幽门螺杆菌相关性十二指肠球溃疡与胃癌中NF-κB、VEGF、Bcl-2、IL-1β的表达及意义

目的 探讨H.pylori相关性十二指肠溃疡与胃癌病例中NF-κB、Bcl-2、VEGF、IL-1β表达的差异及相互关系,进一步了解H.pylori致胃癌与十二指肠溃疡的发病机制.方法 选取胃镜检查的胃黏膜活检标本,十二指肠溃疡患者33例,胃癌患者63例,通过免疫组化SP法测定NF-κB、Bcl-2、VEGF、IL-1β在H.pylori感染与非感染的胃癌及十二指肠溃疡患者胃黏膜中的表达情况.结果 十二指肠溃疡组和胃癌组中,H.pylori感染者NF-κB、VEGF与IL-1β的表达水平高于H.pylori阴性者(P＜0.01或0.05),Bcl-2的表达无显著差异(P＞0.05);H.pylori感染病例中,NF-κB、Bcl-2、VEGF在胃癌组的表达水平高于十二指肠溃疡组(P＜0.01或0.05),IL-1β的表达无显著差异(P＞0.05);胃癌组与球溃疡组中,NF-κB的表达水平与VEGF均呈正相关(P＜0.05);胃癌组中,NF-κB和VEGF的表达水平与Bcl-2呈正相关(P＜0.05),与IL-1β表达水平无明显相关性(P＞0.05);球溃疡组中,NF-κB和VEGF的表达水平与IL-1β表达水平呈正相关(P＜0.05),与Bcl-2表达水平无明显相关性(P＞0.05).结论 幽门螺杆菌感染可上调宿主胃黏膜上皮NF-κB、VEGF及IL-1β的表达,三者表达水平具有协同性,其中NF-κB、VEGF表达的差异与十二指肠溃疡与胃癌两种不同的疾病转归相关.     

幽门螺杆菌相关性胃溃疡与胃癌中NF-κB、TFF3的表达及意义

目的探讨核转录因子-κB(NF-κB)和三叶因子3(TFF3)在胃溃疡和胃癌中表达的意义,以及与幽门螺杆菌(H.pylori)感染的关系。方法胃溃疡组(GU)60例,胃癌组(GC)70例,应用免疫组化方法测定TFF3和NF-κBp65的表达,同时检测H.pylori感染情况。结果 GC中NF-κBp65和TFF3表达水平均高于GU(P<0.01)。GC中NF-κBp65表达与TFF3表达呈显著正相关(r=0.350,P=0.003)。GU中H.pylori阳性病例中NF-κBp65、TFF3表达显著高于H.pylori阴性病例(P均<0.05)。H.pylori感染病例中,GC组的NF-κBp65、TFF3表达水平均比GU组高(P均<0.05);H.pylori阴性病例中,GC组的NF-κBp65、TFF3表达水平亦均比GU组高(P均<0.01)。结论 NF-κBp65和TFF3的高表达与胃癌的发生发展有着密切的关系,二者可能存在协同作用。H.pylori感染可以上调宿主胃黏膜NF-κBp65和TFF3的表达,表达的差异与胃溃疡和胃癌两种不同疾病转归相关。     

雷米普利对大鼠急性肺损伤时肺组织核因子-кВ表达的影响

目的：观察雷米普利时急性肺损伤(ALI)时肺组织核因子-κB(NF-κB)活性的影响。方法：SD大鼠随机分为正常对照组(NS组)、内毒素损伤组(LPS组)和雷米普利预防组(RAM组),用免疫组织化学法检测肺组织NF-κB的表达,并进行肺系数测定以及肺组织炎症细胞计数；光镜下观察大鼠肺组织的病理形态学变化。结果：LPS组肺组织NF-κB表达比NS组增强(P＜0．05),肺系数和炎症细胞数比NS组增加(P＜0．05),肺组织损伤改变严重；RAM组NF-κB表达比LPS组降低(P＜0．05),肺系数和炎症细胞数较LPS组减少(P＜0．05),肺组织损伤程度也减轻。结论：NF-κB活化在LPS诱导的AL1中起重要作用,雷米普利可降低NF-κB的活性,减轻LPS导致的ALI。     

