MTOR and psoriasis: Signaling pathways, known to be implicated in psoriasis development, are the Janus kinase/signal transducer and activator of transcription (JAK/STAT), the nuclear factor kappa B (NF-κB) and the phosphatidylinositol 3-kinase/protein kinase B/mammalian target of rapamycin (PI3K/AKT/mTOR) pathway [1,5,15,16,17,18].