marrow transplant is looking to find a match in Lebanon and in the process is working to raise awareness to create a national registry of donors in Lebanon.

It would be amazing if there could be a bone marrow registry in Lebanon, says Pamela Bou Sejean. Im getting treatment to keep my cancer under control. But I cant go on too long, said 26-year-old Lebanese expatriate from Western Australia who was diagnosed in 2010 with Hodgkins lymphoma, a type of leukemia that can be treated with a bone marrow transplant.

Bone marrow transplants treat different types of blood cancer, including leukemia, lymphoma and multiple myloma, as well as several non-malignant conditions. The United States and Western Europe have databases for anonymous donors, with Germany having approximately 1 million registered. The best matches tend to be from donors related to the patient, and when that fails, doctors turn to their national registries.

None of Bou Sejeans relatives turned out to be a match, nor was anyone on the national registry in Australia. Her doctors told her that her best hope would be to find a match in her ancestral country of Lebanon, where potential donors have similar genes.

However, until now, bone marrow transplants in Lebanon have almost all been done with relatives of patients because of a lack of a national registry, as well as government funding or charities that can cover the $500 cost of the donor test.

Australia, on the other hand, has been covering the entire cost of Bou Sejeans treatment, including a $10,000 stem cell transplant last year and all of her tests in Lebanon.

Bou Sejean is hoping that her story will help raise enough awareness to push the government to create a national registry program and also encourage Lebanese citizens to take the test and the chance to save someones life.

If a registry is available, people can take the test, Bou Sejean says. Its not painful. Its just like a blood test. It takes the blood and separates the stem cells. To save someones life is worth it.

Bou Sejeans public awareness campaign started when a friend told her local newspaper, the Geelong Advertiser, about her situation. Other media interviews followed. When it was announced that President Michel Sleiman would be traveling to Australia, a newspaper put her in contact with his staff, who arranged a private meeting that lasted half an hour during his state visit.

During a speech in which he addressed members of Lebanons expatriate community in Melbourne, Sleiman implored the Lebanese to take the test to see if they are a match, rhetorically asking, Are we incapable of giving Pamela blood?

Read the original post:
Woman’s plight spurs push for marrow registry - feature

Stem cell transplant wait time considerably longer in poor countries. Nigeria's recently established bone marrow registry promises to boost lifesaving matches

Some 200,000 babies are born annually in sub-Saharan Africa with sickle cell disease, a blood disorder in which mutated red blood cells can clump and block blood vessels, causing pain, infection and organ damage. Nigeria has up to two million sickle cell patients, many of whom can benefit from stem cell transplants.

Stem cells are the building blocks of blood and immune cells. Establishing the mechanics of stem cell transplantation in Nigeria is a very important milestone, said Terry Schlaphoff, deputy director of South Africas bone marrow registry.

Bone marrow registries hold key information about stem cell donors to help match them with patients. There are currently two such registries in Africa, one in South Africa and now Nigeria.

In countries with low per capita incomes, stem cell transplants remain relatively rare due to lack of knowledge, trained health workers and, most importantly, availability of stem cells. African patients who need a matching donor have virtually no chance of survival, unless they are wealthy enough to travel abroad for treatment, said Seun Adebiyi, founder of Nigerias bone marrow registry.

Matching bone marrow or blood cells collected from donors to the patients who need it can offer lifesaving treatments for more than 70 diseases, including leukaemia, lymphoma (cancer) and sickle-cell anaemia.

Limited availability

Worldwide, there are fewer than 15 million registered donors, and patients far outstrip the number of donors, according to the Netherlands-based information centre, Bone Marrow Donors Worldwide (BMDW).

Reflecting only a fraction of overall need, 14,206 transplants from non-relatives and 4,255 transplants from umbilical cord blood were provided to patients worldwide in 2011, said Machteld Oudshoorn, chair of BMDWs editorial board.

For most patients in developing countries, awaiting a transplant remains associated with significant morbidity and mortality, and represents one example of high-cost, highly specialized medicine, according to a recent medical report.

More:
NIGERIA: Bone marrow register an important milestone