Behavioral, Hormonal, and Serotonergic Responses to Different Restricted Feeding Schedules in Rats.

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Abstrakt

Tytuł:: Behavioral, Hormonal, and Serotonergic Responses to Different Restricted Feeding Schedules in Rats.
Autorzy:: Saeed R; Neuroscience Research Laboratory, Dr. Panjwani Center for Molecular Medicine & Drug Research (PCMD), International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Pakistan.
Mahmood K; Neuroscience Research Laboratory, Dr. Panjwani Center for Molecular Medicine & Drug Research (PCMD), International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Pakistan.
Ali SB; Neuroscience Research Laboratory, Dr. Panjwani Center for Molecular Medicine & Drug Research (PCMD), International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Pakistan.
Haleem DJ; Neuroscience Research Laboratory, Dr. Panjwani Center for Molecular Medicine & Drug Research (PCMD), International Center for Chemical and Biological Sciences (ICCBS), University of Karachi, Pakistan.
Źródło:: International journal of tryptophan research : IJTR [Int J Tryptophan Res] 2022 Jun 20; Vol. 15, pp. 11786469221104729. Date of Electronic Publication: 2022 Jun 20 (Print Publication: 2022).
Typ publikacji:: Journal Article
Język:: English
Imprint Name(s):: Publication: <2016- > : Thousand Oaks, CA : SAGE Publications
Original Publication: Auckland, NZ : Libertas Academica
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Contributed Indexing:: Keywords: Food restriction; corticosterone; hyperactivity; hypoleptinemia; serotonin-1A; tryptophan deficiency
Entry Date(s):: Date Created: 20220627 Latest Revision: 20220716
Update Code:: 20221216
PubMed Central ID:: PMC9218908
DOI:: 10.1177/11786469221104729
PMID:: 35757086
: Czasopismo naukowe

Pełny tekst

To determine the effect of long-term restricted feeding schedules on behavior, serotonergic responses, and neuro-endocrine functions, metabolism of serotonin (5-HT) in the striatum, expression of serotonin-1A (5-HT1A) auto-receptor in the raphe nuclei and circulating levels of leptin and corticosterone were determined in female Wistar rats kept on excessive food restriction schedule. Due to a role of dietary deficiency of tryptophan (Trp) in influencing serotonergic neurotransmission, circulating levels of Trp were also determined. Estimations were done in 2 different restricted feeding models: time-restricted feeding (TRF) and diet restricted (DR). TRF animals were given access to food ad libitum only for 2 hours/day. The DR animals were given a small calculated amount of food each day. We found that chronic food restriction for 5 weeks cause a significant decrease in the body weight and produced hyperactivity in both, TRF and DR animals. Levels of Trp were declined in circulation and in the striatum. Similarly, the levels of 5-HT and its metabolite 5-hydroxyindoleacetic acid (5-HIAA) were decreased in the striatum. Also, the expression of 5-HT1A auto-receptor was declined in the raphe nuclei. These changes in 5-HT metabolism and 5-HT1A auto-receptor expression were more profound in DR animals as compare to TRF animals. Similarly, hypoleptinemia and increased corticosterone found in both models was higher in DR animals. Effect of dietary deficiency of Trp in the modulation of striatal 5-HT metabolism and its consequences on circulating leptin and corticosterone are discussed.
Competing Interests: Declaration of Conflicting Interests: The author declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
(© The Author(s) 2022.)

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