Soccer players under regular training show oxidative stress but an improved plasma antioxidant status

1999 ◽  
Vol 96 (4) ◽  
pp. 381-385 ◽  
Author(s):  
Fernando D. BRITES ◽  
Pablo A. EVELSON ◽  
Marina García CHRISTIANSEN ◽  
María F. NICOL ◽  
María José BASÍLICO ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Physical Activity ◽  
High Density Lipoprotein ◽  
Antioxidant Status ◽  
Density Lipoprotein ◽  
High Density ◽  
Soccer Players ◽  
Plasma Antioxidant Capacity ◽  
Plasma Antioxidant ◽  
Regular Training

Physical activity is known to induce oxidative stress in individuals subjected to intense exercise. In this study, we investigated the lipoprotein profile and the plasma antioxidant status in a group of soccer players engaged in a regular training programme. As was expected for aerobic exercise, high-density lipoprotein-cholesterol (HDL-C) and HDL3-C levels were significantly increased in the sportsmen (P< 0.05). Total plasma antioxidant capacity was 25% higher in sportsmen than in controls (P< 0.005). Accordingly, plasma hydrosoluble antioxidant levels (ascorbic acid and uric acid) were found to be significantly elevated in the soccer players (P< 0.005). In addition, these subjects showed high concentrations of α-tocopherol in plasma compared with controls (P< 0.005). Furthermore, an increase in plasma superoxide dismutase activity was also observed in relation to exercise (P< 0.01). The elevation in plasma activities of antioxidant enzymes and the higher levels of free radical scavengers of low molecular mass may compensate the oxidative stress caused by physical activity. High levels of high-density lipoprotein in plasma may offer additional protection by inhibiting low-density lipoprotein oxidation and thus liposoluble antioxidant consumption. Therefore, soccer players under regular training show an improved plasma antioxidant status in comparison to sedentary controls.

Soccer players under regular training show oxidative stress but an improved plasma antioxidant status

1999 ◽  
Vol 96 (4) ◽  
pp. 381 ◽  
Author(s):  
Fernando D. BRITES ◽  
Pablo A. EVELSON ◽  
Marina Garc~ía CHRISTIANSEN ◽  
Mar~ía F. NICOL ◽  
Mar~ía José BASÍLICO ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Antioxidant Status ◽  
Soccer Players ◽  
Plasma Antioxidant ◽  
Regular Training

scholarly journals Independent and Joint Associations of Sedentary Behavior and Physical Activity with Cardiometabolic Health Markers in the 1970 British Birth Cohort

2019 ◽  
Author(s):  
Bo-Huei Huang ◽  
Mark Hamer ◽  
Sebastien Chastin ◽  
Annemarie Koster ◽  
Natalie Pearson ◽  
...  
Keyword(s):  
Physical Activity ◽  
High Density Lipoprotein ◽  
High Density Lipoprotein Cholesterol ◽  
Sedentary Time ◽  
Glycated Hemoglobin ◽  
Vigorous Physical Activity ◽  
Density Lipoprotein ◽  
High Density ◽  
Breaks In Sedentary Time ◽  
Joint Associations

