食管癌前病变及原位癌组织中Ki67、p53、iNOS的异常表达

目的研究食管癌高发区癌前病变及癌活检组织标本中Ki67、p53蛋白的异常表达,探讨其与食管癌变的关系及作为早期癌变生物学标志物的可能性。方法对来自食管癌高发区河北磁县的正常食管黏膜组织和轻度、中度、重度不典型增生上皮以及原位癌活检组织共366例,应用免疫组化技术对食管癌变过程中Ki67、p53蛋白的异常表达进行研究。结果在正常黏膜、轻度、中度、重度不典型增生及原位癌组织中,Ki67异常表达检出率分别为0(0/25)、40.5%(30/74)、61.3%(65/106)、76.5%(39/51)和90.0%(72/80),其中异常表达程度在中度以上者分别占0(0/25)、2.7%(2/74)、11.2%(12/106)、41.2%(21/51)和58.8%(47/80);p53蛋白异常表达的阳性率分别为4%(1/25)、39.1%(27/69)、57.5%(61/106)、52.9%(27/51)和67.9%(53/78),其中异常表达程度在中度以上者分别占0(0/25)、10.1%(7/69)、24.5%(26/106)、39.2%(20/51)和48.7%(38/78)。p53蛋白及Ki67在正常黏膜中的表达,与不典型增生总体及原位癌组织的差异均有显著性(P＜0.001)。等级相关分析结果显示,p53、Ki67表达异常与组织学分级均显著相关（相关系数r分别为0.3597和0.5837,P值均＜0.001),而且p53蛋白与Ki67表达之间也具有显著相关性（r=0.5432,P＜0.001）。结论Ki67、p53蛋白异常表达与食管癌癌变过程显著相关,p53基因表达异常及细胞增殖异常与食管上皮的早期癌变有关。p53及Ki67表达改变的时相分布,有可能成为在食管癌前人群中确立高危个体和选择重点化学预防个体的分子生物学标记。p53改变可促使上皮细胞增殖。     

端粒酶hTERT mRNA表达在乳腺癌进展中的意义及其与p53的相关性

目的 探讨端粒酶hTERT mRNA表达在人乳腺癌发生、发展中的意义,观察肿瘤抑制基因p53与hTERT mRNA表达的关系。方法 收集浸润性导管癌标本25例,导管原位癌标本18例,导管上皮不典型增生标本20例,导管上皮单纯性增生标本7例,癌旁正常乳腺组织标本12例。用原位杂交法检测hTERT mRNA表达,并用免疫组化方法检测乳腺导管癌的p53蛋白表达。结果 hTERT mRNA在癌旁正常乳腺组织、乳腺导管单纯性增生中未见表达;在导管不典型增生、导管原位癌、浸润性导管癌中的阳性率分别为25．0％、83．3％和88．0％。导管原位癌、浸润性导管癌组织hTERT mRNA表达明显高于癌旁正常乳腺组织、乳腺导管单纯性增生和导管不典型增生组织（P〈0．05）。hTERT mRNA表达与浸润性导管癌肿块大小及淋巴结转移与否无关（P〉0．05）。43例乳腺导管癌中,hTERT mRNA表达与p53蛋白表达呈正相关（r=0．5540,P〈0．01）。结论 端粒酶hTERT mRNA表达可能在乳腺导管癌的组织发生中起关键作用,半定量原位检测hTERT mRNA表达,可为导管上皮不典型增生与导管原位癌的鉴别诊断提供帮助。p53突变可能与乳腺导管癌hTERT基因转 录激活有关。     

GST-π在不同食管病变组织中的表达及意义

目的探讨GST-π在不同食管病变组织中的表达及意义。方法应用免疫组织化学S-P法检测50例食管鳞癌及其周围正常食管黏膜、20例食管黏膜轻度不典型增生、20例食管黏膜重度不典型增生组织中GST-π的表达。结果在正常黏膜、轻度不典型增生、重度不典型增生及鳞状细胞癌组织中GST-π阳性率分别为82％、75％、60％、52％。癌组织及重度不典型增生组织中GST-π的表达明显低于正常黏膜及轻度不典型增生组织中的表达（P〈0．05）,但正常食管黏膜与轻度不典型增生之间及重度不典型增生和癌组织之间GST-π的表达差异无统计学意义（P〉0．05）。结论GST-π与食管癌的发生密切相关。     

