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Title

Resveratrol and Clinical Trials: The Crossroad from In Vitro Studies to Human Evidence

AuthorsTomé-Carneiro, Joao ; Larrosa, Mar ; González-Sarrías, Antonio ; Tomás Barberán, Francisco ; García-Conesa, María Teresa ; Espín de Gea, Juan Carlos
KeywordsResveratrol
Clinical trials
Cardiovascular
Cancer
Nutraceutical
Polyphenol
Issue Date2013
PublisherBentham Science Publishers
CitationCurrent Pharmaceutical Design 19(34): 6064-6093 (2013)
AbstractResveratrol (3,5,4’-trihydroxy-trans-stilbene) is a non-flavonoid polyphenol that may be present in a limited number of foodstuffs such as grapes and red wine. Resveratrol has been reported to exert a plethora of health benefits through many different mechanisms of action. This versatility and presence in the human diet have drawn the worldwide attention of many research groups over the past twenty years, which has resulted in a huge output of in vitro and animal (preclinical) studies. In line with this expectation, many resveratrol- based nutraceuticals are consumed all over the world with questionable clinical/scientific support. In fact, the confirmation of these benefits in humans through randomized clinical trials is still very limited. The vast majority of preclinical studies have been performed using assay conditions with a questionable extrapolation to humans, i.e. too high concentrations with potential safety concerns (adverse effects and drug interactions), short-term exposures, in vitro tests carried out with non-physiological metabolites and/or concentrations, etc. Unfortunately, all these hypothesis-generating studies have contributed to increased the number of ‘potential’ benefits and mechanisms of resveratrol but confirmation in humans is very limited. Therefore, there are many issues that should be addressed to avoid an apparent endless loop in resveratrol research. The so-called ‘Resveratrol Paradox’, i.e., low bioavailability but high bioactivity, is a conundrum not yet solved in which the final responsible actor (if any) for the exerted effects has not yet been unequivocally identified. It is becoming evident that resveratrol exerts cardioprotective benefits through the improvement of inflammatory markers, atherogenic profile, glucose metabolism and endothelial function. However, safety concerns remain unsolved regarding chronic consumption of high RES doses, specially in medicated people. This review will focus on the currently available evidence regarding resveratrol’s effects on humans obtained from randomized clinical trials. In addition, we will provide a critical outlook for further research on this molecule that is evolving from a minor dietary compound to a possible multi-target therapeutic drug.
Publisher version (URL)http://doi.org/10.2174/13816128113199990407
URIhttp://hdl.handle.net/10261/152150
DOI10.2174/13816128113199990407
ISSN1381-6128
E-ISSN1873-4286
Appears in Collections:(CEBAS) Artículos
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