AIMS: Previous studies showed that natural prenyloxyphenylpropanoid derivatives have potent biological properties in vivo. Given the structural similarities between these compounds and known peroxisome proliferator-activated receptor (PPAR) agonists, the present study examined the hypothesis that propenoic acid derivatives activate PPARs. MAIN METHODS: Chimeric reporter assays were performed to identify propenoic acid derivates that could activate PPARs. Quantitative polymerase chain reaction (qPCR) analysis of wild-type and Pparbeta/delta-null mouse primary keratinocytes was performed to determine if a test compound could specifically activate PPARbeta/delta. A human epithelial carcinoma cell line and primary mouse keratinocytes were used to determine the effect of the compound on cell proliferation. KEY FINDINGS: Three of the propenoic acid derivatives activated PPARs, with the greatest efficacy being observed with prenyloxycinnamic acid derivatives 4'-geranyloxyferulic acid (compound 1) for PPARbeta/delta. Compound 1 increased expression of a known PPARbeta/delta target gene through a mechanism that requires PPARbeta/delta. Inhibition of cell proliferation by compound 1 was found in a human epithelial carcinoma cell line. SIGNIFICANCE: Results from these studies demonstrate that compound 1 can activate PPARbeta/delta and inhibit cell proliferation of a human skin cancer cell line, suggesting that the biological effects of 4'-geranyloxyferulic acid may be mediated in part by activating this PPAR isoform. Copyright 2010 Elsevier Inc. All rights reserved.
AIMS: Previous studies showed that natural prenyloxyphenylpropanoid derivatives have potent biological properties in vivo. Given the structural similarities between these compounds and known peroxisome proliferator-activated receptor (PPAR) agonists, the present study examined the hypothesis that propenoic acid derivatives activate PPARs. MAIN METHODS: Chimeric reporter assays were performed to identify propenoic acid derivates that could activate PPARs. Quantitative polymerase chain reaction (qPCR) analysis of wild-type and Pparbeta/delta-null mouse primary keratinocytes was performed to determine if a test compound could specifically activate PPARbeta/delta. A humanepithelial carcinoma cell line and primary mouse keratinocytes were used to determine the effect of the compound on cell proliferation. KEY FINDINGS: Three of the propenoic acid derivatives activated PPARs, with the greatest efficacy being observed with prenyloxycinnamic acid derivatives 4'-geranyloxyferulic acid (compound 1) for PPARbeta/delta. Compound 1 increased expression of a known PPARbeta/delta target gene through a mechanism that requires PPARbeta/delta. Inhibition of cell proliferation by compound 1 was found in a humanepithelial carcinoma cell line. SIGNIFICANCE: Results from these studies demonstrate that compound 1 can activate PPARbeta/delta and inhibit cell proliferation of a humanskin cancer cell line, suggesting that the biological effects of 4'-geranyloxyferulic acid may be mediated in part by activating this PPAR isoform. Copyright 2010 Elsevier Inc. All rights reserved.
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