Elevated aldolase 1a, retrogene 1 expression induces cardiac apoptosis in rat experimental autoimmune myocarditis model

Seungmin Choi, Joo Hee Chung, Myung Hee Nam, Eunjung Bang, Kwan Soo Hong, Yong Hwan Kim, Jong Bok Seo, Sung Gil Chi

Research output: Contribution to journalArticle

Abstract

Acute myocarditis is an unpredictable heart disease that is caused by inflammation-associated cell death. Although viral infection and drug exposure are known to induce acute myocarditis, the molecular basis for its development remains undefined. Using proteomics and molecular analyses in myosin-induced rat experimental autoimmune myocarditis (EAM), we identified that elevated expression of aldolase 1A, retrogene 1 (Aldoart1) is critical to induce mitochondrial dysfunction and acute myocarditis development. Here, we demonstrate that cardiac cell death is associated with increased expressions of proapoptotic genes in addition to high levels of glucose, lactate, and triglyceride in metabolite profiling. The functional protein association network analysis also suggests that Aldoart1 upregulation correlates with high levels of dihydroxyacetone kinase and triglyceride. In H9c2 cardiac cells, lipopolysaccharides (LPS) or high glucose exposure significantly increases the cytochrome c release and the conversion of pro-caspase 3 into the cleaved form of caspase 3. We also found that LPS- or glucose-induced toxicities are almost completely reversed by siRNA-mediated knockdown of Aldoartl, which consequently increases cell viability. Together, our study strongly suggests that Aldoart1 may be involved in inducing mitochondrial apoptotic processes and can be a novel therapeutic target to prevent the onset of acute myocarditis or cardiac apoptosis.

Original languageEnglish
Pages (from-to)373-382
Number of pages10
JournalCanadian Journal of Physiology and Pharmacology
Volume98
Issue number6
DOIs
Publication statusPublished - 2020

Keywords

  • Aldoart1
  • Apoptosis
  • Experimental autoimmune myocarditis
  • H9c2
  • High glucose

ASJC Scopus subject areas

  • Physiology
  • Pharmacology
  • Physiology (medical)

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