鼻咽癌癌变过程中EBERs表达状况的研究

本文采用重组质粒ｐＳＰ６５（带有ＥＢＥＲｓ的基因）体外转录合成的地高辛标记的单链反义ＲＮＡ探针，用原位杂交方法检测处于癌变不同阶段的鼻咽活检组织中ＥＢＥＲｓ的表达状况。ＥＢＥＲｓ检出率为：鼻咽癌（２３／２４），正常鼻咽组织，慢性炎症增生及单纯性增生和化生（０／３０），异型增生和化生（５／８），头颈部其它肿瘤（０／５），鼻咽癌颈淋巴结转移灶（１／１），进一步证明：（１）ＥＢＶ与ＮＰＣ密切相关；（２）     

Epstein—Barr病毒潜伏状态与鼻咽癌的关系

应用非同位素原位杂交和图像分析法，研究鼻咽癌和慢性鼻咽炎活检标本中，Ｅｐｓｔｅｉｎ－Ｂａｒｒ病毒（ＥＢＶ）ＤＮＡ的分布以及ＥＢ病毒潜伏基因ＢＮＬＦ１和ＢａｍＨ１Ｗ序列的表达。结果显示，高拷贝数的ＥＢ病毒基因组和ＢａｍＨ１Ｗ序列的表达，后者与ＥＢ病毒核抗原１的转录和病毒复制的启动有关，几乎都发生于低分化或未分化鼻咽癌。此外，潜伏基因ＢＮＬＦ１的转录产物即ＬＭＰｍＲＮＡ，在非典型增生的鼻咽上皮中也有表达。以上结果提示，ＥＢＶ游离体的大量复制发生于鼻咽癌演进过程，可能由于低分化或未分化鼻咽癌中病毒启动子的激活；ＬＭＰ的不适当表达可能具有启动鼻咽上皮细胞异型增生的作用。     

鼻咽癌癌前及其高危人群鼻咽上皮组织EB病毒DNA酶基因检测

目的探讨非癌鼻咽上皮细胞发展为鼻咽癌（ＮＰＣ）的过程中,ＥＢ病毒在什么阶段进入鼻咽上皮。方法利用广州中山医科大学肿瘤防治中心四会县防癌基地１９９４年度复查工作及肿瘤医院门诊,收集鼻咽癌及各类“癌前状态”及“癌前病变”患者蜡块４５０余例,应用改进后的多聚酶链反应（ＰＣＲ）方法进行ＥＢＶＤＮＡ酶基因片段扩增检测。结果ＮＰＣ浸润癌组织ＥＢＶＤＮＡ酶基因片段扩增阳性率为９７．３％（１４５／１４９）,ＮＰＣ原位癌４例中,基因阳性者２例,而防癌基地“癌前状态”人群１５５例中阳性者２例,阳性率为１．３％（２／１５５）。临床癌前病变组阳性率为零（０／４７）。结论ＥＢ病毒在非癌鼻咽组织中出现频率十分低,ＥＢ病毒可能在鼻咽上皮癌变后才进入鼻咽上皮,提示ＥＢ病毒可能不是ＮＰＣ的病因。     

表皮生长因子受体在宫颈癌及宫颈癌前病变组织中的表达

表皮生长因子受体（ＥＧＦ－Ｒ）是原癌基因。ｃ－ｅｒｂＢ－１（也称ＨＥＲ－１）的表达产物,它与肿瘤形成的关系日渐受到人们的重视。本研究采用免疫组化方法检测正常宫颈粘膜。宫颈上皮异型增生及宫颈鳞癌组织中ＥＧＦ－Ｒ的表达,探讨ＥＧＦ－Ｒ与宫颈癌发生及生物学行为的关系。１材料与方法１．１材料收集宫颈活检及子宫切除标本１３６例,其中正常宫颈粘膜１０例,宫颈上皮轻度异型增生２２例,中度异型增生１８例,重度异型增生１５例,原位癌８例,早期浸润癌（癌组织浸润间质深度为距基底膜５ｍｍ之内）１５例,浸润癌（癌组织浸…     

