New monitoring approach for metabolic dynamics in microbial ecosystems using stable-isotope-labeling technologies

Yasuhiro Date, Yumiko Nakanishi, Shinji Fukuda, Tamotsu Kato, Satoshi Tsuneda, Hiroshi Ohno, Jun Kikuchi

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

We have developed a new approach for monitoring the metabolic dynamics in microbial ecosystems using a combination of DNA fingerprinting and metabolome analysis based on stable-isotope-labeling technologies. Stable-isotope probing of DNA (DNA-SIP) has been used previously for the evaluation of cross-feeding in microbial communities. For the development and validation of our monitoring approach, fecal microbiota were analyzed with stable-isotope-labeled glucose used as the sole carbon source. In order to link the metabolic information and the microbial variability, we performed metabolic-microbial correlation analysis based on nuclear magnetic resonance (NMR) profiles and denaturing gradient gel electrophoresis (DGGE) fingerprints, which successfully identified the glucose-utilizing bacteria and their related extracellular metabolites. Moreover, our approach revealed information regarding the carbon flux, in that the "first" wave of extracellular metabolites secreted by the glucose-utilizing bacteria were incorporated into the "secondary" group of substrate-utilizing bacteria, and that this "secondary" group further produced their own secondary metabolized substrates. Thus, this approach is a powerful tool for monitoring the metabolic dynamics in microbial ecosystems and allows for the tracking of the carbon flux within a microbial community.

Original languageEnglish
Pages (from-to)87-93
Number of pages7
JournalJournal of Bioscience and Bioengineering
Volume110
Issue number1
DOIs
Publication statusPublished - 2010 Jul 1

Keywords

  • Carbon flux
  • Denaturing gradient gel electrophoresis (DGGE)
  • Metabolic dynamics
  • Nuclear magnetic resonance (NMR)
  • Stable-isotope probing (SIP)

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

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