Figure 2. Antitumor immune response of AZD1775 is mediated via the cGAS-STING-TBK1-IRF3 pathway in SCLC.
(A) Quantification of cells containing micronuclei (MN) after 1 μM AZD1775 treatment for 24 h. Bars represent mean ± SD of eight areas. Statistical significance was determined using Student’s t test (***p < 0.001).
(B) Western blots showing the protein expression of STING pathway, phospho (p)- and total (t)-STING, p- and t-TBK1, p- and t-IRF3, cGAS, and actin (loading control) in SCLC cells treated with 1 μM AZD1775 for 8, 24, and 48 h.
(C) Quantitative mRNA expression of IFN-α, IFN-β after treatment with 1 μM AZD1775 for 48 h in SCLC cells (H526, H82, H446, RPP, and RPM). Bars represent mean ± SD of triplicate. Statistical significance was determined using Student’s t test (**p < 0.01, ***p < 0.001).
(D and E) Quantitative mRNA expression of (D) CXCL10 and (E) CCL5 after treatment with 1 μM AZD1775 for 48 h in SCLC cells (H526, H82, H446, RPP, and RPM). Bars represent mean ± SD of triplicate. Statistical significance was determined using Student’s t test (**p < 0.01, ***p < 0.001).
See also Figures S2–S4.