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Loss of Protein Tyrosine Phosphatase Receptor J Expression Predicts an Aggressive Clinical Course in Patients with Esophageal Squamous Cell Carcinoma

  • Original Article
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Pathology & Oncology Research

Abstract

Protein Tyrosine Phosphatase Receptor J (PTPRJ) has been reported to be a tumor suppressor in various human cancers. The aim of this study was to investigate the clinical significance of PTPRJ in ESCC patients and its effects on biological behaviors of ESCC cells. PTPRJ expression, at mRNA and protein levels, were respectively detected by quantitative real-time PCR, western blot and immunohistochemistry, based on 106 newly diagnosed ESCC patients. The associations between PTPRJ expression and clinicopathological characteristics of ESCC patients were statistically analyzed. Then, the effects of PTPRJ in migration and invasion were determined by wound healing and transwell assays based on ESCC cell line transfected with siRNA or expression vector of PTPRJ. Expression of PTPRJ at mRNA and protein levels were both significantly lower in ESCC tissues than those in normal esophageal mucosa. Immunohistochemistry showed that PTPRJ protein was localized in the cytoplasm of cancer cells in ESCC tissues. In addition, PTPRJ downregulation was found to be closely correlated with advanced tumor stage (P = 0.01) and poor differentiation (P = 0.03). Moreover, knockdown of PTPRJ in KYSE510 cells could significantly promote cell migration and invasion (both P < 0.05), which were reversed by the restoration of PTPRJ expression in vitro (both P < 0.05). Our data offer the convincing evidence that loss of PTPRJ expression may predict an aggressive clinical course in ESCC patients. PTPRJ may function as a tumor suppressor and play an important role in the regulation of ESCC cell motility, suggesting its potentials as a therapeutic agent for human ESCC.

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Authors and Affiliations

  1. Department of Radiotherapy Pathology, People’s Hospital of Lianshui County, Lianshui, 223400, China

    Dongfeng Qiao, Juan Pu & Wanwei Wang

  2. Department of Radiotherapy Pathology, People’s Hospital of Xuyi County, Xuyi, 211700, China

    Ming Li

  3. Department of Radiotherapy Oncology, Huai’an First People’s Hospital, Nanjing Medical University, Huai’an, 223300, China

    Weiguo Zhu

  4. Department of Pathology, Huai’an First People’s Hospital, Nanjing Medical University, Huai’an, 223300, China

    Haiyan Liu

Authors
  1. Dongfeng Qiao
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  2. Ming Li
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  3. Juan Pu
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  4. Wanwei Wang
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  5. Weiguo Zhu
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Correspondence to Weiguo Zhu or Haiyan Liu.

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Dongfeng Qiao and Ming Li contributed equally in this study.

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Qiao, D., Li, M., Pu, J. et al. Loss of Protein Tyrosine Phosphatase Receptor J Expression Predicts an Aggressive Clinical Course in Patients with Esophageal Squamous Cell Carcinoma. Pathol. Oncol. Res. 22, 541–547 (2016). https://doi.org/10.1007/s12253-015-0036-3

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  • DOI: https://doi.org/10.1007/s12253-015-0036-3

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