Publication:
Extension of life-span using a RNAi model and in vivo antioxidant effect of Opuntia fruit extracts and pure betalains in Caenorhabditis elegans

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Date
2018-09-11
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Authors
Guerrero Rubio, M. Alejandra ; Hernández García, Samanta ; Gandía Herrero, Fernando ; García Carmona, Francisco
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Publisher
Elsevier
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Bioquímica y Biología Molecular A
DOI
https://doi.org/10.1016/j.foodchem.2018.09.067
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Description
© 2018 The Authors. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ This document is the Submitted, Accepted, Published Manuscript, version of a Published Work that appeared in final form in Food Chemistry. To access the final edited and published work see https://doi.org/10.1016/j.foodchem.2018.09.067
Abstract
Betalains are nitrogenous plant pigments known for their high antioxidant capacity. For the first time, this antioxidant nature has been studied in an in vivo system using the model organism Caenorhabditis elegans. The oxidative stress caused in the fluorescent strain TJ375 (hsp-16.2::GFP) was reversed by the presence of both natural and semi-synthetic betalains, with an ED50 value around 25 μM for betacyanins and up to 10 μM for betaxanthins, with indicaxanthin, the major pigments in prickly pear fruits, as the most effective betalain. The effect of model betalains on the lifespan of the wild-type N2 strain was carefully studied using the automatic platform “Lifespan Machine”. In a search for different approaches to suppress progeny, pop-1 RNAi was used to avoid FUdR use. The presence of betalains in the medium, both as pure compounds and as enriched Opuntia extracts significantly increased the lifespan of C. elegans
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C. elegans , Lifespan , Antioxidant , In vivo , Green fluorescent protein
Citation
Food Chemistry, 2019, Vol. 274, pp. 840-847
URI
http://hdl.handle.net/10201/155720
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