UC given $1 million to develop skin cancer prevention treatment

A research team led by University of Cincinnati (UC) scientists has received $1 million from the National Cancer Institute to develop a new topical treatment that would not only increase skin pigmentation to block harmful ultraviolet (UV) rays, but also repair damage that can lead to skin cancer.

The researchers will work with a chemically modified hormone called alpha-melanocyte stimulating hormone (alpha-MSH). Known to increase skin pigmentation--the "tan" that reduces dangerous UV ray penetration--alpha-MSH has also been found to repair precancerous damage that UV rays do to skin cell DNA, the genetic material within cells.

"We hope to develop a new topical cream that will prevent skin cancer by both increasing skin pigmentation and at the same time repairing DNA damage caused by UV radiation," says study leader Zalfa Abdel-Malek, PhD, of UC's dermatology department.

"We have already shown that alpha-MSH repairs DNA damage caused by excessive sun exposure, thus reversing the cancer-causing effects of UV radiation," says Abdel-Malek, who has studied this phenomenon in isolated human melanocytes, the cells that produce the tanning pigment melanin.

Abdel-Malek will work with Ana Luisa Kadekaro, PhD, a UC dermatology instructor, to determine the ability of alpha-MSH, and synthesized versions of it, to reduce DNA damage in melanocytes that have been exposed to UV radiation in the lab.

To make it easier for the hormone to penetrate the fatty lipid layer of the skin, team members James Knittel, PhD, of UC's College of Pharmacy, and Carrie Haskell-Luevano, PhD, of the University of Florida, have already reduced alpha-MSH from its original peptide chain of 13 amino acids to a chain of only four amino acids. They hope to make the chain even smaller, and consequently more effective at penetrating the skin to target the melanocytes.

Dorothy Supp, PhD, of UC's department of surgery, will study the synthesized pe

Contact: Sheryl Hilton
University of Cincinnati

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