大肠癌组织中Fas配体表达与肿瘤浸润淋巴细胞凋亡的关系  

Relationship between Fas ligand expression in colorectal cancer tissues and apo ptosis of tumor-infiltrating lymphocytes

作　　者：朱强[1] 刘吉勇[1] 张春清[1] 杨崇美[1] 朱菊人[1] 

机构地区：[1]山东省立医院消化科,济南250021

出　　处：《中华消化杂志》2004年第1期31-33,共3页Chinese Journal of Digestion

摘　　要：目的　探讨大肠癌组织Fas配体 (FasL)表达与肿瘤浸润淋巴细胞 (TIL)凋亡的关系。方法　应用免疫组织化学染色和原位杂交方法 ,检测 3 0例大肠癌组织连续切片的FasL蛋白和mRNA的表达。应用免疫组织化学染色和原位末端杂交标记法 (TUNEL)检测 3 0例大肠癌组织连续切片的FasL表达阴性区和阳性区中TIL细胞总量和正处于凋亡状态的TIL细胞数。TUNEL法检测 3 0例大肠癌不同FasL表达区肿瘤细胞的凋亡情况。结果　①大肠癌组织FasL呈高表达 ,3 0例大肠癌组织中均有FasL表达 ,且每张切片中均有 75%以上的组织表达FasL。②FasLmRNA的表达部位与FasL蛋白的表达部位相对应。③不论是在同一组织切片不同部位或两组织切片间相比 ,FasL表达程度和范围都不均匀。同一组织切片中 ,FasL阳性表达区TIL细胞数比FasL阴性表达区减少 ,后者是前者的 2 .88倍。④同一组织切片中 ,FasL阳性表达区正在凋亡的TIL细胞数比FasL阴性区增多 ,前者是后者的 2 .13倍。⑤FasL表达阴性区肿瘤细胞的凋亡率 (81.2 % )比FasL阳性区 (3 7.4% )高 (P <0 .0 1)。结论　大肠癌细胞可通过表达FasL ,诱导TIL发生凋亡 。Objective To study the relationship between expression of Fas ligand (FasL) in colorectal cancer tissues and apoptosis of tumor-infiltrating lymphocytes (TIL). Methods FasL protein and its mRNA were measured by immunohistochem istry and in situ hybridization in the consecutive tissue slices of 30 colorecta l cancers respectively. Immunohistochemistry and terminal deoxynucleotidyl tra nsferase mediated dUTP nick end labeling assay (TUNEL) were used to detect the cell count of TIL and the count of TIL being apoptosis in both negative and pos i tive regions of FasL in the consecutive tissue slices of cancers respectively. T UN EL method was used to detect apoptosis of tumor cells among different FasL expre ssion regions. Results ①High expression of FasL was examined in 30 cases of colo rectal cancer; there were expressions of FasL in more than 75% tissues in each slice. ②In the consecutive tissue slices, the location of expression of FasL protein corresponded with that of FasL mRNA. ③FasL expression was not eve n in the same or among different tissues. The cell count of TIL was less in FasL positive region than that in FasL negative region in the same tissue, the latt er be ing as 2.88 times as the former. ④ The cell count of TIL being apoptotic in the positive regions was as 2.13 times as that in the negative ones. ⑤ Apoptotic r ate of tumor cells was higher in FasL negative region (81.2%) than that in FasL positive region (47.4%, P <0.01). Conclusions Colorectal cancer cells can induce the apoptosis of TIL through the expression of FasL, which can counterattack the immune system.

关 键 词：FAS配体 大肠肿瘤 免疫反击 肿瘤浸润 淋巴细胞 细胞凋亡 

分 类 号：R735.34[医药卫生—肿瘤]