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Refinement of a Methodology for Untargeted Detection of Serum Albumin Adducts in Human Populations
Chemical Research in Toxicology ( IF 3.7 ) Pub Date : 2017-11-17 00:00:00 , DOI: 10.1021/acs.chemrestox.7b00186
George W. Preston 1 , Michelle Plusquin 2, 3 , Osman Sozeri 1 , Karin van Veldhoven 2 , Lilian Bastian 1 , Tim S. Nawrot 3, 4 , Marc Chadeau-Hyam 2 , David H. Phillips 1
Affiliation  

Covalently modified blood proteins (e.g., serum albumin adducts) are increasingly being viewed as potential biomarkers via which the environmental causes of human diseases may be understood. The notion that some (perhaps many) modifications have yet to be discovered has led to the development of untargeted adductomics methods, which attempt to capture entire populations of adducts. One such method is fixed-step selected reaction monitoring (FS-SRM), which analyses distributions of serum albumin adducts via shifts in the mass of a tryptic peptide [Li et al. (2011) Mol. Cell. Proteomics 10, M110.004606]. Working on the basis that FS-SRM might be able to detect biological variation due to environmental factors, we aimed to scale the methodology for use in an epidemiological setting. Development of sample preparation methods led to a batch workflow with increased throughput and provision for quality control. Challenges posed by technical and biological variation were addressed in the processing and interpretation of the data. A pilot study of 20 smokers and 20 never-smokers provided evidence of an effect of smoking on levels of putative serum albumin adducts. Differences between smokers and never-smokers were most apparent in putative adducts with net gains in mass between 105 and 114 Da (relative to unmodified albumin). The findings suggest that our implementation of FS-SRM could be useful for studying other environmental factors with relevance to human health.

中文翻译:

在人群中无针对性地检测血清白蛋白加合物的方法学的完善

共价修饰的血液蛋白(例如血清白蛋白加合物)越来越被视为潜在的生物标记,通过它可以了解人类疾病的环境原因。被发现的概念,一些(也许很多)的修改还没有导致的非目标发展adductomics方法,它试图捕捉加合物的全部人口。一种这样的方法是固定步骤选择反应监测(FS-SRM),它通过胰蛋白酶解肽质量的变化来分析血清白蛋白加合物的分布[Li et al。(2011)Mol。细胞。蛋白质组学10,M110.004606]。在FS-SRM可能能够检测到由于环境因素引起的生物学变异的基础上,我们旨在扩展用于流行病学环境的方法。样品制备方法的发展导致了批处理工作流的通量增加,并提供了质量控制。在数据的处理和解释中解决了技术和生物变化带来的挑战。一项针对20名吸烟者和20名从未吸烟者的试点研究提供了吸烟对假定的血清白蛋白加合物水平影响的证据。吸烟者和从未吸烟者之间的差异最明显的是推定的加合物,其净增重在105和114 Da之间(相对于未修饰的白蛋白)。
更新日期:2017-11-19
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