Diabetes Mellitus, Type 2 Clinical Trial
Official title:
Heart Rate Variability in Response to Metformin Challenge
Diseases caused by brain energy supply defects can be innate (fibromyalgia secondary to familial mitochondrial disorders) or acquired (tardive dyskinesia or weight gain associated with prolonged antipsychotic use). Patients with these possible mitochondrial disorders will provide a baseline resting heart rate sample, ingest low-dose metformin (500 mg), and then provide an additional sample 2 hours later.
Doctors need to develop tests which inexpensively and reliably evaluates brain metabolism.
Current diagnostic tests sample other tissues which often run on different fuels (fats),
utilize unproven and often insensitive brain imaging scanners, or sequence thousands to
millions of base-pairs of DNA. All of these tests are expensive. None of these tests
accurately or completely capture the interactions between the 1000s of proteins involved in
brain metabolism.
The investigators suspect that mathematical analysis of the resting heart rate may provide
some insight into brain metabolism. The brain controls heart rate in response to changes in
blood pressure and blood gases like carbon dioxide and oxygen. Tight control of heart rate is
necessary to make sure that the brain has the right mix of fuel and air. Because the brain
can't respond instantly to changes in its fuel supply, this system acting as a biological
carburetor has a natural oscillatory rhythm that can be monitored just like frequencies on
the radio.
The investigators propose to amplify these rhythms by modestly metabolically stressing the
brain with metformin, a inhibitor of complex 1 in the mitochondria.
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