口腔颌面鳞状细胞癌相关基因的筛选与定量验证

目的 筛选和验证与口腔颌面鳞状细胞癌密切相关的基因，为口腔鳞癌寡核苷酸功能芯片的制作提供可靠的靶标基因。方法 选用近5年口腔鳞癌基因表达谱芯片检测方面的文献资料，按标准筛选可能与口腔鳞癌相关的基因，用22对临床配对肿瘤与正常黏膜组织，采用实时定量PCR技术验证候选基因的表达情况，结合 内参照3-磷酸甘油醛脱氢酶（GAPDH）管家基因进行相对定量分析。结果 在课题组前期筛选到38个口腔鳞癌密切相关基因的基础上，又筛选出8个相关基因，其中富含半胱氨酸酸性分泌蛋白（SPARC）、血小板源生长因子A（PDGF—A）、丝氨酸蛋白酶抑制剂E（SERPIN口）、转化生长因子Cβ1（TGF—β1）、血管内皮生长因子C（VEGF—C）基因分别在16个以上肿瘤组织标本中过表达，细胞角蛋白15（CK15）基因在19个肿瘤标本中低表达，且肿瘤与正常黏膜组织存在差异，具有统计学意义（P〈0．01）。细胞周期D1蛋白基因（CCND1）和细胞凋亡相关的抑制蛋白（BIRC3）基因在肿瘤组织中过表达，但与正常组织差异无统计学意义（P〉0．05）。结论 SPARC、PDGF—A、SERPIN口、TGF-β、、VEGF—C、CK15是与口腔鳞癌密切相关的基因，可作为口腔颌面鳞癌寡核苷酸功能芯片制作的靶标基因。     

Gene expression analysis by oligonucleotide microarray in oral leukoplakia

Background:  Oral leukoplakias (LP) are the most frequent types of oral pre-cancerous lesions, but there is no accurate assessment of this malignant transformation or even genetic diagnosis of the oral epithelial dysplasia. We need to identify the new genetic diagnosis system of the epithelial dysplasia.
Methods:  Oligonucleotide microarray was used to analyze expression patterns of 29 952 genes in 10 LP patients. We compared the different gene expressions between mild dysplasia cases and severe dysplasia cases.
Results:  Ninety-six genes expressed differentially were selected as candidates for up-regulated in severe dysplasia. Subsequently, we further selected 16 genes with highest differentially expression. By hierarchical clustering analysis, the 10 cases were divided mild dysplasia from severe dysplasia.
Conclusions:  The 16 genes are suggested as biomarker gene sets of efficacy and quickly recognized in the development of oral epithelial dysplasia.     

白斑癌变相关基因的表达谱研究

目的 运用cDNA微阵列技术研究口腔白斑组织和口腔鳞癌组织的基因表达谱的变化，为探讨口腔白斑癌变基因提供初步筛选资料。方法 对临床切除的5例口腔白斑和口腔癌组织进行总RNA抽提，逆转录制备探针，纯化后与含有4124个基因的微阵列杂交，杂交后的信号经扫描仪检测和计算机分析后筛选出与白斑癌变相关的基因。结果 对口腔白斑和口腔癌基因表达谱进行分析，发现存在30个差异表达的基因，它们可能与白斑癌变有关。结论 采用cDNA微阵列技术能成功检测出两种不同组织中多个基因的差异表达，为研究白斑癌变机制提供有价值的筛选资料。     

Friend leukaemia insertion (Fli)-1 is a prediction marker candidate for radiotherapy resistant oral squamous cell carcinoma

Radiotherapy is commonly used to treat oral squamous cell carcinoma (OSCC), but its therapeutic effects are unpredictable. To determine which genes correlate with radiation resistance in oral cancer, the authors evaluated radiation sensitivity using a standard colony formation assay with a gene microarray system for seven OSCC cell lines. They found significant associations between dozens of gene-expression levels and radiation resistance of OSCC cell lines. Following analysis of the different radiosensitive cancer cell lines, the friend leukaemia insertion (Fli)-1 gene was selected as a prediction marker gene for OSCC radiotherapy resistance. Fli-1 expression was associated with radiation resistance in OSCC patients. These data help to predict the effects radiation therapy has on OSCC, in turn contributing to the development of alternative radiation therapies.     

口腔疣状癌与口腔鳞状细胞癌差异基因表达的对比分析

目的研究口腔疣状癌与口腔鳞癌组织基因的差异表达，探讨口腔疣状癌（oral Verrucous carcinoma，OVC）与口腔鳞癌（oral squamous cell carcinoma，OSCC）的基因学基础。方法应用cDNA芯片技术对4例OVC和4例OSCC组织mRNA检测，通过芯片杂交、生物信息学处理，找出两者间差异表达基因。结果BioStarH-40芯片发现差异表达基因593条，差异表达基因占15．2％，其中表达增强283条（显著增强59条），表达降低310条（显著降低98条）。结论OVC与OSCC基因表达比较，差异有统计学意义，这些差异可能在各自不同的生物学行为中起重要作用。     

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。     

Expression form of p53 and PCNA at the invasive front in oral squamous cell carcinoma: correlation with clinicopathological features and prognosis

