上颌窦鳞癌两种癌基因及增殖细胞核抗原的表达及意义

目的 检测上颌窦鳞癌、上颌窦内翻性乳头状瘤及上颌窦炎性粘膜中ｒａｓ、ｐ５３及增殖细胞核抗原的表达情况，并分析其表达与上颌窦鳞癌临床病理特性和预后的关系。方法 应用免疫组织和化学方法检测４０例上颌窦鳞癌、２０例上颌窦内翻必 状瘤、１０例上颌窦炎性粘膜中ｒａｓ、ｐ５３、ＰＣＮＡ的表达情况。结果 ｒａｓ基因表达与上颌窦鳞癌分化程度有关，其表达多见于高分化鳞癌中；Ｐ５３基因表达只出现在上颌窦鳞癌中，在上颌     

上颌窦鳞状细胞癌细胞周期调控因子表达及意义

目的　检测上颌窦鳞癌、上颌窦内翻性乳头状瘤及上颌窦炎性黏膜中细胞周期蛋白D1(cyclinD1)、细胞周期蛋白E(cyclinE)、P2 1WAF1/CIP1和P2 7KIP1的表达情况 ,分析其表达与上颌窦鳞癌病理分化程度的关系。方法　应用免疫组织化学方法检测 5 0例上颌窦鳞癌、2 0例上颌窦内翻性乳头状瘤、10例上颌窦炎性黏膜中cyclinD1、cyclinE、P2 1WAF1/CIP1和P2 7KIP1的表达情况。结果　①在上颌窦鳞癌、上颌窦内翻性乳头状瘤及上颌窦炎性黏膜中 ,cyclinD1阳性表达率分别为 10 0 %、2 5 0 %、4 8 0 %(P <0 0 5 ) ;cyclinE阳性表达率分别为 2 0 0 %、35 0 %、5 8 0 % (P <0 0 5 ) ;P2 1WAF1/CIP1阳性表达率分别为 80 0 %、6 5 0 %、4 0 0 % (P <0 0 5 ) ;P2 7KIP1阳性表达率分别为 70 0 %、75 0 %、4 0 0 % (P <0 0 5 ) ;②cyclinD1、cyclinE、P2 1WAF1/CIP1和P2 7KIP1阳性表达率与上颌窦鳞癌的性别、T分型差异无显著性 (P >0 0 5 ) ;③P2 1WAF1/CIP1在高、中和低分化的上颌窦鳞癌中阳性表达分别为 11/15、11/19、4 /16 (P <0 0 5 ) ;cyclinD1、cyclinE和P2 7KIP1在高、中和低分化的上颌窦鳞癌中阳性表达率组间比较差异无显著性 (P值均 >0 0 5 )。结论　①在上颌窦炎性黏膜、上颌窦内翻性乳头状瘤及上     

p27蛋白和增殖细胞核抗原在上颌窦鳞癌中的表达

目的探讨p27蛋白和增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)在上颌窦鳞癌中的表达及其与上颌窦鳞癌发生发展的关系.方法应用免疫组化SABC法检测35例上颌窦鳞癌和15例鼻腔鼻窦内翻性乳头状瘤的p27蛋白和PCNA表达.结果p27蛋白及PCNA染色阳性细胞均为细胞核着色.其中上颌窦鳞癌的p27蛋白阳性率为25.71%,鼻腔鼻窦内翻性乳头状瘤的阳性率为73.3%.二者差异有高度显著性(P＜0.01).但鳞癌各组间经统计学检验差异无显著性.上颌窦鳞癌PCNA指数为86.94±9.83,鼻腔鼻窦内翻性乳头状瘤的PCNA指数为46.14±2.66,二者差异有高度显著性(P＜0.001).随上颌窦鳞癌分化程度的降低,PCNA指数增加,不同分化间PCNA指数差异有显著性(P＜0.05).结论检测上颌窦鳞癌组织中p27蛋白和PCNA的表达能够快速、准确地反映肿瘤细胞的增殖状态和评价预后,对判定上颌窦鳞癌的恶性程度及指导治疗有一定的意义.     

