肝细胞癌临床病理学特征与p53蛋白表达的关系

应用免疫组织化学技术检测29例肝细胞癌（肝癌）和23例肝硬化标本中突变型p53蛋白的表达，并探讨后者与肝癌临床病理学特征之间的关系。结果：肝癌突变型p53蛋白表达阳性率为70％（20／29），癌旁组织阳性率为60％（18／29），肝硬化组织阳性率为30％（7／23），有血管侵犯的12例肝癌变变型p53蛋白表达均为阳性，而无血管侵犯的17例中仅8例为阳性（P＜0．05）；突变型p53蛋白阳性组血清甲胎蛋白（AFP）明显高于阴性组（8370±4764ng／ml比98．7±64．3ng／ml，P＜0．05）。提示：P53蛋白表达在肝硬化时即发生了异常；p53蛋白异常可能是AFP基因被激活的原因之一；p53蛋白异常有利于肝癌向门静脉转移。     

结肠癌组织中 Bmi －1和 p53的表达及意义

目的：探析结肠癌组织中 Bmi －1和 p53的表达情况及意义。方法：采用免疫组织化学 SP 法对60例结肠癌及其相应癌旁组织中 Bmi －1和 p53的蛋白表达情况进行检测。结果：结肠癌组织中 Bmi －1阳性表达34例（阳性率为56．7％）,相应癌旁结肠组织中阳性表达2例（3．33％）,结肠癌组织中 p53阳性表达44例（阳性率为73．3％）,相应癌旁组织中无阳性表达（0％）,结肠癌与正常组织中 Bmi －1和 p53表达率差异具有统计学意义（P ＜0．05）;Bmi －1和 p53的表达与患者的一般资料如年龄、性别和浸润深度方面关联不大（P＞0．05）,而与分化程度、有无淋巴结转移（P ＜0．05）及 Duke＇s 分期（P ＜0．01）方面关联明显。同时,Bmi －1和 p53的表达呈显著正相关（r ＝0．461,P ＜0．01）。结论：Bmi －1和 p53的表达情况可作为评估结肠癌预后的有效指标,Bmi －1和 p53可能成为预测结肠癌高度转移的新分子标志物。     

p21^WAF1／CIP1在甲状腺癌组织的表达及临床意义

目的：探讨p21^WAF1/CIP1与P53基因在甲状腺癌中的表达与病理类型和分化的程度的关系。方法：应用免疫组化技术检测甲状腺癌组织中的抑癌基因P21^WAF1/CIP1及P53基因的表达,统计学采用X2检验。结果：甲状腺腺瘤（TT）,甲状腺乳头状癌（PTC）,滤泡状癌（FTC）,未分化癌（UDC）组织P21蛋白阳性率分别为66．7％,62．5％,58．3％,50．0％,各组之间无显著差别（P＞0．05）,高分化癌（WDC）,低分化癌（PDC）,UDC组织P21蛋白阳性率分别为67．7％,46．2％,50．0％,各组之间无显著差别（P＞0．05）,PTC,FTC,UDC组织,P53蛋白阳性率分别为31．3％,25．0％,64．2％,UDC与PTC,FTC之间存在显著差别（P＜0．05）,WDC,PDC,UDC组织P53蛋白阳性率分别为16．1％,61．5％,64．3％,WDC的阳性率明显低于PDC,UDC（P＜0．05）,P53蛋白阳性的癌组织P21蛋白阳性率为40．9％（9／22）,P53蛋白阴性的癌组织P21蛋白阳性率为69．4％（25／36）,两者之间存在显著差异（P＜0．05）,结论：甲状腺癌中P21^WAFI/CIPI的表达与其病理类型和分化程度无关,而P53基因的表达与甲状腺癌病理类型和分化程度有关。P21^WAFI/CIPI作为一新的抑癌基因,其表达相当程度上依赖于P53蛋白。     

