HuR (ELAVL1) Stabilizes SOX9 mRNA and Promotes Migration and Invasion in Breast Cancer Cells.
Jesús Morillo-BernalPatricia Pizarro-GarcíaGema Moreno-BuenoAmparo CanoMaría J MazónPilar ErasoFrancisco PortilloPublished in: Cancers (2024)
RNA-binding proteins play diverse roles in cancer, influencing various facets of the disease, including proliferation, apoptosis, angiogenesis, senescence, invasion, epithelial-mesenchymal transition (EMT), and metastasis. HuR, a known RBP, is recognized for stabilizing mRNAs containing AU-rich elements (AREs), although its complete repertoire of mRNA targets remains undefined. Through a bioinformatics analysis of the gene expression profile of the Hs578T basal-like triple-negative breast cancer cell line with silenced HuR, we have identified SOX9 as a potential HuR-regulated target. SOX9 is a transcription factor involved in promoting EMT, metastasis, survival, and the maintenance of cancer stem cells (CSCs) in triple-negative breast cancer. Ribonucleoprotein immunoprecipitation assays confirm a direct interaction between HuR and SOX9 mRNA. The half-life of SOX9 mRNA and the levels of SOX9 protein decreased in cells lacking HuR. Cells silenced for HuR exhibit reduced migration and invasion compared to control cells, a phenotype similar to that described for SOX9-silenced cells.
Keyphrases
- transcription factor
- binding protein
- cell cycle arrest
- induced apoptosis
- epithelial mesenchymal transition
- stem cells
- endoplasmic reticulum stress
- cell death
- signaling pathway
- dna binding
- endothelial cells
- dna damage
- squamous cell carcinoma
- transforming growth factor
- genome wide identification
- high throughput
- cell proliferation
- gold nanoparticles
- climate change
- dna methylation
- sensitive detection
- papillary thyroid