三叶因子1与胃癌发生发展过程中血管生成的关系

目的:观察三叶因子1(TFF1)和血管内皮生长因子(VEGF)在正常胃黏膜组织、癌旁组织和胃癌组织中的表达,并探讨TFF1与胃癌发生发展过程中血管生成的关系.方法:采用SP免疫组化方法检测142例正常组织、66例癌旁组织和66例胃癌组织中TFF1和VEGF的表达,以CD34标记血管内皮,测定MVD.结果:TFF1表达在正常胃黏膜组织→癌旁组织→胃癌组织中呈逐渐减弱趋势(209.40±16.00,199.12±16.68,189.17±16.20),差异具有显著性(P<0.01),而VEGF的表达和MVD呈逐渐上升趋势(69.7%,40.9%,35.7%;38.90±6.74,28.68±5.08.25.13±4.46).MVD值与TFF1灰度值呈正相关(r=0.811,P<0.01),即MVD值与TFF1的表达呈负相关.结论:TFF1作为一种胃癌特异性抑制因子,在胃癌发生发展过程中并未促进新生血管的生成.     

pS2/TFF1蛋白在胃癌及其癌前病变组织中表达的研究

背景:pS2/TFF1蛋白属于三叶因子家族,是一类具有胃肠道黏膜保护和修复作用的生长因子类小分子多肽物质,研究pS2/TFF1蛋白可能为胃癌的防治开辟新的思路。目的:观察pS2/TFF1蛋白在胃癌及其癌前病变组织中的表达,探讨其与胃癌发生的关系。方法:采用免疫组化法检测30例慢性非萎缩性胃炎、35例慢性萎缩性胃炎、50例慢性萎缩性胃炎伴肠化生、37例异型增生、46例胃癌和30名健康志愿者胃黏膜组织中pS2/TFF1蛋白的表达。结果:正常胃黏膜组织-慢性非萎缩性胃炎-慢性萎缩性胃炎-慢性萎缩性胃炎伴肠化生-异型增生-胃癌组织中,pS2/TFF1蛋白阳性表达呈逐渐下降的趋势(分别为100%、93.3%、82.9%、78.0%、62.2%、56.5%),差异有统计学意义(P0.05)。与正常对照组、慢性非萎缩性胃炎组和慢性萎缩性胃炎组相比,慢性萎缩性胃炎伴肠化生组、异型增生组和胃癌组pS2/TFF1蛋白阳性表达均显著降低(P0.05),而后三组之间的差异无统计学意义(P0.05)。结论:pS2/TFF1蛋白表达降低是胃癌发生过程中的早期事件,有望成为诊断胃癌的标记物。     

缺氧诱导胃癌细胞SGC-7901中三叶因子3与血管内皮生长因子相互关系研究

目的 探讨在缺氧条件下胃癌细胞SGC-7901中三叶因子3(TFF3)与血管内皮生长因子(VEGF)及缺氧诱导因子(HIF-1α)的相互关系,了解TFF3在胃癌发生发展过程中的作用机制.方法 使用氯化钴( CoCl2)构建胃癌细胞株SGC-7901的缺氧模型.运用携带靶向干扰人类TFF3的pU6 siTFF3和pU6-mock分别转染胃癌细胞株SGC-7901.以嘌呤霉素为筛选药物,建立稳定特异性抑制TFF3的胃癌细胞株.在缺氧环境和常氧环境下培养胃癌细胞株SGC-7901和靶向干扰TFF3后的胃癌细胞株SGC-7901,运用定量PCR、ELISA和Western印迹分析等方法分别测定其TFF3、HIF-1α和VEGF的蛋白和mRNA表达情况.运用免疫荧光法观察在缺氧环境和常氧环境下胃癌细胞株SGC-7901中TFF3、HIF-1α的分布及表达量.结果 CoCl2缺氧处理能诱导胃癌细胞株SGC-7901中H1F-1α、TFF3和VEGF mRNA表达量上升(分别为33.4±1 8、14.8±1.1和15.1±1.2).稳定干扰TFF3的SGC-7901细胞在缺氧诱导下能下调VEGF和HIF-1蛋白的表达.结论 TFF3介导调节了缺氧条件下VEGF和HIF-1的表达,TFF3有可能是潜在的抗血管生成胃癌治疗靶点.     

