Salivary PYY: a putative bypass to satiety.
Peptide YY(3-36) is a satiation hormone released postprandially into the bloodstream from L-endocrine cells in the gut epithelia. In the current report, we demonstrate PYY(3-36) is also present in murine as well as in human saliva. In mice, salivary PYY(3-36) derives from plasma and is also synthesized in the taste cells in taste buds of the tongue. Moreover, the cognate receptor Y2R is abundantly expressed in the basal layer of the progenitor cells of the tongue epithelia and von Ebner's gland. The acute augmentation of salivary PYY(3-36) induced stronger satiation as demonstrated in feeding behavioral studies. The effect is mediated through the activation of the specific Y2 receptor expressed in the lingual epithelial cells. In a long-term study involving diet-induced obese (DIO) mice, a sustained increase in PYY(3-36) was achieved using viral vector-mediated gene delivery targeting salivary glands. The chronic increase in salivary PYY(3-36) resulted in a significant long-term reduction in food intake (FI) and body weight (BW). Thus this study provides evidence for new functions of the previously characterized gut peptide PYY(3-36) suggesting a potential simple and efficient alternative therapeutic approach for the treatment of obesity.
Pediatrics, University of Florida, Gainesville, Florida, United States of America.
Andres
A
Acosta
Maria D
MD
Hurtado
Oleg
O
Gorbatyuk
Michael
M
La Sala
David
D
Duncan
George
G
Aslanidi
Martha
M
Campbell-Thompson
Lei
L
Zhang
Herbert
H
Herzog
Antonis
A
Voutetakis
Bruce J
BJ
Baum
Sergei
S
Zolotukhin
D000284:Administration, Oral; D000293:Adolescent; D000328:Adult; D000818:Animals; D001835:Body Weight / Q000187:drug effects; D004435:Eating / Q000187:drug effects / Q000523:psychology; D004847:Epithelial Cells / Q000187:drug effects / Q000378:metabolism; D005247:Feeding Behavior / Q000187:drug effects / Q000523:psychology; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D051379:Mice; D010446:Peptide Fragments; D019894:Peptide YY / Q000008:administration & dosage / Q000097:blood / Q000378:metabolism* / Q000494:pharmacology; D012463:Saliva / Q000187:drug effects / Q000378:metabolism*; D012528:Satiety Response / Q000187:drug effects; D013997:Time Factors; D014059:Tongue / Q000166:cytology; D055815:Young Adult
D010446:Peptide Fragments; D019894:Peptide YY; C061785:peptide YY (3-36)