Background and Objectives: Increased expression of the CD97, nuclear factor-kB (NF-kB) and cyclooxygenase-2 (COX-2) has been found to play an important role in development of many cancers, including gastric neoplasm. ...Background and Objectives: Increased expression of the CD97, nuclear factor-kB (NF-kB) and cyclooxygenase-2 (COX-2) has been found to play an important role in development of many cancers, including gastric neoplasm. However, the expression and biological behavior of CD97, NF-kB and COX-2 in gastric MALT (mucosa-associated lymphoid tissue) lymphoma has not been well investigated. Methods: The expressions of CD97, COX-2 and NF-kB in 47 cases of gastric MALT lymphoma were detected immunohistochemically, and the relevance between their expressions and the biological behavior was analyzed retrospectively. Results: 1) The expressions of CD97, NF-kB and COX-2 were 87.2%, 36.2% and 48.9%, respectively;2) The difference of CD97 expression between depth of invasion limited in mucosa and submucosa and beyond muscularis propria was significant (100.0% vs. 71.4%, P < 0.01). Moreover, the expression of nuclear CD97 between stage IIE, III, IV and stage I patients showed significant difference (96.4% vs. 73.7%, P < 0.05);3) The expression of NF-kB was significantly correlated with tumor size, depth of invasion and stage;4) The expression of COX-2 was significantly correlated with Helicobacter pylori infection, clinical stage, depth of invasion and tumor size (P < 0.05). Conclusions: Expressions of CD97, NF-κB and COX-2 were correlated with tumor invasion and metastasis in gastric MALT lymphoma.展开更多
目的研究10号染色体缺失张力蛋白磷酸酶(phosphatase and tensin homologue deleted on chromosome ten,PTEN)、磷酸化Akt(P-Akt)及核转录因子-κB(NF-κB)在中耳胆脂瘤上皮中的表达,探讨PI3K(phosphatidylinositol-3-kinase,磷脂酰肌...目的研究10号染色体缺失张力蛋白磷酸酶(phosphatase and tensin homologue deleted on chromosome ten,PTEN)、磷酸化Akt(P-Akt)及核转录因子-κB(NF-κB)在中耳胆脂瘤上皮中的表达,探讨PI3K(phosphatidylinositol-3-kinase,磷脂酰肌醇-3激酶)-Akt信号通路在中耳胆脂瘤上皮细胞过度增殖机制中的可能作用。方法采用免疫组织化学SP法(辣根酶标记链霉卵白素连接法,streptavidin-peroxidase conjugated method)检测30例中耳胆脂瘤组织标本与15例正常外耳道皮肤标本中PTEN、P-Akt及NF-κB蛋白的表达。结果 PTEN蛋白阳性表达主要定位于上皮细胞核,其在中耳胆脂瘤上皮中阳性表达率为36.7%,明显低于正常外耳道皮肤组的93.3%(P<0.01);P-Akt蛋白阳性表达主要定位于上皮细胞胞质,其在中耳胆脂瘤上皮中阳性表达率为70.0%,明显高于正常外耳道皮肤组的26.7%(P<0.01);NF-κB蛋白阳性表达定位于上皮细胞核,其在中耳胆脂瘤上皮中阳性表达率为63.3%,明显高于正常外耳道皮肤组的20.0%(P<0.01)。在30例中耳胆脂瘤上皮组织中,PTEN分别与P-Akt、NF-κB蛋白的表达之间呈显著负相关(P<0.01),而P-Akt和NF-κB蛋白的表达呈显著正相关(P<0.01)。结论 PTEN、P-Akt和NF-κB在中耳胆脂瘤上皮的异常表达可能在胆脂瘤的发生、发展过程中起重要作用。胆脂瘤上皮中PI3K-Akt信号通路的激活可能参与了胆脂瘤上皮细胞过度增殖机制。展开更多
