Interleukin-4 modulates the proliferation and differentiation of glial cells.
We examined the effects of the T cell-derived cytokine, interleukin (IL)-4 on the proliferation and differentiation of C6 glial cells. IL-4 exerted a biphasic effect on cell proliferation, increasing cell proliferation at concentrations ranging from 10 to 50 ng/ml and inhibiting at higher concentrations. Inhibition of cell proliferation was associated with differentiation of the cells to express astrocytic phenotypes as evidenced by morphology, increased glial fibrillary acidic protein (GFAP) immunoreactivity and elevated glutamine synthetase expression. IL-4 also induced the secretion of nerve growth factor by these cells. These results suggest an important role for IL-4 during instances of CNS trauma and inflammation.
Brodie
C
C
Department of Life Sciences, Bar-Ilan University, Ramat-Gan, Israel.
Goldreich
N
N
D001253:Astrocytes / Q000166:cytology / Q000378:metabolism; D002454:Cell Differentiation; D002455:Cell Division; D002460:Cell Line; D004247:DNA / Q000096:biosynthesis; D005904:Glial Fibrillary Acidic Protein / Q000378:metabolism; D005974:Glutamate-Ammonia Ligase / Q000378:metabolism; D006801:Humans; D015847:Interleukin-4 / Q000276:immunology*; D009414:Nerve Growth Factors / Q000096:biosynthesis; D009457:Neuroglia / Q000166:cytology* / Q000378:metabolism
D005904:Glial Fibrillary Acidic Protein; D009414:Nerve Growth Factors; D015847:Interleukin-4; D004247:DNA; D005974:Glutamate-Ammonia Ligase