Journal
JOURNAL OF FUNCTIONAL FOODS
Volume 8, Issue -, Pages 234-242Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jff.2014.03.022
Keywords
Duck egg white peptides (DPs); Phosphorylation; Peptides-calcium complexes; Calcium absorption; Bone
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Funding
- Fundamental Research Funds for the Central Universities [52902-0900205118]
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The effects of desalted duck egg white peptides (DPs), phosphorylated DPs (PDPs) and DPs-calcium complexes (DPs-Ca) on calcium absorption in vivo were investigated. Ninety fast-growing male rats were divided into 10 groups and treated with different dosages of CaCO3, calcium gluconate, DPs-Ca as well as CPPs, DPs and PDPs supplemented with CaCO3. Eight-week oral administration results indicated that the high dosage PDPs+CaCO3 group was significantly higher than the high dosage DPs+CaCO3 group in calcium absorption, bone calcium content, BMD and maximum stress, but lower in ALP activity (P < 0.05). Additionally, the high dosage DPs-Ca group showed higher bone indices than the high dosage DPs+CaCO3, calcium gluconate and CaCO3 groups (P < 0.05). These results suggest that in vivo, phosphorylated DPs are more effective than DPs in improving calcium absorption and bone strength, and DPs-calcium complexes are more beneficial to bone tissues than the DPs and CaCO3 mixture. (C) 2014 Elsevier Ltd. All rights reserved.
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