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Proliferation and apoptosis in primary gastrointestinal B-cell non-Hodgkin' s lymphoma and its association with Helicobacter pylori
Author(s): 
Pages: 348-352
Year: Issue:  4
Journal: JOURNAL OF PEKING UNIVERSITY(HEALTH SCIENCES)

Keyword:  胃肠疾病淋巴瘤B细胞螺杆菌幽门凋亡增殖;
Abstract: 目的:探讨胃肠B细胞淋巴瘤(B cell lymphoma,BCL)的临床病理特点、不同组织学分型胃肠,BCL肿瘤细胞增殖与凋亡情况,以及BCL与幽门螺杆菌(Helicobacter pylori,HP)的关系.方法:用免疫组化方法进行肿瘤组织学分类、HP的表达、细胞增殖性及凋亡相关因子检测;末端转移酶生物素标记法[TdT(terminal deoxynucleotidyl transferase)dUTP nick end-labeling,TUNEL]检测细胞凋亡数.结果:57例胃肠BCL中,MALT淋巴瘤(mucosa-associated lymphoid tissue,MALT)15例(胃9例,肠6例),弥漫性大B细胞淋巴瘤(diffuse large B cell lymphoma,DLBCL)42例(胃28例,肠14例).MALT和DLBCL的平均凋亡指数(apoptotic index,AI)分别为O.16%和2.54%,平均增殖指数(proliferation index,PI)分别为2.22%、8.71%,p53的阳性表达率分别为6.7%和35.7%,并且PI值(P=0.026)及p53(P=O.044)差异有显著性;而Bcl-2的阳性表达率分别为60.0%、35.7%,HP的阳性率分别为66.7%、23.8%,且差异有显著性(P=0.005).结论:HP与胃肠MALT淋巴瘤关系密切.DLBCL的细胞凋亡和增生活性较MALT高,MALT Bcl-2的高表达可能与其低凋亡率有关.p53促进凋亡,p53基因突变可能在MALT向DLBCL转化过程中起一定的作用.抗HP抗体免疫组化染色必要时可以用于胃肠BCL中的HP检测.
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