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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Cell+Mol+Med
2018 ; 22
(3
): 1816-1825
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H3 relaxin inhibits the collagen synthesis via ROS- and P2X7R-mediated NLRP3
inflammasome activation in cardiac fibroblasts under high glucose
#MMPMID29314607
Zhang X
; Fu Y
; Li H
; Shen L
; Chang Q
; Pan L
; Hong S
; Yin X
J Cell Mol Med
2018[Mar]; 22
(3
): 1816-1825
PMID29314607
show ga
Excessive production of reactive oxygen species (ROS) and P2X7R activation
induced by high glucose increases NLRP3 inflammasome activation, which
contributes to the pathogenesis of diabetic cardiomyopathy. Although H3 relaxin
has been shown to inhibit cardiac fibrosis induced by isoproterenol, the
mechanism has not been well studied. Here, we demonstrated that high glucose (HG)
induced the collagen synthesis by activation of the NLRP3 inflammasome, leading
to caspase-1 activation, interleukin-1? (IL-1?) and IL-18 secretion in neonatal
rat cardiac fibroblasts. Moreover, we used a high-glucose model with neonatal rat
cardiac fibroblasts and showed that the activation of ROS and P2X7R was augmented
and that ROS- and P2X7R-mediated NLRP3 inflammasome activation was critical for
the collagen synthesis. Inhibition of ROS and P2X7R decreased NLRP3
inflammasome-mediated collagen synthesis, similar to the effects of H3 relaxin.
Furthermore, H3 relaxin reduced the collagen synthesis via ROS- and
P2X7R-mediated NLRP3 inflammasome activation in response to HG. These results
provide a mechanism by which H3 relaxin alleviates NLRP3 inflammasome-mediated
collagen synthesis?through the inhibition of ROS and P2X7R under HG conditions
and suggest that H3 relaxin represents a potential drug for alleviating cardiac
fibrosis in diabetic cardiomyopathy.