NFKB1 and type 1 diabetes mellitus: As T1DM aggravates CIRI partly via further activation of NF‐κB pathway activation and enhanced mitochondrial cytochrome C release, decreased expressions of p‐IκBα/IκBα and cytochrome C in melatonin‐treated rats when compared to vehicle‐treated rats may represent important beneficial effects of melatonin.