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Penn Dental Medicine team identifies molecule critical to healing wounds
Date:11/15/2013

Skin provides a first line of defense against viruses, bacteria and parasites that might otherwise make people ill. When an injury breaks that barrier, a systematic chain of molecular signaling launches to close the wound and re-establish the skin's layer of protection.

A study led by researchers from the University of Pennsylvania's School of Dental Medicine now offers a clearer explanation of the role of one of the players in the wound-healing process, a molecule called FOX01. Contrary to what had been expected, FOX01 is critical to wound healing, providing researchers with a possible new target for drugs that could help speed that process for people with impaired wound healing.

Senior author Dana Graves is a professor in Penn Dental Medicine's Department of Periodontics and is vice dean for scholarship and research. He collaborated on the study with Penn's Bhaskar Ponugoti, Fanxing Xu, Chenying Zhang, Chen Tian and Sandra Pacio.

A critical element of wound healing involves the movement of keratinocytes, the primary cells comprising the epidermis, or the outer layer of skin. Previous research had found that FOX01 was expressed at higher levels in wounds, but scientists did not understand what role the molecule was playing. In other scenarios, such as in cancer cells, FOX01 promotes cell death and interferes with the cell reproduction, two actions that would seem to be detrimental to healing,

To investigate the role of FOX01 in wound healing, Graves and colleagues bred mice that lacked the protein in their keratinocytes and then observed the wound healing process in these mice compared to mice with normal FOX01.

"We thought that deleting FOX01 would speed up the wound-healing process," Graves said, "but in fact it had the opposite effect."

The mice that lacked FOX01 showed significant delays in healing. Whereas all wounds on control mice were healed after one week, all of the experimental mice still had o
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Contact: Katherine Unger Baillie
kbaillie@upenn.edu
215-898-9194
University of Pennsylvania
Source:Eurekalert  

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