TY - JOUR
T1 - Production of macrophage migration inhibitory factor(s) (MIF) by virus-transformed cells
AU - Poste, G.
N1 - Funding Information:
The technical assistanceo f F. Dutton, P. Newhouse and A. MacKearnin is gratefully acknowledged. This work was supported by Grant No. CA 13393 from the NIH.
PY - 1975/5
Y1 - 1975/5
N2 - Rodent cell lines transformed by SV40, polyoma virus and Rous sarcoma virus cultured in vitro release material into the culture medium which inhibits the migration of guinea pig macrophages. Similar macrophage migration inhibitory factors (MIF) were not detected in cell-free supernatants harvested from untransformed cell cultures. Comparison of the MIF produced by virus-transformed cells with MIF derived from peripheral lymphocytes stimulated in vitro by phytohemagglutinin (PHA) revealed that they had similar molecular weights (25 000), heat stability and were both inhibited by α-fucose and lotus agglutinin. Incubation of MIF-containing cell-free supernatants from transformed cells with pancreatic trypsin inhibitor, soybean trypsin inhibitor and diisopropylfluorophosphate eliminated the MIF activity. The possible identity of the MIF released by transformed cells as a protease is discussed with reference to a potential role in modifying the surface properties of transformed cells.
AB - Rodent cell lines transformed by SV40, polyoma virus and Rous sarcoma virus cultured in vitro release material into the culture medium which inhibits the migration of guinea pig macrophages. Similar macrophage migration inhibitory factors (MIF) were not detected in cell-free supernatants harvested from untransformed cell cultures. Comparison of the MIF produced by virus-transformed cells with MIF derived from peripheral lymphocytes stimulated in vitro by phytohemagglutinin (PHA) revealed that they had similar molecular weights (25 000), heat stability and were both inhibited by α-fucose and lotus agglutinin. Incubation of MIF-containing cell-free supernatants from transformed cells with pancreatic trypsin inhibitor, soybean trypsin inhibitor and diisopropylfluorophosphate eliminated the MIF activity. The possible identity of the MIF released by transformed cells as a protease is discussed with reference to a potential role in modifying the surface properties of transformed cells.
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U2 - 10.1016/0014-4827(75)90382-1
DO - 10.1016/0014-4827(75)90382-1
M3 - Article
C2 - 165954
AN - SCOPUS:0016788669
SN - 0014-4827
VL - 92
SP - 283
EP - 290
JO - Experimental Cell Research
JF - Experimental Cell Research
IS - 2
ER -