TFF2、CLDN18、MUC5AC蛋白在胃黏膜病变过程中的表达变化及其临床意义

背景:胃癌是我国发病率和死亡率最高的恶性肿瘤之一,胃黏膜病变过程中早期分子标记是近年胃癌研究的重点。目的:探讨三叶因子2(TFF2)、闭合蛋白18(CLDN18)和黏蛋白5AC(MUC5AC)在不同胃黏膜病变中的表达情况及其临床意义。方法:选取2008年12月-2009年5月内蒙古自治区人民医院的胃镜活检和手术标本71例,其中正常胃黏膜组织20例,肠化生组织20例,异型增生组织11例,胃癌组织20例,采用免疫组化SP法检测TFF2、CLDN18和MUC5AC蛋白表达情况。结果:正常胃黏膜组织中TFF2、CLDN18和MUC5AC蛋白均为阳性表达,表达率为100%,而肠化生、异型增生以及胃癌组织中,三种蛋白阳性表达率依次逐渐下降,组间差异有统计学意义(P0.01)。结论:TFF2、CLDN18和MUC5AC蛋白表达水平与胃黏膜组织恶性程度密切相关,是潜在的预测胃癌发生、发展和预后的重要生物学标记。     

三叶因子Ⅰ和Ⅱ在胃癌和癌前状态中的表达

目的　探讨三叶因子Ⅰ (trefoilfactor1,TFF1)和Ⅱ (TFF2 )与癌前状态及胃癌发生及发展的关系。方法　对 14 0例经病理证实的不同胃黏膜病变 ,采用免疫组化方法进行TFF1、TFF2蛋白的定位和半定量检测。结果　在慢性浅表性胃炎、胃溃疡、慢性萎缩性胃炎和胃癌 4种病变中 ,TFF1表达呈逐渐减弱趋势 (P <0 0 5)。TFF2在上述 4种病变中的表达差异亦有显著性 (P <0 0 5) ,其中在胃溃疡、慢性萎缩性胃炎和胃癌组织中 ,TFF2表达逐渐降低 (P <0 0 5)。结论　TFF1和TFF2蛋白在癌前状态和胃癌的表达降低 ,TFF1和TFF2的作用机制以及临床应用前景有待于进一步研究     

血清三叶因子3在胃癌中表达的临床研究

背景:在中国恶性肿瘤发病率和死亡率排序中,胃癌分居第二和第三位。探索方法简便、敏感性高的非侵入性指标以筛选出胃癌高危人群接受胃镜检查是胃癌普查的有效途径。目的:探讨三叶因子3(TFF3)作为胃癌筛查血清生物学标记物的临床价值。方法:收集宁波市医疗中心李惠利医院2013年7月—2014年1月49例胃癌患者和29名健康体检者的血清标本,采用ELISA法检测血清TFFs浓度,以ROC曲线及其曲线下面积(AUC)分析血清TFF1、TFF2、TFF3对胃癌的诊断性能,并进一步分析三者与胃癌临床病理特征的关系。结果:胃癌组TFF3血清浓度显著高于健康对照组[(43.57±19.49)ng/mL对(29.97±14.20)ng/mL,P0.01],两组间TFF1、TFF2血清浓度差异无统计学意义(P0.05)。血清TFF1、TFF2、TFF3诊断胃癌的AUC分别为0.56、0.56和0.83,TFF3诊断性能最高;以33.0 ng/mL为TFF3 cut off值,相应敏感性和特异性分别为63.3%和82.8%,预测胃癌风险的OR值为8.27。TFF3血清浓度与胃癌TNM分期、分化程度和淋巴结转移显著相关(P0.05)。结论:血清TFF3是一个有应用前景的非侵入性胃癌筛查生物学标记物。     

