Activation of Nrf2 during embryonic development - mechanisms and consequences

胚胎发育过程中 Nrf2 的激活 - 机制和后果

基本信息

批准号：
10467508
负责人：
Alicia R Timme-Laragy
金额：
$ 48.86万
依托单位：
UNIVERSITY OF MASSACHUSETTS AMHERST
依托单位国家：
美国
项目类别：
财政年份：
2016
资助国家：
美国
起止时间：
2016-06-01 至 2026-12-31
项目状态：
未结题

来源：
https://reporter.nih.gov/project-details/10467508
关键词：
Adolescent Age Age of Onset Anabolism Antioxidants B-Cell Development Beta Cell Biological Assay Biological Markers Biology Cell Culture Techniques Cell Death Cell Maturation Cell physiology Cells Characteristics Chemical Exposure Chemicals Clinical Complex Confocal Microscopy Cysteine Data Defect Development Diabetes Mellitus Disease Dose Elderly Embryo Embryonic Development Environment Environmental Exposure Exposure to Film Fructosamine Functional disorder Funding Future Glutathione Goals Guidelines Health Health Policy Human Hybrids Immunofluorescence Immunologic Impairment Individual Insulin Intervention Laboratories Lead Life Link Mediating Metabolic Metabolic Diseases Metabolic dysfunction Modeling Non-Insulin-Dependent Diabetes Mellitus Organogenesis Oxidation-Reduction Oxidative Stress Pancreas Pathologic Play Poly-fluoroalkyl substances Post-Translational Protein Processing Prediabetes syndrome Predisposition Production Proinsulin Proteomics Public Health Publications Publishing Reactive Oxygen Species Reporting Role Science Signal Pathway Signal Transduction Stress Structure of beta Cell of islet Techniques Testing Time Tissues Toxic effect Toxicant exposure Transcriptional Activation Transgenic Organisms Translating Uncertainty Variant Work Youth Zebrafish aqueous base blastomere structure chemical genetics developmental toxicology disorder risk disulfide bond endocrine pancreas development epidemiology study ethnic minority genetic approach in vivo islet malformation mutant novel oxidation persistent organic pollutants prevent receptor binding resilience response single-cell RNA sequencing stressor toxicant transcription factor

项目摘要

Abstract Early life stage exposures to toxicants can result in islet malformations, which may predispose individuals to diabetes. The glutathione redox microenvironment plays fundamental roles in embryonic development and cell signaling, perturbation of which can result in functional or structural alterations that only become apparent with subsequent stress or age. Surprisingly little is known about how embryos respond to oxidative stress, or the impact of toxicant exposures on pancreatic β-cell development. This project takes a multi-level approach using state-of-the-art techniques to elucidate the complex pathophysiological mechanisms by which exposures to Per-and-polyfluoroalkyl substances (PFAS) that cause oxidative stress derail islet development, and the consequences for β-cell function. We test the central hypothesis that deviations from the GSH redox microenvironment and aberrant activation of the transcription factor Nrf2- at the wrong place and the wrong time- impair β-cell development and function. There are three overarching goals of this project: 1) to deepen our understanding of the role of Nrf2 activation in embryonic β-cells and islet development; 2) ascertain the impact of PFAS on insulin biosynthesis; and 3) identify β-cell fragility and bioindicators of later-life metabolic impacts that can be translated to human health. We will use transgenic zebrafish, confocal microscopy and immunofluorescence, redox proteomics and insulin misfolding assays, and cultured β-cells to investigate exposures to two common PFAS (PFOS, PFHxS), and a legacy aqueous film-forming foam (AFFF). This work will have a sustained and powerful impact on the fields of developmental toxicology, redox biology, and the developmental origins of health and disease and provides critical advances towards developing science-based PFAS guidelines, targets for clinical interventions, and public health policies.

抽象的早期生命阶段暴露于毒物可能会导致胰岛畸形，这可能使人倾向于糖尿病。谷胱甘肽氧化还原微环境在胚胎发育和细胞中起着基本作用信号传导，其扰动可能会导致功能或结构性改变，这只会在随后的压力或年龄。令人惊讶的是，关于胚胎如何应对氧化应激或毒物暴露对胰腺β细胞发育的影响。该项目采用多层次的方法阐明复杂的病理生理机制的最新技术引起氧化应激脱轨胰岛发育的每种氟烷基物质（PFA），并 β细胞功能的后果。我们测试了偏离GSH氧化还原的中心假设转录因子NRF2的微环境和异常激活在错误的位置和错误的位置时间失调的β细胞发育和功能。该项目有三个总体目标：1）加深我们对NRF2激活在胚胎β细胞和胰岛发育中的作用的理解； 2）确定 PFA对胰岛素生物合成的影响； 3）确定后期代谢的β细胞脆弱性和生物指导剂可以转化为人类健康的影响。我们将使用转基因斑马鱼，共焦显微镜和免疫荧光，氧化还原蛋白质组学和胰岛素错误折叠测定和培养的β细胞研究暴露于两个常见的PFA（PFO，PFHXS）和一个传统的水性膜形成泡沫（AFFF）。这项工作将对发育毒理学，氧化还原生物学和健康和疾病的发展起源，并为发展基于科学的发展提供了关键的进步 PFA指南，临床干预目标和公共卫生政策。