Analysis of the differentially expressed low molecular weight peptides in human serum via an N-terminal isotope labeling technique combining nano-liquid chromatography/matrix-assisted laser desorption/ionization mass spectrometry

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	Analysis of the differentially expressed low molecular weight peptides in human serum via an N-terminal isotope labeling technique combining nano-liquid chromatography/matrix-assisted laser desorption/ionization mass spectrometry
	Leng JP(冷嘉鹏) ; Zhu D(朱东) ; Wu DJ(武多娇) ; Zhu TY(朱同玉) ; Zhao NW(赵宁伟) ; Guo YL(郭寅龙)
刊名	Rapid Commun. Mass Spectrom.
	2012
卷号	26 期号:21 页码:2555-2562
ISSN号	0951-4198
其他题名	氮端同位素标记技术结合纳流液相/基质辅助激光解析离子化质谱分析人体血清中不同表达的低质量多肽
通讯作者	朱同玉 ; 郭寅龙
英文摘要	RATIONALE Peptidomics analysis of human serum is challenging due to the low abundance of serum peptides and interference from the complex matrix. This study analyzed the differentially expressed (DE) low molecular weight peptides in human serum integrating a DMPITC-based N-terminal isotope labeling technique with nano-liquid chromatography and matrix-assisted laser desorption/ionization mass spectrometry (nano-LC/MALDI-MS). METHODS The workflow introduced a [d6]-4,6-dimethoxypyrimidine-2-isothiocyanate (DMPITC)-labeled mixture of aliquots from test samples as the internal standard. The spiked [d0]-DMPITC-labeled samples were separated by nano-LC then spotted on the MALDI target. Both quantitative and qualitative studies for serum peptides were achieved based on the isotope-labeled peaks. RESULTS The DMPITC labeling technique combined with nano-LC/MALDI-MS not only minimized the errors in peptide quantitation, but also allowed convenient recognition of the labeled peptides due to the 6?Da mass difference. The data showed that the entire research procedure as well as the subsequent data analysis method were effective, reproducible, and sensitive for the analysis of DE serum peptides. CONCLUSIONS This study successfully established a research model for DE serum peptides using DMPITC-based N-terminal isotope labeling and nano-LC/MALDI-MS. Application of the DMPITC-based N-terminal labeling technique is expected to provide a promising tool for the investigation of peptides in vivo, especially for the analysis of DE peptides under different biological conditions. Copyright (C) 2012 John Wiley & Sons, Ltd.
学科主题	分析化学
收录类别	SCI
原文出处	http://dx.doi.org/10.1002/rcm.6369
语种	英语
WOS记录号	WOS:000309182200009
公开日期	2013-08-29
内容类型	期刊论文
源URL	[http://202.127.28.38/handle/331003/28659]
专题	上海有机化学研究所_分析化学研究室
推荐引用方式 GB/T 7714	Leng JP,Zhu D,Wu DJ,et al. Analysis of the differentially expressed low molecular weight peptides in human serum via an N-terminal isotope labeling technique combining nano-liquid chromatography/matrix-assisted laser desorption/ionization mass spectrometry[J]. Rapid Commun. Mass Spectrom.,2012,26(21):2555-2562.
APA	冷嘉鹏,朱东,武多娇,朱同玉,赵宁伟,&郭寅龙.(2012).Analysis of the differentially expressed low molecular weight peptides in human serum via an N-terminal isotope labeling technique combining nano-liquid chromatography/matrix-assisted laser desorption/ionization mass spectrometry.Rapid Commun. Mass Spectrom.,26(21),2555-2562.
MLA	冷嘉鹏,et al."Analysis of the differentially expressed low molecular weight peptides in human serum via an N-terminal isotope labeling technique combining nano-liquid chromatography/matrix-assisted laser desorption/ionization mass spectrometry".Rapid Commun. Mass Spectrom. 26.21(2012):2555-2562.