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Metabolism of cryptoxanthin in freshwater fish*

Published online by Cambridge University Press:  09 March 2007

Umesh C. Goswami
Umesh C. Goswami
Affiliation:
Department of Zoology, University of Gauhati, Gauhati-781014, Assam, India
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Abstract

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1. In search of other provitamins A, the metabolism of cryptoxanthin was studied in several species of freshwater fish, i.e. Chunna gachua, Labeo boga (retinol-rich) and Heteropneustes fossilis (dehydroretinol-rich). The fish were either allowed to starve for 20–25 d to make their intestines free from carotenoids and vitamin A or kept on a vitamin-A-deficient diet for 140–150 d to deplete the initial reserve of vitamin A in the livers.

2. Retinol-rich freshwater fish such as C. gachua and L. boga converted cryptoxanthin into retinol and no 3-dehydroretinol or 3-hydroxyretinol could be isolated from those fish that received cryptoxanthin.

3. 3-Hydroxyretinol and 3-dehydroretinol were isolated from the vitamin-A-deficient H. fossilis, a 3-dehydro-retinol-rich freshwater siluroid, after the administration of cryptoxanthin.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 52 , Issue 3 , November 1984 , pp. 575 - 581
Copyright
Copyright © The Nutrition Society 1984

References

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