In contrast to these virally-induced infectious diseases, our search of NCBI GEO revealed that TAAR1 RNA is detectable in PBMCs of patients with the inflammatory or immunological diseases osteoarthritis (Ramos et al., 2014, GDS5363), juvenile idiopathic arthritis (Hinze et al., 2010, GDS4267; Moncrieffe et al., 2010, GDS4272), and multiple sclerosis (Malhotra et al., 2011, GDS4147). Here, TAAR1 is linked to osteoarthritis.