Objective(s): The objective of this study was to investigate the hepatoprotective effect of licochalcone B (LCB) in a mice model of carbon tetrachloride (CCl4)-induced liver toxicity. Materials and Methods: Hepatotoxicity was induced in mice by a single subcutaneous injection (SC) of CCl4. The LCB was administered orally once a day for seven days (PO) as pretreatment at three doses of 1, 5, and...

Streptococcus uberis causes a significant proportion of clinical and subclinical intramammary infections (IMI) in lactating and non-lactating dairy cows. In spite of this, its pathogenesis is incompletely understood. A study was conducted to determine leukocyte and cytokine dynamics during experimentally induced S. uberis mastitis. Five Jersey and five Holstein cows were challenged via intramam...

Selectins support the capture and rolling of leukocytes in venules at sites of inflammation and in lymphocyte homing. Gene-targeted mice with null mutations at the L-, E-, or P-selectin locus develop normally and show mild (E-/-) to moderate (P-/-, L-/-) defects in inflammatory cell recruitment. Mice lacking both P- and E-selectin (E/P-/-) have severe neutrophilia and spontaneous skin infection...

The major functional pool of lipoprotein lipase (LPL) that hydrolyzes triglycerides in circulating lipoproteins is located on the vascular endothelium. The macrophage-secreted cytokine tumor necrosis factor (TNF), a molecule known to affect endothelial cell functions, was used to test the hypothesis that alterations of endothelial cell metabolism regulate the binding of LPL to these cells. TNF ...

Objective(s):Gingivitis is an inflammatory disease that affects tooth-supporting tissues and is caused by a microbe-immune response. The aim of this study was to evaluate the effects of omega-3 fatty acids on immune system regulation and the prevention and treatment of gingivitis using an animal model. Materials and Methods: Gingival inflammation was induced by lipopolysaccharide (LPS) injectio...

Objective(s):Acute kidney injury (AKI), a syndrome characterized by decreased glomerular filtration, occurs in every 1 of 5 hospitalized patients.  Renal ischemia-reperfusion, one of the main causes of AKI, is of particular importance in the setting of kidney transplantation. Materials and Methods: Sixty male rats were divided into four groups including control, nephrectomy, sham surgery and re...

Some antibiotics have been shown to modify the host immune response. Infection with Stenotrophomonas maltophilia, is often difficult to treat due to multiresistance to antibiotics. The authors examined the effect of four commonly used antimicrobial agents (ciprofloxacin, ceftazidime, cotrimoxazole and piperacillin-tazobactam) on tumour necrosis factor alpha (TNF alpha) production by human perip...

Tumor necrosis factor alpha (TNF-alpha) not only induces apoptotic signals but also causes antiapoptotic and regenerative responses in the liver. However, the molecular mechanism(s) of the latter events remains unclear. In the present study, we examined TNF-alpha-induced genes in Hc human normal (unsensitized) hepatocytes by cDNA microarray analysis. Interleukin-8 (IL-8) induction was the most ...

Cellular responses to TNF are initiated by either of two cell surface receptors, the type 1 TNF receptor (TNFR1) and the type 2 TNF receptor (TNFR2). Although neither receptor contains an intrinsic protein tyrosine kinase, such activity has been implicated in TNF action. In this study, we show that murine TNF induces the tyrosine phosphorylation and activation of the intracellular Janus tyrosin...