AbstractObjectiveTo examine the independent and joint associations thigh-worn accelerometry assessed sedentary time and moderate to vigorous physical activity with cardiometabolic health markers.DesignCross-sectional study embedded in the age-46 wave an established birth cohort, the 1970 British Birth Cohort.SettingPopulation-based sample from Great Britain (England, Scotland, and Wales).MethodsOutcome measures included: body mass index, waist-to-hip ratio, blood pressure, glycated hemoglobin, high-density lipoprotein cholesterol, total cholesterol, triglycerides, and c-reactive protein. Sedentary behavior and other physical activity exposures, recorded by a thigh-worn activPAL3 accelerometry, included: daily sedentary time, breaks in sedentary time, daily time spent in moderate-to-vigorous physical activity. Multiple linear regression analyses, multiple logistic regression analyses, and general linear models were conducted as applicable.Results4,634 participants were available for the final analysis. After adjusting for potential confounders and moderate-to-vigorous physical activity, daily sedentary time was positively associated with triglycerides (β=0.052 [0.015, 0.089]) and inversely associated with high-density lipoprotein cholesterol (β=-0.015 [-0.022, -0.010]). Daily prolonged sedentary time (≥ 60 minutes) was positively associated with both glycated hemoglobin and log-transformed c-reactive protein (β=0.240 [0.030, 0.440] and 0.026 [0.007, 0.045], respectively) and inversely associated with systolic blood pressure and high-density lipoprotein cholesterol (β=-0.450 [-0.760, -0.150] and -0.013 [-0.022, -0.003], respectively). After adjusting for potential confounders and daily sedentary time, daily breaks in sedentary time were inversely associated with glycated hemoglobin (β=-0.020 [-0.037, -0.003]), and positively associated with both triglycerides and systolic blood pressure (β=0.006 [0.002, 0.010] and 0.030 [0.002, 0.050], respectively). The joint associations of prolonged sedentary time and moderate-to-vigorous physical activity with the prevalence of diabetes were not statistically significant.ConclusionProlonged sedentary time (≥ 60 minutes) and daily breaks in sedentary time were deleteriously associated with glycated hemoglobin, although we found no evidence that there were joint moderate-to-vigorous physical activity and sitting associations.

Abstract 404: Altered Interaction of Modified High Density Lipoprotein with Scavenger Receptor BI

2013 ◽  
Vol 33 (suppl_1) ◽  
Author(s):  
Alexandra C Chadwick ◽  
Rebecca L Holme ◽  
Paula-Dene C Nesbeth ◽  
Kirkwood A Pritchard ◽  
Daisy Sahoo
Keyword(s):  
Oxidative Stress ◽  
High Density Lipoprotein ◽  
Scavenger Receptor ◽  
Density Lipoprotein ◽  
High Density ◽  
Cholesterol Transport ◽  
Selective Uptake ◽  
Peripheral Tissues ◽  
Scavenger Receptor Bi ◽  
Hdl Function

High density lipoprotein (HDL) combats atherosclerosis, largely through its role in the reverse cholesterol transport (RCT) pathway where excess cholesterol from peripheral tissues is transported by HDL to the liver for excretion. High HDL-cholesterol (HDL-C) levels have been traditionally linked to a lower risk for cardiovascular disease (CVD). However, recent evidence suggests that HDL “function”, rather than HDL levels, is a better indicator of CVD risk as modifications to HDL under oxidative stress can render the particles “dysfunctional”. Scavenger receptor BI (SR-BI), the HDL receptor, mediates the selective uptake of HDL-cholesteryl ester (CE) into the liver during RCT. We hypothesized that SR-BI would be unable to mediate its cholesterol transport functions in the presence of oxidized or modified HDL due to an inability to engage in productive binding interactions with modified ligands. To test this hypothesis, we assessed HDL binding and selective uptake of HDL-CE in COS7 cells transiently expressing SR-BI using native HDL or HDL modified with: 1) copper (Cu2+), 2) 4-hydroxynonenal (HNE), or 3) acrolein. Our data revealed that, compared to native HDL, SR-BI bound 20-50% less Cu2+-HDL and acrolein-HDL, and mediated 40%-60% less selective uptake of CE from these modified particles, respectively. On the other hand, while SR-BI was able to bind HNE-HDL, it could not efficiently mediate cholesterol uptake (20% less compared to native HDL). Interestingly, our data also revealed that the ability of SR-BI to mediate the release of free cholesterol from COS7 cells did not differ when modified HDL served as acceptor particles, as compared to native HDL. Taken together, only the HDL binding and HDL-CE selective uptake functions of SR-BI are influenced by the type of modification on the HDL particle. These data have significant implications as they suggest that higher levels of plasma HDL-C may, in part, be the result of the inability of SR-BI to recognize and mediate cholesterol removal from HDL particles that have been exposed to oxidative stress. More detailed investigations of the interactions between SR-BI and various populations of oxidized HDL will improve our understanding of the mechanisms that render HDL dysfunctional, and ultimately, atherogenic.

