The role of SLC7A5 in T cell differentiation towards Th1, Th2, and Th17 has been previously described in vitro and in vivo in mouse models of viral infection (Hayashi et al, 2013; Sinclair et al, 2013), psoriasis (Cibrian et al, 2020), allergic diseases (Hayashi et al, 2020), and rheumatoid arthritis (Ogbechi et al, 2023). The gene discussed is SLC7A5; the disease is psoriasis.