IL1R1 and diabetic retinopathy: Taken together, this indicates that hyperglycemia induces caspase-1 activation and IL-1β production initiating a seemingly IL-1β driven caspase-1/IL-1β/IL-1R1 feedback cycle that is detrimental to the viability of retinal cells such as Müller cells and promotes the development and progression of diabetic retinopathy (Figure 7).