p16及细胞核增殖抗原在良恶性成釉细胞瘤中的表达及意义

目的 :探讨 p16和细胞核增殖抗原 (PCNA)表达与良恶性成釉细胞瘤发生发展及与临床病理资料的关系。方法 :应用SP免疫组织化学方法检测了 17例恶性和 35例良性成釉细胞瘤p16和PCNA的表达 ,并以 10例正常口腔粘膜作对照研究。结果 :p16蛋白在正常口腔粘膜、良性及恶性成釉细胞瘤间均有显著性差异 (P <0 .0 1)。PC NA在恶性成釉细胞瘤的增殖指数 (18.99± 5 .99)显著高于良性成釉细胞瘤 (6 .5 9± 2 .97) (P <0 .0 1)。复发和未复发组p16或PCNA表达均具有显著性差异 (P <0 .0 5 )。p16和PCNA的表达呈显著的负相关关系 (P <0 .0 1)。结论 :P16在成釉细胞瘤发生发展中起重要作用 ;p16和PCNA对鉴别良恶性成釉细胞及判断预后具有参考意义。     

322例成釉细胞瘤临床病理研究

目的　研究成釉细胞瘤不同类型的临床病理特点及细胞增殖活性。方法　对 32 2例成釉细胞瘤进行回顾性研究 ,并行SP法PCNA检测和AgNOR定量分析。结果　 32 2例成釉细胞瘤分为一般型 (实性型或多囊型 )和低复发型。一般型复发率为 2 3.0 8% ,低复发型为 10 .72 % ,两者间有显著性差异 (P <0 .0 5 ) ;PCNA阳性细胞指数和AgNOR计数一般型分别为 (6 .6 7± 3.35 )和 (2 .6 7± 0 .2 8) ,低复发型分别为 (2 .49± 0 .6 7)和 (1.73±0 .2 6 ) ,两者有显著性差异 (P <0 .0 1)。结论　成釉细胞瘤为多形性肿瘤 ,两型临床病理和细胞增殖活性均不同     

恶性成釉细胞瘤AgNOR及PCNA表达的定量研究

目的　探讨AgNOR计数、形态分型及PCNA蛋白表达在恶性成釉细胞瘤中的意义。方法　应用免疫组化SP方法及AgNOR染色检测 17例恶性成釉细胞瘤组织中PCNA的表达及AgNOR计数和形态特征。结果　恶性成釉细胞瘤中AgNOR计数 (3 92± 0 87)及PCNA增殖指数 (18 78± 3 34)均显著高于良性成釉细胞瘤 (2 0 4± 0 5 8,6 86± 1 2 5 ;P <0 0 1)。恶性成釉细胞瘤中AgNOR形态主要为弥散型 ,而良性成釉细胞瘤中主要为单一型 ,两者均有显著性差异 (P <0 0 1)。结论　AgNOR计数和形态分型及PCNA增殖指数有助于恶性成釉细胞瘤的鉴别诊断。?     

恶性成釉细胞瘤细胞增殖活性和分化的研究

目的：研究恶性成釉细胞瘤细胞增殖活性和分化特点。方法：应用免疫组化SP方法检测17例恶性成釉细胞瘤组织中PCNA、Ki-67、CK19以及CK10和13蛋白的表达。结果：PCNA和Ki-67在恶性成釉细胞瘤中的增殖指数显著高于良性成釉细胞瘤（P＜0．05）。CK10和13在恶性成釉细胞瘤的阳性表达率显著低于良性成釉细胞瘤（P＜0．05）。而CK19在良恶性成釉细胞瘤的阳性表达率无显著性差异。结论：恶性成釉细胞瘤细胞增殖活性高于良性成釉细胞,CK10和13的阳性表达率有助于恶性成釉细胞瘤的诊断。     

成釉细胞瘤的体外培养和增殖动力学研究

目的 观察体外培养的成釉细胞瘤的生长特点及增殖活力。方法 对成釉细胞瘤细胞进行体外培养,并用流式细胞仪分析细胞的DNA含量和增殖活力。结果 成釉细胞瘤细胞在体外生存的条件较高,细胞在体外存活时间为 35～54天。培养的肿瘤细胞包含两种形态不同的细胞;肿瘤细胞生长缓慢,DI值为 0.97±0.03,为二倍体细胞;S期细胞比率（SPF）值为 7.77％±1.65％,增殖指数 PI值为 8.06±1.40,增殖活力在正常组织范围内;细胞凋亡受到抑制。结论 成釉细胞瘤是良性二倍体肿瘤,细胞增殖并不活跃,但细胞凋亡受到抑制。可能与其侵袭性有关。     

