共查询到10条相似文献,搜索用时 93 毫秒
1.
Oliver Fiehn Lloyd W. Sumner Seung Y. Rhee Jane Ward Julie Dickerson Bernd Markus Lange Geoff Lane Ute Roessner Robert Last Basil Nikolau 《Metabolomics : Official journal of the Metabolomic Society》2007,3(3):195-201
Plant metabolomics has matured over the past 8 years. Plant biologists routinely use comprehensive analyses of plant metabolites
to discover new responses to genetic or environmental perturbation, or to validate initial hypotheses on the function and
in vivo action of gene products. The wealth of scientific findings has increasingly provoked interest to share and review
raw or processed data from plant metabolomics reports. We here suggest a minimum of parameters to be reported in order to
define details of experimental study designs in plant metabolomics studies. 相似文献
2.
3.
Quincy Teng Wenlin Huang Timothy W. Collette Drew R. Ekman Chalet Tan 《Metabolomics : Official journal of the Metabolomic Society》2009,5(2):199-208
A crucial step in metabolomic analysis of cellular extracts is the cell quenching process. The conventional method first uses
trypsin to detach cells from their growth surface. This inevitably changes the profile of cellular metabolites since the detachment
of cells from the extracellular matrix alters their physiology. This conventional method also includes time consuming wash/centrifuge
steps after trypsinization, but prior to quenching cell activity. During this time, a considerable portion of intracellular
metabolites are lost, rendering the conventional method less than ideal for application to metabolomics. We report here a
novel sample preparation method for metabolomics applications using adherent mammalian cells, which eliminates the time consumption
and physiological stress of the trypsinization and wash/centrifuge steps. This new method was evaluated in the study of metabolic
changes caused by 17α-ethynylestradiol (EE2) in estrogen receptor (ER)-positive MCF-7 and ER-negative MDA-MB-231 human breast
cancer cell lines using NMR spectroscopy. The results demonstrated that our direct cell quenching method is rapid, effective,
and exhibits greater metabolite retention, providing an increase of approximately a factor of 50 compared to the conventional
method. 相似文献
4.
代谢物组学及其在微生物研究中的应用 总被引:1,自引:0,他引:1
代谢物组学(metabolomics)是继基因组学(genomics)、蛋白质组学(proteomics)后发展起来的一门新学科。对代谢物组学的含义,研究方法及流程,特别是其在微生物中的应用进行了介绍,包括使用代谢物组学中的NMR技术研究微生物在降解环境污染物中的作用;使用代谢物组学技术研究微生物代谢通量,从而在分析代谢通量的基础上通过代谢工程改变代谢通量,提高目的产物的得率;确定所获得基因库中沉默基因的功能;运用代谢物组学分析方法阐明生物体系对于环境变化的响应,从而协助我们确定最佳的取样时间及最佳分析组织,设计实验。随后简要对代谢物组学发展动态进行了展望。 相似文献
5.
6.
This work reports the implementation and optimization of a method for high-throughput analysis of metabolites produced by the breakdown of natural polysaccharides by microorganisms. Our simple protocol enables simultaneous separation and quantification of more than 40 different sugars and sugar derivatives, in addition to several organic acids in complex media, using 50-mul samples and a standard gas chromatography-mass spectrometry platform that was fully optimized for this purpose. As an implementation proof-of-concept, we assayed extracellular metabolite levels of three bacterial strains cultivated on complex medium rich in polysaccharides and under identical growth conditions. We demonstrate that the metabolic footprinting profile data distinguish among sample types such as typical metabolomics data. Moreover, we demonstrate that the differential metabolite-level data provide insight on specific fibrolytic activity of the different microbial strains and lay the groundwork for integrated proteome-metabolome studies of fiber-degrading microorganisms. 相似文献
7.
