Caloric restriction (CR) has been shown to attenuate age-related oxidative damage and to improve major atherosclerotic risk factors. Paraoxonase 1 (PON1), an enzyme specifically associated with HDL containing apolipoproteins A-I and J, has been reported to prevent the proatherosclerotic effects of oxidized LDL. The aim of this study was to evaluate whether modulation of PON1 activity is part of...

INTRODUCTION Human paraoxonase (PON1) is a calcium-dependent enzyme physically associated with HDL, and it is believed to contribute to the atheroprotective effect of HDL. The aim of the study was to evaluate PON1 status in patients with atherosclerosis obliterans as an effect of ischemia regarding its activity and phenotype distribution. MATERIAL AND METHODS The study group consisted of pati...

The objective was to determine PON1 status as a predictor for organophosphorus insecticide sensitivity in a cohort of Latina mothers and newborns from the Salinas Valley, California, an area with high levels of organophosphorus insecticide use. PON1 status was established for 130 pregnant Latina women and their newborns using a high-throughput two substrate activity/analysis method which plots ...

BACKGROUND The activity of paraoxonase 1 (PON1), an antioxidant enzyme whose polymorphisms have been associated with cancer risk, may be associated with metals exposure. OBJECTIVE To evaluate PON1 activity in relation to cadmium, lead, and mercury levels in healthy, premenopausal women. METHODS Women from upstate New York were followed for ≥ two menstrual cycles. Repeated measures linear mi...

paraoxonase-1 (pon1) is a serum hdl-bound enzyme that hydrolyzes a number of aromatic carboxylic acid esters including lipid peroxides, preventing ldl oxidation. systemic lupus erythematosus (sle) patients are at greater risk of oxidative stress, which is associated with abnormal plasma lipid metabolism. in this study, association of pon-55 polymorphism with serum arylesterase (are) activities,...