Evaluation of antioxidant potential of anthocyanin-rich hydro ethanol extract of Syzygium cumini fruit pulp in various in vitro models and in food supplement enriched with omega-3 fatty acids

Pritam Kumar Prasad 1, *, Abhishek Bhattacharya 1, 2, Ayan Paul 1, 3, Suparna Mandal Biswas 1 and Rabi Ranjan Chattopadhyay 1

1 Agricultural and Ecological Research Unit, Indian Statistical Institute, 203, Barrackpore Trunk Road, Kolkata – 700 108, India.
2 University of Nebraska Medical Center, USA.
3 Dr. Sudhir Chandra Sur Institute of Technology and Sports Complex, Kolkata, India.
 
Research Article
International Journal of Science and Research Archive, 2024, 12(02), 1833–1845.
Article DOI: 10.30574/ijsra.2024.12.2.1426
Publication history: 
Received on 25 June 2024; revised on 04 August 2024; accepted on 07 August 2024
 
Abstract: 
Omega-3 fatty acids have immense health benefits but are highly susceptible to oxidation due to high degree of unsaturation in their molecular structure. Therefore, development of omega-3 fatty acids fortified stable functional food is a challenging task. The aim of the study was to evaluate antioxidant potential of anthocyanin-rich hydro ethanol extract of Syzygium cumini fruit pulp extract in various in vitro models and in omega-3 fatty acids enriched food supplement in bulk oil and oil-in-water emulsions model systems along with chemical analysis of the fruit pulp extract and evaluation of its cytotoxic potential, if any. The in vitro antioxidant potential was evaluated by DPPH radical scavenging, ABTS°+ decolorization and Fe2+ ion chelating methods. Antioxidant activity against oxidation of omega-3 fatty acids enriched food supplement in bulk oil and oil-in-water emulsions model systems was evaluated by monitoring primary oxidation, secondary oxidation and total oxidation of the omega-3 enriched oil using AOCS guidelines and iodometric method. Chemical analysis was performed by HR-LCMS analysis technique. Cytotoxic potential was evaluated by Allium cepa test. The test extract exhibited varying degrees of antioxidant activity in various in vitro models as well as against oxidation of omega-3 fatty acids enriched food supplement both in bulk oil and oil-in-water emulsions model systems. Chemical analysis revealed the presence of three major tentatively identified compounds malvidin-3,5-diglucoside, delphinidin-3,5-diglucoside and peonidin-3,5-diglucoside as major components of the extract. Test extract did not show any cytotoxic potential at recommended dosage level with LC50> 1000 µg/ml. The results provide evidence that anthocyanin-rich hydro ethanol extract of Syzygium cumini fruit pulp may serve as a potential source of safe and effective, novel natural antioxidant for retarding oxidation of omega-3 fatty acids enriched food supplement which subsequently may help to develop omega-3 fortified stable functional foods in food industry.
 
Keywords: 
Oxidation of lipids; Omega-3 fatty acids; Auto-oxidation; S. cumini fruit pulp; Natural antioxidants; Omega-3 fortified functional food
 
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