TFF3和CD147在不同胃黏膜病变中的表达及其与血管生成的关系

目的:探讨三叶因子3(trefoil factor 3.TFF3)和CD147在不同胃黏膜病变中的表达与间质微血管(microvessel density,MVD)值的关系.方法:利用组织芯片技术制作302例的组织芯片,同时采用S-P免疫组化方法检测TFF3、CD147和CD34表达.结果:萎缩性胃炎、不典型增生和胃癌各组TFF3表达均高于浅表性胃炎和正常组(48.3%,51.9%,41.7% VS 13.3%;48.3%,51.9%,41.7%VS 3.6%,均P＜0.01);胃癌CDl47表达和MVD高于正常胃黏膜、浅表性胃炎、萎缩性胃炎和不典型增生(78.9% VS 14.3%,43.3%,51.2%,59.3%;31.86±9.92 VS 26.10±6.82,24.74±5.49,20.77±6.87,14.95±6.28,均P＜0.05),浅表性胃炎CD147表达和MVD与正常胃黏膜之间差异显著(43.3% VS 14.3%;20.77±6.87VS 14.95±6.28,均P＜0.05).TFF3、CD147表达和MVD与胃癌淋巴结转移和TNM分期有关(P＜0.05),TFF3表达与胃癌组织学类型有关(P＜0.05),CD147表达与胃癌分化程度和胃癌浸润深度有关(P＜0.01),MVD与胃癌浸润深度有关(P＜0.05).TFF3、CD147阳性表达的MVD高于阴性的(35.47±9.41 VS 29.27±9.50;33.33±9.62 VS 26.40±9.17,P＜0.01).TFF3和CD147表达与MVD呈显著正相关(r=0.323,r=0.279).TFF3( )/CD147( )者在深度浸润(T3-4)、临床分期TNMⅢ-Ⅳ、淋巴结转移的比率和MVD最高,且明显高于TFF3(-)/CD147(-)者(P＜0.05).结论:TFF3、CD147和CD34在胃黏膜癌变和癌变后的恶性演进过程中起重要作用,可作为胃癌的早期诊断和预测胃癌发生转移的重要指标.     

胃癌组织中MK、VEGF表达的意义

目的:研究中期因子(midkine,MK)和血管内皮生长因子(VEGF)在胃癌组织中的表达情况,并探讨其临床意义.方法:采用免疫组织化学方法检测64例胃癌组织、20例癌旁正常组织中MK、VEGF和CD34蛋白表达情况.结果:胃癌组织中MK、VEGF的阳性表达率分别为76.6%和79.7%,显著高于癌旁正常组织(0,15.0%)(P<0.05).MK、VEGF的表达水平与胃癌的浸润深度(χ2=7.111,P=0.008;χ2=7.590,P=0.006)、淋巴结转移(χ2=4.814,P=0.028;χ2=6.207,P=0.013)、临床分期(χ2=13.971,P=0.001;χ2=18.554,P=0.000).MK表达阳性的胃癌组织MVD显著高于MK表达阴性的胃癌组织(31.745±8.592vs24.680±8.938,P<0.01),而且MK、VEGF表达在胃癌中也存在一定相关性(χ2=4.447,P<0.05).结论:MK、VEGF在胃癌的生长、侵袭与转移中起重要作用,他们之间存在相互诱导或是协同效应,其共同表达可作为判断胃癌预后的指标.     

胃癌组织环氧合酶-2表达与血管内皮生长因子的关系

目的 观察胃癌环氧合酶-2和血管内皮生长因子的表达及相互关系。方法 应用免疫组化法检测胃癌组织COX-2和VEGF的表达状况。结果 32例胃癌中发现COX-2表达阳性22例(68.7％),其中伴淋巴结转移者COX-2表达阳性率80.9％(17/21),高于不伴淋巴结转移者的45.4％(5/11)(P<0.05)。而不同胃癌分期与组织类型之间COX-2表达无显著性差异(P>0.05)。32例胃癌中VEGF表达阳性20例(62.5％),其中COX-2阳性胃癌VEGF表达阳性率77.3％(17/22),而COX-2阴性胃癌VEGF阳性率30％(3/10),两组比较具有显著性差异(P<0.05)。结论 胃癌组织存在COX-2过度表达,且与VEGF表达相关。     