喉鳞癌中增殖细胞核抗原和p53蛋白表达的临床意义及其相互关系

本文以ＬＳＡＢ免疫组化方法，用单克隆抗体ＰＣ１０和ＤＯ－１对３０例喉鳞癌及１０例对照组（声带息肉）的增殖细胞核抗原（ＰＣＮＡ）与ｐ５３蛋白表达进行研究，探讨其生物学意义。结果发现：１）喉鳞癌组织ＰＣＮＡ阳性表达率为１００％（ＰＣＮＡ－ＬＩｓ１６％～９２％），强阳性率为３６７％（１１／３０），对照组６例阴性，４例弱阳性表达（ＰＣＮＡ－ＬＩｓ＜１０％），试验组阳性表达率及表达程度明显高于对照组（Ｐ＜００５）。２）ｐ５３蛋白在喉鳞癌中阳性表达率为６６７％，对照组全部阴性，有显著差异（Ｐ＜００５）。３）在喉鳞癌组织中，ＰＣＮＡ和ｐ５３蛋白表达与临床分型、Ｔ分期及病理分化程度无显著关系（Ｐ＞００５），与淋巴转移及术后生存率关系密切（Ｐ＜００５）。４）ＰＣＮＡ与ｐ５３蛋白表达正相关。提示：１）喉鳞癌的增殖活性显著增强，ｐ５３基因突变与喉鳞癌的发生和发展有关。２）检测ＰＣＮＡ和ｐ５３蛋白有助于喉鳞癌的早期诊断和鉴别诊断，帮助治疗决策及判断预后。３）ｐ５３对ＰＣＮＡ有调节作用，为研究肿瘤的发生机理和寻找防治对策提供了新的理论依据。     

鼻内翻性乳头状瘤及其癌变与p53蛋白异常表达

目的：探讨鼻内翻性乳头状瘤及其癌变与ｐ５３基因的关系。方法：采用免疫组化方法（ＡＢＣ法）对３６例鼻内翻性乳头状瘤（ＩＰ）组织和１６例鼻内翻性乳头状瘤癌变（ＩＰ＋ＳＣＣ）组织进行了ｐ５３蛋白检测。结果：３６例ＩＰ均为ｐ５３蛋白阴性，而在１６例ＩＰ＋ＳＣＣ组织中有５例为ｐ５３蛋白阳性，阳性率为３１．３％（５／１６），经统计学处理，二者差异显著（Ｐ〈０．００１）。结论：ｐ５３蛋白异常表达可能与ＩＰ的发生     

喉癌P53基因表达与放疗效果的关系

应用抗ｐ５３基因单克隆抗体，以免疫组织化学ＤＡＣＯＣＳＡＳｙｓｔｅｍ法染色技术，对７３例喉鳞癌组织标本进行检测。结果显示，Ｐ５３基因表达分为强度，中度表达及阴性表达。因此认为，可以把ｐ５３基因表达作为判定喉癌放疗预后及指导临床治疗的可靠指标。     

喉鳞癌中增殖细胞核抗原和p53蛋白表达的临床意义及其…

本文以ＬＳＡＢ免疫组化方法，用单克隆抗体ＰＣ１０和ＤＯ－１对３０例喉鳞癌及１０例对照组（声带息肉）的增殖细胞核抗原（ＰＣＮＡ）与ｐ５３蛋白表达进行研究，探讨其生物学意义。结果表明；１）喉鳞癌组织ＰＣＮＡ阳性表达率为１００％（ＰＣＮＡ－Ｌｌｓ１６％～９２％），强阳性率为３６．７％（１１／３０），对照组６例阴性，４例弱阳性表达（ＰＣＮＡ－ＬＩｓ〈１０％），试验组阳性表达率及表达程度明显高于对照组（Ｐ〉     

上颌窦鳞癌myc,c—erbB—2,EGFR的表达及意义

目的：检测上颌窦鳞癌中癌基因ｍｙｃ、ｃ－ｅｒｂＢ－２、ＥＧＦＲ的表达情况，并分析ｍｙｃ、ｃ－ｅｒｂＢ－２、ＥＧＦＲ的蛋白表达与上颌窦鳞癌临床分期、病理分化及预后的关系。方法：应用免疫组织化学ＡＢＣ法。结果：上颌窦鳞癌中ｍｙｃ、ｃ－ｅｒｂＢ－２、ＥＧＦＲ表达的阳性率分别是６０．０％、４２．５％、４７．５％。ｍｙｃ蛋白高表达者（阳性细胞〉３０％）上颌窦鳞癌３年生存率明显低于ｍｙｃ蛋白低表达（阳性细胞〈     

