Provided are a novel means for regulating inflammatory reactions by regulating the signaling in inflammatory responses caused by non-homeostatic cell death, specifically an anti-inflammatory agent comprising a substance that inhibits the expression of Mincle or the interaction of Mincle and SAP130 or FcRγ, a screening method for a substance that regulates inflammatory reactions, comprising contacting Mincle or a fragment containing an extracellular region thereof and SAP130 in the presence and absence of a test substance, and comparing the degrees of the interaction of Mincle or the fragment thereof and SAP130 under the two conditions, a method of detecting non-homeostatic cell death, comprising measuring the amount of SAP130 in a sample collected from a subject animal, and the like.