鼻息肉是一种常见病,发病率为1%~5%,其发生、发展可能与系统介导的鼻息肉上皮组织免疫逃逸、上皮组织过度增殖,从而导致细胞增殖和凋亡失衡有关〔1〕。Fas和FasL是细胞表面的2种跨膜蛋白,是重要的细胞凋亡相关因子。通过对细胞凋亡的调控,限制某些细胞群落的过分膨胀和萎缩,在? Nasal polyps is a common disease, the incidence rate of 1% to 5%, its occurrence and development may be associated with system-mediated immune escape of epithelial tissue of the nasal polyps, excessive proliferation of epithelial tissue, resulting in cell proliferation and apoptosis imbalance [1 ]. Fas and FasL are two kinds of transmembrane proteins on cell surface and are important apoptosis related factors. Through the regulation of apoptosis, limiting the excessive expansion and shrinkage of some cell populations,