Department of Food Science and Human Nutrition, Clemson University, Clemson, SC, USA.
Poult Sci. 2011 Oct;90(10):2348-54. doi: 10.3382/ps.2011-01426.
The objective of the present study was to compare carnosine levels in tissues of broilers under stress conditions with those of broilers under nonstress conditions. Blood heterophil:lymphocyte ratio and corticosterone levels were measured as indicators of the level of stress. Corticosterone levels of stressed broilers (24,358.67 pg/mL) were 10-fold higher (P = 0.002) than those of nonstressed broilers (2,275.46 pg/mL). However, no difference (P = 0.29) was found in heterophil:lymphocyte ratio of nonstressed (0.29) and stressed (0.31) birds. Carnosine content in breast of stressed birds (17.39 mg/g) was 10 times higher (P = 0.005) than that of nonstressed birds (1.85 mg/g). Carnosine content in thigh of stressed birds (21.25 mg/g) was approximately 2-fold higher (P = 0.001) than that of nonstressed birds (11.10 mg/g). Carnosine content in brain of stressed birds did not differ (P = 0.82) from that of nonstressed birds. Based on the present study, muscle carnosine recovery levels increase during short-term stress, whereas levels in the brain are not affected.
本研究的目的是比较应激条件下和非应激条件下肉鸡组织中的肌肽水平。血液异嗜细胞：淋巴细胞比值和皮质酮水平被用作应激水平的指标。应激组肉鸡的皮质酮水平（24,358.67 pg/mL）是未应激组的 10 倍（P = 0.002）（2,275.46 pg/mL）。然而，未应激组（0.29）和应激组（0.31）鸟类的异嗜细胞：淋巴细胞比值没有差异（P = 0.29）。应激组肉鸡胸肌中的肌肽含量（17.39 mg/g）是未应激组的 10 倍（P = 0.005）（1.85 mg/g）。应激组肉鸡大腿肌中的肌肽含量（21.25 mg/g）约为未应激组的 2 倍（P = 0.001）（11.10 mg/g）。应激组和未应激组肉鸡脑中的肌肽含量没有差异（P = 0.82）。根据本研究，在短期应激期间，肌肉肌肽的恢复水平增加，而大脑中的水平不受影响。
