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1.
增殖细胞核抗原在鼻咽癌中的表达(摘要)李西融,麻承勋,贾太昌,姚春宝,张增峰,邱小芬人体肿瘤的生物学行为与肿瘤细胞的增殖状态密切相关。增殖细胞核抗原(proliferatingcellnuclearantigen,PCNA)是真核细胞DNA合成时必需...  相似文献   

2.
应用增殖细胞核抗原(PCNA)单克隆抗体PC10免疫组化法,DNA含量及细胞核形态图像分析法,对58例鼻咽癌进行检测。结果显示,三种方法的检测结果具有较好的一致性,其中肿瘤细胞的DNA指数和DNA倍体分布最具有价值。结果表明,检测肿瘤细胞增殖活性对于判断鼻咽癌恶性变及估计患者的预后具有重要意义。  相似文献   

3.
吴宏  周明 《耳鼻咽喉》1999,6(6):350-352
目的 以原发性鼻咽癌(NPC)患者为研究对象,检测鼻咽癌组织中P^16/MTS1抑癌基因失活情况:研究鼻咽癌发生发展规律。方法 采用PCR、多重PCR、限制性内切酶解-PCR方法对34例鼻咽癌患者和34例非肿瘤(腺样体增殖及慢性炎症)患者,进行P^16基因纯合缺失的异常甲基化检测。结果:34例NPC患者纯缺失率为8.82%(3/34),异常甲基化率为38.24%(13/34),34例非肿瘤患者纯缺  相似文献   

4.
鼻咽癌是我国南方的一种高发肿瘤,随着医疗技术的进步,对鼻咽癌的研究越来越深入。^18F-脱氧葡萄糖(“F-fluoro ^18-deoxy-glucose,^18F-FDG)的正电子发射计算机断层成像(positron emission computed tomograph,PET)显像作为新一代全身代谢影像检查方法,在一些肿瘤中的应用已日渐成熟,在鼻咽癌中的应用也取得了一定的进展,充分体现了其优越性,成为鼻咽癌的诊断、分期、疗效评价、随访的重要方法之一。  相似文献   

5.
 目的探讨miR 375在鼻咽癌患者中表达的临床意义及其对鼻咽癌细胞的影响。方法收集67例鼻咽癌组织标本和53例慢性鼻咽炎症组织标本,采用qRT PCR检测组织标本和鼻咽癌细胞株CNE1、CNE2、C666 1及人永生化鼻咽上皮细胞株(NP69)中miR 375的表达水平;分别转染miR 375的模拟物或抑制物,CCK8法检测细胞的增殖,Transwell实验检测细胞的迁移;生物信息学靶基因预测miR 375的靶基因,并经双荧光素酶及蛋白质印迹法(Western blotting)验证靶基因。结果鼻咽癌组织中miR 375表达水平与慢性鼻咽炎症组织相比明显下调(P<0.05);miR 375的表达水平与患者的临床分期、区域淋巴结受累情况以及肿瘤大小有关(P<0.05),但与患者年龄、性别、吸烟史、分化程度及组织类型无关(P>0.05);鼻咽癌细胞与NP69相比较,miR 375的表达水平均显著低于NP69(P<0.05);miR 375过表达后C666 1细胞增殖、迁移显著低于慢性鼻咽炎-模拟物组(P<0.05),Nemo样激酶(Nemo like kinase,NLK)的表达下调。miR 375抑制后CNE1细胞增殖、迁移显著高于慢性鼻咽炎-抑制物组(P<0.05),miR 375对NLK具有直接靶向调控作用。结论miR 375在鼻咽癌中呈低表达,并与患者的临床分期、区域淋巴结受累情况以及肿瘤大小有关,其可能是通过下调靶基因NLK,从而抑制鼻咽癌的增殖及迁移。  相似文献   

