二甲基亚砜诱导人食管癌细胞分化的实验研究

维甲酸诱导分化治疗白血病取得巨大成功,为治疗肿瘤开辟了新思路,但诱导分化治疗实体瘤目前尚无突破性进展。二甲基亚砜有多种生物学作用如诱导白血病细胞分化,对实体瘤细胞的作用研究却不多。本文将二甲基亚砜试用于体外培养的人食管癌细胞株,同时设维甲酸作参照,从形态和细胞周期改变、角蛋白表达及成瘤性等多方面证实二甲基亚砜和维甲酸一样可诱导食管癌细胞分化,并且发现二甲基亚砜的作用优于维甲酸,强烈提示二甲基亚砜对实体瘤治疗的可能应用前景。

EXPERIMENTAL STUDY ON THE INDUCED-DIFFERENTIATION OF HUMAN ESOPHAGEAL CANCER CELLS TREATED WITH DIMETHYLSULFOXIDE

The fact that treatment of leukemia (Acute Promyelocytic Leukemia ) with ATRA ( All-Trans Retinoic Acid) was so succeeded that it was considered as a good example for tumor therapy. In the treatment of solid tumors by means of induced differentiation, however, has not been yet so broken-through. DMSO ( Dimethyl-sulfoxide ) was a common and simple organic compound, which comprised a varity of biological activities. For example, DMSO induced differentiation of leukemia in many reports. However, the effect of DMSO on solid tumors was to be explored further. In the present study, DMSO wasused to human esophageal cancer cell lines in vitro in comparision with the classical inducer A-TRA. From the view of morphology, cell cycle, growth inhibition, cytokeratin 4 expression, dye transfer and tumorigenecity, the results demonstrated that DMSO as well as ATRA could induce differentiation of human esophageal cancer cells. Interestingly, DMSO was comfirmed to be more effective in inducing differentiation of esophageal cancer cells than ATRA. It suggests that DMSO showed some good prospects for the treatment of solid tumors.