目的:探讨NF-КB,血管紧张素Ⅱ-1型受体(ATIR)在非酒精性脂肪肝病(NAFLD)发病中的作用及其机制。方法:采用改良高脂饮食建立大鼠NAFLD模型,随机分为正常组普通饲料喂养,模型组高脂饮食喂养,干预组高脂饮食饲养10周后吡咯烷二硫基甲酸酯(...目的:探讨NF-КB,血管紧张素Ⅱ-1型受体(ATIR)在非酒精性脂肪肝病(NAFLD)发病中的作用及其机制。方法:采用改良高脂饮食建立大鼠NAFLD模型,随机分为正常组普通饲料喂养,模型组高脂饮食喂养,干预组高脂饮食饲养10周后吡咯烷二硫基甲酸酯(PDTC)腹腔注射4周,分别于10、14周处死各组大鼠,观察肝组织病理学形态;测定血管紧张素浓度;检测NF-KB蛋白、肝脏AT1R在肝细胞中的表达情况。结果:肝组织病理结果提示正常组肝组织结构正常;模型组大鼠肝组织出现脂肪变性并随造模时间的延长而加重,10、14周大鼠肝脏可见气球样变及程度不等的肝细胞坏死和小叶内炎症、腺泡内散在点灶状坏死,部分可见点灶状坏死成片,门管区轻中度炎症。14周大鼠出现胶原纤维生成。免疫组化结果提示模型组大鼠肝细胞内可见NF-КB明显活化,而且随造模时间延长,其表达随之增多;干预组表达低于同期模型组,但高于正常组。放免法结果提示模型组、干预组血管紧张素浓度均高于正常组,且随着造模时间的延长,其浓度逐渐增多;干预组血管紧张素浓度低于同时期模型组但高于正常组。RT-PCR法显示:AT1Rm RNA表达量在模型组中随着造模时间的延长,表达量逐渐增加,且均明显高于同时间段正常组;干预组表达低于同时期模型组但高于正常组。结论:NAFLD肝组织随着疾病程度加重,NF-КB活性增强,抑制其活性可降低NAFLD大鼠肝组织AT1R m RNA表达。展开更多
文摘Background and Objectives: Increased expression of the CD97, nuclear factor-kB (NF-kB) and cyclooxygenase-2 (COX-2) has been found to play an important role in development of many cancers, including gastric neoplasm. However, the expression and biological behavior of CD97, NF-kB and COX-2 in gastric MALT (mucosa-associated lymphoid tissue) lymphoma has not been well investigated. Methods: The expressions of CD97, COX-2 and NF-kB in 47 cases of gastric MALT lymphoma were detected immunohistochemically, and the relevance between their expressions and the biological behavior was analyzed retrospectively. Results: 1) The expressions of CD97, NF-kB and COX-2 were 87.2%, 36.2% and 48.9%, respectively;2) The difference of CD97 expression between depth of invasion limited in mucosa and submucosa and beyond muscularis propria was significant (100.0% vs. 71.4%, P < 0.01). Moreover, the expression of nuclear CD97 between stage IIE, III, IV and stage I patients showed significant difference (96.4% vs. 73.7%, P < 0.05);3) The expression of NF-kB was significantly correlated with tumor size, depth of invasion and stage;4) The expression of COX-2 was significantly correlated with Helicobacter pylori infection, clinical stage, depth of invasion and tumor size (P < 0.05). Conclusions: Expressions of CD97, NF-κB and COX-2 were correlated with tumor invasion and metastasis in gastric MALT lymphoma.
文摘目的:探讨NF-КB,血管紧张素Ⅱ-1型受体(ATIR)在非酒精性脂肪肝病(NAFLD)发病中的作用及其机制。方法:采用改良高脂饮食建立大鼠NAFLD模型,随机分为正常组普通饲料喂养,模型组高脂饮食喂养,干预组高脂饮食饲养10周后吡咯烷二硫基甲酸酯(PDTC)腹腔注射4周,分别于10、14周处死各组大鼠,观察肝组织病理学形态;测定血管紧张素浓度;检测NF-KB蛋白、肝脏AT1R在肝细胞中的表达情况。结果:肝组织病理结果提示正常组肝组织结构正常;模型组大鼠肝组织出现脂肪变性并随造模时间的延长而加重,10、14周大鼠肝脏可见气球样变及程度不等的肝细胞坏死和小叶内炎症、腺泡内散在点灶状坏死,部分可见点灶状坏死成片,门管区轻中度炎症。14周大鼠出现胶原纤维生成。免疫组化结果提示模型组大鼠肝细胞内可见NF-КB明显活化,而且随造模时间延长,其表达随之增多;干预组表达低于同期模型组,但高于正常组。放免法结果提示模型组、干预组血管紧张素浓度均高于正常组,且随着造模时间的延长,其浓度逐渐增多;干预组血管紧张素浓度低于同时期模型组但高于正常组。RT-PCR法显示:AT1Rm RNA表达量在模型组中随着造模时间的延长,表达量逐渐增加,且均明显高于同时间段正常组;干预组表达低于同时期模型组但高于正常组。结论:NAFLD肝组织随着疾病程度加重,NF-КB活性增强,抑制其活性可降低NAFLD大鼠肝组织AT1R m RNA表达。
