Culturing of the uncultured: reverse genomics and multispecies consortia in oral

未培养物的培养：口腔中的反向基因组学和多物种联合体

• 批准号: 8736418
• 负责人: Igor B. Jouline
• 金额: $ 163.77万
• 依托单位: UT-BATTELLE, LLC-OAK RIDGE NATIONAL LAB
• 依托单位国家: 美国
• 财政年份: 2014
• 资助国家: 美国
• 起止时间: 2014-08-01 至 2019-07-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/8736418
• 关键词: Address; Adult; Affect; Antibodies; Bacteria; Bacteroidetes; Biological; Bone Tissue; Cell Separation; Cells; Characteristics; Chemicals; Chloroflexi; Chloroflexus; Clinical; Communication; Communities; Complex; Confocal Microscopy; DNA; Data; Deltaproteobacteria; Dependency; Disease; Disease Association; Drosophila genus; Drosophila melanogaster; Environment; Etiology; Evolution; Flow Cytometry; Fluorescent Dyes; Food Webs; Foundations; Gel; Gene Expression; Genomics; Growth; Health; Human; Human Microbiome; Imagery; Imaging Techniques; In Situ; Individual; Ingestion; Laboratories; Laboratory Study; Lead; Learning; Life; Light; Link; Metabolic; Metabolic Diseases; Metabolism; Metagenomics; Methods; Microbe; Microbial Biofilms; Microbiological Techniques; Microfluidics; Modeling; Monitor; Mouth Diseases; Nature; Oral; Oral cavity; Oral health; Order Spirochaetales; Organism; Outcome; Pathogenicity; Periodontitis; Phylogenetic Analysis; Physiological; Physiology; Population; Recording of previous events; Research; Resolution; Role; Sampling; Signal Transduction; Simulate; Structure; Surface Antigens; System; Systemic disease; Taxon; Techniques; Time; Tooth Loss; Tooth structure; Virulence; Vitamins; base; biological systems; clinically relevant; comparative genomics; design; disorder prevention; functional genomics; in vivo; insight; member; microbial; microbial community; microorganism; novel; optical imaging; oral bacteria; prevent; public health relevance

DESCRIPTION (provided by applicant): The human oral cavity hosts at least 600 microbial species, many of which are uncultivated and whose roles in human health or disease remain unclear. This is especially true in the subgingival crevice where microbial communities interact through complex food webs forming structured metabolic guilds. These communities potentially lead to diseases of the mouth such as periodontitis, which affects approximately one third of the adult population. Recent, open-ended studies utilizing DNA-based methods have shed new light on the complex nature of subgingival microbial community structure. However, without advances in understanding the physiology of potentially key, uncultivated groups, treatment and more importantly, prevention of diseases such as periodontitis will remain difficult. To address this, we propose a hypothesis driven, targeted approach to selectively bring heretofore uncultivated, disease-associated microorganisms (e. g. candidate phyla TM7 and SR1) into study through advanced cell isolation and high-throughput cultivation techniques. We will employ a proven, immunological-based method, which has successfully been shown to capture rare and uncultivated microorganism from natural environments. This method leverages genomic information to synthesize surface antigens expressed by selected organisms thus avoiding a random approach to enrichment/cultivation. Novel isolates will be studied individually but more importantly, in combination with other species potentially serving as metabolite facilitators or syntrophs found in the same niche and health/disease state. Highly controllable microenvironments will be established using microfluidic systems that allow biofilm cultivation in conjunction with real-time, advanced imaging techniques. Model living hosts will also be established in Drosophila to simulate complex interactions in a biological system. These platforms will enable microcultivation of novel oral microbiota needed to establish integrated comparative and functional genomic studies, and will advance our understanding of the intimate interactions between microbes inhabiting the subgingival environment and their role in disease.

描述（由申请人提供）：人类口腔中至少有600种微生物，其中许多是未培养的，其在人类健康或疾病中的作用尚不清楚。尤其是在龈下缝隙中，微生物群落通过复杂的食物网相互作用，形成结构化的代谢团。这些社区可能导致口腔疾病，如牙周炎，影响大约三分之一的成年人口。最近，开放式的研究，利用DNA为基础的方法，揭示了新的光龈下微生物群落结构的复杂性。然而，如果没有在了解潜在的关键，未培养群体的生理学方面取得进展，治疗，更重要的是，预防牙周炎等疾病仍然很困难。为了解决这个问题，我们提出了一种假设驱动的，有针对性的方法，以选择性地将迄今为止未培养的，疾病相关的微生物（例如，G.候选门TM 7和SR 1）通过先进的细胞分离和高通量培养技术进行研究。我们将采用一种经过验证的、基于免疫学的方法，该方法已被成功证明可以从自然环境中捕获稀有和未培养的微生物。该方法利用基因组信息来合成由所选生物体表达的表面抗原，从而避免了富集/培养的随机方法。新分离株将单独研究，但更重要的是，与其他可能作为代谢物促进剂或在相同生态位和健康/疾病状态中发现的互养生物的物种相结合。高度可控的微环境将使用微流体系统建立，该系统允许生物膜培养与实时，先进的成像技术相结合。还将在果蝇中建立模型活体宿主，以模拟生物系统中的复杂相互作用。这些平台将使建立综合比较和功能基因组研究所需的新型口腔微生物群的微培养成为可能，并将促进我们对居住在龈下环境中的微生物之间的密切相互作用及其在疾病中的作用的理解。