食管鳞状细胞癌及癌前病变组织中p16基因甲基化的研究

目的：探讨食管鳞状细胞癌及癌前病变纽织p16基因CpG岛的甲基化情况．及其在食管癌发生和早期诊断中的价值。方法：采用MSP方法，对食管癌前病变不同阶段、鳞状细胞原位癌和浸润癌的病变组织进行了甲基化检测．并与其相应的正常组织和慢性食菅炎组织的甲基化情况进行对比分析。结果：轻、中、重度不典型增生、鳞状细胞原位癌和浸润癌的甲基化频率分别为22．73％(5/27)、46．15％(6/13)、77．78％(7/9)、78．57％(11/14)和64．86％(24/37)。67例正常对照组织中3例(4．48％)p16基因甲基化，与病变组织相比，差异有统计学意义，P=0．000。10例慢性食管炎组织中1例(10％)p16基因甲基化。结论：p16基因甲基化可能是食管癌发生的最早期事件之一。     

RAR-β2 基因在乳腺肿瘤组织中的表达及意义*

目的:检测视黄酸受体β 2（RAR-β 2）基因在不同乳腺肿瘤组织中的表达,探讨RAR-β 2 基因与乳腺肿瘤的关系,分析其在乳腺癌发生、发展中的作用。方法:免疫组织化学法检测乳腺浸润性癌、导管上皮重度不典型增生、腺纤维瘤各40例及20例正常乳腺组织中RAR-β 2 的表达情况。RT-PCR 法检测乳腺浸润性癌、导管上皮重度不典型增生、腺纤维瘤及正常乳腺组织各20例RAR-β 2 的表达水平。结果:免疫组化结果显示,RAR-β 2 阳性表达主要位于细胞核,RAR-β 2 蛋白在乳腺浸润癌组织中阳性表达率（30.0%）明显低于正常乳腺组织（95.0%）,χ2=26.30,P<0.05。RAR-β 2 蛋白在乳腺重度不典型增生组织中阳性表达率（17.5%）低于乳腺癌组织,但差异无统计学意义（P>0.05）。 在乳腺浸润性癌组织中,RAR-β 2 表达与患者年龄、肿瘤大小、临床分期、腋下淋巴结转移状况、组织学分级、病理学类型以及ER、PR表达状况无相关性（P 均>0.05）。 随访结果显示,28例RAR-β 2 阴性乳腺癌患者中3 例发生内脏转移,而12例RAR-β 2 阳性患者仅1 例发生骨转移。RT-PCR 结果显示,RAR-β 2 在乳腺癌、导管上皮重度不典型增生、腺纤维瘤及正常乳腺组织中阳性表达率分别为25.0%（5/20）、35.0%（7/20）、85.0%（17/20）和100%（20/20）,乳腺癌组织RAR-β 2 mRNA 明显低于正常乳腺组织（χ2=30.43,P<0.001）。 结论:RAR-β 2 可能在乳腺癌的发生过程中发挥抑制作用,并且可能在乳腺癌发生的早期发挥作用。      

角化棘皮瘤与高分化鳞状细胞癌细胞周期和细胞凋亡相关蛋白表达的研究

目的：探讨细胞周期与细胞凋亡相关蛋白p53、bcl－2、Ki－67和细胞凋亡在角化棘皮瘤（Keratoacanthoma,KA）和高分化鳞状细胞癌（Well－differentiated squamous cell carcinoma ,WDSCC）中的表达及其意义。方法应用免疫组化技术和末端特异性DNA标记技术检测44例角化棘皮瘤、20例高分化鳞状细胞癌标本中p53、bcl－2、Ki－67和细胞凋亡的表达情况。结果 KA增生期、成熟期和消退期p53阳性表达率分别为：22．23％、26．18％和6．52％,低于WDSCC 41．82％。 KA各期分别与WDSCC阳性率比较,差异有统计学意义;Ki－67的表达强度和模式同p53相似,p53表达率与Ki－67表达率呈正相关（ r＝0．986,P＜0．001）;KA中仅1例基底层见bcl－2弱阳性表达,WDSCC中2例表达呈弱阳性;KA的平均凋亡率（21．72％）明显高于WDSCC（9．93％）,两者比较差异有统计学意义,细胞凋亡率与增殖率（Ki－67）的表达呈负相关（r＝－0．824,P＜0．001）。结论增生和凋亡同时存在于KA中,早期增生占优势,而消退期凋亡占优势,最终导致KA的自然消退。 p53、Ki－67以及细胞凋亡的表达对临床鉴别KA与WDSCC有一定参考价值。     

