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The CRISPR treatment for LCA10 (the most common variant of Leber congenital amaurosis which is the leading cause of inherited childhood blindness) modifies the patient's defective photoreceptor gene. In March 2020, the first patient volunteer in this US-based study, sponsored by Editas Medicine , was given a low-dose of the treatment to test ...
The study was conducted in human retinal pigment epithelial cells, and the use of CRISPR led to a selection against cells with a functional p53 pathway. The study concluded that p53 inhibition might increase HGE efficiency and that p53 function would need to be watched when developing CRISPR/Cas9 based therapy.
The safety of gene therapy treatment is of utmost concern, especially during clinical trials when off-target modifications can block the further development of a candidate product. [57] Perhaps the most well-known example of modern gene therapy is CAR-T therapy, which is used for the treatment of B-cell lymphoma .
Once the CRISPR or gene therapy cells are ready, patients receive high-dose chemotherapy in order to remove their existing bone marrow and make room for the newly edited cells, which will then ...
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Substrate reduction therapy is FDA approved and there is at least one treatment available on the market. [10] Gene therapy aims to replace a missing protein in the body through the use of vectors, usually viral vectors. [11] In gene therapy, a gene encoding for a certain protein is inserted into a vector. [11]
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Targeted gene knockout using CRISPR/Cas9 requires the use of a delivery system to introduce the sgRNA and Cas9 into the cell. Although a number of different delivery systems are potentially available for CRISPR, [37] [38] genome-wide loss-of-function screens are predominantly carried out using third generation lentiviral vectors.