Issue 3, 2019

Water-dispersible astaxanthin-rich nanopowder: preparation, oral safety and antioxidant activity in vivo

Abstract

In this research, astaxanthin-rich nanopowder was prepared by nanoencapsulation and freeze-drying techniques with enhanced bioavailability and antioxidant activities. The nanopowder showed a maximum solubility of 230 mg mL−1 with an astaxanthin content as high as 2.9%. Compared with free astaxanthin, the astaxanthin-loaded nanopowder exhibited a more efficient antioxidant effect: an oral dose of 0.9 mg per kg BW significantly reduced the malondialdehyde and protein carbonyl contents, and increased the glutathione content as well as the superoxide dismutase activities in alcohol-induced acute hepatic injured mice, and maintained these oxidative stress indicators at a normal level for a longer period when treated with nanoencapsulated-astaxanthin than free astaxanthin. Simulated gastrointestinal tract studies demonstrated that the nanopowder with pH and DNase I-dependent dissociation properties delivered astaxanthin efficiently to the small intestine. Astaxanthin-rich nanopowder with a dose as high as 2.4 mg per kg BW (equivalent to astaxanthin) showed no chronic toxicity to mice in terms of hematology and pathological histology, indicating its impressive biocompatibility for biomedical applications. Pharmacokinetics and relative bioavailability (207%) of the nanopowder further proved that DNA/chitosan nanocarriers significantly improved the delivery efficiency of astaxanthin. With enhanced bioavailability and antioxidant activities, this novel type of astaxanthin-loaded nanopowder is expected to find broad application in the food and drug industry.

Graphical abstract: Water-dispersible astaxanthin-rich nanopowder: preparation, oral safety and antioxidant activity in vivo

Supplementary files

Article information

Article type
Paper
Submitted
09 Aug 2018
Accepted
21 Jan 2019
First published
26 Jan 2019

Food Funct., 2019,10, 1386-1397

Water-dispersible astaxanthin-rich nanopowder: preparation, oral safety and antioxidant activity in vivo

L. Guan, J. Liu, H. Yu, H. Tian, G. Wu, B. Liu, P. Dong, J. Li and X. Liang, Food Funct., 2019, 10, 1386 DOI: 10.1039/C8FO01593G

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