Study on molecules that negatively regulate ROS production in human granulocyes

负调节人粒细胞中ROS产生的分子研究

• 批准号: 23659518
• 负责人: MORIO Tomohiro
• 金额: $ 2.33万
• 依托单位: Tokyo Medical and Dental University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23659518/
• 关键词: 顆粒球; 活性酸素(ROS); シグナル伝達; リン酸化; Btk; Mal

We studied the roles of Btk and Btk-associated molecules in regulation of reactive oxygen species (ROS) production. The enzyme responsible for the respiratory burst is NADPH oxidase. In the absence of Btk, the adaptor Mal was associated with PI(3)K and PTKs at the plasma membrane, whereas in control resting neutrophils, Btk interacted with and confined Mal in the cytoplasm. These kinases were hyper-phosphorylated and were activated. We delved into the mechanism of PTK activation in the absence of Btk by looking into the negative regulator of PTKs (e.g. Csk/Cbp and phosphatases). We also generated wild type Mal and mutant Mal to check whether membrane translocation of Mal is critical for priming of neutrophils.Btk was also involved in regulation of over-production of ROS in eosinophils. We are now working on mast cells derived from Btk deficient patients to examine the role of Btk in production of chymase and tryptase. The role of Itk, Tec family kinase expressed mainly in T cells, in the regulation of ROS production in T cells is currently under investigation.Our data demonstrated the importance of Btk (and Mal) in negative regulation of ROS hyperproduction in granulocytes. Our data so far indicate that PH-domain defective Mal may inhibit priming of neutrophils, and thus the protein may be used for the prevention of hyper-activation of neutrophils in conditions such as sepsis.

我们研究了Btk和Btk相关分子在调节活性氧（ROS）产生中的作用。负责呼吸爆发的酶是NADPH氧化酶。在没有Btk的情况下，衔接子Mal与质膜上的PI（3）K和PTKs相关，而在对照静息中性粒细胞中，Btk与Mal相互作用并将其限制在细胞质中。这些激酶被过度磷酸化并被激活。我们通过研究PTKs的负调节因子（例如Csk/Cbp和磷酸酶）来深入研究在Btk不存在的情况下PTK激活的机制。我们还产生了野生型Mal和突变型Mal，以检查Mal的膜转位是否是中性粒细胞启动的关键。Btk也参与调节嗜酸性粒细胞中ROS的过度产生。我们现在正在研究Btk缺陷患者的肥大细胞，以研究Btk在类糜蛋白酶和类胰蛋白酶产生中的作用。主要在T细胞中表达的Tec家族激酶Itk在调节T细胞ROS产生中的作用目前正在研究中，我们的数据证实了Btk（和Mal）在负调节粒细胞ROS过度产生中的重要性。迄今为止，我们的数据表明PH结构域缺陷的Mal可以抑制嗜中性粒细胞的致敏，因此该蛋白质可以用于预防诸如败血症的病症中嗜中性粒细胞的过度活化。

项目成果

An old and new regulator of ROS production in neutrophils

中性粒细胞中 ROS 产生的新旧调节因子

• 发表时间: 2012
• 作者: Morio T;Morio T
• 通讯作者: Morio T

分類不能型免疫不全症の病態解明へのアプローチ

阐明无法分类的免疫缺陷疾病病理学的方法

• 发表时间: 2011
• 作者: 尾崎富美子;狩野博嗣;金兼弘和;野々山恵章;Sang-Kyou Lee;高木正稔;水谷修紀;森尾友宏;T Morio.;森尾友宏
• 通讯作者: 森尾友宏

先天性免疫不全症の病態解析,およびタンパク導入法を用いた治療法の探索

先天性免疫缺陷病的病理分析和利用蛋白质转移方法寻找治疗方法

• 发表时间: 2012
• 作者: 尾崎富美子;狩野博嗣;金兼弘和;野々山恵章;Sang-Kyou Lee;高木正稔;水谷修紀;森尾友宏
• 通讯作者: 森尾友宏

Amelioration of neurodegenerative diseases by cell death-induced cytoplasmic delivery of humanin.

• DOI: 10.1016/j.jconrel.2012.12.022
• 发表时间: 2013-03
• 期刊: Journal of controlled release : official journal of the Controlled Release Society
• 作者: T. Park;Seung-Hyung Kim;Yoonchul Shin;Nae-Hyun Lee;R. Lee;Jae-hyuck Shim;L. Glimcher;I. Mook-Jung;Eunji Cheong;Won-Ki Kim;F. Honda;T. Morio;Jong-Soon Lim;Sang-Kyou Lee

Recurrent mitral valve regurgitation with neutrophil infiltration in a patient with multiple aseptic abscesses.

多发性无菌脓肿患者复发性二尖瓣反流伴中性粒细胞浸润。

• 发表时间: 2014
• 期刊: Mod Rheumatol.
• 作者: Fukuda S;Nanki T;Morio T;Hasegawa H;Koike R;Miyasaka N.
• 通讯作者: Miyasaka N.