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. 2023 Sep 5;14:5415. doi: 10.1038/s41467-023-41218-5

Fig. 3. Indoleamine 2,3-dioxygenase 1 (IDO1)-mediated Trp decreased STING level and IFN-I production.

Fig. 3

A ELISA for IFN-β content in the supernatant after cisplatin combined indicated treatment. B mRNA expression of Trp catabolic enzymes after treated with cisplatin. C HPLC-MS detection of Kyn levels after treated with cisplatin or RT under indicated medium. D Immunoassay for STING expression after treated with Kyn under indicated medium. E Immunoassay for representative cGAS-STING related genes expression after treated with Kyn under indicated medium. F Immunoassay for representative cGAS-STING related genes expression after treated with cGAMP or Kyn. G HPLC-MS detection of Kyn levels for knocked-out IDO1 cells after indicated treatment. H Immunoassay for IDO1, pSTING, and STING expression of IDO1 knocked-out cells after indicated treatment. I Immunoassay for IDO1 expression (left) and HPLC-MS detection of Kyn levels (right) in MB49-bearing mice after treated with cisplatin or RT (n = 6). J, K Effect of cisplatin (J), and RT (K) combined with 1-MT on MB49 growth (n = 6) (Mean ± SEM). P value by One-way ANOVA (A, IK). P value by two-tailed t test (C, G). All p value < 0.05 as statistic difference. Error bars represent Mean ± SD, unless otherwise indicated. Three biologically independent experiments were performed (AH). Source data are provided as a Source Data file.