Effects of endothelial-cell-derived growth factors on cultured astrocytes.
To clarify the participation of endothelial-cell-derived growth factors (ECDGFs) in astrocytosis, the effects of endothelial-cell-conditioned medium (ECCM) derived either from normotensive rats or spontaneously hypertensive, stroke-prone rats (SHRSPs) on proliferation of C6 cells of an established rat glioma cell line were bioassayed. The ECCM from both strains stimulated proliferation of astrocytes, but the ECCM from SHRSPs showed a higher mitogenic activity for astrocytes than that from normotensive rats. Growth-promoting activity of the ECCM derived from SHRSPs showed an increase that was linear to the conditioning time. These results seem to indicate that endothelial cells produce and release factors that promote the growth of astrocytes. It seems also probable that chronic hypertension causes an increase in production and release of such ECDGFs that correlated with astrocytic proliferation.
Watanabe
K
K
Department of Neurosurgery, Shiga University of Medical Science, Ohtsu, Japan.
Sasahara
M
M
Hazama
F
F
Handa
J
J
D000818:Animals; D001253:Astrocytes / Q000166:cytology* / Q000187:drug effects; D002455:Cell Division; D002478:Cells, Cultured; D016228:Endothelial Growth Factors / Q000494:pharmacology*; D008297:Male; D051381:Rats; D011918:Rats, Inbred SHR; D011919:Rats, Inbred Strains; D011921:Rats, Inbred WKY
D016228:Endothelial Growth Factors