Modulation of the Intestinal Immune Response in Necrotizing Enterocolitis
坏死性小肠结肠炎肠道免疫反应的调节
基本信息
- 批准号:10001502
- 负责人:
- 金额:$ 35.44万
- 依托单位:
- 依托单位国家:美国
- 项目类别:
- 财政年份:2018
- 资助国家:美国
- 起止时间:2018-09-01 至 2023-08-31
- 项目状态:已结题
- 来源:
- 关键词:AdultAnti-Inflammatory AgentsAttenuatedBiological ModelsBiologyBreast FeedingCD4 Positive T LymphocytesCause of DeathCell Culture TechniquesCell Differentiation processCell physiologyCellsConfocal MicroscopyCytometryDataDefectDerivation procedureDevelopmentDevicesDiseaseEngineeringEpithelialEpithelial CellsEpitheliumEvolutionExcisionGastrointestinal DiseasesGenesGoalsGoblet CellsHost DefenseImmuneImmune responseImmune systemImmunologyIn VitroInfantInflammationInflammatoryInflammatory ResponseInterleukin ReceptorInterleukin-17IntestinesIschemic Bowel DiseaseKnowledgeLaboratoriesLamina PropriaLymphocyteLymphocytic InfiltrateMediatingMicrofluidicsModelingMorbidity - disease rateMucous MembraneMusNecrosisNecrotizing EnterocolitisNeonatalOperative Surgical ProceduresPathogenesisPathogenicityPathologicPathway interactionsPhenotypePlayPredispositionPremature BirthPremature InfantPremature Infant DiseasesPreventionPrevention strategyRecombinant InterleukinsRegulationResearchResolutionRiskRoleSecretory CellSeveritiesSignal PathwaySignal TransductionSmall IntestinesStem Cell DevelopmentSupportive careSurvivorsTestingTherapeuticantimicrobialbasecell regenerationcytokinedesigndysbiosisgraft vs host diseasegut microbiotahigh riskhigh risk infanthuman modelin vitro Modelin vivoinflammatory disease of the intestineinnovationinterleukin-22intestinal epitheliumintestinal injuryintravital microscopymortalitymouse modelmultidisciplinarynext generation sequencingnovelnovel therapeuticspreventprotective effectreceptorresistinresponsestem cell differentiationstem cellstherapeutic targetwound healing
项目摘要
Project Summary/Abstract
Necrotizing enterocolitis (NEC) is the leading cause of death from gastrointestinal disease in premature infants
and is characterized by an uncontrolled inflammatory response. The lack of understanding of the mechanisms
that regulate the vicious inflammatory cascade, the inability to determine which infants are susceptible to NEC
and a lack of therapeutic targets all contribute to the persistently high mortality rate. The goals of the
proposed research are to determine the mechanisms that regulate the pathologic immune response
during NEC and use this knowledge to design novel epithelial-or immune-specific strategies for this
devastating disease. Our laboratory has recently discovered that the interleukin-22 (IL-22) signaling pathway
plays a critical role in attenuating the inflammatory response during NEC, as mice lacking the receptor for IL-22
(IL-22Ra1) on the intestinal epithelium demonstrate accelerated mortality in a neonatal mouse model of NEC-
like intestinal injury. We demonstrate that mice subjected to experimental NEC develop gross evidence of
small intestinal ischemia and necrosis, that can be completely rescued in mice with intact IL-22 signaling by
administering recombinant IL-22. In seeking to determine the mechanisms mediating this protection, we have
demonstrated that treatment with recombinant IL-22 decreases the pro-inflammatory Th17 lymphocytic
infiltrate, which we have shown contributes to NEC pathogenesis. Furthermore, we also determined that IL-22
signaling is important in the regulation of intestinal stem cell differentiation, as mice deficient in IL-22Ra1 in the
intestine demonstrate an abnormally profound phenotype characterized by decreased numbers of secretory
cells in the intestine as well as decreased expression of critical genes involved in intestinal stem cell
development and host defense. Based on these findings, we hypothesize that IL-22 signaling through the
receptor IL-22Ra1 attenuates NEC by 1) enhancing intestinal stem cell function, 2) increasing goblet cell
differentiation and 3) shifting the immune cell repertoire towards an anti-inflammatory phenotype. We will
complete our aims of this project by bringing together a multi-disciplinary team with expertise in epithelial
biology, mucosal immunology, mass cytometry, next-generation sequencing, high-resolution confocal and
intravital microscopy as well as microfluidics and engineering for the derivation of in vitro models of human
intestinal function using gut-on-a-chip devices. These studies will make a significant conceptual advance in
understanding the signaling pathways involved in attenuating NEC, explaining the unique susceptibility of the
premature infant to NEC based on a defect in IL-22 signaling, and we will evaluate a novel therapeutic strategy
for NEC by introducing the anti-inflammatory cytokine IL-22 in the intestinal milieu.