p27蛋白和增殖细胞核抗原在上颌窦鳞癌中的表达

目的:探讨p27蛋白和增殖细胞核抗原(proliferating cell nuclear antigen,PCNA)在上颌窦鳞癌中的表达及其与上颌窦鳞癌发生发展的关系。方法:应用免疫组化SABC法检测35例上颌窦鳞癌和15例鼻腔鼻窦内翻性乳头状瘤的p27蛋白和PCNA表达。结果:p27蛋白及 PCNA染色阳性细胞均为细胞核着色。其中上颌窦鳞癌的p27蛋白阳性率为25．71％,鼻腔鼻窦内翻性乳头状瘤的阳性率为73．3％。二者差异有高度显著性(P<0．01)。但鳞癌各组间经统计学检验差异无     

鼻内翻性乳头状瘤组织中p53和人乳头状瘤病毒检测

鼻内翻性乳头状瘤组织中ｐ５３和人乳头状瘤病毒检测王德辉陈茂国李玉茹肖立峰孙克敏我们对内翻性乳头状瘤及其癌变组织进行突变型ｐ５３蛋白和ＨＰＶ相关ＤＮＡ序列检测。探讨ｐ５３蛋白异常表达和ＨＰＶ感染与内翻性乳头状瘤的发生及癌变的关系。一、材料与方法１．ｐ５...     

Loss of p21 expression is associated with p53 mutations and increased cell proliferation and p27 expression is associated with apoptosis in maxillary sinus squamous cell carcinoma

CONCLUSIONS: Loss of p21 expression dependent on the p53 mutation may be associated with higher tumor cell proliferation, and low p27 expression may be associated with decreased spontaneous apoptosis, resulting in poorer prognosis in patients with maxillary sinus squamous cell carcinoma (SCC). OBJECTIVE: We have previously reported that p53 mutations and decreased spontaneous apoptosis were associated with poor prognosis in maxillary sinus SCC. However, whether p21 and p27 expression and cell proliferation correlate with either p53 status, spontaneous apoptosis or prognosis in maxillary sinus SCC has not been evaluated. MATERIAL AND METHODS: Seventy patients with maxillary sinus SCC were analyzed. Tumor biopsy specimens were examined for p21 and p27 expression using an immunohistological method. The percentage of proliferating cells labeled by anti-Ki-67 mAb was expressed as the Ki-67 index (KI). RESULTS: Loss of p21 expression correlated with p53 mutations (p=0.0072). The KIs in patients without p21 expression and with p53 mutations were significantly higher than those in patients with p21 expression (p=0.0119) and those without p53 mutations (p=0.0048). Patients with p27 expression showed a significantly higher apoptotic index than those without (p=0.0012). Kaplan-Meier analysis showed that p21 expression was closely associated with prolonged disease-free survival in the group with a normal p53 status (p=0.0472). Multivariate analysis identified high KI as an independent prognostic marker (p=0.047).     

Loss of p21 expression is associated with p53 mutations and increased cell proliferation and p27 expression is associated with apoptosis in maxillary sinus squamous cell carcinoma

Conclusions. Loss of p21 expression dependent on the p53 mutation may be associated with higher tumor cell proliferation, and low p27 expression may be associated with decreased spontaneous apoptosis, resulting in poorer prognosis in patients with maxillary sinus squamous cell carcinoma (SCC). Objective. We have previously reported that p53 mutations and decreased spontaneous apoptosis were associated with poor prognosis in maxillary sinus SCC. However, whether p21 and p27 expression and cell proliferation correlate with either p53 status, spontaneous apoptosis or prognosis in maxillary sinus SCC has not been evaluated. Material and methods. Seventy patients with maxillary sinus SCC were analyzed. Tumor biopsy specimens were examined for p21 and p27 expression using an immunohistological method. The percentage of proliferating cells labeled by anti-Ki-67 mAb was expressed as the Ki-67 index (KI). Results. Loss of p21 expression correlated with p53 mutations (p=0.0072). The KIs in patients without p21 expression and with p53 mutations were significantly higher than those in patients with p21 expression (p=0.0119) and those without p53 mutations (p=0.0048). Patients with p27 expression showed a significantly higher apoptotic index than those without (p=0.0012). Kaplan–Meier analysis showed that p21 expression was closely associated with prolonged disease-free survival in the group with a normal p53 status (p=0.0472). Multivariate analysis identified high KI as an independent prognostic marker (p=0.047).     

