p53 interferes with microtubule-stabilizing agent-induced apoptosis in prostate and colorectal cancer cells

Kim,Ji  Young; Chung,Jin-Yong; Lee,Seung  Gee; Kim,Yoon-Jae; Park,Ji-Eun; Yun,Jeanho; Park,Young  Chul; Kim,Byeong  Gee; Yoo,Young  Hyun; Kim,Jong-Min

doi:10.3892/ijmm.2013.1333

p53 interferes with microtubule-stabilizing agent-induced apoptosis in prostate and colorectal cancer cells

Authors:
- Ji Young Kim
- Jin-Yong Chung
- Seung Gee Lee
- Yoon-Jae Kim
- Ji-Eun Park
- Jeanho Yun
- Young Chul Park
- Byeong Gee Kim
- Young Hyun Yoo
- Jong-Min Kim
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Affiliations: Department of Anatomy and Cell Biology, Dong-A University, Busan 602-714, Republic of Korea, Mitochondria Hub Regulation Center, Dong-A University, Busan 602-714, Republic of Korea, Department of Biochemistry, Dong-A University, Busan 602-714, Republic of Korea, Department of Microbiology and Immunology, Pusan National University School of Medicine, Yangsan, Gyeongnam 626-870, Republic of Korea, Department of Biology, College of Natural Sciences, Pusan National University, Busan 609-735, Republic of Korea, Medical Research Science Center, Dong-A University, Busan 602-714, Republic of Korea
Published online on: April 5, 2013 https://doi.org/10.3892/ijmm.2013.1333
Pages: 1388-1394

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Abstract

Taxanes are microtubule-stabilizing agents that have anticancer activity against several types of human solid tumors. Although the primary mechanism of action of these drugs is well understood, the signaling pathways that confer resistance to these agents in certain types of cancer remain poorly understood. In particular, the association of p53 with the mechanism(s) of taxane-mediated cell death is still controversial. In this study, we showed that p53 has a profound inhibitory effect on docetaxel (Doc)-induced apoptosis in prostate and colorectal cancer cells and that caspases play a critical role in this process. Doc induced prostate cancer cell apoptosis at high levels in p53-null PC3 cells, at intermediate levels in p53-mutant DU145 cells and at low levels in p53 wild-type LNCaP cells. While transient overexpression of p53 in PC3 cells suppressed Doc-induced apoptosis, knockdown of p53 in LNCaP cells increased apoptosis. This finding was further confirmed using an isogenic pair of colorectal cancer cell lines, HCT-116 p53-/- and p53+/+, indicating that p53 inhibits induction of apoptosis by Doc. To our knowledge, this is the first report describing that chemical or genetic knockout of p53 enhances the susceptibility of both prostate and colorectal cancer cells to Doc-induced apoptosis. These results may suggest an approach to stratify patients for regimens involving Doc.

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