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2016 ; 4
(6
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
High glucose induces platelet-derived growth factor-C via carbohydrate response
element-binding protein in glomerular mesangial cells
#MMPMID27033449
Kitsunai H
; Makino Y
; Sakagami H
; Mizumoto K
; Yanagimachi T
; Atageldiyeva K
; Takeda Y
; Fujita Y
; Abiko A
; Takiyama Y
; Haneda M
Physiol Rep
2016[Mar]; 4
(6
): ä PMID27033449
show ga
Persistent high concentration of glucose causes cellular stress and damage in
diabetes via derangement of gene expressions. We previously reported high glucose
activates hypoxia-inducible factor-1?and downstream gene expression in mesangial
cells, leading to an extracellular matrix expansion in the glomeruli. A
glucose-responsive transcription factor carbohydrate response element-binding
protein (ChREBP) is a key mediator for such perturbation of gene regulation. To
provide insight into glucose-mediated gene regulation in mesangial cells, we
performed chromatin immunoprecipitation followed byDNAmicroarray analysis and
identified platelet-derived growth factor-C (PDGF-C) as a novel target gene of
ChREBP In streptozotocin-induced diabetic mice, glomerular cells showed a
significant increase inPDGF-C expression; the ratio ofPDGF-C-positive cells to
the total number glomerular cells demonstrated more than threefold increase when
compared with control animals. In cultured human mesangial cells, high glucose
enhanced expression ofPDGF-C protein by 1.9-fold. Knock-down of ChREBPabrogated
this induction response. UpregulatedPDGF-C contributed to the production of
typeIVand typeVIcollagen, possibly via an autocrine mechanism. Interestingly,
urinaryPDGF-C levels in diabetic model mice were significantly elevated in a
fashion similar to urinary albumin. Taken together, we hypothesize that a high
glucose-mediated induction ofPDGF-C via ChREBPin mesangial cells contributes to
the development of glomerular mesangial expansion in diabetes, which may provide
a platform for novel predictive and therapeutic strategies for diabetic
nephropathy.