Characteristics of nasal inverted papilloma and its malignant transformation: a study of cell proliferation and programmed cell death

BACKGROUND: In nasal inverted papilloma (IP) and its malignant transformation process, abnormal cell growth has been regarded as a altered proliferation of the epithelial cells, while the role of programmed cell death in this process remains to be determined. METHODS: An apoptotic index was calculated, and the proliferation ability by using Ki67 as a marker was evaluated in the study subjects, which consisted of 15 cases of nasal chronic sinusitis, 23 cases of nasal IP, 9 cases of nasal IP with dysplasia, 8 cases of nasal IP with squamous cell carcinoma (SCC), and 21 cases of primary SCC. In addition, expressions of apoptosis-related molecules p53, Bcl-2, Bax, and Fas were investigated also. RESULTS: The result showed that the Ki67 index increased in IP and IP with dysplasia. The Ki67 value was further enhanced in SCC within IP and primary SCC. The apoptotic index was low in IP with dysplasia, IP with SCC, and primary SCC. Concerning the expression of apoptosis-related proteins, p53 protein accumulated in IP with dysplasia, IP with SCC, and primary SCC. The p53 overexpression was directly correlated with the Ki67 index in IP and primary SCC diseases. No remarkable differences were found regarding expression of Bcl-2 and Fas productions among these diseases, and Bax protein was decreased only in primary SCC. CONCLUSION: We concluded that inhibition of apoptosis could be an early sign of IP undergoing malignant transformation. A high proliferative rate was a characteristic of IP-associated malignant diseases.     

Appearance of Bax Protein After Preoperative Chemoradiotherapy is a Prognostic Factor in Maxillary Cancer

The prognosis for maxillary squamous cell carcinoma (SCC) remains poor, despite advances in combination therapy. Combined treatment with anticancer drugs and radiation therapy is aimed at inducing apoptosis. As apoptosis is regulated by several proteins, we investigated the expression of p53, Bax and Bcl-2 in maxillary SCC before treatment and after preoperative chemoradiotherapy using an immunohistochemical approach. Furthermore, apoptotic cells were visualized using an in situ apoptosis detection kit and the apoptosis index (AI) was defined as the number of positive cancer cells per 1000 cancer cells. Expression of p53 and Bcl-2 and the AI in 23 maxillary SCCs were not associated with tumor size, lymph node metastasis, clinical stage, frequency of recurrence or 5-year survival rate either before treatment or after preoperative chemoradiotherapy. Bax expression before treatment was not correlated with any clinicopathological factors before treatment. However, no patients in the Bax-positive group (11/22 cases) after preoperative chemoradiotherapy had recurrence of maxillary SCC and all were alive after 5 years, while the 5-year survival rate was 34.1% in Bax-negative patients. These results suggest that the appearance of the Bax protein after preoperative chemoradiotherapy is a significant prognostic marker for maxillary SCC.     

Appearance of bax protein after preoperative chemoradiotherapy is a prognostic factor in maxillary cancer

The prognosis for maxillary squamous cell carcinoma (SCC) remains poor, despite advances in combination therapy. Combined treatment with anticancer drugs and radiation therapy is aimed at inducing apoptosis. As apoptosis is regulated by several proteins, we investigated the expression of p53, Bax and Bcl-2 in maxillary SCC before treatment and after preoperative chemoradiotherapy using an immunohistochemical approach. Furthermore, apoptotic cells were visualized using an in situ apoptosis detection kit and the apoptosis index (AI) was defined as the number of positive cancer cells per 1,000 cancer cells. Expression of p53 and Bcl-2 and the Al in 23 maxillary SCCs were not associated with tumor size, lymph node metastasis, clinical stage, frequency of recurrence or 5-year survival rate either before treatment or after preoperative chemoradiotherapy. Bax expression before treatment was not correlated with any clinicopathological factors before treatment. However, no patients in the Bax-positive group (11/22 cases) after preoperative chemoradiotherapy had recurrence of maxillary SCC and all were alive after 5 years, while the 5-year survival rate was 34.1% in Bax-negative patients. These results suggest that the appearance of the Bax protein after preoperative chemoradiotherapy is a significant prognostic marker for maxillary SCC.     

