alexa Gene therapy for severe combined immunodeficiencies.
Genetics & Molecular Biology

Genetics & Molecular Biology

Journal of Stem Cell Research & Therapy

Author(s): Gaspar HB, Thrasher AJ

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Abstract Severe combined immune deficiencies (SCIDs) are a group of monogenic diseases resulting in profound disturbances of lymphocyte development and function. Affected individuals are prone to life-threatening infections and without treatment do not survive beyond the first year of life. Haematopoietic stem cell transplantation from a well-matched donor offers high rates of survival, but in the absence of a suitable matched donor, parental haploidentical transplants are associated with greater complications, lower success rates and in some instances poor long-term immune recovery. Alternative therapeutic options based on correction of the defective gene by retroviral gene delivery have been used to correct X-linked SCID (SCID-X1) and adenosine deaminase-deficient SCID (ADA-SCID). A number of clinical trials have established that ex vivo gene transfer into haematopoietic progenitor cells allows effective recovery of immune defects and that gene therapy can offer a successful alternative to transplantation. The development of leukaemia as a result of insertional mutagenesis in one trial of gene therapy for SCID-X1 has raised concerns regarding the toxicity of retroviral vector-based gene delivery. These side effects are now being studied in detail and measures to prevent such events through alternative vectors delivery systems are in development at present. This article was published in Expert Opin Biol Ther and referenced in Journal of Stem Cell Research & Therapy

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