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Mar. Drugs 2017, 15(11), 353; doi:10.3390/md15110353

An Insight into Sargassum muticum Cytoprotective Mechanisms against Oxidative Stress on a Human Cell In Vitro Model

MARE—Marine and Environmental Sciences Centre, School of Tourism and Maritime Technology, Polytechnic Institute of Leiria, 2520-641 Peniche, Portugal
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Received: 10 May 2017 / Revised: 17 October 2017 / Accepted: 4 November 2017 / Published: 10 November 2017
(This article belongs to the Special Issue Nutraceuticals and Functional Foods)
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Abstract

Sargassum muticum is a brown seaweed with strong potential to be used as a functional food ingredient, mainly due to its antioxidant properties. It is widely used in traditional oriental medicine for the treatment of numerous diseases. Nevertheless, few studies have been conducted to add scientific evidence on its effects as well as on the mechanisms of action involved. In this work, the human cell line MCF-7 was used as an in vitro cellular model to evaluate the capability of Sargassum muticum enriched fractions to protect cells on an oxidative stress condition. The concentration of the bioactive compounds was obtained by vacuum liquid chromatography applied on methanol (M) and 1:1 methanol:dichloromethane (MD) crude extracts, resulting in seven enriched fractions from the M extraction (MF2–MF8), and eight fractions from the MD extraction (MDF1–MDF8). All fractions were tested for cytotoxic properties on MCF-7 cells and the nontoxic ones were tested for their capacity to blunt the damaging effects of hydrogen peroxide-induced oxidative stress. The nontoxic effects were also confirmed in 3T3 fibroblast cells as a nontumor cell line. The antioxidant potential of each fraction, as well as changes in the cell’s real-time hydrogen peroxide production, in the mitochondrial membrane potential, and in Caspase-9 activity were evaluated. The results suggest that the protective effects evidenced by S. muticum can be related with the inhibition of hydrogen peroxide production and the inhibition of Caspase-9 activity. View Full-Text
Keywords: antioxidant compounds; brown algae; Caspase-9; cell death mechanisms; cytoprotection; marine natural compounds; MCF-7 cells; mitochondrial membrane potential; reactive oxygen species (ROS); seaweed antioxidant compounds; brown algae; Caspase-9; cell death mechanisms; cytoprotection; marine natural compounds; MCF-7 cells; mitochondrial membrane potential; reactive oxygen species (ROS); seaweed
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Pinteus, S.; Lemos, M.F.L.; Silva, J.; Alves, C.; Neugebauer, A.; Freitas, R.; Duarte, A.; Pedrosa, R. An Insight into Sargassum muticum Cytoprotective Mechanisms against Oxidative Stress on a Human Cell In Vitro Model. Mar. Drugs 2017, 15, 353.

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