Neurohypophysial peptides in a bird without salt-glands

✍ Scribed by Koike, T. I.

• Book ID: 102336552
• Publisher: John Wiley and Sons
• Year: 1990
• Tongue: English
• Weight: 228 KB
• Volume: 256
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1402560438

✦ Synopsis

The neurohypophysial peptides in birds are arginine vasotocin (AVT) and mesotocin (MT). As in mammals, AVT and MT are widely distributed in the central nervous system in domestic chickens (Gallus gallus) and are found in high concentration in several peripheral tissues. AVT has oxytocic as well as antidiuretic actions in the fowl and is selectively released during oviposition or hypertonic saline infusion. The function of MT is not known. The relative potencies of AVT and MT in causing contraction of uterine muscle and displacing labeled vasopressin from myometrial binding sites are similar. AVT receptor density also is highest at oviposition, when uterine muscle is most sensitive to AVT. Peptides similar to AVT and MT are found in high