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In three Phase I/II trials an experimental gene therapy caused all but two patients with severe combined immunodeficiency to acquire and retain robust immune function for more than two years.
ADA-SCID is a rare, life-threatening, inherited disease caused by mutations in the ADA gene. Deficiencies of the ADA enzyme leads to dysfunction of cells of the immune system, including B, T and natural killer cells.
Biotechnology company Orchard Therapeutics’ OTL-101 has received a promising innovative medicine designation from the UK Medicines and Healthcare Products Regulatory Agency (MHRA) for the treatment of adenosine deaminase severe combined immunodeficiency.