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Dr. Grey AI

Condition

Central Hypothyroidism

Central hypothyroidism is an underactive thyroid caused by a signaling problem in the pituitary or hypothalamus, so the thyroid gets too little prompting to make hormone. Protirelin, a lab-made version of the hormone TRH, has the strongest evidence, and research found its test separated pituitary causes (a blunted response) from hypothalamic ones (a delayed or exaggerated response). It works as a diagnostic aid, proving most valuable in people with known pituitary disease.

Sources: PMID 30645189

Supplements studied
0
Medicines and peptides
1
Graded outcomes
3
No supplement studies yetWe haven’t found supplement studies for Central Hypothyroidism. The medicines and peptides studied for it are listed below.

Prescription medicines and peptides studied, for context

These are not supplements. Most need a prescription, and some are research compounds with no approved use.

1 medicine or peptide

Protirelin (TRH)

Protirelin (TRH): outcomes studied for Central Hypothyroidism
GradeOutcomeEffectSizeStudiesPeopleStudies list
Central Hypothyroidism Diagnosis

TRH test differentiates pituitary (blunted response) from hypothalamic (delayed/exaggerated response) hypothyroidism. In 54% of low T4 cases, CH diagnosis rejected based on normal TSH response. Valuable in patients with known pituitary disease.

Improves (the measure goes up)Large effect29 studies

Studies that measured central hypothyroidism diagnosis

and 26 more on the Protirelin (TRH) page

TSH Adenoma Detection

90% of TSH-secreting adenomas show blunted TSH response to TRH. Sensitivity 64-71%, specificity 96-100%. Distinguishes TSHomas from thyroid hormone resistance syndrome (which shows normal TRH response).

Improves (the measure goes up)Large effect29 studies

Studies that measured tsh adenoma detection

and 26 more on the Protirelin (TRH) page

Pituitary Function Assessment

Assesses functional integrity of pituitary thyrotrophs. Normal response: TSH peak at 20-30 min, returns to baseline by 60 min. Impaired response indicates pituitary disease; exaggerated/delayed response suggests hypothalamic dysfunction.

Improves (the measure goes up)Large effect25 studies

Studies that measured pituitary function assessment

and 22 more on the Protirelin (TRH) page

Key findings

  • Central Hypothyroidism DiagnosisProtirelin (TRH)Improves (the measure goes up)
  • TSH Adenoma DetectionProtirelin (TRH)Improves (the measure goes up)
  • Pituitary Function AssessmentProtirelin (TRH)Improves (the measure goes up)

Studies cited

22 studies from PubMed

  1. The TRH test provides valuable information in the diagnosis of central hypothyroidism in patients with known pituitary disease and low T4 levelsFront Endocrinol (Lausanne), 2023 · PMID 37691613
  2. Thyroid axis activity and dopamine function in depression.Psychoneuroendocrinology, 2021 · PMID 33839430
  3. The Differential Diagnosis of Discrepant Thyroid Function Tests: Insistent Pitfalls and Updated Flow-Chart Based on a Long-Standing ExperienceFront Endocrinol (Lausanne), 2020 · PMID 32695061
  4. Are the thyroid and adrenal system alterations linked in depression?Psychoneuroendocrinology, 2020 · PMID 33068950
  5. The diagnosis and management of central hypothyroidism in 2018Eur J Endocrinol, 2018 · PMID 30645189
  6. TRH and TRH receptor system in the basolateral amygdala mediate stress-induced depression-like behaviors.Neuropharmacology, 2015 · PMID 26107116
  7. 2013 European Thyroid Association Guidelines for the Diagnosis and Treatment of Thyrotropin-Secreting Pituitary TumorsEur Thyroid J, 2013 · PMID 24078411
  8. Novel thyrotropin-releasing hormone analogs: a patent review.Expert opinion on therapeutic patents, 2011 · PMID 22017410
  9. Pituitary tumours: TSH-secreting adenomasBest Pract Res Clin Endocrinol Metab, 2009 · PMID 19945025
  10. The thyrotropin-releasing hormone (TRH)-immune system homeostatic hypothesis.Pharmacology & therapeutics, 2009 · PMID 19000920
  11. TRH-receptor-type-2-deficient mice are euthyroid and exhibit increased depression and reduced anxiety phenotypes.Neuropsychopharmacology : official publication of the American College of Neuropsychopharmacology, 2009 · PMID 19078951
  12. Thyrotropin-releasing hormone stimulation test in patients with pituitary pathologyJ Endocrinol Invest, 2003 · PMID 14646390
  13. Thyrotropin-secreting pituitary tumors: diagnostic criteria, thyroid hormone sensitivity, and treatment outcome in 25 patients followed at the National Institutes of HealthJ Clin Endocrinol Metab, 1999 · PMID 10022404
  14. The clinical impact of the thyrotropin-releasing hormone testThyroid, 1998 · PMID 9827657
  15. Thyrotropin-releasing hormone (TRH): insulin-like action on glucoregulation.Biochemical pharmacology, 1988 · PMID 3143365
  16. Multiple hormonal responses to protirelin (TRH) in depressed patientsPharmacopsychiatria, 1984 · PMID 6404233
  17. Dexamethasone suppression, protirelin stimulation, and insulin infusion in subtypes of recovered depressive patients.Psychiatry research, 1983 · PMID 6413993
  18. Immunoreactivity and serum destruction of N3immethyl-trh.The Journal of clinical endocrinology and metabolism, 1977 · PMID 402384
  19. Oral protirelin (T.R.H.) in depression.Current therapeutic research, clinical and experimental, 1976 · PMID 812670
  20. Protirelin stimulation test and thyroid function during treatment of depression.Archives of general psychiatry, 1975 · PMID 810113
  21. Protirelin (TRH) in depression.Archives of general psychiatry, 1974 · PMID 4214026
  22. Dose-response studies with protirelinLancet, 1971 · PMID 7944876