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Effects of rotating clinostat simulated weightlessness on cell proliferation and cell cycle of human gastric carcinoma cell line SGC-7901
Ming Zhu, Ben-Yan Wu, Jie-Lin Nie, Ying-Hui Li
Ming Zhu, Ben-Yan Wu, Department of Gastroenterology, South Building, the General Hospital of Chinese PLA, Beijing 100853, China
Jie-Lin Nie, Ying-Hui Li, the 13th laboratory of Institute of Space Medico-Engineering, Beijing 100094, China
Supported by the Preparative Research Foundation of the Main Equipment Department, No. 51400020204JB1002.
Correspondence to: Ben-Yan Wu, Department of Gastroenterology, South Building, the General Hospital of Chinese PLA, Beijing 100853, China. zm6924@vip.sina.com
Received: January 31, 2005 Revised: February 11, 2005 Accepted: February 26, 2005 Published online: April 1, 2005
AIM: To investigate the effect of simulated weightlessness on cell cycle and proliferation of human gastric carcinoma cell line SGC-7901.
METHODS: A rotating clinostat was used to simulate weightlessness. The expression of PCNA was examined by immunohistochemical staining. The changes of cell cycle were examined by flow cytometry.
RESULTS: The expression of PCNA did not change significantly after 12 h, 24 h, and 36 h of simulated weightlessness, but decreased significantly after 48 h and 72 h (P<0.05 and P<0.01, respectively). The cell cycle of 12 h, 24 h, and 36 h groups did not change significantly. However, the cells in G0+G1 phase in 48 h and 72 h groups were increased significantly (P<0.01 and P<0.05, respectively), while the cells in S+G2+M phase were decreased significantly (P<0.01 and P<0.05).
CONCLUSION: Simulated weightlessness by a clinostat can prevent the transition of cells from G1 phase to S phase, and thus the proliferation of SGC-7901 cells was inhibited.
Citation: Zhu M, Wu BY, Nie JL, Li YH. Effects of rotating clinostat simulated weightlessness on cell proliferation and cell cycle of human gastric carcinoma cell line SGC-7901. Shijie Huaren Xiaohua Zazhi 2005; 13(7): 856-859
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