癌变·畸变·突变

• 论著 • 上一篇    下一篇

欧前胡素对体外培养的人表皮黑素细胞Rab27a和酪氨酸酶的作用

谢佳均1,林  玲2,#,刘少刚2,#,吴晓佳1,阮海东1,郭佩湘1,童鹏飞1,方  斌2,陈玮莹2,*,佘绍逸3,*   

  1. 汕头大学医学院2009级7年制临床医学专业,广东  汕头  515041
  • 收稿日期:2014-02-18 修回日期:2014-04-03 出版日期:2014-07-30 发布日期:2014-07-30
  • 通讯作者: 陈玮莹,E-mail:wychen@stu.edu.cn;佘绍逸,E-mail: ssylt@163.com
  • 作者简介:谢佳均(1990- ),男,广东省阳江市人,硕士研究生,研究方向:临床医学。#该作者对本文的贡献与第一作者等同。
  • 基金资助:

    广东省自然科学基金项目(9151806001000009),广东省中医药局课题(2010185),2012年广东省大学生创新实验项目(1056010101)

Effects of imperatorin on Rab27a and tyrosinase in cultured human epidermal melanocytes

XIE Jia-jun1,LIN Ling2,#,LIU Shao-gang2,#,WU Xiao-jia1,RUAN Hai-dong1,GUO Pei-xiang1,TONG Peng-fei1,FANG Bin2,CHEN Wei-ying2,*,SHE Shao-yi3,*   

  1. 2009 Student of 7-year Clinical Medicine Program, Shantou University Medical College, Shantou 515041
  • Received:2014-02-18 Revised:2014-04-03 Online:2014-07-30 Published:2014-07-30

摘要:

目的: 观察欧前胡素对体外培养的人表皮黑素细胞转运相关蛋白Rab27a和酪氨酸酶的作用。方法:体外分离、纯化培养人表皮黑素细胞。随机分为空白对照组和欧前胡素处理组,以50或25 μmol/L欧前胡素作用48 h后观察黑素细胞形态,免疫荧光法检测Rab27a 和酪氨酸酶在黑素细胞中的定位及变化,应用透射电镜观察黑素细胞黑素小体的超微结构。结果:欧前胡素作用48 h后,黑素细胞的树状突起缩短,免疫荧光检测显示,黑素细胞Rab27a和酪氨酸酶蛋白在细胞内定位未见明显变化,但欧前胡素作用后Rab27a蛋白的荧光强度轻度增强(P<0.05),而酪氨酸酶荧光强度降低(P<0.05)。透射电镜结果可见黑素细胞中的黑素小体数量减少。结论:欧前胡素对体外培养的人表皮黑素细胞Rab27a表达呈促进作用,对酪氨酸酶活性及黑素合成呈抑制作用。

关键词: 黑素细胞, 欧前胡素, 酪氨酸酶, Rab27a, 黑素小体, 转移

Abstract:

OBJECTIVE: To investigate the effects of imperatorin on Rab27a and tyrosinase in cultured human epidermal melanocytes. METHODS:Human epidermal melanocytes were separated,purified and cultured in vitro. Melanocytes were randomly divided into control group and imperatorin group. After 48 h incubation with culture medium M254 or imperatorin(50 or 25 μmol/L),the morphology of melanocytes was examined by inverted phase contrast microscopy. The effects of imperatorin on Rab27a and tyrosinase in melanocytes were investigated by immunofluoresent assay. The ultrastructures of melanocytes and melanosomes were studied by transmission electron microscopy. RESULTS:The melanocytes cultured with imperatorin for 48 h had shorter dendrites. Immunofluorescence microscopy showed that the location of Rab27a and tyrosinase in melanocytes were not obviously changed,but the fluorescence intensity of Rab27a was enhanced (P<0.05) and tyrosinase attenuated (P<0.05). Fewer melanosomes found in the cultured human epidermal melanocytes by transmission electron microscopy. CONCLUSION:Imperatorin promoted the expression of Rab27a and inhibited tyrosinase activity.

Key words: melanocyte, imperatorin, tyrosinase, Rab27a, melanosome, transfer