p73在口腔黏膜白斑和口腔鳞癌中的表达

目的：观察p73在口腔黏膜白斑和口腔鳞癌中的表达,了解p73在口腔鳞癌发生过程中的变化规律。方法：白斑病理标本20例,口腔鳞状细胞癌病理标本31例,另取正常口腔黏膜10例,采用免疫组化检测方法观察p73的表达。应用SPSS11.0软件包对实验结果进行χ^2检验和单因素方差分析。结果：口腔白斑和口腔鳞癌病变组织中p73的表达率分别为65%和90.3%,均显著高于正常黏膜组（20%）,且随组织恶性程度增高呈明显上升趋势,正常黏膜上皮组、白斑组与鳞状细胞癌3组间比较,差异有统计学意义（P〈0.05）。结论：p73的表达与口腔鳞癌的癌变过程密切相关,可作为口腔白斑癌变的标志物。     

口腔黏膜癌前病变及口腔鳞癌中的bFGF的表达及意义

目的 探讨口腔黏膜癌前病及口腔鳞癌的发生、发展过程中bFGF的表达及意义。方法 应用免疫组织化学方法对10例正常口腔黏膜、27例口腔扁平苔藓、24例口腔白斑及30例口腔鳞癌分别进行检测。结果 口腔鳞癌组织中bFGF高表达，明显高于正常口腔黏膜、口腔扁平苔藓和口腔白斑组织（P＜0．05）；口腔扁平苔藓和口腔白斑组织中bFGF表达高于正常口腔黏膜（P＜0．05）。结论 bFGF的过表达在口腔鳞癌的发生、发展过程中起着十分重要的作用，可以将其作为预测口腔黏膜恶变潜能的重要标志物。     

口腔黏膜癌前病变及口腔鳞癌中bFGF的表达及意义

目的　探讨口腔黏膜癌前病变及口腔鳞癌的发生、发展过程中bFGF的表达及意义。方法　应用免疫组织化学方法对 10例正常口腔黏膜、2 7例口腔扁平苔藓、2 4例口腔白斑及 3 0例口腔鳞癌分别进行检测。结果　口腔鳞癌组织中bFGF高表达 ,明显高于正常口腔黏膜、口腔扁平苔藓和口腔白斑组织 (P <0 .0 5 ) ;口腔扁平苔藓和口腔白斑组织中bFGF表达高于正常口腔黏膜 (P <0 .0 5 )。结论　bFGF的过表达在口腔鳞癌的发生、发展过程中起着十分重要的作用 ,可以将其作为预测口腔黏膜恶变潜能的重要标志物     

PTEN、p53在口腔黏膜白斑和口腔鳞癌组织中的表达及意义

目的:探讨抑癌基因PTEN、p53在口腔黏膜白斑(oralleukoplakia,OLK)和口腔鳞癌(oralsquamouscellcancer,OSCC)组织中的蛋白表达及意义。方法:应用免役组化S-P法检测10例正常口腔黏膜、25例口腔黏膜白斑(其中白斑伴上皮异常增生15例,白斑不伴上皮异常增生10例)及32例口腔鳞癌组织中抑癌基因PTEN和p53的蛋白表达情况,分析两者之间的相互作用关系及其在口腔鳞癌发生、发展过程中的作用。结果:正常口腔黏膜和白斑不伴上皮异常增生组织中PTEN蛋白全部阳性表达;白斑伴上皮异常增生组织中PTEN蛋白阳性表达率为93. 3%;OSCC组织中PTEN蛋白的阳性表达率为71. 9%,其中高、中、低分化OSCC组织中PTEN蛋白的阳性表达率分别为85. 7%、75%和33. 3%,统计学分析表明PTEN在OSCC组织中的蛋白表达与组织分化程度明显相关(P<0. 05)。正常口腔黏膜组织中p53蛋白阴性表达;白斑组织中p53蛋白的阳性表达率为48%;OSCC组织中p53蛋白的阳性表达率为56. 3%,其中高、中、低分化OSCC组织中p53蛋白的阳性表达率分别为57. 1%、58. 3%和50%,统计学分析表明p53在OSCC组织中的蛋白表达与组织分化程度无明显相关(P>0. 05)。p53阴性表达的14例OSCC组织中有5例PTEN也阴性表达。结论:OSCC组织中PTEN和p53蛋白异常表达,说明PTEN和p53基因突变或缺失     

TRAIL在口腔鳞状细胞癌和白斑中的表达及意义

目的：研究肿瘤坏死因子相关凋亡诱导配体（TNF-related apoptosis inducing ligand,TRAIL）在口腔鳞状细胞癌（OSCC）组织及白斑中的表达及意义。方法：采用免疫组化Maxvision两步法检测54例口腔鳞状细胞癌、30例口腔黏膜白斑、22例正常口腔黏膜组织中TRAIL的表达水平。结果：TRAIL在口腔鳞状细胞癌组织和黏膜白斑中的表达水平均低于其在正常口腔黏膜中的表达水平（P〈0.05）,分别为33.3%、56.7%、86.4%,其在癌组织与白斑中表达水平的差异无统计学意义。TRAIL在高分化癌组织中的表达水平高于中低分化组（P〈0.05）。TRAIL在不同临床分期组间及淋巴结转移与非转移组间表达水平的差异无统计学意义。结论：TRAIL表达的抑制可能与口腔鳞状细胞癌及口腔黏膜白斑的发生有关,并且TRAIL可能参与了初始阶段的正常黏膜向癌组织的转化。TRAIL在口腔鳞状细胞癌中的表达水平与癌组织的分化程度相关。     

