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2017 ; 7
(1
): 10924
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GYY4137, a Hydrogen Sulfide Donor Modulates miR194-Dependent Collagen Realignment
in Diabetic Kidney
#MMPMID28883608
John AMSP
; Kundu S
; Pushpakumar S
; Fordham M
; Weber G
; Mukhopadhyay M
; Sen U
Sci Rep
2017[Sep]; 7
(1
): 10924
PMID28883608
show ga
The relationship between hydrogen sulfide (H(2)S), microRNAs (miRs), matrix
metalloproteinases (MMPs) and poly-ADP-ribose-polymerase-1 (PARP-1) in diabetic
kidney remodeling remains mostly obscured. We aimed at investigating whether
alteration of miR-194-dependent MMPs and PARP-1 causes renal fibrosis in diabetes
kidney, and whether H(2)S ameliorates fibrosis. Wild type, diabetic Akita mice as
well as mouse glomerular endothelial cells (MGECs) were used as experimental
models, and GYY4137 as H(2)S donor. In diabetic mice, plasma H(2)S levels were
decreased while ROS and expression of its modulator (ROMO1) were increased. In
addition, alteration of MMPs-9, -13 and -14 expression, PARP-1, HIF1?, and
increased collagen biosynthesis as well as collagen cross-linking protein, P4HA1
and PLOD2 were observed along with diminished vascular density in diabetic
kidney. These changes were ameliorated by GYY4137. Further, downregulated
miRNA-194 was normalized by GYY4137 in diabetic kidney. Similar results were
obtained in in vitro condition. Interestingly, miR-194 mimic also diminished ROS
production, and normalized ROMO1, MMPs-9, -13 and -14, and PARP-1 along with
collagen biosynthesis and cross-linking protein in HG condition. We conclude that
decrease H(2)S diminishes miR-194, induces collagen deposition and realignment
leading to fibrosis and renovascular constriction in diabetes. GYY4137 mitigates
renal fibrosis in diabetes through miR-194-dependent pathway.