Ki-67抗原在实性成釉细胞瘤中的表达及其临床意义

目的 :探讨 2种常见类型实性成釉细胞瘤的细胞增殖性与其生物学行为的关系及其临床意义。方法 :应用LsAB免疫组织化学染色法对Ki 67抗原在 3 0例 2种常见实性成釉细胞瘤中的表达进行了研究 ,图像分析系统半定量分析其阳性染色指数。结果 :滤泡型成釉细胞瘤阳性染色指数 (4 .3 1± 2 .2 5 ) %明显高于丛状型成釉细胞瘤 (3 .76± 1.96) %。结论 :不同类型实性成釉细胞瘤的生物学行为存在差异 ,滤泡型成釉细胞瘤的细胞增殖能力较丛状型强 ,生物学行为上更具侵袭性 ,预后较差。     

成釉细胞瘤细胞计量病理学的研究

目的　用计量病理学方法探讨成釉细胞瘤上皮细胞的增殖特性。方法　利用多功能图像分析系统对 2 6例成釉细胞瘤的上皮细胞进行计量形态学和DNA含量分析 ,并用角化囊肿、根尖囊肿、含牙囊肿各 10例进行对比。结果　上皮细胞核DNA含量及形态参数比较显示 ;成釉细胞瘤明显大于含牙囊肿 (P <0 .0 5 ) ,与角化囊肿和根尖囊肿相近 ;滤泡型大于丛状型 (P <0 .0 5 ) ;外周细胞明显高于中央细胞 (P <0 .0 5 )。结论　成釉细胞瘤上皮细胞增殖活跃 ,其增殖特性符合临界性肿瘤的生物学特点     

颌骨成釉细胞瘤中细胞凋亡相关蛋白的表达

目的研究颌骨成釉细胞瘤中细胞凋亡相关蛋白的表达。方法采用免疫组化方法观察39例经典型成釉细胞瘤中凋亡相关蛋白Fas、Fas配体（Fas Ligand，FasL）、caspase-3和bcl-2及增殖细胞标记Ki67的表达，采用TUNEL法检测11例成釉细胞瘤中的凋亡细胞。结果39例成釉细胞瘤中分别有35（89．7％）、34（87．2％）及21（61．5％）例表达Fas、FasL和caspase-3，阳性染色主要分布于上皮岛中心呈鳞状化生和颗粒变性的细胞，TUNEL法标记的凋亡细胞也集中于这些区域。bcl-2和Ki67阳性染色则主要位于上皮岛周边的基底细胞。结论Fas／FasL介导的细胞凋亡机制可能在成釉细胞瘤中肿瘤细胞的分化、变性及被清除过程中发挥作用。     

表皮生长因子受体和生长因子受体C-erbB-2在成釉细胞瘤中的表达及意义

目的　探讨表皮生长因子受体EGFR和生长因子受体C erbB 2在成釉细胞瘤中的表达及意义。方法　利用流式细胞仪对培养的 5例成釉细胞瘤细胞进行间接免疫荧光染色检测。结果　 5例肿瘤细胞标本中 ,EFGR和C erbB 2的阳性率分别为 (42 2 0± 3 4 2 ) %和 (5 7 0 3± 5 0 6 ) %。结论　成釉细胞瘤细胞表面存在的生长因子受体 ,可能对肿瘤的增殖和局部侵袭性生长具有重要意义。     

舌鳞状细胞癌及癌周原位癌中心和边沿细胞增殖活性研究

目的　通过检测浸润癌及癌周原位癌中心区和边沿细胞增殖活性 ,分析舌鳞状细胞癌上皮内蔓延机制。方法　收治 16 9例舌鳞癌病例 ,伴有原位癌者共 16例。采用HE染色和免疫组化检测PCNA、Ki67蛋白及银染一步法检测NORs在舌鳞状细胞癌及癌周原位癌中心区和边沿中的表达。结果　正常上皮和原位癌之间 (P≤ 0 .0 1) ,原位癌和浸润癌之间 (P≤ 0 .0 1) ,浸润癌中心区和边沿之间 (P≤ 0 .0 1)细胞增殖活性有显著差异 ,而原位癌边沿和中心区之间无显著性差异 (P≥ 0 .0 5 )。结论　浸润癌边沿细胞具有较强的增殖活性 ,而原位癌中心区和边沿细胞增殖无明显差别。     

The relationship of proliferating cell density at the invasive tumour front with prognostic and risk factors in human oral squamous cell carcinoma

