BCAR1促进肺腺癌细胞增殖、生长及其互作蛋白网络的研究

茆春国; 蒋莎莎; 范小青; 隆谭; 金花; 谭群友; 邓波

doi:10.16016/j.1000-5404.202007249

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BCAR1促进肺腺癌细胞增殖、生长及其互作蛋白网络的研究

基础医学 | 更新时间：2026-01-09

- BCAR1促进肺腺癌细胞增殖、生长及其互作蛋白网络的研究
- Promoting effect of breast cancer anti-estrogen resistance 1 on proliferation and growth of lung adenocarcinoma cells and potential networks of its interacting proteins
- 第三军医大学学报 2020年42卷第24期页码：2366-2374
- 作者机构：
  
  400042 重庆，陆军军医大学大坪医院全军胸外科研究所
- 作者简介：
  
  [ 邓波，E-mail:dengbo@tmmu.edu.cn DENG Bo, E-mail:dengbo@tmmu.edu.cn
- 基金信息：
  
  国家自然基金面上项目(81572285);重庆市自然科学基金(CSTC2018jcyjAX0592)
- DOI：10.16016/j.1000-5404.202007249
  中图分类号： R341;R394.3;R734.2
- 收稿：2020-07-31，
  
  修回：2020-09-28，
  
  纸质出版：2020-12-30
- 稿件说明：
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茆春国, 蒋莎莎, 范小青, 等. BCAR1促进肺腺癌细胞增殖、生长及其互作蛋白网络的研究[J]. 第三军医大学学报, 2020,42(24):2366-2374.

Chunguo MAO, Shasha JIANG, Xiaoqing FAN, et al. Promoting effect of breast cancer anti-estrogen resistance 1 on proliferation and growth of lung adenocarcinoma cells and potential networks of its interacting proteins[J]. Journal of Third Military Medical University, 2020, 42(24): 2366-2374.
茆春国, 蒋莎莎, 范小青, 等. BCAR1促进肺腺癌细胞增殖、生长及其互作蛋白网络的研究[J]. 第三军医大学学报, 2020,42(24):2366-2374. DOI： 10.16016/j.1000-5404.202007249.

Chunguo MAO, Shasha JIANG, Xiaoqing FAN, et al. Promoting effect of breast cancer anti-estrogen resistance 1 on proliferation and growth of lung adenocarcinoma cells and potential networks of its interacting proteins[J]. Journal of Third Military Medical University, 2020, 42(24): 2366-2374. DOI： 10.16016/j.1000-5404.202007249.

摘要

目的

本研究旨在探索乳腺癌抗雌激素药物耐药蛋白1(breast cancer anti-estrogen resistance 1，BCAR1，p130cas)在肺癌发生发展中的生物功能与互作蛋白网络。

方法

① 免疫印迹实验(western blot)研究15对肺癌及癌旁组织中BCAR1表达情况，免疫组化(immunohistochemistry，IHC)分析54例早期肺腺癌组织芯片中BCAR1与预后的关系，并通过TCGA数据库进一步验证。②通过CRISPR/Cas9分别构建人肺腺癌H1975，H1299 BCAR1敲除(knock out，KO)细胞株，通过调取cDNA文库构建A549过表达(overexpression，OE)细胞株，四唑盐比色实验(MTT)检测细胞增殖能力、平板克隆形成实验检测细胞存活能力。③免疫共沉淀质谱分析(immunoprecipitation mass spectrometry，IP-MS)联合生信分析找出工具细胞即293T细胞中BCAR1的互作蛋白网络及可能的关键节点。④western blot验证细胞系BCAR1-KO或BCAR1-OE后关键节点基因的表达变化，并在肺癌组织芯片中予以验证基因表达的相关性。

结果

① western blot：BCAR1在肺腺癌组织较癌旁组织显著高表达(

0.05)；IHC：BCAR1高表达的早期肺癌患者预后差(HR=5.026，

=0.001)，TCGA：BCAR1高表达肺腺癌患者预后差(HR=1.5，

=0.008 7)。②成功构建BCAR1-KO与BCAR1-OE稳定细胞株

细胞增殖能力及细胞克隆形成率均随BCAR1敲除降低，过表达后升高。③IP-MS联合生信分析：哺乳动物酵母同源致命因子Sec13蛋白8 (MLST8)可能作为BCAR1的关键互作蛋白; ④相比癌旁组织，MLST8在癌组织中高表达(

0.05)

并与BCAR1表达显著正相关(

=0.422 1，

=0.001 5)。细胞系中MLST8的表达在BCAR1敲除后降低，过表达后升高。

结论

BCAR1在肺癌中发挥重要的促瘤效应。MLST8表达与BCAR1显著相关，可能是BCAR1的关键下游蛋白。

Abstract

Objective

To explore the biological functions of breast cancer anti-estrogen resistance 1 (BCAR1

also known as p130cas) in the incidence and development of lung cancer

and investigate the potential networks of its interacting proteins.

Methods

① Western blotting was performed to study the expression of BCAR1 in 15 pairs of lung cancer tissues and para-cancerous normal tissues

and immunohistochemical (IHC) assay was carried out in paraffin-embedded tissues from 54 patients with early stage lung cancer in order to determine the relationship between BCAR1 level and prognosis. TCGA analysis was also performed as further validation. ②BCAR1 knockout (KO) cell lines were established in H1975 and H1299 lung cancer cells

respectively

using CRISPR/Cas9. And A549 cells with overexpression (OE) of BCAR1 were constructed by transfection of BCAR1 cDNA. MTT analysis and plate colony formation assay were used to detect the proliferation and viability of the cells

respectively. ③Immunoprecipitation mass spectrometry (IP-MS) along with bioinformatics analysis was employed to identify the key protein of BCAR1 interacting networks in 293T tool cells. ④The expression variations of the key node gene were confirmed in BCAR1-KO and BCAR1-OE cells using Western blotting

and the correlation between the key node gene and BCAR1 was verified in the lung cancer tissue microarray.

Results

① The expression of BCAR1 was significantly higher in the lung cancer tissues than para-cancerous tissues (

0.05). Higher expression of BCAR1 was associated with worse prognosis in the patients with early-stage lung cancer (HR=5.026

= 0.001) and TCGA cohort study (HR=1.5

=0.008 7). ②BCAR1-KO and BCAR1-OE cells were successfully constructed

and the cell proliferation and colony formation were decreased with BCAR1-KO and increased following BCAR1-OE respectively. ③Mammalian lethal with SEC13 protein 8 (GβL

mLST8) was revealed to be a key protein of BCAR1 interacting network. ④MLST8 was significantly expressed at a higher level in the lung cancer tissues than the para-cancerous tissues (

0.05)

and its expression was positively correlated with the expression of BCAR1 (

=0.422 1

=0.001 5). Furthermore

the expression of MLST8 was decreased in BCAR1-KO cells and increased in BCAR1-OE cells.

Conclusion

BCAR1 plays a critical carcinogenetic role in lung cancer. MLST8 expression is significantly correlated with BCAR1

and may be a key downstream regulatory protein of BCAR1.

关键词

Keywords

references

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