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  • Title: Eosinophil granule major basic protein in acute renal allograft rejection.
    Author: Ten RM, Gleich GJ, Holley KE, Perkins JD, Torres VE.
    Journal: Transplantation; 1989 Jun; 47(6):959-63. PubMed ID: 2660359.
    Abstract:
    Conventional staining techniques to determine the presence of tissue eosinophils underestimate their number and do not usually detect eosinophil degranulation. We have studied the involvement of eosinophils in acute renal allograft rejection by immunofluorescence localization of eosinophil granule major basic protein (MBP) in the kidney and by measurement of MBP in the plasma and urine by radioimmunoassay. Tissue eosinophilia and extracellular deposition of MBP indicative of eosinophil degranulation were observed in 94% and 87%, respectively, of patients with acute rejection as compared with 17% and 17%, respectively, of patients with cyclosporine nephrotoxicity. The urine levels of MBP were significantly elevated in acute rejection but not in cyclosporine nephrotoxicity. Plasma MBP concentrations were within the normal range in both acute rejection and cyclosporine nephrotoxicity. The presence of marked tissue eosinophilia and eosinophil degranulation did not always indicate irreversible rejection. Interleukin-2 and IL-2 receptors were also elevated in the urine during acute rejection. These results support a role for the eosinophil as an effector of tissue damage during rejection and suggest the potential usefulness of urine MBP determinations for the immunologic monitoring of transplanted patients.
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