Extended Data Fig. 3: Phosphorylation of IRF3 after treatment with PI3K isoform inhibitors or knock down of PI3K isoform subunits under STING agonist treatment.

(a) Phosphorylation of IRF3 at B cells from KPC transgenic mice after treatments with MSA-2 (5 µM) or combination of MSA-2 (5 µM) with IPI-549 (20 nM – 500 nM). (b) Phosphorylation of IRF3 at Human CD4+ T cells, Human CD8+ T cells and Human NK cells after treatments with MSA-2 (5 µg/mL) or combination of MSA-2 (10 µg/mL) with IPI-549 (10 μM) or SH-273 (10 μM). (c, d) Phosphorylation of IRF3 at B cells from KPC transgenic mice after treatments with MSA-2 (5 µM) or combination of MSA-2 (5 µM) with SH-344 (100 nM – 500 nM, c), or combination of MSA-2 (5 µM) with TGR-1202 (50 nM – 500 nM, d). (e, f) Western blot of B cells from KPC transgenic mice after knocking down of p110γ (e), p101 (e) or p110δ (f) by shRNA. The data represents two independent experiments (a-f).