Role of neuropeptide Y and peroxisome proliferator-activated receptor γ coactivator-1α in stress cardiomyopathy

  • Sunnassee Ananda (阿兰达)
  • Yunyun Wang (王云云)
  • Shaohua Zhu (朱少华)
  • Rongshuai Wang (王荣帅)
  • Xiaowei Zhou (周小伟)
  • Luo Zhuo (卓 荦)
  • Tingyi Sun (孙婷怡)
  • Liang Ren (任 亮)
  • Qian Liu (刘 茜)
  • Hongmei Dong (董红梅)
  • Yan Liu (刘 艳)
  • Liang Liu (刘 良)
Article

DOI: 10.1007/s11596-012-1041-3

Cite this article as:
Ananda, S., Wang, Y., Zhu, S. et al. J. Huazhong Univ. Sci. Technol. [Med. Sci.] (2012) 32: 823. doi:10.1007/s11596-012-1041-3

Summary

Death following situations of intense emotional stress has been linked to the cardiac pathology described as stress cardiomyopathy, whose pathomechanism is still not clear. In this study, we sought to determine, via an animal model, whether the transcriptional coactivator peroxisome proliferator-activated receptor γ coactivator-1alpha (PGC-1α) and the amino peptide neuropeptide Y (NPY) play a role in the pathogenesis of this cardiac entity. Male Sprague-Dawley rats in the experimental group were subjected to immobilization in a plexy glass box for 1 h, which was followed by low voltage electric foot shock for about 1 h at 10 s intervals in a cage fitted with metallic rods. After 25 days the rats were sacrificed and sections of their hearts were processed. Hematoxylin-eosin staining of cardiac tissues revealed the characteristic cardiac lesions of stress cardiomyopathy such as contraction band necrosis, inflammatory cell infiltration and fibrosis. The semi-quantitative RT-PCR analysis for PGC-1α mRNA expression showed significant overexpression of PGC1-α in the stress-subjected rats (P<0.05). Fluorescence immunohistochemistry revealed a higher production of NPY in the stress-subjected rats as compared to the control rats (P=0.0027). Thus, we are led to conclude that following periods of intense stress, an increased expression of PGC1-α in the heart and an overflow of NPY may lead to stress cardiomyopathy and even death in susceptible victims. Moreover, these markers can be used to identify stress cardiomyopathy as the cause of sudden death in specific cases.

Key words

stress cardiomyopathy peroxisome proliferator-activated receptor γ coactivator-1alpha neuropeptide Y sudden death forensic pathology 
Download to read the full article text

Copyright information

© Huazhong University of Science and Technology and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Sunnassee Ananda (阿兰达)
    • 1
  • Yunyun Wang (王云云)
    • 1
  • Shaohua Zhu (朱少华)
    • 1
  • Rongshuai Wang (王荣帅)
    • 1
  • Xiaowei Zhou (周小伟)
    • 1
  • Luo Zhuo (卓 荦)
    • 1
  • Tingyi Sun (孙婷怡)
    • 1
  • Liang Ren (任 亮)
    • 1
  • Qian Liu (刘 茜)
    • 1
  • Hongmei Dong (董红梅)
    • 1
  • Yan Liu (刘 艳)
    • 1
  • Liang Liu (刘 良)
    • 1
  1. 1.Department of Forensic Medicine, Tongji Medical CollegeHuazhong University of Science and TechnologyWuhanChina

Personalised recommendations