title: Decreased retinol-binding protein 4 in the sera of patients with end-stage renal disease after kidney transplantation.
abstract: Retinol-binding protein 4 (RBP4) is a novel adipokine that has been associated with insulin resistance and type 2 diabetes. Patients with end-stage renal disease (ESRD) have very high serum RBP4 levels. However, whether successful kidney transplantation alleviates these elevated serum RBP4 levels is unclear. The serum RBP4 levels of 24 ESRD patients were determined before transplantation and at 1 day, 1 week, and 1 month after kidney transplantation. The control group included 22 healthy subjects. Serum RBP4 concentrations were measured using a commercial kit via the immunologic turbidimetric method, and were related to biomarkers for renal and liver function. The serum RBP4 level of ESRD patients before kidney transplantation (160.8 ± 29.1 mg/L) was approximately 7-fold higher than that of normal controls (22.6 ± 11.0 mg/L; P = 0.000). The serum RBP4 level before transplantation was significantly higher than that at 1 day (65.3 ± 28.4 mg/L), 1 week (48.3 ± 22.9 mg/L), and 1 month after transplantation (53.1 ± 25.5 mg/L; P = 0.000). However, these values were still higher than those of controls (P = 0.000). Univariate regression analysis showed that the percent changes in serum RBP4 concentration before and after kidney transplantation were positively correlated with serum creatinine, blood urea nitrogen, phosphate, and pre-albumin concentrations and negatively correlated with the estimated glomerular filtration rate. The serum RBP4 concentration of patients with ESRD decreased significantly after kidney transplantation; therefore, we found that serum RBP4 concentration was related to renal function.
authors.affiliation: Department of Nephrology, PLA 309th Hospital, Beijing, China.
authors.forename: W X
authors.initials: WX
authors.lastname: Zhang
authors.affiliation: Department of Nephrology, PLA 309th Hospital, Beijing, China.
authors.forename: W
authors.initials: W
authors.lastname: Zhou
authors.affiliation: Department of Nephrology, PLA 309th Hospital, Beijing, China.
authors.forename: Z M
authors.initials: ZM
authors.lastname: Zhang
authors.affiliation: Department of Nephrology, PLA 309th Hospital, Beijing, China.
authors.forename: Z Q
authors.initials: ZQ
authors.lastname: Zhang
authors.affiliation: Department of Laboratory Test, PLA 309th Hospital, Beijing, China.
authors.forename: J F
authors.initials: JF
authors.lastname: He
authors.affiliation: PLA Institute of Transplantation, PLA 309th Hospital, Beijing, China bingyishi@yeah.net.
authors.forename: B Y
authors.initials: BY
authors.lastname: Shi
mesh_terms: D000293:Adolescent; D000328:Adult; D015415:Biomarkers / Q000097:blood; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D007676:Kidney Failure, Chronic / Q000097:blood* / Q000503:physiopathology / Q000628:therapy; D007677:Kidney Function Tests; D016030:Kidney Transplantation; D008297:Male; D008875:Middle Aged; D054839:Retinol-Binding Proteins, Plasma / Q000378:metabolism*; D055815:Young Adult
chemical_list: D015415:Biomarkers; C101326:RBP4 protein, human; D054839:Retinol-Binding Proteins, Plasma