早期胃癌患者H. pylori感染与活检组织PTEN、SOX2和NF-κB p65蛋白的关系

目的探讨早期胃癌患者幽门螺杆菌(H. pylori)感染与活检组织人第10号染色体缺失的磷酸酶及张力蛋白同源基因(PTEN)、性别决定相关基因簇2(SOX2)和核因子κB p65(NF-κB p65)蛋白表达的关系。方法选取2015年1月至2018年2月湖南省脑科医院收治的确诊为早期胃癌并接受手术的患者128例,其中H. pylori阴性者43例(阴性组),H. pylori阳性者85例(阳性组)。取存档的胃癌组织及癌旁组织石蜡标本,采用免疫组化法检测H. pylori阴性及阳性胃癌组织与癌旁组织中PTEN、SOX2和NF-κB p65蛋白的阳性表达情况,采用Logistic回归分析法分析其与H. pylori感染的关系。结果 H. pylori阳性胃癌组织及癌旁组织中PTEN及SOX2阳性率明显低于H. pylori阴性组织(P0.05),H. pylori阳性胃癌组织及癌旁组织中NF-κB p65阳性率明显高于H. pylori阴性组织(P0.05);胃癌组织PTEN、SOX2阳性率明显低于癌旁组织(P0.05),胃癌组织NF-κB p65阳性率明显高于癌旁组织(P0.05);经Logistic回归分析,胃癌组织PTEN、SOX2蛋白阳性表达降低H. pylori感染风险(OR=0.483、0.562,P0.05),NF-κB p65蛋白阳性表达增加H. pylori感染风险(OR=3.871,P0.05)。结论 H. pylori感染可导致早期胃癌组织中PTEN、SOX2蛋白表达降低,NF-κB p65蛋白表达升高,推测H. pylori可能通过影响PTEN、SOX2及NF-κB p65蛋白的表达而参与胃癌的发生、发展过程。     

幽门螺杆菌阳性消化性溃疡患者胃黏膜核因子κ B、β-防御素-2表达及其与胃窦炎症的关系

目的:检测幽门螺杆菌(H pylori)阳性消化性溃疡(peptic ulcer,PU)患者胃窦黏膜组织学改变和炎症相关基因核因子κB(Nuclear-κB, NF-κB)、人β-防御素-2(human β-denfensin-2, HBD-2)蛋白表达,探讨胃窦黏膜炎症及NF- κB、HBD-2在H pylori相关性PU中的作用及其意义．方法:57例PU患者,其H pylori感染者40例, 非H pylori感染者17例,另设正常对照组8例; 观察各组患者胃窦组织学改变,免疫组化法检测胃窦黏膜NF-κBp65、HBD-2的表达．观察 NF-κBp65、HBD-2的细胞定位情况,用One- Way ANOVA方法比较H pylori感染者与非 H pylori感染者及正常组胃黏膜NF-κBp65、 HBD-2表达量,并对PU不同分期患者胃黏膜 NF-κBp65,HBD-2的表达量进行比较;非参数统计方法分析H pylori感染与PU患者胃窦炎症程度的关系、NF-κBp65、HBD-2表达与胃窦炎症程度的关系及H pylori阳性PU NF- κBp65与HBD-2表达的相关性．结果:PU患者胃窦的炎症程度与H pylori感染程度呈正相关(活动性r=0．374,P<0．01:慢性r=0．333,P<0．05)．在H pylori阳性PU患者 NF-κBp65主要表达于胃黏膜上皮细胞和固有层间质细胞胞核,HBD-2主要表达于胃黏膜表层上皮细胞胞质,二者的表达均较H pylori 阴性组显著增强(6．4±3．28 vs 3．78±2．16, P<0．01;12．96±5．03 vs 4．69±2．05,P<0．01),且均与胃窦黏膜炎症程度具有显著相关性(活动性r=0．744,0．524,P<0．01,慢性r=0．650, 0．606,P<0．01);H pylori阳性PU胃黏膜NF- κBp65表达与HBD-2表达呈正相关关系(r= 0．438,P<0．01)．愈合期和疤痕期PU患者NF- κBp65(4．28±2．11．3．65±2．27)、HBD-2(8．15 ±4．28,6．24±3．71)的表达较活动期者(7．14± 3．24,13．56±5．43)显著降低(P<0．05,P<0．01)．结论:H pylori感染导致胃黏膜NF-κBp65． HBD-2表达增加,胃黏膜炎症程度增强．NF- κB可能通过诱导HBD-2的表达,参与胃窦黏膜炎症反应,从而影响了H Hpylori阳关性PU的病理生理过程．     

