Cited by 78Chronic Myeloid Leukemia TreatmentsCancer-related molecular mechanisms researchDrug Transport and Resistance Mechanisms

LncRNA MEG3 Regulates Imatinib Resistance in Chronic Myeloid Leukemia via Suppressing MicroRNA-21

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Zhou, Xiangyu, Yuan, Ping, Liu, Qi, Liu, Zhiqiang·2017·Biomolecules & Therapeutics

Abstract

Imatinib resistance has become a major clinical problem for chronic myeloid leukemia. The aim of the present study was to investigate the involvement of MEG3, a lncRNA, in imatinib resistance and demonstrate its underlying mechanisms. RNAs were extracted from CML patients' peripheral blood cells and human leukemic K562 cells, and the expression of MEG3 was measured by RT-qPCR. Cell proliferation and cell apoptosis were evaluated. Western blotting was used to measure the protein expression of several multidrug resistant transporters. Luciferase reporter assay was performed to determine the binding between MEG3 and miR-21. Our results showed that MEG3 was significantly decreased in imatinib-resistant CML patients and imatinib-resistant K562 cells. Overexpression of MEG3 in imatinib-resistant K562 cells markedly decreased cell proliferation, increased cell apoptosis, reversed imatinib resistance, and reduced the expression of MRP1, MDR1, and ABCG2. Interestingly, MEG3 binds to miR-21. MEG3 and miR-21 were negatively correlated in CML patients. In addition, miR-21 mimics reversed the phenotype of MEG3-overexpression in imatinib-resistant K562 cells. Taken together, MEG3 is involved in imatinib resistance in CML and possibly contributes to imatinib resistance through regulating miR-21, and subsequent cell proliferation, apoptosis and expression of multidrug resistant transporters.

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Authors
Zhou, X., Yuan, P., Liu, Q., & Liu, Z.
Affiliations
  • Southwest Medical University (CN)
  • Nanchong Central Hospital (CN)
  • The University of Texas MD Anderson Cancer Center (US)
Corresponding author
Zhou, Xiangyu
Venue
Biomolecules & Therapeutics
Published
2017-09-01
Volume
25
Issue
5
Pages
490-496
ISSN
  • 1976-9148 (ISSN-L)
  • 2005-4483
OpenAlex
W2587945849
Cited by
78
References
29
Citations by year
2026: 1 · 2025: 7 · 2024: 8 · 2023: 2 · 2022: 13 · 2021: 6 · 2020: 16 · 2019: 4 · 2018: 12 · 2017: 9
FWCI
8.64
Type
journal article
Language
en
Open access
Locations
  • Biomolecules & Therapeutics (publishedVersion)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Hematology › Chronic Myeloid Leukemia Treatments
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer-related molecular mechanisms research
  • Health Sciences › Medicine › Oncology › Drug Transport and Resistance Mechanisms
Keywords
MEG3, long non-coding RNA, imatinib resistance, chronic myeloid leukemia, miR-21, multidrug resistance transporters, MRP1, MDR1, ABCG2, cell proliferation, apoptosis, K562 cells

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