Open Access

Silenced PITX1 promotes chemotherapeutic resistance to 5‑fluorocytosine and cisplatin in gastric cancer cells

  • Authors:
    • Xiaohui Shen
    • Yuejun Gu
    • Shengling Yu
    • Pihai Gong
    • Yuhang Mao
    • Yiping Li
    • Ying Zheng
    • Fengchang Qiao
    • Zhujiang Zhao
    • Hong Fan
  • View Affiliations

  • Published online on: April 1, 2019     https://doi.org/10.3892/etm.2019.7459
  • Pages: 4046-4054
  • Copyright: © Shen et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Resistance to chemotherapeutic drugs leads to a poor prognosis in gastric cancer (GC). The present study aimed to assess the association between pituitary homeobox paired homeodomain transcription 1 (PITX1) expression and the sensitivity of GC cells to the chemotherapeutic drugs 5‑fluorouracil (5‑FU) and cisplatin (CDDP). In the present study, the gastric cancer cell lines GES‑1, AGS, BGC‑823, MCG‑803 and SGC‑7901 were used. The expression of PITX1 was determined via reverse transcription‑quantitative polymerase chain reaction in GC cell lines. AGS and BGC‑823 cells, which exhibit a decreased PITX1 expression, were transfected with a PITX1 cDNA construct and its control vector. MCG‑803 and SGC‑7901 cells, which exhibit an increased PITX1 expression, were transfected with siRNA against PITX1 and its control scramble sequence. A Cell Counting kit‑8 assay was performed to determine the impact of PITX1 expression on the sensitivity of GC cells to 5‑FU and CDDP. The Cancer Genome Atlas database was used to analyze the expression of PITX1 with GC prognosis in the Asian population and to assess the potential mechanism of PITX1 in 5‑FU and CDDP resistance. The results revealed that the overexpression of PIXT1 increased the sensitivity of GC cells to 5‑FU/CDDP. The combination of 5‑FU/CDDP and PITX1 overexpression also reduced the proliferation of GC cells. Additionally, PIXT1 knockdown decreased the sensitivity of GC cells to 5‑FU/CDDP. TCGA data revealed that a lower expression of PITX1 is exhibited in Asian GC patients than in normal individuals. GC patients with a lower expression of PITX1 had a poor prognosis. The expression of PITX1 affected the sensitivity of GC cells to 5‑FU/CDDP, indicating that PITX1 may increase the efficacy of treatment in GC patients.
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May-2019
Volume 17 Issue 5

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Copy and paste a formatted citation
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Spandidos Publications style
Shen X, Gu Y, Yu S, Gong P, Mao Y, Li Y, Zheng Y, Qiao F, Zhao Z, Fan H, Fan H, et al: Silenced PITX1 promotes chemotherapeutic resistance to 5‑fluorocytosine and cisplatin in gastric cancer cells. Exp Ther Med 17: 4046-4054, 2019
APA
Shen, X., Gu, Y., Yu, S., Gong, P., Mao, Y., Li, Y. ... Fan, H. (2019). Silenced PITX1 promotes chemotherapeutic resistance to 5‑fluorocytosine and cisplatin in gastric cancer cells. Experimental and Therapeutic Medicine, 17, 4046-4054. https://doi.org/10.3892/etm.2019.7459
MLA
Shen, X., Gu, Y., Yu, S., Gong, P., Mao, Y., Li, Y., Zheng, Y., Qiao, F., Zhao, Z., Fan, H."Silenced PITX1 promotes chemotherapeutic resistance to 5‑fluorocytosine and cisplatin in gastric cancer cells". Experimental and Therapeutic Medicine 17.5 (2019): 4046-4054.
Chicago
Shen, X., Gu, Y., Yu, S., Gong, P., Mao, Y., Li, Y., Zheng, Y., Qiao, F., Zhao, Z., Fan, H."Silenced PITX1 promotes chemotherapeutic resistance to 5‑fluorocytosine and cisplatin in gastric cancer cells". Experimental and Therapeutic Medicine 17, no. 5 (2019): 4046-4054. https://doi.org/10.3892/etm.2019.7459