Mechanism of Abeta Sequestration

Abeta 封存机制

• 批准号: 8020909
• 负责人: RAYMOND SCOTT TURNER
• 金额: $ 26.7万
• 依托单位: GEORGETOWN UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-02-01 至 2012-01-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8020909
• 关键词: Active Immunization; Adverse effects; Affinity; Alzheimer' s Disease; Amyloid beta-Protein; Amyloidosis; Antibodies; Binding; Biological Markers; Brain; Clinical; Clinical Trials; Development; Disease; Encephalitis; Functional disorder; Future; Generations; Genes; Human; Immune; Immunization; Inflammatory; Memory; Methodology; Molecular; Mutation; Nerve Degeneration; Patients; Phagocytosis; Pharmaceutical Preparations; Plasma; Property; Reaction; Reporting; Research Proposals; Site; Therapeutic; Therapeutic Agents; Transgenic Mice; Transgenic Model; Translating; Vaccine Therapy; Vaccines; base; design; drug development; familial Alzheimer disease; flexibility; follow-up; immunoregulation; therapeutic development

DESCRIPTION (provided by applicant): Alzheimer's disease (AD) is a neurodegenerative affliction associated with memory dysfunction. Pathological mutations in familial AD patients have been identified in several genes, and transgenic mice carrying pathological genes have been generated. The generation of transgenic models of amyloidosis has significantly aided progress in the development of therapeutic approaches designed to lower brain amyloid beta (Abeta) load. One of these approaches is called "immunization". Immunologically provoked (or passively administered) antibodies against Abeta have been shown to enhance microglial phagocytosis and reduce Abeta load in the brains of transgenic mice. Significantly, immunization also reversed Abeta associated memory dysfunction. Concomitant with reduced CNS Abeta is the simultaneous observation by us and others that plasma Abeta levels are significantly elevated following immunization. As a result of this observation, we have devised a new methodology to alter brain Abeta load, which has proved to be effective in preliminary studies. In the human active immunization clinical trial, Abeta vaccine approach was terminated after severe brain inflammation was found approximately in 6% of patients. The cause of brain inflammatory side effects is not clear yet, but it is most likely due to immune modulation. Although the first clinical trial of vaccine therapy was terminated, follow up reports are encouraging. Sequestration approach does not modulate immune reaction; therefore, it therapy has higher flexibility in drug development, and drugs based on sequestration approaches have less side effects. In addition, plasma Abeta elevation is a possible biomarker when this approach translates to clinical use. In this study, we will investigate the mechanism of Abeta sequestration mechanism and identify optimal molecular property and drugable target for future development of pharmacological therapy.

描述（由申请人提供）：阿尔茨海默病（AD）是一种与记忆功能障碍相关的神经退行性疾病。已鉴定出家族性AD患者的多个基因存在病理突变，并产生了携带病理基因的转基因小鼠。淀粉样变性转基因模型的产生极大地促进了旨在降低大脑β淀粉样蛋白（Abeta）负荷的治疗方法的开发进展。这些方法之一称为“免疫”。免疫激发（或被动施用）的 Abeta 抗体已被证明可以增强小胶质细胞的吞噬作用并减少转基因小鼠大脑中的 Abeta 负荷。值得注意的是，免疫还逆转了 Abeta 相关的记忆功能障碍。伴随中枢神经系统 Abeta 降低，我们和其他人同时观察到，免疫后血浆 Abeta 水平显着升高。根据这一观察结果，我们设计了一种改变大脑 Abeta 负荷的新方法，该方法在初步研究中已被证明是有效的。在人类主动免疫临床试验中，大约6%的患者发现严重脑部炎症后，Abeta疫苗方法被终止。大脑炎症副作用的原因尚不清楚，但很可能是由于免疫调节所致。尽管疫苗治疗的首次临床试验被终止，但后续报告令人鼓舞。隔离方法不调节免疫反应；因此，IT疗法在药物开发方面具有更高的灵活性，并且基于隔离方法的药物副作用较小。此外，当这种方法转化为临床应用时，血浆 Abeta 升高是一个可能的生物标志物。在本研究中，我们将研究 Abeta 隔离机制，并为未来药物治疗的发展确定最佳分子特性和药物靶点。

项目成果

Cyclooxygenase-1 inhibition reduces amyloid pathology and improves memory deficits in a mouse model of Alzheimer's disease.

抑制 Cyclooxygenase-1 可以减少阿尔茨海默病小鼠模型中的淀粉样蛋白病理并改善记忆缺陷。

• 发表时间: 2013-01
• 影响因子: 4.7
• 作者: Choi, Sang;Aid, Saba;Caracciolo, Luca;Minami, S Sakura;Niikura, Takako;Matsuoka, Yasuji;Turner, R Scott;Mattson, Mark P;Bosetti, Francesca
• 通讯作者: Bosetti, Francesca

ApoE receptor 2 regulates synapse and dendritic spine formation.

ApoE 受体 2 调节突触和树突棘的形成。

• 发表时间: 2011-02-15
• 影响因子: 3.7
• 作者: Dumanis, Sonya B;Cha, Hyun;Song, Jung Min;Trotter, Justin H;Spitzer, Matthew;Lee, Ji;Weeber, Edwin J;Turner, R Scott;Pak, Daniel T S;Rebeck, G William;Hoe, Hyang
• 通讯作者: Hoe, Hyang

Mercaptoacetamide-based class II HDAC inhibitor lowers Aβ levels and improves learning and memory in a mouse model of Alzheimer's disease.

基于巯基乙酰胺的 II 类 HDAC 抑制剂可降低阿尔茨海默病小鼠模型的 Aβ 水平并改善学习和记忆。

• 发表时间: 2013-01
• 影响因子: 5.3
• 作者: Sung, You Me;Lee, Taehee;Yoon, Hyejin;DiBattista, Amanda Marie;Song, Jung Min;Sohn, Yoojin;Moffat, Emily Isabella;Turner, R Scott;Jung, Mira;Kim, Jungsu;Hoe, Hyang
• 通讯作者: Hoe, Hyang

Decreased dendritic spine density and abnormal spine morphology in Fyn knockout mice.

Fyn 敲除小鼠的树突棘密度降低和脊柱形态异常。

• 发表时间: 2011-09-30
• 影响因子: 2.9
• 作者: Babus, Lenard W;Little, Elizabeth M;Keenoy, Kathleen E;Minami, S Sakura;Chen, Eric;Song, Jung Min;Caviness, Juliet;Koo, So;Pak, Daniel T S;Rebeck, G William;Turner, R Scott;Hoe, Hyang
• 通讯作者: Hoe, Hyang

Therapeutic versus neuroinflammatory effects of passive immunization is dependent on Aβ/amyloid burden in a transgenic mouse model of Alzheimer's disease.

被动免疫的治疗效果与神经炎症效果取决于阿尔茨海默氏病转基因小鼠模型中的 Aβ/淀粉样蛋白负荷。

• 发表时间: 2010
• 作者: Minami, S Sakura;Sidahmed, Elkhansa;Aid, Saba;Shimoji, Mika;Niikura, Takako;Mocchetti, Italo;Rebeck, G William;Prendergast, Jay S;Dealwis, Chris;Wetzel, Ronald;Bosetti, Francesca;Matsuoka, Yasuji;Hoe, Hyang;Turner, R Scott
• 通讯作者: Turner, R Scott