Objective To investigate the effect of endothelin receptor antagonist (BQ-123) on expression of matrix metalloproteinase-1(MMP-1) in rats with pulmonary fibrosis induced by bleomycin.

• 目的探讨内皮素受体拮抗剂BQ-123对肺纤维化大鼠基质金属蛋白酶-1表达的影响。