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Understanding autophagy role in cancer stem cell development

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Abstract

Cancer stem cells (CSCs) are a small subpopulation of immature cells located in the tumor mass. These cells are responsible for tumor development, proliferation, resistance and spreading. CSCs are characterized by three unique features: the ability to self-renew, differentiation and tumor formation. CSCs are similar to stem cells, but they differ in the malignant phenotype. CSCs become immortal and survive harsh environmental conditions such as hypoxia, starvation and oxidative stress. However, this harsh tumor microenvironment induces the activation of autophagy, which further increases the CSCs stemness profile, and all these features further increase tumorigenicity and metastasis capacity. Autophagy is induced by the extracellular and cellular microenvironment. Hypoxia is one of the most common factors that highly increases the activity of autophagy in CSCs. Therefore, hypoxia-induced autophagy and CSCs proliferation should be elucidated in order to find a novel cure to defeat cancer cells (CSCs and non-CSCs). The remaining challenges to close the gap between the laboratory bench and the development of therapies, to use autophagy against CSCs in patients, could be addressed by adopting a 3D platform to better-mimic the natural environment in which these cells reside. Ultimately allowing to obtain the blueprints for bioprocess scaling up and to develop the production pipeline for safe and cost-effective autophagy-based novel biologics.

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    Authors and Affiliations

    1. Instituto de Investigación Sanitaria Hospital La Fe, Valencia, Spain

      Cristóbal Aguilar-Gallardo

    2. Department of Chemical Enginering, Facultad de Ingeniería y Ciencias, Universidad de La Frontera, Temuco, Chile

      Mauricio Zamorano & Jorge G. Farias

    3. Doctor in Medicine, Universitat de València, Valencia, Spain

      Karol De Aguiar Quevedo

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    Authorship Conception and design: CAG, MZ. Analysis and interpretation of data: JF, KDAQ. Drafting the article: CAG, KDAQ, MZ. Final approval of the version to be published: MZ, JF.

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    Aguilar-Gallardo, C., Zamorano, M., Farias, J.G. et al. Understanding autophagy role in cancer stem cell development. Mol Biol Rep 49, 6741–6751 (2022). https://doi.org/10.1007/s11033-022-07299-z

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