IL1B and retinitis: Here, we show an increased expression of the immature form of IL-1β (pro-IL-1β) and the mature active form (IL-1β) by Western blot analysis at 5 days after retinal IR injury in our model (Fig. 1C–E), thereby validating the IL-1β multiplex results (Fig. 1A); IL-1β was increased less at day 2 compared to day 5 as evidence of a temporally progressing event (Fig. 1B–E).