Higher oxLDL levels were associated with a significantly increased risk of obesity at follow-up (OR = 1

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Higher oxLDL levels were associated with a significantly increased risk of obesity at follow-up (OR = 1.2, 95% CI: 1.1 1.4, p = 0.003), higher BMI ( = 0.61 0.15, p < 0.001) and % total body fat ( = 0.88 0.18, p < 0.001) measured at follow-up. baseline, oxLDL was positively associated with T2D (OR=1.3,95% CI:1.11.5), fasting glucose (=0.030.006), HbA1c (=0.020.004), fasting insulin (=0.120.02), HOMA-IR (=0.130.02) and negatively with adiponectin (=0.160.03), (all p<0.001). The strength and magnitude of these associations did not differ much between blacks and whites. In both blacks and whites, oxLDL was also associated with obesity (OR=1.3, 95% CI:1.11.4) and 3 of its related traits (=0.600.14 for BMI, =0.740.17 for % body fat, =0.290.06 for visceral fat; all p<0.001). Furthermore, of 4 traits measured after 7 years of follow-up (fasting glucose, HbA1c, BMI and % fat), their relationship with oxLDL were similar to baseline observations. No significant association was found between oxLDL and incident T2D. Interestingly, oxLDL was significantly associated with % change in T2D- and obesity-related traits in whites but not in blacks. == Conclusion/interpretation == Our data suggest that systemic oxidative stress may be a novel risk factor for T2D and obesity. Keywords:oxLDL, diabetes, oxidation, obesity == INTRODUCTION == There is increasing interest in the role of oxidative stress in common metabolic disorders such as type 2 diabetes (T2D) and obesity in recent years. Some studies have shown that oxidative stress and inflammatory processes play an important role in the development of vascular pathologies [13], T2D [2] and the metabolic syndrome Rabbit Polyclonal to PIK3CG which is characterized by insulin resistance, central obesity, hypertension and dyslipidemia [4]. For instance, the levels of a commonly used marker for oxidative stress, plasma oxidized LDL (oxLDL), were shown to be elevated in individuals with the metabolic syndrome compared to those without [58]. OxLDL level, not LDL-cholesterol, was also found to be predictive of incident T2D [9]. This suggests that the oxidative modification of LDL may be a marker of metabolic changes preceding or accompanying the onset of T2D [9]. Furthermore, oxidative stress is also associated with some risk factors of these clinical diseases. OxLDL has been positively associated with obesity and inflammation [10,11], and among individuals with NT157 elevated abdominal fat, the effect of oxidative stress was even greater on cardiovascular disease (CVD) risk [12,13]. Although NT157 some studies on the relation between oxLDL and T2D have been carried out, the results are neither consistent nor conclusive, due to either the limited sample sizes or the cross-sectional nature of most studies. Very few studies investigated the relation between oxLDL and obesity. Moreover, no study on the relationship between oxLDL, T2D and obesity has been carried out in blacks. The prevalence of T2D and obesity, as well as fat distributions, are known to differ between whites and blacks. Thus the current literature cannot be easily generalized to other populations. The novelty of the current study NT157 is three fold. Firstly, we report on the association between oxLDL, obesity and T2D in blacks. Secondly, we report on a more comprehensive array of traits related to T2D and obesity. We examined six T2D-related traits (T2D status, HbA1c, fasting glucose, insulin, adiponectin and HOMA-IR) and six obesity-related traits (obesity status, BMI, leptin, % body fat, visceral and subcutaneous fat mass), where as in the literature, only glucose, insulin, BMI and waist circumference were investigated, in people with cardiovascular diseases or the metabolic syndrome. Lastly, we also look at the relationship between oxLDL measured at baseline and changes between traits values at baseline and after 7 years of follow-up. In the current study, we aim to investigate whether oxLDL predicts T2D- and obesity related traits. Moreover, we also aim to evaluate if oxLDL measured at baseline is associated with prospective changes in these traits. == MATERIALS AND METHODS == == Study Participants == The Health, Aging, and Body Composition (Health ABC) Study is a prospective cohort study that aims at studying the relation of age-related changes in health and body composition with incident functional limitations in initially well-functioning elderly adults. At baseline, the cohort included 3,075 persons aged 70 to 79 years; 41.6% were Black and 51.6% were female. Participants were recruited from Medicare listing in Pittsburgh, Pennsylvania, and Memphis, Tennessee between April 1997 and June 1998. Eligibility criteria included: 1) reported ability to walk one quarter mile (0.4 km), climb 10 steps, and perform basic activities of daily living without difficulty; 2) absence of life-threatening illness; and 3) intention to remain in the current geographic area for at least 3 years. All participants gave informed written consent; the protocol was approved by the institutional review boards of the.