Journal of Integrative Agriculture ›› 2014, Vol. 13 ›› Issue (4): 858-859.DOI: 10.1016/S2095-3119(13)60416-5

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Dramatic Changes of Matrix Metalloproteinases-7 and Lysozyme in the Ulcerative Colitis of Mice Induced by Dextran Sulfate Sodium

 KANG Jing-jing, ZHAO De-ming, TENG Ke-dao, JIAO Xi-lan, WANG Ping-li, SUN Zhe, NI Peipei, WANG Zhi-feng, ZHANG Rui, YANG Yu-rong , LIANG Hong-de   

  1. 1、Pathology Laboratory, College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou 450002, P.R.China
    2、College of Animal Medicine, China Agricultural University, Beijing 100193, P.R.China
  • 收稿日期:2012-10-16 出版日期:2014-04-01 发布日期:2014-04-16
  • 通讯作者: YANG Yu-rong, E-mail: yangyu7712@sina.com; LIANG Hong-de, Tel: +86-371-63554600, E-mail: hdliang12@163.com
  • 作者简介:KANG Jing-jing, E-mail: jjkang0206@gmail.com
  • 基金资助:

    This work was supported by the grants from the National Natural Science Foundation of China (30800812).

Dramatic Changes of Matrix Metalloproteinases-7 and Lysozyme in the Ulcerative Colitis of Mice Induced by Dextran Sulfate Sodium

 KANG Jing-jing, ZHAO De-ming, TENG Ke-dao, JIAO Xi-lan, WANG Ping-li, SUN Zhe, NI Peipei, WANG Zhi-feng, ZHANG Rui, YANG Yu-rong , LIANG Hong-de   

  1. 1、Pathology Laboratory, College of Animal Husbandry and Veterinary Science, Henan Agricultural University, Zhengzhou 450002, P.R.China
    2、College of Animal Medicine, China Agricultural University, Beijing 100193, P.R.China
  • Received:2012-10-16 Online:2014-04-01 Published:2014-04-16
  • Contact: YANG Yu-rong, E-mail: yangyu7712@sina.com; LIANG Hong-de, Tel: +86-371-63554600, E-mail: hdliang12@163.com
  • About author:KANG Jing-jing, E-mail: jjkang0206@gmail.com
  • Supported by:

    This work was supported by the grants from the National Natural Science Foundation of China (30800812).

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摘要： Ulcerative colitis (UC) is a lifelong illness with profound emotional and social impacts, and could cause serious damage to large intestine, especially in colon. However, the pathogenesis of UC remained unclear. The present study attempts to find out the role of matrix metalloproteinases-7 (MMP-7) and lysozyme in the pathogenesis of UC through a mice model induced by dextran sulfate sodium (DSS). The UC model was evaluated both by disease activity index (DAI) and the intestinal histopathology. The results show that there is a high correlation between the DAI score and the pathological changes of colon. Interleukin-6 (IL-6) serum levels and large intestinal fluids levels in UC mice are always higher than that of the control groups, which might be associated with the degree of the inflammation damage in the colon. The change tendency of the MMP-7 mRNA and protein expressions are both up-regulated firstly and then down-regulated from 1 to 5 d in the colon, but only the MMP-7 protein is up-regulated at 7 d again. The up-regulated MMP-7 levels in the early stage of UC may play a protective role through the activated defensins, while the down-regulated levels in the mid-later stage of UC may be connected with the severe lesions in the colon. However, the up-regulated MMP-7 levels in the later stage of UC in the colon may also contribute to the tissue repair or be served as a marker to CRC (colorectal cancer). The distribution of lysozyme protein indicates that there may be Paneth-like cells in the colon. Both the changes of MMP-7 and lysozyme in the small intestine may play a protective role for the safe environment of the whole gut, especially to the colon of UC.

关键词: matrix metalloproteinases-7 , lysozyme , interleukin-6 , ulcerative colitis , dextran sulfate sodium

Abstract: Ulcerative colitis (UC) is a lifelong illness with profound emotional and social impacts, and could cause serious damage to large intestine, especially in colon. However, the pathogenesis of UC remained unclear. The present study attempts to find out the role of matrix metalloproteinases-7 (MMP-7) and lysozyme in the pathogenesis of UC through a mice model induced by dextran sulfate sodium (DSS). The UC model was evaluated both by disease activity index (DAI) and the intestinal histopathology. The results show that there is a high correlation between the DAI score and the pathological changes of colon. Interleukin-6 (IL-6) serum levels and large intestinal fluids levels in UC mice are always higher than that of the control groups, which might be associated with the degree of the inflammation damage in the colon. The change tendency of the MMP-7 mRNA and protein expressions are both up-regulated firstly and then down-regulated from 1 to 5 d in the colon, but only the MMP-7 protein is up-regulated at 7 d again. The up-regulated MMP-7 levels in the early stage of UC may play a protective role through the activated defensins, while the down-regulated levels in the mid-later stage of UC may be connected with the severe lesions in the colon. However, the up-regulated MMP-7 levels in the later stage of UC in the colon may also contribute to the tissue repair or be served as a marker to CRC (colorectal cancer). The distribution of lysozyme protein indicates that there may be Paneth-like cells in the colon. Both the changes of MMP-7 and lysozyme in the small intestine may play a protective role for the safe environment of the whole gut, especially to the colon of UC.

Key words: matrix metalloproteinases-7 , lysozyme , interleukin-6 , ulcerative colitis , dextran sulfate sodium