核因子-κB和血管内皮生长因子在胃癌中的表达及其意义

目的:探讨核因子-κB(NF-κB)和血管内皮生长因子(VEGF)在胃癌中的表达及其临床意义.方法:选取68例胃癌组织为实验对象,各对应的癌旁组织为对照组,并选取20例正常胃组织为正常对照组.采用免疫组织化学法(SABC)检测各样本的NF-κB和VEGF,并对相关的临床病理资料进行统计分析.结果:正常胃组织中未见NF-κB阳性表达及VEGF表达,胃癌细胞中阳性表达率均明显高于癌旁组织中(63.2% VS 2.9%,76.5% VS 14.7%,均P=0.000).NF-κB及VEGF在胃癌组织中的表达均与性别、年龄、组织学类型无关;NF-κB及VEGF在TNM分期(Ⅲ Ⅳ期)、有淋巴结转移、累及浆膜、有远处转移组阳性表达均明显高于TNM(Ⅰ Ⅱ期)、无淋巴结转移、未累及浆膜、无远处转移组(P＜0.05).胃癌中NF-κB与VEGF表达显著正相关(r=0.512,P=0.000).结论:NF-κB和VEGF在胃癌中呈现高表达,且两者存在明显相关,NF-κB可能通过上调VEGF的表达促进胃癌的发生发展.     

幽门螺杆菌相关性十二指肠球溃疡与胃癌中NF—KB、VEGF、Bcl-2、IL-1β的表达及意义

目的探讨Hpylori相关性十二指肠溃疡与胃癌病例中NF—KB、Bcl-2、VEGF、IL-1β表达的差异及相互关系，进一步了解Hpylori致胃癌与十二指肠溃疡的发病机制。方法选取胃镜检查的胃黏膜活检标本，十二指肠溃疡患者33例，胃癌患者63例，通过免疫组化sP法测定NF—KB、Bcl-2、VEGF、IL-1β在H．pylori感染与非感染的胃癌及十二指肠溃疡患者胃黏膜中的表达情况。结果十二指肠溃疡组和胃癌组中，H．pylori感染者NF—KB、VEGF与IL-1β的表达水平高于npylori阴性者（P〈0．Ol或0．05），Bcl-2的表达无显著差异（P〉0．05）；H．pylori感染病例中，NF—KB、Bcl-2、VEGF在胃癌组的表达水平高于十二指肠溃疡组（P〈0．01或0．05），IL-1β的表达无显著差异（P〉0．05）；胃癌组与球溃疡组中，NF—KB的表达水平与VEGF均呈正相关（P〈0．05）；胃癌组巾，NF—KB和VEGF的表达水平与Bcl-2呈正相关（P〈0．05），与IL-1β表达水平无明显相关性（P〉0．05）；球溃疡组中，NF—KB和VEGF的表达水平与IL-1β表达水平呈正相关（P〈0．05），与Bcl-2表达水平无明显相关性（P〉0．05）．结论幽门螺杆菌感染可上调宿主胃黏膜上皮NF—KB、VEGF及IL-1β的表达，三者表达水平具有协同性，其中NF—KB、VEGF表达的差异与十二指肠溃疡与胃癌两种不同的疾病转归相关，     

