The kinin B1 receptor: an inducible G protein coupled receptor.
The B1 receptor, selectively stimulated by des-Arg9 fragments of native kinins, has a place in the vast family of G protein coupled receptors. We discuss a series of six criteria useful for comparing the B1 receptor with the more prominent and studied bradykinin B2 receptor. The B1 receptor has attracted interest because it is rapidly upregulated in biological systems following some types of tissue injury, notably the injection of bacterial materials to rabbits, rats, or pigs. A fast and specific genetic program recruits the expression of what we know now to be a G protein coupled receptor in smooth muscle cells, endothelial cells, fibroblasts, and a few other cell types. The cytokine network has been linked to B1 receptor expression in functional experiments, and this may be related to the recent finding of potential cytokine response elements in the proposed gene promoter of the human B1 receptor gene. The experimental approach of B1 receptor mRNA transcriptional regulation, protein synthesis, and maturation is illustrated, based on the biochemical (Northern blot) and functional analysis of isolated organs from rabbits injected with bacterial lipopolysaccharide or incubated in vitro with or without interleukin-1.
Marceau
F
F
Centre de recherche, Hôtel-Dieu de Québec, Canada.
Larrivée
J F
JF
Saint-Jacques
E
E
Bachvarov
D R
DR
D000818:Animals; D019204:GTP-Binding Proteins / Q000502:physiology*; D006801:Humans; D011817:Rabbits; D051381:Rats; D043783:Receptor, Bradykinin B1; D043782:Receptor, Bradykinin B2; D018002:Receptors, Bradykinin / Q000096:biosynthesis / Q000145:classification / Q000187:drug effects / Q000502:physiology*
D043783:Receptor, Bradykinin B1; D043782:Receptor, Bradykinin B2; D018002:Receptors, Bradykinin; D019204:GTP-Binding Proteins