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1.
S100A4蛋白表达与胃癌侵袭转移关系的研究   总被引:4,自引:2,他引:2  
目的:探讨S100A4蛋白产与胃癌侵袭转移的关系。方法:应用免疫组织化学方法检测62例胃癌患者的胃癌组织和38例癌旁正常粘膜、23例淋巴结转移癌及胃癌纱MKN45、BGC823中S100A4蛋白表达,Boyden小室法检测胃癌细胞侵袭能力。结果:胃癌组织S100A4表达阳性率(70.59%)显著高于癌旁正常粘膜(15.79%)(P〈0.01)。在弥温生长、低分化及未分化型、浸透浆膜、淋巴结转移阳性  相似文献   

2.
目的:从胃癌形态学方面,探讨辽宁省庄河地区胃癌高发区胃癌病理形态学特征及其年代变化趋势,探讨这种变化与胃癌发病影响因素之间的关系,为胃癌防治提供线索和依据。方法:选取1992-2005年在辽宁庄河市中心医院接受手术切除的胃癌标本共计1003例。标本均经4%甲醛固定,病理常规系统检查。结果:1003例胃癌患者平均发病年龄58.9岁(17~84岁);不同年代胃癌高发年龄均为60~69岁,其次为50~59岁,男性胃癌患者明显多于女性患者(P〈0.001),男女患者之比为3.0:1。1003例胃癌患者中,共检出早期胃癌159例(15.9%),年均构成比为15.3%,中期胃癌195例(19.4%),晚期胃癌649例(64.7%)。各年间早期胃癌大体分型以Ⅲ型为主;进展期胃癌以BorrmannⅢ型为主。在淋巴结转移方面,早期胃癌各年间无淋巴结转移者多于有淋巴结转移者;进展期胃癌各年间有淋巴结转移者多于无淋巴结转移者。在组织学分型方面,乳头状管状腺癌、中分化管状腺癌、低分化管状腺癌和印戎细胞癌呈逐年下降趋势;黏液腺癌、未分化癌呈逐年升高趋势;若以Lauren分类为标准,在各年代间均以弥漫型胃癌占优势,并呈逐年上升趋势,肠型胃癌呈下降趋势,二者比值呈下降趋势。结论:随着年代的变迁,庄河地区胃癌临床流行病学特征有明显变化。  相似文献   

3.
p53,ras,nm23在原发性胃癌中的联合表达研究   总被引:4,自引:1,他引:4  
应用免疫组化ABC法,检测78例原发性胃癌组织P53、p21(ras基因表达产物)和nm23基因蛋白的表达,探讨其与肿瘤发展、分化程度、淋巴结转移等胄癌生物学行为的关系。结果p53在中晚期胄癌(57%)、低分化胃癌(76%)、伴淋巴结转移胃癌(62%)中的表达明显高于其在早期(1%)、高分化(4%)反不伴淋巴结转移胄癌(20%)中的表达率(P<0.05);p21蛋白表达与胃癌分期和有无淋巴结转移的关系也显示了类似趋势,但其与分化程度的关系无统计学意义;nm23表达主要与癌细胞侵袭程度和淋巴结转移呈负相关(P<0.05),不同分化程度胄癌中的表达无显著差异。结果表明:胃癌的发生、发展可能与多基因异常有关,p53、p21高表达与nm23低表达在癌细胞增殖及肿瘤浸润中起重要作用,胃癌淋巴结转移是一个多基因作用且较为复杂的过程。  相似文献   

4.
目的 探讨基质金属蛋白酶MMP-2、MMP-9、MMP-3在胃癌中的表达及其与侵袭、转移和生存期的关系。方法 应用免疫组织化学SP法检测105例胃癌组织及60例相应癌转移淋巴结中MMP-2、MMP-9、MMP-3的表达情况。结果 MMP-2、MMP-9、MMP-3在淋巴结转移灶的阳性表达率(分别为90.0%、88.3%、85.0%)显著高于胃癌组织中的阳性表达率(分别为72.4%、74.3%、71.4%)。三者表达强度与胃癌细胞分化程度无明显相关(P〉0.05),而与胃癌的病期、浸润深度、淋巴结转移和远处转移密切相关(P〈0.05)。MMP-9阳性表达者的5年生存率(22.7%)较阴性表达者(31.4%)低(P〈0.05)。结论 MMP-2、MMP-9、MMP-3表达与胃癌的浸润和淋巴结转移密切相关,MMP-9可作为患者预后有用的指标。  相似文献   

