Discovery of Lipids from B. longum subsp. infantis using Whole Cell MALDI Analysis

Bifidobacteria are dominant members of the microbial community in the intestinal tract of infants, and studies have shown that glycolipids extracted from the cell surface of these bacteria elicit beneficial immune responses. Accordingly, the identification and structural characterization of glycolip...

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Bibliographic Details
Published in:Journal of organic chemistry 2014-08, Vol.79 (16), p.7332-7341
Main Authors: Timmer, Mattie S. M, Sauvageau, Janelle, Foster, Amy J, Ryan, Jason, Lagutin, Kirill, Shaw, Odette, Harper, Jacquie L, Sims, Ian M, Stocker, Bridget L
Format: Article
Language:English
Subjects:
Bacterial Adhesion - immunology
Bifidobacterium - chemistry
Bifidobacterium - immunology
Bifidobacterium - metabolism
Glycolipids - chemistry
Glycolipids - metabolism
Humans
Intestines - chemistry
Intestines - immunology
Intestines - microbiology
Lipids - chemistry
Lipids - immunology
Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization
Sulfalene - chemistry
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Summary:Bifidobacteria are dominant members of the microbial community in the intestinal tract of infants, and studies have shown that glycolipids extracted from the cell surface of these bacteria elicit beneficial immune responses. Accordingly, the identification and structural characterization of glycolipids from the cell wall of bifidobacteria is the first step in correlating glycolipid structure with biological activity. Using whole cell MALDI as a screening tool, we herein present for the first time the identification and structural elucidation of the major polar lipids from Bifidobacterium longum subs. infantis. The lipids identified include an unprecedented plasmenyl cyclophosphatidic acid and a mixed acetal glycolipid, with the latter subsequently being isolated and found to suppress the innate immune response.
ISSN:0022-3263
1520-6904
DOI:10.1021/jo501016c