Characterization of Type-2 Cytokine-Producing NK Cells

2 型细胞因子产生 NK 细胞的表征

• 批准号: 7707072
• 负责人: Kerry S Campbell
• 金额: $ 21.7万
• 依托单位: RESEARCH INST OF FOX CHASE CAN CTR
• 依托单位国家: 美国
• 财政年份: 2009
• 资助国家: 美国
• 起止时间: 2009-06-05 至 2011-05-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/7707072
• 关键词: Address; Allergens; Allergic; Asthma; Binding; Biological; Biology; Cataloging; Catalogs; Cell Proliferation; Cell physiology; Cells; Characteristics; Chemotaxis; Clinical; Communicable Diseases; Data; Development; Disease; Equilibrium; Exposure to; Extrinsic asthma; Future; Gastrointestinal tract structure; Gene Expression; Genes; Genetic; Goals; Health; Human; Human Volunteers; Immune; Immune response; Immunosuppression; Individual; Infection; Inflammation; Inflammatory; Inflammatory Response; Interleukin-13; Interleukin-4; Interleukin-5; Intestines; Irrigation; Knowledge; Leukocytes; Location; Lung; Mediating; Modeling; Molecular Target; Mus; Natural Killer Cells; Pathogenesis; Phenotype; Play; Population; Process; Production; Prostaglandin D2; Prostaglandins; Public Health; Recruitment Activity; Regulation; Reporting; Role; Signal Transduction; Site; Surface; Testing; Th2 Cells; Time; Type - attribute; Work; base; cell type; chemokine; cytokine; cytotoxicity; fMet-Leu-Phe receptor; human subject; improved; in vivo; macrophage; mast cell; microbial; mouse model; mucosal site; novel; pathogen; prostaglandin D receptor; public health relevance; receptor; respiratory; response

DESCRIPTION (provided by applicant): Allergic immune responses are biased toward the production of type-2 cytokines. We have identified new surface markers of a small subset of human natural killer (NK) cells that produce the type-2 cytokines, IL-4 and IL-13. In addition, we have shown that these type-2 NK cells are enriched in the lungs of atopic human subjects in response to allergenic challenge. Therefore, our data suggest that these cells may contribute to the inflammatory response at sites of allergenic insult, such as mucosal surfaces of the lung and gastrointestinal tract. Our discovery of better surface markers to delineate these cells allows us to better purify them and define their functions. In this application, we propose exploratory studies to significantly improve our understanding of the biology of type-2 NK cells. Specifically, we will 1) catalog receptors on the human type-2 NK cells and test their impacts on biological responses, and 2) use our knowledge in humans to characterize the type-2 NK cells in mice and test whether they can also respond to allergenic challenge in a mouse model of asthma. The findings will fill significant gaps in our understanding of environmental signals that regulate the functions of type-2 NK cells, and establish a mouse model for studying their in vivo functions. Improved understanding of these biological parameters will allow us to establish the roles of type-2 NK cells in the pathogenesis of localized allergic responses and infections, particularly in the respiratory and intestinal tracts. Future studies, based upon our findings, will be able to identify molecular targets to manipulate the functions of type-2 NK cells to improve human health. PUBLIC HEALTH RELEVANCE: to Public Health Natural killer (NK) cells are normal white blood cells that can stimulate innate immune responses. We have recently discovered surface markers to define a small subset of NK cells that can enter the lungs of human volunteers after exposure to an allergen. These cells are unique, since they can produce soluble factors that may contribute to allergic inflammation, and therefore, we will further study these cells in humans and mice to establishing their role in human health and disease.

描述（由申请人提供）：过敏免疫反应偏向于2型细胞因子的产生。我们已经确定了产生2型细胞因子IL-4和IL-13的一小部分人天然杀伤（NK）细胞的新表面标记。此外，我们已经表明，这些类型2 NK细胞富含特应性人体受试者的肺，以应对过敏性挑战。因此，我们的数据表明，这些细胞可能会导致过敏反应部位的炎症反应，例如肺部和胃肠道的粘膜表面。我们发现更好的表面标记来描绘这些细胞，使我们能够更好地净化它们并定义它们的功能。在此应用中，我们提出了探索性研究，以显着提高我们对2型NK细胞生物学的理解。具体而言，我们将1）人类类型-2 NK细胞上的分类受体并测试其对生物学反应的影响，2）使用人类的知识来表征小鼠中的2型NK细胞，并测试它们是否也可以在哮喘小鼠模型中对过敏性挑战做出反应。这些发现将填补我们对调节2型NK细胞功能的环境信号的理解，并建立小鼠模型来研究其体内功能。对这些生物学参数的了解的提高将使我们能够确定2型NK细胞在局部过敏反应和感染的发病机理中的作用，尤其是在呼吸道和肠道中。根据我们的发现，未来的研究将能够识别分子靶标，以操纵2型NK细胞的功能以改善人类健康。公共卫生相关性：对于公共卫生自然杀手（NK）细胞是正常的白细胞，可以刺激先天免疫反应。我们最近发现了表面标记，以定义一小部分NK细胞，这些NK细胞可以在暴露于过敏原后进入人类志愿者的肺部。这些细胞是独一无二的，因为它们可以产生可能导致过敏性炎症的可溶因子，因此，我们将进一步研究人类和小鼠中的这些细胞以确立它们在人类健康和疾病中的作用。