title: Enzyme replacement therapy with polyethylene glycol-adenosine deaminase in adenosine deaminase deficiency: overview and case reports of three patients, including two now receiving gene therapy.
abstract: During the past 6 y, 29 adenosine deaminase (ADA)-deficient patients with combined immunodeficiency have been treated with polyethylene glycol (PEG)-modified bovine ADA (PEG-ADA). We have monitored plasma ADA activity, metabolic effects of treatment, and the evolution of antibody to PEG-ADA in these patients, in collaboration with immunologists and clinicians in North America, Europe, and Australia, who have monitored immune function and clinical response to treatment. This article summarizes the current status of PEG-ADA therapy and provides recommendations for its use. Recovery of specific immune function during treatment with PEG-ADA is illustrated for three patients, who represent early, delayed, these patients have entered a trial of gene therapy, but continue to receive enzyme replacement.
authors.affiliation: Department of Medicine, Duke University Medical Center, Durham, North Carolina 27710.
authors.forename: M S
authors.initials: MS
authors.lastname: Hershfield
authors.forename: S
authors.initials: S
authors.lastname: Chaffee
authors.forename: R U
authors.initials: RU
authors.lastname: Sorensen
mesh_terms: D000243:Adenosine Deaminase / Q000097:blood / Q000172:deficiency* / Q000627:therapeutic use*; D000917:Antibody Formation; D002648:Child; D002675:Child, Preschool; D005260:Female; D015316:Genetic Therapy; D006801:Humans; D007107:Immune System / Q000503:physiopathology; D007958:Leukocyte Count; D008213:Lymphocyte Activation; D016511:Severe Combined Immunodeficiency / Q000188:drug therapy* / Q000201:enzymology / Q000628:therapy
chemical_list: D000243:Adenosine Deaminase; C051409:pegademase bovine