Transforming growth factor-beta enhances the M-CSF and GM-CSF-stimulated proliferation of macrophages
- PMID: 1737928
Transforming growth factor-beta enhances the M-CSF and GM-CSF-stimulated proliferation of macrophages
Abstract
Transforming growth factor-beta (TGF-beta) has been shown to regulate the proliferation and function of several different cell types in the immune system. We have examined the effect of TGF-beta on the proliferation of murine macrophages in liquid culture. TGF-beta by itself did not induce proliferation of differentiated (7 days in culture) bone marrow-derived macrophages (BMM). In the presence of M-CSF, TGF-beta enhanced the proliferation of differentiated BMM and elicited peritoneal macrophages but had an inhibitory effect on the proliferation of nonadherent BMM (3 days in culture). The effect of TGF-beta was not restricted to M-CSF-dependent proliferation but was also observed for GM-CSF-dependent proliferation. The autocrine production of TGF-beta appeared to contribute to the proliferation of BMM. The addition of antibody against TGF-beta inhibited M-CSF- and GM-CSF-dependent proliferation 32% and 28%, respectively. In bone marrow, TGF-beta may be an important negative regulator of macrophage proliferation; whereas, in the tissues, TGF-beta may enhance macrophage proliferation.
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