Journal
ARCHIVES OF ANIMAL NUTRITION
Volume 71, Issue 5, Pages 362-372Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/1745039X.2017.1355129
Keywords
Antioxidant properties; blood composition; broilers; epigallocatechin gallate; feed supplements; heat stress; performance
Categories
Funding
- National Natural Science Foundation of China [31474117]
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This study investigated the effects of epigallocatechin gallate (EGCG) on the growth performance and antioxidant capacity of 35-d-old broilers exposed to heat stress. Broilers, 14 d of age, were divided into four groups with six replicates per group (eight chickens/replicate). Thermoneutral group (Group TN) was fed the basal diet and maintained at 28 degrees C for 24h/d. The heat-stressed groups were housed at 35 degrees C for 12h/d and 28 degrees C for 12h/d and fed the basal diet supplemented with EGCG at 0, 300 and 600mg/kg diet (Groups HS0, HS 300 and HS600, respectively). Compared with Group TN, heat-stressed groups showed significantly reduced gain, feed intake and serum total protein and glucose levels; inhibited serum alkaline phosphatase activities; and increased serum levels of uric acid, cholesterol and triglycerides and the activity of serum creatine kinase, lactate dehydrogenase and aspartate aminotransferase (p<0.05). Compared with Group HS0, Group HS600 exhibited an increased gain and feed intake; and normalised blood parameters and enzyme activities. Compared with Group TN, the expression of antioxidant-related liver proteins was decreased in Group HS0 and increased in Groups HS300 and HS600 (p<0.05). The results suggest that EGCG can improve the growth performance and alleviate the oxidant damage by modulating the antioxidant properties of broilers.
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