LncRNA PRKCQ‐AS1 regulates paclitaxel resistance in triple‐negative breast cancer cells through miR‐361‐5p/PIK3C3 mediated autophagy

Author:

Zheng Shurong1,Fu Weida1,Huang Qidi1,Zhou Jieyu1,Lu Kangkang1,Gu Junwei2,Ma Ruimin3,Guo Guilong1ORCID

Affiliation:

1. Department of Breast Surgery The First Affiliated Hospital of Wenzhou Medical University Wenzhou China

2. Department of Breast Surgery Hangzhou Hospital of Traditional Chinese Medicine Hangzhou China

3. Department of Breast Surgery The Second Affiliated Hospital of Wenzhou Medical University Wenzhou China

Abstract

AbstractPaclitaxel (PTX) resistance is a key cause of chemotherapy failure in patients with triple negative breast cancer (TNBC). The aim of this study is to investigate the effect and mechanism of long non‐coding RNA (lncRNA) on the PTX resistance of TNBC cells through autophagy. MDA‐MB‐231 cells are used to induce the PTX‐resistant TNBC cell line MDA‐MB‐231.PR (MDR) by increasing dose intermittently. Quantitative real‐time polymerase chain reaction (qRT‐PCR) was used to validate the mRNA levels of phosphoinositide‐3‐kinase class 3 (PIK3C3), miR‐361‐5p and lncRNA PRKCQ‐AS1 in the cells, and Western blot analysis was used to detect the protein expressions of PIK3C3, autophagy‐related, drug‐resistant and apoptosis‐related genes. MDC staining detected the formation of autophagic vacuoles. The interactions between miR‐361‐5p and PIK3C3 and between lncRNA PRKCQ‐AS1 and miR‐361‐5p were verified by dual‐luciferase assay. Cell viability, apoptosis, migration and invasion were assessed by performing MTT, flow cytometry assay, and transwell assay. The mRNA level of miR‐361‐5p and the autophagy and drug resistance levels of TNBC PTX‐resistant cells were significantly up‐regulated. miR‐361‐5p could target autophagy‐related gene PIK3C3, and overexpression of miR‐361‐5p could down‐regulate PIK3C3 protein expression and autophagy level and PTX resistance of MDR cells. LncRNA PRKCQ‐AS1 was selected through bioanalysis, and miR‐361‐5p could target lncRNA PRKCQ‐AS1. In addition, lncRNA PRKCQ‐AS1 level was up‐regulated in TNBC PTX‐resistant cells, and knockdown of lncRNA PRKCQ‐AS1 could weaken autophagy and drug resistance level and could promote cell apoptosis. Overexpression of lncRNA PRKCQ‐AS1 reversed the pro‐apoptotic effect and down‐regulation of autophagy and resistance levels was induced by miR‐361‐5p. In vivo experiments were performed to verify the role of lncRNA PRKCQ‐AS1. We demonstrate that down‐regulation of lncRNA PRKCQ‐AS1 weakened PTX resistance and promoted cell apoptosis by miR‐361‐5p/PIK3C3 mediated autophagy.

Publisher

Wiley

Subject

Physiology (medical),Pharmacology,Physiology

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3