环氧合酶-2和血管内皮生长因子-C与胃癌淋巴管转移

目的　研究环氧合酶 2 (COX 2 )和血管内皮生长因子 (VEGF) C在胃癌组织中的表达及相关性 ,探讨二者在胃癌淋巴管生成和转移中的作用。方法　采用免疫组化方法和逆转录 PCR技术 ,分别检测了 6 4例胃癌石蜡组织中COX 2和VEGF C的表达及其中 2 2例胃癌新鲜组织中二者mRNA的表达。结果　 2 2例胃癌新鲜组织中COX 2和VEGF CmRNA表达阳性率分别为 82 %和73% ,其表达均高于相应的癌旁正常组织 (P <0 0 0 1) ,与 6 4例胃癌石蜡标本COX 2和VEGF C的表达结果较一致。且COX 2和VEGF C表达之间存在明显关联性 (P <0 0 5 )。二者在癌组织中的高表达与肿瘤浸润深度、淋巴结转移等密切相关 (P <0 0 5 )。结论　胃癌组织中有COX 2和VEGF C的高表达 ,而COX 2可能参与VEGF C淋巴管生成通路 ,它们的表达可能在胃癌淋巴管浸润和转移中发挥重要作用     

Relationship between trefoil factor 1 expression and gastric mucosa injuries and gastric cancer

AIM: To determine whether trefoil factor 1 (TFF1) is associated with mucosa healing and carcinoma suppression, we assess the expression of trefoil factor 1 in normal and pathologic gastric mucosa. METHODS: TFF1 in normal and pathologic gastric mucosa was assessed by immunohistochemical method, and the average positive A was estimated by Motic Images Advanced 3.0 software. RESULTS: Increased TFF1 was detected in gastritis, gastric ulcer and duodenal ulcer compared with normal mucosa. The same result could be seen in multiple and compound ulcer compared with simple ulcer. There was no significant difference between gastric ulcer and duodenal ulcer, gastritis and simple ulcer respectively. Increased TFF1 was detected in the peripheral mucosa of the gastric adenocarcinoma compared with normal mucosa. The expression of TFF1 in gastric adenocarcinoma was related to the differentiation of adenocarcinoma. The lower the differentiation of adenocarcinoma, the weaker the expression of TFF1. There was no TFF1 expressed in low-differentiated adenocarcinoma. The expression of TFF1 in middle and highly differentiated adenocarcinoma was a little lower than that in normal mucosa. But there was no significant difference. No TFF1 was assessed in esophageal squamous carcinoma and peripheral tissue. There was no significant difference between male and female. CONCLUSION: The expression of TFF1 was higher in gastritis and peptic ulcer than that in normal mucosa, and was also higher in multiple and compound ulcer than in simple ulcer. It seems that TFF1 plays a role in gastric mucosa protection and epithelial restitution. Increased expression of TFF1 in peripheral tissue suggests that TFF1 is associated with mechanism of carcinoma suppression and differentiation. Decreased expression of TFF1 in carcinoma and its relativity to the differentiation suggests that TFF1 is related to gland and cell destruction of carcinoma.     

Molecular forms of trefoil factor 1 in normal gastric mucosa and its expression in normal and abnormal gastric tissues

INTRODUCTION Trefoil factor 1 (TFF1) is a member of the trefoil factor family, which is a group of small molecule polypeptides mainly secreted by gastrointestinal mucous cells. TFF1 is mainly expressed in epithelial cytoplasm of the mucosa in gastric body…     

Relationship between trefoil factor 1 expression and gastric rnucosa injuries and gastric cancer

