膜联蛋白A1表达下降在口腔鳞癌中的意义

目的：研究膜联蛋白A1（ANXA1）在口腔鳞癌中的表达及其与临床病理的关系。方法：应用实时定量PCR、Western印迹方法和免疫组化方法检测ANXA1在口腔鳞癌细胞株和30例原发口腔鳞癌中的表达，采用SPSS10．0软件包对数据进行非参数检验。结果：与人永生化口腔黏膜上皮细胞（HIOEC）相比，Tca8113、TSCC、OSC和NT细胞中ANXA1的mRNA表达降低；Tca8113、TSCC、CAL-27、OSC和NT细胞中ANXA1的蛋白表达降低。30例口腔鳞癌组织标本中，ANXA1的mRNA和蛋白表达均较癌旁组织降低（p〈0．001）。ANXA1的表达水平与肿瘤的病理分化程度有关（mRNA：P=0．007；蛋白：P=0．006），与肿瘤大小、临床分期、淋巴结转移无关。结论：ANXA1在口腔鳞癌中表达降低，可能与肿瘤的发生、发展和组织分化有关。     

E—cadherin在口腔鳞状细胞癌中的表达及其临床意义

应用E—cadherin（E—CD）单克隆抗体通过免疫组织化学ABC方法，对石蜡包埋的40例口腔鳞状细胞癌标本进行分析，探讨E—CD基因的表达与口腔鳞状细胞癌临床病理的关系。结果表明：E—CD阴性表达和弱阳性表达共16例，占40％，细胞膜和细胞浆均见表达。E—CD基因表达与口腔鳞状细胞癌患者性别、年龄、肿瘤临床分期均无明显关系。而E—CD基因表达减弱或阴性口腔鳞状细胞癌患者比阳性者分化低，浸润深．易见淋巴结转移。提示E—CD表达对判断口腔鳞状细胞癌生物学行为有重要作用，是临床判断其恶性程度和制定治疗方案有价值的参考指标。     

Decreased expression of Annexin A1 correlates with pathologic differentiation grade in oral squamous cell carcinoma

Previously, we established an in vitro cellular carcinogenesis model of oral squamous cell carcinoma (OSCC), including the human immortalized oral epithelia cells (HIOECs) and its derived cancerous HB96 cells. In this study, comparative proteomic analysis identified that Annexin A1 was one of the significantly down-regulated genes in the cancerous HB96 cells. To investigate Annexin A1 down-regulation and its potential usefulness as a molecular marker in OSCC, we further screened Annexin A1 expressions with a panel of OSCC lines, and clinical samples of cancerous and the paired adjacent normal tissues from primary OSCC patients. By Western blot analysis and real-time PCR, we showed that both Annexin A1 mRNA and protein expressions decreased in OSCC cell lines except in two cell lines for the mRNA levels. Immunohistochemistry and real-time PCR also showed that both Annexin A1 mRNA and protein expressions decreased in the cancerous tissues from OSCC patients compared with those in the paired adjacent non-malignant epithelia. More importantly, both Annexin A1 mRNA and protein expressions negatively correlated with the pathologic differentiation grades of cancerous tissues. The lower Annexin A1 mRNA or protein expressions correlated with the poorer pathologic differentiation grades. These results suggest that decreased expression of Annexin A1 contributes to the cancerous progression of OSCC, and Annexin A1 may be a potential biomarker for pathologic differentiation grade of OSCC.     

用比较蛋白质组学技术筛选口腔黏膜上皮细胞体外癌变的相关蛋白

目的：探讨口腔黏膜上皮细胞在体外癌变不同阶段表达的差异蛋白质。方法：以口腔黏膜上皮细胞体外癌变模型为对象,采用双向凝胶电泳技术和图像分析软件PDQuest分离和分析不同阶段细胞间的差异蛋白质点,采用LC-MS/MS质谱分析系统鉴定差异蛋白质点,采用Gene Ontology Annotation将已知差异蛋白质进行分类。结果：采用双向凝胶电泳技术和图像分析软件PDQuest,得到差异蛋白质点54个,采用LC-MS/MS质谱鉴定后,共得到候选差异蛋白质45个。根据Gene Ontology Annotation分类,按细胞组成分布最多的差异蛋白质位于细胞质和细胞膜,按分子功能分布最多的是磷酸酶活性、催化活性、结构分子功能和钙离子结合功能,按生物过程分布最多的是代谢过程、细胞信号传导和细胞黏附与运动。结论：比较蛋白质组学方法中的双向凝胶电泳和质谱技术,能够很好分离和鉴定口腔黏膜上皮细胞体外癌变模型中不同阶段细胞的差异蛋白质。     

