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Central administration of neuropeptide Y differentially regulates monoamines and corticosterone in heat-exposed fed and fasted chicks

Recently, we demonstrated that brain neuropeptide Y (NPY) mRNA expression was increased in heat exposed chicks. However, the functions of brain NPY during heat stress are unknown. This study was conducted to investigate whether centrally administered NPY affects food intake, rectal temperature, mono... Full description

Journal Title: Neuropeptides April 2017, Vol.62, pp.93-100
Main Author: Bahry, Mohammad A.
Other Authors: Chowdhury, Vishwajit S. , Yang, Hui , Tran, Phuong V. , Do, Phong H. , Han, Guofeng , Ikeda, Hiromi , Cockrem, John F. , Furuse, Mitsuhiro
Format: Electronic Article Electronic Article
Language: English
Subjects:
Npy
ID: ISSN: 0143-4179 ; DOI: 10.1016/j.npep.2016.11.008
Link: http://dx.doi.org/10.1016/j.npep.2016.11.008
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recordid: sciversesciencedirect_elsevierS0143-4179(16)30141-X
title: Central administration of neuropeptide Y differentially regulates monoamines and corticosterone in heat-exposed fed and fasted chicks
format: Article
creator:
  • Bahry, Mohammad A.
  • Chowdhury, Vishwajit S.
  • Yang, Hui
  • Tran, Phuong V.
  • Do, Phong H.
  • Han, Guofeng
  • Ikeda, Hiromi
  • Cockrem, John F.
  • Furuse, Mitsuhiro
subjects:
  • Npy
  • Rectal Temperature
  • Food Intake
  • Monoamines
  • Corticosterone
  • Chicks
ispartof: Neuropeptides, April 2017, Vol.62, pp.93-100
description: Recently, we demonstrated that brain neuropeptide Y (NPY) mRNA expression was increased in heat exposed chicks. However, the functions of brain NPY during heat stress are unknown. This study was conducted to investigate whether centrally administered NPY affects food intake, rectal temperature, monoamines, stress hormones and plasma metabolites in chicks under high ambient temperatures (HT). Five or six-day-old chicks were centrally injected with 0, 188 or 375pmol of NPY and exposed to either HT (35±1°C) or a control thermoneutral temperature (CT; 30±1°C) for 3h whilst fed or fasted. NPY increased food intake under both CT and HT. NPY reduced rectal temperature 1 and 2h after central administration under CT, but not under HT. Interestingly, NPY decreased brain serotonin and norepinephrine concentrations in fed chicks, but increased concentrations of brain dopamine and its metabolites in fasted and fed chicks, respectively. Plasma epinephrine was decreased by NPY in fed chicks, but plasma concentrations of norepinephrine and epinephrine were increased significantly by NPY in fasted-heat exposed chicks. Furthermore, NPY significantly reduced plasma corticosterone concentrations in fasted chicks. Plasma glucose and triacylglycerol were increased by NPY in fed chicks, but triacylglycerol declined in fasted NPY-injected chicks. In conclusion, brain NPY may attenuate the reduction of food intake during heat stress and the increased brain NPY might be a potential regulator of the monoamines and corticosterone to modulate stress response in heat-exposed chicks. •NPY decreased rectal temperature in fasted chicks at thermoneutral temperatures.•Orexigenic effect of NPY was appeared under high ambient temperatures.•NPY increased brain dopamine and decreased plasma corticosterone in fasted chicks.•NPY may regulate the stress response to minimize heat stress in chicks.
language: eng
source:
identifier: ISSN: 0143-4179 ; DOI: 10.1016/j.npep.2016.11.008
fulltext: fulltext
issn:
  • 01434179
  • 0143-4179
url: Link


