Mechanisms and indicators of inflammasome signaling in Parkinson’s disease

帕金森病炎症小体信号传导机制和指标

• 批准号: 10687222
• 负责人: Matthew Charles Havrda
• 金额: $ 60.69万
• 依托单位: DARTMOUTH COLLEGE
• 依托单位国家: 美国
• 财政年份: 2021
• 资助国家: 美国
• 起止时间: 2021-09-21 至 2024-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10687222
• 关键词: Address; Anti-Inflammatory Agents; Attenuated; Biological Assay; Biology; Blood specimen; Bone Marrow; Cell Death; Cells; Cellular Stress; Chronic; Clinical Data; Clinical Trials; Complex; Data; Data Set; Development; Disease model; Employment; Exposure to; Foundations; GTP-Binding Protein Regulators; Heavy Metals; Homeostasis; Immune; Immune response; Immune system; Immunology; Inflammasome; Inflammation; Inflammation Mediators; Inflammatory; Inflammatory Response; Innate Immune System; Intervention; Macrophage; Mediating; Medical center; Military Personnel; Mitochondria; Modeling; Molecular; Monitor; Mus; Myelogenous; Myeloid Cells; Nerve Degeneration; Neurodegenerative Disorders; Occupations; Oxidative Stress; Parkinson Disease; Participant; Pathogenesis; Patients; Pattern Recognition; Peripheral; Pesticides; Pharmaceutical Preparations; Phenotype; Pilot Projects; Plasma; Populations at Risk; Process; Proteins; RGS Proteins; Reporting; Research; Resolution; Risk; Role; Rotenone; Signal Transduction; Site; Surveys; Symptoms; System; Time; Toxic Environmental Substances; Toxicant exposure; Work; age related neurodegeneration; associated symptom; cell injury; cell type; clinically relevant; cytokine; diagnostic tool; epidemiologic data; experience; follow-up; gain of function; gene environment interaction; improved; innovation; lifestyle data; military veteran; motor impairment; mouse model; neuroinflammation; neuropathology; neuroprotection; patient population; pesticide exposure; pre-clinical; response; symptomatology; toxicant

PROJECT SUMMARY The ViCTER Consortium has been established to characterize mechanisms of inflammation in the peripheral myeloid immune compartment, determine their impact on pesticide-driven neurodegeneration, and see if plasma- borne indicators of these processes are associated with military occupation and Parkinson’s disease (PD). It is widely accepted that complex gene-environment interactions underlie the risk of PD. Our work in pesticide- exposed mice and PD patients indicates that environmental toxicants converge on the NLRP3 inflammasome. Inflammasomes are intracellular multi-protein pattern recognition complexes that initiate and propagate inflammation in response to cellular damage and stress associated with the reversible process of pyroptotic cell death. The NLRP3 inflammasome has emerged as a key mediator of inflammation in PD, in part because it can sense non-microbial inflammatory triggers commonly associated with chronic, age-related neurodegenerative disorders. NLRP3 inflammasome triggers identified in models of PD include pesticides, heavy metals, mitochondrial and oxidative stress, and proteinaceous insult. Environmental toxicant exposure is often systemic and there is a growing appreciation of the role of the peripheral immune system in the response to toxicants and the progression of PD. Characterizing PD-related mechanisms in peripheral immune cells may help to identify signatures relevant to the progression of PD. Our studies in mice systemically exposed to rotenone identify a Nlrp3-dependent peripheral immune response co-occurring with nigral neurodegeneration. Our study of PD patients identified easily detectable plasma-borne indicators of NLRP3 inflammasome activity and elevated plasma NLRP3 protein in PD patients, potentially related to military employment. These data provide a compelling backdrop for our proposed characterization of peripheral NLRP3 activity in the context of PD. We have developed innovative mouse models based on CRE-driven cell-type specific Nlrp3 gain-of-function. We will limit Nlrp3 expression to peripheral myeloid cells and characterize the peripheral immune response, neuroinflammation, and nigral neurodegeneration using an established rotenone exposure-based PD model. In a second aim, we follow up on pilot studies to determine if the anti-inflammatory neuroprotective protein Regulator of G-protein Signaling 10 (RGS10) functions to resolve NLRP3-inflammasome signaling. In a third Aim, we team with the White River Junction VA Medical Center to evaluate subjects with prior military experience, using established assays to characterize the relationship between circulating inflammasome-related proteins, military occupation, and PD. Our ViCTER Consortium brings together experts in NLRP3 and toxicant-based models of PD, RGS10 and PD-related immunology, and patient-based studies. The collaborators will employ interdisciplinary strategies to characterize clinically relevant inflammatory mechanisms and inflammasome activity in an at-risk patient population. Studies will provide a foundation for the development of diagnostic tools and therapies to monitor, stratify, and treat PD.

项目总结