Chemical structure and immunobiological activity of lipid A from Prevotella intermedia ATCC 25611 lipopolysaccharide

FEBS Letters

Asai, Yasuyuki¹  Tamai, Riyoko¹  Umatani, Katsumi¹  Hashimoto, Masahito¹  Jinno, Takayoshi¹  Ogawa, Tomohiko¹ 

[1] Department of Oral Microbiology, Asahi University School of Dentistry, 1851-1 Hozumi, Mizuho, Gifu 501-0296, Japan

关键词: Lipid A;    Branched fatty acid;    Toll-like receptor 4;    Prevotella intermedia;    GlcN;    glucosamine;    IL;    interleukin;    LPS;    lipopolysaccharide;    MALDI-TOF;    matrix-assisted laser desorption/ionization time-of-flight;    MS;    mass spectrometry;    MS/MS;    tandem mass spectrometry;    NMR;    nuclear magnetic resonance;    TLR;    Toll-like receptor;   

DOI  :  10.1016/S0014-5793(03)00414-9

学科分类：生物化学/生物物理

来源: John Wiley & Sons Ltd.

【 摘 要 】

The novel chemical structure and immunobiological activities of Prevotella intermedia ATCC 25611 lipid A were investigated. A lipopolysaccharide (LPS) preparation of P. intermedia was extracted using a phenol–chloroform–petroleum ether method, after which its purified lipid A was prepared by weak acid hydrolysis followed by chromatographic separations. The lipid A structure was determined by mass spectrometry and nuclear magnetic resonance to be a diglucosamine backbone with a phosphate at the 4-position of the non-reducing side sugar, as well as five fatty acids containing branched long chains. It was similar to that of Bacteroides fragilis and Porphyromonas gingivalis, except for the phosphorylation site. P. intermedia lipid A induced weaker cytokine production and NF-κB activation in murine cells via Toll-like receptor (TLR) 4 as compared to Escherichia coli synthetic lipid A (compound 506). Our results indicate that P. intermedia lipid A activates cells through a TLR4-dependent pathway similar to E. coli-type lipid A, even though these have structural differences.

【 授权许可】

Unknown