中国畜牧兽医 ›› 2026, Vol. 53 ›› Issue (2): 659-670.doi: 10.16431/j.cnki.1671-7236.2026.02.014

• 营养与饲料 • 上一篇    下一篇

LPS对麻黄鸡生长性能、血清生化及肠道健康的影响

张之盈1(), 胡晓迪1, 彭苏1, 张兴月1, 佘沛宁1, 黄小洁2, 石达友1()   

  1. 1.华南农业大学兽医学院,广州 510642
    2.广西农业职业技术大学,南宁 530007
  • 收稿日期:2025-07-15 出版日期:2026-02-05 发布日期:2026-01-27
  • 通讯作者: 石达友 E-mail:2549215237@qq.com;shidayou@scau.edu.cn
  • 作者简介:张之盈,E-mail: 2549215237@qq.com
  • 基金资助:
    国家自然科学基金(32573415);“十四五”国家重点研发计划(2023YFD1800603);广西农业职业技术大学科研项目(XKJ2425)

Effects of LPS on the Growth Performance, Serum Biochemistry and Intestinal Health of Mahuang Chickens

ZHANG Zhiying1(), HU Xiaodi1, PENG Su1, ZHANG Xingyue1, SHE Peining1, HUANG Xiaojie2, SHI Dayou1()   

  1. 1.College of Veterinary Medicine,South China Agricultural University,Guangzhou 510642,China
    2.Guangxi Vocational University of Agriculture,Nanning 530007,China
  • Received:2025-07-15 Online:2026-02-05 Published:2026-01-27
  • Contact: SHI Dayou E-mail:2549215237@qq.com;shidayou@scau.edu.cn

摘要:

目的 探讨腹腔注射脂多糖(LPS)诱导麻黄鸡炎症模型的最佳剂量。 方法 选取120只1日龄(39.11 g±3.13 g)雄性麻黄鸡,随机分为4组,每组6个重复,每个重复5只鸡,试验期21 d。对照组(CON)麻黄鸡在15、17、19和21日龄时腹腔注射生理盐水,试验组(LL、LM和LH)分别腹腔注射0.25、0.5和1 mg/kg LPS。于15和21 d进行采血并屠宰,计算生长性能指标和免疫器官指数,观察空肠形态,测定血清生化指标、皮质酮含量、炎症因子水平、抗氧化指标及相关基因表达量。 结果 15 d时,与CON组相比,各LPS处理组麻黄鸡终末体重和平均日增重均无显著变化(P>0.05);LH组麻黄鸡空肠绒毛高度(VH)和绒隐比(V/C)均显著下降(P<0.05);LM和LH组麻黄鸡空肠闭锁蛋白(Occludin)和核因子-κB(NF-κB)表达均显著下调(P<0.05);LH组麻黄鸡血清皮质酮含量显著升高(P<0.05);LL、LM和LH组麻黄鸡血清甘油三酯(TG)含量均显著降低(P<0.05);LH组麻黄鸡血清细胞炎症因子白细胞介素-6(IL-6)含量显著升高(P<0.05);LH组麻黄鸡血清总超氧化物歧化酶(T-SOD)活性显著降低(P<0.05),丙二醛(MDA)含量显著升高(P<0.05)。21 d时,与CON组相比,LM和LH组麻黄鸡脾脏指数和胸腺指数均有所升高(P>0.05);LH组麻黄鸡空肠隐窝深度(CD)极显著升高(P<0.01),V/C显著降低(P<0.05);LH组麻黄鸡空肠闭合蛋白1(Claudin-1)表达极显著下调(P<0.01),IL-1β、肿瘤坏死因子-α(TNF-α)和NF-κB表达均极显著上调(P<0.01);各LPS组T-SOD活性均显著降低(P<0.05)。 结论 LPS注射可显著影响麻黄鸡免疫器官发育、肠道形态、炎症因子表达及抗氧化功能,成功诱导炎症应激。综合各项指标,1.0 mg/kg LPS为构建麻黄鸡炎症模型的最佳剂量。

关键词: 脂多糖(LPS); 麻黄鸡; 生长性能; 血清生化; 器官指数; 肠道屏障

Abstract:

Objective This study aimed to investigate the optimal dosage of lipopolysaccharide (LPS) for establishing an inflammatory model in Mahuang chickens via intraperitoneal injection. Method A total of 120 one-day-old male Mahuang chickens (39.11 g ± 3.13 g) were randomly assigned to 4 groups with 6 replicates per group and 5 chickens per replicate. The trial lasted 21 days. The control group (CON) received intraperitoneal injections of normal saline at 15, 17, 19, and 21 days of age, while the treatment groups (LL, LM, and LH) received LPS at 0.25, 0.5, and 1 mg/kg body weight, respectively. Blood collection and slaughter were performed on days 15 and 21 to calculate growth performance and immune organ indices, serum biochemical parameters, corticosterone, inflammatory cytokines, antioxidant indicators, and related gene expression. Result On day 15, compared with CON group, the final body weight and average daily gain of Mahuang chickens in all LPS-treated groups showed no significant changes (P>0.05). The jejunal villus height (VH) and villus-to-crypt ratio (V/C) of Mahuang chickens in LH group decreased significantly (P<0.05). The expression of Occludin and nuclear factor-κB (NF-κB) in the jejunum of Mahuang chickens in LM and LH groups was significantly down-regulated (P<0.05). The serum corticosterone content of Mahuang chickens in LH group increased (P<0.05). The serum triglyceride (TG) content of Mahuang chickens in LL, LM, and LH groups decreased significantly (P<0.05). The serum interleukin-6 (IL-6) content of Mahuang chickens in LH group increased significantly (P<0.05). The serum total superoxide dismutase (T-SOD) activity of Mahuang chickens in LH group decreased significantly (P<0.05), while the malondialdehyde (MDA) content increased significantly (P<0.05).On day 21, compared with CON group, the spleen index and thymus index of Mahuang chickens in LM and LH groups showed an increasing trend (P>0.05). The jejunal crypt depth (CD) of Mahuang chickens in LH group increased extremely significantly (P<0.01), while the V/C decreased significantly (P<0.05). The expression of Claudin-1 in the jejunum of Mahuang chickens in LH group was down-regulated extremely significantly (P<0.01), while the expression of IL-1β, tumor necrosis factor-α (TNF-α), and nuclear NF-κB was up-regulated extremely significantly (P<0.01). The T-SOD activity of Mahuang chickens in all LPS-treated groups decreased significantly (P<0.05). Conclusion LPS injection significantly affected immune organ development, intestinal morphology, inflammatory cytokine expression, and antioxidant function in Mahuang chickens, successfully inducing inflammatory stress. Considering all indicators, 1.0 mg/kg LPS was the optimal dose for establishing an inflammatory model in Mahuang chickens.

Key words: lipopolysaccharide (LPS); Mahuang chickens; growth performance; serum biochemistry; organ index; intestinal barrier

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