Abstract:Objective To investigate the effect of proliferation and invasion on hyperthermia combinated with cisplatin in human laryngeal carcinoma Hep-2 cells and whether the two treatments have an interaction. Methods The Hep-2 cells were randomly divided into 4 groups: control group (37℃), hyperthermia group (43℃), cisplatin group and hyperthermia combined with cisplatin group. The effects of hyperthermia combined with cisplatin on proliferation, migration and invasion of Hep-2 cells were determined by MTT assay, Wound-healing assay and transwell invasion assay. Results Four groups of cells were administrated with MTT. The OD value at 490 nm were (1.24?±?0.13), (0.99?±?0.11), (0.75?±?0.07) and (0.31?±?0.07) respectively. Factorial analysis showed that OD values at different temperatures were statistically significant (P?0.05). OD values at different concentrations of cisplatin were statistically significant (P?0.05). There was an interaction between hyperthermia and cisplatin on OD value at 490?nm (P?0.05). The percentage of 'unhealed area' in the four groups were (31.83?±?1.62) %, (40.47?±?1.52) %, (53.13?±? 2.61) % and (79.83?±?0.95) % respectively. Factorial analysis showed that the difference of the influence of different temperature of hyperthermia on the percentage of 'unhealed area' was statistically significant (P?0.05). The influence of different concentrations of cisplatin on the percentage of 'unhealed area' was statistically significant (P?0.05). There was an interaction between the influence of hyperthermia and cisplatin on the percentage of 'unhealed area' (P?0.05). The number of invasion cells in the four groups were (27.80?±?1.64), (21.80?±?1.48), (11.20?±?1.48) and (1.80?±?0.84) respectively. Factorial analysis showed that the influence of different temperature of hyperthermia on the number of invasion cells was statistically significant (P?0.05). The influence of different concentrations of cisplatin on the number of invasion cells was statistically significant (P?0.05). There was an interaction between the effects of hyperthermia and cisplatin on the number of invasion cells (P?0.05). Conclusion Hyperthermia can enhance the sensitivity of Hep-2 cells to cisplatin. Hyperthermia combined with cisplatin has synergistic anti-tumor effects.