Cloning and characterisation of the rabbit 5-HT1Dα and 5-HT1Dβ receptors

Abstract

AbstractThe genes encoding the rabbit 5HT1Dα and 5HT1Dβ receptors have been cloned. The deduced amino acid sequence of these receptors shows 91–92% amino acid sequence identity with their human homologues, and similar high sequence identity with homologues from other species. The receptors were transiently expressed in COS-7 cells and exhibit a pharmacological profile closely resembling their human homologues, including a higher affinity of ketanserin for the 5-HT1Dα subtype. However, sumatriptan had a lower affinity for both the rabbit receptors compared to their human counterparts. This may be accounted for by differences between the primary amino acid sequences of these species homologues