Abstract Title:

Characterization of microalgal carotenoids by mass spectrometry and their bioavailability and antioxidant properties elucidated in rat model.

Abstract Source:

J Agric Food Chem. 2010 Aug 11;58(15):8553-9. PMID: 20681642

Abstract Author(s):

A Ranga Rao, R L Raghunath Reddy, V Baskaran, R Sarada, G A Ravishankar

Article Affiliation:

Plant Cell Biotechnology Department, Central FoodTechnological Research Institute, A Constituent Laboratory of Council of Scientific&IndustrialResearch, Mysore-570 020, Karnataka, India.

Abstract:

Of the total carotenoids in respective algal samples, beta-carotene in Spirulina platensis was 69.5%, astaxanthin and its esters in Haematococcus pluvialis was 81.38%, and lutein in Botryococcus braunii was 74.6%. The carotenoids were characterized by mass spectrometry. A time-course study of carotenoids in rats after administration of microalgal biomass showed peak levels in plasma, liver, and eyes at 2, 4, and 6 h, respectively. Beta-carotene accumulation in Spirulina-fed rats was maximum in eye tissues at 6 h. Similarly, levels of astaxanthin and lutein in Haematococcus- and Botryococcus-fed rats were also maximal in eye tissues. Astaxanthin from H. pluvialis showed better bioavailability than beta-carotene and lutein. The antioxidant enzymes, catalase, superoxide dismutase, peroxidase, and TBARS were significantly high in plasma at 2 h and in liver at 4 h, evidently offering protection from free radicals. This study implies that microalgae can be a good source of carotenoids of high bioavailability and nutraceutical value.

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