Abstract: Objective To explore the role of zinc finger protein (ZNF)185 in the proliferation of human glioma cells. Methods Human glioma tissues and tumor adjacent tissues were obtained from glioma patients diagnosed pathologically in Tangshan Gongren Hospital from January 2011 to December 2013. Total protein was extracted from different tissues. The ZNF185 expression was detected by Western-blot assay. Total RNA was extracted from tumor adjacent tissues. ZNF185 coding sequence was obtained by RT-PCR and inserted into pEGFPC2 plasmid to construct the ZNF185 expression vector. Lipofactamine2000 was used to transfect the ZNF185 expression vector to human glioma cell SF767. pEGFPC2 blank vector transfected SF767 cells were used as control. Changes of cell cycle were analyzed by flow cytometry, and cell proliferation was analyzed by MTT assay. Results The expression of ZNF185 decreased significantly in human glioma tissues compared
to that of tumor adjacent tissues（P < 0.01). The over expression of ZNF185 in SF767 resulted in the increased proportion of cell cycle G0-G1phase, but decreased proportion of S phase（P < 0.05). Furthermore, the cell proliferation was significantly inhibited in the ZNF185 over-expressed SF767 cells compared with that of blank vector transfected cells（P < 0.05). Conclusion ZNF185 plays an inhibitory role in cell proliferation of human brain glioma cells.

Key words: glioma, cell cycle, cell proliferation, zinc fingers, transfection, ZNF185