caa a22 4500 388063505 CHVBK 20180307125127.0 cr unu---uuuuu 161130e199801 xx s 000 0 eng 10.1079/BJN19980012 doi S0007114598000130 pii (NATIONALLICENCE)cambridge-10.1079/BJN19980012 Further studies on carry-over effects of dietary crude protein and triiodothyronine (T3) in broiler chickens [Elektronische Daten] Indian River male broiler chickens growing from 7 to 28 d of age were fed on diets containing either 120 or 210 g crude protein and 0 or 1 mg triiodothyronine (T3)/kg diet to study in vitro lipogenesis (IVL). In addition, a carry-over period (180 g crude protein/kg diet from 28 to 40 d of age) was used to test the persistence of prior treatment effects. The higher protein level increased, but T3 decreased (P < 0.01) growth and feed consumption at 28 d of age. The lower protein level increased (P < 0.05) and T3 decreased IVL in 28-d-old chickens. These effects were only sustained for 6 d following the switch to a common diet at 28 d. IVL at 40 d of age was not affected by either crude protein or T3 fed during the 7-28 d period. The higher protein level increased plasma insulin-like growth factor-1 during the period from 7 to 28 d; however, this effect lasted for only 6 d following the switch to a common diet. Plasma growth hormone (GH) at 28 d of age was inversely related to dietary protein level. Changing to a common level of crude protein did not change plasma GH values at 12 d, indicating that the nutritional state of the young chicken may affect GH at a later period of life. Metabolic changes noted in this study were rapid and maintained for a short period of time following the feeding of a common diet. Lipogenesis: Dietary protein: Triiodothyronine Copyright © The Nutrition Society 1998 Lipogenesis nationallicence Dietary protein nationallicence Triiodothyronine nationallicence Rosebrough R. W. Growth Biology Laboratory, Livestock and Poultry Science Institute, United States Department of Agriculture-Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA McMurtry J. P. Growth Biology Laboratory, Livestock and Poultry Science Institute, United States Department of Agriculture-Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA Vasilatos-Younken R. Department of Poultry Science, The Pennsylvania State University, University Park, PA 16802, USA British Journal of Nutrition Cambridge University Press 79/1(1998-01), 89-95 0007-1145 79:1<89 1998 79 BJN https://doi.org/10.1079/BJN19980012 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1079/BJN19980012 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rosebrough R. W. Growth Biology Laboratory, Livestock and Poultry Science Institute, United States Department of Agriculture-Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA NATIONALLICENCE 700 1- McMurtry J. P. Growth Biology Laboratory, Livestock and Poultry Science Institute, United States Department of Agriculture-Agricultural Research Service, Beltsville Agricultural Research Center, Beltsville, MD 20705, USA NATIONALLICENCE 700 1- Vasilatos-Younken R. Department of Poultry Science, The Pennsylvania State University, University Park, PA 16802, USA NATIONALLICENCE 773 0- British Journal of Nutrition Cambridge University Press 79/1(1998-01), 89-95 0007-1145 79:1<89 1998 79 BJN CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge