Abstract:
:Neuropeptide Y (NPY) is one of the most potent stimulants of food intake in mammals, but very little is known about NPY actions in fish. The present study investigated the role of NPY in food intake in the rainbow trout (Oncorhynchus mykiss). Food intake was monitored at different times after intracerebroventricular administration of porcine NPY (4 or 8 microg). Both doses significantly increased food intake at 2 and 3 h, and this effect was dose-dependent. However, 50 h after administration of NPY, food intake was significantly lower than in control fish, and cumulative food intake had returned to levels similar to those seen in the control group. The NPY antagonist (D-Tyr27,36, D-Thr32)-NPY (10 microg) inhibited food intake 2 h after icv administration, but did not block the orexigenic effect of NPY when administered jointly with 4 microg NPY. To identify the NPY receptor subtypes involved in the effects of NPY on food intake, we studied the effects of the Y1 receptor agonist (Leu31, Pro34)-NPY (4 microg), the Y2 receptor agonist NPY(3-36) (4 microg), and the highly specific Y5 receptor agonist (cPP(1-7), NPY19-23, Ala31, Aib32, Gln34)-hPP (4 microg). Short-term (2 h) food intake was moderately stimulated by the Y1 agonist, more strongly stimulated by the Y2 agonist, and unaffected by the Y5 agonist. We found that administration of NPY (8 microg icv) had no effect on aminergic systems in several brain regions 2 and 50 h after NPY administration. These results indicate that NPY stimulates feeding in the rainbow trout, and suggest that this effect is cooperatively mediated by Y2- and Y1-like NPY receptors, not by Y5-like receptors.
journal_name
Peptidesjournal_title
Peptidesauthors
Aldegunde M,Mancebo Mdoi
10.1016/j.peptides.2005.09.014subject
Has Abstractpub_date
2006-04-01 00:00:00pages
719-27issue
4eissn
0196-9781issn
1873-5169pii
S0196-9781(05)00462-6journal_volume
27pub_type
杂志文章相关文献
PEPTIDES文献大全abstract::Although previous studies have implicated NPY in the etiology of experimental cancer anorexia, the results have been difficult to interpret. Studies have suggested that although NPY level and message were decreased in the dorsomedial hypothalamic area (DMA), they were elevated in the ventromedial hypothalamic area (VM...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/j.peptides.2006.10.018
更新日期:2007-02-01 00:00:00
abstract::The influence of central vs. peripheral administration of specific type A and type B CCK receptor antagonists (L364,718 and L365,260, respectively) on colonic motor hyperactivity induced by feeding and CCK8 was investigated in dogs with strain-gauge transducers implanted on the proximal and transverse colon. Intraveno...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(91)90095-7
更新日期:1991-05-01 00:00:00
abstract::The peptide IIAEK derived from beta-lactoglobulin has a hypocholesterolemic activity greater than that of beta-sitosterol. To create food proteins with multiple copies of this valuable peptide sequence, we introduced tandem multimers of the nucleotide sequence encoding the peptide into DNA regions corresponding to the...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/j.peptides.2005.11.007
更新日期:2006-06-01 00:00:00
abstract::Rhoptries are specialized secretory organelles found in all members of the genus Plasmodium whose proteins have been considered as promising vaccine candidates due to their involvement in cell invasion and the formation of the parasitophorous vacuole (PV). The Plasmodium falciparum Pf34 protein was recently identified...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/j.peptides.2010.07.009
更新日期:2010-11-01 00:00:00
abstract::We previously demonstrated that intracerebroventricular (i.c.v.) administration of the substance P (SP) aminoterminal fragment SP(1-7) attenuates the expression of morphine withdrawal in the male rat. In this study we have used a synthetic analogue of this peptide, i.e. the SP(1-7) amide showing higher binding potency...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/j.peptides.2009.08.009
更新日期:2009-12-01 00:00:00
abstract::The degradation of synthetic Manduca sexta allatostatin (Manse-AS) and allatotropin (Manse-AT), by enzymes of the foregut of larvae of the tomato moth, Lacanobia oleracea was investigated using reversed-phase high performance liquid chromatography (RP-HPLC) together with matrix-assisted laser desorption ionization-tim...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/s0196-9781(02)00189-4
更新日期:2002-11-01 00:00:00
abstract::Baboons received a 5-minute intravenous infusion of either saline or bombesin (BBS; 1-4 micrograms/kg) following 3 1/2 or 16 1/2 hours of food deprivation and were then allowed to eat for 30 minutes. Plasma insulin was significantly elevated following five minutes of BBS infusion, but there was no change of plasma glu...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(83)90019-0
更新日期:1983-09-01 00:00:00
abstract::One novel Kunitz BPTI-like peptide designated as BBPTI-1, with chymotrypsin inhibitory activity was identified from the venom of Burmese Daboia russelii siamensis. It was purified by three steps of chromatography including gel filtration, cation exchange and reversed phase. A partial N-terminal sequence of BBPTI-1, HD...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/j.peptides.2013.02.009
更新日期:2013-05-01 00:00:00
abstract::Melanin-concentrating hormone (MCH) has attracted considerable attention because of its effects on food intake and body weight and the MCH receptor (MCHR1) remains one of the viable targets for obesity therapy. This review summarizes the literature examining the effects of MCH on body weight, food intake and energy ex...
