In this regard, alterations in proteins of the differentiated and cornified layers of the skin (such as cornifelin, corneodesmosin, transglutaminase 1, alox12B, ABCA12 etc.), has been associated with various cutaneous pathologies in human, such as inflammatory diseases, i.e. psoriasis, eczema, dermatitis and ichthyosis [28–30]. This evidence concerns the gene TGM1 and psoriasis.