BACKGROUND: We hypothesise that the density of proliferating cells at the invasive tumour front (ITF) has a positive relationship with prognostic and risk factors in human oral squamous cell carcinoma (SCC). METHODS: Tissues from 47 human oral SCC specimens were collected and stained with a monoclonal antibody directed against the Ki-67 antigen using a horseradish peroxidase based two-step immunostaining method. Counting was performed on two parallel sections at the ITF using an image analyser. The Ki-67 labelling index (LI) was determined by measuring the number of nuclei/mm(2) of epithelium. RESULTS: Our results show that the density of proliferating cells is related to clinical staging, with advanced stage of disease having a significantly higher Ki-67 LI compared with early stage of disease (2111 +/- 905 vs. 1908 +/- 913; P = 0.03). Importantly, this study shows that tumours that have metastasised have a significantly higher Ki-67 LI than tumours where distant metastasis was not detected (3257 +/- 650 vs. 1966 +/- 881; P < 0.0001). CONCLUSIONS: Cell proliferation, as measured by the Ki-67 LI at the ITF, has a positive relationship with clinical staging, tumour thickness, smoking status of the patient and alcohol consumption. Further, we suggest that a multicenter study with a large cohort of patients is indicated to fully elucidate whether cell proliferation at the ITF is directly related to patient survival.     

Analysis of the Ki-67 antigen at the invasive tumour front of human oral squamous cell carcinoma

BACKGROUND: It is hypothesised that cell proliferation, as measured by the Ki-67 labelling index (LI) at the invasive tumour front (ITF) was directly related to the histological grade in human oral squamous cell carcinomas (SCCs). METHODS: Tissues from 42 human oral SCCs were collected and stained with an antibody directed against the Ki-67 antigen using an advanced polymer staining system. Quantitation of the immunopositive cells was performed on two parallel sections at the invasive tumour front (ITF), using an image analyser. The Ki-67 LI was expressed as the number of positive nuclei/mm2 of epithelium. The control tissue used was normal epithelium at the excision margin. RESULTS: The mean Ki-67 LI for oral SCCs at the ITF was significantly greater than that for the excision margin tissue (P < 0.0001). There was a positive association between increasing Ki-67 LI and increasing Broders' grade (P < 0.05), with a well-differentiated tumour having the lowest mean Ki-67 LI (1549 +/- 806) and a poorly differentiated tumour having the highest value (2232 +/- 771). A similar trend was observed between the mean Ki-67 LI and Bryne's multifactorial grading system. CONCLUSIONS: It was concluded from this study that cell proliferation (as measured by the Ki-67 antigen) at the ITF had a strong positive relationship with histological grading in human oral SCC.     

成釉细胞瘤中Ki-67的表达及其临床意义

目的　检测Ki-67抗原在不同组织类型成釉细胞瘤中的表达情况,以探讨不同组织类型成釉细胞瘤的细胞增殖能力差异及其相应的临床意义。方法　采用LsAB免疫组织化学方法,对70例成釉细胞瘤进行染色, 并采用Sopt及IPP图像分析系统半定量分析Ki-67阳性染色指数。结果　恶性成釉细胞瘤的阳性染色指数最高 14·72%±2·87%,其次为实性成釉细胞瘤,其中以滤泡型4·42%±1·05%高于丛状型3·64%±1·23%,单囊型最低 2·21%±1·09%。结论　Ki-67所反映的不同组织类型成釉细胞瘤的细胞增殖能力的差异,可能与其术后复发率的高低有关。     

牙源性钙化囊肿组织病理及细胞增殖活性的研究

目的研究牙源性钙化囊肿（ｃａｌｃｉｆｙｉｎｇｏｄｏｎｔｏｇｅｎｉｃｃｙｓｔ，ＣＯＣ）的组织病理、临床特征及其细胞增殖活性。方法对２５例ＣＯＣ的标本进行ＨＥ染色和组织学观察，增殖细胞核抗原（ｐｒｏｌｉｆｅｒａｔｉｎｇｃｅｌｎｕｃｌｅａｒａｎｔｉｇｅｎ，ＰＣＮＡ）采用免疫组织化学法（ＡＢＣ法）和银染核仁形成区（ａｒｇｙｒｏｐｈｉｌｓｔａｉｎｉｎｇｎｕｃｌｅｏｌａｒｏｒｇａｎｉｚｅｒｒｅｇｉｏｎ，ＡｇＮＯＲ）计数。结果２５例ＣＯＣ中，１３例为囊肿型，８例为良性肿瘤型，４例为恶性型，即牙源性影细胞癌。不同类型的ＣＯＣ中，细胞增殖活性不同。牙源性影细胞癌内ＰＣＮＡ的阳性表达率和ＡｇＮＯＲ均数都显著高于其他类型的ＣＯＣ（Ｐ＜０．０１）。结论ＣＯＣ在结构和生物学行为上均具有较大的变异性。ＰＣＮＡ的阳性表达率及ＡｇＮＯＲ计数有助于各型ＣＯＣ的诊断     

