Endotoxic activities of lipopolysaccharide (LPS) isolated from Burkholderia (Pseudomonas) pseudomallei, a causative agent of melioidosis, were investigated. Compared to an enterobacterial LPS (SAE-LPS), B. pseudomallei LPS (BP-LPS) exhibited weaker pyrogenic activity in rabbits, lethal toxicity in galactosamine-sensitized mice and murine macrophage activation, i.e. production of tumor necrosis factor, interleukin-6 and nitric oxide. BP-LPS, on the other hand, exhibited stronger mitogenic activity to murine splenocytes than SAE-LPS; moreover, it stimulated even the splenocytes of LPS-resistant C3H/HeJ mice. Unusual chemical structures in the acid-stable inner core region attached to the lipid A moiety of BP-LPS may be responsible for this strong mitogenic activity.
Matsuura, M., Kawahara, K., Ezaki, T., & Nakano, M. (1996). Biological activities of lipopolysaccharide of Burkholderia (Pseudomonas) pseudomallei. FEMS Microbiology Letters, 137(1), 79–83. https://doi.org/10.1016/0378-1097(96)00037-7