IVL and psoriasis: The group of genes encoding serpins, as well as involucrin have been shown to play a role in keratinocyte differentiation (Henry, 2012; Toulza et al., 2007) and have been associated with psoriasis (Roberson and Bowcock, 2010; Suárez-Fariñas et al., 2012; Wolf et al., 2012), belonging to the ‘psoriasis transcriptome’ identified by Tian et al., 2012.