鼻咽癌高危人群,癌前病变的确立

１９８６￣１９９５年广东省鼻咽癌高发区对近１０万人，以鼻咽部间接鼻咽镜检查，ＥＢ病毒多种抗体检测，鼻咽光导纤维镜检查，活检组织病理检查及ＥＢ病毒ＤＮＡ、ＥＢＥＲｓ检测等手段进行前瞻性研究。具有下列条件之一者为处于癌前状态；（１）ＥＢ病毒ＶＣＡ／ＩｇＡ≥１：８０；（２）ＥＢ病毒ＥＤＡｂ≥６０％；（３）病毒ＶＣＧ／ＩｇＡ、ＥＡ／ＩｇＡ、ＥＤＡｂ三项中任何单项持纽高滴度或滴度持续升高。经病理检查；鼻咽粘     

中线T细胞淋巴瘤与EB病毒关系的研究

为了解ＥＢ病毒在中线Ｔ细胞淋巴瘤中的感染情况，作者对遵义地区４６例中线Ｔ细胞淋巴瘤进行ＥＢＶ检测，用聚合酶链反应检测ＥＢＶ特征性的ＤＮＡ序列（ＥＢＶＤＮＡ），用ＲＮＡ原位杂交法检测ＥＢＶ编码的ＲＮＡ（ＥＢＥＲ１／２）。结果：ＥＢＶＤＮＡ阳性率为７６．１％（３５／４６）；ＥＢＥＲ１／２阳性率为６７．４％（３１／４６）。鼻腔、鼻咽、口咽Ｔ淋巴瘤ＥＢＥＲ１／２阳性率分别为８８．９％（１６／１８）、７１．４％（５／７）、４７．６％（１０／２１）。在多形细胞性淋巴瘤中，中多形和大多形细胞性ＥＢＥＲ１／２阳性率为８０．０％（１６／２０），小多形细胞性为７３．３％（１１／１５）。结果表明ＥＢＶ感染与中线Ｔ淋巴瘤关系密切，它在该肿瘤的发病中可能起重要作用，中线Ｔ淋巴瘤的ＥＢＶ感染率与解剖学部位有关，多形细胞性淋巴瘤ＥＢＶ感染率较高，特别是中多形和大多形细胞性     

鼻咽癌ＫＤＲ受体信号传导相关蛋白的表达及意义*

目的　分析鼻咽癌组织中ＫＤＲ及其下游信号分子ＰＫＣ-β和ｐ-ＥＲＫ的表达,并探讨上述蛋白表达与鼻咽癌患者临床特征和生存期的关系。方法　免疫组织化学法检测１１０例鼻咽癌和３０例鼻咽良性病变石蜡切片中ＫＤＲ、ＰＫＣ-β和ｐ-ＥＲＫ的表达情况,用Ｓｐｅａｒｍａｎ法分析它们之间的相关性,Ｋａｐｌａｎ-Ｍｅｉｅｒ法计算生存情况,行Ｌｏｇ-ｒａｎｋ检验和Ｃｏｘ比例风险模型分析。结果　鼻咽癌组织中ＫＤＲ、ＰＫＣ-β和ｐ-ＥＲＫ阳性表达率分别为８８.２％（９７／１１０）、６３.６％（７０／１１０）和５１.８％（５７／１１０）,而在鼻咽良性病变阳性表达率低。鼻咽癌组织中ＫＤＲ表达与ＰＫＣ-β及ｐ-ＥＲＫ表达呈正相关（ｒ＝０.２９７,Ｐ＝０.００２;ｒ＝０.３３６,Ｐ＜０.００１）,ＰＫＣ β表达与ｐ ＥＲＫ表达呈正相关（ｒ＝０.３０１,Ｐ＝０.００１）。ＫＤＲ和ｐ-ＥＲＫ表达与原发肿瘤的侵犯范围相关（Ｐ＜００５）;ＰＫＣ β和ｐ ＥＲＫ表达与临床分期相关（Ｐ＜０.０５）;ＫＤＲ和ＰＫＣ-β表达与肿瘤局部复发或远处转移相关（Ｐ＜０.０５）。３种蛋白表达均与总生存不佳相关（Ｐ＜０.０５）。Ｃｏｘ多因素相关分析显示年龄＞５０岁为不良预后因素（Ｐ＜０.０５）。结论　ＫＤＲ及其下游信号分子ＰＫＣ-β和ｐ-ＥＲＫ在鼻咽癌中表达,与鼻咽癌患者的临床特征和预后关系密切。     

