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Article

LRPPRC contributes to the cisplatin resistance of lung cancer cells by regulating MDR1 expression

  • Authors:
    • Yunfeng Hu
    • Jie Cui
    • Lei Jin
    • Yani Su
    • Xiaozhi Zhang
  • View Affiliations / Copyright

    Affiliations: Department of Radiotherapy, The First Affiliated Hospital, Xi'an Jiaotong University, Xi'an, Shaanxi 710061, P.R. China, Department of Oncology, The First Affiliated Hospital, Xi'an Medical University, Xi’an, Shaanxi 710077, P.R. China, School of General Medicine, Xi'an Medical University, Xi’an, Shaanxi 710077, P.R. China, Department of Oncology, Yanan University Affiliated Hospital, Yanan University, Yan'an, Shaanxi 716000, P.R. China
  • Article Number: 4
    |
    Published online on: January 28, 2021
       https://doi.org/10.3892/or.2021.7955
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Abstract

The development of multidrug resistance is the major obstacle to successful lung cancer chemotherapy. Cancer cells gain resistance through increased levels of P‑glycoprotein (P‑gp), which is encoded by the multidrug resistance‑associated protein 1 (MDR1) gene. Leucine‑rich PPR motif‑containing protein (LRPPRC), a member of the PPR family, has been verified to regulate the transcription of MDR1. This regulation is influenced by the methylation status of the GC ‑100 box in the MDR1 promoter. The present study aimed to investigate the effect of LRPPRC on cisplatin (DDP) resistance in lung cancer cells and explore the underlying mechanism. DDP‑resistant non‑small cell lung cancer cell lines (A549/DDP, H1299/DDP) were generated. The expression levels of LRPPRC and P‑gp/MDR1, investigated by qPCR and western blot analysis, were increased in the A549/DDP and H1299/DDP cells compared with that in the parental cells. LRPPRC silencing with shRNA increased DDP sensitivity in vitro and in vivo. LRPPRC silencing inhibited the level of LRPPRC binding with the MDR1 promoter, investigated by chromatin immunoprecipitation‑qPCR, and the corresponding MDR1 expression. Demethylation treatment rescued the decrease in the level of LRPPRC binding with MDR1 and the corresponding expression of MDR1 and the increase in DDP sensitivity due to LRPPRC silencing. Our study suggests that LRPPRC contributes to DDP resistance in lung cancer cells by regulating MDR1 transcription. Thus, LRPPRC may serve as a potential molecular target for chemo‑resistance reversal in lung cancer.
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Copy and paste a formatted citation
Spandidos Publications style
Hu Y, Cui J, Jin L, Su Y and Zhang X: LRPPRC contributes to the cisplatin resistance of lung cancer cells by regulating <em>MDR1</em> expression. Oncol Rep 45: 4, 2021.
APA
Hu, Y., Cui, J., Jin, L., Su, Y., & Zhang, X. (2021). LRPPRC contributes to the cisplatin resistance of lung cancer cells by regulating <em>MDR1</em> expression. Oncology Reports, 45, 4. https://doi.org/10.3892/or.2021.7955
MLA
Hu, Y., Cui, J., Jin, L., Su, Y., Zhang, X."LRPPRC contributes to the cisplatin resistance of lung cancer cells by regulating <em>MDR1</em> expression". Oncology Reports 45.4 (2021): 4.
Chicago
Hu, Y., Cui, J., Jin, L., Su, Y., Zhang, X."LRPPRC contributes to the cisplatin resistance of lung cancer cells by regulating <em>MDR1</em> expression". Oncology Reports 45, no. 4 (2021): 4. https://doi.org/10.3892/or.2021.7955
Copy and paste a formatted citation
x
Spandidos Publications style
Hu Y, Cui J, Jin L, Su Y and Zhang X: LRPPRC contributes to the cisplatin resistance of lung cancer cells by regulating <em>MDR1</em> expression. Oncol Rep 45: 4, 2021.
APA
Hu, Y., Cui, J., Jin, L., Su, Y., & Zhang, X. (2021). LRPPRC contributes to the cisplatin resistance of lung cancer cells by regulating <em>MDR1</em> expression. Oncology Reports, 45, 4. https://doi.org/10.3892/or.2021.7955
MLA
Hu, Y., Cui, J., Jin, L., Su, Y., Zhang, X."LRPPRC contributes to the cisplatin resistance of lung cancer cells by regulating <em>MDR1</em> expression". Oncology Reports 45.4 (2021): 4.
Chicago
Hu, Y., Cui, J., Jin, L., Su, Y., Zhang, X."LRPPRC contributes to the cisplatin resistance of lung cancer cells by regulating <em>MDR1</em> expression". Oncology Reports 45, no. 4 (2021): 4. https://doi.org/10.3892/or.2021.7955
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