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Loss of Cyclin B1 followed by downregulation of Cyclin A/Cdk2, apoptosis and antiproliferation in Hela cell line

Other Titles
 Loss of Cyclin B1 followed by downregulation of Cyclin A/Cdk2, apoptosis and antiproliferation in Hela cell line 
Authors
 Xian He Xie  ;  Hee Jung An  ;  Suki Kang  ;  Sunghui Hong  ;  Yoon Pyo Choi  ;  Young Tae Kim  ;  Young Deuk Choi  ;  Nam Hoon Cho 
Citation
 International Journal of Cancer, Vol.116(4) : 520-525, 2005 
Journal Title
 International Journal of Cancer 
ISSN
 0020-7136 
Issue Date
2005
Abstract
Recent studies have shown that Cyclin B1 is overexpressed in various tumor types but present at low levels in normal tissues. To explore the possibility of employing Cyclin B1 as an anticancer target, we knocked down Cyclin B1 in an HeLa cell line using RNA interference (RNAi). Subsequently, we monitored cell cycle-related molecules by Western blot together with immunofluorescence and determined cell cycle distribution by flow cytometry. XTT and soft agar colony growth experiments were performed to detect cell viability and proliferation. Furthermore, we analyzed cell apoptosis by measuring Bcl-2 and Bax protein level and DNA-ladder assay. After performing Cyclin B1 RNAi, Cyclin B1, Cyclin A and Cdk2 protein levels were found to be markedly downregulated, whereas Cdc2 was almost unaffected; S-phase fraction increased significantly; HeLa cell viability and cell colony forming ability were markedly diminished after the RNAi; Bcl-2 was noticeably attenuated but Bax was hardly changed; and HeLa cells displayed typical DNA ladder. The loss of Cyclin B1 resulted in the downregulation of Cyclin A and Cdk2, S-phase delay and eventually led to cell apoptosis and the decrease of cell viability and proliferation. Our studies suggest that Cyclin B1 may be a promising anticancer target.
Full Text
http://onlinelibrary.wiley.com/doi/10.1002/ijc.21056/abstract
DOI
10.1002/ijc.21056
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Obstetrics and Gynecology (산부인과학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Pathology (병리학교실) > 1. Journal Papers
1. College of Medicine (의과대학) > Dept. of Urology (비뇨의학교실) > 1. Journal Papers
Yonsei Authors
강숙희(Kang, Suki) ORCID logo https://orcid.org/0000-0002-9957-3479
김영태(Kim, Young Tae) ORCID logo https://orcid.org/0000-0002-7347-1052
조남훈(Cho, Nam Hoon) ORCID logo https://orcid.org/0000-0002-0045-6441
최영득(Choi, Young Deuk) ORCID logo https://orcid.org/0000-0002-8545-5797
최윤표(Choi, Yoon Pyo)
홍성희(Hong, Sung Hui)
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URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/147526
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