Solid-phase enzyme. linked immunosorbent assay and its clinical significance for human neutrophil elastase / 中国病理生理杂志

ABSTRACT

The role of neutrophil in the pathogenesis of many diseases attracts more attentions than before. Neutrophil elastase (NE), a powerful neutrol proteinase capable of causing major tissue destruction in many diseases, is mainly present in the azurophil granules of neutrophil. A solid-phase enzyme-linked immunosorbent-biotin assay for human NE has been developed. Only 20?l of plasma sample is needed. Non-smoking healthy adults have 33.7?6.7ng NE/ml plasma; patients with chronic obstructive pulmonary diseases, 48.0+ 10.9 ng NE/ml; patients with pyogenic dermatisis, 69.1?15.7 ng NE/ml; patients with systemic lupus erythematosus, 61.0?13.9 ng NE/ml; patients with aplastic anemia, only 12.3?5.3 ng NE/ml. All of these results have significant differences compared with the result of healthy adults. The results of assay showed that this quantitative assay with good specificity and accuracy may be a better criterion for investigating the effect of NE on pathogenesis of some diseases.