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Keio University Research: Demystifying the fatty-world of lipids


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Keio University

14 Jul, 2021, 04:25 GMT

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TOKYO, July 14, 2021 /PRNewswire/ -- Researchers at Keio University, Japan, describe cutting edge mass spectrometry technology that offers unprecedented insights into possible links between the functional metabolites produced by gut microorganisms and human health. These findings were published in the journals iScience and STAR Protocols.  

The Keio Research Highlights website offers more details about this and other recent research being conducted by researchers at Keio University.

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Non-targeted lipidomics to address the biological questions © RIKEN

https://research-highlights.keio.ac.jp/

What are lipids?

Lipids are hydrocarbon molecules—such as fats and oils—that form the building blocks of human cell membranes and store energy that is released by a variety of metabolic pathways for use by the body. "The extremely diverse nature of lipids means that it is not only challenging to identify and determine species but also to quantify their roles as signaling molecules in physiology and disease," says Makoto Arita, a professor at the Keio University Faculty of Pharmacy. "My research is focused on gaining insights into the structure and functions of lipids that govern inflammation and tissue homeostasis.1 My approach is based on the analysis of lipids using liquid chromatography tandem mass spectrometry (LC-MS/MS)—an extremely powerful tool for lipidomics research that we have recently been using to elucidate a wide range of functional metabolites produced by gut microorganisms."

Advanced non-targeted lipidomics for gut microorganisms

Professor Arita recently reported on the development of new lipidomics technology to analyze complex lipid metabolites produced by gut microorganisms in collaboration with colleagues at RIKEN, where he is the team leader of the Laboratory for Metabolomics at the RIKEN Center for Integrative Medical Sciences.2,3 "The new lipidomics technology combines non-targeted mass spectrometry to enable unbiased comprehensive analysis with feature-based molecular spectrum networking, which supports structural estimation of unknown molecules," explains Arita.

The research team used mice treated with different combinations of antibiotics to successfully identify 985 lipid structures in feces, of which around 24.8% appeared to be dependent on gut microorganisms as determined by a more than 10-fold decrease in antibiotic-treated mice. They also identified unique lipid structures that are directly related to gut microorganisms, including acyl alpha-hydroxyl fatty acid (AAHFA). Notably, this approach accurately predicted the bacterial species responsible for producing AAHFA and other unique lipid structures.

"We expect this research to lead to unprecedented insights into the complex lipid metabolism networks resulting from the interaction between gut microorganisms and their hosts," says Arita. "Ultimately, this research could potentially lead to the discovery of new functional metabolites involved in host homeostasis and the onset of diseases."

Image link: https://research-highlights.keio.ac.jp/uploads/highlights/2021_07_07.jpg

References

  1. H. Tsugawa et al., A lipidome atlas in MS-DIAL 4, Nat Biotechnol 38, 1159-1163, (2020).
    https://doi.org/10.1038/s41587-020-0531-2
  2. S. Yasuda et al., Elucidation of Gut Microbiota-Associated Lipids Using LC-MS/MS and 16S rRNA Sequence Analyses, iScience, 23, 101841, (2020).
    https://doi.org/10.1016/j.isci.2020.101841
  3. N. Okahashi et al., Global profiling of gut microbiota-associated lipid metabolites in antibiotic-treated mice by LC-MS/MS-based analyses, STAR Protocols, 2, 100492, (2021).
    https://doi.org/10.1016/j.xpro.2021.100492

Links

Makoto Arita information

https://k-ris.keio.ac.jp/html/100012924_en.html

About Keio University

Keio University is a private, comprehensive university with six major campuses in the Greater Tokyo area along with a number of affiliated academic institutions. Keio prides itself on educational and research excellence in a wide range of fields and its state-of-the-art university hospital.

Keio was founded in 1858, and it is Japan's first modern institution of higher learning. Over the last century and a half, it has evolved into and continues to maintain its status as a leading university in Japan through its ongoing commitment to producing leaders of the future. Founder Yukichi Fukuzawa, a highly respected educator and one of the most important intellectuals of modern Japan, aspired for Keio to be a pioneer of new discoveries and contribute to society through.

Further information

Office of Research Development and Sponsored Projects
Keio University
2-15-45 Mita, Minato-ku, Tokyo 108-8345 Japan
E-mail: keio-rpr@adst.keio.ac.jp

Websites
Keio University
https://www.keio.ac.jp/en/

Keio Research Highlights
https://research-highlights.keio.ac.jp/

Photo: https://mma.prnewswire.com/media/1573728/Non_targeted_lipidomics.jpg

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