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01.12.2017 | Primary Research | Ausgabe 1/2017 Open Access

Cancer Cell International 1/2017

SNP rs3202538 in 3′UTR region of ErbB3 regulated by miR-204 and miR-211 promote gastric cancer development in Chinese population

Zeitschrift:
Cancer Cell International > Ausgabe 1/2017
Autoren:
Yaxiang Shi, Xuan Chen, Biao Xi, Xiaowen Yu, Jun Ouyang, Chunxia Han, Yucheng Qin, Defeng Wu, Hong Shen
Wichtige Hinweise

Electronic supplementary material

The online version of this article (doi:10.​1186/​s12935-017-0449-z) contains supplementary material, which is available to authorized users.

Abstract

Background/aims

ErbB3 is an oncogene which has proliferation and metastasis promotion effects by several signaling pathways. However, the individual expression difference regulated by miRNA was almost still unknown. We focused on the miRNAs associated SNPs in the 3′-UTR of ErbB3 to investigate the further relationship of the SNPs with miRNAs among Chinese gastric cancer (GC) patients.

Methods

We performed case–control study including 851 GC patients and 799 cancer-free controls. Genotyping, real-time PCR assay, cell transfection, the dual luciferase reporter assay, western-blot, cell proliferation and trans-well based cell invasion assay were used to investigate the effects of the SNP on ErbB3 expression. Moreover, a 5-years-overall survival and relapse free survival were investigated between different genotypes.

Results

We found that patients suffering from Helicobacter pylori (Hp.) infection indicated to be the susceptible population by comparing with controls. Besides, SNP rs3202538 (G/T) in ErbB3 3′-UTR was involved in the occurrence of GC by acting as tumor risk factors. SNP rs3202538 (G/T) could be regulated by both miR-204 and miR-211 which caused an upregulation of ErbB3 in patients. Furthermore, the carriers of T genotype was related to the significantly high expression of ErbB3, and to big tumor size, poor differentiation as well as the high probability of metastasis. Both miR-211 and miR-204 can significantly decrease cell proliferation, metastasis as well as downstream AKT activation through G but not T allele of ErbB3 3′UTR. Moreover, the SNP of G/T was associated with shorter survival of post-surgery GC patients with 5 years of follow up study.

Conclusion

In conclusion, our findings have shown that the SNP rs3202538 (G/T) in ErbB3 3′-UTR acted as promotion factors in the GC development through disrupting the regulatory role of miR-204 and miR-211 in ErbB3 expression.
Zusatzmaterial
Additional file 1. The output files of overal survival rate comparison in different groups analyzed by Kaplan–Meier survival curve.
Additional file 2. The output files of relapse free survival rate comparison in different groups analyzed by Kaplan–Meier survival curve.
Literatur
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