Ultrastructural immunocytochemical characterization of human long-term bone marrow cultures has shown positive localization for growth factors on cell surface and on extracellular matrix(ECM).In some cases double-labe...Ultrastructural immunocytochemical characterization of human long-term bone marrow cultures has shown positive localization for growth factors on cell surface and on extracellular matrix(ECM).In some cases double-labelling indicated co-localization of growth factors and specific cell surface labels.Specific markers for endothelial cells and fibroblasts showed that growth factor(GM-CSF,G-CSF and b-FGF) were present at the surface of these cell types.Both scanning and transmission electron microscopy indicated intense labelling for growth factors on the extracellular matrix.Double-labelling of heparan sulphate proteoglycans and GM-CSF showed a co-localization of the labelling,which indicated the binding of growth factor to the extracellular matrix.展开更多
文摘Ultrastructural immunocytochemical characterization of human long-term bone marrow cultures has shown positive localization for growth factors on cell surface and on extracellular matrix(ECM).In some cases double-labelling indicated co-localization of growth factors and specific cell surface labels.Specific markers for endothelial cells and fibroblasts showed that growth factor(GM-CSF,G-CSF and b-FGF) were present at the surface of these cell types.Both scanning and transmission electron microscopy indicated intense labelling for growth factors on the extracellular matrix.Double-labelling of heparan sulphate proteoglycans and GM-CSF showed a co-localization of the labelling,which indicated the binding of growth factor to the extracellular matrix.