VIP and PACAP
β Scribed by Goetzl E.J., Voice J.K., Dorsam G.
- Book ID
- 127398868
- Year
- 2000
- Tongue
- English
- Weight
- 133 KB
- Category
- Library
No coin nor oath required. For personal study only.
β¦ Synopsis
Vasoactive intestinal peptide (VIP) and pituitary adenylyi cyclase-activating peptide (PACAP) are homologous mediators that are released from cholinergic, nonadrenergic noncholinergic, and other neurons. They are recognized by members of a subfamily of G protein-coupled receptors. VIP and PACAP are distributed widely, but with anatomical peaks, in the nervous and endocrine systems, lungs, intestines, and immune organs. Their early appearance in embryo-genesis and the deleterious effects of pharmacological antagonism in utero both suggest that VIP and PACAP are critical mediators of development. In adult mammals, VIP and PACAP normally have potent neural, endocrine, other physiological, and immune effects and potential pathological roles in esophageal achalasia, Hirschsprung's disease of the colon, cystic fibrosis, diabetes, and asthma.
π SIMILAR VOLUMES
This subfamily of G protein-coupled receptors consists of PACi, which binds PACAP alone, and VPAC, and VPAC2, which bind PACAP and VIP with equal affinity. These homologous receptors all have a long N-terminal extracellular sequence with five conserved cysteines, as well as conserved other cysteines