AIM: To determine whether trefoil factor 1 (TFF1) is associated with mucosa healing and carcinoma suppression, we assess the expression of trefoil factor 1 in normal and pathologic gastric mucosa.METHODS: TFF1 in normal and pathologic gastric mucosa was assessed by immunohistochemical method, and the average positive A was estimated by Motic Images Advanced 3.0 software.RESULTS: Increased TFF1 was detected in gastritis, gastric ulcer and duodenal ulcer compared with normal mucosa. The same result could be seen in multiple and compound ulcer compared with simple ulcer. There was no significant difference between gastric ulcer and duodenal ulcer, gastritis and simple ulcer respectively. Increased TFF1 was detected in the peripheral mucosa of the gastric adenocarcinoma compared with normalmucosa. The expression of TFF1 in gastric adenocarcinoma was related to the differentiation of adenocarcinoma. The lower the differentiation of adenocarcinoma, the weaker the expression of TFF1. There was no TFF1 expressed in low-differentiated adenocarcinoma. The expression of TFF1 in middle and highly differentiated adenocarcinoma was a little lower than that in normal mucosa. But there was no significant difference. No TFF1 was assessed in esophageal squamous carcinoma and peripheral tissue. There was no significant difference between male and female.CONCLUSION: The expression of TFF1 was higher in gastritis and peptic ulcer than that in normal mucosa, and was also higher in multiple and compound ulcer than in simple ulcer. It seems that TFF1 plays a role in gastric mucosa protection and epithelial restitution. Increased expression of TFF1 in peripheral tissue suggests that TFFLis associated with mechanism of carcinoma suppression and differentiation. Decreased expression of TFF1 in carcinoma and its relativity to the differentiation suggests that TFF1 is related to gland and cell destruction of carcinoma.     

TRAF4在胃癌组织中的表达及意义

目的:探讨肿瘤坏死因子受体相关因子4(TRAF4)在胃癌发生、发展中的作用.方法:应用组织芯片采用免疫组织化学法检测10例正常胃组织、45例胃癌及癌旁组织中TRAF4的表达,TUNEL法检测TRAF4阳性胃癌及正常胃组织中细胞凋亡.结果:TRAF4在正常胃组织中呈浆、核阳性表达.其浆阳性率在正常胃组织(80%)、不典型增生(93.3%)和胃癌(95.6%)中逐渐增高,但差异无统计学意义.而核阳性率在正常胃组织中高于胃癌(70.0%vs35.6%,P<0.05),在高分化胃癌中高于低分化胃癌(71.4%vs26.1%,P<0.05),在无淋巴转移胃癌中高于伴有淋巴转移(52.4%vs20.8%,P<0.05).TRAF4表达阳性正常胃组织细胞凋亡百分率高于胃癌组织(75vs37.2,P<0.05).结论:TRAF4在胃癌中具有较低核表达,且其核表达与胃癌分化程度呈正相关,与胃癌转移呈负相关,同时可能抑制胃癌凋亡.     

胃癌组织MMP-10和VEGF表达与血管生成的关系

目的:研究胃癌组织中基质金属蛋白酶- 10(MMP-10)、血管内皮生长因子(VEGF)和微血管密度(MVD)表达变化及其与肿瘤临床病理特征之间的关系.方法:以CD31作为MVD指标,应用免疫组化法检测60例胃癌组织和60例距病灶5 cm以上的正常组织中的MMP-10、VEGF和CD31的表达并对结果进行分析.结果:60例胃癌组织中的MMP-10、VEGF的表达阳性率分别为81.7%、76.7%,明显高于正常组织的表达阳性率11.7%、8.3%,两者差异有统计学意义(P<0.05).MMP-10、VEGF的表达与MVD、与肿瘤的分化程度、TNM分型、淋巴结的转移、浸润程度有关.结论:MMP-10、VEGF胃癌组织中高表达与胃癌侵袭转移、血管生成密切相关,可作为判断胃癌侵袭转移及预后的重要指标.     

