the protease/antiprotease theory of the pathogenesis of emphysema proposes that cigarette smoke attracts alveolar macrophages to distal terminal bronchioles , these in turn releasing neutrophil chemotactic factors which attract circulating polymorphonuclear leucocytes , to release potent proteolytic enzymes ( serine protease ) in addition to the alveolar macrophage protease .
C0036734
serine protease
C0030946
protease