Detailed Explanation
Tripeptide (pGlu-His-Pro-NH₂) produced by the hypothalamus that stimulates the anterior pituitary to release thyroid-stimulating hormone (TSH) and prolactin. TRH is one of the smallest bioactive peptides known — just three amino acids — yet it controls thyroid function for the entire body.
Both terminal modifications (pyroglutamate at the N-terminus and amidation at the C-terminus) are essential for biological activity and provide protease resistance. TRH was the first hypothalamic releasing hormone to be structurally characterized, by Roger Guillemin and Andrew Schally independently in 1969 (both received the Nobel Prize in 1977). TRH also has neuroprotective and analeptic (arousal-promoting) properties being studied for traumatic brain injury and depression.
Key Facts
- Tripeptide (pGlu-His-Pro-NH₂) produced by the hypothalamus that stimulates the anterior pituitary to release thyroid-stimulating hormone (TSH) and prolactin.
- TRH is one of the smallest bioactive peptides known — just three amino acids — yet it controls thyroid function for the entire body.
- Both terminal modifications (pyroglutamate at the N-terminus and amidation at the C-terminus) are essential for biological activity and provide protease resistance.
- TRH was the first hypothalamic releasing hormone to be structurally characterized, by Roger Guillemin and Andrew Schally independently in 1969 (both received the Nobel Prize in 1977).
- TRH also has neuroprotective and analeptic (arousal-promoting) properties being studied for traumatic brain injury and depression.
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