C─erbB─2癌基因产物在鼻咽癌原发灶、淋巴结转移灶、细胞系及克隆株中的表达

用抗Ｃ─ｅｒｂＢ─２癌基因产物Ｐ１８５多克隆抗体２１Ｎ，应用免疫组化链菌素亲生物素蛋白─过氧化酶（Ｓ─ｐ）方法，对３５例低分化鼻咽癌组织、１０例鼻咽癌淋巴转移灶组织，１６例慢性鼻咽炎组织，８例人胚鼻咽上皮组织及人鼻咽癌细胞系ＣＮＥ─１、ＣＮＥ─２Ｚ、克隆株ＣＮＥ─２Ｚ─Ｆ１、Ｈ５、Ｂ７中Ｐ１８５的表达进行了检测。结果显示：鼻咽癌组织中ｐ１８５表达率为６２．８％；淋巴结转移灶中Ｐ１８５表达率为８０％；慢性鼻咽炎中Ｐ１８５表达率为６．３％，和鼻咽癌原发灶及淋巴结转移灶比较均有显著性差异（Ｐ〈０．０１）；人胚鼻咽上皮不表达Ｐ１８５。鼻咽癌细胞系ＣＮＥ─２Ｚ、ｃＮＥ─１及克隆株ＣＮＥ─２Ｚ─Ｆ１、Ｈ５、Ｂ７中Ｐ１８５表达不一。结论：鼻咽癌组织中Ｐ１８５呈高表达；鼻咽癌淋巴结转移灶中ｐ１８５表达高于原发灶，提示可能和肿瘤细胞的转移能力及病人预后密切相关；人胚鼻咽上皮及慢性鼻咽炎组织中不表达或极少表达Ｐ１８５，说明Ｃ─ｅｒｂＢ─２癌基因的激活，可能在鼻咽癌发生发展中起重要作用；不同鼻咽癌细胞系及克隆株间Ｐ１８５的表达各异，提示和肿瘤细胞的分化程度、转移能力及其它生物学特性有关。     

鼻咽癌中p53基因突变的研究

目的：探讨鼻咽癌中ｐ５３基因突变情况。方法：用非同位素不对称ＰＣＲ－单链构象多态性技术（ａＰＣＲ－ＳＳＣＰ），分析了鼻咽癌活检组织、细胞株和裸鼠移植瘤中ｐ５３基因第５、６、７和８外显子（ｅｘｏｎ）的基因突变，并对其中ｅｘｏｎ８突变的ＳＵＮＥ－１和ＳＵＮＴ－１进行ＤＮＡ测序。结果：在２０例鼻咽癌活检组织中没有发现突变；但在鼻咽癌细胞株ＣＮＥ１、ＣＮＥ２、ＳＵＮＥ－１和瘤株ＳＵＮＴ－１中存在第８外显子突变，而ＨＫ１为第５外显子突变。ＤＮＡ测序发现ＳＵＮＥ－１和ＳＵＮＴ－１的突变点在ｅｘｏｎ８的密码子（ｃｏｄｏｎ）２８０上，由ＡＧＡ（精氨酸）→ＡＣＡ（苏氨酸）。结论：ｐ５３基因突变热点的ｅｘｏｎ５、６、７和８可能在鼻咽癌变过程中没有重要意义，而在裸鼠移植瘤和细胞株建立过程中起重要作用。ＥＢＶ由于和鼻咽癌的关系密切，在鼻咽癌中可能存在ＥＢＶ编码蛋白与ｐ５３结合或蛋白表达被ＥＢＶ抑制等其他途径使ｐ５３失活。     

涎腺恶性淋巴上皮病变临床病理特征及其与EB病毒的相关性

目的：了解涎腺恶性淋巴上皮病变的临床病理特征及其及埃泼斯坦-巴尔病毒（Epstein-BarrVirus,EBV)的关系。方法：采用原位杂交和免疫组化LSAB法对41例涎腺恶性淋巴上皮病变（Malignantlymphoepithelial lesion,MLEL)进行EBV编码的RBV-endcoded SmallRNAs,EBERs)、及EBV潜在膜蛋白（ＬatentActivator,ZEBRA)检测。结果：（１）本组４１例涎腺ＭＬＥＬ ＥＢＥＲs４０例阳性,阳性率９７.56％。（２）４１例涎腺ＭＬＥＬＬＭＰ１阳性检出率７５.6%（３１／４１）,ＥＢＮＡ２未检出（０／２０）,ＺＥＢＲＡ仅１例阳性。结论：本结果表明ＥＢＶ与ＭＬＥＬ存在密切关系。很可能在其发病中起着重要作用。     

