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Fig. 3 | Cellular & Molecular Biology Letters

Fig. 3

From: HIF-1α/JMJD1A signaling regulates inflammation and oxidative stress following hyperglycemia and hypoxia-induced vascular cell injury

Fig. 3

Effects of inhibition of HIF-1α on expression of inflammation after hyperglycemic and hypoxia. a Cells were treated with glucose (25 mM) or with combined exposure to high glucose and hypoxia for 6, 12, 24, and 48 h. Exposure to glucose alone or combined stimulation with hypoxia significantly increased gene expression of HIF-1α. b Cells were treated with KC7F2 (10 µM) or si-HIF-1α for 48 h following combined stimulation, and IL-6, IL-8, ICAM-1, MCP-1, and c HIF-1α levels were analyzed. The relative density of IL-6, IL-8, ICAM-1, and MCP-1 (d) was normalized according to GAPDH expression. Importantly, the downregulation of HIF-1α decreased the secretion of IL-6, IL-8, ICAM-1 and MCP-1 based on ELISA and qRT-PCR assays (ef). n = 3; *p < 0.05 and **p < 0.01 vs. DMSO. DMSO-treated cells, DMSO; HIF-1α inhibitors KC7F2 (10 µM)-treated cells, KC7F2 (10 µM); si-HIF-1α, small interfering RNA HIF-1α; HG, high glucose; HG + Hypoxia, combined stimulus with high glucose and hypoxia; NG, control

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