Bcl—2,Bax,P21—WAF1,P16—MTS1蛋白在胃腺癌演化系列中 …

目的 通过对胃腺癌演化系列胃粘膜中Ｂｃｌ－２,Ｂａｘ,Ｐ２１－ＷＡＦ１,Ｐ１６－ＭＴＳ１蛋白的检测,探讨胃腺癌发生的机制及四种蛋白表达与胃腺癌生物学行为的关系。方法 １,利用免疫组化Ｓ－Ｐ法检测胃癌演化系列胃粘膜中Ｂｃｌ－２,Ｂａｘ,Ｐ２１－ＷＡＦ１,Ｐ１６－ＭＴＳ１蛋白的表达;２,利用ＳＰＳＳ统计软件包统计学分析处理。结果 在ＣＳＧ,ＣＡＧ,ＩＭ系列胃粘膜中Ｂａｘ,Ｂｃｌ－２表达先高后低,而Ｐ１     

Runx3、Sp1、Bcl-2在胃腺癌中的表达及对预后的影响

目的探讨Runx3、Sp1、Bcl-2在胃腺癌中的表达,为评估患者预后提供实验依据。方法采用免疫组织化学SP法检测Runx3、Sp1、Bcl-2蛋白在63例胃腺癌、19例低级别上皮内瘤变及10例正常胃黏膜组织中的表达。结果胃腺癌组织中Runx3表达降低,Sp1和Bcl-2蛋白表达增高。Runx3低表达与肿瘤细胞的分化程度、浸润深度及淋巴结转移有关（P〈0.05）;Sp1高表达与肿瘤细胞浸润深度、淋巴结转移及临床分期有关（P〈0.05）;Bcl-2高表达与肿瘤细胞分化程度有关（P〈0.05）。胃腺癌组织中Runx3与Bcl-2阳性表达呈负相关（P〈0.01）;Sp1与Bcl-2阳性表达呈正相关（P〈0.01）;Runx3与Sp1的表达无明显相关性。Runx3及Sp1阳性表达率与患者总生存率关系密切。结论 Runx3蛋白低表达及Sp1蛋白高表达与胃腺癌的发生、发展及预后密切相关。     

胃癌组织中CyclinD1和p21WAF1蛋白的表达及临床意义

目的 探讨CyclinD1和p21WAF1蛋白在胃癌组织中的表达及其临床意义.方法 应用免疫组织化学S-P法检测88例胃癌组织中CyclinD1和p21WAF1蛋白的表达,并与癌旁组织对照.结果 胃癌组织中CyclinD1蛋白的阳性表达率为56.8％(50/88).CyclinD1蛋白的阳性表达与胃癌的组织学类型和分化程度有关(P均＜0.05),而与浸润深度和淋巴结转移均无明显相关性(P均＞ 0.05).p21WAF1蛋白的阳性表达率为26.1％(23/88).p21WAF1蛋白的阳性表达与胃癌的组织学类型、分化程度、浸润深度、淋巴结转移均有关(P均＜ 0.05),且p21WAF1与CyclinD1蛋白表达呈负相关(r=-0.488,P＜0.05).结论 胃癌组织中CyclinD1阳性蛋白高表达、p21WAF1阳性蛋白低表达,且其表达与胃癌的发生、发展有关.     