鼻咽癌前期病变中的EB病毒感染

背景与目的：鼻咽癌中的浸润性癌细胞均感染了EB病毒（Epstein-Barr virus．EBV）。前期病变可见于早期鼻咽癌癌旁上皮。本研究旨在通过检测前期病变中的EB病毒,探讨EB病毒感染存鼻咽癌变过程中的作用,及其基因型在鼻咽癌变过程中发生的宿主内演变。方法：采用核酸原位杂交检测15例早期鼻咽癌活检组织中的EB病毒编码RNA（EBV—encoded RNA,EBER）。采用巢式PCR法检测前期病变和癌巢中的EB病毒类型和潜伏膜蛋白1（latent membrane protein 1,LMPI）EB病毒株。具有代表性的LMPI基因羧基末端PCR产物采用四色荧光终止序列技术进行DNA序列分析。结果：所有15例早期鼻咽癌中的绝大多数浸润性癌细胞均呈EBER阳性。在15例的期病变中．14例可检测到EBER阳性的异常上皮细胞和／或浸润性淋巴细胞。单个A型EB病毒可在9例癌巢（11例适用）及9例前期病变（10例通用）的DNA样本中检测到。EB病毒LMP1基因羧基末端在15例癌巢DNA样本中均可检测到,其中14例是30bp缺失型LMP1 EB病毒株,1例是野生型和30bp缺失型LMP1株的混合感染。在11例适合做EB病毒LMP1基因羧基末端扩增的前期病变的DNA样本中,5例呈野生型和30bp缺失型LMP1 EB病毒株的混合感染,4例是单个缺大型LMP1 EB病毒株感染,1例呈单个野生型LMP1 EB病毒株感染,1例呈阴性反应。野生型LMP1基因羧基末端的DNA序列与B95—8细胞的DNA序列完全一致;30bp缺大型LMP1基因羧基末端的DNA序列却其有30bp缺失（密码子：346～355）和4个错义点突变（密码子：334、335、338和366）。结论：鼻咽上皮细胞的EB病毒感染是癌变过程中侵袭前的事件;而在鼻咽癌变过程中,EB病毒基因型会产生宿主内的演变。     

EB病毒DNA在鼻咽病变中的表现

本文通过原位杂交技术检测鼻咽活检组织不同病理改变时EBV—DNA的表现,以探讨EB病毒在鼻咽癌发生过程中的可能作用。结果显示:(1)本实验所有鼻咽低分化癌癌组织均出现EBV—DNA片段,且绝大部分病例的阳性细胞数及细胞阳性强度均在中等以上;(2)无论是鼻咽癌或慢性鼻咽炎病例,所见到的中-重度异型改变上皮或淋巴组织,均有数量不等的细胞存在阳性强度不同的EBV-DNA片段,粘膜下小涎腺内亦常见到一定数量的EBV-DNA片段。结果提示:(1)EB病毒与鼻咽低分化癌关系密切。EBV作为致鼻咽癌病因多因素中的一员是有可能的;(2)患者血清中EB病毒相关抗体,尤其是IgA抗体阳性率和滴度的升高,可能与鼻咽局部EBV感染及/或EBV激活有关;(3)在异型改变上皮中有中等或以上阳性强度EBV-DNA片段的检出,将有可能作为推测鼻咽癌癌前病变的有效指标。     

Loss of p16 expression has prognostic significance in human nasopharyngeal carcinoma.

PURPOSE: p16 is an important inhibitor of cell cycle progression; absence of p16 can thus result in increased cellular proliferation. In nasopharyngeal carcinoma (NPC), absence of p16 has been reported in association with presence of the EBV and pRb. We therefore examined p16, pRb, and EBV-encoded RNA (EBER) expression in biopsy specimens from 84 patients with newly diagnosed NPC, who were treated primarily with curative radiation therapy. Our objective was to determine whether there was a correlation between these parameters and clinical outcome in NPC. EXPERIMENTAL DESIGN: Sections were cut from archival formalin-fixed, paraffin-embedded tumor blocks from NPC patients. p16 and pRb expression were determined using polyclonal and monoclonal antibodies, respectively. The presence of EBV was determined by in situ hybridization for EBER. The percentage of positively staining tumor nuclei was scored for p16 or pRb immunoreactivity. Relative intensity and proportion of cells with EBER signals were also documented. RESULTS: p16 expression was reduced (相似文献   

