Whole blood from 10 healthy volunteers was incubated with 50 pg/ml LPS with or without 13 mu g/ml linezolid (concentrations were chosen to reflect in vivo conditions) for 2 and 4 hours (h). Quantitative real-time PCR was performed from messenger RNA (mRNA) of IL-1 beta, IL-6, IL-8 or TNF-alpha. Cytokine levels in the supernatant were measured by ELISA for IL-6, IL-8 and TNF-alpha. Incubation of human whole blood with LPS increased mRNA levels of cytokines several LY411575 molecular weight thousand fold compared with baseline. The addition of linezolid significantly

reduced mRNA levels of IL-1-beta, IL-6, IL-8 and TNF-alpha (p < 0.05) after 2 and 4 h. LPS stimulation also increased levels of IL-6, IL-8 and TNF-a between 100 and 1000-fold. However, in contrast to mRNA – except for IL-6 – no significant reduction at protein level was observed. These results indicate that immunosuppressive effects of linezolid on mRNA transcription

are only partially reflected by cytokine release.”
“The strongest known circular polarization of biotic origin is the left-circularly polarized (LCP) light reflected from the metallic shiny exocuticle of certain beetles of the family Scarabaeidae. This phenomenon has been discovered by Michelson in 1911. Although since 1955 it has been known NVP-LDE225 ic50 that the human eye perceives a visual illusion when stimulated by circularly polarized (CP) light, it was discovered only recently that a stomatopod shrimp is able to perceive circular polarization. selleckchem It is pertinent to suppose that scarab beetles reflecting LCP light in an optical environment (vegetation) being deficient in CP signals may also perceive circular

polarization and use it to find each other (mate/conspecifics) as until now it has been believed. We tested this hypothesis in six choice experiments with several hundred individuals of four scarab species: Anomala dubia, Anomala vitis (Coleoptera, Scarabaeidae, Rutelinae), and Cetonia aurata, Potosia cuprea (Coleoptera, Scarabaeidae, Cetoniinae), all possessing left-circularly polarizing exocuticle. From the results of our experiments we conclude that the studied four scarab species are not attracted to CP light when feeding or looking for mate or conspecifics. We demonstrated that the light reflected by host plants of the investigated scarabs is circularly unpolarized. Our results finally solve a puzzle raised over one hundred years ago, when Michaelson discovered that scarab beetles reflect circularly polarized light. (C) 2011 Elsevier Inc. All rights reserved.”
“Staphylococcal enterotoxins are major causing agents of food-borne diseases. Their detection in food remnants for risk assessment or food poisoning outbreaks investigation suffers from a lack in comprehensive immunological tools.