5.
残胃癌43例临床病理分析   总被引:4,自引:0,他引:4  
目的:探讨残胃癌的临床及病理特点,方法:对43例残胃癌临床病理资料进行回顾性分析。结果:43例残胃癌患者临床症状以腹痛,腹胀,黑便,吞咽困难为主要表现;首次手术方式:胃切除比Ⅱ式吻合32例(74.4%),胃切除毕I式吻合11例(25.6%),距首次手术发生残胃癌时间为5-25年,平均12年,发生部;钱胃吻合口25例(58.1%),残胃贲门15例(34.9%,其中3例同时侵犯食管下段),残胃小弯侧癌3例,组织学类型,高分化腺癌6例(13.9%),中分化腺癌6例(13.9%),低分化腺癌21例(48.8%),未分化癌6例(13.9%),黏液腺癌4例(9.3%),25例出现邻近脏器,组织(肝,胰,脾,肠系膜,网膜)转移(58.1%),无转移者18例(41.9%),其中5例癌组织局限在黏膜层及黏膜下层,结论:残胃癌多发生于胃切除毕II式吻合术后,胃大部切除术后定期随访,必要时做胃镜检查及病理活检可早期发现残胃癌,有效的治疗能延长残胃癌患者的生存期。  相似文献   

6.
胃癌组织中maspin基因和HGF及E-cadherin的表达及相关性研究   总被引:1,自引:0,他引:1  
目的:研究胃癌组织中maspin基因、HGF和E-cadherin的表达及相关关系。方法:应用免疫组化ABC法检测137例胃癌、66例不典型增生及54例正常胃黏膜组织中maspin基因、HGF和E-cadherin的表达。结果:在正常胃黏膜、不典型增生和胃癌组织中maspin基因表达分别为72.2%(39/54)、63.6%(42/66)和40,9%(56/137),差异有统计学意义,P〈0.05;HGF表达分别是22.2%(12/54)、40.9%(27/66)和67、9%(93/137),差异有统计学意义,P〈0.05;E-cadherin表达分别是88.9%(48/54)、77.3%(51/66)和52.5%(72/137),差异有统计学意义,P〈0.05。maspin基因的表达与淋巴结转移、浸润深度及分化程度有关,与肿瘤大小、病理分型及TNM分期无关。HGF的表达与TNM分期、淋巴结转移相关,与病理分型、肿瘤大小、分化程度和浸润深度无关。E-cadherin表达与浸润深度、分化程度、淋巴结转移和TNM分期相关,与病理分型、肿瘤大小无关。Maspin基因表达与HGF呈负相关,r=-0.350,P〈0.01;与E-cadherin呈正相关,r=0.433,P〈0.01。结论:maspin基因在胃癌组织中表达下调可能导致细胞黏附减少及细胞的运动能力增加引起胃癌的发生发展和侵袭转移。  相似文献   

7.
胃癌侵袭和转移分子机制研究进展   总被引:2,自引:0,他引:2  
胃癌是我国常见的恶性肿瘤之一 ,占消化道恶性肿瘤第一位 ,癌细胞侵袭和转移是影响其疗效的主要原因。胃癌侵袭和转移的过程非常复杂 ,从分子水平可将其归纳为:粘附分子介导癌细胞与正常细胞、细胞外基质(ECM)进行粘附 ;癌细胞释放多种蛋白水解酶降解所粘附的组织 ;水解酶使胃癌细胞粘附部位形成空隙 ,从而使胃癌细胞向纵深方向或远处运动 ;着床的癌细胞在多种促血管生成因子的作用下形成新生血管 ;癌细胞通过自身机制逃避宿主免疫监视系统的杀伤作用得以生存增殖。明确胃癌侵袭和转移具体的分子机制 ,采取有效的阻断转移 ,对估计预后…  相似文献   

8.
目的:研究Snail蛋白在胃癌中的表达与胃癌浸润转移的关系。方法:应用免疫组织化学sP法,检测Snail蛋白在87例胃癌和24例正常胃粘膜组织中的表达及其在细胞中的定位。结果:Snail蛋白高度表达于胃癌组织的细胞核、细胞质,正常胃粘膜组织中表达较少甚至不表达,阳性率分别为89.6%和29.1%,两者有统计学意义(P〈0.05)。Snail的表达与胃癌的组织学分化、浸润深度和淋巴结转移有关(P〈0.05)。结论:胃癌的侵袭转移与Snail蛋白的表达有关,Snail蛋白有可能成为胃癌侵袭转移的生物学标志。  相似文献   

