Epstein-Barr virus infection of sinonasal lymphoepithelial carcinoma in Guangzhou

Objectives To investigate the prevalence of sinonasal lymphoepithelial carcinoma (SNLEC) in Guangzhou, a high incidence area of nasopharyngeal carcinoma (NPC), and to dete ct whether it is associated with Epstein-Barr virus (EBV) infection. Methods Twenty confirmed SNLEC specimens were collected from all of the sinonasal carcin oma biopsies performed in the 8 years 1989-1996 at the Sun Yat-sen University o f Medical Sciences. EBV encoded early RNAs were detected by use of in-situ hyb ridization. A variety of antigens, including the EBV nuclear antigen 1, latent membrane protein 1, BZLF1 protein, diffuse early antigen, viral capsid antigen a nd membrane antigen, were detected using immunohistochemistry. Additionally, 36 NPC specimens were used for comparison. Results Twenty SNLECs were identified. Seventeen SNLECs were developed in the nasal cav ity, and 3 in the maxillary sinus. The mean age (46.25 y), male to female ratio (3∶1), histopathology and lymphoinfiltration of the 20 SNLECs were id entical with those of the 36 NPCs. Thirteen (65.0%) of the 20 SNLECs showed an expansive growth pattern, while 27 (75.0%) of the 36 NPCs showed an infiltrat ing or mixed growth pattern. The majority of cancer cells in all of the 20 SNLE Cs showed EBV encoded early RNAs. The EBV nuclear antigen 1 expression of SNLEC was less intensive than that of NPC. The expression rate of latent membrane pr otein 1 for SNLEC (3/20,15%) was lower than that for NPC (19/36, 52.8%). The e xpression rates of BZLF1 protein (2/20, 10.0%), diffuse early antigen (19/20, 9 5.0%), viral capsid antigen (15/20, 75.0%), and membrane antigen (13/20, 65.0 %) for SNLEC were higher than those (0/36, 0.0%; 31/36, 86.0%; 18/36, 50%; and 14/36, 38.9%) for NPC. Conclusions SNLEC is not uncommon in Guangzhou. This tumour is also consistently associated with EBV infection like NPC. As compared to NPC, the EBV harbored in SNLECs s eems to express the EBV nuclear antigen 1 weakly and has a lower expression rate of latent membrane protein 1 as well as higher expression rates of EBV lytic pr oducts.     

鼻咽癌中浸润的淋巴类细胞与瘤细胞凋亡的关系

:【目的】研究鼻咽癌中浸润的淋巴类细胞与癌细胞凋亡间的相关性。【方法】收集中山医科大学病理学教研室38例未经治疗的鼻咽癌活检标本。应用TUNEL(TdTmediateddUTPNickEndLabeling)方法定量检测凋亡癌细胞计数(每5000个鼻咽癌细胞中的凋亡细胞数)。以免疫组化法分别检测T细胞,单核/巨噬细胞,B细胞和树突状细胞。【结果】①在未经治疗的鼻咽癌活检标本各例间癌细胞凋亡计数差异很大,平均为(129±139)/5000;②凋亡癌细胞计数与T细胞指数(I,即平均每个高倍视野浸润的T淋巴细胞数)和单核/巨噬细胞指数(moncytemacrophageindex,MMI,即平均每个高倍视野浸润的单核/巨噬细胞数)均呈正相关,P<0.05,但凋亡癌细胞计数与B细胞指数(平均每个高倍视野浸润的B淋巴细胞数)和树突状细胞指数(平均每个高倍视野浸润的树突状细胞数)无相关性,P>0.05。【结论】①代表细胞介导免疫的浸润性T淋巴细胞可以诱导鼻咽癌细胞凋亡;②浸润的单核/巨噬细胞可能主要是癌细胞凋亡的诱导者也可能部分是凋亡的后果;③代表体液免疫的浸润性B淋巴细胞和递呈抗原的树突状细胞与鼻咽癌细胞的凋亡无直接相关性     