胃腺癌组织P53,P63和P73蛋白表达的意义

目的:探讨P53,P63和P73蛋白表达与胃腺癌临床病理特征之间的关系．方法:用免疫组织化学技术,检测72例胃腺癌及其癌旁正常组织中P53,P63和P73蛋白表达情况．所有研究对象均为湖北地区汉族人．其中,癌肿位于胃远端(胃窦、胃角)51例,胃近端(胃底、胃体)21例;肠型GAC 44例、弥漫型28例;高分化腺癌20例、中分化腺癌29例、低分化和未分化腺癌23例;TNM分期:Ⅰ和Ⅱ期13例,Ⅲ和Ⅳ期59例．结果:胃腺癌组织中P53,P63和P73蛋白阳性表达率均明显高于正常组织(X2=4．72,P<0．05; X2=5．51,P<0．05;X2=9．75,P<0．01);胃窦／胃角腺癌与胃底／胃体腺癌组织P53蛋白表达率无显著差异(P>0．05);在弥漫型胃腺癌中的表达率明显高于肠型胃腺癌(X2=4．68,P<0．05);在低分化腺癌与高中分化腺癌之间以及Ⅲ,Ⅳ期腺癌与Ⅰ,Ⅱ期胃腺癌之间的表达率的差异均有显著性(X2=7．06,P<0．05;X2=3．95, P<0．05)．P63蛋白在低分化腺癌组织中表达率明显高于高中分化腺癌(X2=7．36,P<0．05);在胃窦／胃角腺癌与胃底／胃体腺癌之间、在弥漫型与肠型胃腺癌之间、在Ⅰ,Ⅱ期胃腺癌与Ⅲ,Ⅳ期腺癌之间均无显著差异．P73蛋白在Ⅰ,Ⅱ期胃腺癌组织中的阳性表达率明显低于Ⅲ,Ⅳ期腺癌(X2=4．14,P<0．05),在胃窦／胃角腺癌与胃底／胃体腺癌之间、在弥漫型与肠型胃腺癌之间、在高、中及低分化胃腺癌之间均无显著差异．在P53蛋白阳性与阴性表达的胃腺癌之间,P63和P73蛋白阳性表达率的差异无显著性．结论:P53,P63和P73过度表达与胃腺癌的发生相关联,但并无交互作用．     

P16和CyclinD1在不同胃病患者胃粘膜中表达的临床意义

为探讨多瘤抑制基因P^16和细胞周期素D1（CyclinD1)在正常胃、慢性胃炎、不典型增生及胃癌中的表达，以及其与胃癌发生、发展及临床、病理参数的关系，采用mRNA原位杂交技术检测了P^16CyclinD1在不同胃粘膜病变中的表达情况。结果显示，正常胃粘膜P^16阳性率为90．9％，CyclinD1为阴性、浅表性胃炎、萎缩性胃炎、不典型增生、胃癌的P^16阳性率分别为87．1％、78．6％、37．5％、26．25％，CyclinD1的阳性率依次为16％、21％、56％、73．75％，癌组织与正常胃粘膜比较有显著性差异。P^16的阳性率与肿瘤恶性程度呈负相关，CyclinD1与癌分化无明显相关性。胃癌有淋巴结转移者的P^16阳性率低于无淋巴结转移者（P＜0．01）。CyclinD1明显高于无淋巴结转移者。随访2年，80例胃癌患者中13例死亡，均为P^16阴性、CyclinD1阳性者。胃癌中P^16与CyclinD1两种基因变化与胃癌的形成关系密切；随病变加重，P^16缺失率增加，CyclinD1阳性率增加，两者可单独或协同促进胃癌的发生、发展。其反向表达趋势提示两者可能存在相互抑制机制。多基因异常病例易发生淋巴结及远处转移，预后差。     

胃腺癌组织中P53、Ki-67的表达及其临床意义

目的研究P53和Ki-67在胃腺癌中表达阳性率,并探讨他们与临床病理指标的关系。方法收集2009年1月至2011年6月吉林大学第一医院经术后病理证实为胃腺癌的住院患者290例,全部病例均于我院病理科采用EliVision Plus免疫组织化学染色方法检测胃腺癌中P53和Ki-67的蛋白表达。结果 290例胃腺癌中P53和Ki-67蛋白表达的阳性表达率分别为46.9%(136/290)和78.6%(228/290)。P53和Ki-67蛋白阳性表达,在Lauren分型中,肠型显著高于弥漫型和混合型(均P<0.05);在Borrmannan分型中,0/Ⅰ/Ⅱ显著高于Ⅲ/Ⅳ(均P<0.05);高、中分化组显著高于低、未分化组(均P<0.05)。P53蛋白阳性表达,在贲门、胃底部显著高于胃体、胃窦、胃角部(均P<0.05);无远处转移组显著高于有远处转移组(均P<0.05)。Ki-67蛋白阳性表达,在T2～T4组显著高于Tis、T1组(均P<0.05);有淋巴结转移组显著高于无淋巴结转移组(均P<0.05)。非参数Spearman等级相关分析显示:P53和Ki-67呈正相关(r=0.292,P<0.05)。结论胃腺癌中P53及Ki-67的表达与临床病理指标有一定的相关性,联合检验可作为评估胃癌恶性程度及预后的参考指标。     