9.
目的:检测血管内皮生长因子-C(vascular endothelial growth factor-C,VEGF-C)在胃癌组织中的表达及其与肿瘤淋巴结转移的关系。方法:采用免疫组织化ABC法检测52例胃癌组织中VEGF-C的表达及定位。结果:52例中29例VEGF-C染色阳性,阳性率55.8%,阳性物质主要位于细胞质内,VEGFC在有淋巴结转移的胃癌组织中表达(63.4%)明显高于无淋巴结转移组(27.3%),X^2=4.59,P〈0.05;低分化胃癌中的表达(72.4%)明显高于高、中分化胃癌(37.8%),X^2=7.44,P〈0.01。结论:VEGF-C的表达与胃癌肿瘤细胞的淋巴结转移密切相关。  相似文献   

10.
目的:研究β-catenin基因表达与胃癌侵袭转移的关系。方法:采用免疫组化S-PF检测65例胃癌组织中β-catenin基因表达。结果:胃癌中β-catenin异常表达率为56.95,弥漫型(76.3%)显著高于肠型胃癌(27.3%),P<0.01),与淋巴结转移密切相关(P<0.01),与肿瘤浸润深度无关(P>0.05)。结论β-catenin基因异常表达是胃癌发生侵袭转移的分子机制之一,也是判断胃癌侵袭转移的良好指标。  相似文献   

11.
乙酰肝素酶mRNA表达和血管生成与胃癌发展的关系   总被引:8,自引:1,他引:7  
目的 探讨乙酰肝素酶mRNA表达状况和血管生成与胃癌发展的关系。方法 应用原位杂交技术 ,检测 5 2例胃癌组织中乙酰肝素酶mRNA的表达情况 ,并用免疫组化法对全部标本用CD34抗体进行肿瘤血管内皮染色 ,计数肿瘤微血管密度 (MVD) ,分析乙酰肝素酶mRNA与MVD及其与胃癌组织分化程度、浸润深度、淋巴结转移和器官转移的关系。结果 胃癌组织乙酰肝素酶mRNA阳性表达 2 5例 (4 8.1% ) ,MVD平均值为 73.2± 2 2 .8;阴性表达 2 7例 (5 1.9% ) ,MVD平均值为 4 4 .8±11.9,两者之间差异有显著性 (P <0 .0 0 1)。乙酰肝素酶mRNA表达和MVD与胃癌组织浸润深度、淋巴结转移有关 (P <0 .0 0 5 )。结论 乙酰肝素酶与胃癌的血管生成密切相关 ,对胃癌的生长和浸润转移有促进作用 ,乙酰肝素酶可作为反映胃癌生物学行为的客观指标。  相似文献   

12.
Objective: To study the expression of CD44s mRNA in the occurrence, development and invasion of gastric carcinoma (GC). Methods: The expressions of CD44s mRNA in 66 cases of GC, 25 cases of superficial gastritis and 25 cases of atypical hyperplasia were examined by in situ hybridization (ISH). Results: There was no expression of CD44s mRNA in the group of superficial gastritis; the positive rate was 20%(5/25) in the group of atypical hyperplasia and 62.12%(41/66) in the group of gastric carcinoma. The positive rate in poor differentiation group was significantly higher than that in well differentiation group (P〈0.05), and the positive rate of lymph node metastasis group was significantly higher than that in negative lymph node metastasis group(P〈0.05). Conclusion: The expression of CD44s mRNA was related to cell differentiation degree and lymph node metastasis, the activation of CD44s gene was related to strong invasion of cancer cells and poor prognosis.  相似文献   

13.
目的:探讨长链非编码RNA(long non-coding RNA,lncRNA)-uc003uxs在缺氧诱导胃癌侵袭和转移中的作用。方法:三个胃癌细胞系SGC7901、MKN45、MKN28分别经常氧和缺氧孵育 24 h ,提取3例配对的胃癌细胞总RNA,利用高通量lncRNA芯片比较它们之间的表达谱差异,初步筛选与缺氧诱导胃癌侵袭转移相关的关键分子。RT-PCR法检测 lncRNA-uc003uxs在缺氧诱导的胃癌细胞(相对于常氧诱导的胃癌细胞)以及20对胃癌组织(相对于癌旁组织)中的表达水平。通过慢病毒转染,稳定下调SGC7901和MKN28细胞中lncRNA-uc003uxs的表达。通过Transwell迁移和侵袭实验以及裸鼠尾静脉注射内脏转移实验检测lncRNA-uc003uxs下调后对胃癌细胞侵袭和转移能力的影响。结果:高通量芯片分析结果显示:与常氧诱导的胃癌细胞相比,缺氧诱导的胃癌细胞 SGC7901、MKN45和MKN28中有84个共同上调的lncRNA分子以及70个共同下调的lncRNA分子,而多重筛选策略则提示:lncRNA-uc003uxs可能是缺氧诱导胃癌侵袭转移的关键lncRNA分子之一。RT-PCR结果表明:lncRNA-uc003uxs在缺氧诱导的胃癌细胞SGC7901、MKN45和MKN28中显著上调,其在胃癌组织中的表达水平也显著高于癌旁组织。Transwell实验结果显示:缺氧能够显著增加SGC7901和MKN28细胞的迁移和侵袭能力,而下调lncRNA-uc003uxs的表达后,两种细胞的迁移和侵袭能力明显下降。此外,裸鼠尾静脉内脏转移实验也证实lncRNA-uc003uxs的下调抑制了胃癌细胞SGC7901的体内肝肺转移能力。结论:利用高通量芯片筛选,在胃癌细胞中发现了一系列缺氧相关的lncRNA分子。临床标本分析及功能缺失试验证实:lncRNA-uc003uxs是一个缺氧诱导胃癌侵袭转移的关键lncRNA分子。  相似文献   

