Orbitrap Elite/H-ESI Bundle

描述（由申请人提供）：此资金申请用于Orbitrap Elite/H-ESI质谱仪包，以支持美国国立卫生研究院资助的涉及临床生物标志物开发，疾病预测和分类以及个性化医疗治疗开发的项目。PI与埃默里大学医学部、化学系、生物统计学和生物信息学及环境卫生系的研究人员合作开发了新的分析工作流程，提供了常规和可重复地测量人体血浆和其他生物材料提取物中20 000个高分辨率m/z特征的能力。这些m/z特征中的许多与特定疾病显著相关，但大多数丰度较低，超过一半与人类代谢数据库中的化学物质不匹配。身份验证和鉴定不明化学物质是具有挑战性的，但对主要用户的目标至关重要与NIH资助的基础，转化和临床研究。所要求的仪器将用于应用专门的反褶积MS/MS方法来确认这些项目中重要的、低丰度化学物质的身份，并使用预测的MS/MS谱来表征未识别的化学物质，适用于化学数据库的输入和搜索。医学系（DOM）临床生物标志物实验室与埃默里质谱中心合作，开发了一些策略，使用反褶积质谱/质谱来创建预测的质谱/质谱，以及MSn，以帮助识别存在于复杂混合物（如人类血浆）中的这些重要的低丰度化学物质。所要求的仪器具有积累和解离低丰度离子的能力，并具有足够的质量精度和分辨率来测量产品离子，以深入了解元素组成和结构。该仪器将由DOM临床生物标志物实验室的熟练人员维护和操作，这些人员在高分辨率质谱和计算生物学、生物统计学和生物信息学方面受过专门培训。主要和次要用户将为DOM临床生物标志物实验室的熟练技术人员提供标准服务费用。购买仪器的费用将由DOM临床生物标志物实验室分担，并在该实验室内运行，优先考虑指定的主要用户和一组由NIH资助的次要用户。根据高分辨率代谢组学咨询委员会制定的政策，过剩产能将优先用于NIH资助的其他研究、NIH拨款申请的试点和可行性项目以及其他资助项目。仪器将由DOM临床生物标志物实验室通过服务合同和成本回收系统进行维护，以确保长期运行和维护。

DESCRIPTION (provided by applicant): This funding request is for an Orbitrap Elite/H-ESI Mass Spectrometer Bundle to support NIH-sponsored projects involving clinical biomarker development, disease prediction and classification and therapeutic development for personalized medicine. New analytic workflow developed by the PI in collaboration with investigators in the Departments of Medicine, Chemistry, Biostatistics and Bioinformatics and Environmental Health at Emory University has provided capability to routinely and reproducibly measure >20,000 high- resolution m/z features in extracts of human plasma and other biological materials. Many of these m/z features are significantly associated with specific diseases, but most are of low abundance, and over half do not match chemicals in human metabolic databases. Verification of identities and characterization of unidentified chemicals are challenging yet critical to the goals of major users with NIH grants in basic, translational and clinical research. The requested instrument will be used to apply specialized deconvolution MS/MS methods to confirm identities of significant, low abundance chemicals in these projects, and to characterize unidentified chemicals with predicted MS/MS spectra suitable for chemical database entry and searches. Strategies have been developed within the Department of Medicine (DOM) Clinical Biomarkers Laboratory, in conjunction with the Emory Mass Spectrometry Center, to use deconvolution MS/MS to create predicted MS/MS spectra, and MSn, to aid in identification of these significant, low-abundance chemicals present in complex mixtures such as human plasma. The requested instrument is specifically justified by the capability to accumulate and dissociate low-abundance ions and measure product ions with sufficient mass accuracy and resolution to gain insight into elemental composition and structure. The instrument will be maintained and operated by skilled personnel in the DOM Clinical Biomarkers Laboratory with specific training in high-resolution mass spectrometry and computational biology, biostatistics and bioinformatics. Major and minor users will provide a standard fee for service by skilled technicians within the DOM Clinical Biomarkers Laboratory. The instrument purchase will be cost-shared by the DOM Clinical Biomarkers Laboratory and operated within this laboratory with priority given to the named major users and a group of minor users also supported by NIH grants. Excess capacity will be used with priority given to other NIH-sponsored research, pilot and feasibility projects for NIH grant submissions, and other sponsored projects according to policies established by a High-Resolution Metabolomics Advisory Committee. The instrument will be maintained by the DOM Clinical Biomarkers Laboratory with a service contract and a cost recovery system to assure long-term operation and maintenance.