P16、cerbB-2蛋自在胃肿瘤中的表达及意义

目的探讨p16、cerbB-2蛋白在胃肿瘤中的表达及发生中的作用.方法应用免疫组化S-P法检测胃正常黏膜、腺瘤及腺癌中p16、cerbB-2蛋白的表达.结果p16蛋白在腺癌和腺瘤中表达明显低于正常黏膜(P<0.001,P<0.001);腺瘤组与腺癌组之间无显著性差异(P＞0.05);低分化腺癌组、有淋巴结转移组p16蛋白表达明显低于高分化腺癌组、无淋巴结转移组(f＜.05,P<0.001),5a死亡组明显低于存活组(P<0.01).cerbB-2蛋白在腺癌、腺瘤中表达明显高于正常黏膜(P<0.001,P<0.001).腺癌中p16蛋白低表达与CerbB-2蛋白高表达呈负相关性(r,=-0.4984,P<0.001).结论p16、cerbB-2基因的缺失和蛋白的异常表达在胃腺癌的发生、发展中起着重要的作用,对判断其预后具有重要的价值.     

食管鳞癌组织中Bmi-1、P16和CyclinD1的表达及临床意义

目的研究Bmi-1、P16和Cyclin D1在食管鳞癌中的表达及其临床意义。方法应用免疫组化Eli Vision两步法检测100例食管鳞癌和30例正常食管黏膜组织中Bmi-1、P16和Cyclin D1的表达。结果 1在食管鳞癌和正常食管组织中,Bmi-1、P16、Cyclin D1阳性率差异显著(P0.05)。2Bmi-1的表达程度与分化程度、淋巴结转移和临床分期密切相关,P16的表达程度与淋巴结转移和临床分期密切相关,Cyclin D1的表达程度与浸润深度密切相关(P0.05)。3Bmi-1和Cyclin D1的表达与P16的表达均呈负相关(P0.05)。结论 Bmi-1、P16和Cyclin D1的异常表达参与食管鳞癌的发生、发展,联合检测Bmi-1、P16和Cyclin D1的表达可作为食管鳞癌早期诊断和治疗的参考指标。     

细胞周期素D1及P16蛋白表达与肺癌临床病理特征的关系

目的　研究细胞周期素D1(CyclinD1)及P16蛋白在肺癌中的表达及其与肺癌临床病理特征的关系。方法　应用免疫组化SP法对 5 9例肺癌组织及 47例癌旁肺组织中CyclinD1及P16蛋白进行检测。结果　CyclinD1在肺癌组织中阳性表达率为 61.0 % (3 6/ 5 9) ,显著高于癌旁肺组织 (17.0 % ,8/ 47) ,P <0 .0 1;而P16蛋白在肺癌中阳性表达率 (4 0 .7% ,2 4/ 5 9)低于癌旁肺组织 (76.6% ,3 6/ 47) ,P <0 .0 1。肺癌组织CyclinD1及P16蛋白表达与患者年龄、性别、肿瘤组织学类型、分期及淋巴结转移等均无明显相关 (P >0 .0 5 ) ,与肿瘤分化程度有显著相关性 ,肺癌中CyclinD1与P16蛋白表达呈显著负相关 (r =-0 .763 ,P <0 .0 1)。结论　CyclinD1过表达及P16表达缺失与肺癌的发生密切相关。CyclinD1和P16蛋白异常表达可能是肺癌发生过程中的早期事件 ,可作为判断肺癌分化程度的参考指标 ,具有早期诊断价值     

Wnt信号通路的组件蛋白DKK-1、β-链接素及周期素D1蛋白表达与胃癌的相关性

目的探讨Wnt信号通路中的组件蛋白DKK-1、β-catenin及周期素(Cyclin)D1在胃癌的发生、发展及转移的相互关系。方法采用免疫组织化学方法标记DKK-1、β-catenin及Cyclin D1蛋白在80例胃癌组织标本,10例正常胃组织中的表达情况。结果 1DKK-1在胃癌组织中的表达明显低于胃正常组织(P0.05),高、中分化胃癌的表达高于低分化胃癌的表达(P0.05),伴有淋巴结转移的胃癌组织DKK-1较无转移病例阳性率低(P0.05)。2β-catenin在胃癌组织中的阳性表达率明显高于胃正常组织(P0.05),高、中分化胃癌的表达低于低分化胃癌的表达(P0.05),伴有淋巴结转移的胃癌组织β-catenin较无转移病例阳性率高(P0.05)。3Cyclin D1在胃癌组织中的表达明显高于胃正常组织(P0.05),高、中分化胃癌的表达低于低分化胃癌的表达(P0.05),伴有淋巴结转移的胃癌组织Cyclin D1较无转移病例阳性率较高(P0.05)。4在胃癌组织中DKK-1与Cyclin D1呈负相关关系(r=-0.453,P0.01),DKK-1与β-catenin呈负相关关系(r=-0.553,P0.01),Cyclin D1与β-catenin呈正相关关系(r=0.562,P0.05)。结论 Wnt信号通路中的组件蛋白DKK-1、β-catenin及Cyclin D1在胃癌的发生、发展及转移有一定的相互关系。     

