Role of thymocyte differentiation in the progression of primary biliary cirrhosis
胸腺细胞分化在原发性胆汁性肝硬化进展中的作用
基本信息
- 批准号:17590655
- 负责人:
- 金额:$ 2.24万
- 依托单位:
- 依托单位国家:日本
- 项目类别:Grant-in-Aid for Scientific Research (C)
- 财政年份:2005
- 资助国家:日本
- 起止时间:2005 至 2006
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Primary biliary cirrhosis (PBC) is an autoimmune liver disease characterized with nonsuprative destructive cholangitis that results in liver cirrhosis and liver failure. This disease is rather frequent in female older than 40s. In our previous study, menopausal changes were suggested as one of the most important trigger for the development of autoimmune responses to a variety of organs. Abrupt decrease in plasma estrogen levels may affect so much on the progression of this disease, we believe. Thus in this study, we inquired the development of thymocytes in estrogen deficient mice and proved impaired development of CD4+CD8+CD25+ thymocytes. Impaired development of thymocytes with TCR β in high intensity could be involved in the development of autoimmunity as these cells are potent enough to suppress B cell proliferation.In the two-year project, we showed B cell are more prominently proliferating in bone marrow and in the liver in estrogen deficient mice and exogeneous estrogens are able to attenuate B cell proliferation significantly. Therefore, we transferred allogeneic spleen cells to estrogen deficient mice and induced chronic cholangitis for assessing destructive changes of biliary epithelium and inflammatory changes. Destructive changes and inflammatory cell infiltration were apparently more severe in estrogen-deficient recipients than in wild type recipients. Exogenously administered estrogens were very potent to attenuate damages of biliary epithelium. From these observations we deduce that destruction of biliary epithelium via immunological mechanism could be deteriorated profoundly by estrogen deficiency in postmenopausal stage.
原发性胆汁性肝硬化(PBC)是一种自身免疫性肝病,其特征是非化脓性破坏性胆管炎,导致肝硬化和肝功能衰竭。这种疾病在40岁以上的女性中相当常见。在我们以前的研究中,绝经期的变化被认为是对各种器官产生自身免疫反应的最重要的触发因素之一。我们认为,血浆雌激素水平的突然下降可能对这种疾病的进展有很大影响。因此,在本研究中,我们探讨了雌激素缺乏小鼠胸腺细胞的发育,并证实了CD 4 + CD 8 + CD 25+胸腺细胞的发育受损。在为期两年的研究中,我们发现雌激素缺乏小鼠骨髓和肝脏中的B细胞增殖更为显著,外源性雌激素能显著抑制B细胞增殖。因此,我们将同种异体脾细胞转移到雌激素缺乏的小鼠,并诱导慢性胆管炎,以评估胆管上皮的破坏性变化和炎症变化。雌激素缺乏受体的破坏性改变和炎性细胞浸润明显比野生型受体严重。外源性雌激素对胆管上皮损伤有明显的保护作用。从这些观察结果,我们推断,通过免疫机制的破坏,胆道上皮细胞可严重恶化雌激素缺乏症在绝经后阶段。
项目成果
期刊论文数量(38)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Similar anti-mitochondrial antibody reactivity profiles in familial primary biliary cirrhosis.
家族性原发性胆汁性肝硬化中类似的抗线粒体抗体反应性特征。
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:Y.Hayase;et al.
- 通讯作者:et al.
NASH の治療
NASH 的治疗
- DOI:
- 发表时间:2005
- 期刊:
- 影响因子:0
- 作者:Lin T;Sakata H;Ootani A;Fujise T;Tsunada S;Amemori S;Danjo A;Yokoyama F;Sakata Y;Iwakiri R;Toda S;Fujimoto K.;Togashi T;西原利治
- 通讯作者:西原利治
CYP17 polymorphism as a risk factor of tamoxifen-induced hepatic steatosis in breast cancer patients
CYP17多态性是乳腺癌患者他莫昔芬诱导肝脂肪变性的危险因素
- DOI:
- 发表时间:2004
- 期刊:
- 影响因子:0
- 作者:T.Ohnishi;et al.
- 通讯作者:et al.
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