BACKGROUND Hippocampal damages, which are accompanied by inflammation, are among the main causes of epilepsy acquisition. We previously reported that chronic intracerebroventricular (i.c.v.) injection of lipopolysaccharide (LPS) modulates epileptogenesis in rats. There is a network of gap junction channels in the hippocampus that contribute to epileptogenesis. Gap junction channels are formed b...

Pasteurella multocida is a Gram-negative bacterial pathogen that is the causative agent of a wide range of diseases in many animal species, including humans. A widely used method for differentiation of P. multocida strains involves the Heddleston serotyping scheme. This scheme was developed in the early 1970s and classifies P. multocida strains into 16 somatic or lipopolysaccharide (LPS) serova...

The liver is an important site of host-microbe interaction. Although hepatocytes have been reported to be responsive to lipopolysaccharide (LPS), the global gene expression changes by LPS and mechanism(s) by which LPS stimulates cultured hepatocytes remain uncertain. Cultures of primary mouse hepatocytes were incubated with LPS to assess its effects on the global gene expression, hepatic transc...

Bacterial LPS is a potent proinflammatory molecule. In the lungs, LPS induces alterations in surfactant pool sizes and phospholipid (PL) contents, although direct actions of LPS on the alveolar type II cells (AT II) are not yet clear. For this reason, we studied short- and long-term effects of LPS on basal and agonist-stimulated secretory responses of rat AT II by using Ca(2+) microfluorimetry,...

Porphyromonas gingivalis is a gram-negative bacterium that is associated with periodontitis. It has been hypothesized that destruction of bone and periodontal connective tissue is associated with colonization of the subgingival crevicular space by P. gingivalis, although how these bacteria overcome innate host defenses is largely unknown. To examine the early cellular and molecular events of P....

Bacterial lipopolysaccharide (LPS, endotoxin) is a ubiquitous component of dust and air pollution and is suspected to contribute after inhalation to an activation of eosinophils in bronchial tissues of asthmatic patients, provoking inflammatory and allergic processes. We were therefore interested in the interaction of eosinophil granulocytes with LPS and have examined the activation of and upta...

OBJECTIVES Systemic lupus erythematosus is occasionally accompanied with bacterial infection. Lipopolysaccharide (LPS) from bacteria can accelerate and exacerbate lupus nephritis (LN) in animal models, but some mechanisms underlying the LPS-induced acceleration are still unclear. First, it is not known whether LPS can stimulate mesangial cells (MCs) to secrete the pro-inflammatory cytokine, int...

background: camellia sinensis and zataria multiflora as the potent antioxidants and anti-inflammations are crucial in the management of wound therapy. lipopolysaccharide (lps) was used for the proliferative potential on fibroblast cells and induction of inflammatory mediators. objective: we examined the effects of lps and herbal extracts combination in order to identify their mechanisms of acti...

background: dendritic cells (dcs) are professional antigen presenting cells that have an important role in the initiation of immune response. the use of maturation factors in dendritic cell differentiation provides a promising approach in immunotherapy. objective: in this study, we compared tumor necrosis factor-α, polyribocytidylic acid, lipopolysacharide and cpg oligonucleotides in inducing d...