Cited by 168Thyroid Disorders and TreatmentsRegulation of Appetite and ObesityHypothalamic control of reproductive hormones

Inhibition of Hypothalamic Thyrotropin-Releasing Hormone Messenger Ribonucleic Acid during Food Deprivation*

BLAKE, N. G., ECKLAND, D. J. A., FOSTER, O. J. F., LIGHTMAN, S. L.·1991·Endocrinology

Abstract

Food deprivation in laboratory rats induces profound changes in the neuroendocrine system. We have investigated the hypothalamic and pituitary responses of the hypothalamo-pituitary thyroid axis to 48-h food deprivation in Sprague-Dawley rats. Peripheral T3 and hypophysial portal TRH were measured by RIA, and TSH beta, PRL, and pro-TRH mRNA were measured using in situ hybridization histochemistry. Peripheral total T3 was greatly reduced in food-deprived rats. Hypothalamic portal blood TRH levels declined significantly with time in control animals. The initial level of TRH in the portal blood of food-deprived rats was significantly reduced compared to that in controls, but did not fall further with time. In situ hybridization histochemistry revealed significantly lower pro-TRH mRNA in the paraventricular nucleus of food-deprived animals, while pro-TRH mRNA in the reticular nucleus remained unaltered. Furthermore, in the anterior pituitary, TSH beta mRNA decreased significantly in food-deprived animals, while PRL mRNA was unaltered. We conclude that the reduction in circulating T3 after food deprivation appears to be due primarily to decreased hypothalamic TRH synthesis and release.

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Crossref · 10.1210/endo-129-5-2714

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  • Reduced hypothalamic TRH expression, portal serum TRH and pituitary TSH content have been observed both in NTIS patients and NTIS animal models.

    “Indeed, reduced hypothalamic TRH expression, portal serum TRH and pituitary TSH content have been observed both in NTIS patients [65] and NTIS animal models [12, 19, 66, 67].”

    From An update on non-thyroidal illness syndrome (2021) · cites this paper as [66]

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Authors
BLAKE, N. G., ECKLAND, D. J. A., FOSTER, O. J. F., & LIGHTMAN, S. L.
Affiliations
Charing Cross Hospital (GB)
Venue
Endocrinology
Published
1991-11
Volume
129
Issue
5
Pages
2714-2718
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2044918899
Cited by
168
References
25
Citations by year
2024: 2 · 2023: 4 · 2022: 2 · 2021: 3 · 2020: 4 · 2019: 3 · 2018: 6 · 2017: 4 · 2016: 9 · 2015: 5 · 2014: 3 · 2013: 4 · 2012: 6
FWCI
2.39
Type
journal article
Language
en
Open access
closed
Locations
  • Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
food deprivation, thyrotropin-releasing hormone, hypothalamus, hypothalamic-pituitary-thyroid axis, paraventricular nucleus, reticular nucleus, anterior pituitary, prolactin, triiodothyronine, neuroendocrine regulation, thyroid hormone synthesis
MeSH terms
Animals, Food Deprivation, Hypothalamus, Male, Prolactin, Protein Precursors, Pyrrolidonecarboxylic Acid, Rats, Inbred Strains, RNA, Messenger, Thyrotropin, Thyrotropin-Releasing Hormone, Triiodothyronine, Rats

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