title: [Calreticulin-induced mitochondrial injury: a novel mechanism of cardiac hypertrophy].
abstract: OBJECTIVE
  To observe the effect of angiotensin II (Ang II) on calreticulin (CRT) expression and its association with mitochondrial dysfunction in cardiomyocytes.
  
  
  METHODS
  Primary neonatal rat cardiomyocytes were randomly divided into CRT siRNA group, control siRNA group, control group, Ang II+ CRT siRNA group, Ang II+ control siRNA group and Ang II group. The cell surface area, protein synthesis rate, mitochondrial membrane potential level, enzyme activities, and CRT expression were observed.
  
  
  RESULTS
  Compared with those in the control group, the cell surface area and protein synthesis rate were both increased and mitochondrial membrane potential level and enzyme activities decreased in Ang II groups. CRT expression was significantly down-regulated in Ang II+ CRT siRNA group with increased cell surface area, protein synthesis rate, mitochondrial membrane potential level and enzyme activities as compared with those in Ang II+ control siRNA group.
  
  
  CONCLUSIONS
  Ang II up-regulates CRT expression to induce mitochondrial injury, which may be an important mechanism of myocardial hypertrophy.
authors.affiliation: Department of Cardiology, Second Affiliated Hospital, Xi'an Jiaotong University College of Medicine, Xi'an 710004, China. E-mail: yaosha1860@stu.xjtu.edu.cn.
authors.forename: Hu
authors.initials: H
authors.lastname: Shan
authors.forename: Jin
authors.initials: J
authors.lastname: Wei
authors.forename: Ming
authors.initials: M
authors.lastname: Zhang
authors.forename: Rui
authors.initials: R
authors.lastname: Yan
authors.forename: Lin
authors.initials: L
authors.lastname: Lin
authors.forename: Rong
authors.initials: R
authors.lastname: Zhang
authors.forename: Yanhe
authors.initials: Y
authors.lastname: Zhu
authors.forename: Wuhong
authors.initials: W
authors.lastname: Tan
mesh_terms: D000804:Angiotensin II / Q000494:pharmacology*; D000818:Animals; D037282:Calreticulin / Q000378:metabolism*; D006332:Cardiomegaly; D002478:Cells, Cultured; D053078:Membrane Potential, Mitochondrial; D008928:Mitochondria / Q000473:pathology*; D032383:Myocytes, Cardiac / Q000473:pathology*; D014176:Protein Biosynthesis; D034741:RNA, Small Interfering; D051381:Rats
chemical_list: D037282:Calreticulin; D034741:RNA, Small Interfering; D000804:Angiotensin II