高发区鼻咽癌病理组织学类型构成的特点

[目的]复查鼻咽癌高发区2610例鼻咽癌的病理组织学类型,比较未经治疗和复发性鼻咽癌在组织学类型构成方 面的差异,以反映高发区鼻咽癌病理组织学类型构成的特 点。[方法]复查1999年至2000年鼻咽活检4503人次,有适合组 织学分型的鼻咽癌2610例。其中2370例是未经治疗的,240例 是复发性的。比较未经治疗与复发性鼻咽癌病理组织学类 型的构成。[结果]根据世界卫生组织的分型标准,绝大多 数未经治疗的鼻咽癌(2292/2370,96.71％)是非角化性癌,仅 55例(55/2370,2.32％)为角化性鳞状细胞癌。在2292例非角化 性癌中,2088例(2088/2292,91.10％)是鼻咽型未分化癌。与 未经治疗的鼻咽癌相比,角化性鳞状细胞癌在复发性鼻咽 癌中所占的百分率(24/240,10％)以及分化型非角化性癌在 非角化性癌中所占的百分率(40/214,18.69％)均显著增高 (P<0.001)。[结论](1)在鼻咽癌高发区(广州)所见的鼻咽癌大 多数是非角化性癌,其中以鼻咽型未分化癌占绝对优势; (2)在未经治疗的鼻咽癌中,角化性鳞状细胞癌和非角化性 癌两大类在平均年龄和男女比例方面没有差异;(3)在经放 疗后的复发性鼻咽癌中,分化较好的类型比率增高。     

EB病毒在鼻咽癌变过程中作用的研究

小结作者参加“EB病毒在鼻咽癌变过程中作用研究”的结果。包括 :①EB病毒感染与鼻咽癌变的关系 ;②EB病毒血清学与鼻咽癌变的关系 ;③EB病毒在鼻咽癌以外的EB病毒相关性肿瘤中的作用 ;④EB病毒编码产物在鼻咽癌变中的作用。文章强调下列观点 :①EB病毒开始感染异型性上皮细胞是鼻咽癌变的早期分子事件 ;②EB病毒LMP1可在上皮癌变中起关键作用 ;③检测血清中两种以上的抗EB病毒抗体可以提高鼻咽癌血清学诊断的效益     

鼻咽癌上皮性标志表达的异质性及其组型研究

采用免疫组化方法，应用一组抗癌胚抗原(CEA)、上皮膜抗原(EMA)和不同分子量细胞角蛋白抗体，对128例不同组织学类型鼻咽癌上应性标志的表达进行了研究。结果表明，鼻咽癌上皮性标志的表达既存在明显异质性，也存在一定规律性。鼻咽癌上皮性标志和细胞角蛋白的表达均可分别归纳为4种表达组型。这些表达组型与鼻咽癌组织学类型密切相关。一定的组织学类型总是显示一定相应的上皮性标志和细胞角蛋白的表达组型。在鼻咽癌的角化性鳞癌与腺癌、角化性鳞癌与非角化性癌、非角化性癌与鼻咽型未分化癌的鉴别中，抗细胞角蛋白单抗的应用是有实用价值的。     

ADENOSQUAMOUS CARCINOMA OF THE NASOPHARYNX CONTAININGEB VIRUS，APROPOS OF A CASE

ＡＤＥＮＯＳＱＵＡＭＯＵＳＣＡＲＣＩＮＯＭＡＯＦＴＨＥＮＡＳＯＰＨＡＲＹＮＸＣＯＮＴＡＩＮＩＮＧＥＢＶＩＲＵＳ，ＡＰＲＯＰＯＳＯＦＡＣＡＳＥＺｈａｎｇＦｅｎｇ张锋；ＺｈａｎｇＣｈａｎｇｑｉｎｇ张昌卿；ＺｈａｎｇＪｉｎｘｉａ张锦霞；ＺｏｎｇＹｏｎｇｓｈ...     