胃癌组织P16，P53蛋白和增殖细胞核抗原的表达意义

目的探讨Ｐ１６,Ｐ５３蛋白和增殖细胞核抗原（ｐｒｏｌｉｆｅｒａｔｉｎｇｃｅｌｎｕｃｌｅａｒａｎｔｉｇｅｎ,ＰＣＮＡ）在胃癌的发生、发展中的作用及临床意义．方法应用免疫组织化学方法,对７７例胃癌和癌旁粘膜组织、２１例胃正常组织中Ｐ１６,Ｐ５３蛋白表达产物和ＰＣＮＡ进行检测,并结合临床资料进行分析．结果胃癌组织中Ｐ１６蛋白的阳性率为２０８％（１６／７７）,明显低于癌旁粘膜组织５９７％（４６／７７）和胃正常组织９０５％（１９／２１,Ｐ＜００５）;Ｐ５３蛋白与ＰＣＮＡ在胃癌组织中的阳性率为８０５％（６２／７７）和９２２％（７１／７７）,明显高于癌旁粘膜组织４１６％（３２／７７）,６４９％（５０／７７）和胃正常组织００％（０／２１,Ｐ＜００５）．Ｐ１６,Ｐ５３蛋白和ＰＣＮＡ阳性表达与胃癌组织学类型、浸润深度、分化程度及淋巴结转移有显著性差异（Ｐ＜００５）,与患者年龄、性别、肿瘤大小及部位无关（Ｐ＞００１）．结论Ｐ１６,Ｐ５３蛋白和ＰＣＮＡ的异常表达对胃癌的发生发展、恶性程度、淋巴结转移及预后有密切关系和重要临床意义．     

Expression, deleton and mutation of p16 gene in human gastric cancer

AIM To investigate the relationship between the expression of p16 gene and the gastric carcinogenesis,depth of invasion and lymph node metastases, and to evaluate the deletion and mutation of exon 2 in p16 gene in gastric carcinoma. METHODS The expression of P16 protein was examined by streptavidin-peroxidase conjugated method (S-P); the deletion and mutation of p16 gene were respectively examined by polymerase chain reaction (PCR) and polymerase chain reaction single-strand conformation polymorphism analysis (PCR-SSCP) in gastric carcinoma. RESULTS Expression of P16 protein was detected in 96.25% (77/80) of the normal gastric mucosa, in 92.00% (45/50) of the dysplastic gastric mucosa and in 47.54% (58/122) of the gastric carcinoma. The positive rate of P16 protein expression in gastric carcinoma was significantly lower than that in normal gastric mucosa and dysplastic gastric mucosa (P＜0.05). The positive rate of P16 protein expression in mucoid carcinoma 10.00% (1/ 10) was significantly lower than that in poorly differentiated carcinoma 51.22% ( 21/ 41 ),undifferentiated carcinoma 57.69% (15/26) and signet ring cell carcinoma 62.50% (10/ 16) (P＜0.05). The positive rate of p16 protein in 30 cases paired primary and lymph node metastatic gastric carcinoma: There was 46.67% (14/30) in primary gastric carcinoma, 16.67% (5/30) in lymph node metastatic gastric carcinoma. The positive rate of lymph node metastatic carcinoma was significantly lower than that of primary carcinoma (P＜0.05). There was of p16 gene mutation in exon 2, but 5 cases displayed deletion of p16 gene in exon 2 in the 25 primary gastric carcinomas. CONCLUSIONS The expression loss of P16 protein related to the gastric carcinogenesis, gastric carcinoma histopathological subtypes and lymph metastasis. The mutation of p16 gene in exon 2 may not be involved in gastric carcinogenesis. But the deletion of p16 gene in exon 2 may be involved in gastric carcinogenesis.     

