Molecular Composition, Digestion and Absorption Characteristics of Astaxanthin in Antarctic Krill Oil

ZHOU Qingxin; HUANG Ziqian; GU Caixia; ZHANG Zhixuan; LI Lu; ZHOU Jinruo; LI Yuhuan

doi:10.13386/j.issn1002-0306.2020090089

Volume 42 Issue 12

Jun. 2021

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Science and Technology of Food Industry > 2021 > 42(12): 347-353. > DOI: 10.13386/j.issn1002-0306.2020090089

ZHOU Qingxin, HUANG Ziqian, GU Caixia, et al. Molecular Composition, Digestion and Absorption Characteristics of Astaxanthin in Antarctic Krill Oil[J]. Science and Technology of Food Industry, 2021, 42(12): 347−353. (in Chinese with English abstract). doi: 10.13386/ j.issn1002-0306.2020090089.

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Molecular Composition, Digestion and Absorption Characteristics of Astaxanthin in Antarctic Krill Oil

ZHOU Qingxin^{1, 2, 3,},
HUANG Ziqian⁴,
GU Caixia^{1, 2, 3},
ZHANG Zhixuan¹,
LI Lu¹,
ZHOU Jinruo^{2, 3},
LI Yuhuan^{1, 2, 3}

1.
College of Marine Engineering, Rizhao Polytechnic, Rizhao 276826, China
2.
Rizhao Key Laboratory of Efficient Utilization of Marine Food Resources, Rizhao 276826, China
3.
Shandong Engineering and Technology Research Center for Marine Crustacean Resources Comprehensive Utilization, Rizhao 276826, China
4.
College of Food Science and Engineering, Northwest A&F University, Yangling 712100, China

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Received Date: September 09, 2020
Available Online: April 11, 2021

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Abstract

Abstract

The extraction of Antarctic krill oil enrich astaxanthins using n-hexane-ethanol solvent systems was studied, taking the total astaxanthin content, phospholipid content and yield of Antarctic krill oil as the investigation indexes. Meanwhile, the molecular species composition of astaxanthins in Antarctic krill oil which extracted under the optimized conditions were characterized and analyzed. Then the digestion process and bioaccessibility of astaxanthins in Antarctic krill oil were investigated by single-dose oral gavage with different doses of Antarctic krill oil, using ICR mice as model animals. Furthermore, the bioacceptability of astaxanthin from Antarctic krill oil and Haematococcus pluvialis were compared. The results showed that the 60%(V/V) n-hexane-ethanol solution was selected as the best solvent to extract Antarctic krill oil enrich astaxanthins. The astaxanthins in krill oil were mainly present as fatty acid esters, the relative percentages of astaxanthin diesters, monoesters, and free astaxanthin were 73.5%, 24.8%, and 1.62%. The astaxanthin diesters were hydrolyzed to monoesters or free from in the gastrointestinal tract. After 24 hours of gavage, the bioaccessibility of astaxanthin in low, middle and high dose groups was not significant, and the bioaccessibility of astaxanthin in Antarctic krill oil was about 74%. In addition, the bioaccessibility of astaxanthin in Antarctic krill oil was about 1.25 times of that in Haematococcus pluvialis oil. These results could provide a scientific basis for the rational production and the evaluation of dietary nutritional of Antarctic krill oil.
- Antarctic krill oil,
- astaxanthin,
- digestion,
- bioaccessibility

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References (30)

References

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