Hypothalamic-pituitary-adrenal axis-associated receptors (HPA axis receptors)

The hypothalamic-pituitary-adrenal (HPA) axis-associated receptors comprise a group of critical signaling proteins, including Corticotropin-releasing hormone receptors (CRHR1 and CRHR2), the Adrenocorticotropic hormone receptor (MC2R), and the Glucocorticoid and Mineralocorticoid receptors (NR3C1 and NR3C2). These receptors coordinate the neuroendocrine response to stress by regulating the release and feedback inhibition of CRH, ACTH, and cortisol. Dysregulation of these receptors is central to the pathogenesis of mood disorders, chronic inflammatory conditions, and endocrine syndromes such as Cushing's or Addison's disease. Pharmacological intervention typically involves glucocorticoid agonists for replacement therapy or anti-inflammatory effects, and antagonists or modulators for treating hypercortisolism or psychiatric disorders. Because this term refers to a functional system of multiple distinct proteins rather than a single molecular entity, it is considered a collective target category in drug development.

Other names

Stress axis receptorsGlucocorticoid signaling systemCRH-ACTH-Glucocorticoid receptor complex

Drugs targeting this system act as agonists or antagonists to modulate the body's hormonal response to stress, primarily by binding to Corticotropin-releasing hormone receptors (CRHR1/2) or Glucocorticoid receptors (GR) to alter gene transcription or secondary messenger signaling.