食管癌及癌前病变组织P53蛋白表达的研究

对１９７例食管内窥镜活检组织中Ｐ５３蛋白的免疫组化分析表明，约３８．８％的食管轻度不典型增生，５２．０％的中重度不典型增生，６１．１％的原位癌和６２．５％食管浸润癌组织中有高表达的Ｐ５３蛋白。正常食管鳞状上皮和慢性皮炎症食管上皮中很少有Ｐ５３蛋白聚积，对１４例食管癌病人癌及癌旁不典型增生组织中Ｐ５３蛋白的免疫组化分析表明，９例Ｐ５３蛋白高表达的食管癌中，８例癌旁不典型增生组织也有高表达的Ｐ５３基因     

食管癌发生发展过程中环氧合酶-2蛋白表达的研究

目的 研究环氧合酶－2（Cox-2)蛋白在食管癌及癌前病变组织中的表达,探讨非类固醇抗炎药在食管癌高危人群中化学预防的可能性。方法 应用免疫组织化学方法检测120例食管癌（原位癌30例,鳞状细胞癌60例,腺癌30例）及其113例增生性病变（单纯增生29例,轻、中、重度不典型增生分别为31例、30例、23例）和27例正常食管黏膜鳞状上皮,以及3例Barrett食管组织中Cox-2蛋白的表达情况。结果 在正常食管黏膜上皮,单纯增生,轻、中、重度不典型增生,原位癌未发现有Cox-2蛋白表达;在6％（4／60）侵袭性鳞状细胞癌和70％（21／30）的食管腺癌中,Cox-2蛋白表达阳性。结论 Cox-2蛋白表达可能与食管腺癌的形成有关,而与鳞状细胞癌的发生发展无关。     

食管鳞状细胞癌及癌前病变组织中p16基因甲基化的研究

目的探讨食管鳞状细胞癌及癌前病变组织p16基因CpG岛的甲基化情况,及其在食管癌发生和早期诊断中的价值。方法采用MSP方法,对食管癌前病变不同阶段、鳞状细胞原位癌和浸润癌的病变组织进行了甲基化检测,并与其相应的正常组织和慢性食管炎组织的甲基化情况进行对比分析。结果轻、中、重度不典型增生、鳞状细胞原位癌和浸润癌的甲基化频率分别为22.73%(5/22)、46.15%(6/13)、77.78%(7/9)、78.57%(11/14)和64.86%(24/37)。67例正常对照组织中3例(4.48%)p16基因甲基化,与病变组织相比,差异有统计学意义,P=0.000。10例慢性食管炎组织中1例(10%)p16基因甲基化。结论p16基因甲基化可能是食管癌发生的最早期事件之一。     

p53及PCNA的异常表达在食管上皮增生和癌变过程中的意义

目的:研究食管上皮增生、不典型增生及原位癌中p53蛋白及增殖细胞核抗原(PCNA)的异常表达,探讨其在食管癌发生发展中的作用.方法:用免疫组化LSAB方法检测189例食管鳞癌癌旁上皮及原位癌中p53及PCNA的表达.结果:癌旁上皮中存在p53蛋白积聚,从上皮增生→不典型增生→原位癌,其阳性率依次为55 %、79 %和98 %(P＜0.01).PCNA的阳性强度也是依次递增.结论:p53蛋白的积聚在食管鳞癌癌前病变中既已存在,说明它是一个早期事件,在食管癌的发生中起一定的作用.p53及PCNA的异常表达可能成为判断食管上皮发生癌变或癌前病变的客观指标之一.     

Alterations of p53, cyclin D1 and pRB expression in the carcinogenesis of esophageal squamous cell carcinoma

Many molecular alterations occur in esophageal carcinogenesis; however, little is known about the molecular genetic events responsible for the development of carcinoma. We investigated the expression of ki67, p53, cyclin D1 and pRB in 105 biopsy specimens using immunohistochemistry from iodine unstained lesions as indicators of carcinogenesis of the esophagus. Also, the genetic alternation of esophageal dysplasia from patients with accompanying esophageal squamous cell carcinoma (ESCC) was examined to study the evidence for field carcinogenesis in the esophagus. The expression of p53, cyclin D1 and pRB was detected in 31, 0 and 51.7% respectively of mild dysplasia; 40, 0 and 70% of moderate dysplasia; 40, 20 and 70% of severe dysplasia; and 48, 32 and 80% of carcinoma specimens. p53 expression was significantly increased in mild dysplasia, whereas cyclin D1 and pRB expression were significantly increased in carcinoma as compared to both normal epithelium and esophagitis. The ki67 LI and the rate of p53 expression were significantly higher in dysplasia with ESCC than in dysplasia without ESCC. Ki67, p53, cyclin D1 and pRB expression may be useful biomarkers for assessing the risk of developing esophageal cancer. Dysplasia observed at screening for secondary lesions has a highly malignant potential and careful follow-up studies are required.     

