Targeting the lipid metabolic axis ACSL/SCD in colorectal cancer progression by therapeutic miRNAs: miR-19b-1 role |
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Affiliation: | 2. Bioinformatics Unit, Instituto Madrileño de Estudios Avanzados (IMDEA) Food Institute, CEI UAM+CSIC, Madrid, Spain;4. Biostatistics Unit, Instituto Madrileño de Estudios Avanzados (IMDEA) Food Institute, CEI UAM+CSIC, Madrid, Spain |
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Abstract: | An abnormal acyl-CoA synthetase/stearoyl-CoA desaturase (ACSL/SCD) lipid network fuels colon cancer progression, endowing cells with invasive and migratory properties. Therapies against this metabolic network may be useful to improve clinical outcomes. Because micro-RNAs (miRNAs/miRs) are important epigenetic regulators, we investigated novel miRNAs targeting this pro-tumorigenic axis; hence to be used as therapeutic or prognostic miRNAs. Thirty-one putative common miRNAs were predicted to simultaneously target the three enzymes comprising the ACSL/SCD network. Target validation by quantitative RT-PCR, Western blotting, and luciferase assays showed miR-544a, miR-142, and miR-19b-1 as major regulators of the metabolic axis, ACSL/SCD. Importantly, lower miR-19b-1 expression was associated with a decreased survival rate in colorectal cancer (CRC) patients, accordingly with ACSL/SCD involvement in patient relapse. Finally, miR-19b-1 regulated the pro-tumorigenic axis, ACSL/SCD, being able to inhibit invasion in colon cancer cells. Because its expression correlated with an increased survival rate in CRC patients, we propose miR-19b-1 as a potential noninvasive biomarker of disease-free survival and a promising therapeutic miRNA in CRC. |
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Keywords: | micro-ribonucleic acid colorectal tumors patient relapse invasiveness molecular biology lipid and lipoprotein metabolism fatty acid/metabolism clinical studies acyl-CoA synthetase/stearoyl-CoA desaturase |
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