细胞角蛋白17在口腔鳞癌中的表达

目的 研究细胞角蛋白17(CK17)在口腔鳞癌中的表达,以期为口腔鳞癌的诊断和预防提供依据.方法 分别采用实时定量聚合酶链反应、免疫印迹方法和免疫组化方法检测口腔黏膜上皮体外癌变模型、口腔鳞癌细胞株及30例原发口腔鳞癌标本中的CKl7 mRNA及蛋白质的表达.结果 与永生化HIOEC细胞相比,CK17 mRNA在HB5...     

口胶粘膜癌前病变及鳞癌角蛋白表达的免疫组化研究

目的研究口腔粘膜标本中角蛋白的表达与分布。方法利用多克隆抗角蛋白抗体A(575)，采用免疫组化技术。结果从正常口腔粘膜，轻、中、重度异常增生到鳞癌角蛋白表达显著增强。A(575)在所有鳞癌标本中均为阳性，但染色强度深浅不一，且随鳞癌分化程度降低而降低，染色弱的病例其临床分期高，更易发生淋巴结转移。结论角蛋白表达的增强在强化上皮细胞中的致癌基因上起作用，这种强化的积累将加速癌前疾病的进展，因此，A575染色可能为预后提供参考依据。     

细胞角蛋白19mRNA在口腔鳞状细胞癌中表达的研究

目的探讨口腔鳞状细胞癌（OSCC）患者癌组织中细胞角蛋白（CK）19 mRNA的变化和其发生的可能机制以及CK19 mRNA检测的临床应用价值。方法收集未接受过放疗和化疗的20例OSCC患者的手术标本（包括癌组织20块、癌旁组织20块和颈清扫的淋巴结43枚）,采用荧光定量聚合酶链式反应（FQ-PCR）法检测组织内CK19 mRNA的表达,比较CK19 mRNA在上述组织中的相对表达量。结果CK19 mRNA在OSCC癌组织内表达比其在正常口腔黏膜内表达高1.85倍,比其在癌旁组织内表达高1.66倍。9例患者颈清扫淋巴结内CK19 mRNA表达阳性,阳性率为45%（9/20）,而9例患者的22枚淋巴结中CK19 mRNA表达阳性率是81.8%（18/22）,占20例患者43枚淋巴结的41.9%（18/43）。淋巴结CK19 mRNA阳性患者的癌组织与癌旁组织和正常口腔黏膜的表达量比CK19 mRNA阴性患者低。结论CK19 mRNA在OSCC癌组织中的表达高于其在癌旁组织和正常口腔黏膜内的表达,可能是由于癌组织中CK19的合成明显增加所致。淋巴结中CK19 mRNA的表达可以作为检测OSCC淋巴结微转移的指标之一,运用FQPCR法检测淋巴结中CK19 mRNA的表达来检测OSCC的淋巴结微转移比普通病理法检测更灵敏。     

miR-17-5p在口腔鳞状细胞癌中的表达特点及其临床意义

目的:探讨口腔鳞状细胞癌(OSCC)患者肿瘤组织和血浆中miR-17-5p的表达特点及临床意义.方法:选取2009年6月-2013年6月经手术切除的OSCC组织标本和外周血标本各42例,使用qRT-PCR测定miR-17-5p的表达;采用Mann-Whitney U检验分析miR-17表达及预后的相关性. 结果:OSCC组织和血浆中miR-17-5p表达显著上调(P<0.05),与患者性别、年龄、肿瘤分化程度无明显相关(P>0.05),但与肿瘤的TNM分期、淋巴结转移密切相关(P<0.05);术前血浆中miR-17-5p高表达者术后1年的复发率高于低表达者(P <0.05);治愈患者术后血浆中miR-17-5p表达明显低于术前血浆中miR-17-5p含量(P<0.05),而OSCC术后复发患者无明显变化. 结论:miR-17-5p可以作为临床评估OSCC侵袭、转移和术后复发进行评价的重要指标.     

Increased expression of Annexin A2 in oral squamous cell carcinoma

Previously, in vitro cellular carcinogenesis model of oral squamous cell carcinoma (OSCC) was established with 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. In this study, comparative proteomic analysis identified a panel of differentially expressed proteins among these cells, and Annexin A2 shown as one of the significantly up-regulated proteins accompanying cellular transformation. Annexin A2 was further validated for its expression in the three kinds of cells and in the clinical samples of tumour tissues and their adjacent normal epithelia from primary OSCC patients. Western blot analysis and real-time PCR detected increased Annexin A2 protein and mRNA levels in cancerous HB56 and HB96 cells over HIOECs. Immunohistochemistry showed elevated Annexin A2 protein expression in tumour tissues over the adjacent non-malignant epithelia from OSCC patients; however, the mRNA levels between tumour and normal tissues did not change significantly. Interestingly, levels of Annexin A2 protein expression negatively correlated with the tumour differentiation grades. The results presented here suggest that Annexin A2 protein may play important roles in carcinogenesis of OSCC, and it may also serve as a candidate biomarker for pathologic differentiation grade of OSCC.     

