Innate immunomodulation by lipophilic termini of lipopolysaccharide; synthesis of lipid As from Porphyromonas gingivalis and other bacteria and their immunomodulative responses.

Abstract:

:Synthetic studies of lipid A and LPS partial structures have been performed to investigate the relationship between structures and functions of LPS. Recent studies have suggested several pathological implications of LPS from parasitic bacteria due to its influence on the host immune responses. To address this issue, we established an efficient synthetic strategy that is widely applicable to the synthesis of various lipid As by using a key disaccharide intermediate with selectively cleavable protecting groups. Porphyromonas gingivalis and Helicobacter pylori lipid As were synthesized and their biological activities were evaluated. All synthetic lipid As did not induce strong inflammatory responses: some are very weak cytokine inducers and others are antagonistic in IL-6 and IL-8 induction with E. coli LPS. On the other hand, P. gingivalis lipid As showed potent IL-18 inducing activity. Since IL-18 has been shown to correlate with chronic inflammation, P. gingivalis LPS may be implicated in the chronic inflammatory responses.

journal_name

Mol Biosyst

journal_title

Molecular bioSystems

authors

Fujimoto Y,Shimoyama A,Saeki A,Kitayama N,Kasamatsu C,Tsutsui H,Fukase K

doi

10.1039/c3mb25477a

subject

Has Abstract

pub_date

2013-05-01 00:00:00

pages

987-96

issue

5

eissn

1742-206X

issn

1742-2051

journal_volume

9

pub_type

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