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Deguelin is one of four major naturally occurring rotenoids isolated from root extracts and is best recognized as a NADH: ubiquinone oxidoreductase (complex I) inhibitor, resulting in significant alterations in mitochondrial function. Deguelin has also been implicated as a regulator of apoptosis
An unusually high frequency of atypical Parkinson syndrome has been delineated over the last 5 years in the French West Indies. Postural instability with early falls, prominent frontal lobe dysfunction and pseudo-bulbar palsy were common and three-quarters of the patients were L-dopa unresponsive.
Rotenone and deguelin are the major active ingredients and principal components of cuberesin from Lonchocarpus utilis used as a botanical insecticide and piscicide. They are also potent complex I (NADH:ubiquinone oxidoreductase) inhibitors. Rotenone was known earlier, and deguelin is shown here to