An Ultrastructural Study of Cell-Cell Contact between Mouse Spleen Cells and Calvaria-Derived Osteoblastic Cells in a Co-Culture System for Osteoclast Formation

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著者

    • AMIZUKA Norio
    • 1st Department of Oral Anatomy, Niigata University School of Dentistry
    • SUDA Tatsuo
    • Department of Biochemistry, Showa University School of Dentistry
    • OZAWA Hidehiro
    • 1st Department of Oral Anatomy, Niigata University School of Dentistry

抄録

We have previously established a mouse co-culture system of osteoblastic cells and spleen cells for examining osteoclast differentiation. In the present study, we examined the morphological features of the cell-cell contact between mouse spleen cells and osteoblastic cells in the co-cultures. Light microscopic investigations revealed that tartrate-resistant acid phosphatase (TRAP)positive mononuclear and multinucleated spleen cells appeared in the vicinity of alkaline phosphatase (ALP)-positive osteoblastic cells. Ultrastructurally, spleen cells extended long cytoplasmic filopodia in all directions, by which spleen cells touched adjacent osteoblastic cells. The adjacent osteoblastic cells and spleen cells adhered to each other by forming electron-dense cytoplasmic materials on their inner leaflets of plasma membranes at cell-cell contact sites. Some adjacent osteoblastic and spleen cells made contact on the plasma membranes, forming an extracellular microenvironment. Coated pits were also formed on the plasma membranes facing this microenvironment. These morphological features of the cell-cell contact between osteoblastic cells and spleen cells indicate that there is internalization of organic components, i.e., receptor-mediated endocytosis in the contact sites between the two types of cells.

We have previously established a mouse coculture system of osteoblastic cells and spleen cells for examining osteoclast differentiation. In the present study, we examined the morphological features of the cell-cell contact between mouse spleen cells and osteoblastic cells in the co-cultures. Light microscopic investigations revealed that tartrate-resistant acid phosphatase (TRAP)-positive mononuclear and multinucleated spleen cells appeared in the vicinity of alkaline phosphatase (ALP)-positive osteoblastic cells. Ultrastructurally, spleen cells extended long cytoplasmic filopodia in all directions, by which spleen cells touched adjacent osteoblastic cells. The adjacent osteoblastic cells and spleen cells adhered to each other by forming electron-dense cytoplasmic materials on their inner leaflets of plasma membranes at cell-cell contact sites. Some adjacent osteoblastic and spleen cells made contact on the plasma membranes, forming an extracellular microenvironment. Coated pits were also formed on the plasma membranes facing this microenvironment. These morphological features of the cell-cell contact between osteoblastic cells and spleen cells indicate that there is internalization of organic components, i.e., receptor-mediated endocytosis in the contact sites between the two types of cells.

収録刊行物

  • Acta histochemica et cytochemica

    Acta histochemica et cytochemica 30(4), 351-362, 1997-08-01

    日本組織細胞化学会

参考文献:  31件中 1-31件 を表示

被引用文献:  5件中 1-5件 を表示

各種コード

  • NII論文ID(NAID)
    10008607104
  • NII書誌ID(NCID)
    AA00508022
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    00445991
  • データ提供元
    CJP書誌  CJP引用  IR  J-STAGE 
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