周期素E表达在粘膜下胃癌进展中的作用

周期素Ｅ(ＣｙｃｌｉｎＥ)是一种Ｇ1期核蛋白 ,它能结合并激活周期素依赖激酶 2 (ｃｙｃｌｉｎ ｄｅｐｅｎｄｅｎｔｋｉｎａｓｅｓ,ＣＤＫ2 )而间接促进细胞从Ｇ1向Ｓ期过渡。ｐ5 3通过激活 ｐ2 1蛋白而间接抑制细胞从Ｇ1向Ｓ期过渡。故ＣｙｃｌｉｎＥ与ｐ5 3的异常将使Ｇ1/Ｓ期的调控失常 ,有可能引起无限制地细胞增殖 ,进而参与多种肿瘤的发生和发展[1] 。ＣｙｃｌｉｎＥ在基因和蛋白水平的过度表达[2 ] 及其在癌中的高发生率证实ＣｙｃｌｉｎＥ也参与和促进了胃癌的发生。本文旨在探讨ＣｙｃｌｉｎＥ的过度表达在粘膜下胃癌进展中的作用…     

原发性肝细胞癌中cyclinD1基因表达的研究

目的　研究ｃｙｃｌｉｎＤ１ 基因在原发性肝细胞癌中的表达，并探讨与ｐ１６ 及ＣＤＫ４ 蛋白表达的关系。方法　用原位杂交检测ｃｙｃｌｉｎＤ１ 基因ｍＲＮＡ 表达，免疫组化检测ｃｙｃｌｉｎＤ１ 蛋白表达。结果　４ 例（１４－３ ％ ） ＨＣＣ 可检测到ｃｙｃｌｉｎＤ１ 基因过表达。均属ⅢⅣ级，４ 例ＨＣＣ 均有ＣＤＫ４ 蛋白表达，其中２ 例为ｐ１６ 蛋白阳性。结论　１）ｃｙｃｌｉｎＤ１ 表达增加只在小部分恶性程度高的ＨＣＣ 中起作用，可能与肿瘤侵袭有关。２） 在ＨＣＣ 中，ｃｙｃｌｉｎＤ１ 基因过表达和／ 或ｐ１６ 蛋白丢失均起重要作用     

早期胃癌cyclin E表达的生物学意义

目的研究早期胃癌ｃｙｃｌｉｎＥ表达的生物学意义．方法用免疫组化法检测１０８例早期胃癌组织中ｃｙｃｌｉｎＥ和Ｐ５３的表达．结果正常胃腺体细胞几乎不染色,３３％（３６／１０８）的胃癌呈棕黄色．ＣｙｃｌｉｎＥ的总阳性率,在幽门部为４８％（２４／５０）,肉眼观混合型４６％（６／１３）,组织学分化型４０％（３１／７８）,Ｐ５３阳性者５４％（１９／３５）,均显著高于对照组．ＣｙｃｌｉｎＥ的强阳性率,在癌侵入粘膜下者是１８％（９／５１）,侵入静脉者２８％（５／１８）,侵入淋巴管者２８％（９／３２）,侵入淋巴结者３０％（４／１３）,都显著高于对照组．ＣｙｃｌｉｎＥ强阳性者五年生存率４０％（４／１０）,显著低下．结论ＣｙｃｌｉｎＥ阳性尤其是强阳性者恶性程度高     

p53 C-myc和P-gp蛋白在胃癌细胞中表达

目的研究胃癌组织中ｐ５３和Ｃｍｙｃ的表达与多药耐药性（ＭＤＲ）的关系．方法应用ＬＳＡＢ免疫组织化学方法研究６７例（男４１例，女２６例，平均年龄４６±１５８岁）胃癌标本中ｐ５３，Ｃｍｙｃ和Ｐｇｐ的表达．结果本组胃癌中ｐ５３阳性３２例（４７８％），Ｃｍｙｃ阳性３７例（５５２％），Ｐｇｐ阳性３９例（５８２％）．淋巴结转移阳性胃癌ｐ５３阳性率（５６９％）和Ｃｍｙｃ阳性率（６４７％）显著高于淋巴结转移阴性的胃癌（Ｐ＜００５）．ｐ５３的异常表达与ｍｄｒ１基因表达呈显著正相关（ｒ＝０６３，Ｐ＜００５），而Ｃｍｙｃ和ｍｄｒ１的表达无明显相关．结论ｐ５３异常表达可增加ｍｄｒ１基因的表达，从而使胃癌细胞获得ＭＤＲ表型     

