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学科主题: 基础医学
题名:
Intermedin(1-53) protects against cardiac hypertrophy by inhibiting endoplasmic reticulum stress via activating AMP-activated protein kinase
作者: Lu, Wei-Wei1,3; Zhao, Lei1,2; Zhang, Jin-Sheng1,3; Hou, Yue-Long3; Yu, Yan-Rong3; Jia, Mo-Zhi3; Tang, Chao-Shu1,2; Qi, Yong-Fen1,2,3
刊名: JOURNAL OF HYPERTENSION
发表日期: 2015-08-01
DOI: 10.1097/HJH.0000000000000597
卷: 33, 期:8, 页:1676-1687
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Peripheral Vascular Disease
研究领域[WOS]: Cardiovascular System & Cardiology
关键词[WOS]: SPONTANEOUSLY HYPERTENSIVE-RATS ; COUNTER-REGULATORY PEPTIDE ; PRESSURE-OVERLOAD ; THERAPEUTIC TARGET ; OXIDATIVE STRESS ; CELL-DEATH ; HEART ; EXPRESSION ; DISEASE ; INJURY
英文摘要:

Objective:

Intermedin (IMD), a novel member of the calcitonin/calcitonin gene-related peptide family, is involved in maintaining circulatory homeostasis and is a protective factor of heart and vessel. Here, we investigated the effects of IMD on cardiac hypertrophy in vivo and in vitro and explored the mechanisms involved.

Methods and results:

IMD1-53 (100 ng/kg/h) was systemically administered to rats with cardiac hypertrophy induced by abdominal aortic constriction (AAC) by a mini-osmotic pump the next day after surgery continuously for 4 weeks. The AAC-treated rats before IMD infusion showed increased IMD content and expression of its receptors in the hearts. In-vivo administration of IMD1-53 greatly attenuated the cardiac hypertrophy as shown by heart weight to body weight ratio (HW/BW), haemodynamics, echocardiography, histological analyses and expression of hypertrophic markers atrial natriuretic peptide (ANP) and brain natriuretic peptide (BNP) induced by AAC. IMD1-53 treatment significantly reduced the myocardial protein expression of endoplasmic reticulum stress (ERS) markers such as glucose-regulated protein 78 (GRP78), CCAAT/enhancer binding protein homologous protein (CHOP) and caspase-12, whereas the protein level of phosphorylated AMP-activated protein kinase (p-AMPK) was upregulated with IMD1-53 treatment, which was further confirmed in cultured cardiomyocytes. Concurrently, cardiomyocyte apoptosis in vivo and in vitro was ameliorated by IMD1-53 treatment. The inhibitory effects of IMD1-53 on ERS and apoptosis were eliminated on pretreatment with compound C, an AMPK inhibitor.

Conclusion:

IMD1-53 could exert its cardioprotective effect on cardiac hypertrophy by inhibiting myocardial ERS and apoptosis, possibly via activation of AMPK signalling.

语种: 英语
所属项目编号: 91339203 ; 81170082 ; 81270407
项目资助者: National Natural Sciences Foundation of China ; Collaborative Innovation Center for Cardiovascular Disorders
WOS记录号: WOS:000360853900026
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.bjmu.edu.cn/handle/400002259/57548
Appears in Collections:基础医学院_期刊论文

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作者单位: 1.Minist Educ, Key Lab Mol Cardiovasc Sci, Beijing, Peoples R China
2.Peking Univ, Sch Basic Med Sci, Lab Cardiovasc Bioact Mol, Beijing 100871, Peoples R China
3.Peking Univ, Hlth Sci Ctr, Sch Basic Med Sci, Dept Pathogen Biol, Beijing 100871, Peoples R China

Recommended Citation:
Lu, Wei-Wei,Zhao, Lei,Zhang, Jin-Sheng,et al. Intermedin(1-53) protects against cardiac hypertrophy by inhibiting endoplasmic reticulum stress via activating AMP-activated protein kinase[J]. JOURNAL OF HYPERTENSION,2015,33(8):1676-1687.
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