14.
 应用免疫组化方法检测29例胃癌患者原发灶、淋巴结转移灶及邻近正常胃粘膜等不同组织的α4、β1、β4亚单位整合素表达状况。结果发现原发灶和淋巴结转移灶中α4、β1、β4三亚单位整合素的分布极性发生明显改变,且其原发灶组和/或淋巴结组的表达程度分别明显强于邻近正常胃粘膜组;在原发灶组中,三亚单位尤其是α4、β4的表达强度与胃癌生长方式、分化程度、浸润深度、淋巴结、肝胆转移状况、Borrmann分型等临床病理因素密切相关。结果提示原发灶和淋巴结转移灶中胃癌细胞表面α4、β1、β4三亚单位整合素的极性分布明显紊乱,它们表达的增强或减强可能在胃癌浸润、转移过程中发挥着非常重要的作用。  相似文献   

15.
生长抑素的表达与胃癌生物学行为相关性研究   总被引:5,自引:0,他引:5  
目的 :研究胃癌组织中生长抑素 (somatostatin ,SS)表达及其与胃癌生物学行为的关系。方法 :用免疫组化即用型SP法和核仁组织区嗜银染色法测定 5 7例胃癌及癌旁组织生长抑素的表达及细胞增殖活性。结果 :胃癌组织SS的阳性表达率为 36 8% ,癌旁为 77 2 % (P <0 0 1) ;胃窦癌SS阳性表达率为 5 0 % ,贲门癌为 19 0 % (P <0 0 1) ;分化程度好的胃癌SS阳性表达率为 5 2 2 % ,而分化程度差的胃癌为 2 6 5 % (P <0 0 1) ,即各组均有明显差异。随着各组SS表达水平的降低 ,AgNOR计数颗粒相应升高。结论 :胃癌组织中生长抑素表达与胃癌分化类型、生长部位、细胞的增殖活性有关系 ,生长抑素可能参与了胃癌细胞的增殖、分化过程  相似文献   

16.
The purpose of this study is to clarify the correlation between cell differentiation and tumor development, including tumor aggressiveness and biological behavior. Eighty-three cases of advanced colorectal adenocarcinoma were randomly selected. Using immunohistochemical staining with antibodies to CD10, MUC2 and human gastric mucin (HGM), the colorectal adenocarcinomas could be classified into five types (18 small intestinal, 27 large intestinal, 2 gastric, 9 mixed and 27 unclassified). Each type had characteristic features. The small-intestinal type showed a relatively lower incidence of lymphatic permeation and higher venous invasion. The large-intestinal type showed a low incidence of venous invasion and lymph node metastasis. The mixed type revealed female and right-side-dominant distribution, large tumor size, high incidence of mucinous carcinoma, and low incidence of venous invasion. Gastric type was seen in only two cases (2%), which exhibited high histologic grade, lymphatic permeation and lymph node metastasis with no venous invasion. Such phenotypic classifications are considered to be useful not only for evaluation of the biological behavior of the carcinoma, but also for analysis of tumorigenesis.  相似文献   

17.
The purpose of this study is to clarify the correlation between cell differentiation and tumor development, including tumor aggressiveness and biological behavior. Eighty-three cases of advanced colorectal adenocarcinoma were randomly selected. Using immunohistochemical staining with antibodies to CD10, MUC2 and human gastric mucin (HGM), the colorectal adenocarcinomas could be classified into five types (18 small intestinal, 27 large intestinal, 2 gastric, 9 mixed and 27 unclassified). Each type had characteristic features. The small-intestinal type showed a relatively lower incidence of lymphatic permeation and higher venous invasion. The large-intestinal type showed a low incidence of venous invasion and lymph node metastasis. The mixed type revealed female and right-side-dominant distribution, large tumor size, high incidence of mucinous carcinoma, and low incidence of venous invasion. Gastric type was seen in only two cases (2%), which exhibited high histologic grade, lymphatic permeation and lymph node metastasis with no venous invasion. Such phenotypic classifications are considered to be useful not only for evaluation of the biological behavior of the carcinoma, but also for analysis of tumorigenesis.  相似文献   

