CIZ1 regulates the proliferation, cycle distribution and colony formation of RKO human colorectal cancer cells

Yin,Jing; Wang,Changliang; Tang,Xiaoyong; Sun,Huaibin; Shao,Qianqian; Yang,Xigui; Qu,Xun

doi:10.3892/mmr.2013.1716

CIZ1 regulates the proliferation, cycle distribution and colony formation of RKO human colorectal cancer cells

Authors:
- Jing Yin
- Changliang Wang
- Xiaoyong Tang
- Huaibin Sun
- Qianqian Shao
- Xigui Yang
- Xun Qu
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Affiliations: Institute of Basic Medical Sciences, Qilu Hospital, Shandong University, Jinan, Shandong 250012, P.R. China, Department of Dermatology, Shandong Provincial Institute of Dermatology and Venereology, Shandong Academy of Medical Sciences, Jinan, Shandong 250022, P.R. China, Department of Internal Medicine Oncology, Shandong Cancer Hospital, Shandong Academy of Medical Sciences, Jinan, Shandong 250117, P.R. China
Published online on: October 8, 2013 https://doi.org/10.3892/mmr.2013.1716
Pages: 1630-1634

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Abstract

Cip1‑interacting zinc finger protein 1 (CIZ1) is a nuclear protein that was observed to bind to p21Cip1/Waf1. p21Cip1/Waf1 regulates the cell cycle and is associated with colorectal cancer (CRC) progression. However, the effect of CIZ1 on CRC cells remains unclear. In the present study, CIZ1 was observed to be highly expressed in RKO human CRC cells. Silencing of CIZ1 using small interfering RNA (siRNA) suppressed RKO cell proliferation. Flow cytometric analysis demonstrated that knockdown of CIZ1 decreased the percentage of cells in the S phase and increased the ratio of cells in the G0/G1 phase in parallel with upregulated cell apoptosis. Moreover, the number and size of RKO cell colonies was repressed by knockdown of the CIZ1 gene. These results suggested that CIZ1 may be involved in colon cancer progression by regulating cell proliferation, cell cycle, apoptosis and colony formation. Furthermore, CIZ1‑siRNA may provide a novel tool for CRC investigation and therapy.

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