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Changes in HDL composition in female subjects following a 100-km run
Insights
A 100-km run significantly altered high-density lipoprotein (HDL) structure in female athletes. Post-run, HDL cholesterol and apolipoprotein A-I increased, indicating changes in lipid metabolism and HDL composition.
Area of Science:
- Exercise Physiology
- Lipid Metabolism
- Biochemistry
Background:
- High-density lipoprotein (HDL) plays a crucial role in reverse cholesterol transport.
- Endurance exercise is known to influence lipid profiles, but its specific effects on HDL structure are less understood.
- Investigating changes in HDL components post-ultra-endurance running provides insights into exercise-induced metabolic adaptations.
Purpose of the Study:
- To examine the impact of a 100-km run on the concentrations of various HDL components in female athletes.
- To compare HDL profiles of runners with a control group to identify exercise-specific alterations.
- To determine if ultra-endurance running induces changes in HDL particle composition and structure.
Main Methods:
- Blood samples were collected from 12 female athletes before and after a 100-km run.
- Concentrations of total cholesterol, triglycerides, and specific HDL components (cholesterol, cholesteryl ester, unesterified cholesterol, phosphatidyl choline, apolipoprotein A-I, apolipoprotein A-II) were measured.
- A control group of female company employees was used for comparison.
Main Results:
- HDL unesterified cholesterol, HDL phosphatidyl choline, and HDL apolipoprotein A-I were higher in runners compared to controls.
- Post-run, triglycerides and total cholesterol decreased significantly (70% and 10%, respectively).
- HDL cholesterol and HDL apolipoprotein A-I increased post-run (p<0.01, p<0.05), while HDL phosphatidyl choline decreased (p<0.01), suggesting a structural shift in HDL particles.
Conclusions:
- A 100-km run induces significant alterations in HDL structure among female athletes.
- The observed changes in HDL components indicate a shift towards a potentially more atheroprotective HDL profile post-exercise.
- These findings highlight the profound impact of ultra-endurance exercise on lipoprotein metabolism and structure.
Abstract:
In 12 female subjects participating in a 100-km run, the concentrations of cholesterol and triglycerides as well as those of HDL components (total cholesterol, cholesteryl ester, unesterified cholesterol, phosphatidyl choline, apolipoprotein A-I, and apolipoprotein A-II) were measured before and after the run. The concentrations of HDL unesterified cholesterol, HDL phosphatidyl choline, and HDL apolipoprotein A-I of the participants of the 100-km run were higher than the corresponding values of a control group of female company employees, whereas there was no difference in triglycerides, total cholesterol. HDL cholesterol, and HDL apolipoprotein A-II. Values of triglycerides and total cholesterol ascertained after the run were clearly decreased when compared to pre-exercise values (by 70% and 10%, respectively). Also, total protein content of the serum was marginally reduced after the run. Considering the reduction in protein level. HDL cholesterol and HDL apolipoprotein A-I values were raised after the run (P less than 0.01, P less than 0.05, respectively) while HDL phosphatidyl choline values decreased irrespective of the reduction in total protein (P less than 0.01). The quotients HDL cholesterol / total cholesterol as well as HDL cholesterol / HDL phosphatidyl choline were clearly higher after the run than before (P less than 0.01). The HDL apolipoprotein A-II level did not change post-exercise. These results indicate a change in the structure of HDL following a 100-km run in female athletes.