胃癌中P—gp,GST— π，Top—Ⅱ和p53的表达及其相关性研究

目的：探讨胃癌患者P－糖蛋白、Top-Ⅱ和p53的表达与胃癌发生发展的相关性。方法：应用免疫组织化学（IHC）方法对66例胃癌组织和癌旁正常粘膜进行同位P－gp,GST- π,Top-Ⅱ和p53蛋白的检测,结果：胃癌各蛋白的检测阳性率分别为P－gp36．36％（24／66）,GST- π39．54％（26／66）,Top-Ⅱ50％（33／66）和p5360．61（40／66）。Top-Ⅱ在中等分化腺癌的阳性表达明显高于其它类型（P＜0．05）p53的阳性表达与患者预后差有关（P＜0．01）,并与P－gp的阳性表达密切相关（P＜0．01）,结：胃癌中P－gp低水平表达与胃癌的高度耐药不一致,可能存在其它的耐药机制,p53蛋白的累积mdr耐药密切相关。     

胃癌中P-gp,GST-π,Top-Ⅱ和p53的表达及其相关性研究

目的探讨胃癌患者P-糖蛋白、GST－π、Top－Ⅱ和p53的表达与胃癌发生发展的相关性。方法应用免疫组织化学（IHC）方法对66例胃癌组织和癌旁正常粘膜进行同位P－gp、GST－π、Top-Ⅱ和p53蛋白的检测。结果胃癌各蛋白的检测阳性率分别为P－gp36.36％（24／66）,GST－π39．54％（26／66）,Top－Ⅱ50％（33／66）和p5360．61（40／66）。Top－Ⅱ直在中等分化腺癌的阳性表达明显高于其它类型（P＜0．05）。p53的阳性表达与患者预后差有关（P＜0．01）,并与P－gp的阳性表达密切相关（P＜0．01）。结论胃癌中P－gp低水平表达与胃癌的高度耐药不一致,可能存在其它的耐药机制,p53蛋白的累积与mdr耐药密切相关。     

增殖细胞核抗原和p53蛋白在胆囊癌中的表达

本文应用PCNA和p53抑癌基因蛋白的免疫络化方法，对11例胆囊上皮良性病变和33例胆囊癌进行了研究，结果发现胆囊良性病变和胆囊癌的平均PCNA指数分别为：良性病变为24．1％（n＝11．x±24．6），高分化癌为48．0％（n＝13，x±12．8），中分化癌为49．5％（n＝11，x±15．4）．低分化癌为76．4％（n＝9，x±18．1）；高分化胆囊癌平均PCNA指数明显高于良性病变（P＜0．05）；低分化癌的平均PCNA指数明显高于高分化癌（P＜0．05）；11例胆囊上皮良性病变均无p53蛋白阳性表达；33例胆囊癌p53阳性表达12例（36．4％），高分化癌p53阳性率为15．4％（2／13）．中分化癌45．5％（5／11）．低分化癌55．6％（5／9）：各组阳性率比较无显著性差异（P＞0．05）；PCNA指数≥50％的胆囊癌其p53蛋白阳性率明显高于PCNA指数＜50％的胆囊癌（P＜0．05）。结果提示：PCNA指数与胆囊癌的分化程度有关．PCNA及p53蛋白的免疫组化染色对胆囊上皮良、恶性病变的鉴别论断有帮助。本文还就胆囊癌p53蛋白表达与PCNA指数的关系进行了讨论。     

