TGF-beta-induced macrophage colony-stimulating factor gene expression in various mesenchymal cell lines.
We report here that transforming growth factor-beta (TGF-beta) can increase the expression level of macrophage colony-stimulating factor (M-CSF) mRNA in a variety of mesenchymal cell lines derived from osteoblasts, bone marrow stromal cells, fibroblasts, and myoblasts. The M-CSF activity in the conditioned medium of mouse osteoblast-like MC3T3-E1 cells was increased by TGF-beta as well as interleukin-1 (IL-1) treatment. The increase of M-CSF mRNA expression was observed as early as 2 h after TGF-beta or IL-1 addition and was superinduced by cycloheximide treatment. Nuclear run-off assays revealed that the increase in M-CSF mRNA by TGF-beta as well as IL-1 occurred, at least in part, at the transcriptional level. Platelet-derived growth factor (PDGF) also enhanced the M-CSF production in MC3T3-E1 cells. Furthermore, TGF-beta and IL-1 distinctly induced both PDGF-A and PDGF-B chain mRNA in MC3T3-E1 with different time courses. Our present studies suggest that PDGF autocrine loop-dependent and loop-independent pathways could modulate the M-CSF production stimulated by TGF-beta or IL-1 and account for the complexity of the cytokine network involving M-CSF in vivo under various physiological and pathological conditions.
Takaishi
T
T
Department of Medicine, Kobe University School of Medicine, Japan.
Matsui
T
T
Tsukamoto
T
T
Ito
M
M
Taniguchi
T
T
Fukase
M
M
Chihara
K
K
D000818:Animals; D001483:Base Sequence; D002460:Cell Line; D003513:Cycloheximide / Q000494:pharmacology; D015870:Gene Expression / Q000187:drug effects*; D007375:Interleukin-1 / Q000494:pharmacology; D016173:Macrophage Colony-Stimulating Factor / Q000235:genetics*; D008648:Mesoderm / Q000166:cytology / Q000502:physiology*; D051379:Mice; D008969:Molecular Sequence Data; D010982:Platelet-Derived Growth Factor / Q000235:genetics / Q000494:pharmacology; D011518:Proto-Oncogene Proteins / Q000235:genetics; D020574:Proto-Oncogene Proteins c-sis; D012333:RNA, Messenger / Q000378:metabolism; D014158:Transcription, Genetic; D016212:Transforming Growth Factor beta / Q000494:pharmacology*
D007375:Interleukin-1; D010982:Platelet-Derived Growth Factor; D011518:Proto-Oncogene Proteins; D020574:Proto-Oncogene Proteins c-sis; D012333:RNA, Messenger; D016212:Transforming Growth Factor beta; C075278:platelet-derived growth factor A; D016173:Macrophage Colony-Stimulating Factor; D003513:Cycloheximide