Expression, deletion [was deleton] and mutation of p16 gene in human gastric cancer

AIM: To investigate the relationship between the expression of p16 gene and the gastric carcinogenesis, depth of invasion and lymph node metastases, and to evaluate the deletion and mutation of exon 2 in p16 gene in gastric carcinoma. METHODS: The expression of p16 protein was examined by streptavidin-peroxidase conjugated method (S-P);the deletion and mutation of p16 gene were respectively examined by polymerase chain reaction (PCR) and polymerase chain reaction single-strand conformation polymorphism analysis (PCR-SSCP) in gastric carcinoma. RESULTS: Expression of p16 protein was detected in 96.25% (77/80) of the normal gastric mucosa, in 92.00% (45/50) of the dysplastic gastric mucosa and in 47.54% (58/122) of the gastric carcinoma. The positive rate of p16 protein expression in gastric carcinoma was significantly lower than that in normal gastric mucosa and dysplastic gastric mucosa (P < 0.05). The positive rate of p16 protein expression in mucoid carcinoma 10.00% (1/10) was significantly lower than that in poorly differentiated carcinoma 51.22% (21/41), undifferentiated carcinoma 57.69% (15/26) and signet ring cell carcinoma 62.50% (10/16) (P < 0.05). The positive rate of p16 protein in 30 cases paired primary and lymph node metastatic gastric carcinoma: There was 46.67% (14/30) in primary gastric carcinoma, 16.67% (5/30) in lymph node metastatic gastric carcinoma. The positive rate of lymph node metastatic carcinoma was significantly lower than that of primary carcinoma (P < 0.05). There was of p16 gene mutation in exon 2, but 5 cases displayed deletion of p16 gene in exon 2 in the 25 primary gastric carcinomas. CONCLUSIONS: The expression loss of p16 protein related to the gastric carcinogenesis, gastric carcinoma histopathological subtypes and lymph metastasis. The mutation of p16 gene in exon 2 may not be involved in gastric carcinogenesis. But the deletion of p16 gene in exon 2 may be involved in gastric carcinogenesis.     

胃癌组织中P27表达与cyclin D1、cyclin E表达的相关性

目的:检测胃癌组织中P27的表达及其与cyclin D_1、cyclin E表达的相关性,并探讨其意义.方法:临床病理资料齐全的胃癌蜡块标本54例,正常胃黏膜标本15例,采用SP免疫组化方法检测P27、cyclin D和cyclin E在其中的表达.结果:胃癌组织54例中有20例P27表达阳性(37.0%),正常胃组织中15例有11例P27呈阳性表达(73.3%),胃癌组织与正常胃组织相比,P27的表达有明显差异(P<0.05),胃癌组织中P27的表达与患者的性别、年龄及肿瘤大小,浸润深度,分化程度无相关性(P>0.05),而与TNM分期及有无淋巴结转移明显相关(P<0.05),P27的表达与cyclin D_1的表达呈负相关(r=-0.332),而与cyclin E的表达无明显相关性(p>0.05).结论:胃癌组织中P27表达与正常胃组织有显著差异,胃癌组织中P27蛋白表达与淋巴结转移及临床分期密切相关,与cyclin E的表达呈负相关.     

慢性萎缩性胃炎黏膜上皮中P53和C-erbB-2表达的临床意义

目的:探讨慢性萎缩性胃炎(CAG)黏膜上皮中P53及C-erbB-2的表达及意义．方法:用免疫组化技术(SP法)检测正常胃黏膜56例、慢性萎缩性胃炎429例(腺体囊性扩张61例,大肠型化生73例,轻、中、重度不典型增生各120、91和84例)和早期胃癌57例中P53和C-erbB-2的表达,分析P53和C-erbB-2表达及其与CAG胃黏膜病变类型的关系．结果:正常胃黏膜,囊性扩张腺体,轻、中度不典型增生,大肠型化生,重度不典型增生,早期胃癌P53和C-erbB-2表达的阳性率呈上升趋势．前三组间表达率差异无统计学意义(P>0．05);正常胃黏膜与中度不典型增生、大肠型化生、重度不典型增生及胃癌组P53和C-erbB-2的表达差异有统计学意义(P<0．01)．Spearman等级相关分析显示P53和C-efbB-2表达呈正相关(r=0．867,P<0．05)．年龄<40岁和≥40岁组间、性别组间P53表达阳性率差异有统计学意义(x2=12．393,P<0．01;x2=8．799, P<0．01)．C-erbB-2的表达在上述年龄组间差异有统计学意义(x2=7．706,P<0．01),而在性别组间无统计学意义(P>0．05)．结论:检测慢性萎缩性胃炎中P53和C-erbB-2的表达,有助于监测CAG癌前病变的进展及胃癌的早期发现．     

