The Indian Journal of Nutrition and Dietetics

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Effect of a Single Session of Acute Aerobic Exercise on the Activities of High Density Lipoprotein Enzymes


Affiliations
1 Division of Nutrition, St John’s Research Institute, Bangalore, India
2 Department of Biochemistry, St. John’s Medical College and Hospital, Bangalore, India
     

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High Density Lipoprotein (HDL) is considered to be an anti-atherogenic molecule and its beneficial function is driven by a number of enzymes such as LCAT (Lecithin Cholesterol Acyl Transferase), PON1 (Paraoxonase 1), PAF-AH (Platelet-Activating Factor Acetyl Hydrolase) and CETP (Cholesteryl Ester Transfer Protein). Low HDL-C level is the most prevalent dyslipidemia seen in India and exercise is one reliable way to improve its levels. While acute exercise is known to increase HDL-C levels, not much is known about its effects on HDL functions. This study was aimed at assessing the effect of a single bout of acute aerobic exercise on key HDL functions. Ten healthy adult male volunteers (20-35 years) were made to exercise at 65-80% VO2 max to expend 200 Kcal using a modified Bruce protocol. Plasma samples were collected at different time points (before exercise, 15 min, 1 hour, 2 hours, 4 hours, 24 hours, 48 hours post-exercise) for analysis of HDL anti-inflammatory function and its related enzyme activities. Friedman ANOVA followed by post-hoc Wilcoxon matched pair test, showed that PON1 activity increased immediately but reached significance 48 hours post-exercise (Z=-2.666, p=0.008). CETP and LCAT activities were decreased significantly at the 4th hour post-exercise and continued to be low even up to 48 hours (Z=-2.666, p=0.008), whereas HDL-C levels, MPO activity and HDL-II did not vary significantly at different time points. Enhanced activity of the antioxidant enzyme PON1, in combination with decreased activities of pro-atherogenic enzymes CETP and LCAT suggest that even a single bout of acute exercise could be effective in eliciting athero-protective changes in HDL function independent of HDL-C levels.

Keywords

Acute Exercise, Antioxidant Enzymes, CETP, HDL-C, PON1.
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  • Effect of a Single Session of Acute Aerobic Exercise on the Activities of High Density Lipoprotein Enzymes

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Authors

Priyanka S. Bannikoppa
Division of Nutrition, St John’s Research Institute, Bangalore, India
Sheila Uthappa
Department of Biochemistry, St. John’s Medical College and Hospital, Bangalore, India
Tinku Thomas
Division of Nutrition, St John’s Research Institute, Bangalore, India
Anura V. Kurpad
Division of Nutrition, St John’s Research Institute, Bangalore, India
Indu Mani
Division of Nutrition, St John’s Research Institute, Bangalore, India

Abstract


High Density Lipoprotein (HDL) is considered to be an anti-atherogenic molecule and its beneficial function is driven by a number of enzymes such as LCAT (Lecithin Cholesterol Acyl Transferase), PON1 (Paraoxonase 1), PAF-AH (Platelet-Activating Factor Acetyl Hydrolase) and CETP (Cholesteryl Ester Transfer Protein). Low HDL-C level is the most prevalent dyslipidemia seen in India and exercise is one reliable way to improve its levels. While acute exercise is known to increase HDL-C levels, not much is known about its effects on HDL functions. This study was aimed at assessing the effect of a single bout of acute aerobic exercise on key HDL functions. Ten healthy adult male volunteers (20-35 years) were made to exercise at 65-80% VO2 max to expend 200 Kcal using a modified Bruce protocol. Plasma samples were collected at different time points (before exercise, 15 min, 1 hour, 2 hours, 4 hours, 24 hours, 48 hours post-exercise) for analysis of HDL anti-inflammatory function and its related enzyme activities. Friedman ANOVA followed by post-hoc Wilcoxon matched pair test, showed that PON1 activity increased immediately but reached significance 48 hours post-exercise (Z=-2.666, p=0.008). CETP and LCAT activities were decreased significantly at the 4th hour post-exercise and continued to be low even up to 48 hours (Z=-2.666, p=0.008), whereas HDL-C levels, MPO activity and HDL-II did not vary significantly at different time points. Enhanced activity of the antioxidant enzyme PON1, in combination with decreased activities of pro-atherogenic enzymes CETP and LCAT suggest that even a single bout of acute exercise could be effective in eliciting athero-protective changes in HDL function independent of HDL-C levels.

Keywords


Acute Exercise, Antioxidant Enzymes, CETP, HDL-C, PON1.

References