New Study Offers Info on Skin Wound Healing

A recent Japanese study has shown how an essential part of wound healing works in the skin, leading to potential treatment options.

A group led by Dr. Yasunori Okada at Keio University in Tokyo, Japan has demonstrated that matrix metalloproteinases (MMPs) are instrumental in wound healing.

Wound healing is the complex process of regenerating dermal and epidermal tissue after skin injury. MMPs, which can degrade proteins, are essential in breaking down wounded tissues to allow for wound healing; however, the specific function of individual MMPs in wounded tissues requires further study.

Using mouse models that lacked individual MMPs, Hattori and the researchers noted that wound closure in MMP-deficient mice was significantly delayed compared with normal mice. Both MMPs examined played key roles in movement of skin cells, and one contributed to new blood vessel growth, as well. Topical treatment with MMPs increased the rate of wound healing in these mice, providing a possible therapeutic strategy for treating delayed wound healing.

Dr. Okada and colleagues "have provided the first evidence of the importance of MMP-9 and MMP-13 on cutaneous wound healing by demonstrating that [mice that lack either] MMP-9, MMP-13, or both MMP-9/13 exhibit a significant delay in macroscopic wound closure and histological re-epithelialization. … [Their data] suggest the possible treatment of delayed wound healing by the application of the MMPs or inducers of the MMPs."

Journal reference: Hattori et al. MMP-13 Plays a Role in Keratinocyte Migration, Angiogenesis, and Contraction in Mouse Skin Wound Healing. American Journal Of Pathology, 2009; DOI: 10.2353/ajpath.2009.081080

Adapted from materials provided by American Journal of Pathology, via EurekAlert!, a service of AAAS.

ScienceDaily, July 23, 2009

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