项目总结/摘要
坏死性小肠结肠炎(NEC)是早产儿胃肠道疾病死亡的主要原因
其特征是不受控制的炎症反应。
调节恶性炎症级联反应,无法确定哪些婴儿易患NEC
以及缺乏治疗靶点都是导致死亡率持续高企的原因。
拟议的研究是确定调节病理性免疫反应的机制,
并利用这些知识设计新的上皮细胞或免疫细胞特异性策略,
我们的实验室最近发现,白细胞介素-β 22(IL-β 22)信号通路
在减弱NEC期间的炎症反应方面起着关键作用,因为缺乏IL-122受体的小鼠
(IL-在NEC-E2的新生小鼠模型中,
我们证明,实验性NEC的小鼠产生了明显的证据,
小肠缺血和坏死,在具有完整IL-122信号传导的小鼠中,
在寻求确定介导这种保护作用的机制时,我们
表明用重组IL-122治疗可降低促炎性Th 17淋巴细胞
此外,我们还确定了IL-122在NEC发病中的作用。
信号传导在肠干细胞分化的调节中是重要的,如在肠干细胞分化中缺乏IL-122 Ra 1的小鼠。
肠表现出异常深刻的表型,其特征在于分泌的
肠道干细胞中的关键基因表达减少,
基于这些发现,我们假设IL-122信号通过细胞外基质介导,
受体IL-122 Ra 1通过1)增强肠干细胞功能,2)增加杯状细胞数量,
分化和3)将免疫细胞库转向抗炎表型。
通过汇集一个具有上皮细胞专业知识的多学科团队来完成我们的目标。
生物学、粘膜免疫学、大规模细胞计数、下一代测序、高分辨率共聚焦和
活体显微镜以及微流体和工程学,用于衍生人的体外模型
这些研究将在概念上取得重大进展,
了解参与衰减NEC的信号通路,解释了NEC的独特易感性,
我们将评估一种新的治疗策略,
通过在肠道环境中引入抗炎细胞因子IL-122来治疗NEC。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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MISTY L GOOD其他文献
MISTY L GOOD的其他文献
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{{ truncateString('MISTY L GOOD', 18)}}的其他基金
Neonatal gut-on-a-chip platform for high content drug testing and precision medicine
用于高内涵药物测试和精准医学的新生儿肠道芯片平台
- 批准号:
10594705 - 财政年份:2022
- 资助金额:
$ 35.44万 - 项目类别:
Neonatal gut-on-a-chip platform for high content drug testing and precision medicine
用于高内涵药物测试和精准医学的新生儿肠道芯片平台
- 批准号:
10491072 - 财政年份:2022
- 资助金额:
$ 35.44万 - 项目类别:
Neonatal gut-on-a-chip platform for high content drug testing and precision medicine
用于高内涵药物测试和精准医学的新生儿肠道芯片平台
- 批准号:
10674890 - 财政年份:2022
- 资助金额:
$ 35.44万 - 项目类别:
Non-invasive analysis of methylated cell free DNA in necrotizing enterocolitis
坏死性小肠结肠炎甲基化细胞游离 DNA 的无创分析
- 批准号:
10704229 - 财政年份:2021
- 资助金额:
$ 35.44万 - 项目类别:
Non-invasive analysis of methylated cell free DNA in necrotizing enterocolitis
坏死性小肠结肠炎甲基化细胞游离 DNA 的无创分析
- 批准号:
10577705 - 财政年份:2021
- 资助金额:
$ 35.44万 - 项目类别:
Non-invasive analysis of methylated cell free DNA in necrotizing enterocolitis
坏死性小肠结肠炎甲基化细胞游离 DNA 的无创分析
- 批准号:
10316733 - 财政年份:2021
- 资助金额:
$ 35.44万 - 项目类别:
Modulation of the Intestinal Immune Response in Necrotizing Enterocolitis
坏死性小肠结肠炎肠道免疫反应的调节
- 批准号:
10543597 - 财政年份:2018
- 资助金额:
$ 35.44万 - 项目类别:
Modulation of the Intestinal Immune Response in Necrotizing Enterocolitis
坏死性小肠结肠炎肠道免疫反应的调节
- 批准号:
10468084 - 财政年份:2018
- 资助金额:
$ 35.44万 - 项目类别:
Aryl hydrocarbon receptor signaling in the pathogenesis of necrotizing enterocolitis
坏死性小肠结肠炎发病机制中的芳基烃受体信号传导
- 批准号:
9220912 - 财政年份:2017
- 资助金额:
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Novel Anti-Inflammatory Properties of Breast Milk in Necrotizing Enterocolitis
母乳在坏死性小肠结肠炎中的新型抗炎特性
- 批准号:
8820360 - 财政年份:2014
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