畜牧兽医学报 ›› 2016, Vol. 47 ›› Issue (3): 581-586.doi: 10.11843/j.issn.0366-6964.2016.03.022

• 基础兽医 • 上一篇    下一篇

仔猪回肠绒毛M细胞的形态、分布及其与猪流行性腹泻病毒感染的关系

李任峰1,2,4 ,田香勤5,乔松林2*,郭军庆2,周恩民4,张改平3*   

  1. (1.河南科技学院动物科学学院,新乡 453003;2.农业部动物免疫学重点实验室,河南省农业科学院动物免疫学重点实验室,郑州 450002;3.河南农业大学牧医工程学院,郑州 450002;4.西北农林科技大学动物医学院,杨凌 712100;5.新乡医学院河南省高等学校组织再生重点开放实验室,新乡 453003)
  • 收稿日期:2015-08-17 出版日期:2016-03-23 发布日期:2016-03-21
  • 通讯作者: 张改平,研究员,E-mail:zhanggaiping2003@163.com;乔松林,研究员,E-mail:cdj565@gmail.com
  • 作者简介:李任峰(1978-),男,河南驻马店人,博士生,主要从事动物病原学与免疫学研究,E-mail:lirenfeng@sina.com
  • 基金资助:

    国家生猪产业技术体系(CARS-36);河南省生猪产业技术体系创新团队(S2012-06)

Morphological and Distribution Characteristics of Villous M Cells in the Ileum of Newborn Piglets and the Association with PEDV Infection

LI Ren-feng1,2,4,TIAN Xiang-qin5,QIAO Song-lin2* ,GUO Jun-qing2,ZHOU En-min4,ZHANG Gai-ping3*   

  1. (1.College of Veterinary Medicine,Henan Institute of Science and Technology,Xinxiang 453003,China;2.Key Laboratory of Animal Immunology of the Ministry of Agriculture,Key Laboratory of Animal Immunology,Henan Academy of Agricultural Sciences,Zhengzhou 450002,China;3.College of Animal Science and Veterinary Medicine,Henan Agricultural University,Zhengzhou 450002,China; 4.College of Veterinary Medicine,Northwest A & F University,Yangling 712100,China;5.Key Open Laboratory for Tissue Regeneration of Henan Universities,Xinxiang Medical University,Xinxiang 453003,China)
  • Received:2015-08-17 Online:2016-03-23 Published:2016-03-21

摘要:

为了探索新生仔猪回肠绒毛上皮是否存在M细胞以及自然感染条件下猪流行性腹泻病毒(PEDV)与回肠绒毛M细胞之间的关系。采用免疫荧光、免疫组化及形态学方法研究了正常情况下仔猪回肠绒毛M细胞的分布特点和形态学特征,以及自然感染条件下PEDV与仔猪回肠绒毛M细胞之间的关系。免疫荧光结果证实正常仔猪回肠绒毛上皮存在M细胞,沿隐窝至绒毛顶端上皮方向,M细胞的数量逐渐减少。电镜下,正常仔猪的回肠绒毛M细胞具有典型的M细胞特征。自然感染PEDV的仔猪回肠绒毛M细胞病变明显,在其顶膜、细胞质、细胞核及其上皮下层均观察到成簇的PEDV颗粒,而相邻的其他上皮细胞病变不明显,且细胞内没有观察到病毒粒子。以上研究结果表明,新生仔猪回肠绒毛上皮存在M细胞,在绒毛的不同位置其分布比例存在差异。仔猪回肠绒毛M细胞可能是PEDV入侵肠道的重要通道。

关键词: 肠绒毛M细胞, 新生仔猪, 猪流行性腹泻病毒

Abstract:

The aim of this study was to identify the presence of villous M cells in the ileum of newborn piglets and determine the distribution pattern,morphological characteristics and the association with PEDV infection by immunofluorescence assay(IFA),immunohistochemistry(IHC) and morphological methods.IFA showed a gradually decreased density of villous M cells from lower crypt epithelium to upper villous epithelium.The villous M cells showed typical morphological characteristics of M cells by electron microscope.After infected with PEDV,villous M cells in the ileum exhibited pathological changes obviously.The virus particles of PEDV were observed on the apical membrane,in the cytoplasm,around the nucleus and subepithelial of villous M cells by immunohistochemical staining of PEDV S protein,which were not observed in its adjacent epithelial cells.This study demonstrated the presence of villous M cells in the ileum of newborn piglets and determine the distribution pattern,morphological characteristics and the association with PEDV infection,suggesting the villous M cells in the ileum may be an important entry for PEDV invasion.

Key words: intestinal villous M cells, newborn piglets, porcine epidemic diarrhea virus

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