Role of PPAR-delta in the development of zymosan-induced multiple organ failure: an experiment mice study.

Background: Peroxisome proliferator-activated receptor (PPAR)-beta/delta is a nuclear receptor transcription factor that regulates gene expression in many important biological processes. It is expressed ubiquitously, especially white adipose tissue, heart, muscle, intestine, placenta and macrophages but many of its functions are unknown. Saturated and polyunsaturated fatty acids activate PPAR-beta/delta, but physiological ligands have not yet been identified.

Early indicators of chronic lung disease in preterm infants with respiratory distress syndrome and their inhibition by melatonin.

Improved survival from advances in neonatal care has resulted in an increased number of infants at risk for chronic lung disease (CLD). Recently, it was reported that inflammatory mediators such as interleukin (IL)-1beta, IL-6, tumor necrosis factor (TNF)-alpha and IL-8 are present in higher concentrations in lung lavage from babies who develop CLD. Previously, we found that melatonin reduced the rises in proinflammatory cytokines (IL-6, IL-8 and TNF-alpha) and nitrite/nitrate levels in the serum of preterm newborns with respiratory distress syndrome (RDS).

Rosiglitazone, a ligand of the peroxisome proliferator-activated receptor-gamma, reduces the development of nonseptic shock induced by zymosan in mice.

Objective: Peroxisome proliferator-activated receptors (PPARs) are members of the nuclear hormone receptor superfamily of ligand-activated transcription factors that are related to retinoid, steroid, and thyroid hormone receptors. The PPAR-gamma receptor subtype appears to play a pivotal role in the regulation of cellular proliferation and inflammation. Rosiglitazone (Avandia) is a PPAR-gamma agonist (the most potent PPAR-gamma agonist of the thiazolidinedione antidiabetics).

Protective effects of M40401, a selective superoxide dismutase mimetic, on zymosan-induced nonseptic shock.

Objective: Zymosan enhances formation of reactive oxygen species, which contributes to the pathophysiology of organ failure during nonseptic shock. Here we have investigated the effects of M40401, a new superoxide dismutase mimetic, on the organ failure associated with nonseptic shock caused by zymosan in rats.

Design: Experimental study.

Pyrrolidine dithiocarbamate attenuates the development of organ failure induced by zymosan in mice.

Objective: Nuclear factor (NF) kappaB is a transcription factor which plays a pivotal role in the induction of genes involved in physiological processes as well as in the response to injury and inflammation. Dithiocarbamates are anti-oxidants which are potent inhibitors of NF-kappaB. We postulated that pyrrolidine dithiocarbamate (PDTC) would attenuate multiple-organ failure (MOF).

Bispectral Index in ICU: correlation with Ramsay Score on assessment of sedation level.

Objective: The assessment of sedation level in critically ill patient remains a challenge for the intensivists in order to avoid over- or under-sedation phenomena. Scoring systems commonly used still show some limitation; the introduction of Bispectral Index (an EEG parameter) could bring potential advantages in monitoring sedation. According to the reports, Bispectral Index correlates with levels of sedation on the Ramsay Scale.