CD24 promotes the proliferation and inhibits the apoptosis of cervical cancer cells in vitro

Pei,Zhen; Zhu,Guangchao; Huo,Xiaolei; Gao,Lu; Liao,Shan; He,Junyu; Long,Yuehua; Yi,Hong; Xiao,Songshu; Yi,Wei; Chen,Pan; Li,Xiaoling; Li,Guiyuan; Zhou,Yanhong

doi:10.3892/or.2015.4521

CD24 promotes the proliferation and inhibits the apoptosis of cervical cancer cells in vitro

Authors:
- Zhen Pei
- Guangchao Zhu
- Xiaolei Huo
- Lu Gao
- Shan Liao
- Junyu He
- Yuehua Long
- Hong Yi
- Songshu Xiao
- Wei Yi
- Pan Chen
- Xiaoling Li
- Guiyuan Li
- Yanhong Zhou
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Affiliations: Hunan Provincial Tumor Hospital and The Affiliated Tumor Hospital of Xiangya School of Medicine, Central South University, Changsha, Hunan 410006, P.R. China, Cancer Research Institute, Central South University, Changsha, Hunan 410078, P.R. China, Department of Histology and Embryology, Changzhi Medical College, Changzhi, Shanxi 046000, P.R. China, Research Center of Carcinogenesis and Targeted Therapy, Xiangya Hospital, Central South University, Changsha, Hunan 410008, P.R. China, Department of Gynecology and Obstetrics, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, P.R. China
Published online on: December 24, 2015 https://doi.org/10.3892/or.2015.4521
Pages: 1593-1601

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Abstract

The protein CD24 is a cell surface protein that appears to function as an adhesion molecule; its expression has been shown to correlate with prognosis in a variety of tumors. Herein, we investigated the possible role and mechanism of CD24 in cervical cancer. Our results showed that CD24 was overexpressed in cervical cancer tissues compared with that in the adjacent non‑cancerous tissues by qPCR, immunohistochemistry and western blotting technologies. To explore the possible mechanism of CD24 in cervical cancer, we elucidated the effect of CD24 on the proliferation and apoptosis of cervical cancer HeLa cells and found that a considerable increase in cell proliferation was observed in the HeLa cells with CD24 overexpession. The rate of cell apoptosis was decreased in the HeLa/CD24 cells compared with the HeLa or HeLa/vector cells. Cell apoptosis is closely related with a reduction in mitochondrial membrane potential (ΔΨm) and an increase in intracellular reactive oxygen species (ROS) and calcium ion (Ca2+) concentrations. Our results showed that overexpression of CD24 in the cervical cancer HeLa cells, led to an increase in ΔΨm and a decrease in intracellular ROS and Ca2+ concentrations. Furthermore, we found that CD24 was correlated with dysregulation of the MAPK signaling pathway in cervical cancer tissues in vitro. At the same time, we found that CD24 overexpression affected the expression of p38, JNK2 and c-Jun in vitro. In summary, our results suggest that CD24 is upregulated in cervical cancer tissues and plays its functions by affecting the MAPK signaling pathway in cervical cancer.

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