畜牧兽医学报 ›› 2025, Vol. 56 ›› Issue (3): 1441-1452.doi: 10.11843/j.issn.0366-6964.2025.03.042

• 临床兽医 • 上一篇    下一篇

基于转录组学探究日粮添加酵母β-葡聚糖对新城疫疫苗免疫鸡肠道免疫的影响

李常营1(), 李俊2,3, 李锡锋3, 毕师诚3,4, 曹立亭3,4,*()   

  1. 1. 西南大学动物科学技术学院,重庆 402460
    2. 宜宾市翠屏区动物防疫检疫中心,宜宾 644000
    3. 西南大学动物医学院,重庆 402460
    4. 西南大学中兽医药研究所,重庆 402460
  • 收稿日期:2024-06-25 出版日期:2025-03-23 发布日期:2025-04-02
  • 通讯作者: 曹立亭 E-mail:licy1983@163.com;caoliting@swu.edu.cn
  • 作者简介:李常营(1983-),男,山东滕州人,讲师,博士,主要从事动物营养与疾病防控研究,E-mail: licy1983@163.com,Tel:023-46751588
  • 基金资助:
    重庆市技术创新与应用发展专项资助项目(cstc2019jsccx-lyjsBX0003;cstc2021jscx-lyjsAX0008)

Effect of Dietary Yeast β-glucan Supplementation on Intestinal Immune Function in Chickens Immunized against Newcastle Disease Vaccine based on Transcriptomic

LI Changying1(), LI Jun2,3, LI Xifeng3, BI Shicheng3,4, CAO Liting3,4,*()   

  1. 1. College of Animal Science and Technology, Southwest University, Chongqing 402460, China
    2. Cuiping Animal Epidemic Prevention and Quarantine Center of Yibin, Yibin 644000, China
    3. College of Veterinary Medicine, Southwest University, Chongqing 402460, China
    4. Institute of Traditional Chinese Veterinary Medicine, Southwest University, Chongqing 402460, China
  • Received:2024-06-25 Online:2025-03-23 Published:2025-04-02
  • Contact: CAO Liting E-mail:licy1983@163.com;caoliting@swu.edu.cn

摘要:

旨在探讨基础日粮中添加酵母β-葡聚糖(G70)对新城疫疫苗免疫鸡肠道免疫功能的影响。试验选取16只1日龄健康乌骨鸡随机分为2个组,对照组(Vaccine)和G70组(G70+Vaccine),G70组在饲喂基础日粮的基础上添加1 g·kg-1的G70,分别于14、28日龄进行新城疫疫苗首次免疫和加强免疫。35日龄时,采集鸡的空肠组织,测定空肠黏膜IgA+细胞数量,空肠CD4+CD8+双阳性T细胞占比与空肠免疫相关基因mRNA表达水平,随后进行转录组学测序,并对差异表达基因进行GO功能和KEGG通路富集分析。结果表明,与对照组相比,饲料添加G70显著提高空肠黏膜内IgA+细胞的数量(P < 0.05),空肠CD4+CD8+双阳性T细胞占比显著上升(P < 0.05),GATA-3、MHC-Ⅰ、MHC-Ⅱ、CCR7和IFN-γ mRNA表达水平显著上调(P < 0.05);转录组学研究表明,添加G70后空肠组织差异表达基因有559个,其中54个基因上调和505个基因下调,基因本体(GO)富集分析揭示差异表达基因多数被注释到胺代谢和分解、蛋白质合成、刺激生长因子(TGF-β)和调节酶活性等相关的GO条目上;KEGG信号通路分析显示差异表达基因主要富集在与核糖体、MAPK、细胞黏附和局部黏附等与细胞合成和代谢相关的信号通路。上述结果提示,饲粮中添加酵母β-葡聚糖(G70)可增加新城疫免疫鸡空肠中IgA+细胞的数量,提高空肠CD4+CD8+双阳性T细胞占比,上调空肠中免疫相关基因的表达,其机制可能是通过调节IL-17RD、TGF-βTMEM158等免疫相关基因的表达,影响IL-17受体、TGF-β和MAPK信号通路提高鸡的肠道免疫功能。

关键词: 酵母β-葡聚糖, 新城疫疫苗, 肠道免疫, 转录组学

Abstract:

The aim of this study is to investigate the effect of adding yeast β-glucan (G70) to the diet on intestinal immune function in chickens immunized Newcastle disease (ND) vaccine. Sixteen 1-day-old healthy black-bone chickens were randomly divided into 2 groups, the Vaccine group and the G70+Vaccine group, and in the G70+Vaccine group, yeast β-glucan was added at 1 g·kg-1 in the basal diet. At 14 and 28 days of age, ND vaccine was administered for the 1st immunization and booster immunization. At 35 days of age, jejunum tissue was collected to determine the number of IgA+cells, the proportions of CD4+CD8+double-positive T cells, and the mRNA expression levels of immune-related genes in jejunum, then transcriptome sequencing was performed, and the differentially expressed genes were analyzed by GO function and KEGG pathway. The results showed that, compared with the Vaccine group, dietary G70 significantly increased the number of IgA+cells (P < 0.05) and the proportions of CD4+CD8+double-positive T cells in the jejunum (P < 0.05), and the mRNA expression levels of GATA-3, MHC-Ⅰ, MHC-Ⅱ, CCR7 and IFN-γ were significantly up-regulated (P < 0.05). RNA-seq showed that there were 559 differentially expressed genes in G70+Vaccine group, of which 54 were up-regulated and 505 were down-regulated, the GO analysis revealed that most of the differentially expressed genes were annotated to the GO entries related to amine metabolism and catabolism, protein synthesis, stimulation of TGF-β, and regulation of enzyme activities. KEGG signaling pathway analysis revealed that the differentially expressed genes were mainly enriched in signaling pathways related to cell synthesis and metabolism, such as ribosomes, MAPK, cell adhesion and local adhesion. In summary, the addition of yeast β-glucan (G70) to the diet increased the number of IgA+cells, promoted the proportions of CD4+CD8+double-positive T cells, and up-regulated the expression of immune-related genes in jejunum. The possible mechanism of improving chicken's intestinal immune function might be affecting the IL-17 receptor, TGF-β and MAPK signaling pathways by regulating the expression of immune-related genes such as IL-17RD, TGF-β and TMEM158.

Key words: yeast β-glucan, Newcastle disease vaccine, intestinal immune function, transcriptomics

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