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中国临床药理学与治疗学 ›› 2021, Vol. 26 ›› Issue (6): 616-623.doi: 10.12092/j.issn.1009-2501.2021.06.003

• 基础研究 • 上一篇    下一篇

下调lncRNA LINC00176对肺癌A549/DDP细胞顺铂耐药和自噬的影响

崔华1,燕红霞2,尹梅1   

  1. 1宁夏医科大学总医院呼吸与危重症医学科,银川 750001,宁夏;2银川市第二人民医院神经内科,银川 750011,宁夏
  • 收稿日期:2021-03-19 修回日期:2021-06-15 出版日期:2021-06-26 发布日期:2021-07-06
  • 通讯作者: 尹梅,女,硕士,主任医师,研究方向:肺癌、肺血管病。 Tel: 0951-6746173 E-mail: dmeiyin@163.com
  • 作者简介:崔华,女,本科,主治医师,研究方向:呼吸与危重症医学科。 Tel: 13629589164 E-mail: drb261@163.com
  • 基金资助:
    宁夏回族自治区自然科学基金项目(2017A0484)

Effects of down-regulating lncRNA LINC00176 on cisplatin resistance and autophagy in lung cancer A549/DDP cells

CUI Hua 1, YAN Hongxia 2, YIN Mei 1   

  1. 1 Department of Respiratory and Critical Medicine, General Hospital of Ningxia Medical University, Yinchuan 750001, Ningxia, China; 2 Department of Neurology, the Second People's Hospital of Yinchuan 750011, Ningxia, China
  • Received:2021-03-19 Revised:2021-06-15 Online:2021-06-26 Published:2021-07-06

摘要: 目的:研究下调lncRNA LINC00176对肺癌A549/DDP细胞顺铂耐药和自噬的影响及机制。方法:qRT-PCR方法测定正常支气管上皮16HBE细胞和肺癌A549、A549/DDP、NCI-H1299、SK-MES-1细胞中LINC00176的表达。将A549/DDP细胞分成对照组、si-NC组、si-LINC00176组、si-LINC00176+Anti-miR-NC组、si-LINC00176+Anti-miR-138-5p组。MTT实验检测顺铂对A549/DDP的半数抑制浓度(IC50)。流式细胞术测定细胞凋亡。Western blot测定LC3-I、LC3-II、Beclin 1、C-Caspase-3蛋白表达。利用荧光素酶报告系统鉴定LINC00176和miR-138-5p的靶向关系。结果:与16HBE细胞比较,A549、A549/DDP、NCI-H1299、SK-MES-1细胞中LINC00176表达水平显著升高(P<0.01)。与A549细胞比较,A549/DDP细胞中LINC00176表达水平显著升高(P<0.01)。与对照组、si-NC组比较,si-LINC00176组A549/DDP细胞IC50显著降低(P<0.01),LC3-II/LC3-I、Beclin 1蛋白表达显著降低(P<0.01),凋亡率、C-Caspase-3蛋白表达、miR-138-5p表达水平显著升高(P<0.01)。LINC00176与miR-138-5p直接结合。与si-LINC00176+Anti-miR-NC组比较,si-LINC00176+Anti-miR-138-5p组A549/DDP细胞IC50显著升高(P<0.01),LC3-II/LC3-I、Beclin 1蛋白表达显著升高(P<0.01),凋亡率、C-Caspase-3蛋白表达显著降低(P<0.01)。 结论:下调lncRNA LINC00176通过靶向上调miR-138-5p能够抑制肺癌A549/DDP细胞顺铂耐药,抑制细胞自噬,诱导细胞凋亡。

关键词: 肺癌, 顺铂耐药, 自噬, LINC00176, miR-138-5p

Abstract: AIM: To study the effects and mechanism of down-regulating lncRNA LINC00176 on cisplatin resistance and autophagy in lung cancer A549/DDP cells. METHODS: The qRT-PCR method was used to determine the expression changes of LINC00176 in normal bronchial epithelial 16HBE cells and lung cancer A549, A549/DDP, NCI-H1299 and SK-MES-1 cells. A549/DDP cells were divided into Control group, si-NC group, and si-LINC00176 group, si-LINC00176+ Anti-miR-NC group, and si-LINC00176+ Anti-miR-138-5p group. MTT experiment detected the half inhibitory concentration (IC50) of cisplatin on A549/DDP. Flow cytometry was used to measure cell apoptosis. Western blot was used to determine the protein expression of LC3-I, LC3-II, Beclin 1, C-Caspase-3. The luciferase reporter system was used to identify the targeting relationship between LINC00176 and miR-138-5p. RESULTS: The expression level of LINC00176 in A549, A549/DDP, NCI-H1299 and SK-MES-1 cells was higher than that in 16HBE cells (P<0.01). The expression level of LINC00176 in A549/DDP cells was significantly higher than that in A549 cells (P<0.01). Compared with the Control and si-NC groups, the IC50 of A549/DDP cells in the si-LINC00176 group was significantly reduced (P<0.01), the expression of LC3-II/LC3-I, Beclin 1 protein was significantly reduced (P<0.01), the apoptosis rate, and the expression of C-Caspase-3 protein and miR-138-5p were significantly increased (P<0.01). LINC00176 directly bound to miR-138-5p. Compared with the si-LINC00176+Anti-miR-NC group, the IC50 of A549/DDP cells in the si-LINC00176+Anti-miR-138-5p group was significantly increased (P<0.01), and the expression of LC3-II/LC3-I and Beclin 1 protein was significantly increased (P<0.01), the apoptosis rate and C-Caspase-3 protein expression were significantly reduced (P<0.01).CONCLUSION: Down-regulating lncRNA LINC00176 could inhibit cisplatin resistance, inhibit autophagy and induce apoptosis in lung cancer A549/DDP cells by targeting and up-regulating miR-138-5p.

Key words: lung cancer, cisplatin resistance, autophagy, LINC00176, miR-138-5p

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