CRH
Also known as: corticotropin releasing hormone, corticotropin releasing factor, CRF
CRH, corticotropin-releasing hormone, is a 41-amino-acid peptide produced by the hypothalamus in response to physical or psychological stress. It initiates the hypothalamic-pituitary-adrenal (HPA) axis, serving as a central component in the body's stress-response system and mediating neuroendocrine, autonomic, and behavioral responses to stress.
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Overview
Mammalian protein found in humans
Corticotropin-releasing hormone (CRH) is a peptide hormone involved in stress responses. It is a releasing hormone that belongs to corticotropin-releasing factor family. In humans, it is encoded by the CRH gene. Its main function is the stimulation of the pituitary synthesis of adrenocorticotropic hormone (ACTH), as part of the hypothalamic–pituitary–adrenal axis.
Mechanism of Action
CRH is secreted from the paraventricular nucleus of the hypothalamus and acts on the pituitary gland by binding primarily to CRHR1, with some interaction with CRHR2, leading to the release of ACTH. ACTH subsequently stimulates cortisol production in the adrenal glands. The functions of CRH extend beyond this hormonal pathway, as demonstrated by brain circuits like those involving amygdala CRH neurons, which influence fight-or-flight behavior and, as shown in a 2025 mouse study, contribute to stress-induced bone loss via sympathetic nervous pathways.
Research History
A hypothalamic factor involved in controlling ACTH release was hypothesized for decades until CRH was successfully isolated and sequenced in 1981 by Wylie Vale's group from sheep hypothalami, marking a significant advancement in neuroendocrinology. CRH-related knowledge expanded to include urocortin peptides, CRHR1 and CRHR2 receptors, and a CRH-binding protein, establishing it as a fundamental model for studying brain peptides in stress adaptation.
What Researchers Are Saying
Community Reports - Not Medical Advice
The following is aggregated from public forums, Reddit, and research communities. These are anecdotal reports from researchers only - not verified clinical data and not a recommendation of any kind.
CRH (also known as corticotropin releasing hormone, corticotropin releasing factor) is studied within the peptide research community. Hypothalamic peptide studied for stress-axis regulation and potential therapeutic applications in depression.
Last updated October 28, 2026
Research status: limited. CRH appears across peptide research forums and academic literature. Researchers note this compound falls in the other category.
Last updated October 28, 2026
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