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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Linoleic acid and its metabolites, hydroperoxyoctadecadienoic acids, stimulate c-Fos, c-Jun, and c-Myc mRNA expression, mitogen-activated protein kinase activation, and growth in rat aortic smooth muscle cells.

Previous studies from other laboratories suggest that linoleic acid and its metabolites, hydroperoxyoctadecadienoic acids, play an important role in modulating the growth of some cells. A correlation has been demonstrated between hydroperoxyoctadecadienoic acids and conditions characterized by abnormal cell growth such as atherosclerosis and psoriasis. To determine if linoleic acid and its metabolites modulate cell growth in atherosclerosis, we measured DNA synthesis, protooncogene mRNA expression, and mitogen-activated protein kinase ( MAPK) activation in vascular smooth muscle cells (VSMC). Linoleic acid induces DNA synthesis, c-fos, c-jun, and c-myc mRNA expression and MAPK activation in VSMC. Furthermore, nordihydroguaiaretic acid, a potent inhibitor of the lipoxygenase system, significantly reduced the growth-response effects of linoleic acid in VSMC, suggesting that conversion of linoleic acid to hydroperoxyoctadecadienoic acids (HPODEs) is required for these effects. HPODEs also caused significant induction of DNA synthesis, protooncogene mRNA expression, and MAPK activation in growth-arrested VSMC, suggesting that linoleic acid and its metabolic products, HPODEs, are potential mitogens in VSMC, and that conditions such as oxidative stress and lipid peroxidation which provoke the production of these substances may alter VSMC growth.[1]

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