6.
目前头颈部癌肿病人的预后大都根据临床特征、肿瘤组织病理分类和分级,以及肿瘤时期来估计,然而没有一种分类能满意地预测临床结果,因此必须结合诸多补充资料。肿瘤细胞的倍性和增殖特性是近年众多研究的课题。虽由于种种原因使该领域的进展受到限制。该作者采用活体澳脱氧尿核音(BUDR)结合流式细胞仪对52例头颈部肿瘤病人进行肿瘤细胞增殖特性的前瞻性研究。52例头颈部癌症病人,年龄49~84岁:38例喉表皮样癌,5例鼻咽癌,9例口腔表皮样痛。使用无放射活性和骨髓毒性的BUDR,取肿瘤标本活检前4~7/J‘时,在20分钟内,静脉输入…  相似文献   

7.
目的 研究鼻咽癌干细胞的增殖特征并初步探讨其分子机制。方法 采用无血清悬浮培养法从鼻咽癌细胞CNE2和5-8F获得鼻咽癌干细胞CNE2-SC、5-8F-SC,分别采用细胞存活率分析计数器、细胞平板克隆形成试验观察鼻咽癌干细胞的增殖特性和克隆形成能力,Western blot法检测细胞周期相关蛋白表达水平。结果 鼻咽癌干细胞比其来源的鼻咽癌细胞增殖速度显著降低,差异有统计学意义(P<0.05)。鼻咽癌干细胞克隆形成率显著高于其来源鼻咽癌细胞(P<0.01),但肿瘤干细胞克隆显著小于其来源细胞。与普通鼻咽癌细胞比较,鼻咽癌干细胞的细胞周期蛋白CylinD1、CylinD3及细胞周期调控蛋白CDK2、CDK4、CDK6的表达水平显著下调(P<0.01)。结论 鼻咽癌干细胞比其来源的鼻咽癌细胞生长增殖缓慢,可能与其细胞周期蛋白和周期蛋白依赖激酶表达水平下调有关。  相似文献   

8.
目的:以原发性鼻咽癌(NPC)患者为研究对象,检测鼻咽癌组织中P16/MTSI抑癌基因失活情况;研究鼻咽癌发生发展规律。方法:采用PCR、多重PCR、限制性内切酶解一PCR方法对34例鼻咽癌患者和34例非肿瘤(腺样体增殖及慢性炎症)患者,进行P基因纯会缺失和异常甲基化检测。结果:34例NPC患者纯缺失率为8.82%(3/34),异常甲基化率为38.24%(13/34),34例非肿瘤患者纯缺失未检出(0/34),异常甲基化率为8.82%(3/34)。结论:本研究鼻咽癌患者P16/MTSI抑癌基因总失活率为47.06%(16/34),表明P16基因失活在鼻咽癌患者中是较为常见的基因变化。鼻咽癌患者中甲基化异常是P16基因失活的另一重要途径,值得引起重视。  相似文献   

9.
陈辉  郑智勇 《耳鼻咽喉》1997,4(4):220-223
应用增殖细胞核抗原单克隆抗体PC10免疫组化法,DNA含量及细胞核形态图像分析法,对58例鼻咽癌进行检测。结果显示,三种方法的检测结果具有较好的一致性,其中肿瘤细胞的DNA指数和DNA倍体分布最具有价值。结果表明,检测肿瘤细胞增殖活性对于判断鼻咽癌恶性变及估计患者的预后具有重要意义。  相似文献   

10.
目的 研究鼻咽癌染色体脆性部位FRA3B区域的等位基因杂合性丢失(loss of heterozygosity,LOH)情况,并探讨LOH与鼻咽癌临床病理特征及EB病毒(Epstein-Barr virus,EBV)感染的关系。方法 选择FRA3B区域的8个微卫星多态标记对40例鼻咽癌组织进行LOH分析。结果 77.5%(31/40)的鼻咽癌在FRA3B脆性部位出现LOH,丢失频率较高的2个位点是D3S1300(55.6%)和D3S2757(50.0%),其共同缺失区为D3S4103-D3S4260。LOH与鼻咽癌的临床病理特征(肿瘤T分期、颈淋巴结转移、临床分期、肿瘤分化程度、肿瘤复发情况及EBV壳抗原IgA抗体滴度)相关,临床Ⅲ~Ⅳ期、低分化鳞癌、肿瘤复发和抗体滴度≥1:40者LOH频率明显高于临床Ⅰ~Ⅱ期、中分化鳞癌、无肿瘤复发及抗体滴度〈1:40者(P〈0.05)。结论 FRA3B脆性部位的LOH为鼻咽癌的频发事件,可能参与了鼻咽癌的发生发展,共同缺失区D3S4103-D3S4260可能是其优先作用的分子靶点。  相似文献   

