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Life Sci. 2012 May 15;90(17-18):695-702. doi: 10.1016/j.lfs.2012.03.003. Epub 2012 Mar 24.

A targeted high-efficiency angiogenesis strategy as therapy for myocardial infarction.

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  • 1Department of Geriatrics, Southwest Hospital, the Third Military Medical University, Chongqing 400038, PR China.

Abstract

AIMS:

The aim of this study was to prove that an intramyocardial injection of a mixture of low-dose human growth factor (HGF) plasmid and microbubbles (MB) in combination with insonation was an effective therapy for myocardial infarction.

MAIN METHODS:

Twenty dogs with myocardial infarction were divided into 4 groups: (1) HGF, MB and ultrasound (HGF-US/MB), (2) HGF and US (HGF-US), (3) HGF alone and (4) surgery alone (control). In the HGF-US/MB group, HGF plasmid DNA (500 μg) mixed with 0.5 ml of MB solution was injected 5 min after coronary occlusion followed by insonation. With the exception of the control group, the other dogs were divided into two groups, one treated with the HGF gene and insonation and the other with the HGF gene only.

KEY FINDINGS:

Compared to the HGF group, infarct size decreased from 32%±7% (control) to 23%±5% in the HGF-US/MB group 28 d later (P<0.05). Capillary density increased from 21.7±4.2/mm(2) (control) to 114.3±28.9/mm(2) in the HGF-US/MB group (P<0.01). Compared to the HGF group, there was a 14% decrease in the ratio of left ventricle weight/body weight and a 25% decrease in hydroxyproline content. We also observed a 29% and 20% decrease in collagen volume fraction of type I and type III collagen, respectively in the HGF-US/MB group.

SIGNIFICANCE:

Intramyocardial injection of HGF and MB in combination with insonation enhances neovascularization and reduces ventricular remodeling and infarct size.

Copyright © 2012 Elsevier Inc. All rights reserved.

PMID:
22469972
[PubMed - indexed for MEDLINE]
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