Abstract
In mammals and birds, neuropeptide Y (NPY) and gamma-aminobutyric acid (GABA) are found in brain areas known to be involved in the control of ingestive behavior and act to increase voluntary food intake. In rats, significant evidence suggest a functional and behavioral interaction between NPY and GABA mediated transmission in various brain regions, including the arcuate and paraventricular nuclei of the hypothalamus which can be important in the regulation of feeding behavior. In the present study, the effect of intracerebroventricular (ICV) administration of NPY and GABA receptor antagonists on food intake was examined in neonatal chicks. The ICV injection of NPY strongly stimulated food intake while co-administration of NPY and picrotoxin, a GABAA antagonist, (but not CGP54626, a GABAB antagonist) weakened food intake induced by NPY. These results suggest that central NPY stimulates food intake in neonatal chicks by interaction with the GABAergic system via GABAA receptors.
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Abbreviations
- AgRP:
-
Agouti-related protein
- ANOVA:
-
Analysis of variance
- ARC:
-
Arcuate nucleus
- CRF:
-
Corticotrophin releasing factor
- DMSO:
-
Dimethyl sulfoxide
- GABA:
-
Gamma-aminobutyric acid
- ICV:
-
Intracerebroventricular
- NPY:
-
Neuropeptide Y
- PVN:
-
Paraventricular nucleus
- SEM:
-
Standard Error of the mean
- SPSS:
-
Statistical Package for the Social Sciences
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Acknowledgments
This study was supported by “Shahid Bahonar University of Kerman” Kerman, Iran. All experimental protocols were approved by the Research Ethic Committee of Neuroscience Research Center of Kerman, Iran. We are grateful to Mrs. Mary Ward for the English editing of the manuscript.
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Jonaidi, H., Noori, Z. Neuropeptide Y-induced feeding is dependent on GABAA receptors in neonatal chicks. J Comp Physiol A 198, 827–832 (2012). https://doi.org/10.1007/s00359-012-0753-y
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DOI: https://doi.org/10.1007/s00359-012-0753-y