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Finger and AT hook domain ontaining (ZFAT) gene. The epigenetic [2] and Finger and AT hook domain ontaining (ZFAT) gene. The epigenetic [2] and transcription BPN14770 Formula factormediated regulation [3] of miRNA genes could underlie the molecular mechanism of ROSmediated regulation of miRNAs in ARPE19 cells. Curcumin along with other dietary components have been reported to alter the expression profiles of miRNAs in other tissues. Inside the human pancreatic cell line, curcumin has been shown to substantially up and downregulate 11 and 18 miRNAs, respectively [5]. Constant with those data, in our study, curcumin upregulated miR103, miR22, andmiR23b and downregulated miR195, miR15b, miR196, and miR92. Within the human multidrugresistant adenocarcinoma cell line A549DDP, curcumin altered miRNA expression and substantially downregulated the expression of miR186 [24], a unfavorable regulator on the proapoptotic purinergic P2X7 receptor [25], which can be also constant with our outcome. Curcumin was shown to considerably downregulate the H 2O2induced expression of miR302 cluster in ARPE19 cells. MiR302 has been reported to inhibit numerous epigenetic regulators, which includes AOF12, methylCpG binding proteins 1 and 2, and DNA (cytosine5)methyltransferase 1, that induce international DNA demethylation and subsequently activate transcription factors Oct4, Sox2, and Nanog [26]. The treatment of ARPE19 cells with H2O2 in our experiment induced miR26b, miR15b, and miR9, and that induction was considerably suppressed by curcumin. The oxidantinduced expression of those three miRNAs showed consistency with the result shown in ARPE19 cells treated having a retinoicMolecular Vision 2013; 19:544560 molvis.orgmolvisv195442013 Molecular VisionFigure eight. Curcumin attenuated hydrogen peroxide (H2O2)induced expression of angiotensin II kind 1 receptor, nuclear factorkappa B, and vascular endothelial development factor at the mRNA (A) and protein (B) levels in ARPE19 cells. The mRNA and protein measurements have been carried out with quantitative realtime polymerase chain reaction (qRTPCR) and western blotting, respectively. Cells had been treated with curcumin and hydrogen peroxide (H 2O2) for six and 18 h, respectively. Within the curcH2O2 group, cells had been treated with six h followed by insult with 200 M H2O2 for 18 h; cells had been washed with fresh media inbetween the curcumin and H2O2 remedies. Representative western blots of angiotensin II sort 1 receptor (AT1R), nuclear factorkappa B (NFB), and actin, and densitometric analysis of the protein levels are shown within the upper and reduced panels, respectively (B). Information represent imply EM from 3 (for western) or 4 (for qRTPCR) separate samples. p0.05 versus handle, p0.001 versus control, #p0.001 versus H2O2.acid derivative (4HPR), which induces ROS generation [27]. MiR21 has been shown to guard cardiac myocytes against H2O2induced injury by way of targeting the programmed cell death protein four and activator protein1 pathway [28]. Our data also showed that miR21 was sensitive to H2O2 stimulation, and expression of miR21 was drastically downregulated by curcumin pretreatment. The miR172 cluster is expressed in human retinoblastoma, and upon deletion of Rb family members members, miR172 overexpression results in explosive improvement of retinoblastoma [29]. In our investigation, miR17 and miR92 with the cluster have been induced by H2O2mediated strain, whereas curcumin treatments considerably downregulated the expression on the cluster. The actions of curcumin and resveratrol, a structurallyrelated polyphenolic compound, are related in some respects [30,31]. Curcumin and.