The tachykinin receptor NK1 (TACR1) also known as neurokinin 1 receptor (NK1R) or substance P receptor (SPR) is a G protein coupled receptor. The endogenous ligand for this receptor is Substance P, although it has some affinity for other tachykinins. The protein is the product of the TACR1 gene. The NK1 receptor is present in both the central and peripheral nervous system. This receptor is an attractive drug target, particularly with regards to potential analgesics and anti-depressants. It is also a potential treatment for alcoholism and opioid addiction. In addition, it is a candidate in the etiology of bipolar disorder. Finally NK1R antagonists may also have a role as novel antiemetics and hypnotics. Green Fluorescent NK1 Tachykinin Receptor Cell Line from Innoprot allows the measurement of the activity and potency of ligands; such as Substance P.
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