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Published in: BMC Complementary Medicine and Therapies 1/2013

Open Access 01-12-2013 | Research article

Biological properties of carotenoids extracted from Halobacterium halobium isolated from a Tunisian solar saltern

Authors: Molka Abbes, Houda Baati, Sonda Guermazi, Concetta Messina, Andrea Santulli, Neji Gharsallah, Emna Ammar

Published in: BMC Complementary Medicine and Therapies | Issue 1/2013

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Abstract

Background

Bioactive molecules have received increasing attention due to their nutraceutical attributes and anticancer, antioxidant, antiproliferative and apoptosis-inducing properties. This study aimed to investigate the biological properties of carotenoids extracted from Archaea.

Methods

Halophilic Archaea strains were isolated from the brine of a local crystallizer pond (TS7) of a solar saltern at Sfax, Tunisia. The most carotenoid-producing strain (M8) was investigated on heptoma cell line (HepG2), and its viability was assessed by the MTT-test. The cells were incubated with different sub-lethal extract rates, with carotenoid concentrations ranging from 0.2 to 1.5 μM. Antioxidant activity was evaluated through exposing the cells to sub-lethal extract concentrations for 24 hours and then to oxidative stress induced by 60 μM arachidonic acid and 50 μM H2O2.

Results

Compared to non-treated cells, bacterial carotenoid extracts inhibited HepG2 cell viability (50%). A time and dose effect was observed, with cell viability undergoing a significant (P < 0.05) decrease with extract concentration. After exposure to oxidative stress, control cells underwent a significant (P < 0.05) decrease in viability as compared to the non-treated cells.

Conclusions

The bacterial extracts under investigation were noted to exhibit the strongest free radical scavenging activity with high carotenoid concentrations. The carotenoid extract also showed significant antiproliferative activity against HepG2 human cancer cell lines.
Appendix
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Metadata
Title
Biological properties of carotenoids extracted from Halobacterium halobium isolated from a Tunisian solar saltern
Authors
Molka Abbes
Houda Baati
Sonda Guermazi
Concetta Messina
Andrea Santulli
Neji Gharsallah
Emna Ammar
Publication date
01-12-2013
Publisher
BioMed Central
Published in
BMC Complementary Medicine and Therapies / Issue 1/2013
Electronic ISSN: 2662-7671
DOI
https://doi.org/10.1186/1472-6882-13-255

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BMC Complementary Medicine and Therapies 1/2013 Go to the issue