抑癌基因p53在大肠癌中的表达及其意义

用免疫组织化学方法检测55例大肠癌中抑癌基因p53蛋白的过度表达，以探讨大肠癌的发生与组织学的类型及分化程度的关系。结果显示：p53蛋白的过度表达在大肠癌中为53．8％，而在正常及良性肿瘤中为阴性。按Turbull氏分期，不同分期大肠癌中p53蛋白过度表达阳性率不同，早期癌（Ⅰ－Ⅱ）中为32．1％（9／28）；晚期癌（Ⅲ－Ⅳ）中为48．1％（13／27），差异明显（P＜0．015），p53蛋白过度表达在不同组织类型中阳性率不同，粘液腺癌中阳性率（41．6％）明显低于管状腺癌（66．6％）和乳头状腺癌（53．3％）的阳性率。其粘液腺癌与管状腺癌的差别较显著（P＜0．05）。p53蛋白的过度表达在不同分化程度的大肠癌中阳性率不同，高分化癌中为37．5％，而低分化癌中为75．4％，差异显著（P＜0．05）。提示：p53蛋白过度表达可能发生于大肠癌病理过程的较晚阶段，作为大肠癌的预后指标可能有参考价值。     

肺癌MTS1/p16和p53表达与细胞增殖

（目的〕研究肺癌中MTS1／p16和p53基因产物的表达与细胞增殖的关系。〔方法〕应用SP免疫组织化学方法研究62例肺癌组织中p16蛋白和p53蛋白的表达情况，并进行增殖细胞核抗原检测，计算细胞增殖指数（PI）。(结果)62例肺癌组织中p16蛋白和p53蛋白阳性率分别为58．1％和59、7％。晚癌p16蛋白的阳性率明显高于小细胞癌（p＜0.05）；淋巴结转移阳性组p16蛋白的表达显著低于阴性组（P＜0．05）；PI分级为巨级的p16蛋白表达显著高于Ⅳ级（p＜0.05）。不同组织类型肺癌中p53蛋白的表达未见明显差异，淋巴结转移阳性组p53蛋白的表达高于阴性组（p＜0.01〕；不同PI分级中p53蛋白的表达，N级明显高于1级和Ⅱ级（P＜0．05），三级明显高于1级（p＜0．05）和Ⅱ级（P＜0.01）。p16蛋白低表达和p53蛋白过度表达之间未见明显相关性。（结论〕提示p16蛋白低表达和p53蛋白过度表达均有促进肺癌细胞增殖的作用，p16蛋白的表达与肺癌的细胞分化有关，p53蛋白过度表达对肺癌细胞的转移起重要作用。抑癌基因p53对MTS1／p16基因无明显调控作用。检测p53蛋白表达可作为肺癌诊断的一项新指标。     

p53蛋白在大肠癌中过度表达与组织学类型及分级的关系

目的：探讨大肠癌的发生与组织学的类型及分化程度的关系。方法：用免疫组织化学及常规病理学方法检测55例大肠癌中抑癌基因p53蛋白的过度表达。结果：p53蛋白的过度表达在大肠癌中为8％,而在正常组织及良性肿瘤中为无表达,按Turbull分期,不同分期大肠癌中p53蛋白过度表达阳性率不同,早期癌（Ⅰ－Ⅱ期）中为32．1％。（9／28）,晚期癌（Ⅲ－Ⅳ期）中为48．1％（13／27）（P＜0．015）,p53蛋白过度表达在不同组织类型中阳性率不同,如粘液腺癌为41．6％,明显低于管状腺癌的66．6％和乳头状腺癌的53．3％的阳性率。其粘液腺癌与管状腺癌的差异显（P＜0．05）,p53蛋白的过度表达在不同分化程度的大肠癌中阳性率亦不同,高分化癌为37．5％;而低分化癌为75．4％,（P＜0．05）。结论：p53蛋白过度表达可能发生于大肠癌病理过程的晚期阶段,可作为大肠癌有参考价值的预后指标之一。     