Ki67, p27 and p53 Expression in Squamous Epithelial Lesions of Larynx

Precise assessment of the biological behavior and progression of squamous epithelial lesions of the larynx with a view to predict the prognosis and therapeutic challenges remains an elusive goal. The knowledge and data regarding the expression of proliferative markers indicating the biological activity in different histological grades of squamous epithelial lesions are lacking till date. To evaluate the relationship between Ki67, p27 and p53 expression as well as topographic distribution of Ki67 with the histological subtypes or grades of laryngeal squamous intraepithelial and invasive lesions. Sixty-two consecutive cases with histologically documented intraepithelial and invasive squamous lesion were studied for Ki67, p27 and p53 expression. Mann–Whitney U, Kruskal–Wallis and Spearman’s correlation tests were used for statistical analysis. The mean Ki67 labeling index in hyperplasia, dysplasia and carcinoma were 12.15, 22.03 and 35.53 % respectively and this difference was statistically significant (P < 0.05). There was strong positive correlation between Ki67 labeling index and increasing grades of squamous lesions. p27 expression was progressively decreased and p53 expression was progressively increased as the lesions progressed from hyperplasia to dysplasia and dysplasia to carcinoma. The topographic distribution of Ki67 positive cells increased with progressive grades of dysplasia. The Ki67 labeling index correlates well with the histological grade of both intraepithelial and invasive lesions of the larynx. And the topographic distribution of Ki67 expression depends on the grade of the dysplasia. Hence, Ki67 expression has a definite role in predicting the biological behavior of the lesions.     

Topological analysis of p21WAF1/CIP1 expression in esophageal squamous dysplasia.

In the normal stratified squamous epithelium of the esophagus, only the third to the fifth layers of cells express the cyclin-dependent kinase inhibitor p21WAF1/CIP1 (p21). Using immunohistochemical staining, we examined the topological distribution of cells expressing p21, p53, Ki67, and cytokeratin 10 (CK10), a differentiation marker of esophageal squamous cell carcinoma (SCC), in 25 superficial SCCs and 72 dysplastic lesions of the esophagus. Image analysis of p21, p53, and Ki67 expression was also performed in 48 dysplastic lesions. In superficial SCCs, although Ki67- and p53-expressing cells were mainly distributed in the deep layers of tumors despite tumor differentiation, the distribution of p21 correlated with tumor differentiation. In dysplastic lesions, p53- and Ki67-coexpressing cells tended to locate in the same layers and expand in the lower layers of epithelium with the progression of dysplasia. p21-expressing cells shifted to the upper layers of the epithelium with the progression of dysplasia. However, this change was heterogeneous; in some lesions, p21-expressing cells were confined to the superficial layers of atypical cells (confined type), whereas in others, p21-overexpressing cells were scattered among atypical cells (scattered type). CK10 expression was observed in 25% of dysplastic lesions, and the frequency of CK10 expression was significantly higher in the scattered than in the confined type. Our results suggest that esophageal squamous dysplasia represents the earliest pathological process in esophageal squamous carcinogenesis. Our results also suggest that differentiation of esophageal SCC is determined at the stage of dysplasia, and that p21 plays a critical role in the differentiation process.     

Analysis of Ki-67, p53 and Bcl-2 expression in the dysplasia-carcinoma sequence of Barrett's esophagus.

