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- W4298148988 abstract "Progranulin (PGRN) is an important survival factor in the progression of multiple cancers.To explore the effects and mechanisms of PGRN on malignant biological behavior of osteosarcoma (OS) cells and the effects of mesenchymal stem cells (MSCs) and the hypoxic microenvironment on PGRN alteration.The expression pattern of PGRN in OS were evaluated in OS tissues and cell lines. Next, a loss-of-function assay investigated the function of PGRN on the proliferation, migration and cell death of OS cells. The activation of MAPK signaling in the process was examined by western blot and functional experiments accompanied by skatole. Additionally, we internally silenced hypoxia-inducible factor-1α (HIF-1α) in MSCs along with exogenously added HIF-1α (exo-HIF-1α) to explore how MSCs affect PGRN alteration and the malignant behavior of OS cells.An aberrantly high expression of PGRN was observed in OS and associated with the poor prognosis of OS patients. PGRN knockdown repressed the proliferation, migration and induced cell death of OS cells, and activating MAPK pathway reversed these effects. Further evidence showed that MSCs regulated PGRN to mediate the malignant biological behavior of OS cells. Hypoxia enhanced HIF-1α expression in MSCs. HIF-1α silencing in MSCs under hypoxia suppressed the oncogenic effects of MSCs and reduced PGRN expression in OS cells, while the treatment of exo-HIF-1α reversed the depressive effects of HIF1α silencing on OS progression.Overall, we concluded that PGRN, which was activated by the increase of hypoxic-MSCs-derived HIF-1α, promoted OS progression through the activation of MAPK signaling." @default.
- W4298148988 created "2022-10-01" @default.
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- W4298148988 date "2022-12-01" @default.
- W4298148988 modified "2023-09-28" @default.
- W4298148988 title "Activation of PGRN/MAPK axis stimulated by the hypoxia-conditioned mesenchymal stem cell-derived HIF-1α facilitates osteosarcoma progression" @default.
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- W4298148988 doi "https://doi.org/10.1016/j.yexcr.2022.113373" @default.
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