A single nucleotide polymorphism in the 3'-untranslated region of the KRAS gene disrupts the interaction with let-7a and enhances the metastatic potential of osteosarcoma cells

  • Authors:
    • Shiqian Zhang
    • Chunying Hou
    • Guojun Li
    • Yang Zhong
    • Jie Zhang
    • Xinzhen Guo
    • Baoxin Li
    • Zhenggang Bi
    • Ming Shao
  • View Affiliations

  • Published online on: July 4, 2016     https://doi.org/10.3892/ijmm.2016.2661
  • Pages: 919-926
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Abstract

The objective of the present study was to explore the molecular mechanism with which a single nucleotide polymorphism (rs61764370) interferes with the interaction between the 3'-untranslated region (3'-UTR) of Kirsten rat sarcoma viral oncogene homolog (KRAS) and let-7a, and its association with the metastasis of osteosarcoma (OS). In this study, we confirmed that KRAS is a target of let-7a in OS cells, and the introduction of rs61764370 minor allele into KRAS 3'-UTR significantly compromised the microRNA (miRNA)/mRNA interaction using a luciferase reporter system. Additionally, a total of 36 OS tissue samples of three different genotypes (TT,22; TG,10; GG,4) were obtained, and the expression of let-7a and KRAS was determined. We showed that let-7a mRNA expression was similar between each group whereas the mRNA and protein expression of KRAS in the TT genotype group was significantly lower than that in the GT or GG genotype groups. Moreover, we identified a negative regulatory relationship between let-7a and KRAS. Furthermore, we demonstrated that let-7a and KRAS interfered with the viability, invasiveness and migration of OS cells genotyped as TT. In the OS cells genotyped as TG, let-7a exerted minimal effects, and the effect of KRAS siRNA remained. Taken together, the findings of the present study demonstrated that the KRAS 3'-UTR rs61764370 polymorphism interfered with miRNA/mRNA interaction, and showed that the minor allele was associated with an elevated risk of developing metastatic disease in OS.
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September-2016
Volume 38 Issue 3

Print ISSN: 1107-3756
Online ISSN:1791-244X

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Spandidos Publications style
Zhang S, Hou C, Li G, Zhong Y, Zhang J, Guo X, Li B, Bi Z and Shao M: A single nucleotide polymorphism in the 3'-untranslated region of the KRAS gene disrupts the interaction with let-7a and enhances the metastatic potential of osteosarcoma cells. Int J Mol Med 38: 919-926, 2016.
APA
Zhang, S., Hou, C., Li, G., Zhong, Y., Zhang, J., Guo, X. ... Shao, M. (2016). A single nucleotide polymorphism in the 3'-untranslated region of the KRAS gene disrupts the interaction with let-7a and enhances the metastatic potential of osteosarcoma cells. International Journal of Molecular Medicine, 38, 919-926. https://doi.org/10.3892/ijmm.2016.2661
MLA
Zhang, S., Hou, C., Li, G., Zhong, Y., Zhang, J., Guo, X., Li, B., Bi, Z., Shao, M."A single nucleotide polymorphism in the 3'-untranslated region of the KRAS gene disrupts the interaction with let-7a and enhances the metastatic potential of osteosarcoma cells". International Journal of Molecular Medicine 38.3 (2016): 919-926.
Chicago
Zhang, S., Hou, C., Li, G., Zhong, Y., Zhang, J., Guo, X., Li, B., Bi, Z., Shao, M."A single nucleotide polymorphism in the 3'-untranslated region of the KRAS gene disrupts the interaction with let-7a and enhances the metastatic potential of osteosarcoma cells". International Journal of Molecular Medicine 38, no. 3 (2016): 919-926. https://doi.org/10.3892/ijmm.2016.2661