C-myc,Bcl-2与胃癌生物学行为和细胞凋亡

目的探讨癌基因Ｂｃｌ２，Ｃｍｙｃ的表达变化与胃癌生物学行为和细胞凋亡的关系．方法采用免疫组化ＬＳＡＢ法，检测６０例原发性胃癌组织（男３８例，女２２例，年龄３７岁～７５岁）癌基因Ｂｃｌ２，Ｃｍｙｃ蛋白的表达变化；在普通光学显微镜下对受检组织的ＨＥ片进行形态学测量和凋亡细胞计数．结果受检组织６０例中，Ｃｍｙｃ阳性表达３７例（６２％），其表达与分化程度和临床分期呈显著性相关，且Ｃｍｙｃ阳性组织细胞凋亡指数（０７±０３）明显高于阴性组织（０３±０２）；所检标本中，Ｂｃｌ２阳性表达率为６８％（４１／６０），其中高分化胃癌的阳性表达率明显高于低分化胃癌（３２％ｖｓ９％）（Ｐ＜００５），阳性Ｂｃｌ２组织与阴性Ｂｃｌ２组织比较，前者凋亡指数明显低于后者（０４±０３ｖｓ０９±０５）（Ｐ＜００５）．结论Ｃｍｙｃ与Ｂｃｌ２基因的异常表达是胃癌生物学行为的重要影响因素，二者在胃癌形成过程中均起着一定的作用，并对细胞增生与凋亡有重要调节作用．     

大肠癌及癌旁内分泌细胞的表达意义

目的探讨内分泌细胞（ＥＣ）在大肠癌及癌旁的表达意义．方法应用ＬＳＡＢ免疫组化法，对１１７例大肠癌及８５例癌旁粘膜中嗜铬蛋白Ａ（ＣＧＡ）及几种激素进行检测，１３例大肠癌行电镜观察．结果ＥＣ阳性大肠癌４６例（３９３％），检测到一种以上激素６９２％（２７／３９），癌旁粘膜ＥＣ数高于正常肠粘膜．电镜观察８例有含内分泌颗粒的癌性ＥＣ．在中低分化癌中ＥＣ（＋＋）的表达（２５５％）高于高分化癌（６９％）（χ２＝７５４，Ｐ＜００５），含有ＥＣ的大肠癌淋巴结转移的发生率（６８０％）高于不含ＥＣ者（４３７％）（χ２＝６２３，Ｐ＜００５），且预后不良；５ＨＴ，βＨＣＧ，Ｇｌｕ，Ｇａｓ阳性癌分化及预后较差（Ｐ＞００５）．结论含ＥＣ的大肠癌具有更恶性的生物学行为，可能与ＥＣ中某些激素，通过旁分泌等途径促进肿瘤的生长转移有关，癌旁ＥＣ增生与周围肿瘤生长有关．     

大肠癌患者检测P16和Cyclin D1的临床意义

采用原位杂交技术检测正常大肠粘膜、息肉及癌组织中Ｐ１６、细胞周期素Ｄ_１、（Ｃｙｃｌｉｎ　Ｄ_１）的表达情况,并结合临床资料进行分析。结果显示,Ｐ１６在正常大肠粘膜中的阳性表达率最高,息肉组织次之,癌组织最低;癌组织与正常大肠粘膜和息肉组织比较差异显著（Ｐ＜０．００５）。对大肠癌患者术后随访２年发现,其死亡与存活者的Ｐ１６和Ｃｙｃｌｉｎ　Ｄ_１亦有明显差异（Ｐ＜０．０１）。正常大肠粘膜和炎性息肉组织未发现Ｃｙｃｌｉｎ　Ｄ１过度表达,腺瘤样息肉表达率为７．７％,癌组织表达率大于６５％,与正常大肠粘膜和息肉组织比较差异显著（Ｐ＜０．００５）。相关性分析显示,Ｐ~(１６)、Ｃｙｃｌｉｎ　Ｄ_１在大肠粘膜组织中多数呈反向表达。提示Ｐ~(１６)、Ｃｙｃｌｉｎ　Ｄ_１在大肠癌发生过程中起重要的作用,其反向表达趋势说明可能存在相互抑制机制。     

