Abstract:
:Unique hybrids (HINS and CANS lines) between macrophages and a myeloma cell line, NS1 initially expressed myeloma functions but later expressed active macrophage functions together with constitutive expression of c-fos gene. Enhancement of c-fos transcription was also observed in activated mouse peritoneal macrophages, and a range of macrophage-stimulating substance was found to induce c-fos transcription kinetic unique to each stimulator including immediate, delayed and prolonged responses in aged HINS-B3 cells, which displayed low levels of steady-state c-fos transcription. It was also found that a significant enhancement of c-fos transcription followed restimulation with either interferon gamma (IFN gamma) or lipopolysaccharide (LPS) after an initial IFN gamma stimulation. Thus it appeared that enhanced c-fos expression was closely connected with macrophage activation. On the other hand, macrophage stimulators suppressed [3H]thymidine incorporation into aged HINS-B3 cells. These results may simply suggest that c-fos expression contributes to macrophase activation but not to cell proliferation. However, it is also possible to speculate that c-fos expression contributes to cell proliferation as a salvage system operating to overcome the suppression during the macrophage activation.
journal_name
Oncogenejournal_title
Oncogeneauthors
Higuchi Y,Setoguchi M,Yoshida S,Akizuki S,Yamamoto Ssubject
Has Abstractpub_date
1988-05-01 00:00:00pages
515-21issue
5eissn
0950-9232issn
1476-5594journal_volume
2pub_type
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