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Article

Increased expression of Lgr5 is associated with chemotherapy resistance in human gastric cancer

Corrigendum in: /10.3892/or.2019.7120
  • Authors:
    • Hong-Qing Xi
    • Jian-Xin Cui
    • Wei-Song  Shen
    • Xiao-Song  Wu
    • Shi‑Bo  Bian
    • Ji-Yang  Li
    • Zhou  Song
    • Bo  Wei
    • Lin Chen
  • View Affiliations / Copyright

    Affiliations: Department of General Surgery, Chinese People's Liberation Army General Hospital, Beijing 100853, P.R. China
  • Pages: 181-188
    |
    Published online on: May 22, 2014
       https://doi.org/10.3892/or.2014.3207
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Abstract

Leucine-rich repeat-containing G protein-coupled receptor 5 (Lgr5), a marker of adult stem cells and cancer stem cells, plays important roles in tumor progression. Furthermore, Lgr5 also contributes to chemoradiotherapy resistance. However, the function of Lgr5 in the prediction of preoperative chemotherapy efficacy has not been reported. We evaluated the potential of Lgr5 in predicting tumor response and overall survival in advanced gastric cancer treated with preoperative chemotherapy. The association between Lgr5 and chemotherapy resistance was also investigated in gastric cancer cell lines. Hematoxylin and eosin staining and immunohistochemical analysis of Lgr5 expression were performed in 68 cases of gastric cancer treated with preoperative chemotherapy. Lgr5 expression was specifically silenced in the AGS gastric cancer cell lines by RNA interference. Levels of Lgr5 mRNA and protein in cell lines were detected by quantitative reverse transcription-polymerase chain reaction or western blotting. Cell viability was evaluated by an MTT assay. Cell apoptosis was assessed by Annexin V-FITC/propidium iodide dual staining analysis. We found that Lgr5 expression was significantly associated with tumor regression grade after preoperative chemotherapy. The rate of positive Lgr5 expression was significantly higher in patients with poor tumor regression compared with those exhibiting tumor regression (P=0.001). Lgr5-positive patients had a significantly shorter survival time than Lgr5-negative patients (P=0.001). Inhibition of Lgr5 expression with small interfering RNA increased the sensitivity of AGS gastric cancer cells to chemotherapy. Our findings suggest that Lgr5 expression may be implicated in the chemoresistance of gastric cancer cells and is a potential novel biomarker for predicting response to chemotherapy and prognosis in gastric cancer patients, and may also represent a potential new therapeutic target for cancer therapy.
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Copy and paste a formatted citation
Spandidos Publications style
Xi H, Cui J, Shen W, Wu X, Bian SB, Li J, Song Z, Wei B and Chen L: Increased expression of Lgr5 is associated with chemotherapy resistance in human gastric cancer Corrigendum in /10.3892/or.2019.7120. Oncol Rep 32: 181-188, 2014.
APA
Xi, H., Cui, J., Shen, W., Wu, X., Bian, S., Li, J. ... Chen, L. (2014). Increased expression of Lgr5 is associated with chemotherapy resistance in human gastric cancer Corrigendum in /10.3892/or.2019.7120. Oncology Reports, 32, 181-188. https://doi.org/10.3892/or.2014.3207
MLA
Xi, H., Cui, J., Shen, W., Wu, X., Bian, S., Li, J., Song, Z., Wei, B., Chen, L."Increased expression of Lgr5 is associated with chemotherapy resistance in human gastric cancer Corrigendum in /10.3892/or.2019.7120". Oncology Reports 32.1 (2014): 181-188.
Chicago
Xi, H., Cui, J., Shen, W., Wu, X., Bian, S., Li, J., Song, Z., Wei, B., Chen, L."Increased expression of Lgr5 is associated with chemotherapy resistance in human gastric cancer Corrigendum in /10.3892/or.2019.7120". Oncology Reports 32, no. 1 (2014): 181-188. https://doi.org/10.3892/or.2014.3207
Copy and paste a formatted citation
x
Spandidos Publications style
Xi H, Cui J, Shen W, Wu X, Bian SB, Li J, Song Z, Wei B and Chen L: Increased expression of Lgr5 is associated with chemotherapy resistance in human gastric cancer Corrigendum in /10.3892/or.2019.7120. Oncol Rep 32: 181-188, 2014.
APA
Xi, H., Cui, J., Shen, W., Wu, X., Bian, S., Li, J. ... Chen, L. (2014). Increased expression of Lgr5 is associated with chemotherapy resistance in human gastric cancer Corrigendum in /10.3892/or.2019.7120. Oncology Reports, 32, 181-188. https://doi.org/10.3892/or.2014.3207
MLA
Xi, H., Cui, J., Shen, W., Wu, X., Bian, S., Li, J., Song, Z., Wei, B., Chen, L."Increased expression of Lgr5 is associated with chemotherapy resistance in human gastric cancer Corrigendum in /10.3892/or.2019.7120". Oncology Reports 32.1 (2014): 181-188.
Chicago
Xi, H., Cui, J., Shen, W., Wu, X., Bian, S., Li, J., Song, Z., Wei, B., Chen, L."Increased expression of Lgr5 is associated with chemotherapy resistance in human gastric cancer Corrigendum in /10.3892/or.2019.7120". Oncology Reports 32, no. 1 (2014): 181-188. https://doi.org/10.3892/or.2014.3207
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