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Article

Circadian clock gene Per2 downregulation in non‑small cell lung cancer is associated with tumour progression and metastasis

  • Authors:
    • Run Xiang
    • Yue Cui
    • Yanping Wang
    • Tianpeng Xie
    • Xiaojun Yang
    • Zhu Wang
    • Juan Li
    • Qiang Li
  • View Affiliations / Copyright

    Affiliations: Department of Thoracic Surgery, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610041, P.R. China, Department of Thoracic Surgery, First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650000, P.R. China, Laboratory of Molecular Diagnosis of Cancer, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China, Department of Thoracic Surgery, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610041, P.R. China, Laboratory of Molecular Diagnosis of Cancer, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China, Department of Chemotherapy, Sichuan Cancer Hospital and Institute, Sichuan Cancer Center, School of Medicine, University of Electronic Science and Technology of China, Chengdu, Sichuan 610041, P.R. China
  • Pages: 3040-3048
    |
    Published online on: September 13, 2018
       https://doi.org/10.3892/or.2018.6704
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Abstract

Period2 (Per2) is a key circadian clock gene, and its deregulation contributes to tumour development, including breast cancer. However, the biological function and clinicopathological significance of Per2 in non‑small cell lung cancer (NSCLC) remain unclear. The present study aimed to explore the role of Per2 and its relative clinical significance in NSCLC. To analyse Per2 expression in NSCLC specimens, reverse transcription‑quantitative polymerase chain reaction was performed, and the results indicated that Per2 expression was markedly downregulated in 83.87% (26/31) of NSCLC samples compared with their adjacent matched tissues. Increased Per2 expression was associated with increased differentiation (P<0.01) and reduced lymph node metastasis (P<0.0001). Functional studies identified that enhancing Per2 expression in A549 cells by lentivirus transduction not only significantly suppressed cell growth, migration and invasion (P<0.05) but also inhibited NSCLC growth and metastasis in vivo. Animal studies and histopathological analysis identified that Per2 expression in A549 cells not only markedly increased expression of tumour anti‑oncogenes Bax, P53 and P21 but also inhibited expression of pro‑oncogenes vascular endothelial growth factor, CD44 and c‑Myc. These results indicate that the loss of Per2 is one of the factors underlying tumourigenesis in NSCLC, and it may function as a novel molecular target for NSCLC.
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Copy and paste a formatted citation
Spandidos Publications style
Xiang R, Cui Y, Wang Y, Xie T, Yang X, Wang Z, Li J and Li Q: Circadian clock gene Per2 downregulation in non‑small cell lung cancer is associated with tumour progression and metastasis. Oncol Rep 40: 3040-3048, 2018.
APA
Xiang, R., Cui, Y., Wang, Y., Xie, T., Yang, X., Wang, Z. ... Li, Q. (2018). Circadian clock gene Per2 downregulation in non‑small cell lung cancer is associated with tumour progression and metastasis. Oncology Reports, 40, 3040-3048. https://doi.org/10.3892/or.2018.6704
MLA
Xiang, R., Cui, Y., Wang, Y., Xie, T., Yang, X., Wang, Z., Li, J., Li, Q."Circadian clock gene Per2 downregulation in non‑small cell lung cancer is associated with tumour progression and metastasis". Oncology Reports 40.5 (2018): 3040-3048.
Chicago
Xiang, R., Cui, Y., Wang, Y., Xie, T., Yang, X., Wang, Z., Li, J., Li, Q."Circadian clock gene Per2 downregulation in non‑small cell lung cancer is associated with tumour progression and metastasis". Oncology Reports 40, no. 5 (2018): 3040-3048. https://doi.org/10.3892/or.2018.6704
Copy and paste a formatted citation
x
Spandidos Publications style
Xiang R, Cui Y, Wang Y, Xie T, Yang X, Wang Z, Li J and Li Q: Circadian clock gene Per2 downregulation in non‑small cell lung cancer is associated with tumour progression and metastasis. Oncol Rep 40: 3040-3048, 2018.
APA
Xiang, R., Cui, Y., Wang, Y., Xie, T., Yang, X., Wang, Z. ... Li, Q. (2018). Circadian clock gene Per2 downregulation in non‑small cell lung cancer is associated with tumour progression and metastasis. Oncology Reports, 40, 3040-3048. https://doi.org/10.3892/or.2018.6704
MLA
Xiang, R., Cui, Y., Wang, Y., Xie, T., Yang, X., Wang, Z., Li, J., Li, Q."Circadian clock gene Per2 downregulation in non‑small cell lung cancer is associated with tumour progression and metastasis". Oncology Reports 40.5 (2018): 3040-3048.
Chicago
Xiang, R., Cui, Y., Wang, Y., Xie, T., Yang, X., Wang, Z., Li, J., Li, Q."Circadian clock gene Per2 downregulation in non‑small cell lung cancer is associated with tumour progression and metastasis". Oncology Reports 40, no. 5 (2018): 3040-3048. https://doi.org/10.3892/or.2018.6704
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