Coenzyme Q10 Study

Coenzyme Q10 Article

This oil-soluble vitamin-like substance is present in most eukaryotic cells, primarily in the mitochondria. It is a component of the electron transport chain and participates in aerobic cellular respiration, generating energy in the form of ATP. Ninety-five percent of the human body’s energy is generated this way. Therefore, those organs with the highest energy requirements – such as the heart and the liver – have the highest CoQ10 concentrations. CoQ is found in the membranes of many organelles. Since its primary function in cells is in generating energy, the highest concentration is found on the inner membrane of the mitochondrion. Some other organelles that contain CoQ10 include endoplasmic reticulum, peroxisomes, lysosomes, and vesicles.

Because of its ability to transfer electrons and therefore act as an antioxidant, Coenzyme Q is also used as a dietary supplement. When one is younger the body can synthesize Q10 from the lower-numbered ubiquinones such as Q6 or Q8. The elderly and sick may not be able to make enough, thus Q10 becomes a vitamin later in life and in illness.

Supplementation of Coenzyme Q10 is a treatment for some of the very rare and serious mitochondrial disorders and other metabolic disorders, where patients are not capable of producing enough coenzyme Q10 because of their disorder. Coenzyme Q10 is then prescribed by a physician. Supplementation of Coenzyme Q10 has been found to have a beneficial effect on the condition of some sufferers of migraine headaches.

So far, three studies have been done, of which two were small, did not have a placebo group, were not randomized, and were open-label. One was a double blind, randomized, placebo-controlled trial, which found statistically significant results despite its small sample size of 42 patients. Dosages were 150 to 300 mg/day. It is also being investigated as a treatment for cancer, and as relief from cancer treatment side effects.

Brain health and neurodegenerative diseases

Recent studies have shown that the antioxidant properties of Coenzyme Q10 benefit the body and the brain in animal models. Some of these studies indicate that coenzyme Q10 protects the brain from neurodegenerative disease such as Parkinson's, although it does not relieve the symptoms. Dosage was 300 mg per day.

Cardiac arrest

Another recent study shows a survival benefit after cardiac arrest if coenzyme Q10 is administered in addition to commencing active cooling to 32–34 degrees Celsius.

Blood pressure

There are several reports concerning the effect of CoQ10 on blood pressure in human studies. In a recent meta-analysis of the clinical trials of CoQ10 for hypertension, a research group led by Professor Frank Rosenfeldt (Director, Cardiac Surgical Research Unit, Alfred Hospital, Melbourne, Australia) reviewed all published trials of Coenzyme Q10 for hypertension, and assessed overall efficacy, consistency of therapeutic action, and side-effect incidence. Meta-analysis was performed in 12 clinical trials (362 patients) comprising three randomized controlled trials, one crossover study, and eight open-label studies. The research group concluded that coenzyme Q10 has the potential in hypertensive patients to lower systolic blood pressure by up to 17 mm Hg and diastolic blood pressure by up to 10 mm Hg without significant side-effects.

Lifespan

Studies have shown that low dosages of coenzyme Q10 reduce oxidation and DNA double-strand breaks, and a combination of a diet rich in polyunsaturated fatty acids and coenzyme Q10 supplementation leads to a longer lifespan in rats.