Dr. Grey AI

Protirelin (TRH)

Peptide

Protirelin is a synthetic tripeptide identical to hypothalamic thyrotropin-releasing hormone (TRH). FDA-approved for diagnostic assessment of thyroid function. Differentiates central from primary hypothyroidism. 90% of TSH-secreting adenomas show blunted TRH response vs normal response in thyroid hormone resistance. Peak TSH response at 20-30 minutes. Half-life ~5 minutes.

Quick Answer

What it is

Protirelin is a synthetic tripeptide identical to hypothalamic thyrotropin-releasing hormone (TRH). FDA-approved for diagnostic assessment of thyroid function.

Key findings

  • Grade A: Central Hypothyroidism Diagnosis (Central Hypothyroidism)
  • Grade A: TSH Adenoma Detection (Central Hypothyroidism)
  • Grade A: Pituitary Function Assessment (Central Hypothyroidism)

Safety

No specific caution or interaction language was detected in the current summary/outcome notes.

⚠️ Research Notice

This peptide information is for educational and research purposes only. Peptides may not be FDA-approved for human use and may only be legally available for research purposes. Consult qualified healthcare professionals before considering any peptide compounds.

ℹ️ Quick Facts: Protirelin (TRH)

Quick Facts: Protirelin (TRH)

  • Best Evidence:Grade A
  • Conditions Studied:1
  • Research Outcomes:6
  • Grade A Findings:3
  • Key Effect:Central Hypothyroidism
A3
B0
C1
D2
1 conditions · 6 outcomes

Detailed Outcomes

A
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.
large↑Improves
A
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).
large↑Improves
A
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.
large↑Improves
C
Depression Symptoms
7 preclinical studies support this finding. Primarily preclinical evidence.
small↓Improves
D
Immune Function
2 preclinical studies support this finding. Primarily preclinical evidence.
small↑Improves
D
Blood Glucose Control
2 human trials support this finding. Human clinical trial data available.
small↓Improves