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Lovastatin decreases coenzyme Q levels in rats
R A Willis1, K Folkers, J L Tucker
1Division of Graduate Nutrition, University of Texas, Austin 78712.
Summary
Lovastatin treatment lowers coenzyme Q (CoQ) levels in rats by inhibiting a key enzyme. Supplementing with CoQ10 effectively restored CoQ concentrations in tissues, demonstrating a way to counteract this effect.
Area of Science:
- Biochemistry
- Pharmacology
- Nutritional Science
Background:
- Lovastatin, a hypercholesterolemia treatment, inhibits HMG-CoA reductase, impacting mevalonic acid synthesis.
- Mevalonic acid is crucial for both cholesterol and coenzyme Q (CoQ) biosynthesis.
- Potential for lovastatin to reduce cellular CoQ levels was hypothesized.
Purpose of the Study:
- To investigate if lovastatin treatment decreases CoQ levels in animal tissues.
- To determine if CoQ supplementation can prevent or reverse lovastatin-induced CoQ depletion.
Main Methods:
- Forty-five male rats were divided into control, lovastatin-treated, and lovastatin + CoQ10 supplemented groups.
- Lovastatin was administered orally for 4 weeks at 400 mg/kg diet.
- CoQ10 (15 mg/kg body weight) was administered daily via stomach intubation to one lovastatin group.
Main Results:
- Lovastatin treatment significantly decreased CoQ concentrations in heart, liver, and blood samples.
- Rats receiving both lovastatin and CoQ10 supplementation showed CoQ levels comparable to or exceeding control levels.
- CoQ10 supplementation effectively counteracted the depletion of CoQ caused by lovastatin.
Conclusions:
- Lovastatin therapy demonstrably lowers tissue CoQ concentrations.
- CoQ10 supplementation is effective in restoring normal CoQ levels in lovastatin-treated animals.
- This highlights the biochemical link between HMG-CoA reductase inhibition and CoQ biosynthesis.