title: Plasma glutathione peroxidase activity in kidney recipients with and without adverse outcome.
abstract: Kidney function is routinely monitored utilizing classic biochemical parameters including serum or plasma creatinine (Cr), and blood urea nitrogen (BUN) concentrations. This study demonstrates that the simultaneous assessment of plasma glutathione peroxidase (pGPx) and Cr levels provides a better strategy for the immediate follow-up of kidney function in organ recipients. Kidney recipients (Krs; n = 22) were recruited. Blood sampling schedule commenced at day 1 (pre-transplantation) and post-transplantation days (i.e., everyday from 1 until day 14, and thereafter on days 21, 28, 35, 42, 49, and 56). pGPx was measured spectrophotometrically. Candidates for transplantation exhibited lower pGPx than control subjects (42 ± 24 vs. 143 ± 31 U/L; p < 0.005). In Krs with a stable post-transplant outcome, pGPx increased to a maximum at day 28 (214 ± 61 U/L). In a Kr diagnosed with acute tubulonecrosis, pGPx provided a better predictive value (threefold increase) than Cr. In a Kr diagnosed with acute rejection, the increment in Cr values was found to be more pronounced than in pGPx values. The pGPx test is simple, inexpensive and automatable, and should be a valuable diagnostic tool of kidney function in organ recipients with and without troublesome outcome for the follow-up during hospitalization period.
authors.affiliation: Department of Biochemistry, Shiraz University of Medical Sciences, Shiraz, Iran.
authors.forename: Ebrahim
authors.initials: E
authors.lastname: Eftekhar
authors.forename: Athie
authors.initials: A
authors.lastname: Hajirahimkhan
authors.forename: Ali
authors.initials: A
authors.lastname: Taghizadeh Afshari
authors.forename: Jaffar
authors.initials: J
authors.lastname: Nourooz-Zadeh
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood; D005500:Follow-Up Studies; D005979:Glutathione Peroxidase / Q000097:blood*; D006084:Graft Rejection / Q000097:blood / Q000175:diagnosis; D006801:Humans; D007676:Kidney Failure, Chronic / Q000201:enzymology* / Q000601:surgery; D016030:Kidney Transplantation / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012189:Retrospective Studies; D013053:Spectrophotometry
chemical_list: D015415:Biomarkers; D005979:Glutathione Peroxidase