胃癌及癌前病变组织中c_erbB_2癌基因产物的表达

目的探讨ｃｅｒｂＢ２癌基因产物的表达与胃癌发生及胃癌生物学行为的关系．方法应用抗ｃｅｒｂＢ２癌基因蛋白（Ｐ１８５）的单克隆抗体，采用免疫组化ＡＢＣ方法对正常胃粘膜（ｎ＝９）、各级胃粘膜异型增生（轻度ｎ＝１０，中度ｎ＝６，重度ｎ＝７）、早期胃癌（ｎ＝１８）及进展期胃癌（ｎ＝３０）进行研究，并与胃癌类型、大小、有无淋巴结转移等作了比较分析．结果正常胃粘膜为阴性，仅在腺体颈部偶见Ｐ１８５蛋白的弱阳性表达．在异型增生病变中则有较高的表达率，并随异型增生程度的增加，表达率逐渐升高，轻、中、重度异型增生表达率分别为５０％，８３３％，８５７％．Ｐ１８５蛋白在早期及进展期胃癌中的表达率分别为２２２％和５６７％．重度异型增生表达率显著高于早期胃癌（Ｐ＜００５），进展期胃癌表达率显著高于早期胃癌（Ｐ＜００５），淋巴结转移组的表达率高于淋巴结未转移组（５９３％ｖｓ２３８％，Ｐ＜００５），但Ｐ１８５蛋白的表达与胃癌组织学类型及胃癌肿块大小无相关性（Ｐ＞００５）．结论ｃｅｒｂＢ２癌基因有可能参与正常胃粘膜的增殖、修复及癌变过程，Ｐ１８５蛋白阳性的肿瘤可能具有更强的浸润及转移能力．     

Cyclin D1和pRb在胃癌的的表达及其临床意义

应用免疫组织化学技术检测ＣｙｃｌｉｎＤ１和ｐＲｂ在胃癌及其癌旁粘膜中的表达,探讨其在胃癌的发生和发展中所起的作用１材料和方法１．１材料共选取胃癌手术切除标本５７例,经１０％中性福尔马林液固定,常规脱水,石蜡包埋．１．２方法应用免疫组织化学ＡＢＣ（ＡｖｉｄｉｎＢｉｏｔｉｎＣｏｐｌｅｘ）法,ｃｙｃｌｉｎＤ１小鼠单抗ＤＣＳ－６购自美国Ｎｅｏｍａｒｋｅｒ公司,Ｒｂ小鼠单抗购自美国Ｚｙｍｅｄ公司,ＡＢＣ试剂购自美国Ｖｅｃｔｏｒ公司,微波进行抗原修复２结果２．１ＣｙｃｌｉｎＤ１和ｐＲｂ在胃癌、不典型增生和胃…     

福建肝癌细胞EBV感染与HBV及P53蛋白表达的关系

目的探讨肝细胞癌（ＨＣＣ）中ＥＢＶ与ＨＢＶ感染的相关性及ＥＢＶ与Ｐ５３蛋白表达的关系．方法采用原位杂交技术以地高辛标记的单链ｃＤＮＡ探针、生物素标记的双链ｃＤＮＡ探针及免疫组化ＳＰ法检测ＨＣＣ５９例（含癌旁肝组织）和９例肝硬变组织中高拷贝数ＥＢＥＲ１（ＥＢＶ编码的小ＲＮＡ）、ＨＢＶＤＮＡ和Ｐ５３蛋白．结果肝癌细胞核内ＥＢＥＲ１阳性率为２０３％,显著高于癌旁肝组织（Ｐ＜００１）．肝癌组织内ＨＢＶＤＮＡ阳性率为５９３％,ＥＢＶ存在与ＨＢＶ感染无明显相关性（Ｐ＞００５）．肝癌组织内Ｐ５３蛋白表达率为３３９％,Ｐ５３表达与ＥＢＥＲ１无显著关系（Ｐ＞００５）．结论肝癌细胞内ＥＢＶ感染与ＨＢＶ存在无明显关系,肝癌中Ｐ５３表达与ＥＢＥＲ１无关     