早期鼻咽非角化性癌E-钙黏素和β-链接素的表达及其生物学意义

钙黏素 (ｃａｄｈｅｒｉｎｓ)及链接素 (ｃａｔｅｎｉｎｓ)在细胞与细胞的黏附连接中起着十分关键的作用。钙黏素及链接素表达异常与肿瘤的发生发展有关。我们对早期鼻咽非角化性癌中Ｅ 钙黏素和 β链接素的表达特征 ,及其与组织学类型和癌细胞分化程度的关系进行了研究 ,现报告如下。一、材料与方法收集我院早期鼻咽非角化性癌 (Ｔ1～ 2Ｎ0Ｍ0 )活检标本32例 ,采用ＬＳＡＢ免疫组化试剂盒 ,(ＫＯ6 81,Ｄａｋｏ产品 )检测Ｅ 钙黏素和 β 链接素的表达。抗Ｅ 钙黏素抗体 (ＴｒａｎｓｄｕｃｔｉｏｎＬａｂｏｒａｔｏｒｉｅｓｏｆＢｅｃｔｏｎ…     

纤维镜对鼻咽癌鼻腔侵犯的检出及疗效观察

1989年11月～1991年6月,在利用纤维镜、CT、间接镜对141例鼻咽癌鼻腔受侵的检查中,纤维镜的检出频度(61.7％)高于CT和间接镜,差异有非常显著性;CT的误诊率10.3％,漏诊率31.0％,间接镜的漏诊率54.6％;纤维镜下鼻腔受侵犯可分为游离突入和粘膜浸润二种类型,70Gy/7周后,后者的肿瘤残留率是前者的10倍(3.7％和36.7％)。纤维镜是目前诊断鼻咽癌鼻腔受侵最好的工具。     

EVALUATION OF COMBINED EBNA1—IgA AND EA—IgG ASSAYS IN SEROLOGICAL DIAGNOSIS OF NASOPHARYNGEAL CARCINOMA

To evaluate the value of combined assays of serum EBNA1-IgA and EA-IgG for serological diagnosis of nasopharyngeal carcinoma(NPC).Methods:The serum EBNA1-IgA and EA-IgG were tested by use of ELISA for 56 patients with NPC and 58 healthy adults.The sensitivity,specificity,positive predictive value,accuracy rate and odds ratio of the 2 tests used singly or in combination were compared with each other.Results:The sensitivity of EBNA1-IgA test(91.09%)was higher than that (87.50%)of EA-IgG test.The specificity of EA-IgG test(87.93%)was higher than that (84.48%) of EBNA1-IgA test.The combined usage of EBNA1-IgA and EA-IgG could enhance the specificity(94.83%),predictive value of a positive test(0.9375),likelihood ratio of a positive test(15.5435) and odds ratio(75.0)for serological diagnosis of NPC.Forty-five NPC patients showed positivity to EBNA1-IgA and EA-IgG concurrently.A positive EA-IgG reaction was demonstrated in 4 out of 5 NPC patients with negative EBNA1-IgA reaction in 6 out of 7 NPC patients with negative EA-IgG result as well.Conclusion:Though high sensitivity and specificity could be obtained by EBNA1-IgA and EA-IgG test,respectively,the combined use of these 2 tests is able to enhancing the reliability of serological diagnosis of NPC.The majority of NPC patients showed positivity to ENBA1-IgA and EA-IgG concurrently.There is a complementary effect through using EBNA1-IgA and EA-IgG for serological diagnosis of NPC.     

鼻咽癌旁柱状上皮鳞状化生过程中上皮性标志表达的变化

采用免疫组化方法，应用一组抗癌胚抗原（ＣＥＡ）、上皮膜抗原（ＥＭＡ）和不同分子量细胞角蛋白（ＣＫ）的抗体，对７８例鼻咽癌癌旁上皮的上皮性标志的表达进行了研究。结果表明，柱状上皮的储备细胞和鳞状上皮的基底细胞的上皮性标志的表达不同。在柱状上皮鳞状化生过程中，一方面是柱状上皮的储备细胞增生并转化为鳞状上皮的“基底细胞”，另二方面，这些“基底细胞”按正常鳞状上皮的分化程序，分化并发育为好状上皮，同时仍保留储备细胞的一些分化特征。因此，鳞状化生上皮与正常被覆鳞状上皮在上皮性标志的表达上仍存在一些差异。