人膀胱移行细胞癌HPV—18感染与G1—细胞周期表达的关系

目的：探讨人膀胱移行细胞癌（transitional cell carcinoma,TCC)组织内人乳头瘤病毒18例型（human papillomavirus type 18,HPV-18)DNA与G1－细胞周期素（D1和E）表达之间的关系。方法：用免疫组织化学方法检测57例人膀胱TCC组织（PCR测定29例HPV－18 DNA阳性、28例阴性）及对照组（7例正常膀胱）G1－细胞周期素的表达。结果：细胞周期素D1在癌组织中表达的阳性率71．93％（41／57）;HPV－18DNA阳性组阳性率55．17％（16／29）,阴性组阳性率为89．29％（25／28）,阳性组表达率较阴性组低,两者表达有差异（P＜0．05）;与对照组14．29％（1／7）相比,癌组织表达明显增高（P＜0．05）。细胞周期素E在癌组织中表达阳性率为63．16％（36／57）,在HPV－18DNA阴性（67．86％）和阳性组（58．62％）之间无明显差异（P＞0．05）;与对照组（0％）相比,癌组织表达明显增高（P＜0．05）。结论：G1－期细胞周期素的改变与膀胱移行细胞癌的发生相关。HPV－18DNA与细胞周期素D1表达存在显著的负相关。     

ER,EGFR,p53在乳腺癌组织中的比较研究

采用免疫组化染色技术,检测７５例原发乳腺癌组织中雌激素受体（ＥＲ）,表皮生长因子受体（ＥＧＦＲ）及ｐ５３的表达。结果表明：ＥＲ、ＥＧＦＲ、ｐ５３的阳性表达率分别为４９．３％、４１．３％和３７．３％。ＥＲ、ＥＧＦＲ的表达与腋淋巴结转移、临床分期有明显相关性（Ｐ＜０．０５）;与年龄及肿瘤大小无明显相关性（Ｐ＞０．０５）。ＥＧＦＲ与ＥＲ有负相关性（Ｐ＜０．０５）。在有４个以上腋淋巴结转移的２１例病例中,ＥＧＦＲ阳性者１４例,占６６．７％。２０例临床Ⅲ期的病例,ＥＧＦＲ阳性者１５例,占７５．０％。ｐ５３的表达与腋淋巴结转移、临床分期、年龄及肿瘤大小均无明显相关性（Ｐ＞０．０５）;与ＥＲ呈负相关性（Ｐ＜０．０５）;与ＥＧＦＲ呈正相关性（Ｐ＜０．０５）。研究认为ＥＧＦＲ蛋白表达阳性的乳腺癌病人预后不良,ｐ５３蛋白表达阳性与乳腺癌病人的预后无明显相关性。     

An immunohistochemical study of p21 and p53 expression in primary node-positive breast carcinoma.

AIMS: p21, an inhibitor of cyclin-dependent kinase, is involved in the p53 pathway of growth control. Its expression has been linked to cellular differentiation. It has been implicated in p53-mediated growth arrest following DNA damage and in terminally differentiated cells. This study analysed p21 and p53 expression, in a series of node-positive patients with breast carcinoma and examined histopathological parameters of the tumour and the prognostic implications of p21 and p53 expression. METHODS: One hundred and five consecutive patients with node-positive disease and at least 3 years follow-up were identified. Sections were stained for p53 and p21 using monoclonal antibodies. Results were expressed as percentage positive cells, and over 20% considered positive for p53 and over 10% considered for p21. RESULTS: p21 was overexpressed (>10% of cells positive) in 65% of patients and p53 was overexpressed (>20% of cells positive in 68%. The mean (SEM) level of p21 staining was 5.7(0.8)% and was 54.9(4.0)% for p53. There was no correlation between p21 and p53 expression (r=0.071 P=0.5). There were no significant differences in demographic criteria between patients that were p21 positive or negative and p53 positive or negative. There were no significant differences in tumour type, grade or stage between the groups. p21 expression did not have prognostic significance; however, p53 positivity was associated with a worse prognosis, which remained when controlled for stage. CONCLUSIONS: This study demonstrated p21 overexpression in 65% of patients with node-positive breast carcinoma. Levels did not correlate with p53 status and unlike p53 failed to have prognostic significance. Copyright Harcourt Publishers Limited.     

