Abstract: Objective  To investigate the effects of lobaplatin on proliferation and invasion of cervical cancer CaSki cells. Methods  Human cervical cancer CaSki cells were randomly divided into blank control group, 2, 6 and 12 μg/ml lobaplatin groups by random number table method. The proliferations of the cells were detected by methyl thiazolyl tetrazolium (MTT). The morphological changes of the cells were observed by inverted microscope. The invasive abilities of the cells were detected by Transwell invasion test. The protein expressions of extracellular signalregulated kinase (ERK) and phosphoextracellular signalregulated kinase (p-ERK) were detected by Western blotting. ResultsThe absorbance (A) values of blank group, 2, 6, 12 μg/ml lobaplatin groups cultured for 24 h were 0.513±0.023, 0.428±0.014, 0.380±0.012 and 0.300±0.013 respectively, those of the cells cultured for 48 h were 0.831±0.024, 0.558±0.019, 0.415±0.015 and 0.088±0.009 respectively, and those of the cells cultured for 72 h were 1.153±0.022, 0.572±0.023, 0.201±0.017 and 0.052±0.014 respectively. The differences were statistically significant (F=12.922, P＜0.001; F=10.192, P＜0.001; F=11.192, P＜0.001), and the differences between each two groups were statistically significant (all P<0.05). Under inverted microscope, the cells of the platinum groups were shrunken and round, the volume and quantity were reduced, the morphology was irregular, the gap was increased, and the changes were more obvious with the increase of the concentration and the culture time. The numbers of penetrating cells of the blank group, 2, 6, 12 μg/ml lobaplatin groups were 87.27±9.38, 71.02±8.92, 53.20±10.02 and 21.02±7.37 respectively. The difference was statistically significant (F=87.291, P＜0.001), and the differences between each two groups were statistically significant (all P<0.05). The A values of ERK protein in the blank group, 2, 6, 12 μg/ml lobaplatin groups （0.955±0.021、0.953±0.023、0.950±0.020、0.951±0.022） showed no significant difference (F=2.033, P=0.783), but the A values of p-ERK protein in the four groups were 0.941±0.015, 0.831±0.020, 0.620±0.019 and 0.493±0.017 respectively, which showed significant difference (F=11.921, P＜0.001), and the differences between each two groups were statistically significant (all P<0.05). Conclusion Lobaplatin can inhibit the proliferation and invasion of cervical cancer CaSki cells, which may be related to the inhibition of the expression of p-ERK protein.

Key words: Uterine cervical neoplasms, Cell proliferation, Neoplasm invasiveness, Lobaplatin, CaSki cells