口腔粘膜癌前病变及鳞癌中RASSF1A基因甲基化与表达的研究

目的 研究RASSF1A基因甲基化状态及其基因表达异常与口腔癌前病变及鳞癌发生发展的关系。方法 采用甲基化特异性PCR（MSPCR）技术检测了10例正常口腔粘膜、8例上皮单纯增生、20例上皮异常增生、32例鳞癌组织中RASSF1A基因甲基化状况；运用逆转录-聚合酶链反应（RT-PCR）研究口腔粘膜癌前病变及鳞癌组织中RASSF1A基因mRNA的表达水平。结果 10例正常口腔粘膜无甲基化。且RASSF1A基因mRNA呈100％表达；8例上皮单纯增生中，有1例甲基化，1例RASSF1A mRNA表达下降；20例上皮异常增生中，有3例甲基化，5例RASSF1A mRNA表达下降；32例鳞癌组织中，有13例甲基化，占40．63％，15例RASSF1A mRNA表达下降或无表达。占46．88％。结论 RASSF1A基因甲基化是口腔癌癌变的早期事件，与口腔鳞癌的发生发展有关。RASSF1A基因甲基化与RASSSF1A基因转录抑制高度相关。     

鳞状细胞癌抗原(SCC-Ag)在口腔鳞癌患者血清中表达的临床意义

用化学发光法检测36例口腔鳞癌、11例口腔颌面部其他恶性肿瘤、45例口腔颌面部良性肿瘤患者以及70例正常人血清中鳞状细胞癌抗原(SCC-Ag)水平。鳞癌组SCC-Ag水平明显高于良性肿瘤组(P<0.01)、正常组(P<0.01)以及其他恶性肿瘤组(P<0.05)。SCC-Ag可作为口腔鳞癌患者辅助诊断指标。     

P-糖蛋白在口腔癌中的表达研究

目的　探讨口腔癌细胞P -糖蛋白表达的程度及其与化疗疗效的关系。方法　以JSB - 1为Ⅰ抗采用免疫组化方法对 2 8例口腔癌患者的化疗前后共 56例标本进行研究。结果　在 2 8例化疗前标本中 ,1 3例表达P -gp阳性 ,占46 .4% ,而化疗后有 1 7例表达阳性 ,占 60 .7% ,无统计意义。根据化疗效果分组 ,有效组 1 1例中只有 4例P -gp表达阳性 ,而无效组 1 7例中则有 1 0例表达P -gp阳性 ,前者占36 .4% ,后者占 58.8% ,二者之间无显著性差异。结论　P - gp在口腔癌中的表达较高 ,且化疗后表达较化疗前高 ,提示了部分口腔癌患者化疗效果不佳可能与之有关     

口腔鳞癌组织中Galectin-1表达及其临床意义

目的:探讨口腔鳞癌组织中半乳糖凝集素1(Galectin-1)基因与蛋白质的表达水平及其临床意义。方法:分别采用荧光实时定量RT-PCR和免疫组织化学方法,检测Galectin-1在30例口腔鳞癌患者的癌组织及癌旁组织中mRNA和蛋白质表达水平,其表达水平与临床病理指标之间的关系采用SPSS10.0软件包进行统计分析。结果:口腔鳞癌组织中Galectin-1 mRNA和蛋白质表达水平均显著高于癌旁组织(P<0.01)。Galectin-1的表达水平与烟酒嗜好、肿瘤大小、淋巴结转移、临床分期、病理分化程度无显著相关性。结论:在口腔鳞癌组织中Galectin-1 mRNA和蛋白质表达上升,可能与肿瘤的发生、发展有关。     

Overexpression of cytokeratin 17 protein in oral squamous cell carcinoma in vitro and in vivo

Objective:  To determine the cytokeratin 17 (CK17) expression in oral squamous cell carcinoma (OSCC) both in vitro and in vivo .
Methods:  Comparative proteomic analysis of an in vitro cellular carcinogenesis model of OSCC (including a line of human immortalized oral epithelia cells (HIOECs), a line of cancerous HB96 cells and another kind of cells (HB56 cells) at the early stage of carcinogenesis was performed to identify differentially expressed proteins. CK17 was further validated in vitro (cellular carcinogenesis model and other three OSCC lines) and in vivo (tissues from six healthy persons and 30 primary OSCC patients) by Western blotting and immunohistochemistry respectively.
Results:  Increased CK17 expression was identified by two-dimensional gel electrophoresis and liquid chromatography–tandem mass chromatography in the HB56 and HB96 cells over HIOECs. Western blotting confirmed the increased CK17 expression in the HB56, HB96 cells and other three OSCC lines. Immunohistochemistry confirmed the increased CK17 expression in the cancerous tissues from OSCC patients compared with the paired adjacent non-malignant epithelia.
Conclusion:  Increased CK17 expression may play an important role in the carcinogenesis progression of OSCC; however, further studies on the molecular function of CK17 are encouraged to clear the precise mechanism of CK17 in OSCC.     

