Salivary PYY: a putative bypass to satiety.

Salivary PYY: a putative bypass to satiety.
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DOI:
10.1371/journal.pone.0026137
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发表时间:
2011
期刊:
影响因子:
3.7
通讯作者:
Zolotukhin S
Zolotukhin S
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Acosta A;Hurtado MD;Gorbatyuk O;La Sala M;Duncan D;Aslanidi G;Campbell-Thompson M;Zhang L;Herzog H;Voutetakis A;Baum BJ;Zolotukhin S

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肽YY3-36是一种餐后从肠上皮l -内分泌细胞释放到血液中的饱腹激素。在目前的报告中,我们证明PYY3-36也存在于小鼠和人类唾液中。在老鼠的唾液中,PYY3-36来源于血浆,也在舌头味蕾的味觉细胞中合成。此外,同源受体Y2R在舌上皮和冯氏腺的祖细胞基底层大量表达。喂养行为研究表明,唾液PYY3-36的急性增加会引起更强的饱足感。这种作用是通过激活舌上皮细胞中表达的特异性Y2受体介导的。在一项涉及饮食诱导肥胖(DIO)小鼠的长期研究中,利用针对唾液腺的病毒载体介导的基因传递实现了PYY3-36的持续增加。唾液PYY3-36的慢性增加导致食物摄入量(FI)和体重(BW)的长期显著减少。因此,这项研究为先前表征的肠道肽PYY3-36的新功能提供了证据,提示了治疗肥胖的潜在简单有效的替代治疗方法。
Peptide YY3-36 is a satiation hormone released postprandially into the bloodstream from L-endocrine cells in the gut epithelia. In the current report, we demonstrate PYY3-36 is also present in murine as well as in human saliva. In mice, salivary PYY3-36 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 PYY3-36 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 PYY3-36 was achieved using viral vector-mediated gene delivery targeting salivary glands. The chronic increase in salivary PYY3-36 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 PYY3-36 suggesting a potential simple and efficient alternative therapeutic approach for the treatment of obesity.
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