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. 1993 Feb 15;290(Pt 1):135–138. doi: 10.1042/bj2900135

Modulation of expression of endogenous collagenase and collagen genes by electroporation: possible involvement of Ca2+ and protein kinase C.

C A Lambert 1, P Y Lefebvre 1, B V Nusgens 1, C M Lapière 1
PMCID: PMC1132392  PMID: 8439282

Abstract

We have investigated the effect of electroporation on the expression of collagen alpha 1(I), collagenase, c-fos and c-jun genes in human dermal fibroblasts (HDF), human smooth muscle cells (HSMC) and HeLa cells. Collagenase and collagen mRNA levels were respectively increased and decreased in a voltage-dependent manner in HDF harvested 2 days after a sham electroporation. These effects were still observed 10 days after electroporation. Similar effects occurred in electroporated HSMC. Neither collagen nor collagenase mRNAs were detected in control or electroporated HeLa cells. c-fos and c-jun mRNA levels were also increased in electroporated HDF, HSMC and HeLa cells harvested 1 h after plating. This suggests that factor AP1 (fos/jun) could mediate the up-regulation of collagenase expression in electroporated HDF and HSMC. When electroporation of HDF was performed in the presence of H7, an inhibitor of protein kinase C, no increase in collagenase mRNA level was observed, suggesting that protein kinase C might be involved in the transduction of the effect. All the effects reported were also suppressed when cells were electroporated in a medium containing EGTA, suggesting that Ca2+ might mediate the transduction of this effect.

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Selected References

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