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Physical activity and alpha-lipoic acid modulate inflammatory response through changes in thiol redox status
A Zembron-Lacny1, M Gajewski, M Naczk
1Faculty of Physical Culture Gorzow Wlkp, University School of Physical Education Poznan, Poznan, Poland. agzem@gorzow.home.pl
Journal of Physiology and Biochemistry
|November 27, 2012
Summary
Alpha-lipoic acid (αLA) supplementation enhances skeletal muscle regeneration after intense exercise by modulating inflammatory responses. It alters hydrogen peroxide (H2O2) and nitric oxide (NO) levels, improving thiol redox status and cytokine profiles.
Area of Science:
- Exercise Physiology
- Biochemistry
- Cell Signaling
Background:
- Alpha-lipoic acid (αLA) is a key modulator of cellular redox status, influencing hydrogen peroxide (H2O2) and nitric oxide (NO) generation.
- Thiol redox status is crucial in cell signaling pathways and inflammatory responses.
Purpose of the Study:
- To investigate the effects of αLA supplementation on inflammatory markers and redox status following strenuous exercise.
- To determine if αLA influences skeletal muscle regeneration by altering H2O2, NO, and thiol redox status.
Main Methods:
- A randomized controlled trial with 16 physically active males assigned to placebo or αLA (1,200 mg/day for 10 days) groups.
- Participants underwent a 90-min run followed by a 15-min eccentric phase.
- Blood samples were analyzed for H2O2, NO, thiol redox status (GSHtotal-2GSSG/GSSG), cytokines (IL-6, IL-10, IL-1β, TNF-α), and creatine kinase.
Main Results:
- αLA significantly increased H2O2 and thiol redox status, while decreasing NO generation.
- αLA elevated interleukin-6 (IL-6) and IL-10 levels post-exercise and decreased interleukin-1β and tumor necrosis factor-α.
- Creatine kinase activity showed a trend towards lower values with αLA intake, suggesting improved muscle recovery.
Conclusions:
- αLA supplementation, combined with intense exercise, may enhance skeletal muscle regeneration.
- These benefits are likely mediated by αLA's influence on inflammatory responses, H2O2 and NO generation, and thiol redox status.
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