TY - JOUR
T1 - β-Carotene during the suckling period is absorbed intact and induces retinoic acid dependent responses similar to preformed vitamin A in intestine and liver, but not adipose tissue of young rats
AU - Mušinović, Hana
AU - Bonet, M. Luisa
AU - Granados, Nuria
AU - Amengual, Jaume
AU - von Lintig, Johannes
AU - Ribot, Joan
AU - Palou, Andreu
N1 - Publisher Copyright:
© 2014 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
PY - 2014/11/1
Y1 - 2014/11/1
N2 - Scope: We studied β-carotene (BC) absorption and metabolism and compared BC and retinyl palmitate (RE) for their impact on white adipose tissue (WAT) development in suckling rats. Methods and results: Rat pups received daily orally from days 1-20 of life either the vehicle or vitamin A (approx. ×3 that ingested daily from maternal milk) in the form of BC or RE. Intact BC was found in serum and liver of BC-supplemented rats. Both BC and RE supplementation increased retinoic acid mediated transcriptional responses in intestine (on Isx and Bco1) and the liver (on Cyp26a1 and Cpt1a). In contrast, responses in WAT were dependent on the vitamin A source: WAT of BC-supplemented rats, like WAT of control rats, was enriched in larger adipocytes with increased adipogenic markers (peroxisome proliferator-activated receptor γ and downstream genes) and reduced markers of proliferative status (proliferating cell nuclear antigen) compared to WAT of RE-supplemented rats. Conclusion: BC is partly absorbed intact by suckling rats, which resembles the situation in humans and suggests that suckling rats may be an appropriate animal model to study BC uptake, metabolism and biological activity, particularly in infants. Vitamin A supplementation with BC or RE in early life differentially affects WAT and may thus entail different outcomes regarding adiposity programming.
AB - Scope: We studied β-carotene (BC) absorption and metabolism and compared BC and retinyl palmitate (RE) for their impact on white adipose tissue (WAT) development in suckling rats. Methods and results: Rat pups received daily orally from days 1-20 of life either the vehicle or vitamin A (approx. ×3 that ingested daily from maternal milk) in the form of BC or RE. Intact BC was found in serum and liver of BC-supplemented rats. Both BC and RE supplementation increased retinoic acid mediated transcriptional responses in intestine (on Isx and Bco1) and the liver (on Cyp26a1 and Cpt1a). In contrast, responses in WAT were dependent on the vitamin A source: WAT of BC-supplemented rats, like WAT of control rats, was enriched in larger adipocytes with increased adipogenic markers (peroxisome proliferator-activated receptor γ and downstream genes) and reduced markers of proliferative status (proliferating cell nuclear antigen) compared to WAT of RE-supplemented rats. Conclusion: BC is partly absorbed intact by suckling rats, which resembles the situation in humans and suggests that suckling rats may be an appropriate animal model to study BC uptake, metabolism and biological activity, particularly in infants. Vitamin A supplementation with BC or RE in early life differentially affects WAT and may thus entail different outcomes regarding adiposity programming.
KW - Adiposity
KW - Animal models
KW - Early-life nutrition
KW - PPAR
KW - Vitamin A
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U2 - 10.1002/mnfr.201400457
DO - 10.1002/mnfr.201400457
M3 - Article
C2 - 25164272
AN - SCOPUS:84922702114
SN - 1613-4125
VL - 58
SP - 2157
EP - 2165
JO - Molecular Nutrition and Food Research
JF - Molecular Nutrition and Food Research
IS - 11
ER -