Editas Medicine has been granted a patent for methods and compositions to enhance the compatibility of donor cells for transplantation. The invention involves modifying immunogenicity genes in cells, such as HLA genes, to reduce cell surface expression of specific proteins, making them suitable for transplantation. GlobalData’s report on Editas Medicine gives a 360-degree view of the company including its patenting strategy. Buy the report here.
According to GlobalData’s company profile on Editas Medicine, CRISPR genome editing was a key innovation area identified from patents. Editas Medicine's grant share as of February 2024 was 16%. Grant share is based on the ratio of number of grants to total number of patents.
Allele-specific modification of hla genes for cell transplantation
A recently granted patent (Publication Number: US11911415B2) outlines a method for reducing the cell surface expression of a protein encoded by a specific allele of an endogenous human leukocyte antigen (HLA) gene in blood cells. The method involves contacting the blood cell with an allele-specific gRNA molecule and a Cas9 molecule, leading to a knock-out or knock-down of the expression of the targeted allele. This approach allows for the reduction of the cell surface expression of the protein encoded by the specific allele, potentially offering therapeutic benefits in various conditions.
Furthermore, the patent describes additional steps that can be included in the method, such as contacting the blood cell with a second gRNA molecule targeting other genes, selecting the gRNA molecule using a database schema, and transferring the modified blood cell to a second subject with a different haplotype at the endogenous HLA gene. The method also allows for the integration of a transgene into the genome of the blood cell, which could encode an HLA gene, a chemotherapy selection marker, a cell surface antigen, or a suicide gene. The use of an enzymatically inactive Cas9 (eiCas9) molecule fused to a transcriptional repressor or activator is also mentioned as part of the method. Overall, this patented method provides a detailed framework for manipulating gene expression in blood cells, potentially opening up new avenues for personalized medicine and therapeutic interventions.
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