Journal
BRITISH JOURNAL OF NUTRITION
Volume 117, Issue 8, Pages 1086-1094Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0007114517001040
Keywords
Kinetics; Organic zinc absorption; Metallothionein; Small intestine; Broiler chickens
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Funding
- Key International Cooperation Program of the National Natural Science Foundation of China (Beijing, People's Republic of China) [31110103916]
- Research Program of the Key Laboratory of Animal Nutrition (Beijing, PR China) [2004DA125184G1108]
- Agricultural Science and Technology Innovation Program (Beijing, PR China) [ASTIP-IAS08]
- China Agriculture Research System (Beijing, PR China) [CARS-42]
- Program of the National Natural Science Foundation of China (Beijing, PR China) [30871798]
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In Expt 1, a Zn-unsupplemented basal diet (control) and the basal diet supplemented with one of four different Zn sources, including ZnSO4, Zn-amino acid chelate with a weak chelation strength (Zn-AA W), Zn-protein chelate with a moderate chelation strength (Zn-Pro M) and Zn-protein chelate with a strong chelation strength (Zn-Pro S) were fed to broiler chickens from days 14 to 28. On day 28, Zn content in plasma from the hepatic portal vein increased (P<0.05) in the following order: control0.05) and Zn-AA W(P<0.04) were higher than those for ZnSO4. These findings indicate that organic Zn absorption (especially Zn-Pro S) in intact living broilers was more effective than that of inorganic Zn; organic Zn absorption in the ligated duodenal segment was a saturable carrier-mediated process similar to that of ZnSO4. Moreover, except for MT, there might be other Zn transporters involved in Zn absorption that are affected by different Zn sources.
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