Abstract
Phosphatase and tensin homologue deleted on chromosome 10 (PTEN) was identified in 1997 as a tumor suppressor gene through mapping of homozygous mutations occurring in multiple sporadic tumor types and in patients with cancer predisposition syndromes including Cowden disease (Song et al., 2012). Since that time, PTEN has emerged as one of the most frequently mutated or deleted genes in human cancers, including human skin cancers. In particular, loss of PTEN function through mutation or deletion has been observed in up to 70% of melanoma cell lines, and epigenetic silencing of PTEN has been observed in 30-40% of malignant melanomas (Mehnert and Kluger, 2012).
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