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This article focuses on the change in olfaction and taste with aging. It discusses histopathology with an emphasis on age-related changes, causes of chemosensory dysfunction in the elderly, how to evaluate a patient with dysfunction, useful tests and imaging, clinical consequences of chemosensory impairments, and available treatment options.  相似文献   

13.
Head and neck cancer is frequent worldwide and oropharyngeal locations are presently sharply on the increase, in relation with an increasing incidence of oropharyngeal infection by oncogenic type-16 human papillomavirus (HPV). The clinical and biologic profile of these patients is distinct from that of other oropharyngeal carcinoma patients, with earlier onset, cystic cervical nodes and basaloid carcinoma histopathology. Detection of intratumoral viral DNA is essential to confirm the role of HPV, and E6/E7 mRNA expression is the most relevant indicator for stratification. Several methods can reveal intratumoral oncogenic HPV DNA, but PCR with hybridization is the most sensitive and most widely used. According to several reports, prognosis in terms of survival and locoregional control is better in HPV-positive oropharyngeal carcinoma than in oropharyngeal carcinoma associated with smoking and alcohol consumption. The future lies in vaccination, but further studies will determine whether the rate of oropharyngeal carcinoma falls in women vaccinated against cervical cancer.  相似文献   

14.
Tobacco and alcohol consumption are the main risk factors for head and neck cancers. Papillomavirus (HPV) infection was recently associated with the development of malignant tumors of the oropharynx, according to molecular and biological arguments. We describe the oncogenic mechanisms of HPV infections, the epidemiological and clinical aspects of associated head and neck cancers, their prognosis, and issues of specific therapeutic strategies.  相似文献   

15.
为了解紫杉醇治疗鼻咽癌、喉癌及其他头颈部肿瘤的疗效及作用机理,本文分析了近年来的文献27篇。紫杉醇通过稳定微管、阻断细胞的有丝分裂和增殖,从而显著地抑制肿瘤细胞的生长并促进细胞调亡,在头颈部肿瘤同期放化疗中能起到放疗增敏作用,单独或联合其他抗癌药物治疗亦有较佳的疗效。紫杉酵是一种具有良好抗癌活性的药物,随着研究的深入,将会在头颈部肿瘤的治疗中发挥更大的作用。  相似文献   

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Food selection plays a pivotal role in maintaining adequate nutrient intake, thus elucidating drivers of food choice is a meaningful strategy to maintain health and manage disease. Taste and smell are key determinants of food choice and warrant careful consideration. In this review, we first discuss how sensory stimulation influences food selection and metabolism. We then review the evidence regarding the relationship between taste and smell dysfunction and food preferences and selection, with attention given to contexts of certain chronic diseases. We conclude with brief recommendations for the management of chemosensory disorders. While sensory abilities influence food selection, the effect of taste and smell dysfunction on long-term consumption patterns and health status must be considered in light of environment, exposure, and culture.  相似文献   

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Laryngeal and hypopharyngeal carcinomas are common malignant tumors of the head and neck, and the incidence of both is increasing. Laryngopharyngeal reflux refers to the retrograde flow of gastric contents into the larynx, oropharynx, and/or nasopharynx. It remains controversial whether laryngopharyngeal reflux is a risk factor for laryngeal and hypopharyngeal cancers. The refluxing substances mainly include hydrochloric acid, pepsin, and occasionally bile acids and bile salts, as well as bacteria that colonize the gastrointestinal tract. Loss of epithelium in the mucous membrane of the larynx and hypopharynx is thought to be caused by pepsin. Here, we review the relationships between laryngopharyngeal reflux and both laryngeal and hypopharyngeal carcinomas, as well as the significance of pepsin, methods of clinical detection, and the mechanism of carcinogenesis.  相似文献   

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