Title
Sulfakinins reduce food intake in the desert locust, **Schistocerca gregaria** Sulfakinins reduce food intake in the desert locust, **Schistocerca gregaria**
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Oxford ,
Subject
Biology
Human medicine
Source (journal)
Journal of insect physiology. - Oxford
Volume/pages
46(2000) :9 , p. 1259-1265
ISSN
0022-1910
ISI
000089782700003
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
In vertebrates, the peptides cholecystokinin (CCK), neuropeptide Y, galanin, and bombesin are known to be involved in the control of food intake. We report here that insect sulfakinins, peptides which display substantial sequence similarities with the vertebrate gastrin/CCK peptide family, significantly inhibit food uptake in fifth instar nymphs of the locust, Schistocerca gregaria. Upon injection of Lom-sulfakinin, a neuropeptide present in the corpus cardiacum of locusts, food intake was significantly reduced in a dose-dependent manner within a fixed 20 min time period. The induced effect ranged from 13% inhibition (10 pmol of injected peptide) to over 50% inhibition at 1 nmol. Other naturally occurring sulfakinins from different insect species also elicited this satiety effect. Analogous to the satiety effect of CCK in vertebrates, the sulfate group is required for activity. No effect on the palptip resistance was found after injection with sulfakinin. Therefore it seems unlikly that sulfakinins reduce food intake by decreasing the sensitivity of the taste receptors. (C) 2000 Elsevier Science Ltd. All rights reserved.
E-info
https://repository.uantwerpen.be/docman/iruaauth/0aef4e/1189688.pdf
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