人胃腺癌中NF-κBp65、VEGF、Survivin的表达及意义

目的通过检测胃腺癌组织中NF-κBp65、VEGF、Survivin的表达情况，探讨它们在胃腺癌发生发展过程中的作用以及相互作用关系。方法应用免疫组织化学sP法，检测73例胃癌组织及20例正常胃黏膜组织中NF-κBp65、VEGF、Survivin的表达情况，并分析其与胃癌临床病理特征之间的关系。结果NF-κBp65、VEGF、Survivin在胃腺癌中的表达率分别为58．9％、72．6％、46．6％，而在正常胃黏膜组织则表达不明显或不表达，两者差异有统计学意义（P〈0．05）。NF-κBp65、VEGF、Survivin的表达与浸润深度、淋巴结转移、临床分期均密切相关（P〈0．05），NF-κBp65的表达亦与胃腺癌分化程度有关（P〈0．05）。NF-κBp65蛋白的表达与VEGF及Survivin蛋白的表达均呈显著正相关，VEGF与Survivin的表达亦呈显著正相关。结论NF-κBp65通过上调VEGF及Survivin的表达促进胃腺癌的发生发展；VEGF与Survivin在胃腺癌的发生发展中存在着协同作用。     

NF-κB、VEGF蛋白在胃癌组织中的表达及临床意义

目的 探讨NF-κB、血管内皮生长因子（VEGF）蛋白在胃癌发生、发展及浸润、转移中的作用.方法 应用免疫组化SP法检测NF-κB、VEGF蛋白在45份胃癌组织及其癌旁正常组织、30份萎缩性胃炎组织中的表达情况,分析两者表达相关性及与胃癌临床病理学特征的关系.结果 NF-κB、VEGF蛋白在胃癌组织、萎缩性胃炎组织和正常组织中的阳性表达率均逐渐升高,两两比较P均＜0.05;NF-κB、VEGF蛋白表达均与胃癌分化程度、淋巴结转移有关（P＜0.05）,均与年龄、性别、浸润深度无关;NF-κB蛋白和VEGF蛋白在胃癌组织中的表达呈正相关（r=0.403,P＜0.05）.结论 NF-κB、VEGF蛋白高表达在胃癌发生、发展和浸润转移中可能起重要协同作用.     

胃癌组织与血清中VEGF和bFGF的表达意义

目的：研究胃癌患者血清和组织中VEGF,bFGF的表达与胃癌临床特征之间的关系,研究二者的相关性及组织和血清之间的相关性,探讨VEGF,bFGF在胃癌的发生、发展、侵袭和转移中的作用方法：应用酶联免疫技术(ABC-ELISA方法)检测73例胃癌患者术前血清和20例健康体检者血清中的VEGF,bFGF的表达水平,同时应用免疫组织化学染色方法检测癌组织和癌旁组织中VEGF,bFGF的表达．结果：胃癌患者术前血清VEGF,bFGF表达水平均明显高于健康体检者(YEGF：101．8±53．3 ng/L vs 16．1±22．5ng/L,P＜0．05；bFGF：152．9±42．7ng/L vs 25．0±11．4ng/L,P＜0．05)．胃癌患者术前血清VEGF,bFGF的表达水平均随胃癌的浸润深度、TNM分期、淋巴结转移、远处转移而增高(P＜0．05),而与年龄、性别及病理类型无关．胃癌组织VEGF的阳性表达率为71．2%,癌旁组织中VEGF均未见阳性表达,二者之间有显著性差异(X~2=32．1,P＜0．05)；胃癌组织中bFGF的阳性表达率为63．0%、癌旁组织中bFGF阳性表达率为(10%),二者之间亦有显著性差异(X~2=17．7,P＜0．05)．胃癌患者组织VEGF,bFGF的表达水平均与胃癌的浸润深度、TNM分期、淋巴结转移、远处转移有关(P＜0．05),而与年龄、性别及病理类型无关．胃癌患者血清VEGF的表达水平与血清bFGF的表达水平呈明显正相关(r=0．439,P＜0．01),胃癌患者组织VEGF的表达水平与组织bFGF的表达水平呈明显正相关(r=0．391,P＜0．01)；胃癌患者术前血清VEGF的表达水平与组织VEGF的表达呈正相关(r=0．346,P＜0．01),术前血清bFGF的表达水平与组织bFGF的表达呈正相关(r=0．304,P＜0．01),均有显著性差异．结论：VEGF,bFGF在胃癌的发生、发展、转移及预后起着重要的作用,有望成为胃癌术前诊断、术后随访、复发转移监测、评价抗血管生成药物疗效和化疗效果判定的新的肿瘤标志物．     

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.     

