PDCD4、PDCD5及MCL-1蛋白在结直肠癌组织中的表达*
2016-10-12何胜悦
何胜悦, 何 常*
(贵州医科大学附院 病理科, 贵州 贵阳 550004)
·临床研究·
PDCD4、PDCD5及MCL-1蛋白在结直肠癌组织中的表达*
何胜悦**, 何常***
(贵州医科大学附院 病理科, 贵州 贵阳550004)
目的: 探讨程序性死亡因子4 (PDCD4)、5 (PDCD5)及髓样细胞白血病-1(MCL-1)在结直肠癌(CRC)中表达及意义。方法: 应用免疫组化检测PDCD4、PDCD5与MCL-1在CRC(50例)、结直肠腺瘤(20例)和结直肠黏膜慢性炎症(20例)中的表达,同时分析PDCD4、PDCD5及 MCL-1蛋白的表达与CRC患者淋巴结转移、生存期及TNM分期的关系,采用spearman′s方法分析结直肠组织中MCL-1、PDCD4及PDCD5蛋白表达的相关性。结果: PDCD4、 PDCD5 及MCL-1在CRC、结直肠腺瘤、结直肠黏膜慢性炎症中的阳性表达率分别比较,差异有统计学意义(P<0.05);CRC患者标本中,MCL-1与PDCD4(r=-0.401,P<0.05)、PDCD5(r=- 0.445,P<0.05)表达呈负相关,而PDCD4与PDCD5的表达呈正相关(r= 0.510,P<0.05);PDCD4及 MCL-1在CRC组织中的表达与TNM分期、淋巴结转移及5年生存期有关(P<0.05)。结论: CRC发生及发展与PDCD4、PDCD5及MCL-1的蛋白表达有关。
结直肠肿瘤; 程序性细胞死亡因子; 髓样细胞白血病-1; 免疫组织化学
[Abstract]Objective: To explore the expression and clinical significance of PDCD4, PDCD5 and MCL-1 in colorectal cancer (CRC). Methods: The immunohistochemistry was adopted to detect protein levels of PDCD4, PDCD5 and MCL-1 in 50 cases of colorectal cancer, 20 cases of colorectal adenoma and 20 cases of colorectal inflammation. At the same time, the correlation between the expression of PDCD4, PDCD5 and MCL-1 and lymph node metastasis, survival length and TNM staging in patients with colorectal carcinoma was analyzed, and Spearman's method was adopted to analyze the correlation between expression of PDCD4, PDCD5 and MCL-1. Results: There were statistically significant differences in PDCD4, PDCD5 and MCL-1 positive expression rate in the CRC, colorectal adenoma and colorectal inflammation(P<0.05). In CRC patient specimens, MCL-1expresion was negatively correlated with PDCD4 expression(r=-0.401,P<0.05) and PDCD5(r=-0.445,P<0.05) while PDCD4 expression was positively correlated with PDCD5 expression(r=0.510,P<0.05). PDCD4 and MCL-1 expressions in CRC tissues were associated with TNM staging, lymph node metastasis and 5 years survival(P<0.05). Conclusion: The occurrence and development of CRC is correlated with the expression of PDCD4, PDCD5 and MCL-1.
[Key words]colorectal cancer; programmed cell death factor; myeloid cell leukemia-1; immunohistochemistry
近年来,结直肠癌(colorectal cancer, CRC)的发病率与死亡率都呈明显的上升趋势,其机制尚不清楚[1]。有研究认为,CRC的发生、发展和转归与结直肠组织细胞增殖与凋亡的失衡密切相关[2]。程序性细胞死亡因子4 (programmed cell death4,PDCD4)、PDCD 5与髓样细胞白血病-1(myeloid cell leukemia-1,MCL-1)作为凋亡调控分子,影响着细胞周期及凋亡,PDCD表达产物通过抑制相关基因的转录和翻译抑制肿瘤生成,在多种人肿瘤组织细胞中表达缺失或低表达,MCL-1则参与了多种细胞系的凋亡、分化和细胞周期的调控[3-5]。本研究通过检测PDCD4、PDCD 5及MCL-1蛋白的表达,探讨这些细胞因子在CRC中表达的意义。
1 材料与方法
1.1材料与试剂
选取2003年1月~2006年12月行CRC手术,术前未进行化(放)疗的同一组织学类型(管状腺癌Ⅱ级)病例50例,23~81岁,平均52岁;男24例,女26例。选取其中20例远癌处结直肠黏膜慢性炎症组织作为黏膜慢性炎症标本,23岁~48岁, 平均39岁;……
