Journal
AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY
Volume 302, Issue 4, Pages H973-H982Publisher
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/ajpheart.00735.2011
Keywords
coronary circulation; microcirculation; tissue engineering; adipose; contractile function
Funding
- National Institute of Biomedical Imaging and Bioengineering [EB-007556]
- Gheens Foundation
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LeBlanc AJ, Touroo JS, Hoying JB, Williams SK. Adipose stromal vascular fraction cell construct sustains coronary microvascular function after acute myocardial infarction. Am J Physiol Heart Circ Physiol 302: H973-H982, 2012. First published December 2, 2011; doi:10.1152/ajpheart.00735.2011.-A three-dimensional tissue construct was created using adipose-derived stromal vascular fraction (SVF) cells and evaluated as a microvascular protection treatment in a myocardial infarction (MI) model. This study evaluated coronary blood flow (BF) and global left ventricular function after MI with and without the SVF construct. Fischer-344 rats were separated into four groups: sham operation (sham), MI, MI Vicryl patch (no cells), and MI SVF construct (MI SVF). SVF cells were labeled with green fluorescent protein (GFP). Immediately postinfarct, constructs were implanted onto the epicardium at the site of ischemia. Four weeks postsurgery, the coronary BF reserve was significantly decreased by 67% in the MI group and 75% in the MI Vicryl group compared with the sham group. The coronary BF reserve of the sham and MI SVF groups in the area at risk was not significantly different (sham group: 83 +/- 22% and MI SVF group: 57 +/- 22%). Griffonia simplicifolia I and GFP-positive SVF immunostaining revealed engrafted SVF cells around microvessels in the infarct region 4 wk postimplant. Overall heart function, specifically ejection fraction, was significantly greater in MI SVF hearts compared with MI and MI Vicryl hearts (MI SVF: 66 +/- 4%, MI: 37 +/- 8%, and MI Vicryl: 29 +/- 6%). In conclusion, adipose-derived SVF cells can be used to construct a novel therapeutic modality for treating microvascular instability and ischemia through implantation on the epicardial surface of the heart. The SVF construct implanted immediately after MI not only maintains heart function but also sustains microvascular perfusion and function in the infarct area by sustaining the coronary BF reserve.
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