CD147和Ki-67在口腔黏膜白斑和鳞癌组织中的表达及意义

目的：观察CD147和ki-67在口腔正常黏膜、白斑和鳞癌组织中表达的变化,阐明CD147在口腔癌发病机制中的作用。方法：采用免疫组织化学法检测10例正常口腔黏膜、20例白斑伴上皮异常增生上皮和40例鳞癌组织中CD147及Ki-67的表达变化。结果：CD147在正常黏膜阴性表达,白斑和鳞癌组上皮均显著表达CD147;正常组Ki-67表达主要位于上皮棘层,鳞癌组织中Ki-67阳性细胞分布广泛,有大部分侵入固有层中。结论：口腔黏膜发生癌前病变时,即出现CD147表达阳性,随着Ki-67阳性细胞数的增多,癌变细胞增殖不断加强,两者共同作用促进鳞癌的发展。     

口腔扁平苔藓、白斑及鳞癌棘细胞形态计量学分析

目的:从形态计量学角度探讨口腔扁平苔藓(OLP)癌变的可能性,并为口腔黏膜良恶性病变的鉴别诊断提供客观参考资料。方法:采用多功能图象分析系统对取自口腔黏膜的正常、口腔扁平苔藓(OLP)、伴轻、中度上皮异常增生白斑(LK)、鳞癌(SCC)的上皮棘层细胞及胞核进行形态计量学研究分析,选择表示细胞及细胞核大小和形状的二维参数9个,体视学参数10个,并比较这些参数在各组间的变化趋势及差异。结果:无论从二维或三维的各项形态学指标,OLP的测量值都处于正常与LK和鳞癌之间,与正常组相比,各参数值多无显著性差异,而与鳞癌组差异显著。结论:OLP是一种介于正常与轻、中度上皮异常增生之间的病变,具有一定的癌变倾向,但癌变潜能低于癌前白斑。二维定量和三维定量结合可更全面地反映口腔黏膜癌变过程中细胞及细胞核的量变质变过程;核质比值、细胞核体积密度可作为鉴别良恶性病变的参考指标。     

激光治疗口腔黏膜白斑研究进展

口腔黏膜白斑是一种表现为口腔黏膜白色斑块或斑片的癌前病变,其治疗一般以防止癌变作为主要目标。目前口腔黏膜白斑的治疗方法包括去除可能的危险因素、局部或全身的药物治疗、外科手术治疗（包括外科传统手术刀治疗、电凝及激光治疗等）、光动力治疗、冷冻治疗等。激光治疗因具有操作简单、出血少、视野好、痛苦小、术后瘢痕小等独特的优势,受到越来越多的重视。文章旨在分析比较各种不同激光治疗口腔黏膜白斑的方法特点,为临床医生选择不同激光提供参考依据。     

激光治疗口腔黏膜白斑研究进展

口腔黏膜白斑是一种表现为口腔黏膜白色斑块或斑片的癌前病变,其治疗一般以防止癌变作为主要的目标。目前治疗方法主要有去除可能的危险因素、局部或全身的药物治疗、外科手术治疗（包括外科传统手术刀切除、电凝及激光治疗等）、光动力疗法、冷冻疗法等。激光治疗因具有操作简单、术中出血少、视野好、患者痛苦小、术后瘢痕小等独特的优势,受到越来越多的重视。文章旨在比较分析各种不同激光治疗口腔黏膜白斑的方法特点,给临床医生提供选择不同激光的参考依据。     

25例口腔鳞癌患者唾液代谢组学分析

目的:用代谢组学方法检测并分析口腔鳞状细胞癌(oral squamous cell carcinoma,OSCC)是否有典型差异代谢物,探讨此方法用于临床诊断或筛查的可行性.方法:利用气相色谱-飞行时间质谱(GC-TOF-MS)代谢组学方法,对OSCC、口腔白斑(OLK)患者以及健康人的唾液标本进行分析,运用SIMCA...     

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。     

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。     

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.     

The prevalence of oral leukoplakia in 138 patients with oral squamous cell carcinoma

OBJECTIVES: To determine the relationship between oral leukoplakia (OL) and oral squamous cell carcinoma (OSCC), and to evaluate possible differences between those carcinomas with and without associated leukoplakia. MATERIAL AND METHODS: A total of 138 patients were studied at the Stomatology Service of the University General Hospital, Valencia, Spain. These patients were divided into two groups: group 1, patients with oral cancer and leukoplakia, and group 2, patients with OSCC but with no associated premalignant lesions. The relationship between this precancerous lesion and the OSCC was evaluated, as well as the possible clinical and histological differences between the tumours of the two groups. RESULTS: Leukoplakia was detected in 27 (19.56%) patients with OSCC. No differences were found between the two groups regarding age and tumour location. However, statistically significant differences were observed with respect to the form, tumour stage and the presence of adenopathies in the cancers with and without leukoplakia; in that the tumours associated with leukoplakia were diagnosed as being at a more initial stage. CONCLUSIONS: Those patients with OL associated with oral cancer presented with tumours at a less advanced stage than those where no associated leukoplakia existed.     

