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The Role of Ionizing Radiation in Alzheimer’s Disease

电离辐射在阿尔茨海默病中的作用

基本信息

批准号：
10288222
负责人：
Max Brenner
金额：
$ 41.88万
依托单位：
FEINSTEIN INSTITUTE FOR MEDICAL RESEARCH
依托单位国家：
美国
项目类别：
财政年份：
2017
资助国家：
美国
起止时间：
2017-06-07 至 2022-05-31
项目状态：
已结题

来源：
https://reporter.nih.gov/project-details/10288222
关键词：
Administrative Supplement Adult Affect Alzheimer&apos s Disease Alzheimer&apos s disease model Alzheimer&apos s disease patient Antibodies Attenuated Brain Cause of Death Cells Cerebrospinal Fluid Congenic Mice Development Dose Enzyme-Linked Immunosorbent Assay Etiology Exposure to Female Future Genome Goals Hour ITGAM gene Immunoglobulin G Immunohistochemistry Impaired cognition Injections Injury Interleukin 6 Receptor Interleukin Activation Ionizing radiation Knock-out Link MAPT gene Measures Mediator of activation protein Microglia Molecular Mus Myelogenous Nerve Degeneration Neuraxis Neurofibrillary Tangles Neurons Oligopeptides Pathogenesis Pathologic Pathology Pathway interactions Patients Pattern Peptides Phagocytes Phosphotransferases Process RNA-Binding Proteins Radiation Radiation Dose Unit Radiation Injuries Radiation exposure Recombinants Role STAT3 gene Saline Serum Source Tauopathies Therapeutic Time Tissues Transgenic Organisms Up-Regulation Whole-Body Irradiation base congenic experimental study extracellular inhibitor/antagonist insight interleukin-6 receptor alpha irradiation macrophage male monocyte mortality neurodegenerative dementia novel polyclonal antibody public health relevance systemic inflammatory response tau Proteins tau aggregation tau phosphorylation tau-1 tissue injury

项目摘要

PROJECT DESCRIPTION: The goal of this Administrative Supplement project is to determine whether extracellular cold inducible RNA-binding protein (eCIRP), a damage-associated molecular pattern (DAMP) molecule, is released by microglial cells upon radiation exposure and leads to tau pathology in Alzheimer’s disease (AD). AD is the 6th leading cause of death in the US and the most common form of neurodegenerative dementia. Although studies have linked ionizing radiation exposure to cognitive dysfunction, the role of radiation injury in the etiology of AD has not been sufficiently explored. eCIRP is known to be released by irradiated cells and activated macrophages, and our preliminary studies have shown that serum levels of eCIRP are elevated after total body irradiation (TBI), raising the possibility that TBI may cause microglial cells to release eCIRP in the central nervous system. Indeed, we discovered that eCIRP was increased in the cerebrospinal fluid of AD patients. Moreover, eCIRP increased tau phosphorylation and upregulated the Cdk5 hyperactivator p25 via eCIRP’s activation of the interleukin-6 receptor α (IL-6Rα)/STAT3 pathway. We also showed that the eCIRP competitive antagonist small peptide C23 inhibited eCIRP’s activation of IL-6Rα/STAT3 and upregulation of p25. Based on these novel findings, we hypothesize that ionizing radiation induces microglial cells to release eCIRP in the brain, leading to pathological tau phosphorylation and aggregation. Moreover, we further hypothesize that treatment with C23 attenuates the development of radiation-induced tau pathology. In this project, we plan to determine the effects of irradiation and the contribution of microglial cells to brain eCIRP release. We will then demonstrate the role of eCIRP in the induction of AD-like pathological tau phosphorylation and aggregation after irradiation. Finally, we will conduct a proof-of-concept study to evaluate whether eCIRP antagonism with C23 attenuates pathological tau phosphorylation and aggregation after TBI. Our studies will provide novel pivotal insights into the precise role of ionizing radiation in the pathogenesis of AD, as well as new potential therapeutic strategies for treating AD patients in the future.

项目描述：本行政补充项目的目标是确定是否