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. 1993 May 1;90(9):4097–4101. doi: 10.1073/pnas.90.9.4097

Transcriptional activation of low density lipoprotein receptor gene by angiotensin-converting enzyme inhibitors and Ca(2+)-channel blockers involves protein kinase C isoforms.

L H Block 1, R Keul 1, M Crabos 1, R Ziesche 1, M Roth 1
PMCID: PMC46453  PMID: 7683421

Abstract

The pharmacological potency of angiotensin-converting enzyme (ACE) inhibitors (lisinopril and enalaprilat) on the transcription of low density lipoprotein receptor and 3-hydroxy-3-methylglutaryl-CoA reductase genes was examined in human vascular smooth muscle cells and compared with the action of Ca(2+)-channel blockers (manidipine, verapamil, and diltiazem). Analogous to Ca(2+)-channel blockers, nanomolar concentrations of enalaprilat or lisinopril stimulated the synthesis of low density lipoprotein receptor mRNA and amplified the transcription induced by recombinant platelet-derived growth factor BB. In contrast to Ca(2+)-channel blockers, ACE inhibitors did not alter the transcription of the 3-hydroxy-3-methylglutaryl-CoA reductase gene. Platelet-derived growth factor BB stimulated the translocation of delta and epsilon isoforms of protein kinase C. Similar to Ca(2+)-channel blockers, ACE inhibitors reduced the translocation of delta and epsilon isoforms of protein kinase C. Furthermore, ACE inhibitors and Ca(2+)-channel blockers inhibited platelet-derived growth factor BB-induced transcription of c-fos and c-jun genes. The findings suggest that increased de novo synthesis of mRNA low density lipoprotein receptor apparently involves the participation of delta and epsilon isoforms of protein kinase C and transcription factors c-Fos and c-Jun.

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Selected References

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