Proposed minimum reporting standards for chemical analysis 总被引:4,自引:0,他引:4
Lloyd W. Sumner Alexander Amberg Dave Barrett Michael H. Beale Richard Beger Clare A. Daykin Teresa W.-M. Fan Oliver Fiehn Royston Goodacre Julian L. Griffin Thomas Hankemeier Nigel Hardy James Harnly Richard Higashi Joachim Kopka Andrew N. Lane John C. Lindon Philip Marriott Andrew W. Nicholls Michael D. Reily John J. Thaden Mark R. Viant 《Metabolomics : Official journal of the Metabolomic Society》2007,3(3):211-221
There is a general consensus that supports the need for standardized reporting of metadata or information describing large-scale
metabolomics and other functional genomics data sets. Reporting of standard metadata provides a biological and empirical context
for the data, facilitates experimental replication, and enables the re-interrogation and comparison of data by others. Accordingly,
the Metabolomics Standards Initiative is building a general consensus concerning the minimum reporting standards for metabolomics
experiments of which the Chemical Analysis Working Group (CAWG) is a member of this community effort. This article proposes
the minimum reporting standards related to the chemical analysis aspects of metabolomics experiments including: sample preparation,
experimental analysis, quality control, metabolite identification, and data pre-processing. These minimum standards currently
focus mostly upon mass spectrometry and nuclear magnetic resonance spectroscopy due to the popularity of these techniques
in metabolomics. However, additional input concerning other techniques is welcomed and can be provided via the CAWG on-line
discussion forum at or . Further, community input related to this document can also be provided via this electronic forum.
The contents of this paper do not necessarily reflect any position of the Government or the opinion of the Food and Drug Administration
Sponsor: Metabolomics Society http://www.metabolomicssociety.org/
Reference: http://msi-workgroups.sourceforge.net/bio-metadata/reporting/pbc/
http://msi-workgroups.sourceforge.net/chemical-analysis/
Version: Revision: 5.1
Date: 09 January, 2007 相似文献
8.
《Process Biochemistry》2014,49(1):140-147
The non-protein amino acid ornithine (Orn) plays essential roles in regulation of the urea cycle and polyamines biosynthesis in tobacco. Herein, we show that d-enantiomer of Orn, can actively participate in metabolites production in tobacco cells, functioning a positive role in plant cells metabolism, as opposed to the common l-enantiomer. Using a comprehensive amino acids and amines profiling method by liquid chromatography–electrospray ionization triple quadruple mass spectrometry (LC–ESI-QqQ-MS) in combination with chiral LC–ESI-MS, it was shown that d-Orn has a potential advantage in promoting selective and large accumulation of l-arginine (l-Arg) in tobacco cells. Exogenous d-Orn resulted in a selective up-regulation of l-Arg by 80-fold, while l-Orn slightly increased the levels of all amino acids. Changes of all the urea cycle related intermediates, e.g. citrulline, Arg and Orn were also shown to be critical following change of Orn's stereochemistry. GC/MS profiling of the metabolites revealed that high nicotine production was the dominant change driven by l-Orn treatments. From these observations, d-Orn was shown to be a selective regulator of l-Arg biosynthesis and the urea cycle. We propose that d-Orn has a potential function in the tobacco cells which through some previously unidentified mechanism result in l-Arg accumulation. 相似文献
9.
NMR Spectroscopy has been established as a major tool for identification and quantification of metabolites in a living system. Since the metabolomics era began, one‐dimensional NMR spectroscopy has been intensively employed due to its simplicity and quickness. However, it has suffered from an inevitable overlap of signals, thus leading to inaccuracy in identification and quantification of metabolites. Two‐dimensional (2D) NMR has emerged as a viable alternative because it can offer higher accuracy in a reasonable amount of time. We employed 1H,13C‐HSQC to profile metabolites of six different laboratory E. coli strains. We identified 18 metabolites and observed clustering of six strains according to their metabolites. We compared the metabolites among the strains, and found that a) the strains specialized for protein production were segregated; b) XL1‐Blue separated itself from others by accumulating amino acids such as alanine, aspartate, glutamate, methionine, proline, and lysine; c) the strains specialized for cloning purpose were spread out from one another; and d) the strains originating from B strain were characterized by succinate accumulation. This work shows that 2D‐NMR can be applied to identify a strain from metabolite analysis, offering a possible alternative to genetic analysis to identify E. coli strains. 相似文献
10.