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  • Title: Enzyme replacement and other biochemical approaches to the therapy of adenosine deaminase deficiency.
    Author: Polmar SH.
    Journal: Ciba Found Symp; 1978; (68):213-30. PubMed ID: 227649.
    Abstract:
    Addition of adenosine deaminase (ADA) restored in vitro responses of lymphocytes from a patient with ADA deficiency and severe combined immunodeficiency (SCID). Enzyme replacement therapy, using red blood cells as a source of encapsulated human ADA, restored both T and B cell function in this patient. Ten other ADA--SCID patients have been treated with this form of enzyme replacement and five have responded to therapy. Lymphocytes from ADA--SCID patients treated with enzyme replacement become immunocompetent but remain enzyme deficient. Studies of these cells provide evidence supporting both cyclic AMP- and dATP-mediated immunosuppressive mechanisms in ADA--SCID. These observations suggest that inhibition of cyclic AMP synthesis and/or deoxycytidine (and possibly thymidine) supplementation may be useful new biochemical approaches to the therapy of ADA--SCID.
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