Enhancement of c-fos expression is associated with activated macrophages.

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

Oncogene

journal_title

Oncogene

authors

Higuchi Y,Setoguchi M,Yoshida S,Akizuki S,Yamamoto S

subject

Has Abstract

pub_date

1988-05-01 00:00:00

pages

515-21

issue

5

eissn

0950-9232

issn

1476-5594

journal_volume

2

pub_type

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