去甲斑蝥素抑制黑色素瘤M14细胞增殖和诱导细胞凋亡的研究

Objective To investigate the effects of norcantharidin on the proliferation and apoptosis related proteins Bax and Bcl-2 of human melanoma M14 cells. Methods Melanoma M14 cell line cultured in vitro was treated with concentrations of 50, 100 and 500 μg / L norcantharidin respectively, and untreated cells were used as control. Cell proliferation was detected by CCK-8 method after treatment for 24 h and 48 h. Morphology of cells was observed under inverted microscope. DAPI nuclear staining was used to observe the morphological changes of apoptosis under fluorescence microscope. The expressions of Bax and Bcl-2 were detected by Western blot assay. Results CCK-8 results showed that concentrations of 100 and 500 μg/L norcantharidin inhibited the proliferation of melanoma M14 cells after treatment for 24 h and 48 h (P＜0.05), and the higher the concentration, the more significant the inhibitory effect. The cells showed irregular contours, nucleus shrinkage, small volume, and poor cell adhesion of apoptosis changes under inverted microscope and fluorescence microscope. Western blot analysis showed that the relative expression of Bcl-2 decreased gradually with the increased concentration of norcantharidin (P＜0.05), and the relative expression of Bax increased gradually (P＜0.05).Conclusion Norcantharidin can inhibit the proliferation of melanoma M14 cells, and its mechanism may be related to the promotion of apoptosis.     

特发性皮肤钙沉着症一例

正临床资料患者,男,15岁。主因左臀部肿物2年,于2015年9月1日就诊。2年前,无明显诱因患者左臀部出现一绿豆大小皮下肿物,无自觉症状,近半年来肿物逐渐增大。既往体健,发病前无局部注射史及外伤感染史,未接受钙剂治疗,家族中无类似疾病患者。体格检查:发育正常,营养中等,无突眼及甲状腺肿大,全身浅表淋巴结未触及增大。心、肺、腹查体均未见明显异常,四肢关节无畸形,肢端无硬化。