3933
Thus , UV - induced Erbb2 activation increases skin tumorigenesis through inhibitory phosphorylation of Chk1 , Cdc25a maintenance , and suppression of S - phase arrest via a PI3K / Akt - dependent mechanism .
 skin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 skin