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ABSTRACT:
PROVIDER: PRJNA269750 | ENA |
REPOSITORIES: ENA
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Project description:Background: The acquisition of drug resistance is one of the most malignant phenotypes of cancer. MicroRNAs (miRNAs) have been implicated in various types of cancers, but its role in taxane-resistance of prostate cancer remains poorly understood. Methods: In order to identify miRNAs related to taxane-resistance, miRNA profiling was performed using prostate cancer PC3 cells and paclitaxel-resistant PC3 cell lines established from PC3 cells. Microarray analysis of mRNA expression was also conducted to search for potential target genes of miRNA. The effects of ectopic expression of miRNA on cell growth, tubulin polymerization, drug sensitivity and apoptotic signaling pathway were investigated in a paclitaxel-resistant PC3 cell line. Results: The expression of miR-130a was down-regulated in all paclitaxel-resistant cell lines compared with parental PC3 cells. Based on mRNA microarray analysis, we identified SLAIN1 and CAV2 as potential target genes for miR-130a. Transfection with a miR-130a precursor into a paclitaxel-resistant cell line suppressed cell growth and increased the sensitivity to paclitaxel. Lastly, ectopic expression of miR-130a did not affect the polymerized tubulin level, but activated apoptotic signaling through activation of caspase-8. Conclusion: These results suggested that miR-130a may be involved in the paclitaxel-resistance and could be a therapeutic target for taxane-resistant prostate cancer.
2015-07-31 | GSE64013 | GEO
Project description:Background: The acquisition of drug resistance is one of the most malignant phenotypes of cancer. MicroRNAs (miRNAs) have been implicated in various types of cancers, but its role in taxane-resistance of prostate cancer remains poorly understood. Methods: In order to identify miRNAs related to taxane-resistance, miRNA profiling was performed using prostate cancer PC3 cells and paclitaxel-resistant PC3 cell lines established from PC3 cells. Microarray analysis of mRNA expression was also conducted to search for potential target genes of miRNA. The effects of ectopic expression of miRNA on cell growth, tubulin polymerization, drug sensitivity and apoptotic signaling pathway were investigated in a paclitaxel-resistant PC3 cell line. Results: The expression of miR-130a was down-regulated in all paclitaxel-resistant cell lines compared with parental PC3 cells. Based on mRNA microarray analysis, we identified SLAIN1 and CAV2 as potential target genes for miR-130a. Transfection with a miR-130a precursor into a paclitaxel-resistant cell line suppressed cell growth and increased the sensitivity to paclitaxel. Lastly, ectopic expression of miR-130a did not affect the polymerized tubulin level, but activated apoptotic signaling through activation of caspase-8. Conclusion: These results suggested that miR-130a may be involved in the paclitaxel-resistance and could be a therapeutic target for taxane-resistant prostate cancer.
2015-07-31 | GSE64012 | GEO
Project description:Background: The acquisition of drug resistance is one of the most malignant phenotypes of cancer. MicroRNAs (miRNAs) have been implicated in various types of cancers, but its role in taxane-resistance of prostate cancer remains poorly understood. Methods: In order to identify miRNAs related to taxane-resistance, miRNA profiling was performed using prostate cancer PC3 cells and paclitaxel-resistant PC3 cell lines established from PC3 cells. Microarray analysis of mRNA expression was also conducted to search for potential target genes of miRNA. The effects of ectopic expression of miRNA on cell growth, tubulin polymerization, drug sensitivity and apoptotic signaling pathway were investigated in a paclitaxel-resistant PC3 cell line. Results: The expression of miR-130a was down-regulated in all paclitaxel-resistant cell lines compared with parental PC3 cells. Based on mRNA microarray analysis, we identified SLAIN1 and CAV2 as potential target genes for miR-130a. Transfection with a miR-130a precursor into a paclitaxel-resistant cell line suppressed cell growth and increased the sensitivity to paclitaxel. Lastly, ectopic expression of miR-130a did not affect the polymerized tubulin level, but activated apoptotic signaling through activation of caspase-8. Conclusion: These results suggested that miR-130a may be involved in the paclitaxel-resistance and could be a therapeutic target for taxane-resistant prostate cancer. Human hormone-refractory prostate cancer PC3 cells were cultured in RPMI1640 medium supplemented with 10 % of fetal bovine serum, 100 units/ml of penicillin and 100 ug/ml of streptomycin. Paclitaxel-resistant PC3PR20, PC3PR70 and PC3PR200 cells, which respectively could proliferate in the presence of 20, 70 and 200 nM of paclitaxel (Sigma-Aldrich, St. Louis, MO, USA), were previously established from PC3 cells by a stepwise increase of paclitaxel in the culture medium (Kojima et al, 2010, Prostate 70: 1501-12).