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titleCentral administration of neuropeptide Y differentially regulates monoamines and corticosterone in heat-exposed fed and fasted chicks
creatorBahry, Mohammad A. ; Chowdhury, Vishwajit S. ; Yang, Hui ; Tran, Phuong V. ; Do, Phong H. ; Han, Guofeng ; Ikeda, Hiromi ; Cockrem, John F. ; Furuse, Mitsuhiro
ispartofNeuropeptides, April 2017, Vol.62, pp.93-100
identifierISSN: 0143-4179 ; DOI: 10.1016/j.npep.2016.11.008
subjectNpy ; Rectal Temperature ; Food Intake ; Monoamines ; Corticosterone ; Chicks
descriptionRecently, we demonstrated that brain neuropeptide Y (NPY) mRNA expression was increased in heat exposed chicks. However, the functions of brain NPY during heat stress are unknown. This study was conducted to investigate whether centrally administered NPY affects food intake, rectal temperature, monoamines, stress hormones and plasma metabolites in chicks under high ambient temperatures (HT). Five or six-day-old chicks were centrally injected with 0, 188 or 375pmol of NPY and exposed to either HT (35±1°C) or a control thermoneutral temperature (CT; 30±1°C) for 3h whilst fed or fasted. NPY increased food intake under both CT and HT. NPY reduced rectal temperature 1 and 2h after central administration under CT, but not under HT. Interestingly, NPY decreased brain serotonin and norepinephrine concentrations in fed chicks, but increased concentrations of brain dopamine and its metabolites in fasted and fed chicks, respectively. Plasma epinephrine was decreased by NPY in fed chicks, but plasma concentrations of norepinephrine and epinephrine were increased significantly by NPY in fasted-heat exposed chicks. Furthermore, NPY significantly reduced plasma corticosterone concentrations in fasted chicks. Plasma glucose and triacylglycerol were increased by NPY in fed chicks, but triacylglycerol declined in fasted NPY-injected chicks. In conclusion, brain NPY may attenuate the reduction of food intake during heat stress and the increased brain NPY might be a potential regulator of the monoamines and corticosterone to modulate stress response in heat-exposed chicks. •NPY decreased rectal temperature in fasted chicks at thermoneutral temperatures.•Orexigenic effect of NPY was appeared under high ambient temperatures.•NPY increased brain dopamine and decreased plasma corticosterone in fasted chicks.•NPY may regulate the stress response to minimize heat stress in chicks.
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titleCentral administration of neuropeptide Y differentially regulates monoamines and corticosterone in heat-exposed fed and fasted chicks
descriptionRecently, we demonstrated that brain neuropeptide Y (NPY) mRNA expression was increased in heat exposed chicks. However, the functions of brain NPY during heat stress are unknown. This study was conducted to investigate whether centrally administered NPY affects food intake, rectal temperature, monoamines, stress hormones and plasma metabolites in chicks under high ambient temperatures (HT). Five or six-day-old chicks were centrally injected with 0, 188 or 375pmol of NPY and exposed to either HT (35±1°C) or a control thermoneutral temperature (CT; 30±1°C) for 3h whilst fed or fasted. NPY increased food intake under both CT and HT. NPY reduced rectal temperature 1 and 2h after central administration under CT, but not under HT. Interestingly, NPY decreased brain serotonin and norepinephrine concentrations in fed chicks, but increased concentrations of brain dopamine and its metabolites in fasted and fed chicks, respectively. Plasma epinephrine was decreased by NPY in fed chicks, but plasma concentrations of norepinephrine and epinephrine were increased significantly by NPY in fasted-heat exposed chicks. Furthermore, NPY significantly reduced plasma corticosterone concentrations in fasted chicks. Plasma glucose and triacylglycerol were increased by NPY in fed chicks, but triacylglycerol declined in fasted NPY-injected chicks. In conclusion, brain NPY may attenuate the reduction of food intake during heat stress and the increased brain NPY might be a potential regulator of the monoamines and corticosterone to modulate stress response in heat-exposed chicks. •NPY decreased rectal temperature in fasted chicks at thermoneutral temperatures.•Orexigenic effect of NPY was appeared under high ambient temperatures.•NPY increased brain dopamine and decreased plasma corticosterone in fasted chicks.•NPY may regulate the stress response to minimize heat stress in chicks.
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abstractRecently, we demonstrated that brain neuropeptide Y (NPY) mRNA expression was increased in heat exposed chicks. However, the functions of brain NPY during heat stress are unknown. This study was conducted to investigate whether centrally administered NPY affects food intake, rectal temperature, monoamines, stress hormones and plasma metabolites in chicks under high ambient temperatures (HT). Five or six-day-old chicks were centrally injected with 0, 188 or 375pmol of NPY and exposed to either HT (35±1°C) or a control thermoneutral temperature (CT; 30±1°C) for 3h whilst fed or fasted. NPY increased food intake under both CT and HT. NPY reduced rectal temperature 1 and 2h after central administration under CT, but not under HT. Interestingly, NPY decreased brain serotonin and norepinephrine concentrations in fed chicks, but increased concentrations of brain dopamine and its metabolites in fasted and fed chicks, respectively. Plasma epinephrine was decreased by NPY in fed chicks, but plasma concentrations of norepinephrine and epinephrine were increased significantly by NPY in fasted-heat exposed chicks. Furthermore, NPY significantly reduced plasma corticosterone concentrations in fasted chicks. Plasma glucose and triacylglycerol were increased by NPY in fed chicks, but triacylglycerol declined in fasted NPY-injected chicks. In conclusion, brain NPY may attenuate the reduction of food intake during heat stress and the increased brain NPY might be a potential regulator of the monoamines and corticosterone to modulate stress response in heat-exposed chicks. •NPY decreased rectal temperature in fasted chicks at thermoneutral temperatures.•Orexigenic effect of NPY was appeared under high ambient temperatures.•NPY increased brain dopamine and decreased plasma corticosterone in fasted chicks.•NPY may regulate the stress response to minimize heat stress in chicks.
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