J Oral Pathol Med (2011) 40 : 693–698 Background: Abnormalities in cell‐cycle‐controlling genes are important in the malignant transformation and proliferation of tumors. Among these genes, the tumor suppressor gene p53 is the most notable, and its mutations provide an indicator of tumor progression and prognosis. Proliferating cell nuclear antigen (PCNA) is a highly conserved nuclear protein that is expressed during cell replication and DNA repair. This study examined the expression of p53 and PCNA at the invasive front of oral squamous cell carcinomas (OSCC) by immunohistochemical staining, and investigated the relationship of these proteins to clinicopathological findings and prognosis. Methods: Fifty‐nine biopsy cases of OSCC were examined by immunohistochemical staining. Clinicopathological data were gathered and patient survival was analyzed. Results: The p53 labeling index (p53‐LI) and PCNA labeling index (PCNA‐LI) were examined at the invasive front of the tumors. A high p53‐LI (p53+) was observed in 17 of the 59 cases (28.8%) and a high PCNA‐LI (PCNA+) was observed in 28 of the 59 cases (47.5%). Among the modes of cancer invasion, many of the p53+/PCNA+ cases could be confirmed as highly invasive cancer (P < 0.05). In addition, the p53+/PCNA+ cases showed a high risk of tumor recurrence compared with the other expression forms, and patients with p53+/PCNA+ had a worse prognosis than those with the other expression forms. High labeling indices of p53 and PCNA are associated with poor prognosis in patients with OSCC. Conclusion: We suggest that it is important to investigate the expression of p53 and PCNA at the invasive front of OSCC.     

Oral cancer cells with different potential of lymphatic metastasis displayed distinct biologic behaviors and gene expression profiles

J Oral Pathol Med (2010) 39 168–175 Objective: Oral squamous cell carcinoma (OSCC) often spreads from the primary tumor to regional lymph nodes in the early stage. Better understanding of the biology of lymphatic spread of oral cancer cells is important for improving the survival rate of cancer patients. Methods: We established the cell line LNMTca8113 by repeated injections in foot pads of nude mice, which had a much higher lymphatic metastasis rate than its parental cell line Tca8113. Then, we compared the biologic behaviors of cancer cells between them. Moreover, microarray‐based expression profiles between them were also compared, and a panel of differential genes was validated using real‐time‐PCR. Results: In contrast to Tca8113 cells, LNMTca8113 cells were more proliferative and resistant to apoptosis in the absence of serum, and had enhanced ability of inducing capillary‐like structures. Moreover, microarray‐based expression profiles between them identified 1341 genes involved in cell cycle, cell adhesion, lymphangiogenesis, regulation of apoptosis, and so on. Some genes dedicating to the metastatic potential, including JAM2, TNC, CTSC, LAMB1, VEGFC, HAPLN1, ACPP, GDF9 and FGF11, were upregulated in LNMTca8113 cells. Conclusion: These results suggested that LNMTca8113 and Tca8113 cells were proper models for lymphatic metastasis study because there were differences in biologic behaviors and metastasis‐related genes between them. Additionally, the differentially expressed gene profiles in cancer progression may be helpful in exploring therapeutic targets and provide the foundation for further functional validation of these specific candidate genes for OSCC.     

舌鳞状细胞癌的基因表达谱分析

目的：探讨舌鳞状细胞癌的候选基因。方法：采用包含有4096个cDNA克隆的基因芯片技术,分别对3例舌鳞状细胞癌组织及其相应正常组织进行基因表达谱的比较。结果：3例标本共同表达的差异表达基因共126条,其中Ratio〉2的明显上调基因11条,而Ratio〈0.5的明显下调基因6条。结论：生物信息分析显示：显著差异表达基因与肿瘤的发病机理存在相关性。     

端粒酶催化亚基hTRTmRNA在口腔鳞癌中的表达

目的:探讨口腔鳞癌中端粒酶催化亚基hTRTmRNA的表达。方法:应用原位杂交方法,检测hTRTmRNA在65例口腔鳞癌、25例上皮异常增生及20例正常口腔黏膜中的表达。以地高辛标记,常规杂交后处理。阳性对照为口腔鳞癌,阴性对照为不加探针。采用SPSS10.0统计软件进行χ2检验、Kendall相关分析以及成组比较t检验。结果:hTRTmRNA在正常口腔黏膜上皮组织中呈弱表达(4/20、20.0%),在上皮异常增生组织中表达增强(11/25、44.0%),在口腔鳞癌组织中呈强阳性表达(54/65、83.1%)。hTRTmRNA在口腔鳞癌组织与其他各组阳性表达率差异有统计学意义(P<0.01),并呈正相关关系(P<0.01),但正常口腔黏膜与上皮异常增生间差异无统计学意义(P>0.05);各病理类型间,染色强度构成比差异有统计学意义(P<0.01),但正常口腔黏膜与上皮异常增生间差异无统计学意义(P>0.05)。结论:hTRTmRNA的表达与口腔黏膜细胞的恶性转化密切相关,端粒酶基因的重新激活,可能在口腔鳞癌的发生中起着关键作用。     