2015-07-31 | E-GEOD-64012 | biostudies-arrayexpress
Project description:Background: The acquisition of drug resistance is one of the most malignant phenotypes of cancer. MicroRNAs (miRNAs) have been implicated in various types of cancers, but its role in taxane-resistance of prostate cancer remains poorly understood. Methods: In order to identify miRNAs related to taxane-resistance, miRNA profiling was performed using prostate cancer PC3 cells and paclitaxel-resistant PC3 cell lines established from PC3 cells. Microarray analysis of mRNA expression was also conducted to search for potential target genes of miRNA. The effects of ectopic expression of miRNA on cell growth, tubulin polymerization, drug sensitivity and apoptotic signaling pathway were investigated in a paclitaxel-resistant PC3 cell line. Results: The expression of miR-130a was down-regulated in all paclitaxel-resistant cell lines compared with parental PC3 cells. Based on mRNA microarray analysis, we identified SLAIN1 and CAV2 as potential target genes for miR-130a. Transfection with a miR-130a precursor into a paclitaxel-resistant cell line suppressed cell growth and increased the sensitivity to paclitaxel. Lastly, ectopic expression of miR-130a did not affect the polymerized tubulin level, but activated apoptotic signaling through activation of caspase-8. Conclusion: These results suggested that miR-130a may be involved in the paclitaxel-resistance and could be a therapeutic target for taxane-resistant prostate cancer. Human hormone-refractory prostate cancer PC3 cells were cultured in RPMI1640 medium supplemented with 10 % of fetal bovine serum, 100 units/ml of penicillin and 100 ug/ml of streptomycin. Paclitaxel-resistant PC3PR20, PC3PR70 and PC3PR200 cells, which respectively could proliferate in the presence of 20, 70 and 200 nM of paclitaxel (Sigma-Aldrich, St. Louis, MO, USA), were previously established from PC3 cells by a stepwise increase of paclitaxel in the culture medium (Kojima et al, 2010, Prostate 70: 1501-12).
2015-07-31 | E-GEOD-64013 | biostudies-arrayexpress
Project description:miR-130a activates apoptotic signaling through activation of caspase-8 in taxane-resistant prostate cancer cells [miRNA]
| PRJNA269756 | ENA
Project description:miR-130a activates apoptotic signaling through activation of caspase-8 in taxane-resistant prostate cancer cells [total RNA]
| PRJNA269755 | ENA
Project description:Micro RNAs (miRNAs) miR-130a, miR-203 and miR-205 are jointly downregulated in prostate cancer and act as repressors of AR-signaling. MiRNAs are small non-coding RNAs that regulate the expression of specific mRNA targets mainly by translational repression, mRNA deadenylation or cleavage. Reconstitution of these lost miRNAs in the LNCaP PCa cell line cause morphology changes, growth arrest, and apoptosis, increasing when the miRNAs were co-expressed. Bioinformatic target prediction, mRNA expression and protein expression analysis upon overexpression of these miRNAs congruently identified targets known to be overexpressed in PCa and to be involved in AR trans-activation. This series profiles loss in mRNA expression in LNCaP cells transfected with one of the three miRNAs miR-130a, miR-203 and miR-205 compared to LNCaP cells transfected with a scramble miRNA. We analyzed three arrays each for miR-130a, miR-203, miR-205, and a scramble miRNA.
2012-03-08 | E-GEOD-17315 | biostudies-arrayexpress
Project description:Micro RNAs (miRNAs) miR-130a, miR-203 and miR-205 are jointly downregulated in prostate cancer and act as repressors of AR-signaling. MiRNAs are small non-coding RNAs that regulate the expression of specific mRNA targets mainly by translational repression, mRNA deadenylation or cleavage. Reconstitution of these lost miRNAs in the LNCaP PCa cell line cause morphology changes, growth arrest, and apoptosis, increasing when the miRNAs were co-expressed. This series identifies direct targets of miR-130a, miR-203, and miR-205 by AGO2-RNA co-immunoprecipitation as described by (Beitzinger et al. 2007) upon miRNA reconstitution in LNCaP cells and analyzing AGO2-bound mRNAs using Affymetrix Genechips. Relative levels of AGO2 bound versus total RNA expression were compared between miRNA reconstituted and miR-scr transfected samples. Three arrays each for AGO2-bound RNA upon reconstitution of miR-130a, miR-203, miR-205, a scramble miRNA, and three arrays each for total RNA upon reconstitution of miR-130a, miR-203, miR-205, a scramble miRNA.
2012-03-08 | E-GEOD-22979 | biostudies-arrayexpress
Project description:To study the effect of miR-130a in prostate cancer, PC3 cells overexpressing miR-130a were analyzed for global gene expression.
2017-03-10 | GSE80750 | GEO
Project description:This SuperSeries is composed of the following subset Series: GSE17315: mRNA expression upon reconstitution of miR-130a, miR-203 and miR-205 in prostate cancer cell line LNCaP GSE17317: miRNA expression in LNCaP, PC3, Du-145 and RWPE-1 cell lines GSE22979: Profiling of direct mRNA targets of miR-130a, miR-203 and miR-205 in prostate cancer cell line LNCaP Refer to individual Series
2012-03-07 | E-GEOD-17362 | biostudies-arrayexpress