马立克氏病病毒对鸡肿瘤相关基因TNFSF13B和ST18表达水平的影响

将150只1日龄雏鸡随机分成2组,100只作为攻毒组,50只作为对照组。攻毒组腹腔注射2 000PFU的马立克氏病病毒（MDV）-GA细胞毒0.2mL;对照组注射同等剂量的病毒稀释液。2组鸡严格隔离,在相同条件的负压隔离器中饲养。攻毒后60d,屠宰所有存活鸡。在对照组中取4个正常鸡的脾脏（HS）;在攻毒组中取4个感染MDV后产生肿瘤鸡的脾脏（TS）及4个感染MDV后未产生肿瘤并表现为健康鸡的脾脏（ANS）,并对TNFSF13B和ST18基因在这些脾脏组织中的表达水平进行荧光定量分析。结果表明,肿瘤相关基因TNFSF13B和ST18的表达在产生肿瘤鸡的脾脏中都是显著性下调的。MDV通过抑制宿主TNFSF13B基因的表达来抑制B细胞分化、成熟进而对宿主免疫系统进行抑制;同时MDV通过下调肿瘤抑制基因ST18的表达,促使机体肿瘤发生。在对MDV有明显抵抗能力的鸡（ANS组）中,TNFSF13B和ST18的表达水平与对照组健康鸡基本一致,表明这2个基因在MDV抗病过程中起着重要作用。

Differential expression of tumor-related genes TNFSF13B and ST18 in chickens infected with Marek's disease virus

One hundred and fifty 1-day-old chicks were divided into two groups randomly.Exprimental group(100 chicks) were infected intraperitoneally with 2 000 plaque-forming units(PFU) of the MDV-GA.The uninfected control group(50 chicks) were injected with the same dosage of diluent(0.2 mL).The two groups were housed in separate cages in the same filtered-air,positive-pressure isolation rooms.At the end of trial period(60 d.p.i.),we dissected all the survivals,and chose healthy spleens(HS) from four age-matched uni...