Premium
Aberrant expression of Cks1 and Cks2 contributes to prostate tumorigenesis by promoting proliferation and inhibiting programmed cell death
Author(s) -
Lan Yongsheng,
Zhang Yongyou,
Wang Jianghua,
Lin Chunhong,
Ittmann Michael M.,
Wang Fen
Publication year - 2008
Publication title -
international journal of cancer
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.475
H-Index - 234
eISSN - 1097-0215
pISSN - 0020-7136
DOI - 10.1002/ijc.23548
Subject(s) - biology , gene knockdown , cancer research , cell growth , prostate cancer , carcinogenesis , programmed cell death , apoptosis , cell cycle , cancer , cell , microbiology and biotechnology , genetics
The mammalian Cks family consists of 2 well‐conserved small proteins, Cks1 and Cks2. Cks1 has been shown to promote cell‐cycle progression by triggering degradation of p27 kip1 . The function of Cks2 in somatic mammalian cells is not well understood although it is required for the first metaphase/anaphase transition during the meiosis. Emerging evidence shows that elevated expression of Cks1 and Cks2 is often found in a variety of tumors, and is correlated with poor survival rate of the patients. Here we demonstrated that expression of Cks1 and Cks2 were elevated in prostate tumors of human and animal models, as well as prostatic cancer cell lines. Forced expression of Cks1 and Cks2 in benign prostate tumor epithelial cells promoted cell population growth. Knockdown of Cks1 expression in malignant prostate tumor cells inhibited proliferation, anchorage‐independent growth, and migration activities, whereas knockdown of Cks2 expression induced programmed cell death and inhibited the tumorigenicity. Collectively, the data suggest that elevated expression of Cks1 contributes to the tumorigenicity of prostate tumor cells by promoting cell growth and elevated expression of Cks2 protects the cells from apoptosis. Thus, the finding suggests a novel therapeutic strategy for prostatic cancer based on inhibiting Cks1 and Cks2 activity. © 2008 Wiley‐Liss, Inc.