Abstract
Glioma is one of the most fatal types of malignant tumours, the cause of which is mostly unknown. Orphan GPCRs (GPRs) have been previously implicated in tumour growth and metastasis. Therefore, these GPRs could prove to be alternative and promising therapeutic targets for cancer treatment. The role of GPR160 in glioma has not yet been assessed. This study aims to explore the association of GPR160 with glioma progression and investigate its role in epithelial-to-mesenchymal transition (EMT) and metastasis. Changes in protein expression were assessed using western blot analysis and immunofluorescent staining assays, while mRNA expression changes were evaluated using qRT-PCR. To detect the changes in progression and metastasis, MTT, EdU proliferation, wound healing, transwell migration, and flow cytometry assays were carried out in vitro. An epithelial to mesenchymal phenotypic analysis was performed to detect EMT. We demonstrated that knockdown of GPR160 inhibited proliferation, colony formation, and cell viability and promoted apoptosis. Pro-apoptotic biomarkers were upregulated, while anti-apoptotic biomarkers were downregulated. Cell lines with GPR160 knockdown (GPR160 KD) showed a slowed migration rate and decreased invasion ability. EMT mesenchymal biomarkers were downregulated in GPR160 KD cell lines, while epithelial biomarkers were upregulated. This study provides evidence that GPR160 is a potential therapeutic target in glioma for the first time. These findings can be used to discover in detail the molecular mechanism and pathways through which GPR160 promotes glioma progression.
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