Because alveolar macrophages (AMs) expressed an abundance of inducible nitric oxide synthase (iNOS) and were important sources of NO in inflamed lung.

• 因为肺泡巨噬细胞表达丰富的诱生型一氧化氮合酶(inducible nitric oxide，iNOS)，是发生炎症的肺组织中NO的重要来源。