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Antioxidant Properties and Neuroprotective Capacity of Strawberry Tree Fruit (Arbutus unedo)
Disease & Stress Biology, Instituto de Tecnologia Química e Biológica, Universidade Nova de Lisboa, 2781-901 Oeiras, Portugal
Animal Cell Technology Unit, Instituto de Tecnologia Química e BiológicaUniversidade Nova de Lisboa/Instituto de Biologia Experimental e Tecnológica, 2781-901 Oeiras, Portugal
Plant Products and Food Quality Programme, Scottish Crop Research Institute, Dundee, DD2 5DA, Scotland, UK
Departamento de Botânica e Engenharia Biológica, Instituto Superior de Agronomia, Universidade Técnica de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal
* Author to whom correspondence should be addressed.
Received: 16 December 2009; Accepted: 9 February 2010 / Published: 21 February 2010
Abstract: Berries contain significant amounts of phytochemicals, including polyphenols, which are reported to reduce cancer risk, coronary heart disease and other degenerative diseases. These effects are mainly attributed to the antioxidant capacity of polyphenols found in berries. Strawberry tree (Arbutus unedo) berries are used in folk medicine but seldom eaten as fresh fruits. Their phenolic profile and antioxidant capacity reveal a high potential, but they are not well characterized as a “health promoting food”. The aim of this study was to assess the antioxidant properties of the edible strawberry tree fruit in vitro and in a neurodegeneration cell model. Raspberry (Rubus idaeus), a well documented health-promoting fruit, was used as a control for comparison purposes. A. unedo yielded a similar content in polyphenols and a slightly lower value of total antioxidant capacity in comparison to R. idaeus. Although the chemically-measured antioxidant activity was similar between both fruits, R. idaeus increased neuroblastoma survival in a neurodegeneration cell model by 36.6% whereas A. unedo extracts caused no effect on neuroblastoma viability. These results clearly demonstrate that a promising level of chemically-determined antioxidant activity of a plant extract is not necessarily correlated with biological significance, as assessed by the effect of A. unedo fruit in a neurodegeneration cell model.
Keywords: polyphenols; flavonoids; antioxidants; neuroprotection; strawberry tree
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MDPI and ACS Style
Fortalezas, S.; Tavares, L.; Pimpão, R.; Tyagi, M.; Pontes, V.; Alves, P.M.; McDougall, G.; Stewart, D.; Ferreira, R.B.; Santos, C.N. Antioxidant Properties and Neuroprotective Capacity of Strawberry Tree Fruit (Arbutus unedo). Nutrients 2010, 2, 214-229.
Fortalezas S, Tavares L, Pimpão R, Tyagi M, Pontes V, Alves PM, McDougall G, Stewart D, Ferreira RB, Santos CN. Antioxidant Properties and Neuroprotective Capacity of Strawberry Tree Fruit (Arbutus unedo). Nutrients. 2010; 2(2):214-229.
Fortalezas, Sofia; Tavares, Lucélia; Pimpão, Rui; Tyagi, Meenu; Pontes, Vera; Alves, Paula M.; McDougall, Gordon; Stewart, Derek; Ferreira, Ricardo B.; Santos, Cláudia N. 2010. "Antioxidant Properties and Neuroprotective Capacity of Strawberry Tree Fruit (Arbutus unedo)." Nutrients 2, no. 2: 214-229.