上海交通大学学报（医学版）

上海交通大学学报（医学版）

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褐藻糖胶对U266细胞自噬、迁移及侵袭的影响

罗国平 1，刘芬 1，谷文 2，陈力学 3，吕敬龙 4，肖青 1   

  1. 重庆医科大学附属第一医院1. 血液科，2. 泌尿外科，3. 实验研究中心，重庆 400016；4. 重庆三峡中心医院血液科，重庆 404000
  • 出版日期:2017-03-28 发布日期:2017-03-30
  • 作者简介:罗国平（1990—），男，硕士生；电子信箱：948410518@qq.com。
  • 基金资助:

    重庆市卫生局重点项目(2013-1-013)

Effect of fucoidan on autophagy, migration and invasion of U266 cells

LUO Guo-ping1, LIU Fen1, GU Wen2, CHEN Li-xue3, Lü Jing-long4, XIAO Qing1   

  1. 1. Department of Hematology, 2. Department of Urinary Surgery, 3. Central Laboratory, The First Affiliated Hospital of Chongqing University of Medical Sciences, Chongqing 400016, China; 4. Department of Hematology, Chongqing Three Gorges Central Hospital, Chongqing 404000, China
  • Online:2017-03-28 Published:2017-03-30
  • Supported by:

    Key Project of Chongqing Municipal Health Bureau, 2013-1-013

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摘要：

目的 ·探讨褐藻糖胶对多发性骨髓瘤U266细胞自噬、迁移及侵袭的影响。方法 ·褐藻糖胶处理细胞后，透射电子显微镜（TEM）观察细胞自噬小体，Transwell小室观察细胞迁移及侵袭能力，Western blotting测定LC3-Ⅱ/LC3-Ⅰ、Beclin-1、P62、MMP9、CXCR4、p-AKT/T-AKT、p-mTOR/T-mTOR蛋白表达，ELISA法检测细胞培养液中MMP9含量。结果 · ①TEM观察发现，褐藻糖胶处理组自噬小体增加。②褐藻糖胶可降低U266细胞迁移及侵袭能力，并呈现出剂量依赖性，氯喹可阻断该抑制作用。③ Western blotting结果显示，LC3-Ⅱ/LC3-Ⅰ、Beclin-1及MMP9蛋白表达随褐藻糖胶浓度增加而增加，P62、CXCR4、p-AKT/T-AKT及p-mTOR/T-mTOR蛋白表达随褐藻糖胶浓度增加而降低。④ELISA结果显示，褐藻糖胶处理组细胞培养液中MMP9的含量下降。结论 ·褐藻糖胶可诱导多发性骨髓瘤U266细胞自噬，抑制该细胞的迁移、侵袭能力。

关键词: 褐藻糖胶, 多发性骨髓瘤, 自噬, 迁移, 侵袭

Abstract:

Objective · To investigate effect of fucoidan on autophagy, migration and invasion in human multiple myeloma U266 cells. Methods · The U266 cells treated with fucoidan were cultured in vitro. The formation of autophagosomes was observed by transmission electron microscopy (TEM).Transwell assay was used to evaluate the effect of fucoidan on migratory and invasive abilities of U266 cells. The protein levels of LC3-Ⅱ/LC3-Ⅰ, Beclin-1, P62, MMP9, CXCR4, p-AKT/T-AKT, p-mTOR/T-mTOR were detected by Western blotting. MMP9 concentration in the culture medium was examined by ELISA. Results · ①Autophagosomes increased in fucoidan-treated cells compared with control group under TEM. ② Migratory and invasive abilities were inhibited by fucoidan in a dose-dependent manner, which were suppressed by chloroquine. ③Western blotting demonstrated that expression of LC3-Ⅱ/LC3-Ⅰ, Beclin-1 and MMP9 increased in fucoidan-treated cells, while P62, CXCR4, p-AKT/T-AKT and p-mTOR/T-mTOR decreased compared with control group. ④The result of ELISA showed that MMP9 concentration in the culture medium of fucoidan-treated cells significantly decreased. Conclusion · Fucoidan induces autophagy and inhibits migration and invasion in U266 cells.

Key words: fucoidan, multiple myeloma, autophagy, migration, invasion