Cyclin Gl、Mdm2和P53在胃癌组织中的表达及相关性研究

目的探讨细胞周期蛋白G1(Cyclin G1)、鼠双微体基因(Mdm2)和P53在胃癌组织中的表达意义及相关性。方法采用免疫组织化学方法(SP法)检测54例胃癌组织中Cyclin G1、Mdm2和P53的表达,以20例正常胃黏膜组织作为对照。结果胃癌组织中Cyclin G1、Mdm2、P53的阳性表达率分别为62.96%、53.70%、44.44%,与正常组织对比,有显著性差异(P<0.05),Cy-clinGl、Mdm2的阳性表达率和表达强度与胃癌的分化程度相关。胃癌组织中Mdm2蛋白的表达与P53的表达呈正相关(r=0.307),而CyclinGl蛋白的表达与P53的表达无明显相关性。结论CyclinGl、Mdm2、P53的过表达在胃癌的发生、发展过程中起着重要的的作用。Mdm2可能是通过调控P53的活性而促进胃癌的发生、发展,Cyclin G1可能以不依赖P53的途径发挥作用。     

细胞周期蛋白在胃肠癌中的表达及临床意义

目的探讨细胞周期蛋白在胃肠癌中的表达及临床意义.方法用间接免疫荧光双标法在激光扫描共聚焦显微镜下检测33例胃肠癌患者手术标本和内窥镜活检组织标本中cyclin蛋白的表达及其差异.结果在手术切除标本或内镜活检组织标本中,四种cyclin在胃癌和大肠癌中的表达均有一定的阳性表达率,与正常胃肠黏膜相比,具有显著性差异(P＜0.05),而四种cy-clin在胃癌和大肠癌中的表达率差异则无显著性意义(P＞0.05).cyclin D1、cyclin E、cyclin A和cyclin B1在手术前后肿瘤组织中的表达差异均有显著性意义(P＜0.05).结论 cyclin蛋白在胃肠肿瘤的发生、发展中起重要作用.内镜活检组织cyclin的检测对胃肠肿瘤的早期发现有一定意义.     

Overexpression of cyclin B1 in gastric cancer and its clinicopathological significance: an immunohistological study

PURPOSE: Cyclin B1 is a key regulator of progression through the G2/M transition during the cell cycle. Although cyclin B1 proteins are overexpressed in various types of human cancers, the relationship between cyclin B1 status in gastric cancer and its clinical significance remains unknown. METHODS: We examined cyclin B1 expression by immunohistological means in 61 patients with gastric cancer in terms of histological type, tumor invasion, and metastatic behavior. Specimens were considered positive when the cytoplasm of over 10% of the cancer cell population was stained. RESULTS: Cyclin B1 was overexpressed in 32 (53%) of 61 patients with gastric cancer. Tumors that expressed cyclin B1 were predominant in older patients, in well- and moderately differentiated adenocarcinomas and in expanding-growth type tumors. Conversely, expression of cyclin B1 was lower in poorly differentiated adenocarcinomas, and in those of the infiltrative growth type. Moreover, the disease was more advanced (stages III and IV) and widespread nodal involvement was more frequent when cyclin B1 expression was low. Logistic regression analyses showed that histological type is a significant factor related to cyclin B1 protein expression. CONCLUSIONS: These findings suggested that cyclin B1 protein overexpression is closely associated with less aggressive tumor behavior. Therefore, G2/M cyclin alternatives and the possible role of cyclins in cancer development warrants further attention.     

细胞周期蛋白E、B1在胃肠癌中的表达及意义

目的 探讨细胞周期蛋白E、B1在胃肠癌中的表达及意义。方法 用间接免疫荧光双标法在激光扫描共聚焦显微镜下检测49例胃肠癌组织中cyclin E和cylcin Bl的表达。结果 胃肠癌中cyclin E和cylcin Bl的阳性表达率分别为48.9％和40.8％,正常组织未见表达,有显著性差异(P<0.05);cyclin E和cylcin Bl在胃肠癌中的表达与肿瘤的生长方式和分化程度相关,在膨胀性生长和高中分化肿瘤中的表达阳性率显著高于浸润性生长和低分化的肿瘤(P<0.05),cyclin Bl在有远处转移的胃肠癌中的表达阳性率显著高于无远处转移的肿瘤组织(P<0.05)。结论cyclin E和cyclin Bl在胃肠肿瘤的发生、发展中起重要作用。     