血管生成素受体在口腔癌的表达及其意义

目的探讨血管生成素受体（Tie-2）在口腔癌的表达水平及其在口腔癌血管生成中的作用。方法采用免疫组化SABC法，检测34例口腔癌组织及16例正常口腔粘膜组织中Tie-2、CD34的表达。结果Tie-2、CD34在口腔癌微血管内皮细胞的表达明显高于正常口腔粘膜血管内皮细胞的表达（P〈0．05）。但随口腔癌病理分级的升高，Tie-2、CD34虽呈现递增趋势，但组间比较无显著性差异（P〉0．05）。结论在口腔癌中，血管生成增加。Tie-2可能参与口腔癌血管生成的调节。     

Gene expression profile changes correlated with lymph node metastasis in oral squamous cell carcinoma

The purpose of this research was to identify biomarkers for predicting cervical lymph node metastasis in oral squamous cell carcinoma (OSCC). We surveyed the expressions of 1289 cancer-related genes in 41 cases of OSCC by cDNA array analysis. We extracted genes upregulated or downregulated in their expression in association with lymph node metastasis. Of 1289 cancer-related genes, we identified 39 genes differentially expressed in OSCC with or without lymph node metastasis. Expression levels of 9 genes were lower, and those of 30 genes were higher, in node-positive cases. The genes expressed at higher levels in node-positive cases included angiogenesis-related molecules, cell adhesion molecules, and proteolytic enzymes. We suggest that these characteristic genes could provide, if verifiable, useful information for predicting the risk of lymph node metastasis in OSCC.     

口腔白斑和鳞癌组织中emsl基因扩增的临床意义

目的：探讨emsl基因在口腔白斑和口腔鳞癌组织中扩增的临床意义。方法：采用显微解剖和差示PCR方法在15例正常口腔黏膜组织，30例口腔白斑组织和33例口腔鳞癌组织中检测emsl扩增，Logistic回归分析其与患者临床病理参数之间的相关关系。结果：emsl扩增与口腔鳞癌原发肿瘤大小T分级（P=0．025）、分化程度（P=0．043）、淋巴结状态（P=0．015）、临床分期（P=0．038）有显著相关性。结论：有emsl扩增的口腔鳞癌患者其预后可能较差，提示emsl扩增对OSCC预后有一定的预测价值。     

Hypercalcemia in patients of oral squamous cell carcinoma

Purpose  

This study was performed to measure the total and ionic serum calcium levels and incidence of hypercalcemia in patients with Oral Squamous Cell Carcinoma (OSCC) and its clinical significance and relevance.     

口腔鳞状细胞癌中p27表达及其临床意义

目的 分析口腔鳞状细胞癌p27的表达与临床病理资料及预后的关系。方法 回顾性研究50例口腔鳞状细胞癌及10例正常口腔粘膜p27的表达情况，采用SABC法根据染色指标记数，并利用Cox比例风险模型进行生存多因素分析。结果 p27在所有正常口腔粘膜上皮均呈现高表达，而在口腔鳞状细胞癌组织有30例(60％)至p27表达降低，p27低表达与口腔鳞状细胞癌的临床分期晚、易发生淋巴结转移以及预后差，生存期短显著相关，p27高表达则相反。多因素Cox回归分析表明p27的表达可作为口腔鳞癌辅助性的预后指标。结论 p27的表达与口腔鳞癌的发生发展有密切关系，并与肿瘤的预后密切相关，可作为辅助性的预后指标。     

口腔鳞癌中 LATS2基因 mRNA 与蛋白表达及其相关性

用 RT-PCR 和 Western blot 检测57例口腔鳞癌组织及12例正常口腔黏膜组织中 LATS2 mRNA 和蛋白表达;发现口腔黏膜正常组织中 LATS2 mRNA 和蛋白的表达率为100％;口腔鳞癌组织中 LATS2基因 mRNA 和蛋白的表达率分别为47．4％（27／57）和42．1％（24／57）,二者表达具有明显的相关性（P ＜0．01）,均与患者肿瘤的分化程度及淋巴结转移明显相关（P ＜0．05）。     

