Heterogeneity of Mouse Thymic Macrophages : I. Immunohistochemical Analysis

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著者

    • NAKAMURA Masanori
    • 東北大学医学部解剖学第三講座 Department of Anatomy, Tohoku University School of Medicine
    • YAGI Hideki
    • 東北大学医学部解剖学第三講座 Department of Anatomy, Tohoku University School of Medicine
    • KAYABA Shoichi
    • 東北大学医学部解剖学第三講座 Department of Anatomy, Tohoku University School of Medicine
    • ISHII Tadashi
    • 東北大学医学部解剖学第三講座 Department of Anatomy, Tohoku University School of Medicine
    • GOTOH Takahiro
    • 東北大学医学部解剖学第三講座 Department of Anatomy, Tohoku University School of Medicine
    • ITOH Tsunetoshi
    • 東北大学医学部解剖学第三講座 Department of Anatomy, Tohoku University School of Medicine

抄録

As the first step toward understanding the identity and functions of thymic macrophages <i>in situ</i>, we examined the phenotypic heterogeneity of mouse thymic macrophages in tissue sections by the immunohistochemical double staining method with four monoclonal antibodies (F4/80, Mac-2, anti-CD32/16 and anti-I-A antibodies) as macrophage markers. Morphologically, three types of macrophages were identified: dendritic, round and flat-shaped. Dendritic macrophages were scattered throughout the thymus, and most of them were stained by all four markers. Among these macrophages, those at the cortico-medullary region (CMR) expressed a high intensity of CD32/16 antigen. Round macrophages were also distributed throughout the thymus; most of them, however, were localized in the cortico-medullary region to the medulla. These cells were F4/80-negative, Mac-2-positive, CD32/16-negative and I-A-positive. In contrast, round macrophages located at the cortex expressed F4/80. Flatshaped macrophages were localized at the subcapsular region of the cortex where active lymphopoiesis was observed. This type was positive for F4/80 and CD32/16, but negative for Mac-2. Furthermore, most of the three types of thymic macrophages showed intense reactions of the I-A antigen within the cytoplasm in addition to the expression of I-A antigen on the cell membrane. These results indicate that morphological characteristics of thymic macrophages at different locations reflect phenotypic variations detected in immunohistochemistry, and suggest that these different type macrophages may play distinct roles at various locations in thymocyte development in the thymus.

収録刊行物

  • Archives of histology and cytology

    Archives of histology and cytology 60(1), 53-63, 1997-03-01

    国際組織細胞学会

参考文献:  39件中 1-39件 を表示

被引用文献:  2件中 1-2件 を表示

各種コード

  • NII論文ID(NAID)
    10013864700
  • NII書誌ID(NCID)
    AA1068990X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    09149465
  • データ提供元
    CJP書誌  CJP引用  J-STAGE 
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