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The mitogenic signaling pathway but not the plasminogen activator- inducing pathway of basic fibroblast growth factor is mediated through protein kinase C in fetal bovine aortic endothelial cells
Basic fibroblast growth factor (bFGF) induces cell proliferation and plasminogen activator (PA) activity in transformed fetal bovine aortic endothelial (FBAE) GM 7373 cells. A similar response is observed after treatment with 12-O-tetradecanoylphorbol-13-acetate (TPA). In these cells, bFGF and TPA c...
Formato: | Texto |
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Lenguaje: | English |
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The Rockefeller University Press
1989
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2115796/ https://www.ncbi.nlm.nih.gov/pubmed/2551911 |
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collection | PubMed |
description | Basic fibroblast growth factor (bFGF) induces cell proliferation and plasminogen activator (PA) activity in transformed fetal bovine aortic endothelial (FBAE) GM 7373 cells. A similar response is observed after treatment with 12-O-tetradecanoylphorbol-13-acetate (TPA). In these cells, bFGF and TPA cause activation of protein kinase C (PKC), as demonstrated by the induction of the phosphorylation of an 87-kD PKC substrate in intact cells and by the increase in membrane-associated PKC activity. Activation of PKC by bFGF or TPA is inhibited in cells made PKC-deficient by pretreatment with high concentrations of TPA. The mitogenic activity of bFGF or of TPA is completely inhibited in PKC- deficient cells or in naive cells treated with the PKC inhibitor H-7. However, these cells proliferate in response to serum, epidermal growth factor, and dibutyryl cyclic AMP. Similar results are obtained in normal FBAE AG 7680 cells. These data indicate that activation of PKC is responsible for the mitogenic activity of bFGF in FBAE cells. On the contrary, the PA-inducing activity of bFGF is unaffected by down- regulation of PKC or by treatment with the PKC inhibitor H-7 in both transformed GM 7373 and normal AG 7680 cells. bFGF induces a rapid 45Ca influx in naive and in PKC-deprived GM 7373 cells. In these cells, addition of EGTA to the incubation medium prevents both the 45Ca influx and the increase in PA activity induced by bFGF, without affecting its mitogenic activity. Even though the involvement of PKC in the increase of cell-associated PA activity induced by bFGF can not be completely dismissed, the present results suggest a role of calcium entry in the modulation of the PA-inducing activity of bFGF. |
format | Text |
id | pubmed-2115796 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1989 |
publisher | The Rockefeller University Press |
record_format | MEDLINE/PubMed |
spelling | pubmed-21157962008-05-01 The mitogenic signaling pathway but not the plasminogen activator- inducing pathway of basic fibroblast growth factor is mediated through protein kinase C in fetal bovine aortic endothelial cells J Cell Biol Articles Basic fibroblast growth factor (bFGF) induces cell proliferation and plasminogen activator (PA) activity in transformed fetal bovine aortic endothelial (FBAE) GM 7373 cells. A similar response is observed after treatment with 12-O-tetradecanoylphorbol-13-acetate (TPA). In these cells, bFGF and TPA cause activation of protein kinase C (PKC), as demonstrated by the induction of the phosphorylation of an 87-kD PKC substrate in intact cells and by the increase in membrane-associated PKC activity. Activation of PKC by bFGF or TPA is inhibited in cells made PKC-deficient by pretreatment with high concentrations of TPA. The mitogenic activity of bFGF or of TPA is completely inhibited in PKC- deficient cells or in naive cells treated with the PKC inhibitor H-7. However, these cells proliferate in response to serum, epidermal growth factor, and dibutyryl cyclic AMP. Similar results are obtained in normal FBAE AG 7680 cells. These data indicate that activation of PKC is responsible for the mitogenic activity of bFGF in FBAE cells. On the contrary, the PA-inducing activity of bFGF is unaffected by down- regulation of PKC or by treatment with the PKC inhibitor H-7 in both transformed GM 7373 and normal AG 7680 cells. bFGF induces a rapid 45Ca influx in naive and in PKC-deprived GM 7373 cells. In these cells, addition of EGTA to the incubation medium prevents both the 45Ca influx and the increase in PA activity induced by bFGF, without affecting its mitogenic activity. Even though the involvement of PKC in the increase of cell-associated PA activity induced by bFGF can not be completely dismissed, the present results suggest a role of calcium entry in the modulation of the PA-inducing activity of bFGF. The Rockefeller University Press 1989-10-01 /pmc/articles/PMC2115796/ /pubmed/2551911 Text en This article is distributed under the terms of an Attribution–Noncommercial–Share Alike–No Mirror Sites license for the first six months after the publication date (see http://www.rupress.org/terms). After six months it is available under a Creative Commons License (Attribution–Noncommercial–Share Alike 4.0 Unported license, as described at http://creativecommons.org/licenses/by-nc-sa/4.0/). |
spellingShingle | Articles The mitogenic signaling pathway but not the plasminogen activator- inducing pathway of basic fibroblast growth factor is mediated through protein kinase C in fetal bovine aortic endothelial cells |
title | The mitogenic signaling pathway but not the plasminogen activator- inducing pathway of basic fibroblast growth factor is mediated through protein kinase C in fetal bovine aortic endothelial cells |
title_full | The mitogenic signaling pathway but not the plasminogen activator- inducing pathway of basic fibroblast growth factor is mediated through protein kinase C in fetal bovine aortic endothelial cells |
title_fullStr | The mitogenic signaling pathway but not the plasminogen activator- inducing pathway of basic fibroblast growth factor is mediated through protein kinase C in fetal bovine aortic endothelial cells |
title_full_unstemmed | The mitogenic signaling pathway but not the plasminogen activator- inducing pathway of basic fibroblast growth factor is mediated through protein kinase C in fetal bovine aortic endothelial cells |
title_short | The mitogenic signaling pathway but not the plasminogen activator- inducing pathway of basic fibroblast growth factor is mediated through protein kinase C in fetal bovine aortic endothelial cells |
title_sort | mitogenic signaling pathway but not the plasminogen activator- inducing pathway of basic fibroblast growth factor is mediated through protein kinase c in fetal bovine aortic endothelial cells |
topic | Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2115796/ https://www.ncbi.nlm.nih.gov/pubmed/2551911 |