Limited information exists regarding measurement, reproducibility and interrelationships of non-invasive biomarkers in smokers. We compared exhaled breath condensate (EBC) leukotriene B4 (LTB4) and 8-isoprostane, exhaled nitric oxide, induced sputum, spirometry, plethysmography, impulse oscillometry and methacholine reactivity in 18 smokers and 10 non-smokers. We assessed the relationships betw...

The coexistence of upper airways disease with chronic obstructive pulmonary disease (COPD) is not well documented. The aim of this research was to assess sino-nasal inflammation in COPD by various tools, and look for the impact on quality of life, relation to smoking, disease severity and systemic inflammation. Current and ex-smokers with COPD (n = 42) and healthy never-smokers (n = 21) were in...

BACKGROUND: Antioxidant supplementation with vitamin E had no effect in the prevention of cardiovascular diseases (CVD) in three recent large, randomized clinical trials. In order to reassess critically the role of vitamin E in CVD prevention, it is important to establish whether these results are related to a lack of antioxidant action. METHODS: We examined the in vivo antioxidant effect of vi...

Age-associated declines in protein homeostasis mechanisms ("proteostasis") are thought to contribute to age-related neurodegenerative disorders. The increased oxidative stress which occurs with aging can activate a key proteostatic process, chaperone-mediated autophagy. This study investigated age-related alteration in cerebrospinal fluid (CSF) concentrations of heat shock 70-kDa protein 8 (HSP...

Biomarkers of Lipid Peroxidation? To the Editor: Isoprostanes are currently used as biomarkers of lipid peroxidation in humans.1 Minuz et al2 recently showed that urinary levels of 15-F2t-IsoP were increased in hypertensive patients suffering from renovascular disease, confirming the experimental data showing that renovascular hypertension and activation of the renin-angiotensin system in gener...

The purpose of the study – to association polymorphic variant C-159Tof CD14 gene in patients with irritable bowel syndrome (IBS) depending on thepredominance diarrhea or constipation clinical course and relationshipbetween genotypes (C-159T) some blood parameters.Material methods. involved 90 IBS (30 men 60women aged 22 56 years). CD 14 (C-159T)was analyzed by polymerase chain reaction without ...

Calorie restriction (CR) without malnutrition slows aging in animal models. Oxidative stress reduction was proposed to mediate CR effects. CR effect on urinary F2-isoprostanes, validated oxidative stress markers, was assessed in CALERIE, a two-year randomized controlled trial. Healthy volunteers (n = 218) were randomized to prescribed 25% CR (n = 143) or ad libitum control (AL, n = 75) stratify...

Object—Platelet isoprostane 8-iso-PGF2 , a proaggregating molecule, is believed to derive from nonenzymatic oxidation of arachidonic acid. We hypothesized that NADPH is implicated in isoprostane formation and platelet activation. Methods and Results—We studied 8-iso-PGF2 in platelets from 8 male patients with hereditary deficiency of gp91, the catalytic subunit of NADPH oxidase, and 8 male cont...