What is CRISPR technology and can it improve poor eyesight? | World Economic Forum – World Economic Forum
Posted: November 21, 2021 at 1:49 am
More evidence for the efficacy of a groundbreaking new gene-editing medical procedure has emerged, deepening hope it will provide one-shot treatments or even cures for cancer, sickle cell anaemia and other conditions.
Some people suffering from a rare severe visual disorder were able to see more clearly after being treated using the gene-editing technology known as CRISPR, according to reports.
For the first time, CRISPR gene-editing tools were injected directly into the human body, in this case to tackle the leber congenital amaurosis (LCA) condition that made it difficult for the volunteers to navigate their surroundings or see colours.
A volunteer in the experiment can now see colours and regained more peripheral vision.
Image: Mass Eye and Ear
In 2012, CRISPR, which stands for Clustered Regularly Interspaced Short Palindromic Repeats, was first engineered as a biological tool capable of precisely altering DNA. Over the last decade, scientists around the world have continued to improve the safety and efficacy of CRISPR technologies, opening the door to potentially treating a range of genetic diseases.
For years, scientists have been trying to devise treatments that directly address the root cause of disease on the genetic level. Many commonly-used drugs act like a sledgehammer and non-specifically treat disease, which can lead to negative side effects and have varying impact across patients.
CRISPR falls into a category called precision medicine, which can precisely address the specific genetic defect causing a particular disease.
CRISPR works by combining scissor-like proteins with other molecules to locate troublesome parts of a persons DNA blueprint the genome.
CRISPR allows scientists to remove these disease-causing regions of the genome or replace them with DNA that stops or reverses the illness.
CRISPR is already used for a range of applications, from simple diagnostic tools to basic research purposes. During the pandemic, scientists created a CRISPR-based test for COVID-19.
But its wider rollout as a therapy depends on more trials and examination of possible side effects. Over a year following the CRISPR-based treatment of a patient with sickle cell disease, positive health improvements suggest that gene editing may offer a viable cure for many genetic diseases, but broad testing and long-term monitoring remain vital.
The application of precision medicine to save and improve lives relies on good-quality, easily-accessible data on everything from our DNA to lifestyle and environmental factors. The opposite to a one-size-fits-all healthcare system, it has vast, untapped potential to transform the treatment and prediction of rare diseasesand disease in general.
But there is no global governance framework for such data and no common data portal. This is a problem that contributes to the premature deaths of hundreds of millions of rare-disease patients worldwide.
The World Economic Forums Breaking Barriers to Health Data Governance initiative is focused on creating, testing and growing a framework to support effective and responsible access across borders to sensitive health data for the treatment and diagnosis of rare diseases.
The data will be shared via a federated data system: a decentralized approach that allows different institutions to access each others data without that data ever leaving the organization it originated from. This is done via an application programming interface and strikes a balance between simply pooling data (posing security concerns) and limiting access completely.
The project is a collaboration between entities in the UK (Genomics England), Australia (Australian Genomics Health Alliance), Canada (Genomics4RD), and the US (Intermountain Healthcare).
The application to LCA volunteers at Oregon Health & Science Universitys Casey Eye Institute in the US is a first of its kind.
To date, CRISPR treatments involved taking cells from a patient and changing parts of the subjects DNA before reinserting the edited cells back into the patient. Once back inside the body, the cells could multiply and hopefully eliminate the disease.
In the Oregon trials, however, the CRISPR tools were injected directly into the seven volunteers without removing any of their cells. In their case, it was inserted into the retina of the eye.
This new technique holds out hope for treatment of conditions in parts of the body from which cells cant be safely removed, such as the brain.
Its a really amazing technology and very powerful, Dr Mark Pennesi, Professor of Ophthalmology at the Institute told NPR.
One of the Oregon volunteers, Carlene Knight, said she was able to safely navigate her surroundings following the procedure, while another, Michael Kalberer, found he could see colours for the first time.
At his cousins wedding, Kalberer discovered that he could see the DJs strobe lights change colour and identify them to my cousins who were dancing with me, he told NPR. That was a very, very fun, joyous moment.
The trial is still ongoing and other volunteers didnt experience the same improvement. So its too soon to say when CRISPR will be able to treat sufferers of other genetic illnesses as effectively.
The views expressed in this article are those of the author alone and not the World Economic Forum.
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What is CRISPR technology and can it improve poor eyesight? | World Economic Forum - World Economic Forum
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