膀胱移行细胞癌中p53突变、bcl-2和PCNA表达的临床意义

目的　　探讨膀胱癌中bcl-2、p53、PCNA表达与细胞增殖、凋亡和临床病理学参数之间的关系。方法　　SABC 免疫组化分折62例(T1GI —G339 例,T2-T4aG3　NOM023例)甲醛固定和石蜡包埋的膀胱癌标本bcl-2、p53 和PCNA蛋白的免疫反应性。平均随访37个月,24例复发。增殖指数(PI)表示肿瘤细胞中PCNA阳性细胞百分比。TUNEL法检测细胞凋亡,凋亡指数(AI)表示肿瘤细胞中凋亡细胞的百分比。结果　　62例膀胱癌中,50例(80.0%)发生p53突变,与G1(72.7%)和G2(78.5%)相比较G3(91.3%)更多见(P<0.05);pT2期(95.7%)p53突变率较pTa-1期(74.3%)高(P<0.叭)。14例(22.5%)发现有bel-2表达,bcl-2表达阳性率G3明显高于G1和G2(P<0.05),与分期无关(P>0.05)。Bcl-2表达与p53突变无关。在膀胱癌中,PI 为17.2%～41.8%(平均为22.4%),AI为1.9%-3.5%(平均为2.9%)。统计分析显示PI与肿瘤分级、分期关系密切,AI与肿瘤的分级有明显关系。结论　　结果表明,p53突变与浸润性行为呈正相关。在膀胱癌中p53和PCNA过表达可能能提供有价值的预后信息。随着肿瘤的进展,肿瘤细胞过度增殖可能伴有频繁的凋亡,但增殖指数的增加明显强于凋亡指数的增加。     

p53蛋白表达对不同部位大肠癌患者预后判断的价值

目的　探讨p5 3蛋白过度表达对不同部位大肠癌患者预后判断的价值。方法　应用免疫组化方法检测 75例大肠癌组织中 p5 3蛋白表达情况。 结果　p5 3蛋白表达阳性率为 46.7% (3 5 / 75 )。远侧大肠癌 p5 3蛋白表达率 (5 9.5 % )显著高于近侧者(3 0 .3 % ) (P <0 .0 5 )。p5 3蛋白表达与其它临床病理因素无明显相关。全组中位数随访时间为 60个月 ,p5 3蛋白表达阳性与阴性患者术后总生存率比较有显著性差异 (P <0 .0 5 )。在远侧大肠癌组织中 p5 3阳性患者的预后明显差 (P <0 .0 1)。而在近侧大肠癌中 ,2组患者的预后则无显著性差异 (P >0 .0 5 )。结论　不同部位大肠癌 p5 3蛋白表达存在一定差异 ,p5 3蛋白过度表达对远侧大肠癌患者预后判断有重要作用     

The prognostic significance of the accumulation of p53 tumour-suppressor gene protein in gastric adenocarcinoma.

We have studied the expression of p53 in 206 patients with gastric adenocarcinomas. A standard immunohistochemical technique employing the CM-1 anti-p53 polyclonal antibody was applied to the routinely fixed and paraffin-embedded material from these tumours; overexpression of p53 was defined as positive nuclear staining: 46% (94/206) of gastric carcinomas expressed high levels of p53. There was no significant correlation between p53 positivity and the tumour grade, growth pattern, the Lauren type or lymph node metastases. Correlation with disease stage was only marginally significant (P = 0.05). Life table analysis revealed a highly significant association between p53 expression and survival (P = 0.0062), the odds ratio of death being 1.89 (95% confidence interval 1.33-2.69). The overall 5-year survival of patients with p53-positive tumours was 3% compared with 16% for those with p53-negative tumours (median survival time being 5.6 and 11.4 months respectively). These data suggest that overexpression of the p53 oncoprotein is an independent marker of shortened survival in gastric cancer patients.     

In squamous cell carcinoma of the vulva, overexpression of p53 is a late event and neither p53 nor mdm2 expression is a useful marker to predict lymph node metastases.

