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EB病毒与原发性鼻咽部B细胞性淋巴瘤有关与继发性者无关高

2022-07-29
来源:求医网
摘要目的:对19例鼻咽部B细胞性恶性淋巴瘤与EB病毒(Epstein-Barr virus,EBV)感染的相关性进行研究。方法:利用免疫组织化学及原位杂交方法对EBV进行检测,并用免疫组化及原位杂交双染法标记肿瘤细胞,以鉴定EBV阳性的细胞为B淋巴瘤细胞。结果:EBV编码的小mRNA探针(EBER)原位杂交显示,8例原发性鼻咽部B细胞性恶性淋巴瘤中3例绝大多数肿瘤细胞呈阳性表达,1例潜在性膜蛋白1(latent membrane protein 1, LMP-1)阳性。而11例继发性鼻咽部B细胞性恶性淋巴瘤EBER全部为阴性。全部病例进行了LMP-1检测,除1例原发者,全部阴性。 利用EBER-ISH(EBER原位杂交)和免疫组化CD 标记物进行双标记染色证实,EBER和LMP-1阳性细胞为CD 20阳性,CD 45RO阴性。鼻咽部原发性B细胞性恶性淋巴瘤EBV表达4/8,而继发者为0/11。结论:EBV与鼻咽部原发性B细胞恶性淋巴瘤有较高的相关性,而与继发性者无关。

中国图书资料分类法分类号R739.6

Epstein-Barr virus is associated with primary but not secondary nasal B lymphoma

GAO Zi-Fen, Faith C.S.HO, Alex C.L.CHAN,Qian TAO, Ramond LIANG, Gopesh SRIVASTAVA

(#Department of Pathology, Beijing Medical University, Beijing 100083)

MeSHLymphoma, B-cell/etiolEpstein-Barr virus/pathogenEpstein-Barr virus/isolImmunohistochemistryIn situ hybridization

ABSTRACTObjective: To study the relationship between nasopharyngeal B-cell lymphoma and Epstein-Barr virus(EBV) infection.Methods: Detection of EBV RNA and latent membrane protein 1(LMP-1) was conducted by immunohistochemistry and in situ hybridization(ISH), using ISH for EBER combined with immunohistochemistry for LMP-1 and CD markers, in order to determine whether the EBV positive cells were tumor cells.Results: 19 nasopharyngeal B lymphoma patients were investigated for EBV, ISH for EBER showed signal over virtually all the tumor cell nuclei in the 3/8 primary nasopharyngeal tumors, 1/8 primary case was EBER negative due to RNA degradation but was LMP1 positive. However, all the 11 secondary nasopharyngeal tumors were EBER negative whilst ISH for β-actin mRNA was positive for all these cases. Using ISH for EBER combined with immunohistochemistry for LMP1 and CD markers, the predominant lineage of EBV+ cells was identified as CD20+CD45RO- in one EBER+ case and one LMP1 case. Our results revealed that EBV was present in the tumor cells of 4/8 primary nasal B-cell lymphomas but not in those of secondary nasopharyngeal tumors.Conclusion:Our findings suggest that EBV is associated with the pathogenesis of primary, but not secondary nasopharyngeal B-cell lymphoma.

(J Beijing Med Univ, 1999,31:418-421)

EB病毒可以导致传染性单核细胞增生症和组织细胞坏死性淋巴结炎,与鼻咽癌和一部分胃癌也有较强的相关性[1]。而且EB病毒(Epstein-Barr virus, EBV)与某些类型的淋巴造血系统恶性肿瘤有关。在地方性Burkitt淋巴瘤的发病中100%病例EBV阳性,在非地方性Burkitt淋巴瘤中EBV的表达仅为5%~20%。近年来由于人类免疫缺陷病毒(human immunodeficiency virus, HIV)的感染,艾滋病病人伴有淋巴瘤时EBV的检出率为40%。在西方国家霍奇金病的R-S细胞中50%的病例EBV阳性[2],在我国成人检出率约40%,而在儿童将近100%[3,4]。近来的研究证实鼻咽部T/NK型淋巴瘤与EBV有很高的相关性[5]

