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Immunohistochemical Study of O-GlcNAcylation in Human Skin Tumors

Young Lee ORD ID 1,  홍동균 1,  최대경 1,  임슬기 1,  손경철 1,  Im Myung 2,  Seo Young Joon ORD ID 1,  Lee, Young Ho 1,  이중훈 1,  Kim Chang Deok ORD ID 1

1충남대학교
2충남대학교병원

Accredited

ABSTRACT

O-linked β-N-acetylglucosamine modification is an important post-translational modification,emerging as a novel regulatory mechanism in various cellular events. Recently, several studies have shown thatO-GlcNAcylation plays an essential role in human breast, lung, and colon cancers. With regard to skin cancers,the role of O-GlcNAcylation has yet to be elucidated. To investigate whether O-GlcNAcylation is linked tohuman skin tumor development, immunohistochemical analysis was performed to investigate the presence of OGlcNAcylationin various skin tumors. We evaluated the levels of O-GlcNAcylation, O-GlcNAc transferase, andO-GlcNAcase in 29 benign tumors, 12 premalignant tumors, and 26 malignant tumors in skin. Compared to thebenign tumors, premalignant and malignant tumors had increased patterns of O-GlcNAcylation. In addition, theO-GlcNAc transferase and O-GlcNAcase levels were higher in premalignant and malignant tumors than in benigntumors. Interestingly, O-GlcNAcase levels were significantly increased in premalignant tumors compared tobenign and malignant tumors. These results suggest that O-GlcNAcylation of proteins may play an important rolein the development of human skin tumors.

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