Increased leptin may be involved in the short life span of ayu (Plecoglossus altivelis)
Identifieur interne : 000855 ( Main/Exploration ); précédent : 000854; suivant : 000856Increased leptin may be involved in the short life span of ayu (Plecoglossus altivelis)
Auteurs : Reiko Nagasaka [Japon] ; Nobuaki Okamoto [Japon] ; Hideki Ushio [Japon]Source :
- Journal of Experimental Zoology Part A: Comparative Experimental Biology [ 1548-8969 ] ; 2006-06-01.
Abstract
It is well known that ayu (Plecoglossus altivelis) die after spawning and have a life span of only 1 year. The determinants for such a short life span are probably connected with spawning and related changes in hormonal homeostases. One of these changes is that the ayu's feeding activity decreases both during and after spawning. We investigated the relationships among leptin, one of the regulators of food intake, and two other major hormones, 17 β‐estradiol and prolactin (PRL). Ir‐leptin levels were significantly higher during spawning, and were associated with a decrease in appetite. Ir‐leptin levels were also synchronized with levels of 17 β‐estradiol and PRL‐like protein. Therefore, one possible explanation for the decrease in appetite during ayu spawning is that the elevation of 17 β‐estradiol homeostasis induced the secretion of Ir‐leptin. The inability to decrease leptin to the basal levels because of high estrogen after spawning could be in part responsible for the short life span of ayu. J. Exp. Zool. 305A, 2006. © 2006 Wiley‐Liss, Inc.
Url:
DOI: 10.1002/jez.a.279
Affiliations:
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Exp. Zool.</title><idno type="ISSN">1548-8969</idno><idno type="eISSN">1552-499X</idno><imprint><publisher>Wiley Subscription Services, Inc., A Wiley Company</publisher><pubPlace>Hoboken</pubPlace><date type="published" when="2006-06-01">2006-06-01</date><biblScope unit="volume">305A</biblScope><biblScope unit="issue">6</biblScope><biblScope unit="page" from="507">507</biblScope><biblScope unit="page" to="512">512</biblScope></imprint><idno type="ISSN">1548-8969</idno></series><idno type="istex">49A2F36BD83B73D05DE83EA46723A54DBD7543A4</idno><idno type="DOI">10.1002/jez.a.279</idno><idno type="ArticleID">JEZ279</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1548-8969</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">It is well known that ayu (Plecoglossus altivelis) die after spawning and have a life span of only 1 year. The determinants for such a short life span are probably connected with spawning and related changes in hormonal homeostases. One of these changes is that the ayu's feeding activity decreases both during and after spawning. We investigated the relationships among leptin, one of the regulators of food intake, and two other major hormones, 17 β‐estradiol and prolactin (PRL). Ir‐leptin levels were significantly higher during spawning, and were associated with a decrease in appetite. Ir‐leptin levels were also synchronized with levels of 17 β‐estradiol and PRL‐like protein. Therefore, one possible explanation for the decrease in appetite during ayu spawning is that the elevation of 17 β‐estradiol homeostasis induced the secretion of Ir‐leptin. The inability to decrease leptin to the basal levels because of high estrogen after spawning could be in part responsible for the short life span of ayu. J. Exp. Zool. 305A, 2006. © 2006 Wiley‐Liss, Inc.</div></front></TEI><affiliations><list><country><li>Japon</li></country><region><li>Région de Kantō</li></region><settlement><li>Tokyo</li></settlement></list><tree><country name="Japon"><region name="Région de Kantō"><name sortKey="Nagasaka, Reiko" sort="Nagasaka, Reiko" uniqKey="Nagasaka R" first="Reiko" last="Nagasaka">Reiko Nagasaka</name></region><name sortKey="Okamoto, Nobuaki" sort="Okamoto, Nobuaki" uniqKey="Okamoto N" first="Nobuaki" last="Okamoto">Nobuaki Okamoto</name><name sortKey="Ushio, Hideki" sort="Ushio, Hideki" uniqKey="Ushio H" first="Hideki" last="Ushio">Hideki Ushio</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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