To offer more tailored treatment to individual patients with squamous cell carcinoma of the vulva, more accurate prediction of lymph node metastases is required. As p53 and mdm2 are genes known to be involved in the development of other tumours, we studied expression of p53 and mdm2 in carcinogenesis of squamous cell carcinoma of the vulva and their clinical relevance. Archival material of 141 T1 and T2 vulvar tumours were used. Of the 141 primary tumours, the corresponding 39 lymph node metastases (LNM) were studied, and in 90 cases the pre-existent epithelia adjacent to the tumour (EAT) and in 14 cases vulvar intraepithelial neoplasia adjacent to the tumour (VIN) was also investigated. Detection of p53 and mdm2 protein was immunohistochemically performed. Scoring categories were: negative (1); weakly positive (2); moderately to markedly positive (3); and markedly positive (4). Overexpression of p53 was seen in 56% of the LNM, 39% of the primary tumours, 21% of the VIN lesions and 0% in the group of EAT. No relation was found between overexpression of p53 in the primary tumour and LNM. Expression of mdm2 was seen in 14% of the primary tumours, of which four cases were marked positive. In the group of LNM no mdm2-positive staining was observed. In the group of EAT, 25% was mdm2-positive, of which six cases were marked positive. In the group of VIN, 36% showed moderate (score 3) mdm2 expression. No relation was found between expression of mdm2 and LNM. In squamous cell carcinoma, overexpression of p53 is a late event in carcinogenesis. Marked expression of mdm2 is rarely seen in vulvar carcinomas, indicating that aberrant p53 cannot induce mdm2 expression. LNM cannot be predicted by detection of these proteins.     

p53 immunodetection of liquid-based processed urinary samples helps to identify bladder tumours with a higher risk of progression

p53 could help identify bladder tumour cases with a risk of progression from superficial to invasive disease. Semiautomatic, liquid-based cytology (LBC) techniques offer an opportunity to standardise molecular techniques. The aim of our study was to investigate whether LBC could improve p53 immunolabelling, and to assess whether urinary p53 could have a prognostic value. Immunoreactivity for p53 was studied in 198 urine samples after treatment with the Cytyc Thinprep processor. After antigen retrieval, cells were labelled with a monoclonal antibody that recognises both wild-type and mutant form of the p53 protein (Clone DO-7, Dako), 1/1000. Positivity for p53 was assessed in 17.2% of the cases. High-grade (G3) tumours were positive in 74.1% of the cases. Comparatively, low-grade (G1-2) urothelial carcinomas were positive in 23.5% of the cases. During a median follow-up period of 26 months, recurrence was observed in 52.9% of the cases with p53 overexpression, and in only 10.9% of negative cases (P < 0.001). The progression rate was 35.3% of p53-positive cases vs 5.5% of p53-negative cases (P < 0.001). Progression-free survival was significantly shorter in patients with p53 accumulation (P = 0.007). In a multivariate analysis stratified on grade and stage, p53 was an independent predictor of overall survival (P = 0.042). The results show that using Thinprep LBC, p53 immunolabelling of voided urothelial cells allows most high-grade tumours to be detected and may help identify cases with a higher risk of recurrence and progression.     

