Hu Gui-Li, Xiong Juan, Liu Yang, Yang Hong-Jun, Hu Ling-Ling, Chen Peng, Wang Xin, Liao Shuang, Lv Tuo, Liu Chun-Jie, Huang Peng, Lin Qian
Centree Bio-tech (Wuhan) Co., LTD, Wuhan, China.
Institute of Bast Fiber Crops, Chinese Academy of Agricultural Sciences, Changsha, China.
Front Physiol. 2022 Jul 19;13:892585. doi: 10.3389/fphys.2022.892585. eCollection 2022.
The aim of this experiment was to investigate the effect of soy lecithin on serum-related indicators and liver health in laying hens under the influence of high-fat diets. 180 peak laying hens at 40 weeks of age were randomly assigned to one of the four diets using a 2 × 2 factorial and fed for 5 weeks. The results showed that compared to the low-fat group, the high-fat group had lower egg production ( < 0.05) and higher average daily feed intake and feed-to-egg ratio ( < 0.05). At the 21 day, the serum levels of triglyceride (TC) and superoxide dismutase (SOD) were higher ( < 0.05), high-density lipoproteins cholesterol (HDL-C) levels were lower ( < 0.01), catalase (CAT) activity was lower ( < 0.05), TC and malondialdehyde (MDA) levels in liver were higher ( < 0.01) and SOD activity in liver was lower ( < 0.05) in layers supplemented with soy lecithin. CAT activity in serum was increased ( < 0.01) and total antioxidant capacity (T-AOC) activity in the liver was decreased ( < 0.05) after increasing the dietary fat concentration. The addition of soy lecithin and the increase in dietary fat concentration had a highly significant interaction on serum CAT activity and liver TC content in layers ( < 0.01). At the 35 day, the serum alanine aminotransferase (ALT) activity was higher ( < 0.01), serum glutathione peroxidase (GSH-Px) and CAT activity were higher ( < 0.05), and serum triglyceride (TG) content and total T-AOC capacity activity were lower ( < 0.05) in layers supplemented with soy lecithin. Increasing dietary fat concentration decreased alanine aminotransferase (ALT), aspartate aminotransferase (AST) and GSH-Px activity in serum ( < 0.05). However, it increased TG and MDA content in liver ( < 0.05), and highly decreased SOD content in liver ( < 0.01) in layers. The addition of soy lecithin and increasing dietary fat concentration had a highly significant reciprocal effect on serum ALT viability and CAT viability ( < 0.01) and liver TG and MDA content and SOD viability ( < 0.05) in layers. In conclusion, feeding high-fat diets will adversely affect the laying performance of laying hens, while long-term addition of lecithin can improve the blood lipids and liver lipids of laying hens, enhance the antioxidant capacity of the liver, and maintain liver health.
本实验旨在研究在高脂日粮影响下大豆卵磷脂对蛋鸡血清相关指标及肝脏健康的影响。选用180只40周龄的产蛋高峰期蛋鸡，采用2×2析因设计随机分为4种日粮组，饲养5周。结果表明，与低脂组相比，高脂组蛋鸡产蛋率较低（P<0.05），平均日采食量和料蛋比更高（P<0.05）。在第21天，添加大豆卵磷脂的蛋鸡血清甘油三酯（TC）和超氧化物歧化酶（SOD）水平较高（P<0.05），高密度脂蛋白胆固醇（HDL-C）水平较低（P<0.01），过氧化氢酶（CAT）活性较低（P<0.05），肝脏中TC和丙二醛（MDA）水平较高（P<0.01），肝脏SOD活性较低（P<0.05）。提高日粮脂肪浓度后，血清CAT活性升高（P<0.01），肝脏总抗氧化能力（T-AOC）活性降低（P<0.05）。大豆卵磷脂的添加与日粮脂肪浓度的增加对蛋鸡血清CAT活性和肝脏TC含量有极显著的交互作用（P<0.01）。在第35天，添加大豆卵磷脂的蛋鸡血清丙氨酸氨基转移酶（ALT）活性较高（P<0.01），血清谷胱甘肽过氧化物酶（GSH-Px）和CAT活性较高（P<0.05），血清甘油三酯（TG）含量和总T-AOC能力活性较低（P<0.05）。提高日粮脂肪浓度可降低血清中ALT、天冬氨酸氨基转移酶（AST）和GSH-Px活性（P<0.05）。然而，会增加蛋鸡肝脏中TG和MDA含量（P<0.05），并显著降低肝脏中SOD含量（P<0.01）。大豆卵磷脂的添加与日粮脂肪浓度的增加对蛋鸡血清ALT活性和CAT活性有极显著的交互作用（P<0.01），对肝脏TG和MDA含量及SOD活性有显著交互作用（P<0.05）。综上所述，饲喂高脂日粮会对蛋鸡的产蛋性能产生不利影响，而长期添加卵磷脂可改善蛋鸡的血脂和肝脏脂质，增强肝脏的抗氧化能力，维持肝脏健康。
