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2015 ; 5
(ä): 16226
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Green tea inhibited the elimination of nephro-cardiovascular toxins and
deteriorated the renal function in rats with renal failure
#MMPMID26552961
Peng YH
; Sweet DH
; Lin SP
; Yu CP
; Lee Chao PD
; Hou YC
Sci Rep
2015[Nov]; 5
(ä): 16226
PMID26552961
show ga
Chronic kidney disease (CKD) is a major health problem worldwide. Indoxyl sulfate
(IS) and p-cresyl sulfate (PCS) are highly protein-bound nephro-cardiovascular
toxins, which are not efficiently removed through hemodialysis. The renal
excretions of IS and PCS were mediated by organic anion transporters (OATs) such
as OAT1 and OAT3. Green tea (GT) is a popular beverage containing plenty of
catechins. Previous pharmacokinetic studies of teas have shown that the major
molecules present in the bloodstream are the glucuronides/sulfates of tea
catechins, which are putative substrates of OATs. Here we demonstrated that GT
ingestion significantly elevated the systemic exposures of endogenous IS and PCS
in rats with chronic renal failure (CRF). More importantly, GT also significantly
increased the levels of serum creatinine (Cr) and blood urea nitrogen (BUN) in
CRF rats. Mechanism studies indicated that the serum metabolites of GT (GTM)
inhibited the uptake transporting functions of OAT1 and OAT3. In conclusion, GT
inhibited the elimination of nephro-cardiovascular toxins such as IS and PCS, and
deteriorated the renal function in CRF rats.
|Adenine/pharmacology
[MESH]
|Animals
[MESH]
|CHO Cells
[MESH]
|Catechin/analysis/pharmacology
[MESH]
|Creatinine/blood
[MESH]
|Cresols/blood/pharmacokinetics
[MESH]
|Cricetinae
[MESH]
|Cricetulus
[MESH]
|Disease Models, Animal
[MESH]
|Glucuronides/chemistry
[MESH]
|HEK293 Cells
[MESH]
|Humans
[MESH]
|Indican/blood/pharmacokinetics
[MESH]
|Kidney/drug effects/metabolism
[MESH]
|Male
[MESH]
|Organic Anion Transport Protein 1/genetics/metabolism
[MESH]