口腔白斑和鳞癌中P_(53)基因突变的PCR─SSCP分析

本实验应用聚合酶链反应－单链构象多态性（PCR—SSCP）分析技术对5例正常口腔粘膜、22例白斑和30例鳞癌中P53基因突变情况进行检测。结果表明，轻、中、重度异常增生白斑，无和有淋巴结转移鳞癌P53突变率为12．5％，37．5％，50．0％，64．3％和75．0％，正常粘膜无一例阳性，白斑和鳞癌间P53变化有显著性差异（P＜0．05）。P53突变与鳞癌有否淋巴结转移无关。     

Midkine expression in oral squamous cell carcinoma and leukoplakia

J Oral Pathol Med (2012) 41 : 21–26 Background: Midkine (MK), a 13‐kDa heparin‐binding growth factor, is overexpressed in various human cancers. However, its role in the development and progression of oral cavity squamous cell carcinoma (OCSCC) is still unclear. Thus, the aim of this study was to evaluate the expression of MK in samples of OCSCC, leukoplakia, and healthy oral mucosa (control). Methods: Surgically excised specimens from patients with primary OCSCC (n = 28) were immunostained for MK, Ki‐67, PCNA, p53, bcl‐2, Bax, and CD31. Besides this, MK expression was also investigated in leukoplakia and normal oral mucosa. The relationship of MK⁺ cells with clinical parameters (tumor location, tumor size, lymph node metastasis, and survival) and microscopic parameters (WHO histological grading, intensity of inflammation, proliferation index, apoptosis, and angiogenesis) was also evaluated. Results: The results showed that MK expression was increased in OCSCC in relation to leukoplakia and normal mucosa. Furthermore, MK expression was increased in late‐stage tumors (T3/T4) compared with early‐stage lesions (T1/T2). MK‐positive lesions also showed increased expression of the anti‐apoptotic protein bcl‐2. Conclusion: OCSCC, particularly late‐stage tumors, exhibits increased MK expression, which may be involved in tumor progression via upregulation of anti‐apoptotic genes, as shown by the augmented bcl‐2 positivity in MK‐positive tumors.     

Concomitant leukoplakia in patients with oral squamous cell carcinoma

OBJECTIVE: There is an ongoing debate on the prevalence of premalignant lesions, in particular leukoplakia, at the time of diagnosis of an oral squamous cell carcinoma (OSCC). The aim of the present study was to determine the presence of concomitant leukoplakia in 100 patients with OSCC, and to evaluate possible differences in clinical and histopathological parameters of the OSCC between those with or without concomitant leukoplakia.PATIENTS AND METHODS: One hundred consecutive patients, 61 men and 39 women, with a histologically proven OSCC were screened on the presence of leukoplakia. Four groups were distinguished: (I) leukoplakia adjacent to the OSCC, (II) combination of leukoplakia adjacent to the OSCC, and leukoplakia at another oral site, (III) leukoplakia present at another oral site, but not adjacent to the OSCC, and (IV) no leukoplakia present.RESULTS: In 47 (47%) patients with OSCC the presence of concomitant leukoplakia was observed. Thirty-six (36%) patients had a leukoplakia adjacent to the OSCC (groups I and II), of which eight (8%) patients (group II) also had a leukoplakia present at another oral site. Eleven (11%) patients (group III) had no leukoplakia adjacent to the OSCC, but a leukoplakia present at another oral site. Fifty-three (53%) patients (group IV) with OSCC had no concomitant leukoplakia present. No differences were noted between men and women, nor was there any preference for an oral subsite with regard to the carcinoma. There were no statistically significant differences in clinical and histopathological presentation of OSCC's between those with or without concomitant leukoplakia.CONCLUSION: Almost 50% of oral squamous cell carcinomas are presumably associated with or preceded by leukoplakia. Early detection and active management of patients with oral leukoplakia may prevent the true development of a number of oral squamous cell carcinomas.     

不同癌基因在口腔白斑和鳞癌中表达的研究

目的 研究正常口腔黏膜，口腔黏膜白斑及口腔鳞癌组织中不同癌基因的表达。方法 通过HE染色确定口腔黏膜组织类型，提取组织中RNA，采用RT－PCR的方法研究不同组织中c-myc、ras、cyclinD1及bcl-2基因的表达。结果 正常口腔黏膜中未见c-myc、ras、cyclinD1及bcl-2基因表达；轻、中、重度异常增生白斑和鳞癌组织中c-myc、ras、cyclinD1及bcl-2基因表达显著增加。结论 c-myc、ras、cyclinD1及bcl-2基因的表达增加与口腔黏膜白斑及鳞癌的发生相关。