CD137在鼻息肉嗜酸粒细胞中的表达及意义

目的了解CD137在鼻息肉(NP)组织浸润的炎性细胞中的表达及分布情况,研究CD137与嗜酸粒细胞(EOS)积聚及与NP病变范围的关系,探讨其在炎症反应和在NP生长中的作用.方法选择NP住院手术患者44例,按慢性鼻窦炎鼻息肉临床分型分期标准分为A、B两组;选择因鼻中隔偏曲而行下鼻甲部分切除的标本11例作为对照组.采用免疫组织化学染色法对息肉石蜡切片进行CD137染色,对其染色情况进行观察.结果CD137阳性染色可见于EOS、淋巴细胞、中性粒细胞等炎性细胞中,为胞膜染色;CD137阳性染色A、B两组之间差异具有统计学意义(P<0.01).结论CD137可在NP组织的EOS、淋巴等细胞中表达,与NP组织的EOS化和病变范围相关,可能参与炎症反应,影响EOS释放炎性递质及细胞因子的释放而在NP生长中起重要作用.

The role of CD137 in the growth of nasal polyps

OBJECTIVE: To determine the roles of CD137 in the etiology of nasal polyps by immunohistochemistry. METHOD: Forty-four samples of nasal polyps and 11 control samples were studied. Forty-four samples were divided into group A and B on the basis of the endoscopic findings, computed tomography and the criterion of chronic sinusitis and nasal polyp classification. The slides were stained with antibody CD137. Positive eosinophils of CD137 in selected samples were observed. All data were analyzed with chi2 test using SPSS10.0 software. RESULT: Positive CD137 immunostainning show a significant difference between group A and B. CONCLUSION: Eosinophil and cytokine plays an important role in the mechanism leading to the growth of nasal polyps. The tissue eosinophils of nasal polyps express CD137. The closed relation was shown among the expression of CD137, the tissue eosinophilia and extent of nasal polyps. This result indicates the CD137 expression might limit GM-CSF-mediated and IL-5-mediated antiapoptosis of eosinophils.