Association of Physical Activity and Cardiometabolic Risk in Children 3–12 Years

2020 ◽  
Vol 17 (8) ◽  
pp. 800-806
Author(s):  
Leigh M. Vanderloo ◽  
Jonathan L. Maguire ◽  
David W. H. Dai ◽  
Patricia C. Parkin ◽  
Cornelia M. Borkhoff ◽  
...  
Keyword(s):  
Physical Activity ◽  
Blood Pressure ◽  
High Density Lipoprotein ◽  
Systolic Blood Pressure ◽  
High Density Lipoprotein Cholesterol ◽  
Density Lipoprotein ◽  
High Density ◽  
Lipoprotein Cholesterol ◽  
Height Ratio ◽  
Waist To Height Ratio

Background: This study aimed to examine the association between physical activity (PA) and a total cardio metabolic risk (CMR) score in children aged 3–12 years. Secondary objectives were to examine the association between PA and individual CMR factors. Methods: A longitudinal study with repeated measures was conducted with participants from a large primary care practice-based research network in Toronto, Canada. Mixed effects models were used to examine the relationship between parent-reported physical activity and outcome variables (total CMR score, triglycerides, glucose, high-density lipoprotein cholesterol, systolic blood pressure, waist circumference, weight-to-height ratio, and non-high-density lipoprotein cholesterol). Results: Data from 1885 children (6.06 y, 54.4% male) with multiple visits (n = 2670) were included in the analyses. For every unit increase of 60 minutes of PA, there was no evidence of an association with total CMR score (adjusted: −0.02 [−0.014 to 0.004], P = .11]. For the individual CMR components, there was evidence of a weak association between PA and systolic blood pressure (−0.01 [−0.03 to −0.01], P < .001) and waist-to-height ratio (−0.81 [−1.62 to −0.003], P < .001). Conclusion: Parent-reported PA among children aged 3–12 years was not statistically associated with total CMR, but was weakly associated with systolic blood pressure and waist-to-height ratio.

scholarly journals Does high-density lipoprotein protect vascular function in healthy pregnancy?

2016 ◽  
Vol 130 (7) ◽  
pp. 491-497 ◽  
Author(s):  
Wan N. Wan Sulaiman ◽  
Muriel J. Caslake ◽  
Christian Delles ◽  
Helen Karlsson ◽  
Monique T. Mulder ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
High Density Lipoprotein ◽  
Vascular Endothelium ◽  
Vascular Function ◽  
Cell Damage ◽  
Density Lipoprotein ◽  
High Density ◽  
Major Protein ◽  
Protective Effects ◽  
In Pregnancy

The maternal adaptation to pregnancy includes hyperlipidaemia, oxidative stress and chronic inflammation. In non-pregnant individuals, these processes are usually associated with poor vascular function. However, maternal vascular function is enhanced in pregnancy. It is not understood how this is achieved in the face of the adverse metabolic and inflammatory environment. Research into cardiovascular disease demonstrates that plasma HDL (high-density lipoprotein), by merit of its functionality rather than its plasma concentration, exerts protective effects on the vascular endothelium. HDL has vasodilatory, antioxidant, anti-thrombotic and anti-inflammatory effects, and can protect against endothelial cell damage. In pregnancy, the plasma HDL concentration starts to rise at 10 weeks of gestation, peaking at 20 weeks. The initial rise in plasma HDL occurs around the time of the establishment of the feto-placental circulation, a time when the trophoblast plugs in the maternal spiral arteries are released, generating oxidative stress. Thus there is the intriguing possibility that new HDL of improved function is synthesized around the time of the establishment of the feto-placental circulation. In obese pregnancy and, to a greater extent, in pre-eclampsia, plasma HDL levels are significantly decreased and maternal vascular function is reduced. Wire myography studies have shown an association between the plasma content of apolipoprotein AI, the major protein constituent of HDL, and blood vessel relaxation. These observations lead us to hypothesize that HDL concentration, and function, increases in pregnancy in order to protect the maternal vascular endothelium and that in pre-eclampsia this fails to occur.

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