口腔鳞癌中RHAMM Mrna的表达研究

目的:探讨细胞内透明质酸结合受体(RHAMM )基因在口腔鳞癌中的表达及其意义。方法:选取14例口腔高分化鳞癌和4例口腔中分化鳞癌,并取自身的癌旁黏膜和正常口腔黏膜作对照。采用逆转录多聚酶链式反应(RT PCR)技术分别检测上述标本RHAMM的mRNA相对含量。结果:RHAMM基因在口腔高分化鳞癌的癌组织、癌旁黏膜及正常黏膜中都有不同程度的表达,其中癌组织表达量高于正常黏膜和癌旁黏膜(P <0 .0 5 ) ,正常黏膜和癌旁黏膜比较,无显著性差异(P >0 .0 5 )。结论:RHAMM基因可能参与了口腔鳞癌的形成、进展和转移。     

P53 and bcl-2 immunoexpression in patients with oral lichen planus and oral squamous cell carcinoma

Objective: The aim of this study was to determine by immunohistochemistry the presence and significance of p53 and bcl-2 proteins in oral lichen planus (OLP) and oral squamous cell carcinoma (OSCC). Study Design: We used 21 cases diagnosed as OLP 16 diagnosed as OSCC and four normal gingival biopsies taken from healthy patients were used as controls. Slides were processed for immunohistochemistry using anti-p53 and anti-bcl-2 monoclonal antibodies. Results: We found p53 immunoexpression in 71.4% OLP cases and 68.7% OSCC cases, with no immunoexpression in control cases. Bcl-2 was negative for all OLP and OSCC cases, and mild positivity was observed in normal tissue. We found significant correlation among p53 expression and OSCC malignancy. Conclusions: Our results suggest that TP53 system mainly promotes a hyperproliferative state by cell cycle arrest of the OLP epithelial cells for repairing damaged DNA nor apoptosis and that anti-apoptotic action of bcl-2 is not important in this disease. Key words:Oral lichen planus, oral squamous cell carcinoma, p53, Bcl-2, carcinogenesis, malignant transformation.     

半定量PCR检测口腔鳞状细胞癌凋亡蛋白酶活化因子的表达

目的:探讨凋亡蛋白酶活化因子1(APAF1)基因的表达与口腔鳞状细胞癌(OSCC)的关系。方法:用半定量RT-PCR的方法检测18例正常口腔黏膜组织和32例OSCC组织中APAF1的表达情况。结果:OSCC组织中APAF1的表达显著低于正常口腔黏膜(P<0.01)。结论:APAF1基因可能与OSCC的发生、发展有关,可作为OSCC诊断的检测指标。     

口腔鳞癌组织中人乳头瘤病毒16型的原位杂交研究

目的：探讨HPV16-E6基因在口腔粘膜白斑，口腔鳞状细胞癌组织中的表达及其在口腔鳞癌发生、发展过程中的意义及分布特征。方法：应用地高辛标记的HPV16-E6的寡核酸探针分别对口腔鳞状细胞癌组织，口腔粘膜白斑组织，宫颈癌组织及正常组织中进行原位杂交，以检测各组织中HPV16型的DNA表达和分布情况，结果：口腔鳞状细胞癌组织HPV16阳性率46．67％；口腔粘膜白斑组织阳性率60％。HPV16E6基因阳性信号集中分布于癌细胞胞核中。结论：原位杂交方法可用来检测OSCC组织中HPV16型DNA的存在并能准确组织定位；较高的阳性率进一步支持高危型HPV16型的感染与口腔鳞状细胞癌的发生有关；在癌前病损组织中的高危型HPV16的检m率高于口腔鳞癌组织，说明HPV在口腔鳞癌发生的早期阶段可能具有致癌作用。     

miR-99a对口腔鳞癌增殖能力的影响

目的:探讨miR-99a在口腔鳞状细胞中的表达及对口腔鳞癌细胞生物学行为的影响.方法 :检索GEO数据库中与口腔鳞癌相关的miRNA芯片进行二次分析.检测63例口腔鳞癌组织和口腔鳞癌细胞株内miR-99a的表达,分析其与临床病理指标及患者预后之间的关系.上调miR-99a的表达,检测其对口腔鳞癌细胞生长和克隆形成的影响...     

XIAP与口腔鳞癌局部淋巴结转移关系的研究

目的 探究XIAP的表达水平与口腔鳞癌局部淋巴结转移之间的关系。初步评价其表达水平是否可以作为预测口腔癌局部淋巴结转移新的靶基因。方法 收集40例原发口腔鳞癌标本及11例术后复发标本,运用免疫组化技术检测组织标本中XIAP蛋白的表达水平,评价其表达水平与淋巴结转移等临床参数之间的相关性。结果 40例原发口腔鳞癌标本中XIAP在细胞胞浆中均有不同程度的表达,其表达水平与淋巴结转移、病理分级及复发显著相关。结论 实验结果表明,细胞胞浆中XIAP的表达水平与口腔鳞状细胞癌局部淋巴结转移及术后复发密切相关,可能是口腔鳞癌淋巴转移新的促进基因。