Rhodobacter capsulatus PG Lipopolysaccharide Blocks the Effects of a Lipoteichoic Acid, a Toll-Like Receptor 2 Agonist

• Published in: Actanaturae Vol. 14; no. 4; pp. 69 - 74
• Main Authors: Zubova, S V, Kosyakova, N I, Grachev, S V, Prokhorenko, I R
• Format: Journal Article
• Language: English
• Published: Russia (Federation) A.I. Gordeyev 01-10-2022
• Subjects: lipoteichoic acid; Rhodobacter capsulatus; cytokines; CD14; TLR; lipopolysaccharide
• ISSN: 2075-8251
• DOI: 10.32607/actanaturae.11747

Lipopolysaccharides (LPS) and lipoteichoic acids (LTA) are the major inducers of the inflammatory response of blood cells caused by Gram-negative and some Gram-positive bacteria. CD14 is a common receptor for LPS and LTA that transfers the ligands to TLR4 and TLR2, respectively. In this work, we have demonstrated that the non-toxic LPS from Rhodobacter capsulatus PG blocks the synthesis of pro-inflammatory cytokines during the activation of blood cells by Streptococcus pyogenes LTA through binding to the CD14 receptor, resulting in the signal transduction to TLR2/TLR6 being blocked. The LPS from Rhodobacter capsulatus PG can be considered a prototype for developing preparations to protect blood cells against the LTA of gram-positive bacteria.