摘要
目的:观察鼻NK/T细胞淋巴瘤的免疫表型和细胞毒颗粒蛋白的表达及其意义。方法:采用DAKOEnVision两步法在44例鼻NK/T细胞淋巴瘤病例中检测CD3、CD20、CD43、CD45、CD45RO、CD56、CD57和CD79α等8种常用淋巴细胞表面标记物和3种细胞毒颗粒蛋白TIA-1、Granzyrme-B、perforin的表达,观察和分析检测结果,并与发生在相同部位的其他常见恶性淋巴瘤的检测结果进行比较分析。结果:44例鼻NK/T细胞淋巴瘤均表达CD45;CD3阳性率为43%,阳性定位在细胞质;CD56、CD43和CD45RO的阳性率分别为52%、45%和52%,CD20、CD79α和CD57均为阴性。TIA-1、Granzyrme-B和perforin的阳性率分别为100%、930%和95%,对照组的23例鼻腔和鼻咽T、B细胞淋巴瘤中均不表达。结论:鼻NK/T细胞淋巴瘤的免疫表型不一致,并非所有病例显示CD56阳性,石蜡切片中CD3的阳性定位与通常的外周T细胞淋巴瘤不同。细胞毒性颗粒蛋白在肿瘤细胞中的高表达,提示它们可能为NK细胞来源。细胞毒性颗粒蛋白是鼻NK/T细胞淋巴瘤诊断和鉴别诊断重要标志。
Purpose: To study the immunophenotype and the expression of cytotoxic granule proteins of nasal NK/T cell lymphoma and its significance. Methods: 44 cases of nasal NK/T cell lymphoma were studied by the two-step method of DAKO EnVisionTM using a series of antibodies including CD3, CD20, CD43, CD45, CEI45RO, CD56, CD57, CD79α, TIA-1, granzyme-B and perform. Results: All the cases of nasal NK/T cell lymphoma were CD45 positive. 43% of the cases expressed CD3 with positive signal located in the cytoplasm, which was different from peripheral T cell lymphoma. 45% and 52% of the cases were CD43 and CD45RO positive respectively. Cases that reacted to CD56 accounted for 52% of the cases, 43% of which were also positive to CD3. Concerning the reactions to both CD3 and CD56, 10 cases showed CD3 + CD56 + , 13 showed CD3-CD56 + , 9 were CD3 + CD56- and 12 were CD3-CD56-. None of the 44 cases showed positive reaction to CD20, CD79α and CD57. All cases were reactive to TIA-1. 93% and 95% of the cases showed the reactions to granzyme-B and perform. All the controls were negative to TIA-1, granzyme-B and perform. Conclusions: The immunophenotypes of nasal NK/T cell lymphoma showed less consistency. CD56 was not always positive in the cases of this tumor. The different locations of the positive signal to CD3 showed that the cell lineage of this tumor was different from T lymphocytes. The high frequency of the staining by cytotoxic granule proteins, TIA-1, granzyme-B and perform, showed that these cells may have originated from NK cells. The distinctive differences in immunohistochemical staining of cytotoxic granule proteins in nasal NK/T cell lymphoma make their detection very useful and important in diagnosis and differential diagnosis.
出处
《中国癌症杂志》
CAS
CSCD
2004年第2期135-138,142,共5页
China Oncology