维吾尔族口腔鳞状细胞癌患者中血清鳞状细胞癌抗原的表达研究

目的 探讨维吾尔族口腔鳞状细胞癌(OSCC)患者血清中鳞状细胞癌抗原(SCC-Ag)的表达.方法 采用化学发光法检测90例维吾尔族OSCC患者(OSCC组)和90例维吾尔族其他口腔恶性肿瘤患者(口腔非OSCC恶性肿瘤组)、101例维吾尔族口腔良性肿瘤患者(良性肿瘤组)和120例维吾尔族正常对照者(正常组)的血清SCC-Ag水平,并对其中60例OSCC和60例口腔非OSCC恶性肿瘤患者治疗前后SCC-Ag水平进行检测,分析SCC-Ag在OSCC诊断、治疗疗效中的意义.结果 OSCC组的SCC-Ag水平明显高于口腔非OSCC恶性肿瘤组(P=0.002),良性肿瘤组(P=0.001)和正常组(P=0.001).OSCC患者血清SCC-Ag阳性率为43.3％(39/90),明显高于其他3组(P=0.000 1).OSCC患者TNM晚期的术前SCC-Ag水平的表达高于早期水平(P<0.05).复发组和未复发组的术前、术后、放化疗后SCC-Ag水平相比较,差异均有统计学意义(P＜0.05).手术及放化疗前后鳞状细胞癌患者血清SCC-Ag水平变化差异有统计学意义(P＜0.0 1),然而,在口腔非OSCC恶性肿瘤组治疗疗效差异无统计学意义(P>0.05).结论 血清SCC-Ag对维吾尔族OSCC患者的早期诊断敏感性不高,但在评价治疗疗效,预测肿瘤复发方面有重要的临床意义.     

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.     

口腔鳞癌脉管侵袭的研究

对４４例口腔鳞癌组织切片用抗血型抗原ＡＢＨ抗体作免疫组化染色，以研究癌组织对脉管的侵袭。结果表明，该方法为脉管内皮细胞提供了清晰的染色，显示脉管侵袭的阳性率为４０．９％，显著高于以Ｈ·Ｅ染色显示的阳性率（２０．５％）。口腔鳞癌组织侵袭脉管与其分化程度、生长方式及淋巴结转移有密切关系。作者提示口腔鳞癌脉管侵袭的研究对判断预后有重要意义     

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.     

Immunohistochemical evaluation of intermediate filament proteins in squamous papilloma and oral verrucous carcinoma

OBJECTIVE: Cytokeratins (CKs) are the intermediate filament proteins of the epithelium cells, which have become important markers of normal and abnormal cell differentiation. The goal of the present study was to investigate the expression pattern of CK 10, 13, 14 and 16 in oral verrucous carcinoma (OVC) and oral squamous papilloma (OSP). MATERIAL AND METHODS: Formalin-fixed paraffin-embedded sections from eight cases of each lesion were assessed. Immunohistochemistry was carried out using streptoavidin-biotin complex method. RESULTS: In OVC, CK 10 was expressed in suprabasal to superficial layers whereas in OSP mainly in superficial layer. CK 13 was detected in prickle and superficial cells in most cases of OVC and in suprabasal to superficial cells of OSP. All the cell layers of OVC reacted positively for CK 14 while basal and suprabasal layers of OSP were more pronounced for CK 14. Finally, CK 16 was observed in suprabasal to superficial layer in OVC and the majority cases in OSP showed only superficial reactive cells. CONCLUSIONS: CK 10, 13, 14 and 16 immunohistochemical profile emphasis the biological behavior of the studied lesions and confirm the use of these proteins as markers of differentiation.     

Oestrogens and androgen receptors in oral squamous cell carcinoma

Abstract

Objective. To investigate the gender-related expressions of androgen (AR), estrogen alpha (ERα) and beta (ERβ) receptors and aromatase enzyme in oral squamous cell carcinomas (OSCC). Materials and methods. A total of 60 cases of OSCC (30 from males and 30 from females) were retrieved and submitted to immunohistochemistry. Also, steroid expression was studied in two OSCC cell lines using Western blotting and immunofluorescence. Results. Immunohistochemistry demonstrated that ERβ was expressed in almost 40% of the cases and AR in 26%. Aromatase enzyme and ERα were less commonly expressed. Only AR presented statistically significant differences between genders. Western blotting and immunofluorescence analysis demonstrated that ERβ was abundantly expressed in the nuclei of both cell lines and aromatase enzyme presented a cytoplasmic expression. Conclusion. The detection of steroid hormones, especially ERβ, can indicate a role of these proteins in the process of carcinogenesis of some OSCC. Further studies of the mechanisms involved may provide important biological information regarding therapeutic approaches.     