食管鳞状细胞癌中nm23-H1和p53蛋白表达及其相互关系

目的:探讨食管鳞癌组织中p53和nm23-H1蛋白的表达与癌组织分化浸润转移的关系,以及探讨两者之间的相关性,并进一步分析癌组织中p53和nm23-H1蛋白表达对食管癌患者的预后意义。方法:采用免疫组织化学(S-P法)方法对100例人食管鳞癌组织中的p53和nm23-H1蛋白的表达情况进行检测。结果:100例食管鳞癌组织中,nm23-H1阳性表达者70例(阳性率为70%),p53阳性表达者64例(阳性率为64%)。nm23-H1蛋白表达与食管癌淋巴结转移有关(P<0.025),与食管鳞状细胞癌的分化程度、肿瘤部位、浸润深度、病变长度以及患者性别、年龄无关(P>0.05)。p53蛋白表达与食管鳞状细胞癌的分化程度、浸润深度有关(P<0.05),与食管癌淋巴结转移、肿瘤部位、病变长度、患者性别、年龄无关(P>0.05)。高分化鳞癌组织中p53明显低表达(29.2%);低分化鳞状细胞癌组织中p53表达明显增高(71.4%)。食管外膜受累者p53表达较高(56%);仅发生食管粘膜和(或)粘膜下浸润组的癌组织中未发现有p53蛋白的表达。食管癌组织中nm23-H1蛋白低(高)表达与p53高(低)表达之间有明显相关性(P<0.01)。nm23-H1和p53蛋白表达亦与食管癌的TNM分期密切相关(P<0.05)。食管癌TNM分期越晚,其癌组织中nm23-H1蛋白表达越低,p53蛋白表达越高。结论:nm23-H1基因低表达与p53基因高表达可能在食管鳞状细胞癌浸润转移过程中发挥重要作用。nm23-H1可以作为食管鳞状细胞癌患者预后的基因标记,其蛋白表达产物的检测可以用于患者预后的判断,并为患者治疗方案的制定提供参考。     

Dual colour flow cytometry of p53 and c-erbB-2 expression related to DNA aneuploidy in primary and metastatic breast cancer.

DNA aneuploidy and p53 or c-erbB-2 expression were simultaneously measured in 29 breast tumours by two-colour flow cytometry. (i) The majority of tumours had some cells expressing either p53 (5-68%) or c-erbB-2 (1-56%). (ii) Expression of p53 and c-erbB-2 was observed mainly in the aneuploid population of mixed aneuploid and diploid tumours but there was no significant correlation with a specific DNA index. Aneuploid tumours contained higher percentages of c-erbB-2 positive cells (average 25%) than purely diploid tumours (average 15%) but this just failed to reach significance (P = 0.074). No relevant trends were noted for p53 expression. (iii) Significantly increased c-erbB-2 expression was observed in stage 2 tumours (26%) compared to stage 1 tumours (12%) (P = 0.001) with no trend evident for p53 expression. (iv) The metastatic tumour in the axillary node contained similar or slightly higher percentages of positive cells than the matched primary tumour.     

P53和P21过表达与胃癌淋巴结转移呈正相关

应用Ｓ－Ｐ免疫组化方法研究Ｐ５３和Ｐ２１表达变化与胃癌肿瘤组织分型、细胞增殖和浸润深度及淋巴结转移的关系。发现Ｐ５３阳性染色率为４８．９％，Ｐ５３阳性染色与胃癌肿瘤浸润深度及癌细胞增殖活性呈正相关（Ｐｅａｒｓｏｎ列联系数分别为Ｐ＝０．３２和Ｐ＝０．３５，Ｐ＜０．０５）。同时发现Ｐ２１阳性染色率为７０．０％，Ｐ２１阳性染色与胃癌肿瘤组织分型及癌细胞增殖活性呈正相关（Ｐｅａｒｓｏｎ列联系数分别为Ｐ＝０．３３和Ｐ＝０．５２，Ｐ＜０．０５）。Ｐ５３和Ｐ２１阳性肿瘤的淋巴结转移率（９３％和８１％）分别均明显高于其阴性表达的肿瘤（６０％和５５．５％，Ｐ＜０．０５）。Ｐ５３和Ｐ２１过表达对胃癌淋巴结转移率的贡献为以Ｐ５３过表达为主的独立的联合作用。提示Ｐ５３和Ｐ２１过表达在胃癌淋巴结转移和肿瘤增殖中起重要作用。Ｐ５３过表达与肿瘤浸润有关，而Ｐ２１过表达与肿瘤组织分型有关。