不同的研究结果显示T/NK型淋巴瘤与EBV几乎有100%的相关性[5],然而EBV与鼻咽B细胞恶性淋巴瘤的相关性一直不清,报告的研究结果从1例/10例到2例/3例[6]。我们研究了19例鼻咽B细胞性恶性淋巴瘤与EBV感染的情况,显示原发性鼻咽B细胞性恶性淋巴瘤与继发性有显著的不同。

1材料与方法

1.1病例收集

我们选择了香港大学病理系存档的1985~1994年10年间的鼻腔、鼻咽部和鼻窦部位的19例鼻咽B细胞性恶性淋巴瘤(表1)。全部病例按照Kiel分型分类。例1和例3以前曾报道过[5]。所有病例均有石蜡包埋组织块,4个病例同时有冰冻组织。

表1临床特点、肿瘤部位和EBV原位杂交

Table 1Summary of clinical feature,site of involvement and in situ hybridization for EBV

Case no. Sex/Age Site of tumor Diagnosis Neoplastic cells EBER+ β-actin Primary 1 F/66 NP@ ML IB -* - 2 M/52 NP@+T LN L ML IB - + 3 M/60 N@ ML CB 70% ND 4 M/3 NP@ ML B 95% ND 5 F/86 N@ ML BL - + 6 M/61 N@ +LN ML P 90% ND 7 F/62 NP@ ML LC - + 8 M/59 NP@ +LN ML CB - + Secondary 9 M/63 NP@ +T LN S ML LB - + 10 M/70 NP@ +T LN ML CB - + 11 M/85 NP@ ML CB - + 12 M/60 NP@ ML LC - + 13 M/71 NP@ ML LP - + 14 F/26 NP@ ML LP - + 15 M/36 NS@ ML LC - + 16 M/88 NP@+ Palate ML CB - + 17 F/61 NP@ +T N LN ML CB - + 18 M/53 NP@ +LN T ML CB-CC - + 19 M/69 NP@ +LN ML IB - +

@,biopsy site; *,case with RNA degradation but LMP-1(+); %,refers to total tumor cells; +,positive; -,negtive, F,female; M,male; N,nose; NP,nesopharynx; T,tosil; LN,lymph node; NS,nasal sinus; S,spleen; ML,malignant lymphoma; IB,immunoblastic; LB,lymphoblastic; CB,centroblastic; B,Burkitt's; BL,Burkitt like; CC,centrocytic; LC,lymphocytic; P,plasmacytoma; LP,lymphoplasmacytic; ND,not done。1.2原位杂交(in situ hybridization, ISH)

EBV编码的RNA(EBV encorded RNA, EBER)(YO17,Dako)和BHLF-1(Y018)为氢化荧光素异硫氰浓盐(fluorescein isothiocyanates, FITC)标记的寡核苷酸探针。EBER阴性病例用β-actin mRNA(X3302,Dako)检测组织RNA的存在情况。ISH方法参照Dako提供的方法进行,用3 mg·L-1的蛋白酶K200μl消化切片,在37℃下杂交2h,BCIP/NBT显色,阳性信号为细胞核呈蓝紫色,每组实验设EBV感染的细胞系B95-8为阳性对照,阴性为TBS(tris-NaCl buffer solution)取代探针。甲基绿复染核。

1.3免疫组化

应用单克隆抗体CSI-4 检测LMP-1[体积比(下同)1∶10]、PE2检测EBNA2(1∶5)和BZ1检测ZEBRA(1∶10)。抗体为M. Rowe(Birmingham UK)馈赠。用SABC法在石蜡切片上检测EBV蛋白产物,DAB显色。APAAP法进行冰冻切片免疫组化染色。石蜡切片进行潜在膜蛋白(Latent memberane protein 1,LMP-1)检测需经过0.01 mol·L-1的枸橼酸三钠的微波预处理。

1.4