17 January 2018 : Laboratory Research
To Explore the Mechanism of the GRM4 Gene in Osteosarcoma by RNA Sequencing and Bioinformatics ApproachYunguo Pang12ABE, Jinmin Zhao23CD, Mitra Fowdur12EF, Yun Liu1DF, Hao Wu1BF, Maolin He12ADFG*
Med Sci Monit Basic Res 2018; 24:16-25
BACKGROUND: Glutamate metabotropic receptor 4 (GRM4) has been correlated with the pathogenesis of osteosarcoma. The objective of this study was to explore the underlying molecular mechanism of GRM4 in osteosarcoma.
MATERIAL AND METHODS: The expression levels of GRM4 in four human osteosarcoma cell lines and hFOB1.19 cells were examined by real-time quantitative PCR (RT-qPCR). The U2OS cells of the highest GRM4 expression were transfected with lentivirus-mediated small interfering RNA (siRNA). The differentially expressed genes (DEGs) after GRM4 gene silencing were screened through RNA sequencing, and analyzed by bioinformatics. Additionally, the transcription factors (TFs) targeting GRM4 were predicted and the downstream protein-protein interaction (PPI) network was constructed using the bioinformatics approach.
RESULTS: A total of 51 significant DEGs were obtained, including 14 upregulated and 37 downregulated DEGs. The Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analysis of the DEGs indicated that four significant enrichment pathways were obtained. A total of six TFs that could be involved in the transcriptional regulation of GRM4 were detected. The results showed that 182 genes in the PPI network were significantly enriched in 14 pathways. The chemokines and chemokine receptors were found to be significantly enriched in three pathways.
CONCLUSIONS: The DEGs in the four significant enrichment pathways might participate in the development and progression of osteosarcoma through GRM4. The results revealed that EGR1 and CTCF are probably involved in the transcriptional regulation of GRM4, which participates in the progress of osteosarcoma by interacting with chemokines and their receptors.
Keywords: Lentivirus Infections, Receptors, Metabotropic Glutamate, Sequence Analysis, RNA
Most Viewed Current Articles
05 Jan 2021 : Review articleA Southeast Asian Perspective on the COVID-19 Pandemic: Hemoglobin E (HbE)-Trait Confers Resistance Against...
Med Sci Monit Basic Res 2021; 27:e929207
07 Jul 2022 : Laboratory ResearchCytotoxicity, Apoptosis, Migration Inhibition, and Autophagy-Induced by Crude Ricin from Ricinus communis S...
Med Sci Monit Basic Res 2022; 28:e936683
05 May 2022 : Laboratory ResearchCalcitriol Inhibits Proliferation and Potentially Induces Apoptosis in B16-F10 Cells
Med Sci Monit Basic Res 2022; 28:e935139
09 Jun 2021 : Laboratory ResearchVitamin D Inhibits Lipopolysaccharide (LPS)-Induced Inflammation in A549 Cells by Downregulating Inflammato...
Med Sci Monit Basic Res 2021; 27:e931481