Proliferative effects of gamma-amino butyric acid on oral squamous cell carcinoma cells are associated with mitogen-activated protein kinase signaling pathways

  • Authors:
    • Jing Ma
    • Yan Zhang
    • Jun Wang
    • Tianyu Zhao
    • Ping Ji
    • Jinlin Song
    • Hongmei Zhang
    • Wenping Luo
  • View Affiliations

  • Published online on: May 19, 2016     https://doi.org/10.3892/ijmm.2016.2597
  • Pages: 305-311
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Abstract

Gamma-aminobutyric acid (GABA), the major inhibitory neurotransmitter in the adult mammalian central nervous system, has been reported to play an important physiological role in peripheral non-neuronal tissues, such as tumors. However, whether deregulated GABA is associated with oral squamous cell carcinoma (OSCC) is currently unknown. In this study, we investigated the effects of GABA on the proliferation of the OSCC cell line, Tca8113. Immunohistochemical analyses were performed to examine the expression of GABA A type receptor pi subunit (GABRP) in human OSCC tissues, and reverse transcription polymerase chain reaction, immunofluorescence staining and western blot analysis were performed to examine the expression of GABRP in Tca8113 cells. The proliferative effects of GABA on Tca8113 cells were analyzed by CCK-8 assay and flow cytometry. The activation status of mitogen-activated protein kinases (MAPKs) was examined by western blot analysis. GABRP expression was observed in the cytoplasm with a higher level in poorly differentiated OSCC tissues. The mRNA and protein expression levels of GABRP were detected in the Tca8113 cells. The addition of GABA and the GABA A type receptor agonist, Muscimol, promoted cell proliferation and inhibited cell apoptosis through the activation of the p38 MAPK and the inhibition of the JNK MAPK signaling pathways. These results imply a novel role of GABA in OSCC.
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July-2016
Volume 38 Issue 1

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

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Spandidos Publications style
Ma J, Zhang Y, Wang J, Zhao T, Ji P, Song J, Zhang H and Luo W: Proliferative effects of gamma-amino butyric acid on oral squamous cell carcinoma cells are associated with mitogen-activated protein kinase signaling pathways. Int J Mol Med 38: 305-311, 2016.
APA
Ma, J., Zhang, Y., Wang, J., Zhao, T., Ji, P., Song, J. ... Luo, W. (2016). Proliferative effects of gamma-amino butyric acid on oral squamous cell carcinoma cells are associated with mitogen-activated protein kinase signaling pathways. International Journal of Molecular Medicine, 38, 305-311. https://doi.org/10.3892/ijmm.2016.2597
MLA
Ma, J., Zhang, Y., Wang, J., Zhao, T., Ji, P., Song, J., Zhang, H., Luo, W."Proliferative effects of gamma-amino butyric acid on oral squamous cell carcinoma cells are associated with mitogen-activated protein kinase signaling pathways". International Journal of Molecular Medicine 38.1 (2016): 305-311.
Chicago
Ma, J., Zhang, Y., Wang, J., Zhao, T., Ji, P., Song, J., Zhang, H., Luo, W."Proliferative effects of gamma-amino butyric acid on oral squamous cell carcinoma cells are associated with mitogen-activated protein kinase signaling pathways". International Journal of Molecular Medicine 38, no. 1 (2016): 305-311. https://doi.org/10.3892/ijmm.2016.2597