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.     

血管内皮生长因子表达在胃癌浸润转移中的作用

目的探讨血管内皮生长因子（VEGF）在胃癌组织中表达及其与临床特征之间的关系。方法材料取自瑞金医院外科1988年～1991年间手术切除标本，共128例。研究方法按LSAB法免疫组织化学操作技术常规进行，抗人VEGF单克隆抗体及抗人因子Ⅷ相关抗原单克隆抗体分别用于检测肿瘤组织内的VEGF蛋白和微血管数（MVC）。结果128例胃癌组织中，VEGF表达阳性率为6O．9％（78／128）。VEGF表达阳性肿瘤的MVC明显高于阴性者（P＜0．005）.高水平的VEGF表达与肿瘤的浸润性生长、浆膜浸润、淋巴结转移和肝转移具有明显相关关系。此外，VEGF表达阳性者的复发率高于阴性者，阳性者的预后明显较阴性者差。多因素分析表明，VEGF表达是胃癌的一个独立预后因子。结论VEGF可能通过刺激新生血管形成，与胃癌的恶性进程和不良预后有密切关系。     

三叶因子2表达与胃溃疡易感性的相关研究

目的　三叶因子 (trefoilfactor)是一组新发现的对胃肠道有保护作用的多肽类物质 ,通过对三叶因子 2 (TFF2 )mRNA在胃溃疡与浅表性胃炎患者胃黏膜中表达水平的差异研究 ,探讨其在胃溃疡发病机制中的作用。方法　胃镜下钳取 32例胃溃疡内侧缘、溃疡远处和 36例浅表性胃炎患者的组织标本 ,利用原位杂交方法分别对不同组织中TFF2mRNA进行定位和半定量测定 ,比较TFF2mRNA在各组中的表达差异。结果　TFF2mRNA主要分布于胃小凹基底部的柱状细胞、幽门腺腺泡及导管细胞中。TFF2mRNA在浅表性胃炎组的表达高于胃溃疡内侧缘组 ,在胃溃疡内侧缘表达要高于溃疡 5cm外的胃黏膜 ,但组间表达差异无显著性 (P均 >0 .0 5 ) ,而浅表性胃炎标本TFF2mRNA阳性程度显著高于溃疡外 5cm组 (P <0 .0 5 )。结论　TFF2mRNA在胃黏膜中广泛分布 ,胃溃疡患者胃黏膜中TFF2mRNA的低表达可能是胃溃疡易患因素之一。     

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…     

促凋亡因子与凋亡抑制蛋白在胃溃疡组织中的表达

目的在探讨促凋亡因子(Smac)与生存素(Survivin)在胃溃疡组织中的表达。方法收集无癌前病变胃溃疡患者60例、癌前病变胃溃疡患者30例局部病变标本,以实时荧光定量逆转录PCR法检测标本中Smac及Survivin mRNA;免疫组化SP法检测标本中Smac与Survivin表达。结果癌前病变溃疡组织中Smac mRNA表达量为0.74±0.25,低于无癌前病变溃疡组织(1.18±0.14,P0.05),癌前病变溃疡组织中Survivin mRNA表达量为3.21±1.03,高于无癌前病变溃疡组织(1.73±0.74,P0.05);凋亡细胞在无癌前病变溃疡治疗前组织中较多,凋亡指数为(18.23±3.62)%,溃疡愈合后凋亡指数为(5.16±0.98)%,治疗溃疡愈合后较治疗前明显降低(P0.05);在无癌前病变溃疡组织中Smac的阳性表达多为++~+++,在有癌前病变溃疡组织中Survivin阳性表达多为+~++,Smac与Survivin在不同类型的胃溃疡组织中的表达强度等级比较差异具有统计学意义(P0.05)。结论无癌前病变胃溃疡和癌前病变胃溃疡组织中的Smac与Survivin表达强度不同,无癌前病变胃溃疡组织中Survivin表达强度较高,癌前病变胃溃疡组织中Smac表达强度明显降低。     

