Role of extracellular vesicles in assaying and regulating immune dysfunction after burn injury

细胞外囊泡在测定和调节烧伤后免疫功能障碍中的作用

• 批准号: 10607063
• 负责人: Micah LaTrell Willis
• 金额: $ 1.55万
• 依托单位: UNIV OF NORTH CAROLINA CHAPEL HILL
• 依托单位国家: 美国
• 财政年份: 2023
• 资助国家: 美国
• 起止时间: 2023-03-15 至 2023-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/10607063
• 关键词: 3-Dimensional; Acute; Acute-Phase Reaction; Address; Adoptive Transfer; Affect; Anti-Inflammatory Agents; Antigen-Antibody Complex; Award; Bacterial Infections; Biological Assay; Biological Markers; Biological Response Modifiers; Body Surface Area; Bone Marrow; Burn injury; CCL2 gene; Cell Differentiation process; Cell physiology; Cells; Clinical; Coculture Techniques; Compensation; Data; Development; Development Plans; Disease; Ensure; Fellowship; Frequencies; Functional disorder; Generations; Goals; HMGB1 gene; Harvest; Health; Hematopoietic stem cells; Homeostasis; Hour; Human; IL8 gene; Immune; Immune System Diseases; Immune response; Immunologic Markers; In Vitro; Individual; Infection; Inflammatory; Injections; Injury; Interleukin-1 beta; Interleukin-10; Interleukin-6; Laboratories; Length of Stay; Lipids; Macrophage; Membrane; MicroRNAs; Molecular; Multiple Organ Failure; Mus; Myeloid Cells; Myeloid-derived suppressor cells; National Institute of General Medical Sciences; National Research Service Awards; Nature; North Carolina; Nucleic Acids; Organ; Organ failure; Outcome; Pathology; Patient-Focused Outcomes; Patients; Pattern; Peripheral; Phagocytosis; Phase; Phenotype; Plasma; Play; Pneumonia; Pre-Clinical Model; Predisposition; Production; Proteins; Proteomics; Publishing; Reporting; Research; Role; Sampling; Sepsis; Severities; Source; Structure; T cell response; T-Lymphocyte; Tail; Testing; Time; Tissues; Training; Trauma; Traumatic injury; Universities; Veins; career; career development; cell type; cytokine; empowerment; exposed human population; extracellular vesicles; functional outcomes; graduate student; hematopoietic stem cell differentiation; immune function; immunoregulation; immunosuppressed; mortality; nanoparticle; neutrophil; novel; pre-doctoral; repository; response; severe burns; stem cells; third degree burn; vesicular release

ABSTRACT The research and training plan put forth in this NRSA Individual Predoctoral Fellowships to Promote Diversity in Health-Related Research (F31) Award will support our pre-doctoral candidate Micah LaTrell Willis, a current third year graduate student at the University of North Carolina at Chapel Hill. We received a Diversity Supplement for a NIGMS R01 Award (R01GM131124) which enabled Mr Willis to receive continued support, and he has performed excellently. This Research Plan and the Training Plan submitted will provide Mr. Willis with opportunities to not only build an intellectual and technical toolbox to propel him towards the next phase of his trainee/development but provide him the career development opportunities to ensure he obtains his short and long-term career goals. Thus, support from this this F31 will empower Mr. Willis to own and drive his research, training, and career development plans. Burn injury is one of the most devastating forms of trauma, with high mortality rates up to 12% due to complications such as organ failure, pneumonia, and infections of other organs. Burn injury results in biphasic systemic immune dysfunction. First, an early (0-72 hours) hyper-inflammatory state, with increased release of immunostimulatory Damage Associated Molecular Patterns (DAMPs) and pro-inflammatory cytokines which can lead to barrier dysfunction and multiple organ failure. Following this is an immunosuppressive phase (weeks / months after injury) associated with widespread increased susceptibility to infection. This immunosuppressed phase is associated with anti-inflammatory cytokines and increased frequency of peripheral myeloid-derived suppressive cells (MDSC) from the bone marrow, which have been shown to play key immunoregulatory roles after traumatic injury by suppressing T cell responses and regulating cytokine production. There is a critical need to characterize this cell type further in burn injury and define the mechanism of their generation after burn injury. Extracellular vesicles have emerged as novel mediators of immune dysfunction across several immune pathologies. Extracellular vesicles (EV) carry DAMPs, cytokines, and miRNAs, to regulate functions of recipient cells. We have found that EVs are a key reservoir for DAMPs, cytokines, and potent immune complexes after burn injury in humans and mice. Given our findings, and the key role of EVs in multiple immune conditions, we hypothesize that EVs drive the immune dysfunction associated with poor clinical outcomes in severe burn injury. Using same patient and mouse tissue (utilizing our established pre-clinical model of burn injury, and repository of collected human burn patient samples) that we have collected we aim to further characterize the payload, to determine their use as biomarkers of immune dysfunction, and immune function (Aim 1) and effect of cellular homeostasis (Aim 2) of EVs isolated from plasma after injury.

抽象的 NRSA个体的个人奖学金中提出的研究和培训计划，以促进多样性 与健康有关的研究（F31）奖将支持我们的博士前候选人米卡·拉特雷尔·威利斯（Micah Latrell Willis），目前是第三 北卡罗来纳大学教堂山分校的一年研究生。我们收到了多元化补充 NIGMS R01奖（R01GM131124），使威利斯先生获得了持续的支持，他有 表现出色。该研究计划和提交的培训计划将为威利斯先生提供 不仅有机会建立一个智力和技术工具箱，以推动他进入下一阶段 实习生/发展，但为他提供了职业发展的机会，以确保他获得短暂的 长期职业目标。因此，此F31的支持将使威利斯先生能够拥有并推动他的研究， 培训和职业发展计划。 烧伤是最毁灭性的创伤形式之一，高死亡率高达12％ 器官衰竭，肺炎和其他器官感染等并发症。烧伤受伤导致双相 全身免疫功能障碍。首先，早期（0-72小时）过度炎性状态，释放增加 免疫刺激性损伤相关的分子模式（抑制）和促炎细胞因子可以 导致屏障功能障碍和多器官故障。之后是免疫抑制阶段（周 / 受伤几个月后）与广泛的感染敏感性相关。这种免疫抑制 阶段与抗炎细胞因子和外周髓样衍生的频率增加有关 骨髓的抑制细胞（MDSC），已显示出扮演关键免疫调节作用 创伤性损伤后，通过抑制T细胞反应并调节细胞因子的产生。有急需 在烧伤损伤中进一步表征这种细胞类型，并定义烧伤后产生的机制。 细胞外囊泡已成为几种免疫功能障碍的新型免疫功能障碍的介体 病理。细胞外囊泡（EV）携带湿，细胞因子和miRNA，以调节受体的功能 细胞。我们发现，电动汽车是潮湿，细胞因子和有效的免疫复合物的关键储存剂 人类和小鼠烧伤受伤。鉴于我们的发现以及电动汽车在多种免疫条件中的关键作用，我们 假设EV驱动与严重烧伤中临床不良结果相关的免疫功能障碍。 使用同一患者和小鼠组织（利用我们已建立的临床前烧伤模型，以及存储库 我们收集的人类燃烧的患者样本）我们旨在进一步表征有效载荷， 确定它们用作免疫功能障碍的生物标志物和免疫功能（AIM 1）和细胞的影响 受伤后从血浆中分离出的电动汽车的稳态（AIM 2）。