The grading of dysplasia in Barrett's esophagus has prognostic importance, however observer variation limits the reliability of simple histological analysis alone. We investigated Ki-67, p53 and Bcl-2 expression in Barrett's esophagus, in the sequence from Barrett's low-grade dysplasia to high-grade dysplasia and infiltrating adenocarcinoma. Forty-four esophagectomy specimens were utilized: 39 specimens with esophageal dysplasia and adenocarcinoma and 5 specimens with esophageal dysplasia only. This gave 83 sections (2 sections for specimens with dyplasia and carcinoma) examined from 44 patients. The sections were examined for Ki-67, p53 and Bcl-2 reactivity by immunohistochemistry. Low-grade dysplasia was present in 14 sections, high-grade dysplasia in 30 sections and carcinoma in 39 sections. Ki-67 expression occurred in 2 out of 14 (14%) sections with low-grade dysplasia, in 22 out of 30 (73%) sections with high-grade dysplasia and in 34 out of 39 (87%) sections with carcinoma (p<0.001). p53 protein expression was found in 1 of 14 (7%) sections with low-grade dysplasia, in 18 of 30 (60%) sections with high-grade dysplasia and in 33 of 39 (85%) sections with carcinoma (p<0.001). Expression of Bcl-2 was found in 11 of 14 (84%) sections with low-grade dysplasia but immunoreactivity was not seen in any section with high-grade dysplasia or Barrett's carcinoma. Our results indicate that overexpression of Ki-67, Bcl-2 protein and p53 mutations can be identified as early events during neoplastic progression in Barrett's esophagus. These data support the hypothesis that, in the progression of Barrett's metaplasia to adenocarcinoma, the balance of proliferation/apoptosis plays an important role.     

92例甲状腺癌中细胞增殖蛋白表达及其意义

目的：探讨甲状腺癌组织中p53、PCNA和Ki-67蛋白表达及其与临床病理的关系.方法：应用免疫组化sP法对92例甲状腺癌组织中p53、PCNA和Ki-67蛋白进行检测.结果：甲状腺癌组织p53阳性表达率为54.3%（50/92）,PCNA阳性表达率为56.9%（52/92）,Ki-67增殖指数为（12.01±3.32）%.p53、PC-NA过度表达及Ki-67增殖指数增加与浸润程度及淋巴结转移有关.结论：p53、PCNA和Ki-67蛋白表达与癌的浸润程度及淋巴结转移有关,p53、PCNA和Ki-67联合检测对甲状腺癌的早期诊断、预后判断及制定合理的临床治疗方案有重要意义.     

Bax protein expression in DCIS of the breast in relation to invasive ductal carcinoma and other molecular markers

This study describes the incidence of Bax protein expression in a series of 106 cases of breast cancer including 56 cases of ductal carcinoma in situ (DCIS) and 50 cases of invasive ductal carcinoma (IDC). Relationships of Bax expression to the histological grades of DCIS & IDC, and to the expression of Ki67, ER, p53, cerbB2 & Bcl2 are described. The expression of Bax, Ki67, ER, p53, cerbB2 and Bcl2 proteins is determined immunohistochemically. Cases were regarded positive for Bax, Bcl2 and cerbB2 when they showed either moderate or strong staining for these markers. The nuclear stains (Ki67, ER, and p53) were quantified in terms of percentage positive cells and cases for ER and p53 were considered positive when more than 10% cells were labelled. DCIS were graded histologically as well (n=18), intermediately (n=18), and poorly differentiated (n=20) Invasive ductal carcinoma was graded as grade I (well-differentiated) n=7, grade II (intermediate) n=24 and grade III (poorly differentiated) n=19. 65/106 cases (61%) were Bax positive including 37/56 (66%) of DCIS and 28/50 (56%) of IDC. Bax expression did not correlate to increasing histological grades of either DCIS or IDC. It did not correlate to Ki67, ER, p53 or cerbB2 but positive correlation was seen with Bcl2 (p=0.003). Bcl2 immunostaining displayed a negative correlation with increasing histological grades both of DCIS and IDC (p=0.026), (p=0.041) respectively. There was a trend of negative correlation of Bcl2 with Ki67 (p=0.062). It correlated positively with Bax (p=0.003) and ER (p<0.0001). Results suggest that the regulation of apoptosis is important in ductal carcinoma in situ of the breast as well as invasive ductal carcinomas. Bcl2 is associated with good prognostic markers in both DCIS and IDC, whereas the regulation of Bax is complex and does not necessarily correlate with mutant p53.     

