Journal of Pure and Applied MicrobiologyVol. 7 No. 4

Halophilic Bacteria-A Potent Source of Carotenoids with Antioxidant and Anticancer Potentials

Shahitha Sikkandar1*, Kasi Murugan2, Saleh Al-Sohaibani2, Flora Rayappan3, Aneesh Nair3 and Florida Tilton3

1Department of Microbiology, K.S.R. College of Arts and Science, Tiruchengode, India. 2Department of Botany and Microbiology, College of Science, King Saud University, Riyadh, Saudi Arabia. 3Biozone Research Technologies Pvt Ltd, Chennai, India.

Received on 30 April 2013 and accepted on 10 June 2013



Halophiles are known to be potent sources of commercially exploitable substances. Recent interest in the halophile research has its focus on the medicinal properties of these microorganisms. In the current study, an attempt was made to isolate carotenoids from two strains of halophilic bacteria ? Halobacterium salinarium and Haloferox volcanii. Media optimization was carried out and H. salinarium was found to produce the maximum yield of carotenoids among the strains. The isolated carotenoids were tested for their free radical scavenging activity by DPPH assay and the results validated the known antioxidant activity of carotenoids. A further analysis of the cytotoxic properties of the carotenoids against human liver cancer cell lines hinted at their anticancer properties. This work is a contribution to the recent research on alternative natural sources of medicine.

Keywords : Halophilic bacteria, Anticancer potentials, Carotenoids.