BQ-610 is a selective antagonist of the endothelin A receptor (ETA receptor). BQ-610 specifically blocks the ETA receptor, competitively inhibiting the binding of endothelin-1 (ET-1) (a vasoconstrictive peptide) to the receptor, thereby blocking the effects of ET-1 such as vascular smooth muscle contraction, cell mitosis, and inhibition of hormone secretion. BQ-610 significantly alleviates cerebral vasospasm in rabbits. BQ-610 blocks the bronchial epithelial and pulmonary vascular cell proliferation caused by cigarette smoke in rat models. BQ-610 can delay the natural luteal regression in the cow's uterus. BQ-610 can be used for research on vasospasm, abnormal cell proliferation, and reproductive endocrine disorders.
