中国组织工程研究 ›› 2021, Vol. 25 ›› Issue (13): 2055-2059.doi: 10.3969/j.issn.2095-4344.3507

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

神经胶质成熟因子γ抑制人结直肠癌LoVo细胞增殖并影响人脐静脉内皮细胞的骨架运动

王惠丽1,陈志江2,吴炳义3   

  1. 1广东省妇幼保健院检验科,广东省广州市   511442;2南方医科大学珠江医院儿科中心,广东省广州市   510280;3南方医科大学南方医院临床医学研究中心,广东省广州市   510515
  • 收稿日期:2020-06-28 修回日期:2020-07-03 接受日期:2020-07-21 出版日期:2021-05-08 发布日期:2020-12-28
  • 通讯作者: 吴炳义,博士,教授,南方医科大学南方医院临床医学研究中心,广东省广州市 510515
  • 作者简介:王惠丽,女,1987年生,山东省龙口市人,汉族,硕士,主管技师,主要从事结肠癌相关研究。
  • 基金资助:
    2020年广东省医学科学技术研究基金项目(A2020599),项目负责人:王惠丽

Glia maturation factor-gamma inhibits the proliferation of human colorectal cancer LoVo cells and affects the cytoskeletal motion of human umbilical vein endothelial cells

Wang Huili1, Chen Zhijiang2, Wu Bingyi3    

  1. 1Clinical Laboratory, Guangdong Women and Children Hospital, Guangzhou 511442, Guangdong Province, China; 2Pediatric Center, Zhujiang Hospital of Southern Medical University, Guangzhou 510280, Guangdong Province, China; 3Clinical Medicine Research Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China 
  • Received:2020-06-28 Revised:2020-07-03 Accepted:2020-07-21 Online:2021-05-08 Published:2020-12-28
  • Contact: Wu Bingyi, MD, Professor, Clinical Medicine Research Center, Nanfang Hospital, Southern Medical University, Guangzhou 510515, Guangdong Province, China
  • About author:Wang Huili, Master, Technician-in-charge, Clinical Laboratory, Guangdong Women and Children Hospital, Guangzhou 511442, Guangdong Province, China
  • Supported by:
    the Guangdong Medical Science and Technology Research Fund Project in 2020, No. A2020599 (to WHL) 

摘要:

文题释义:
神经胶质成熟因子γ(glia maturation factor gamma,GMFG):是一个分子质量为17 kD的小分子蛋白,与神经胶质成熟因子家族中的神经胶质成熟因子β高度同源,是细胞骨架运动重建过程中ADF/cofilin超家族蛋白成员之一。
细胞骨架:是指真核细胞中的蛋白纤维网络结构,主要由微管、微丝及中间纤维组成。细胞骨架的主要作用是完成细胞的运动、维持细胞的形态以及胞吞、胞吐、信息传递、能量转换等。

背景:神经胶质成熟因子γ(glia maturation factor-gamma,GMFG)是细胞骨架运动重建过程中ADF/cofilin超家族蛋白成员之一,可以通过调节肌动蛋白介导细胞骨架重组参与细胞运动的调控。作者前期发现GMFG的高表达与结直肠癌肿瘤患者临床病理相关,但具体的上游及下游机制有待探究。
目的:探索GMFG对人脐静脉内皮细胞骨架及LoVo细胞增殖的影响。
方法:①将人脐静脉内皮细胞接种在激光共聚焦皿中,待细胞贴壁稳定生长后,细胞免疫荧光染色观察GMFG的表达与人脐静脉内皮细胞骨架蛋白F-actin表达的关系;然后加入秋水仙素抑制细胞有丝分裂,分为对照组、0.5 mg/L秋水仙素组、1.0 mg/L秋水仙素组,流式细胞术观察3组细胞周期的变化,Western blot蛋白印迹观察3组细胞GMFG蛋白表达;②将人结直肠癌LoVo细胞接种在激光共聚焦皿中,待细胞贴壁稳定生长后,细胞免疫荧光染色观察GMFG的表达与细胞周期的相关性,然后采用siRNA技术干扰LoVo细胞中GMFG的表达,分为空白对照组、空转染组和siRNA-GMFG组,Edu实验检测细胞增殖率的变化。
结果与结论:①在人脐静脉内皮细胞中,GMFG的表达与人脐静脉内皮细胞骨架运动有关,细胞骨架回缩时GMFG表达增多;秋水仙素抑制人脐静脉内皮细胞有丝分裂后,随秋水仙素用量增加G2/M期细胞占比增加,GMFG蛋白表达下降;②在LoVo细胞中,GMFG的表达强度与细胞有丝分裂有关,在细胞有丝分裂中后期GMFG表达增强;③siRNA技术干扰LoVo细胞GMFG表达后,细胞增殖率下降;④结果表明,干扰GMFG表达能够抑制人结直肠癌LoVo细胞的增殖率,并且细胞骨架运动与GMFG的表达存在一定的相关性。

https://orcid.org/0000-0002-2977-6465(王惠丽) 

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 人脐静脉内皮细胞, 细胞骨架, LoVo细胞, 细胞增殖, 神经胶质成熟因子γ, 秋水仙素, 肠癌

Abstract: BACKGROUND: Glial maturation factor-gamma (GMFG) is one of the members of the ADF/cofilin superfamily protein in the process of cytoskeleton remodeling. It can regulate the cell movement by regulating actin-mediated cytoskeleton reorganization. The authors previously found that the high expression of GMFG is associated with the clinicopathological features of colorectal cancer patients, but the specific upstream and downstream mechanisms need to be explored.
OBJECTIVE: To study the effects of GMFG on cytoskeleton and LoVo cell proliferation.
METHODS:  (1) Human umbilical vein endothelial cells were inoculated in a laser confocal dish. After the cells grew stably, the correlation between the expression of GMFG and the expression of cytoskeletal protein F-actin was observed by immunofluorescence staining. Colchicine inhibited mitosis. The cells were divided into control group, 0.5 mg/L colchicine group and 1.0 mg/L colchicine group. The cell cycle was observed by flow cytometry and GMFG protein expression was observed by western blot assay. (2) Human colorectal cancer LoVo cells were inoculated in a laser confocal dish. After the cells grew stably, the correlation between GMFG expression and cell cycle was observed by immunofluorescence staining. Afterwards, siRNA was used to interfere the expression of GMFG in LoVo cells. The LoVo cells were divided into blank control group, empty transfer group and siRNA-GMFG group. The cell proliferation rate was detected by Edu assay. 
RESULTS AND CONCLUSION: (1) In human umbilical vein endothelial cells, the expression of GMFG was associated with the cytoskeletal motion of human umbilical vein endothelial cells, and the expression of GMFG increased when the cytoskeleton retracted. After colchicine inhibited the mitosis of human umbilical vein endothelial cells, the proportion of cells in G2/M phase increased and the expression of GMFG protein decreased with the increase of colchicine dosage. (2) In LoVo cells, the expression intensity of GMFG was associated with mitosis, and the expression of GMFG was enhanced in the middle and late stages of cell mitosis. (3) After siRNA interference with GMFG in LoVo cells, the cell proliferation rate was decreased. (4) Results verify that interference with GMFG can inhibit the proliferation rate of LoVo cells of human colorectal cancer, and there is a certain correlation between cytoskeletal motion and GMFG expression. 


Key words: human umbilical vein endothelial cells, cytoskeleton, LoVo cells, cell proliferation, glia maturation factor-gamma, colchicine, colorectal cancer

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