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2015 ; 2
(ä): 121-129
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Reduced kidney levels of lysophosphatidic acids in rats after chronic
administration of aristolochic acid: Its possible protective role in renal
fibrosis
#MMPMID28962344
Tsutsumi T
; Yamakawa S
; Ishihara A
; Yamamoto A
; Tanaka T
; Tokumura A
Toxicol Rep
2015[]; 2
(ä): 121-129
PMID28962344
show ga
Aristolochic acid (AA) is considered to be a causative agent for progressive
interstitial renal fibrosis, leading to AA nephropathy. Lysophosphatidic acid
(LPA) is a mediator in the onset of renal fibrosis. In this study, we analyzed
the molecular species of LPA and its precursor lysophospholipids in kidney tissue
from rats exposed to AA. Daily intraperitoneal injections of AA for 35 days to
rats gave rise to fibrosis in kidney, decreased the kidney levels of LPA,
lysophosphatidylserine and lysophosphatidylinositol. In rat renal cell lines
(NRK52E and NRK49F), AA-induced cytotoxicity was potentiated by Ki16425, LPA(1,3)
receptor antagonist. The level of mRNA encording ?-smooth muscle actin was
significantly increased by AA-treatment only in NRK52E cells, while the mRNA
level of collagen III was decreased in both NRK52E and NRK49F cells. These
results suggest that endogenous LPA in rat kidney prevents AA-induced renal
fibrosis.