DNA histochemical analysis in oral squamous cell carcinoma

BACKGROUND: Recent years have witnessed an increasing emphasis on the role of nuclear DNA and its application in experimental pathological diagnosis to predict prognosis and management of certain neoplasm. AIMS: to establish objective criteria for the degree of differentiation and histochemical quantitative of nuclear DNA of oral squamous cell carcinoma (OSCC) using microspectrophotometric analysis. MATERIAL AND METHODS: The study was conducted on histologic materials from patient with OSCC. Two histological grading systems were used; Broder's and invasive front grading system were recorded. Microspectrophotometry was applied on Feulgen-stained sections to determine the quality of tumour nuclear DNA content in two different histological grading systems of OSCC. RESULTS: Nuclear DNA content increased significantly with decreasing tissue differentiation as well with increasing tumour size. CONCLUSION: The grading system and DNA content provides more objective and accurate criteria which relate the morphologic finding to biologic activity and growth patterns of oral cancer as compared to histologic differentiation alone.     

Bcl-2、MDM2和p21在口腔白斑和口腔鳞状细胞癌中的表达水平研究

目的：了解Bcl-2、MDM2、p21在人口腔正常黏膜、白斑、鳞状癌细胞中的表达情况.方法：采用免疫组化二步法检测15例人正常口腔黏膜、15例单纯增生性白斑、10例异常增生性白斑,25例口腔鳞癌中Bcl-2、MDM2和p21蛋白的表达情况.结果：Bcl-2、MDM2蛋白在异常增生性白斑和口腔鳞癌中的表达明显高于正常口腔黏膜上皮细胞;p21蛋白在异常增生性白斑和口腔鳞癌中的表达明显低于正常口腔黏膜上皮细胞.结论：Bcl-2、MDM2和p21三者与口腔黏膜癌变具有相关性.     

NEK2基因在口腔鳞状细胞癌中的表达及意义

利用 Real-Time PCR 检测细胞周期相关蛋白激酶2（NEK2）mRNA 在20例口腔正常黏膜组织及42例口腔鳞状细胞癌（OSCC）组织中的表达。结果显示，NEK2 mRNA 在 OSCC 中高表达（P ＜0．050），不同分化程度（P ＜0．05）、不同临床分期组间差异具有统计学意义（P ＜0．05）。有无淋巴结转移（P ＞0．05）、不同年龄、不同性别组间差异无统计学意义（P ＞0．05）。NEK2基因表达增高可能参与 OSCC 的形成。     

TFAR19在口腔白斑和口腔鳞癌中表达的研究

目的研究凋亡相关基因tfar19在口腔正常黏膜、口腔白斑和口腔鳞癌组织中的表达及意义。方法采用免疫组织化学方法检测17例正常口腔黏膜、60例口腔白斑,30例口腔鳞癌组织标本中TFAR19蛋白的表达。结果①口腔正常黏膜组TFAR19染色阳性率为88.2%,白斑组TFAR19染色阳性率为63.3%,口腔鳞癌组TFAR19染色阳性率为30%,3组间染色阳性率分别有统计学差异(分别为P≤0.05)。应用Crosstabs相关性统计分析,TFAR19染色阳性率与组织病变恶性度显负相关(r=-0.997,P<0.05)。②口腔正常黏膜、口腔白斑和口腔鳞癌组织的TFAR19细胞染色强度指数分别为199.34±25.33、130.23±19.21,和59.44±13.83,各组间分别有显著性差异。结论tfar19基因在口腔黏膜上皮成癌过程中的确发挥着重要的作用,并且可以推测tfar19基因的表达缺失发生在肿瘤形成的早期。     

口腔白斑和鳞癌组织中ems1基因扩增的临床意义

目的:探讨em s1基因在口腔白斑和口腔鳞癌组织中扩增的临床意义。方法:采用显微解剖和差示PCR方法在15例正常口腔黏膜组织,30例口腔白斑组织和33例口腔鳞癌组织中检测em s1扩增,Logistic回归分析其与患者临床病理参数之间的相关关系。结果:em s1扩增与口腔鳞癌原发肿瘤大小T分级(P=0.025)、分化程度(P=0.043)、淋巴结状态(P=0.015)、临床分期(P=0.038)有显著相关性。结论:有em s1扩增的口腔鳞癌患者其预后可能较差,提示em s1扩增对OSCC预后有一定的预测价值。