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2004 Fiscal Year Final Research Report Summary

Possible mechanisms of induction of apoptosis in enterocytes by intraepithelial lymphocytes.

Research Project

Project/Area Number 15603007
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 細胞死(アポトーシス)
Research InstitutionKinki University

Principal Investigator

YAGI Hideki  Kinki University, School of Pharmaceutical Sciences, Lecturer, Ph, D., 薬学部, 講師 (40250740)

Co-Investigator(Kenkyū-buntansha) MASUKO Takashi  Kinki University, School of Pharmaceutical Sciences, Professor, Ph.D., 薬学部, 教授 (30157200)
NAKAMURA Masanori  Showa University, School of Dentistry, Professor, Ph.D., 歯学部, 教授 (50180394)
Project Period (FY) 2003 – 2004
Keywordsintra-epithelial lymphocytes / apoptosis / FK506 / enterocytes / nude mouse / scid mouse
Research Abstract

We reported that the administration of anti-CD3 monoclonal antibody (mAb) and subsequently activation of intestinal intra-epithelial lymphocytes (i-IELs) could induce apoptosis to enterocytes. To elucidate the mechanism of the induction of apoptosis in enterocytes by activated i-IELs, we designed experiments to stimulate the IEL by anti-CD3 mAb and to examine the subsequent changes to the enterocytes. In rats, the enterocytes showed massive DNA fragmentation 30 mm and subsequent detachment 2 hours after injection of anti-CD3 mAb (1F4) made in our laboratory. Then, we newly found the growth and hypertrophy of the goblet cells in rats.
We designed experiments to inactivate the IEL by immunosuppressant, FK506 and to analyze the subsequent changes of the enterocytes. The inactivation of i-IELs by daily administration of FK506 disappeared apoptosis of enterocytes in villus. Then, in the enterocytes, the long term daily administration of FK506 caused decrease in the expression of amino acid t … More ransporter, CD98 and the activity of alkaline phosphatase (ALP). Furthermore, these treatments induced the disappearance and heterogenous expression of F-actin in microvilli of enterocytes. It showed that the inactivation of i-IELs by daily administration of FK506 could inhibit apoptosis in enterocytes, and these results suggested that the dysfunctional enterocytes, which should have been led to apoptosis, remained on the villus.
With the immunodeficiency mice that decreased i-IEL, we analyzed morphological and functional changes in epithelial cells. The enterocytes in nude and scid mice decreased in the expression of amino acid transporter, CD98, the activity of ALP, and the adhesion activity with basement membrane due to the decline in the expression of integrin α_6 on the enterocytes. The administration of CD3 mAb failed to exfoliate the epithelium and cause severe diarrhea in these immunodeficiency mice. Therefore, i-IELs may have an important role in maintenance of epithelial cells on the villus. Less

  • Research Products

    (5 results)

All 2004 2003

All Journal Article (5 results)

  • [Journal Article] SMC6 is required for MMS-induced interchromosomal and sister chromatid recombinations in Saccharomyces cerevisiae2004

    • Author(s)
      Onoda, F., et al.
    • Journal Title

      DNA Repair 3

      Pages: 429-439

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Morphological and functional alteration of enterocytes by the daily administration of FK506 : Application of UV-excited alkaline phosphatase substrate, ELF 97 phosphate.2004

    • Author(s)
      Yagi, H., et al.
    • Journal Title

      Cytometry Research 14

      Pages: 41-46

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Expression of CD98 amino acid transporter on murine haematopoietic stem cells.2004

    • Author(s)
      Yagi, H., et al.
    • Journal Title

      Cytometry Research 14

      Pages: 57-62

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Functional relation among RecQ family helicase RecQL1, RecQL5, and BLM in cell growth and sister chromatid exchange formation.2003

    • Author(s)
      Wang, W., et al.
    • Journal Title

      Molecular and Cellular Biology 23

      Pages: 3527-3535

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Do peritoneal macrophages play an essential role in the progression of acute pancreatitis in rats?2003

    • Author(s)
      Mikami, Y., et al.
    • Journal Title

      Pancreas 27

      Pages: 253-260

    • Description
      「研究成果報告書概要(和文)」より

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Published: 2006-07-11  

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