Table 1.
Differentially expressed miRNAs (DEmiRs).
The log2-fold change with zero value in the control conditions was arbitrarily set to one and the maximum log2-fold change value and those with zero value in the treatment conditions were arbitrarily set to the minimum log2-fold change value of minus one. The number of differentially expressed genes in each comparison is shown and the number of upregulated genes indicated with the upward arrow and downregulated genes indicated by downward arrow.
Fig 1.
Heat map of miRNAs significantly altered in AnAc-treated MCF-7 and MDA-MB-231 cells.
miRNAs significantly affected by AnAc were analyzed using Partek Genomic Suite™ to generate the heat map.
Table 2.
miRNAs upregulated by AnAc in both MCF-7 and MDA-MB-231 cells.
The genomic location of each miRNA was identified in miRAD http://bmi.ana.med.uni-muenchen.de/miriad/ [34]. Verified targets are those experimentally validated targets of the indicated miRNA as demonstrated by 3’-UTR luciferase reporter assay. Since many publications do not include whether the 5p or 3p arm of the miRNA was studied, if the sequence of the miRNA was provided, it was searched in miRBase.org to identify which arm was used in the target gene 3’-UTR luciferase reporter assay.
Table 3.
miRNAs downregulated by AnAc in MCF-7 cells.
The genomic location of each miRNA was identified in miRAD http://bmi.ana.med.uni-muenchen.de/miriad/ [34]. Verified targets are those experimentally validated targets of the indicated miRNA as demonstrated by 3’-UTR luciferase reporter assay. Since many publications do not include whether the 5p or 3p arm of the miRNA was studied, if the sequence of the miRNA was provided, it was searched in miRBase.org to identify which arm was used in the target gene 3’-UTR luciferase reporter assay.
Table 4.
miRNAs upregulated by AnAc MCF-7 cells.
The genomic location of each miRNA was identified in miRAD http://bmi.ana.med.uni-muenchen.de/miriad/ [34]. Verified targets are those experimentally validated targets of the indicated miRNA as demonstrated by 3’-UTR luciferase reporter assay in the cited reference. Since many publications do not include whether the 5p or 3p arm of the miRNA was studied, if the sequence of the miRNA was provided, it was searched in miRBase.org to identify which arm was used in the target gene 3’-UTR luciferase reporter assay.
Table 5.
miRNAs downregulated by AnAc in MDA-MB-231 cells.
The genomic location of each miRNA was identified in miRAD http://bmi.ana.med.uni-muenchen.de/miriad/ [34]. Verified targets are those experimentally validated targets of the indicated miRNA as demonstrated by 3’-UTR luciferase reporter assay. Since many publications do not include whether the 5p or 3p arm of the miRNA was studied, if the sequence of the miRNA was provided, it was searched in miRBase.org to identify which arm was used in the target gene 3’-UTR luciferase reporter assay.
Fig 2.
Enrichment analysis of miRNA-seq data.
Differentially expressed genes were identified in pairwise comparisons: MCF-7 AnAc vs. MDA-MB-231 AnAc using the tuxedo suite of programs including cufflink-cuffdiff2. The Venn diagrams show the number of common and differentially expressed genes significantly downregulated (A) and upregulated (B). Pathway analysis was performed using GeneGo Pathways Software (MetaCoreTM). The pathways identified for each comparison are listed in the order provided by MetaCoreTM analysis.
Table 6.
miRNAs upregulated by AnAc in MDA-MB-231 cells.
The genomic location of each miRNA was identified in miRAD http://bmi.ana.med.uni-muenchen.de/miriad/ [34]. Verified targets are those experimentally validated targets of the indicated miRNA as demonstrated by 3’-UTR luciferase reporter assay. Since many publications do not include whether the 5p or 3p arm of the miRNA was studied, if the sequence of the miRNA was provided, it was searched in miRBase.org to identify which arm was used in the target gene 3’-UTR luciferase reporter assay.
Fig 3.
qPCR analysis of select AnAc-regulated miRNA expression.
MCF-7 and MDA-MB-231 cells were grown in hormone-depleted medium for 48 h prior to 6 h treatment with 13.5 or 35 μM AnAc. A. qPCR using TaqMan assays for miR-378g, miR-612, miR-20b-5p, and miR-20b-3p was performed using U48 as normalizer. B. CT values for miR-20b-5p and miR-20b-3p expression. miR-20b-5p was not detected in MDA-MB-231 (CT values ‘undetermined). For both A and B: Values are the mean ± SEM of triplicates in one experiment for MCF-7 cells and are the mean ± SEM of two independent experiments for MDA-MB-231 cells.
Fig 4.
Overexpression of miR-612 inhibits cell viability and inhibition of miR-612 inhibits AnAc’s anti-proliferative activity.
MCF-7 and MDA-MB-231 cells were transfected with miR-Control (negative control), miR-612 mimic, anti-miR-Control (negative control), or anti-miR-612 for 24 h prior to 48 h treatment with EtOH (vehicle control) or 13.5 μM (MCF-7) or 35 μM (MDA-MB-231) AnAc. miR-612 expression was measured by qPCR relative to RNU48 in the transfected, untreated cells 72 h after transfection to match the time of the MTT assay (B). Values are the average of triplicate determinations ± SEM in one transfection and are relative to the appropriate transfection control as indicated. Cell viability was evaluated by MTT assay (B). Values for the MTT assay are relative to negative controls and are the avg ± SEM of 2 separate experiments. AnAc is proposed to affect cell viability through miR-612 (C).
Fig 5.
qPCR analysis of mRNA targets of AnAc-downregulated miRNAs.
MCF-7 and MDA-MB-231 cells were grown in hormone-depleted medium for 48 h prior to 6 h treatment with 13.5 or 35 μM AnAc. qPCR was performed using GAPDH as normalizer. Values are the mean ± SEM of triplicates in one experiment for MCF-7 cells and are the mean ± SEM of two independent experiments for MDA-MB-231 cells.