Alteration of cyclin D1 in gastric carcinoma and its clinicopathologic significance

AIM: To detect the genetic alteration and abnormal expression of cyclin D1 in gastric carcinoma and investigate its clinicopathologic significance in advanced gastric carcinoma. METHODS: Proteins of cyclin D1 were detected by immunohistochemistry in 42 cases of advanced gastric carcinoma with their follow-up data available, 27 cases of early stage carcinoma, 21 cases of gastric adenoma, 22 cases of hyperplastic polyp and 20 cases of normal mucosa adjacent to adenocarcinomas. Genetic alteration of cyclin D1 was detected by Southern blot and expression of cyclin D1 mRNA was detected by PT-PCR in 42 cases of advanced gastric carcinoma. RESULTS: Cyclin D1 protein was not expressed in normal mucosa, hyperplastic polyp and gastric adenoma, while it was only positively expressed in gastric carcinoma. The expression rate of cyclin D1 protein in early stage gastric carcinoma, advanced gastric carcinoma and lymph node metastasis was 48.1%, 47.4% and 50.0%, respectively. The amplification of cyclin D1 gene was detected in 16.6% of advanced gastric carcinomas. The overexpression of cyclin D1 mRNA was detected in 40.5% of the samples. There was no significant correlation between cyclin D1 protein expression and age, lymph-node metastasis and histological grading in patients with advanced gastric carcinoma (chi2 = 0.038, 0.059, 0.241, P>0.05). Significant correlation was observed between the expression of cyclin D1 protein and the 5-year survival rate (chi2 = 3.92, P<0.05). CONCLUSION: Detection of cyclin D1 protein by immunohistochemistry may be useful in the diagnosis of early gastric carcinomas. Patients with positive expression of cyclin D1 protein tend to have a worse prognosis.     

Immunohistochemical expression of cyclin E in endometrial adenocarcinoma (endometrioid type) and its clinicopathological significance

PURPOSE: Cyclin E is known as a G1-S phase regulatory protein and its abnormal expression has been implicated in cellular proliferation. This study aimed to investigate the correlation of cyclin E expression with tumorigenesis of the endometrium, proliferative activity, and clinicopathological features of endometrial adenocarcinoma. METHODS: Immunohistochemical staining for cyclin E in addition to cyclin-dependent kinase 2 (cdk2), Ki67, p27, and p53 was performed by the labeled streptavidin-biotin method on formalin-fixed, paraffin-embedded tissues of normal endometria (20 cases), endometrial hyperplasias (20 cases), and endometrial adenocarcinomas (endometrioid type) (127 cases). Positive staining was expressed as a labeling index (LI) based on percentages of positive nuclei in tumor cells. RESULTS: Immunohistochemistry showed that the nuclei of the cells were positive for cyclin E. Both proliferative and secretory endometria, and endometrial hyperplasia regardless of type were negligible for cyclin E expression. The expression in normal endometrium and hyperplasia was significantly less than that in endometrial adenocarcinomas (P<0.0001). LIs of cyclin E in well-differentiated, moderately differentiated, and poorly differentiated endometrial adenocarcinomas were 31.5+/-33.3%, 37.8+/-31.9%, and 51.1+/-30.8%, respectively. Cyclin E expression increased significantly more in histological grades. The LI of cyclin E in carcinoma was positively correlated with that of cdk2, Ki67, and p53 but not with p27. The cyclin E expression was correlated with myometrial invasion and lymph-vascular space involvement, but not with FIGO stage, lymph node metastasis, coexisting endometrial hyperplasia, estrogen receptor, progesterone receptor, and menopause. CONCLUSION: Cyclin E as a complex with cdk2 is associated with carcinogenesis and disease progression in endometrial adenocarcinoma, and might be a prognostic indicator of endometrial adenocarcinoma.     