Multiple genetic alterations and behavior of cellular biology in gastric cancer and other gastric mucosal lesions:H.pylori infection, histological types and staging

AIM:To investigate the expression of multiple genes and the behavior of cellular biology in gastric cancer (GC) and other gastric mucosal lesions and their relations to Helicobacter pylori (H. pylori) infection, tumor staging and histological subtypes.METHODS:Three hundred and twenty seven specimens of gastric mucosa obtained via endoscopy or surgical resection, and ABC immunohistochemical staining were used to detect the expression of p53, p16, Bcl-2 and COX-2 proteins.H. pylori was determined by rapid urea test combined with patholo-gical staining or 14 Curea breath test. Cellular image analysis was performed in 66 patients with intestinal metaplasia (IM) and/or dysplasia (Dys). In 30 of them, both cancer and the paracancerous tissues were obtained at the time of surgery. Histolo-gical pattern, tumor staging, lymph node metastasis, grading of differentiation and other clinical data were studied in the medical records.RESULTS:p16 expression of IM or Dys was significantly lower in positive H. pylori chronic atrophic gastritis (CAG) than those with negative H. pylori (CAG: 54.8% vs 88.0%, IM:34.4% vs 69.6%, Dys: 23.8% vs 53.6%, all P < 0.05), Bcl-2 or COX-2 expression of IM or Dys in positive H. pylori cases was signi-ficantly higher than that without H. pylori (Bcl-2: 68.8% vs 23.9%, 90.5% vs 60.7%; COX-2: 50.0% vs 10.8%, 61.8% vs 17.8%; all P <0.05). The mean number of most parame-ters of cellular image analysis in positive H. pylori group was significantly higher than that in negative H. pylori group (Ellipser: 53 plus minus 14, 40 plus minus 12&mgr;m, Area(1): 748 plus minus 572, 302 plus minus 202&mgr;m(2), Area(2): 3050 plus minus 1661, 1681 plus minus 1990&mgr;m(2), all P< 0.05; Ellipseb: 79 plus minus 23, 58 plus minus 15&mgr;m, Ratio-1: 22% plus minus5%,13% plus minus4%,Ratio-2:79% plus minus17%,53% plus minus20%,all P<0.01). There was significant correl-ation between Bcl-2 and histologic pattern of gastric carcinoma, and between COX-2 and tumor staging or lymph node metasta sis (Bcl-2: 75.0% vs16.7%; COX-2: 76.0% vs 20.0%, 79.2% vs 16.7%; all P< 0.05).CONCLUSION:p16, Bcl-2, and COX-2 but not p53 gene may play a role in the early genesis/progression of gastric carcinoma and are associated with H. pylori infection. p53 gene is relatively late event in gastric tumorigenesis and mainly relates to its progression. There is more cellular-biological behavior of malignant tumor in gastric mucosal lesions with H. pylori infec-tion. Aberrant Bcl-2 protein expression appears to be preferentially associated with the intestinal type cancer. COX-2 seems to be related to tumor staging and lymph node metastasis.     

不同类型胃息肉及胃癌中环氧化酶-2和P16蛋白的表达及相关性

目的:研究不同类型胃息肉及胃癌中COX-2(环氧化酶-2)和P16蛋白的表达,探讨COX-2、P16蛋白在胃癌发生、发展中的作用及其相互关系.方法:采用S-P免疫组织化学方法检测10例正常胃黏膜,30例非肿瘤性胃息肉(炎性及增生性胃息肉),20例肿瘤性胃息肉(腺瘤性胃息肉)和40例胃癌组织中,COX-2和P16蛋白的表达情况.结果:COX-2表达,在正常胃黏膜、非肿瘤性胃息肉、肿瘤性胃息肉及胃癌中分别为10%,13.33%,45%,75%,胃癌组阳性率与其他三组差异有显著性(P<0.05);P16蛋白表达,在正常胃黏膜、非肿瘤性胃息肉、肿瘤性胃息肉及胃癌中分别为90%,86.67%,60%,32.5%,胃癌组阳性率与其他三组差异有显著性(P<0.05).COX-2、P16蛋白表达与胃癌分化程度、淋巴结转移、呈一定相关性.COX-2与P16蛋白的表达呈负性相关(P<0.05).结论:COX-2、P16蛋白在胃癌发生、发展中起一定作用,可作为判定胃癌生物学行为的有用指标.     

