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Research Papers

Rapid and transient expression of Ets2 in mature macrophages following stimulation with cMGF, LPS, and PKC activators.

Institut de la Santé et de la Recherche Médicale U 186/Centre National de la Recherche Scientifique, UA 041160, Institut Pasteur, Lille, France.

Abstract

We reported previously that Ets2 is expressed in normal and transformed macrophages. We show here that the expression of both c-ets-2 mRNA proteins is induced rapidly and transiently in chicken nondividing bone marrow-derived macrophages but not in E26-transformed myeloblasts in response to chicken myelomonocytic growth factor (cMGF), an avian hematopoietic growth factor required for survival, proliferation, and colony formation of avian myeloid cells. c-ets-2 expression is also rapidly induced in chicken bone marrow-derived macrophages, human monocytes, and mouse peritoneal macrophages in response to LPS and/or PKC activators. The rapid induction of Ets2 after treatment of chicken bone marrow-derived macrophages by cMGF is blunted after down-regulation or inactivation of PKC, suggesting a role of PKC in the cMGF-induced signal transduction pathway. Because Ets2 is localized in the nucleus of macrophages and binds to DNA in vitro, the kinetics of its expression suggest a role for Ets2 in the transduction within the nucleus of specific signals received at the cell membrane and involved in securing the survival and/or the development of functional competence of these cells.

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