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. 1991 Mar 1;88(5):1888–1892. doi: 10.1073/pnas.88.5.1888

Expressions of the low density lipoprotein receptor and 3-hydroxy-3-methylglutaryl coenzyme A reductase genes are stimulated by recombinant platelet-derived growth factor isomers.

M Roth 1, L R Emmons 1, A Perruchoud 1, L H Block 1
PMCID: PMC51131  PMID: 2000393

Abstract

The plausible role that platelet-derived growth factor (PDGF) has in the localized pathophysiological changes that occur in the arterial wall during development of atherosclerotic lesions led us to investigate the influence of recombinant (r)PDGF isomers -AA, -AB, and -BB on the expression of low density lipoprotein receptor (LDL-R) and 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase [(S)-mevalonate:NAD+ oxidoreductase (CoA-acylating), EC 1.1.1.88] genes. In addition, we clarified the role of protein kinase C (PKC) in expression of the two genes in human skin fibroblasts and vascular smooth muscle cells. The various rPDGF isoforms are distinct in their ability to activate transcription of both genes: (i) Both rPDGF-AA and -BB stimulate transcription of the LDL-R gene; in contrast, rPDGF-BB, but not -AA, activates transcription of the HMG-CoA reductase gene. (ii) All recombinant isoforms of PDGF activate transcription of the c-fos gene. (iii) While rPDGF-dependent transcription of the LDL-R gene occurs independently of PKC, transcription of the HMG-CoA reductase gene appears to involve the action of that enzyme.

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