Expression of natriuretic peptide receptor-A in esophageal squamous cell carcinomas and the relationship with tumor invasion and migration

World Journal of Surgical Oncology

Jiansheng Wang¹  Hui Cai¹  Jia Zhang¹  Min Li¹  Kai Sun¹  Ya Yang¹  Haoqian Liu²  Zhilong Zhao² 

[1] Department of second Thoracic surgery, First Affiliated Hospital, Xi'an Jiaotong University, Yanta West Road no. 277, Xi'an, Shaanxi 710061, China;Department of Surgical Oncology, Baoji Central hospital, Jiang Tan Road no. 8, Baoji, Shaanxi 721000, China

关键词: migration;    invasion;    MMP;    ESCC;    esophageal squamous cell carcinoma;    NPRA;    natriuretic peptide receptor-A;   

Others  :  811555
DOI  :  10.1186/1477-7819-12-154

 received in 2013-12-11, accepted in 2014-05-06,  发布年份 2014

【 摘 要 】

Background

The natriuretic peptide receptor-A (NPRA) has been investigated as a receptor of natriuretic peptides in the cardiovascular system. In this study, however, we analyze the expression status of NPRA and the relationship with tumor invasion in esophageal squamous cell carcinoma (ESCC) for the first time.

Methods

Western blots were used to examine the expression status of protein in human ESCC cell lines. Then, we used immunohistochemistry to detect the expression of NPRA in 45 ESCC specimens and 40 corresponding nontumor tissues. The clinical data were analyzed through statistical methods. Sh-RNA-NPRA was transfected into Eca109 cells to detect the relationship between NPRA and cell invasion through transwell assays.

Results

In esophageal squamous cells, the expression of NPRA was strongly detected in the cytoplasm, while undetectable or very weak in the nucleus. The positive rates of NPRA in cancer tissues are significantly higher than that in nontumor tissues (P <0.05). Clinicopathological analyses revealed that increased NPRA expression correlated with differentiation and TNM stage (P <0.05), while it showed no statistically significant association with age, gender, and lymph node metastasis. In analysis of prognosis, we found that highly.Transwell assays showed that NPRA promoted Eca109 cell migration and invasion in vitro and may be involved in MMP2 and MMP9 activation.

Conclusions

NPRA protein is highly expressed in ESCC tissues and could promote Eca109 cell migration and invasion in vitro.

【 授权许可】

   
2014 Zhao et al.; licensee BioMed Central Ltd.

【 图 表 】

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