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RNA binding protein Nova1 promotes tumor growth in vivo and its potential mechanism as an oncogene may due to its interaction with GABAA Receptor-γ2.
- Source :
- Journal of Biomedical Science; 10/12/2016, Vol. 23, p1-9, 9p, 1 Diagram, 4 Charts, 2 Graphs
- Publication Year :
- 2016
-
Abstract
- Background: The mechanism of Nova1's role in hepatocellular carcinoma has not been delineated. Also its interaction with GABA<subscript>A</subscript> receptor γ2 in HCC is unveiled. This study is aimed to make it clear the distribution, prognostic value of GABA<subscript>A</subscript>Rγ2 in human hepatocellular carcinoma. And its role in HCC tumorigenesis under the regulation of its alternative splicing factor Nova1. Methods: Immunohistochemistry staining was used to investigate the distribution and clinical significance of GABA<subscript>A</subscript>Rγ2 protein expression in hepatocellular carcinoma. In vivo tumorigenticity test was conducted in nude mice by regulation the expression of Nova1. Later, western blot and co-immunoprecipitation were carried out to verify the interaction between Nova1 and GABA<subscript>A</subscript>Rγ2 in HCC tissue. Results: Immunohistochemical staining showed GABAARγ2 expression in HCC. Survival analysis showed intratumoral GABA<subscript>A</subscript>Rγ2 was an independent prognostic factor for overall survival (OS) and disease free survival (DFS). Up-regulation of Nova1 expression promotes subcutaneous HCC growth in nude mice and western blot showed the ectopic expression of Nova-1 restro-regulates the expression of GABA<subscript>A</subscript>Rγ2 and GABA. Protein level interaction of GABA<subscript>A</subscript>Rγ2 and Nova-1 was evidenced by co-immunoprecipitation. Conclusions: Nova1 interacts with GABA<subscript>A</subscript>Rγ2 not only in CNS but also in HCC. Nova1's potential mechanism as an oncogene may due to its interaction with GABA<subscript>A</subscript> Rγ2. A better understanding of the mechanism of Nova1 for HCC progression provides a novel target for an optimal immunotherapy against this fatal malignancy. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10217770
- Volume :
- 23
- Database :
- Complementary Index
- Journal :
- Journal of Biomedical Science
- Publication Type :
- Academic Journal
- Accession number :
- 119005878
- Full Text :
- https://doi.org/10.1186/s12929-016-0288-6