三叶因子1表达与胃黏膜损伤及胃癌的关系

目的　测定三叶因子 1(TFF1)在正常及病理条件下胃黏膜中的表达情况 ,探讨TFF1在胃黏膜损伤修复及胃癌抑制中的作用及意义。方法　应用免疫组化方法测定正常及不同病理条件下胃黏膜中TFF1的表达情况 ,通过图像分析软件分析阳性信号平均吸光度值以了解其表达情况。结果　胃炎、胃溃疡及十二指肠球部溃疡患者TFF1表达明显高于正常胃黏膜 (0 .5 1± 0 .0 5 ,0 .5 1± 0 .0 6 ,0 .5 0± 0 .0 6比 0 .4 4± 0 .0 6 ;P值均 <0 .0 1)。胃腺癌患者癌旁组织表达 (0 .5 1± 0 .0 7)明显高于正常胃黏膜 ,而腺癌组织的表达强度则与癌组织的分化程度呈正比 ,分化程度愈低 ,表达愈弱 ,低分化腺癌无阳性表达 ,中、高分化腺癌表达 (0 .4 1± 0 .0 7)略低于正常黏膜 ,但差异无显著性 (P >0 .0 5 )。结论　TFF1表达随黏膜损伤程度的加重而表达增强 ,提示其在胃黏膜保护及促进上皮重建机制中具有一定的作用。TFF1在癌旁组织中表达增强提示其可能与肿瘤抑制及分化机制有关 ,而在癌组织中表达减弱可能与其分泌减少有关。     

胃癌组织中CTGF蛋白表达及其临床意义

目的探讨结缔组织生长因子（CTGF）蛋自在胃癌发生、发展中的作用。方法采用免疫组化法检测10份正常胃黏膜组织、50份胃癌组织及其癌旁组织中CTGF蛋白表达情况。结果胃癌组织中CTGF阳性表达高于癌旁组织及正常胃黏膜组织,P〈0．05;癌组织CTGF阳性表达率明显高于正常黏膜组织（P〈0．01）,CTGF的高表达与胃癌分化程度、淋巴结转移密切相关（P均〈0．05）;与肿瘤浸润的深度无明显关系。结论CTGF蛋白可作为胃癌前病变及胃癌早期诊断和预后判断的指标。     

Prognostic significance of expression of cyclooxygenase-2 and vascular endothelial growth factor in human gastric carcinoma

AIM: To investigate the role of cyclooxygenase-2(COX-2) and vascular endothelial growth factor (VEGF) in the development of gastric carcinoma and correlation between expression of COX-2 and VEGF and clinicopathologic features in tissues from patients with gastric carcinoma. METHODS: 281 patients with gastric carcinoma who underwent surgical resection between 1990 and 1999 at the First Affiliated Hospital, Anhui Medical University, PRC, were followed up. Expression of COX-2 and VEGF was investigated retrospectively in 232 gastric carcinoma tissues and 60 noncancerous specimens by using immunohistochemistry. RESULTS: The 5-year survival rates of early gastric carcinoma (EGC) and advanced gastric carcinoma (AGC) were 93.4 % and 59.0 %, respectively. Survival time was highly correlated with lymph node metastasis, vascular invasion, depth of invasion and treatment with chemotherapy. Compared with paired noncancerous tissues, expression of COX-2 and VEGF and microvessel density (MVD) value in carcinoma tissue were significantly higher. The MVD value was much higher in COX-2-positive group and VEGF-positive group than that in COX-2-negative group and VEGF-negative group. Expression of COX-2 and VEGF, as well as MVD value were highly correlated with lymph node metastasis and vascular invasion. The 5-year survival rate of patients with expression of COX-2 or VEGF was significantly lower than that of patients without COX-2 or VEGF expression. Multivariate analysis revealed that VEGF overexpression, lymph node metastasis, COX-2 overexpression, depth of invasion and vascular invasion were all independent prognostic factors of gastric carcinoma. CONCLUSION: Overexpression of COX-2 and VEGF in patients with gastric carcinoma can enhance the possibility of invasion and metastasis, implicating a poor prognosis. They may serve as the fairly good prognostic factors to indicate biologic behaviors of gastric carcinoma.