18.
Perturbation in E-cadherin expression leads to loss of cellular adhesion with possible consequence of cellular transformation and tumor progression. The aims of this study were to determine E-cadherin expression in each subtype of gastric cancer classified by different classification systems, and to investigate the role of E-cadherin in cell differentiation, cancer invasion and metastasis. Expression of E-cadherin was analyzed in 84 patients with gastric adenocarcinoma by immunohistochemistry and correlated with clinicopahotlogical parameters. Our results showed loss of E-cadherin expression in 0% (0/3), 20.0% (9/45), 48% (15/31), 100% (3/3) and 100% (2/2) of papillary, tubular, poorly differentiated, signet-ring cell, and mucinous adenocarcinoma by Japanese histological classification. The reduction of E-cadherin expression was inversely correlated with the grade of differentiation. According to the histological classification of Lauren and Ming, the frequency of lost E-cadherin expression was higher in diffuse type (65%) and infiltrative type (64%) gastric cancer than in intestinal type (20%, P<0.001) and expanding type cancer (22%, P<0.001), respectively. The loss of E-cadherin expression was significantly associated with tumor invasion (P<0.05). Furthermore, there was a borderline association between the loss of E-cadherin expression and poor survival (P=0.109). These data demonstrated a striking correlation between E-cadherin expression and the differentiation of gastric carcinoma. The loss of E-cadherin expression may contribute to gastric cancer invasion to adjacent organs.  相似文献   

19.
目的探讨基质金属蛋白酶.7(MMP.7)、E-钙黏附素(E—CD)在胃癌组织中的表达及其与胃癌侵袭、转移的相关性。方法采用原位杂交法,检测78例胃癌组织中MMP-7mRNA和E—CDmRNA的表达,观察二者与浸润深度和淋巴结转移之间的关系。结果胃癌组织中MMP-7mRNA和E-CDmRNA的阳性表达与浸润深度和淋巴结转移有关。MMP-7mRNA阳性表达的胃癌组织中E—CDmRNA的阳性表达率[9.09%(6/66)[低于MMP-7mRNA阴性表达的胃癌组织中E—CDmRNA的阳性表达率[66.70%(8/12)1,二者呈负相关(r=-0.269,P〈0.05)。结论MMP-7mRNA和E—CDmRNA的表达与胃癌的浸润、转移密切相关,且二者的表达呈负相关。检测MMP-7mRNA和E—CDmRNA在胃癌患者胃镜活检组织中的表达有助于预后判断。  相似文献   

20.
Background: The mucin components of the gastric gel layer function as a protective and lubricatingfactor against luminal acid and proteolytic enzymes. Alteration of mucin expression in gastric preneoplasticand neoplastic lesions has suggested potential roles in neoplastic processes. This study aimed to assess theclinicopathological and prognostic significance of MUC-2, MUC-4 and MUC-5AC in Japanese gastric cancer.Methods: Expression of MUC-2, -4 and -5AC was evaluated on tissue microarrays of gastric carcinomas andadjacent non-cancerous mucosa specimens by immunohistochemistry and compared with clinicopathologicalparameters and survival time of the patients. Results: The three mucins were found to be expressed to a lesserextent in gastric carcinomas in comparison with non-cancerous mucosa (p<0.05). MUC-2 expression wasnegatively correlated with tumor size, depth of invasion, and TNM staging of gastric cancer (p<0.05), while thatof MUC-5AC was negatively associated with the depth of invasion, venous invasion, lymph node metastasis andTNM staging (p<0.05), but positively with MUC-4 and MUC-2 expression (p<0.05). There was higher MUC-2expression in intestinal- than diffuse-type carcinomas (p<0.05). Kaplan-Meier analysis indicated no relationshipbetween expression of the three mucins and the cumulative survival rate of patients, even stratified according tothe depth of invasion (p>0.05). Conclusion: Down-regulated expression of MUC-2, -4 and -5AC may be involvedin pathogenesis, invasion, metastasis or differentiation of gastric carcinoma. Their altered expression mighttherefore be employed as an indicator of pathobiological behavior.  相似文献   

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