肿瘤抑制蛋白Maspin在口腔鳞状细胞癌中的表达及意义

目的探讨Maspin蛋白在口腔鳞状细胞癌（OSCC）发生发展过程中的作用,为临床应用提供理论依据。方法采用鼠抗人Maspin单克隆抗体及SP免疫组化法检测45例OSCC、33例癌旁组织及15例正常口腔组织中Maspin蛋白的表达水平,用半定量积分法判断结果。结果在正常口腔组织、癌旁组织和OSCC组织中Maspin蛋白表达阳性率分别为86.67％（13/15）、72.73%（24/33）和37.78%（17/45）。Maspin蛋白在OSCC组织、癌旁组织和正常口腔组织中表达逐渐增高,其中OSCC组织和正常口腔组织、OSCC组织和癌旁组织、癌旁组织和正常口腔组织之间表达差异有统计学意义（P<0.05）。Maspin蛋白的表达与OSCC淋巴结转移和组织学分级有关（P＜0.05）,与TNM分期无关（P＞0.05）。结论Maspin蛋白在OSCC的发生发展过程中可能起着重要作用,检测OSCC组织中Maspin蛋白的表达水平可能有助于对淋巴结转移潜能的预测。     

Antioxidant enzyme levels in oral squamous cell carcinoma and normal human oral epithelium

BACKGROUND: The antioxidant enzymes (manganese- and copper-zinc-containing superoxide dismutases, catalase and glutathione peroxidase) limit cell injury induced by reactive oxygen species. The purpose of the study was to determine whether human oral squamous cell carcinomas have altered antioxidant enzyme levels. This study is the first to undertake this task in human oral mucosa and squamous cell carcinoma. METHODS: Semiquantitative immunohistochemistry was used to examine 26 archived oral squamous cell carcinoma biopsies. Fourteen well-differentiated and 12 poorly differentiated tumors were examined, as were 12 specimens of oral mucosa. All sections were reviewed by two oral and maxillofacial pathologists, and image analysis of the immunostained sections was performed using NIH Image. Antioxidant enzyme staining intensities were compared in the different groups by Duncan's multiple range test. RESULTS: In general, mucosal basal cells displayed lower antioxidant enzyme levels than spinous cells, and primary tumor cells displayed lower antioxidant enzyme staining intensities than did their normal cell counterparts. Moreover, poorly differentiated tumor cells showed lower antioxidant enzyme staining intensities than well-differentiated tumor cells. Manganese-containing superoxide dismutase staining intensities were, however, higher in well-differentiated oral squamous cell carcinomas than their normal cells of origin. CONCLUSIONS: Detection of antioxidant enzymes may be a useful future marker in the molecular diagnosis of the oral cancer. Moreover, it may be possible to not only monitor the effectiveness of chemopreventive and therapeutic strategies in oral cancer using these enzymes, but to monitor tumor recurrence.     

口腔鳞癌与正常黏膜中细胞角蛋白基因13的表达

目的:研究细胞角蛋白基因13(cytokeratin13,CK13)在口腔鳞状细胞癌(oralsquamouscellcarcinoma,OSCC)组织中的表达及意义。方法:用RT-PCR方法检测30例OSCC患者肿瘤组织及其配对的正常黏膜中CK13mRNA的表达,同时用免疫组化方法检测CK13蛋白在OSCC及正常黏膜标本中的表达。所得数据采用Fisher确切概率计算法进行统计学处理。结果:RT-PCR检测结果表明,CK13mRNA在27例OSCC中的表达较其对照黏膜表达下调,平均下调4.2倍;免疫组化染色结果显示,CK13蛋白在正常口腔黏膜与肿瘤组织之间、高分化OSCC与中、低分化OSCC之间的表达差异具有统计学意义(P<0.05)。结论:在OSCC的发生、发展中,CK13基因的转录和表达水平发生明显变化,可能存在转录后水平的表达调控。CK13在OSCC分类诊断中有应用价值。     

microRNA表达调控与口腔鳞状细胞癌

［摘要］ 微小RNA(microRNA,miRNA)属于一类小非编码RNA,可以通过作用于目标信使RNA(messenger RNA, mRNA)来调控生物进程。miRNA具有作为肿瘤生物标志物和药物作用靶点的潜能,因此阐明其在肿瘤发生发展中的作用机制十分重要。口腔鳞状细胞癌(oral squamous cell carcinoma,OSCC)是一种常见的口腔恶性肿瘤,预后不良。该文对miRNA在OSCC中的生物学功能,相关表达谱改变,调控机制和临床应用前景作一综述。