鼻腔-鼻窦内翻性乳头状瘤组织PCNA、bcl-2和p53的表达活性观察

目的分别检测鼻腔/鼻窦内翻性乳头状瘤（nasal invered papilloma,IP）、内翻性乳头状瘤伴不典型增生（IP with dysplasia,ID）和内翻性乳头状瘤伴恶变组织（IP with squamous cell carcinoma,SCC）中的增殖细胞核抗原、bcl-2和p53表达活性,探讨内翻性乳头状瘤恶变的可能机制。方法内翻性乳头状瘤31例、内翻性乳头状瘤伴不典型增生10例、内翻性乳头状瘤恶变5例,取活检组织,应用免疫组织化学方法分别检测增殖细胞核抗原、bcl-2和p53的表达活性,分析其病理意义。结果内翻性乳头状瘤、内翻性乳头状瘤伴不典型增生组织p53表达分别为0%、40.0%,PCNA的表达分别为25.81%、60.0%,bcl-2的表达分别为29.03%、70.0%。二者差异的组间比较以及内翻性乳头状瘤与SCC的组间比较差异有统计学意义,而内翻性乳头状瘤伴不典型增生与SCC的组间比较差异无统计学意义。结论鼻腔/鼻窦内翻性乳头状瘤的恶变,可能是其细胞增殖活性升高与凋亡活性抑制共同作用的结果。     

表皮生长因子受体和C-erbB2及Ki-67在鼻部鳞状细胞癌中的表达及意义

目的:探讨表皮生长因子受体(EGFR)、C-erbB2及Ki-67在鼻部鳞状细胞癌(SCC)中的蛋白表达及其在该病发生、发展中的意义.方法:采用免疫组织化学SP法检测31例鼻腔鼻窦SCC、12例鼻息肉(NP)和17例鼻内翻性乳头状瘤(IP)组织中EGFR、C-erbB2和Ki-67蛋白的表达.结果:EGFR与Ki-67在鼻腔鼻窦SCC中的阳性表达率明显高于IP(P＜0.05,P＜0.01)与NP组织(P＜0.05,P＜0.01),C-erbB2在SCC中的表达明显高于NP组织(P＜0.05),3种蛋白均与SCC组织分级无关.结论:EGFR的过度表达可能是鼻部SCC发病的早期表现,C-erbB2的过度表达可能与鼻部SCC的发展及病理分级有关,Ki-67的免疫组织化学表达特征可作为反映鼻腔鼻窦肿瘤生物学行为的客观指标,但3种生物标志物均不能作为评价SCC病理分级的检测指标.     

Desmoglein 3 is overexpressed in inverted papilloma and squamous cell carcinoma of sinonasal cavity

Objectives/Hypothesis:

We sought to investigate the role of desmoglein 3 in pathogenesis of sinonasal inverted papilloma (IP) and its malignant transformation.

Methods:

Fifteen subjects with sinonasal IP and 15 subjects of normal sphenoid sinus mucosa were enrolled. Each specimen was divided into two portions: one for mRNA expression analysis by real‐time polymerase chain reaction, and the other for detection of targeted proteins by immunohistochemistry analysis. In addition, another 10 cases of IP with squamous cell carcinoma (SCC) were added for immunohistochemistry analysis.

Results:

The mRNA expression level of desmoglein 3 was significantly higher in IP tissues than in the normal sinus mucosa (P < .001). In immunohistochemistry study, desmoglein 3 was detected in plasma membrane areas of IP and IP with SCC tissues, but no obvious expression was found in normal sinus mucosa (total score; both P < .001). Positive desmoglein 3 staining was strongly present in nearly all malignant transformation areas of IP with SCC cases (90%), but only in scattered areas of some cases of IP (53%) (total score; P < .001).

Conclusions:

Desmoglein 3 was overexpressed in IP and IP with SCC, and the overexpression was correlated with malignant transformation of IP. It may provide valuable insight into the pathobiology of this disease, and can potentially provide a venue to predict malignant transformation in sinonasal IP. Laryngoscope, 2010