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2016 ; 6
(ä): 23010
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Deletion of interleukin-6 alleviated interstitial fibrosis in
streptozotocin-induced diabetic cardiomyopathy of mice through affecting TGF?1
and miR-29 pathways
#MMPMID26972749
Zhang Y
; Wang JH
; Zhang YY
; Wang YZ
; Wang J
; Zhao Y
; Jin XX
; Xue GL
; Li PH
; Sun YL
; Huang QH
; Song XT
; Zhang ZR
; Gao X
; Yang BF
; Du ZM
; Pan ZW
Sci Rep
2016[Mar]; 6
(ä): 23010
PMID26972749
show ga
Interleukin 6 (IL-6) has been shown to be an important regulator of cardiac
interstitial fibrosis. In this study, we explored the role of interleukin-6 in
the development of diabetic cardiomyopathy and the underlying mechanisms. Cardiac
function of IL-6 knockout mice was significantly improved and interstitial
fibrosis was apparently alleviated in comparison with wildtype (WT) diabetic mice
induced by streptozotocin (STZ). Treatment with IL-6 significantly promoted the
proliferation and collagen production of cultured cardiac fibroblasts (CFs). High
glucose treatment increased collagen production, which were mitigated in CFs from
IL-6 KO mice. Moreover, IL-6 knockout alleviated the up-regulation of TGF?1 in
diabetic hearts of mice and cultured CFs treated with high glucose or IL-6.
Furthermore, the expression of miR-29 reduced upon IL-6 treatment, while
increased in IL-6 KO hearts. Overexpression of miR-29 blocked the pro-fibrotic
effects of IL-6 on cultured CFs. In summary, deletion of IL-6 is able to mitigate
myocardial fibrosis and improve cardiac function of diabetic mice. The mechanism
involves the regulation of IL-6 on TGF?1 and miR-29 pathway. This study indicates
the therapeutic potential of IL-6 suppression on diabetic cardiomyopathy disease
associated with fibrosis.