Chronic renal failure(CRF)is a type of progressive chronic kidney disease with the alteration of substrates excretion.However,changes in renal excretion pathways remain unclear in CRF.This study aimed to evaluate the ...Chronic renal failure(CRF)is a type of progressive chronic kidney disease with the alteration of substrates excretion.However,changes in renal excretion pathways remain unclear in CRF.This study aimed to evaluate the changes in renal excretion pathways of exogenous and endogenous substrates in CRF rats.Results showed that the levels of cystatin C,creatinine,and urea nitrogen were dramatically increased in the adenine(50 or 100 mg/kg)-induced CRF rats.The levels of rOCT2 were dose-dependently up-regulated by adenine,and rMRP2 and rMATE1 levels were dose-dependently down-regulated,while rMRP4 was induced by adenine(50).Plasma concentrations of metformin,p-aminohippurate,and furosemide in the adenine(100)group were significantly increased compared with the control group.However,plasma concentrations of metformin and p-aminohippurate were slightly changed in the adenine(50)group.Consistently,urinary excretions of metformin and p-aminohippurate were unaffected.In addition,renal N1-methylnicotinamide uptakes were increased in rats treated with adenine,and renal phenyl-β-D-glucuronide and hippuric acid uptakes were induced by adenine(50).These results showed that adenine(100)-induced CRF caused the reduced function of GFR-r OCTs-r MATE1 and GFR-r OAT1/r OAT3-r MRP pathway,and oppositely the renal tubular transport pathways of rOCTs-r MATE1 and rOAT1-MRPs were induced in rats with the treatment of adenine(50).展开更多
基金The National Natural Science Foundation of China(Grant No.81803611)Innovation and Entrepreneurship Project of the First Clinical Medical College of Lanzhou University(Grant No.20190060133)。
文摘Chronic renal failure(CRF)is a type of progressive chronic kidney disease with the alteration of substrates excretion.However,changes in renal excretion pathways remain unclear in CRF.This study aimed to evaluate the changes in renal excretion pathways of exogenous and endogenous substrates in CRF rats.Results showed that the levels of cystatin C,creatinine,and urea nitrogen were dramatically increased in the adenine(50 or 100 mg/kg)-induced CRF rats.The levels of rOCT2 were dose-dependently up-regulated by adenine,and rMRP2 and rMATE1 levels were dose-dependently down-regulated,while rMRP4 was induced by adenine(50).Plasma concentrations of metformin,p-aminohippurate,and furosemide in the adenine(100)group were significantly increased compared with the control group.However,plasma concentrations of metformin and p-aminohippurate were slightly changed in the adenine(50)group.Consistently,urinary excretions of metformin and p-aminohippurate were unaffected.In addition,renal N1-methylnicotinamide uptakes were increased in rats treated with adenine,and renal phenyl-β-D-glucuronide and hippuric acid uptakes were induced by adenine(50).These results showed that adenine(100)-induced CRF caused the reduced function of GFR-r OCTs-r MATE1 and GFR-r OAT1/r OAT3-r MRP pathway,and oppositely the renal tubular transport pathways of rOCTs-r MATE1 and rOAT1-MRPs were induced in rats with the treatment of adenine(50).
