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Interplay of SOX transcription factors and microRNAs in the brain under physiological and pathological conditions

Neural Regeneration Research 2022年第11期17卷 2325-2334页

作者： Milena Stevanovic danijela Stanisavljevic Ninkovic Marija Mojsin danijela drakulic Marija Schwirtlich Laboratory for Human Molecular Genetics Institute of Molecular Genetics and Genetic EngineeringUniversity of BelgradeBelgradeSerbia University of Belgrade Faculty of BiologyBelgradeSerbia Serbian Academy of Sciences and Arts BelgradeSerbia

Precise tuning of gene expression,accomplished by regulato ry networks of transcription factors,epigenetic modifiers,and microRNAs,is crucial for the proper neural development and function of the brain cells.The SOX transcription factors are involved in regulating diverse cellular processes during embryonic and adult neurogenesis,such as maintaining the cell stemness,cell prolife ration,cell fate decisions,and terminal diffe rentiation into neurons and glial cells.MicroRNAs represent a class of small non-coding RNAs that play important roles in the regulation of gene expression.Together with other gene regulatory factors,microRNAs regulate different processes during neurogenesis and orchestrate the spatial and temporal expression important for neurodevelopment.The emerging data point to a complex regulatory network between SOX transcription factors and microRNAs that govern distinct cellular activities in the developing and adult brain.Deregulated SOX/mic roRNA interplay in signaling pathways that influence the homeostasis and plasticity in the brain has been revealed in various brain pathologies,including neurodegenerative disorders,traumatic brain injury,and cancer.Therapeutic strategies that target SOX/microRNA interplay have emerged in recent years as a promising tool to target neural tissue regeneration and enhance neuro restoration.N umerous studies have confirmed complex intera ctions between microRNAs and SOX-specific mRNAs regulating key features of glioblastoma.Keeping in mind the crucial roles of SOX genes and microRNAs in neural development,we focus this review on SOX/microRNAs interplay in the brain during development and adulthood in physiological and pathological conditions.Special focus was made on their interplay in brain pathologies to summarize current knowledge and highlight potential future development of molecular therapies.

关键词： dysregulation of miRNA expression glioblastoma gliogenesis glioma stem cells ischemic stroke neural stem cells neural tissue regeneration neurodegenerative diseases neurodevelopment neurogenesis SOX/miRNA interplay traumatic brain injury

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SOX transcription factors and glioma stem cells:Choosing between stemness and differentiation

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World Journal of Stem Cells 2021年第10期13卷 1417-1445页

作者： Milena Stevanovic Natasa Kovacevic-Grujicic Marija Mojsin Milena Milivojevic danijela drakulic Laboratory for Human Molecular Genetics Institute of Molecular Genetics and Genetic EngineeringUniversity of BelgradeBelgrade 11042Serbia Chair Biochemistry and Molecular Biology Faculty of BiologyUniversity of BelgradeBelgrade 11158Serbia Department of Chemical and Biological Sciences Serbian Academy of Sciences and ArtsBelgrade 11000Serbia

Glioblastoma(GBM)is the most common,most aggressive and deadliest brain tumor.Recently,remarkable progress has been made towards understanding the cellular and molecular biology of gliomas.GBM tumor initiation,progression and relapse as well as resistance to treatments are associated with glioma stem cells(GSCs).GSCs exhibit a high proliferation rate and self-renewal capacity and the ability to differentiate into diverse cell types,generating a range of distinct cell types within the tumor,leading to cellular heterogeneity.GBM tumors may contain different subsets of GSCs,and some of them may adopt a quiescent state that protects them against chemotherapy and radiotherapy.GSCs enriched in recurrent gliomas acquire more aggressive and therapy-resistant properties,making them more malignant,able to rapidly spread.The impact of SOX transcription factors(TFs)on brain tumors has been extensively studied in the last decade.Almost all SOX genes are expressed in GBM,and their expression levels are associated with patient prognosis and survival.Numerous SOX TFs are involved in the maintenance of the stemness of GSCs or play a role in the initiation of GSC differentiation.The fine-tuning of SOX gene expression levels controls the balance between cell stemness and differentiation.Therefore,innovative therapies targeting SOX TFs are emerging as promising tools for combatting GBM.Combatting GBM has been a demanding and challenging goal for decades.The current therapeutic strategies have not yet provided a cure for GBM and have only resulted in a slight improvement in patient survival.Novel approaches will require the fine adjustment of multimodal therapeutic strategies that simultaneously target numerous hallmarks of cancer cells to win the battle against GBM.

关键词： Glioblastoma SOX transcription factors Glioma stem cells Stemness Differentiation

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