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Assessment of tissue distribution and concentration of β-cryptoxanthin in response to varying amounts of dietary β-cryptoxanthin in the Mongolian gerbil.
Br J Nutr
March 2014
Western Human Nutrition Research Center, USDA-ARS-PWA, 430 West Health Sciences Drive, Davis, CA 95616, USA.
There is a general lack of knowledge regarding the absorption and tissue storage of the provitamin A carotenoid β-cryptoxanthin. The present study investigated the whole-body tissue distribution of β-cryptoxanthin in an appropriate small animal model, the Mongolian gerbil (Meriones unguiculatus), for human provitamin A carotenoid metabolism. After 5 d of carotenoid depletion, five gerbils were euthanised for baseline measurements.
View Article and Find Full Text PDFImmune status is more affected by age than by carotenoid depletion-repletion in healthy human subjects.
Br J Nutr
December 2012
Clermont Université, Université d'Auvergne, EA 4233, LB2MN, CRNH Auvergne, BP 10448, F-63000 Clermont-Ferrand, France.
Prospective studies have indicated an age-related impairment of the immune response. Carotenoids have been hypothesised to enhance immune cell function. The aim of the present study was to describe the age-related effects and the impact of in vivo dietary carotenoid depletion and repletion on specific and non-specific immunity.
View Article and Find Full Text PDFβ-Cryptoxanthin biofortified maize (Zea mays) increases β-cryptoxanthin concentration and enhances the color of chicken egg yolk.
Poult Sci
February 2012
University of Wisconsin, Madison, WI 53706, USA.
The laying hen has a natural ability to deposit carotenoids into its egg yolks, especially the xanthophyll carotenoid lutein that is used commercially as an egg colorant. Can this ability to deposit carotenoids be used to enrich egg yolk provitamin A value? After a 10-d carotenoid depletion period in hens (n = 24), the effects of a 20-d intervention with high-β-cryptoxanthin, high-β-carotene, or typical yellow maize on color and carotenoid profile were compared with the effects of a white maize diet (n = 6/treatment). Eggs were collected every other day and yolks were analyzed by using a portable colorimeter to define the color space and by using an HPLC to determine the carotenoid profile.
View Article and Find Full Text PDFThe effects of dietary carotenoid intake on carotenoid accumulation in the retina of a wild bird, the house finch (Carpodacus mexicanus).
Arch Biochem Biophys
December 2010
School of Life Sciences, Arizona State University, Tempe, AZ 85287-4501, USA.
Carotenoid pigments accumulate in the retinas of many animals, including humans, where they play an important role in visual health and performance. Recently, birds have emerged as a model system for studying the mechanisms and functions of carotenoid accumulation in the retina. However, these studies have been limited to a small number of domesticated species, and the effects of dietary carotenoid access on retinal carotenoid accumulation have not been investigated in any wild animal species.
View Article and Find Full Text PDFPlasma responses in human subjects after ingestions of multiple doses of natural alpha-cryptoxanthin: a pilot study.
Br J Nutr
August 2006
Institute of Food Chemistry, University of Hohenheim, Garbenstrasse 28, 70593 Stuttgart, Germany.
Xanthophylls have attracted a lot of interest since their health benefits were documented. Unfortunately, studying their intestinal absorption is often affected by high baseline levels present in the fasting plasma. As alpha-cryptoxanthin is rarely found in the traditional European diet, its concentration in human plasma is extremely low.
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