A immunohistochemical study of the peripheral ameloblastoma

AIM: Peripheral ameloblastoma (PA) is a rare variant of ameloblastoma occurring in the extraosseous region. With regard to the histogenesis of the tumor, two major sources of origin are considered: odontogenic epithelial remnants and the gingival epithelium. In this study, we examined the immunohistochemical profiles of cytokeratins (CKs) and Ki-67 labeling index (LI) of PAs, and discuss the histogenesis and the biologic behavior of the PA. MATERIALS AND METHODS: Eight cases of PA were retrieved from the pathology files of 212 cases of ameloblastoma that had been registered at our hospital. Immunohistochemical staining was performed in seven cases using monoclonal antibodies of six CKs (7, 8, 13, 14, 18, and 19) and Ki-67. RESULTS: All cases of PA expressed CK13, 14, and 19. CK18 was positive staining in six cases, and CK8 in five cases. This staining pattern was similar to that in intraosseous ameloblastomas (IAs). The mean of Ki-67 LI of PAs (1.91%) was significantly lower than that of IAs (4.82%) (P = 0.002). CONCLUSION: We consider that the PA originates from odontogenic epithelial remnants rather than from the gingival epithelium, and the Ki-67 LI of the tumor is a good prognostic indicator.     

增殖细胞核抗原和Ki-67抗原在黏液表皮样癌中的表达

目的:检测细胞增殖核抗原(PCNA)和Ki-67抗原在黏液表皮样癌中的表达,探讨其表达量与粘液表皮样癌分级的相关性及意义。方法:对17例黏液表皮样癌的临床病理特点进行回顾性分析,采用SABC和LSAB免疫组化法分别检测PCNA和Ki-67在17例黏液表皮样癌的表达和分布。结果:17例黏液表皮样癌中,高分化型11例(其中1例转移)。低分化型6例(其中4例转移)。PCNA及Ki-67的增殖指数(PI值)在黏液表皮样癌中,低分化型明显高于高分化型(P<0.001)。在发生转移的黏液表皮样癌组中,PCNA及Ki-67的表达水平均明显高于无转移组。结论:黏液表皮样癌中PCNA和Ki-67的表达水平与细胞分化有关,其PI值可作为组织学分级的重要参数。PCNA和Ki-67的高表达预示着黏液表皮样癌预后的不良。     

增殖细胞核抗原和Ki-67抗原在涎腺癌中的表达

目的:探讨细胞增殖核抗原和Ki-67抗原在不同类型涎腺癌中的表达及意义。方法:采用SABC和LSAB免疫组化法分别检测PCNA和Ki-67在17例粘液表皮样癌、12例腺样囊性癌、9例恶性多形性腺瘤中的表达和分布。结果:1)PCNA及Ki-67的增殖指数即PI值在粘液表皮样癌和腺样囊性癌的不同分级中表达不同,且有统计学意义(P<0.005)。2)恶性多形性腺瘤PCNA及Ki-67的PI值较高,与腺样囊性癌及粘液表皮样癌相比差异有统计学意义(P<0.001)。3)PCNA及Ki-67的表达水平与涎腺癌的生物学行为(复发和转移)明显相关。结论:涎腺癌中PCNA和Ki-67的表达水平与细胞分化有关,其PI值可作为粘液表皮样癌和腺样囊性癌的组织学分级的重要参数,也是诊断恶性多形性腺瘤的重要指标。PCNA和Ki-67的高表达预示着涎腺癌预后的不良。     

Proliferating cell nuclear antigen and Ki67 immunoreactivity in ameloblastomas

OBJECTIVE: This study used proliferating cell nuclear antigen (PCNA) and Ki67 to evaluate and compare the in situ proliferative activity of (1) solid and multicystic and (2) unicystic ameloblastomas in an attempt to provide a scientific basis for any differences in biologic behavior that exists between these 2 groups of lesions. STUDY DESIGN: Twenty archival tissue sections, 10 of primary unicystic and 10 of solid and multicystic ameloblastomas, were immunohistochemically stained with PCNA and Ki67 antisera. Immunoreactivity was evaluated by the counting of cells, and the data obtained were statistically analyzed. RESULTS: The results showed that cellular proliferative activity varied within the ameloblastoma types. The unicystic ameloblastomas showed statistically significantly higher PCNA and Ki67 labeling indices than the solid and multicystic variant. CONCLUSION: There appears, therefore, to be no correlation between proliferative activity as shown by these proteins and reported biologic behavior.