Silencing MR-1 attenuates inflammatory damage in mice heart induced by AngII
- Institute of Medicinal Biotechnology, Chinese Academy of Medical Sciences, Key Lab of Antibiotic Biotechnology, Ministry of Health, Beijing 100050 (China)
- Hunan Environment-Biological Polytechnic College, Hengyang Hunan 421005 (China)
Myofibrillogenesis regulator-1(MR-1) can aggravate cardiac hypertrophy induced by angiotensin(Ang) II in mice through activation of NF-{kappa}B signaling pathway, and nuclear transcription factor (NF)-{kappa}B and activator protein-1(AP-1) regulate inflammatory and immune responses by increasing the expression of specific inflammatory genes in various tissues including heart. Whether inhibition of MR-1 expression will attenuate AngII-induced inflammatory injury in mice heart has not been explored. Herein, we monitored the activation of NF-{kappa}B and AP-1, together with expression of pro-inflammatory of interleukin(IL)-6, tumor necrosis factor(TNF)-{alpha}, vascular-cell adhesion molecule (VCAM)-1, platelet endothelial cell adhesion molecule (PECAM), and inflammatory cell infiltration in heart of mice which are induced firstly by AngII (PBS),then received MR-1-siRNA or control-siRNA injecting. We found that the activation of NF-{kappa}B and AP-1 was inhibited significantly, together with the decreased expression of IL-6, TNF-{alpha}, VCAM-1, and PECAM in AngII-induced mice myocardium in MR-1-siRNA injection groups compared with control-siRNA injecting groups. However, the expression level of MR-1 was not an apparent change in PBS-infused groups than in unoperation groups, and MR-1-siRNA do not affect the expression of MR-1 in PBS-infused mice. Our findings suggest that silencing MR-1 protected mice myocardium against inflammatory injury induced by AngII by suppression of pro-inflammatory transcription factors NF-{kappa}B and AP-1 signaling pathway.
- OSTI ID:
- 22202338
- Journal Information:
- Biochemical and Biophysical Research Communications, Vol. 391, Issue 3; Other Information: Copyright (c) 2009 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0006-291X
- Country of Publication:
- United States
- Language:
- English
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