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. 2024 Feb 5;56(2):408–421. doi: 10.1038/s12276-024-01168-4

Fig. 6. LPS induces PKR-mediated ISR activation and CCL2/7 release through the TLR4-mtROS-dsRNA pathway.

Fig. 6

a The expression of PKR-ISR pathway-related proteins in rNPCs with or without TLR4-IN-C34 pretreatment for 1 h and LPS treatment for 6 h. b Ccl2 and Ccl7 gene expression in rNPCs with or without TLR4-IN-C34 or MitoTempo pretreatment for 1 h and LPS treatment for 6 h. c ELISA results showing CCL2 and CCL7 levels in supernatants derived from rNPCs with or without TLR4-IN-C34 or MitoTempo pretreatment for 1 h and LPS treatment for 6 h. d Fluorescence staining and FCM analysis of mtROS by MitoSOX in rNPCs pretreated with TLR4-IN-C34 or MitoTempo for 1 h and then treated with LPS for 6 h. e PKR-ISR pathway-related protein expression in rNPCs with or without MitoTempo pretreatment for 1 h and LPS treatment for 6 h. f Immunofluorescence staining of dsRNA and mitochondria in rNPCs pretreated with TLR4-IN-C34, MitoTempo or IMT1B for 1 h and then treated with LPS for 6 h. g Ccl2 and Ccl7 gene expression in rNPCs with or without IMT1B pretreatment for 1 h and LPS treatment for 6 h. h ELISA results showing CCL2 and CCL7 levels in rNPC supernatant. i The expression of PKR-ISR pathway-related proteins in rNPCs. Experiments were performed 3 times, and the data are presented as the means ± SDs. *p < 0.05; **p < 0.01; ***p < 0.001; ****p < 0.0001; ns, not significant, with ANOVA. Con, control; MT, MitoTempo; TLR4i, TLR4-IN-C34.