journal_title:Peptides
pub_type: 杂志文章,评审
doi:10.1016/j.peptides.2009.05.002
更新日期:2009-11-01 00:00:00
abstract::Due to recent emergence of fungal pathogens resistant to current antifungal therapies, several studies have been focused on screening of plant peptides to find novel compounds having antifungal activities. Here, a novel antifungal plant peptide, with molecular mass of 1230 Da was purified from fruits of Trapa natans b...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/j.peptides.2011.06.020
更新日期:2011-08-01 00:00:00
abstract::An antiserum directed against the COOH-terminal region of neuropeptide K-(1-24)-peptide that shows only 0.5% reactivity with neuropeptide K has been used in radioimmunoassay to study the posttranslation processing of human beta-preprotachykinin. A primary midgut carcinoid tumor contained high concentration of substanc...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(88)90134-9
更新日期:1988-07-01 00:00:00
abstract::D-Amino acid substitutions in the anti-inflammatory/antipyretic Ac-alpha-MSH(11-13)-NH2 tripeptide of Ac-alpha-MSH(1-13)-NH2 were made and the altered peptides were injected in mice treated with picryl chloride. Ear swelling, measured 3 and 6 h after application of the irritant, was reduced by IP injections of Ac-alph...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(91)90131-8
更新日期:1991-07-01 00:00:00
abstract::A new CCK8 related peptide, Boc[Nle28,Nle31]CCK27-33 (Boc[diNle]CCK7) was synthesized and tested for cholecystokinic activity, at both the peripheral and the central level. This analogue, protected against both chemical oxidation and enzymatic degradation by aminopeptidases, was shown to be equipotent to CCK8 in relea...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(85)90106-8
更新日期:1985-05-01 00:00:00
abstract::High levels of neuropeptide Y (NPY) are found in the hypothalamus, median eminence, pituitary portal blood, and the pituitary in a number of species. Neuropeptide Y may influence the synthesis and secretion of a variety of hormones by interacting with specific receptors in the hypothalamus and/or the pituitary. To fur...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(94)90090-6
更新日期:1994-01-01 00:00:00
abstract::Antimicrobial peptides (AMPs) secreted by amphibian skin represent an important innate immune defense strategy. There are more than 340 species in the family of Ranidae worldwidely, and from which nearly 100 families of AMPs comprising between 8 and 48 amino acid (aa) residues have been characterized. In current work,...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/j.peptides.2012.01.014
更新日期:2012-02-01 00:00:00
abstract::Pituitary cells from 14-day-old rats were separated by unit gravity velocity sedimentation, and a highly enriched population of gonadotrophs was established in reaggregate cell culture in serum-free and serum albumin-free defined culture media. The medium conditioned by these aggregates was concentrated, ultrafiltrate...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(94)90217-8
更新日期:1994-01-01 00:00:00
abstract::The role of neuropeptides in cardiomyopathy-associated heart failure has been garnering more attention. Several neuropeptides--Neuropeptide Y (NPY), vasoactive intestinal peptide (VIP), calcitonin gene related peptide (CGRP), substance P (SP) and their receptors have been studied in the various types of cardiomyopathi...
