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Transmembrane Protein 166 Expression in Esophageal Squamous Cell Carcinoma in Xinjiang, China

  • Sun, Wei (Department of Thoracic Oncology, the Affiliated Tumor Hospital of Xinjiang Medical University) ;
  • Ma, Xiu-Min (State Key Laboratory Incubation Base of Xinjiang Major Diseases Research, the First Affiliated Hospital of Xinjiang Medical University) ;
  • Bai, Jing-Ping (Department of Thoracic Oncology, the Affiliated Tumor Hospital of Xinjiang Medical University) ;
  • Zhang, Guo-Qing (Department of Thoracic Oncology, the Affiliated Tumor Hospital of Xinjiang Medical University) ;
  • Zhu, Yue-Jie (National Clinical Research Base of Traditional Chinese Medicine of Xinjiang Medical University) ;
  • Ma, Hai-Mei (State Key Laboratory Incubation Base of Xinjiang Major Diseases Research, the First Affiliated Hospital of Xinjiang Medical University) ;
  • Guo, Hui (National Clinical Research Base of Traditional Chinese Medicine of Xinjiang Medical University) ;
  • Chen, Ying-Yu (Laboratory of Medical Immunology, School of Basic Medical Science, Peking University Health Science Center) ;
  • Ding, Jian-Bing (National Clinical Research Base of Traditional Chinese Medicine of Xinjiang Medical University)
  • Published : 2012.08.31

Abstract

Objective: Transmembrane protein 166 (TMEM166) expression in esophageal squamous cell carcinoma (ESCC) and remote normal esophageal tissues was examined to assess any role in tumour biology. Methods: TMEM166 mRNA expression in 36 cases with ESCC (36 tumour samples, 36 remote normal esophageal tissue samples) was detected by RT-PCR. TMEM166 protein expression was analysed in paraffin-embedded tissue samples from the same cases by immunohistochemistry. Results: Semi-quantitative analysis showed TMEM166 mRNA expression in ESCCs to be significantly lower than in remote normal esophageal tissues ($0.759{\pm}0.713$ vs. $2.622{\pm}1.690$, P=0.014). TMEM166 protein expression was also significantly reduced (69.4% vs. 94.4%, P<0.01). Conclusion: TMEM166 mRNA and protein expression demonstrated significant reduction in ESCCs compared with remote esophageal tissues, albeit with no correlation with tumour size, differentiation, stage, and lymph node metastasis, suggesting a role in regulating autophagic and apoptotic processes in the ESCC.

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