More recently, also GPR55, TPVR1, PPARα and ankyrin 1 (TRPA1), besides CB1 and CB2 receptors, were found in keratinocytes of healthy and atopic dogs, and an overexpression of CB2 receptor and TPRA1 was observed in those with atopic dermatitis (Chiocchetti et al. 2022a). This evidence concerns the gene CNR1 and atopic eczema.