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Establishment of specific monoclonal antibodies against recombinant human granulocyte colony-stimulating factor (hG-CSF) and their application for immunoperoxidase staining of paraffin-embedded sections

K Shimamura, J Fujimoto, J Hata, A Akatsuka, Y Ueyama, T Watanabe and N Tamaoki

Department of Pathology, Tokai University School of Medicine, Kanagawa, Japan.

Detection of granulocyte colony-stimulating factor (G-CSF), one of the substances responsible for proliferation and differentiation of granulocytes, has been performed up to the present by use of the granulocyte colony-formation assay, because of the lack of a specific anti-G-CSF antibody. This has prevented the advancement of biological investigations of cell dynamics linked to G-CSF, e.g., cell localization of G-CSF and its pathophysiological changes. In the present work, two monoclonal antibodies (MAb), 1E7 and 4A6, against recombinant human G-CSF (rhG-CSF) were developed by cell hybridization between NS-1 myeloma cells and splenocytes from a mouse immunized with rhG-CSF. 1E7 and 4A6 were shown to be reactive with hG-CSF but not with other CSF (hGM-CSF, hIL-3, and mouse GM-CSF) by Western blot analysis. An immunoperoxidase staining method using these MAb was then established. This method was applicable to frozen sections, paraffin- embedded sections, and cells fixed with 4% paraformaldehyde. Positive staining for G-CSF was observed in tumor cells secreting G-CSF and also in Chinese hamster ovary (CHO) cells transfected with hG-CSF cDNA. However, no staining was seen in tumor cells secreting no G-CSF, untransfected CHO cells, lung fibroblasts, or bone marrow stromal cells after short periods of culture. These results confirmed the immunospecificity of MAb 1E7 and 4A6 and the validity of their application to immunohistochemistry using paraffin-embedded sections.

Volume 38, Issue 2, pp. 283-286, 02/01/1990
Copyright © 1990 by The Histochemical Society


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K. Yanagi, S. Makinoda, R. Fujii, S. Miyazaki, S. Fujita, H. Tomizawa, K. Yoshida, T. Iura, T. Takegami, and T. Nojima
Cyclic changes of granulocyte colony-stimulating factor (G-CSF) mRNA in the human follicle during the normal menstrual cycle and immunolocalization of G-CSF protein
Hum. Reprod., December 1, 2002; 17(12): 3046 - 3052.
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