细胞增殖与凋亡在十二指肠胃反流患者胃黏膜病变进展中的变化

目的探讨细胞增殖与凋亡在原发性十二指肠胃反流（DGR）患者胃黏膜病变的发生发展中的作用。方法对58例原发性病理性DGR患者进行24h胃内胆汁监测,并行胃镜检查及胃黏膜活检,采用免疫组化方法分析不同病变胃黏膜组织Ki-67、Bcl-2蛋白的表达,采用TUNEL技术观察胃黏膜细胞凋亡情况。结果1．原发性病理性DGR患者胃黏膜上皮细胞增殖指数（PI）和凋亡指数（AI）均显著高于正常对照组（P〈0．05）,高反流组PI、AI均高于低反流组（P〈0．05）;2．高反流组胃窦部萎缩性胃炎的检出率高于低反流组（P〈0．05）;3．在正常胃黏膜→浅表性胃炎→萎缩性胃炎→肠上皮化生发展过程中,PI、AI均逐渐升高且呈一致性升高。在发生异型增生时PI仍显著增加而AI显著下降。4．呈异型增生的患者胃黏膜上皮细胞Ki-67表达阳性率显著升高（P〈0．05）,呈异型增生的患者胃黏膜上皮细胞Bcl-2阳性率高于其它各组（P〈0．05）。结论细胞增殖与凋亡失调可能在十二指肠反流液造成胃黏膜病变的进展中发挥重要作用,Ki-67、Bcl-2蛋白表达异常可能是DGR患者胃黏膜损伤及癌变的分子机制之一。     

胃癌组织中Raf激酶抑制蛋白的表达临床意义

目的 探讨Raf激酶抑制蛋白(RKIP)在胃癌中的差异表达及临床意义.方法 采用激光捕获显微切割技术(LCM)获得12例纯化的胃腺癌细胞(GAC)及其癌旁(＞5 cm)胃黏膜上皮细胞(NGEC),应用18O/16O分别标记两种细胞样本酶切后的多肽混合物.结合纳升级液相色谱定量鉴定GAC和NGEC的差异表达蛋白质.免疫印迹法验证差异蛋白RKIP在胃癌中的表达.免疫组化检测RKIP蛋白在胃癌组织(118例)、癌旁胃黏膜组织(70例)、转移的淋巴结组织(35例)的表达.结果 共筛选出78个差异表达蛋白质,其中RKIP蛋白表达水平在GAC中较NGEC明显下调(1:4.37).免疫组化结果显示,RKIP蛋白表达与胃癌的浸润深度、TNM分期及淋巴结转移呈负相关,与分化程度呈正相关(P＜0.05).结论 胃癌组织中RKIP蛋白低表达可能影响胃癌的生物学行为.     

Expression of ornithine decarboxylase in precancerous and cancerous gastric lesions

AIM: To investigate the expression of ornithine decarboxylase (ODC) in precancerous and cancerous gastric lesions. METHODS: We studied the expression of ODC in gastric mucosa from patients with chronic superficial gastritis (CSG,n = 32),chronic atrophic gastritis CAG,n = 43; 15 with and 28 without intestinal metaplasia (IM),gastric dysplasia (DYS,n = 11) and gastric cancer (GC,n = 48) tissues using immunohistochemical staining. All 134 biopsy specimens of gastric mucosa were collected by gastroscopy. METHODS: The positive rate of ODC expression was 34.4%,42.9%,73.3%,81.8% and 91.7% in cases with CSG,CAG without IM,CAG with IM,DYS and GC,respectively (P < 0.01),The positive rate of ODC expression increased in the order of CSG < CAG (without IM) < CAG (with IM) < DYS and finally,GC. In addition,ODC positive immunostaining rate was lower in well-differentiated GC than in poorly-differentiated GC (P < 0.05). CONCLUSION: The expression of ODC is positively correlated with the degree of malignity of gastric mucosa and development of gastric lesions. This finding indicates that ODC may be used as a good biomarker in the screening and diagnosis of precancerous lesions.