Objective To investigate the expressions of endothelin 1(ET 1) and endothelin converting enzyme (ECE) mRNA in bronchial mucosal biopsis from asthmatics, and the effect of inhaled corticosteroids on the expressions of ET 1 and ECE genes.

• 目的探讨内皮素1（ET－1）和内皮素转化酶（ECE）mRNA在哮喘气道粘膜的表达，以及吸入激素对其表达的影响。