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Induced CSF-1 Production and its Effects on C-FMS Transfected Monoblastic U937 Cells
This study examined how the monoblast-like human histiocytic lymphoma cell line U937 can be induced by phorbol 12-myristrate 13-acetate (PMA) to undergo differentiation. In order to study the mechanism of action of CSF-1, a CSF-1 receptor gene (c-fms) was transfected into U937 cells. Exogenous CSF-1 treatment induced an autocrine response in this CSF-1 was determined and all events were shown to be time dependent. CSF-1 stimulation also enhanced proto-oncogene c-jun and c-myc gene expression. Complementary DNA coding for Jun or Fos was introduced into U937 cells by transfection. The transfection did not generate a high level of CSF-1 gene expression which suggests that Fos and Jun alone are insufficient to induce CSF-1 synthesis.
Date:
August 1992
Creator:
Liu, Mu-ya
System:
The UNT Digital Library