Intramyocardial injection of naked DNA encoding HIF-1α/VP16 hybrid to enhance angiogenesis in an acute myocardial infarction model in the rat

Kou Gi Shyu, Mei Ti Wang, Bao Wei Wang, Chih Chuna Chang, Jyh Gang Leu, Peiliang Kuan, Hang Chang

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159 Citations (Scopus)

Abstract

Objectives: The therapeutic utility of hypoxia-inducible factor-1 (HIF-1) transcriptional regulatory system for ischemic hindlimb has been demonstrated. It is not yet known whether this transcriptional regulatory system can be used as a therapeutic strategy to enhance collateral vessel formation in myocardial tissues, where acute hypoxia occurs due to inadequate perfusion. We aimed to test the hypothesis that exogenous administration of HIF-1α/VP16 could enhance collateral vessel formation in a rat acute myocardial infarction model. Methods: Sprague-Dawley rats received ligation of the proximal left anterior descending coronary artery to induce acute myocardial infarction. Immediately after the ligation, 50 μg total plasmid DNA (control, plasmid encoding human vascular endothelial growth factor (pVEGF165), or pHIF-1α/VP16) was injected into the infarct area at three locations. Results: Reverse transcription-polymerase chain reaction (RT-PCR) showed the presence of HIF-1α and VEGF mRNA in the myocardium, but not in other organs at days 3 and 7. The infarct size significantly decreased from 37±4% (control) to 24±2% in the VEGF-treated group and 23±2% in the HIF-1α/VP16 treated group (P2 (control) to 850±75/mm2 in the VEGF group and 850±50/mm2 in the HIF-1α/VP16-treated group (P2) than treatment with either therapy alone. Regional myocardial blood flow was also higher in the treated groups than in the control. Plasma levels of VEGF were also significantly higher in the HIF-1α/VP16 and VEGF-treated group than in the control group. Conclusions: The HIF-1α/VP16 hybrid transcription factor is able to reduce infarct size and enhance neovascularization in an acute ischemic myocardium. The potency of VEGF and HIF-1α/VP16 hybrid as therapeutic angiogenic factors in acute hypoxic myocardium is similar.

Original languageEnglish
Pages (from-to)576-583
Number of pages8
JournalCardiovascular Research
Volume54
Issue number3
DOIs
Publication statusPublished - 2002
Externally publishedYes

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Keywords

  • Angiogenesis
  • Collateral circulation
  • Gene therapy
  • Infarction

ASJC Scopus subject areas

  • Cardiology and Cardiovascular Medicine

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