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Pharmaceuticals 2014, 7(4), 419-432; doi:10.3390/ph7040419
Article

The Impact of Lipoproteins on Wound Healing: Topical HDL Therapy Corrects Delayed Wound Healing in Apolipoprotein E Deficient Mice

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Molecular and Vascular Biology, Department of Cardiovascular Sciences, Katholieke Universiteit Leuven, Campus Gasthuisberg, Herestraat 49, bus 911, Leuven 3000, Belgium
* Author to whom correspondence should be addressed.
Received: 13 January 2014 / Revised: 6 March 2014 / Accepted: 26 March 2014 / Published: 3 April 2014
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Abstract

Chronic non-healing wounds lead to considerable morbidity and mortality. Pleiotropic effects of high density lipoproteins (HDL) may beneficially affect wound healing. The objectives of this murine study were: (1) to investigate the hypothesis that hypercholesterolemia induces impaired wound healing and (2) to study the effect of topical HDL administration in a model of delayed wound healing. A circular full thickness wound was created on the back of each mouse. A silicone splint was used to counteract wound contraction. Coverage of the wound by granulation tissue and by epithelium was quantified every 2 days. Re-epithelialization from day 0 till day 10 was unexpectedly increased by 21.3% (p < 0.05) in C57BL/6 low density lipoprotein (LDLr) deficient mice with severe hypercholesterolemia (489 ± 14 mg/dL) compared to C57BL/6 mice and this effect was entirely abrogated following cholesterol lowering adenoviral LDLr gene transfer. In contrast, re-epithelialization in hypercholesterolemic (434 ± 16 mg/dL) C57BL/6 apolipoprotein (apo) E−/− mice was 22.6% (p < 0.0001) lower than in C57BL/6 mice. Topical HDL gel administered every 2 days increased re-epithelialization by 25.7% (p < 0.01) in apo E−/− mice. In conclusion, topical HDL application is an innovative therapeutic strategy that corrects impaired wound healing in apo E−/− mice.
Keywords: hypercholesterolemia; high density lipoproteins; LDL receptor gene transfer; wound healing; topical therapy hypercholesterolemia; high density lipoproteins; LDL receptor gene transfer; wound healing; topical therapy
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
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Gordts, S.C.; Muthuramu, I.; Amin, R.; Jacobs, F.; De Geest, B. The Impact of Lipoproteins on Wound Healing: Topical HDL Therapy Corrects Delayed Wound Healing in Apolipoprotein E Deficient Mice. Pharmaceuticals 2014, 7, 419-432.

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