Molecular pathology parameters in human nasopharyngeal carcinoma

BACKGROUND: To derive a better understanding of the biologic behavior of nasopharyngeal carcinoma (NPC), the authors evaluated a number of molecular variables to address the hypothesis that p53 dysfunction in NPC is associated with Epstein-Barr virus (EBV), increased tumor angiogenesis, lower likelihood of apoptosis, and poorer clinical outcome. MATERIALS: The biopsy samples from 87 NPC patients were obtained and sections were made to detect EBV, using in-situ hybridization; the authors used immunohistochemistry to assess p53, p21(WAF1/CIP1) expression, and microvessel density count (MVD). In situ end labelling was used to evaluate apoptosis and necrosis. Analyses were conducted on the association between each of these variables as well as clinical outcome, including survival and local control. RESULTS: There was a highly significant association between EBV-encoded RNA (EBER) positivity with p53 over-expression in that only 1 out of 32 p53 over-expressing tumors was EBER negative, as opposed to 19 out of 48 p53 negative tumors being EBER negative (P = 0.001). In addition, EBER positivity was highly associated with World Health Organization (WHO) type 3 NPC, Asian/Chinese ethnicity, a lower apoptotic index, and p21 over-expression. p53 over-expression was associated with a higher MVD count. Controlling for age and nodal status, EBER positivity was associated with both improved overall survival (P = 0.02), and disease-free survival (P = 0.04). In contrast, the presence of tumor necrosis was associated with an inferior local control (P = 0.03). CONCLUSION: p53 protein was over-expressed in approximately one third of NPC samples in the current study, and this correlated significantly with the presence of EBER. Epstein-Barr virus status was also associated with WHO type 3 NPC, Asian/Chinese ethnicity, and induction of p21. The presence of EBV appeared to predict for improved survival, the mechanism of which remains to be elucidated in this biologically complex disease.     

STAT3在鼻咽癌中的表达特征及其与bcl-2和LMP1表达的关系

目的:探讨鼻咽癌中信号传导和转录激活子3(STAT3)的表达特征及其与bcl2和EB病毒潜在膜蛋白1(LMP1)表达的关系。方法:采用原位杂交和免疫组化法分别检测62例鼻咽癌组织中EB病毒EBER1的表达和STAT3、bcl2和LMP1蛋白的表达。结果:鼻咽癌中EBER1阳性率为1000%(62/62);LMP1阳性率为613%(38/62);STAT3和bcl2阳性癌细胞占癌细胞总数的百分率跨度分别为50%~950%和0~1000%。STAT3与bcl2表达呈正相关,rs=0444,P=0000。STAT3与LMP1表达无显著相关性。结论:鼻咽癌细胞中STAT3呈持续表达状态(即异常激活状态)。STAT3的异常激活可能通过上调bcl2这一抗凋亡基因的表达,从而延长了鼻咽癌细胞的生存时间。     

Peritumoral SPARC expression induced by exosomes from nasopharyngeal carcinoma infected Epstein-Barr virus: A poor prognostic marker

Epstein-Barr virus (EBV)-associated nasopharyngeal carcinoma (NPC) cells have high metastatic potential. Recent research has revealed that the interaction of between tumor cells and the surrounding stroma plays an important role in tumor invasion and metastasis. In this study, we showed the prognostic value of expression of SPARC, an extracellular matrix protein with multiple cellular functions, in normal adjacent tissues (NAT) surrounding NPC. In the immunohistochemical analysis of 51 NPC biopsy specimens, SPARC expression levels were significantly elevated in the NAT of EBER (EBV-encoded small RNA)-positive NPC compared to that in the NAT of EBER-negative NPC. Moreover, increased SPARC expression in NAT was associated with a worsening of overall survival. The enrichment analysis of RNA-seq of publicly available NPC and NAT surrounding NPC data showed that high SPARC expression in NPC was associated with epithelial mesenchymal transition promotion, and there was a dynamic change in the gene expression profile associated with interference of cellular proliferation in NAT, including SPARC expression. Furthermore, EBV-positive NPC cells induce SPARC expression in normal nasopharyngeal cells via exosomes. Induction of SPARC in cancer-surrounding NAT cells reduced intercellular adhesion in normal nasopharyngeal structures and promoted cell competition between cancer cells and normal epithelial cells. These results suggest that epithelial cells loosen their own binding with the extracellular matrix as well as stromal cells, facilitating the invasion of tumor cells into the adjacent stroma by activating cell competition. Our findings reveal a new mechanism by which EBV creates a pro-metastatic microenvironment by upregulating SPARC expression in NPC.     

