CGA-7 AND HHF, 2 MONOCLONAL-ANTIBODIES THAT RECOGNIZE MUSCLE ACTIN AND REACT WITH ADHERENT CELLS IN HUMAN LONG-TERM BONE-MARROW CULTURES

  • 1 January 1985
    • journal article
    • research article
    • Vol. 66  (5) , 1138-1142
Abstract
The CGA-7, a monoclonal antibody that reacts with smooth muscle cell actin but not with endothelial cell or fibroblast actin, and HHF, a monoclonal antibody that reacts with smooth muscle, skeletal muscle, and cardiac muscle actin, both recognize microfilaments present within adherent cells from actively hematopoietic human long-term marrow cultures. Macrophages, monocytes, and cultured marrow fibroblasts do not react with either antibody. These data suggest that the anti-actin antibodies may serve as useful markers for in vitro microenvironmental cells and lend support to the hypothesis that stromal cells from long-term marrow cultures are different from marrow fibroblasts and may constitute a unique cell lineage.

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