Changes in apoptosis and mitotic index, p53 and Ki67 expression in various types of oral leukoplakia

INTRODUCTION: Leukoplakia is the most frequent pre-blastomatous alteration in the oral cavity. Its potential for malignant transformation is unpredictable. The aim of the present study was to provide data about the processes and molecular genetic background of this disease. MATERIALS AND METHODS: Leukoplakias of 15 patients and oral squamous cell carcinomas of 3 patients treated at the Department of Periodontology and Oral Surgery, Semmelweis University, were studied by histological and immunohistochemical methods. The samples were fixed in 4% formalin and embedded in paraffin. Hematoxylin and eosin staining, TUNEL reaction (Apop-Detect kit), and immunohistochemical reactions for Ki67 and p53 were applied. The severity of dysplasia, the mitotic and apoptotic indices and expression as well as distribution of Ki67 and p53 were examined and compared to the clinical appearance of leukoplakia. RESULTS: The mitotic and apoptotic indices and Ki67 expression increased significantly in parallel with the severity of dysplasia and also with the clinical stage (homogenous, nodular, erythroleukoplakia). The positivity and intracellular localization of (mutant) p53 varied according to the clinical form of leukoplakia. Homogenous and nodular forms showed cytoplasmic staining, while erythroleukoplakia and carcinoma cases were characterized by nuclear positivity. CONCLUSIONS: The increased apoptotic and Ki67 indices may indicate an unfavorable prognosis for leukoplakia. The expression of Ki67 and p53 in various forms of leukoplakia point to the increasing instability of the genome in parallel with the severity of leukoplakia.     

The prognostic significance of p53, p27 kip1, p21 waf1, HER-2/neu, and Ki67 proteins expression in gastric cancer: a clinicopathological and immunohistochemical study of 121 Arab patients

BACKGROUND: The variability of prognosis within a pathological stage of gastric cancer (GC) at presentation, underscores the need for specific biological markers to identify subgroups of patients with aggressive course for intensive treatment. To our knowledge, this is the first study from an Arab population reporting on the relationship of p53, p27 kip1, p21 waf1, HER-2/neu, and Ki67 expression, and clinicopathological features and their prognostic significance. METHODS: Formalin-fixed paraffin-embedded tumors were studied by immunohistochemistry, using monoclonal antibodies to p53, p27 kip1, p21 waf1, HER-2/neu, and Ki67. The results were correlated with clinicopathological features and survival. RESULTS: M:F = 80:41; median age = 60 years; stage III and IV = 71%; and median follow-up = 34.4 months. Positive expression rates of p53, p27 kip1, p21 waf1, Ki67, and HER-2/neu were 54%, 40%, 8.3%, 70%, and 12% respectively. p53 expression correlated with age <60 years (P = 0.03), tumor size >5 cm (P = 0.01), p27 kip1 and Ki67 expression (P = 0.0001), and HER-2/neu (P = 0.04). p21 waf1 correlated inversely with T-stage (P = 0.008) and Her-2/neu expression correlated with histological grade (P = 0.04) and T-stage (P = 0.008). Univariate analysis showed that p53 overexpression (P = 0.01), fungating and infiltrative macroscopic appearance (P = 0.02), size >5 cm (P = 0.0001), lymph node metastasis (P = 0.0001), p T3 and T4 disease (P = 0.01), and overall stage III and IV (P = 0.0001) disease were adverse prognostic factors. Patients with tumor profiles p53 (-)/p27 (+) had better survival than those with p53 (+)/p27 kip1 (-)(P = 0.02). On multivariate analysis by Cox regression model, the expression of p53 (P = 0.03) and lymph node involvement (P = 0.01) were significant adverse prognostic factors for overall survival. CONCLUSIONS: The expression of p53 in Arab patients with GC correlates with aggressive tumor characteristics and is an independent prognostic factor. The combined analysis of p53 and p27 kip1 is of added prognostic value.     

乳腺浸润性导管癌组织Ki-67和p53蛋白的表达及其临床意义

目的检测乳腺浸润性导管癌组织中Ki-67和p53的表达,并探讨其表达在乳腺浸润性导管癌中的临床意义。方法免疫组化S-P法检测乳腺浸润性导管癌组织及乳腺良性病变组织中Ki-67和053的表达,统计学分析Ki-67和053表达与乳腺浸润性导管癌患者临床病理特征及预后的关系。结果Ki-67和p53蛋白在乳腺浸润性导管癌中均呈高表达,42例组织中Ki-67阳性表达率78．6％,p53为38．1％,乳腺良性病变中Ki-67无表达,2例053阳性表达,两组存在显著性差异;Ki-67与p53的表达率随浸润性导管癌TNN分期的增高而上升,另外Ki-67表达与浸润性导管癌的大小密切相关。结论Ki-67和p53蛋白与浸润性导管癌TNM分期密切相关,对其进行联合检测可有助于浸润性导管癌的预后判断。