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Study Reveals Reason Behind Men's Susceptibility to Skin Cancer

by VR Sreeraman on December 3, 2011 at 2:42 PM
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 Study Reveals Reason Behind Men's Susceptibility to Skin Cancer

A new study has found that lower levels of an important skin antioxidant makes men more vulnerable to skin cancer than women.

Researchers at The Ohio State University Comprehensive Cancer Center have found that male mice had lower levels of an important skin antioxidant than female mice and higher levels of certain cancer-linked inflammatory cells.

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The antioxidant, a protein called catalase, inhibits skin cancer by mopping up hydrogen peroxide and other DNA-damaging reactive-oxygen compounds that form during exposure to ultraviolet B light (UVB), a common source of sunburn and cancer-causing skin damage.

"The findings suggest that women may have more natural antioxidant protection in the skin than men," said study co-leaders Gregory Lesinski and Tatiana Oberyszyn.
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"As a result, men may be more susceptible to oxidative stress in the skin, which may raise the risk of skin cancer in men compared to women," said Lesinski.

Lesinski, Oberyszyn, Sullivan and their colleagues conducted the study using a strain of hairless mice that develops squamous cell carcinoma of the skin - the second most common skin cancer in humans - when exposed to UVB.

The investigators also found that treating mice with topical catalase inhibited the migration of the suppressor cells into UVB-exposed skin, suggesting that the influx of these cells in males might be due to the relatively lower skin-catalase activity.

In fact, male mice with UVB-induced skin tumors had 55 percent more of the suppressor cells in the skin than did their female counterparts.

"This is the first report to our knowledge of a sex discrepancy in this group of inflammatory cells in tumor-bearing mice, and it suggests that our findings might translate to other types of cancer," said Oberyszyn, associate professor of pathology.

"Men face a higher risk of numerous types of cancers, and relatively higher levels of inflammatory myeloid cells might contribute to this susceptibility," Oberyszyn added.

The research has been published online in the Journal of Investigative Dermatology.

Source: ANI
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