CD74 and macrophage migration inhibitory factor as therapeutic targets in gastric cancer

AIM: To investigate the relationship and molecular features of CD74/macrophage migration inhibitory factor (MIF)/Toll-like receptor 4 (TLR4) in gastric cancer.METHODS: CD74, MIF and TLR4 expression in the paraffin-embedded sections of gastric cancer from 120 patients were detected by immunohistochemical staining. Knock down of CD74 expression in gastric cancer cell line MKN-45 was performed by lentivirus transduction and detected by Western blotting. MKN-45 cell proliferation assay under the stimulants was measured by the cell counting kit 8 (CCK8) assay and MIF concentration in the culture medium was detected by enzyme-linked immunosorbent assay. Surface staining of CD74 in the MKN-45 cell line under the stimulation of lipopolysaccharide (LPS) was measured by flow cytometry. MIF, CD74 and TLR4 co-localization in the MKN-45 cell line was performed by the immunoprecipitation.RESULTS: CD74, MIF and TLR4 were found to be expressed in gastric cancer and increased significantly in the advanced stage, and were also associated with lymph node metastasis. Correlation analysis revealed that CD74 was positively correlated with MIF (r = 0.2367, P < 0.01) and both proteins were also associated with TLR4 (r = 0.4414, r = 0.5001, respectively, P < 0.01). LPS can significantly promote MKN-45 cell proliferation (3.027 ± 0.388 vs 4.201 ± 0.092, P < 0.05), induce MIF production (54.333 ± 2.906 pg/mL vs 29.667 ± 3.180 pg/mL, P < 0.01) and cell surface expression of CD74 (75.6% ± 4.046% vs 9.4% ± 0.964%, P < 0.01) at LPS concentration of 1 μg/mL compared to medium control. Knockdown of CD74 or using anti-CD74 and MIF antagonist ISO-1 significantly reduced LPS-induced MKN-45 cell proliferation (4.201 ± 0.092 vs 3.337 ± 0.087, 4.534 ± 0.222 vs 3.368 ± 0.290, 4.058 ± 0.292 vs 2.934 ± 0.197, respectively, P < 0.01). MIF, CD74 and TLR4 could co-localize in the MKN-45 cell line.CONCLUSION: Upregulation of MIF, CD74 and TLR4 are associated with increasing clinical stage and provide an opportunity as novel gastric cancer chemoprevention and/or treatment strategy.     

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CyclinD1和VEGF的表达及意义

目的　探讨 Cyclin D1 和 VEGF与胃癌分型、分期、浸润转移等生物学行为的关系及二者之间的相关性。方法　应用免疫组织化学链霉素抗生物素蛋白 -过氧化物酶法 (S- P)检测各期胃癌 (共 5 7例 )组织中Cyclin D1 和 VEGF的表达。结果　 Cyclin D1 表达与胃癌分化程度密切相关 ,与肿瘤浸润深度、淋巴结转移及TNM分期无关 ;VEGF的表达与胃癌的分化程度、肿瘤浸润深度、淋巴结转移、TNM分期均密切相关。在胃癌组织中 Cyclin D1 和 VEGF的表达呈正相关。结论　 Cyclin D1 过表达参与了胃癌的发生 ,VEGF促进胃癌的增长 ,促使肿瘤向黏膜深层浸润并向远处转移。Cyclin D1 和 VEGF在胃癌的发生中起协同作用 ,其表达与 TNM分期密切相关 ,二者联合检测可作为胃癌手术治疗及预后评估的参考指标