title: Immunologic monitoring of OKT3 induction therapy in cardiac allograft recipients.
abstract: OKT3 induction therapy was monitored in 31 cardiac allograft recipients during the 1st year posttransplant. Serum level of OKT3, anti-OKT3 antibodies, and interleukin-2 (IL-2) were monitored during the first 2 months posttransplant. These values were retrospectively correlated with allograft rejection episodes which occurred during the 1st year posttransplant and allograft survival rates over a 3-year observation period. We found that OKT3 induction therapy (10-14 days) was not associated with the development of anti-OKT3 antibodies manifest by dropping OKT3 levels during OKT3 therapy, and is not associated with the development of vascular rejection in our patient population. Patients with high titer ant-OKT3 antibodies, erratic serum OKT3 levels, and/or high serum IL-2 levels (> or = 5 ng/ml) during the first 2 months posttransplant showed a higher incidence of allograft rejection (predominantly cellular rejection) during the 1st year posttransplant and showed lower allograft survival rates. We also showed that a concomitant elevation of serum IL-2 levels was found in patients who developed anti-OKT3 antibodies. CD3+ T-cell levels were not predictive of inefficacy of OKT3 therapy. We conclude that immunologic monitoring of serum OKT3, anti-OKT3 antibody, and possibly serum IL-2 levels is critical for identification of patients who develop early, OKT3-resistant rejection episodes and for the identification of patients who may be more susceptible to allograft rejection and decreased allograft survival long after completion of OKT3 therapy.
authors.affiliation: Transplant Immunology Laboratory, Ahmanson Pediatric Center, Steven Spielberg Pediatric Research Laboratories, Cedars-Sinai Medical Center/UCLA School of Medicine, USA.
authors.forename: M
authors.initials: M
authors.lastname: Toyoda
authors.forename: K
authors.initials: K
authors.lastname: Galfayan
authors.forename: K
authors.initials: K
authors.lastname: Wachs
authors.forename: L
authors.initials: L
authors.lastname: Czer
authors.forename: S C
authors.initials: SC
authors.lastname: Jordan
mesh_terms: D000888:Antibodies, Anti-Idiotypic / Q000032:analysis; D000917:Antibody Formation; D004699:Endocardium / Q000473:pathology; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006084:Graft Rejection / Q000276:immunology; D016027:Heart Transplantation / Q000276:immunology; D006801:Humans; D007166:Immunosuppressive Agents / Q000627:therapeutic use*; D007376:Interleukin-2 / Q000097:blood; D008297:Male; D016853:Muromonab-CD3 / Q000276:immunology / Q000627:therapeutic use*; D009500:Neutralization Tests; D011446:Prospective Studies
chemical_list: D000888:Antibodies, Anti-Idiotypic; D007166:Immunosuppressive Agents; D007376:Interleukin-2; D016853:Muromonab-CD3