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Isolation and Analysis of Plasma Lipoproteins by Ultracentrifugation
Published on: January 28, 2021
Chronic dynamic exercise increases apolipoprotein A-I expression in rabbit renal cortex as determined by proteomic
R de Moraes1, R H Valente, I R León
1Physiology and Pharmacodynamics Department, Oswaldo Cruz Institute, FIOCRUZ, Brazil.
British Journal of Sports Medicine
|August 25, 2007
Summary
Chronic dynamic exercise significantly increases apolipoprotein A-I expression in the rabbit renal cortex. This finding may explain exercise-induced changes in renal circulation.
Area of Science:
- Nephrology
- Exercise Physiology
- Proteomics
Background:
- Previous research demonstrated exercise training improves vascular relaxation in the rabbit kidney.
- Understanding molecular adaptations in the renal cortex following exercise is crucial.
Purpose of the Study:
- To investigate protein expression alterations in the rabbit renal cortex induced by chronic dynamic exercise.
- To identify specific proteins modulated by exercise training in the kidney.
Main Methods:
- Kidneys were analyzed from sedentary and endurance-trained New Zealand rabbits.
- Proteomic analysis involved 2D-PAGE, colloidal Coomassie staining, and mass spectrometry.
- Peptide sequencing identified differentially expressed proteins.
Main Results:
- Apolipoprotein A-I expression showed a threefold increase in trained rabbits compared to sedentary controls.
- The identified protein, apolipoprotein A-I, presented as two distinct spots on 2D gels.
- Mass spectrometry confirmed the identity of the differentially expressed protein.
Conclusions:
- Chronic dynamic exercise upregulates apolipoprotein A-I expression in the rabbit renal cortex.
- Increased apolipoprotein A-I may contribute to exercise-related modifications in renal circulation.
- This study provides molecular insights into the renal adaptations to exercise.
