Increased CRHR1 Expression on Monocytes from Patients with AA Enables a Pro-Inflammatory Response to Corticotrophin-Releasing Hormone

This study examines the role of corticotropin-releasing hormone receptor 1 (CRHR1) on monocytes in 54 alopecia areata (AA) patients compared to 66 controls, revealing that AA patients have significantly higher CRHR1 expression. This increased expression enables a pro-inflammatory response to stress hormones, linking stress to immune disruptions in hair follicles. The study identifies CRHR1 expression and CD14+ monocyte count as independent risk factors for AA, with higher expression in patients with chronic AA or larger lesions. Ethnic differences and glucocorticoid treatment effects on CRHR1 expression were also noted. These findings suggest a connection between stress and autoimmune processes in AA, highlighting the potential for CRHR1 as a biomarker and therapeutic target.