Overexpression of cyclin E protein is closely related to the mutator phenotype of colorectal carcinoma

BACKGROUND AND AIMS: A subset of colorectal carcinomas are due to a deficiency in the DNA mismatch repair system. The molecular mechanisms of tumorigenesis in these tumors is not yet well understood. Deregulation of the cell cycle, specifically of the G(1) and S phases, is a hallmark of human cancers. Transition from the G(1) to the S phase is accelerated by increased cyclin E protein expression, and recent studies suggest that overexpression of cyclin E leads to chromosomal instability. The overexpression of cyclin E in a variety of human cancers, for example in colorectal, gastric, lung, breast, and kidney cancer, provides evidence that cyclin E plays a pivotal role in the cell cycle and replication. We examined whether the overexpression of cyclin E is related to the status of the mismatch repair system in colorectal carcinomas. PATIENTS AND METHODS: Frozen tumor samples and adjacent normal colon mucosa obtained from 100 patients were subjected to microsatellite analysis, RT-PCR, western blot analysis and immunohistochemistry. RESULTS: High microsatellite instability was detected in 13 tumors, and in 10 of these (77%) cyclin E protein was overexpressed at least twofold compared to normal mucosa. In contrast, only 28 of the remaining 87 microsatellite stable tumors (32%) overexpressed cyclin E. Lower molecular weight cyclin E proteins were present in 7 of 87 microsatellite stable carcinoma (8%), compared to 7 cases exhibiting lower molecular weight isoforms of 13 MSI carcinoma (54%). CONCLUSION: Increased cyclin E protein expression and the appearance of lower molecular weight cyclin E proteins were significantly associated with MSI in colorectal tumors. The data indicate that increased and/or aberrant expression of cyclin E protein might contribute to the mutator phenotype of colorectal cancer.     

胃癌证型与肿瘤增殖的关系

目的:探索胃癌中医证型与肿瘤增殖的关系方法:胃癌患者91例,术前按中医辨证分型标准归类成6型,术后标本用免疫组化Envision法检测胃癌组织Ki67与Cyclin E的蛋白表达,观察不同证型肿瘤增殖差异．结果:Ki67,Cyclin E阳性表达率分别为 98．90％(90／91),72．53％(66／91)．Cyclin E的表达与胃癌病理分型(P=0．0394)及远处转移(P =0．0096)存在相关性,女性患者有无远处转移与Cyclin E表达有统计学意义(P=0．0193),有远处转移的患者表达较高．Ki67与预后相关因素未见相关性．Ki67的表达与证型存在相关性 (P=0．0377),肝胃不和型与痰湿凝结型、气血双亏型Ki67表达存在差异,肝胃不和型高于痰湿凝结型(P<0．01)、气血双亏型(P<0．05), 胃热伤阴型与痰湿凝结型Ki67存在差异,胃热伤阴型高于痰湿凝结型(P<0．05);Cyclin E的表达各证型未见统计学差异(P<=0．1254)．结论:Cyclin E可作为判断胃癌预后的重要指标．胃癌不同证型存在部分增殖差异,Ki67与胃癌证型相关,Cyclin E与证型无关．     

Association of cyclin D1 G870A polymorphism with susceptibility to gastric cancers in Korean male patients

Cyclin D1 is a key cell cycle regulator that is upregulated in gastric cancer. The common G870A polymorphism of cyclin D1 which can influence cancer susceptibility and disease outcome has been the most frequently investigated. The specific aim of this study is to investigate whether the G870A polymorphism of cyclin D1 was associated with individual susceptibility to gastric cancer in Korea. The frequency of the polymorphism was examined in 253 gastric cancer patients and 442 healthy controls. Polymorphism analysis was performed by amplifying exon 4 of cyclin D1 and sequencing the products. The frequencies of genotypes: G/G, G/A and A/A were 28.1% (71/253), 49.4% (125/253) and 22.5% (57/253), respectively, in gastric cancer cases, and 23.1%, 51.1% and 25.8%, respectively, in healthy controls. Statistically, the polymorphism was not associated with increased risk of gastric cancer. When stratified by histological subtype of gastric cancer, the risk was also not statistically significant. However, the male gastric cancer patients showed a significantly higher proportion of the homozygous G/G genotype and the G allele (Chi-Square test, P = 0.0242 & P = 0.0307) compared to males in the control group. Thus, our findings suggested that the G870A polymorphism of cyclin D1 was not associated with an increased risk for gastric cancer in this population, however, it may contribute to susceptibility to gastric cancer in men.     

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.