journal_title:Peptides
pub_type: 杂志文章,评审
doi:10.1016/j.peptides.2014.08.004
更新日期:2014-11-01 00:00:00
abstract::We investigated the ability of sulfated cholecystokinin (26-33) (CCK-8) and cholecystokinin (30-33) (CCK-4) to induce taste aversion or avoidance conditioning (TAC) in a one-bottle testing paradigm after either intravenous (i.v.), intracerebroventricular (i.c.v.), or intraperitoneal (i.p.) administration. Significant ...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/s0196-9781(98)00025-4
更新日期:1998-01-01 00:00:00
abstract::Endomorphin 1 (EM-1) and EM-2 have been widely reported in the cells of the central nervous system (CNS) but limited research has been done regarding their distribution in the peripheral system. The occurrence of EM-1 and -2 in the spleen as measured by RIA and their ability to mediate immune function imply a role for...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/j.peptides.2003.11.016
更新日期:2004-01-01 00:00:00
abstract::Apamin is a neurotoxic octadecapeptide from bee venom, which has been shown to inhibit the non-adrenergic, non-cholinergic inhibitory innervation of the smooth muscle of the gut. Since vasoactive intestinal polypeptide (VIP) has been proposed as a possible inhibitory neurotransmitter, the effect of apamin on the recep...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(83)90102-x
更新日期:1983-03-01 00:00:00
abstract::The gastrin-releasing peptide receptor (GRPR) has been implicated in the modulation of emotionally-motivated memory. In the present study, we investigated the role of the GRPR on non-emotional, non-associative memory, and anxiety. Adult male Wistar rats were given a systemic injection of the GRPR antagonist [D-Tpi6, L...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/j.peptides.2005.06.006
更新日期:2005-12-01 00:00:00
abstract::The effects of atrial natriuretic factor (ANF) on [3H]norepinephrine ([3H]NE) release evoked by a sodium-free medium (SFM) were studied. Experiments were performed in rat adrenal medulla slices incubated in vitro. Results showed that [3H]NE release evoked by the omission of Na+ was decreased by 10 nM ANF. In addition,...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(94)90100-7
更新日期:1994-01-01 00:00:00
abstract::Binding of [125I]PACAP-38 to rat liver membranes was investigated. It was rapid at 37 degrees C, reversible, and saturable, and it was time, concentration, and temperature dependent. Scatchard plots showed that [125I]PACAP-38 bound to single noninteracting site(s), and [125I]VIP bound to high- and low-affinity binding...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(94)90206-2
更新日期:1994-01-01 00:00:00
abstract::MPF is a tetrapeptide (structure Lys-Lys-Gly-Glu) that elicits a variety of neurotrophic effects in vivo consistent with a role in neuronal regeneration. In support of this role, we now show that MPF stimulates the proliferation of cultured astrocytes and neurite outgrowth from cultures of neocortical cholinergic and ...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/s0196-9781(97)00043-0
更新日期:1997-01-01 00:00:00
abstract::Rats were injected IP with a 0.1 mg/kg dose of MIF-I, naloxone, dynorphin, [D-Phe4]-Met-enkephalin, [D-Ala2, F5Phe4]-Met-enkephalin-NH2, or the diluent vehicle, placed in their home cages for ten minutes, and then given ad lib access to either 20% sucrose, 10% sucrose, water, 0.01% quinine, or 0.02% quinine in a repea...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(80)90014-5
更新日期:1980-01-01 00:00:00
abstract::Multiple-time regression analysis has been used to study the influx of radiolabeled peptides and polypeptides across the blood-brain barrier (BBB). This study used both tritiated and iodinated leptin to clarify several issues associated with these measurements. Recombinant murine leptin was radiolabeled with 3H by der...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/s0196-9781(01)00569-1
更新日期:2001-12-01 00:00:00
abstract::Rats with dorsomedial hypothalamic lesions (DMN-L) or sham operations were injected IP with saline or the satiety peptide cholecystokinin (CCK) at 3.0 and 6.0 micrograms/kg at the onset of the dark phase. Food consumption was then measured 15, 30 and 60 min later. Compared to saline baseline intake, CCK suppressed fee...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(84)90085-8
更新日期:1984-05-01 00:00:00
abstract::Unilateral intracerebroventricular (ICV) injections of a high dose of CCK7 have been reported to elicit barrel rotations accompanied by contralateral postural asymmetry; there was no spontaneous locomotor activity other than barrel rolling. The aim of the present study was to investigate the effects of lower doses of ...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(87)90126-4
更新日期:1987-11-01 00:00:00
abstract::Methods have been developed for the microsurgical interruption of nerve pathways in the wall of the intestine and for the immunohistochemical localization of antigens in whole mounts. These methods have made it possible to determine accurately the distributions and projections of neurons containing different putative ...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/0196-9781(81)90022-x
更新日期:1981-01-01 00:00:00
abstract::The effects of proadrenomedullin N-terminal 20 peptide (PAMP) and adrenotensin (ADT) on adrenomedullin (ADM)-induced vasodilation were investigated in aortic rings from rat. ADM (10(-9) to 10(-7)M) relaxed the aorta preconstricted with phenylephrine in a concentration-dependent manner. Denudation of endothelium or pre...
journal_title:Peptides
pub_type: 杂志文章
doi:10.1016/s0196-9781(03)00109-8
更新日期:2003-04-01 00:00:00