High risk Epstein-Barr virus variants characterized by distinct polymorphisms in the EBER locus are strongly associated with nasopharyngeal carcinoma

Whether certain variants of Epstein–Barr virus (EBV) are linked to the pathogenesis of nasopharyngeal carcinoma (NPC), which shows a marked geographic restriction, remains an unresolved issue. We performed a case–control study comparing genomic sequences of EBV isolated from saliva samples of 142 population carriers with those from primary tumour biopsies derived from 62 patients with NPC of Hong Kong. Cluster analysis discovered five EBV subgroups 1A-C and 2A-B amongst the population carriers in contrast to the predominance of 1A and -B in the majority of NPC. Genome-wide association study (GWAS) identified a panel of NPC-associated single nucleotide polymorphisms (SNPs) and indels in the EBER locus. The most significant polymorphism, which can be found in 96.8% NPC cases and 40.1% population carriers of Hong Kong, is a four-base-deletion polymorphism downstream of EBER2 (EBER-del) from coordinates 7188–7191 (p = 1.91 × 10⁻⁷). In addition, the predicted secondary structure of EBER2 is altered with likely functional consequence in nearly all NPC cases. Using the SNPs and indels associated with NPC, genetic risk score is assigned for each EBV variant. EBV variants with high genetic risk score are found to be much more prevalent in Hong Kong Chinese than individuals of other geographic regions and in NPC than other EBV-associated cancers. We conclude that high risk EBV variants with polymorphisms in the EBER locus, designated as HKNPC-EBERvar, are strongly associated with NPC. Further investigation of the biological function and potential clinical application of these newly identified polymorphisms in NPC and other EBV-associated cancers is warranted.     

Expression of Etk/Bmx tyrosine kinase in the tumorigenicity of nasopharyngeal epithelium and its relation with EB virus infection and the apoptosis-related protein Bcl-2

We compared Etk/Bmx expression in nasopharyngeal carcinoma (NPC) and non-neoplastic nasopharyngeal lesions in order to learn whether the expression of this non-receptor protein tyrosine kinase is associated with the development of NPC. We also related Etk/Bmx expression to factors resulting from Epstein-Barr virus (EBV) infection. We used immunohistochemistry (IHC) and in situ hybridization to examine 20 non-neoplastic nasopharyngeal lesions and 49 cases of NPC to assess Etk/Bmx, EB virus latent membrane protein-1 (LMP-1), Bcl-2 and EBV-encoded small RNA-1 expression in these samples. Etk/Bmx expression was present in the basal cell nuclei of the nasopharyngeal epithelium in 1/9 (11.1%) cases of chronic nasopharyngitis and 2/11 cases (18.2%) of dysplasia. While 13/49 (26.5%) NPC cases expressed Etk/Bmx, the difference in frequency between the expression of Etk/Bmx in the non-neoplastic and NPC cases was not significant. Etk/Bmx expression was correlated with the presence of EBER-1 immunopositivity in dysplasia and in NPC but not in chronic nasopharyngitis. The presence of Etk/Bmx immunopositivity was independent of the expression of either LMP-1 or Bcl-2 in either the nasopharyngeal carcinoma or the non-neoplastic lesions. This suggests that in some cases of non-neoplastic and neoplastic nasopharyngeal lesions, Etk/Bmx may participate in regulating epithelial differentiation. While EBV-related small RNA-1 may participate in this regulation, neither LMP-1 or Bcl-2 expression appears to be related to Etk/Bmx expression.     

N2~3期鼻咽癌EGFR、VEGF、EBER表达与放化疗敏感性的关系

[目的]探讨N期鼻咽癌EGFR、VEGF、EBER表达与放化疗敏感性间的关系。[方法]采用免疫组织化学疗法研究143例经病理确诊的鼻咽癌患者组织EBER、EGFR和VEGF表达：定量PCR和酶联免疫吸附法（ELISA）检测92例N。期鼻咽癌患者血浆EB病毒游离DNA（EBV／DNA）、EGFR、VEGF的表达水平,并对92例NH期鼻咽癌随访2年。[结果]N期鼻咽癌EBER、EGFR及VEGF表达阳性牢分别为97．8％（90／92）、95．7％（88／92）和35．9％（33／92）。EBER表达与远处转移、复发及临床缓解相关,VEGF和EGFR表达强度与远处转移均呈正相关。期鼻嘲癌患者血浆EBV／DNA、EGFR、VEGF治疗前与同步放化疗后比较差异均有统计学意义（P均〈0．05）。血浆中EGFR和VEGF表达水平与远处转移相关。[结论]血浆和组织中EGFR和VEGF表达水平均可能与鼻咽癌远处转移相关。