Abstract
The antimicrobial peptide PR39 is a porcine cathelicidin with angiogenic and antiapoptotic activities, as it can regulate the expression of vascular endothelial growth factor (VEGF) and inhibitor apoptosis protein-2 (c-IAP-2) in endothelial cells. The human homolog LL-37 has been found to be highly expressed in human keratinocytes from psoriatic patients, but it is not known whether LL-37 can modulate the expression of VEGF and c-IAP-2 in keratinocytes, as both molecules are involved in the overgrowth of psoriatic skin. Therefore, in this work, we studied the possible role of CAP18/LL-37 in the modulation of VEGF and c-IAP-2 expression in human keratinocytes. The CAP18/LL-37 gene was cloned into a plasmid that contained green fluorescent protein (GFP). This plasmid was called pGFP-CAP18/LL-37. The expression of LL-37, VEGF, and c-IAP-2 was determined by reverse transcriptase-polymerase chain reaction (RT-PCR) and Western blotting in HaCaT cells transfected with pGFP-CAP18/LL-37. Specific DNAzymes were used to break the CAP18/LL-37 mRNA (DNAz-CAP18/LL-37). HaCaT cells transfected with pGFP-CAP18/LL-37 showed the upregulation of VEGF and c-IAP-2 mRNAs. Hypoxia-inducible factor-1alpha (HIF-1alpha) mRNA expression did not change du...Continue Reading
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