RT Journal Article T1 Overcoming the stability, toxicity, and biodegradation challenges of tumor stimuli-responsive inorganic nanoparticles for delivery of cancer therapeutics A1 Paris, J.L. A1 Baeza, Alejandro A1 Vallet Regí, María Dulce Nombre AB Introduction: Stimuli-responsive nanomaterials for cancer therapy have attracted much interest recently due to their potential for improving the current standard of care. Different types of inorganic nanoparticles are widely employed for the development of these strategies, but in some cases safety concerns hinder their clinical translation. This review aims to provide an overview of the challenges that inorganic nanoparticles faceregarding their stability, toxicity and biodegradability, as well as the strategies that have been proposed to overcome them.Areas covered: The available information about the in vitro and in vivo biocompatibility, as well as the biodegradability of the following nanoparticles is presented and discussed: superparamagnetic iron oxide nanoparticles, gold nanoparticles, graphene and mesoporous nanoparticles made of silicon or silicon oxide. The toxicology of inorganic nanoparticles is greatly affected by many physicochemical parameters, andtheir surface modification emerges as the main intervention to improve their biocompatibility and tailor their performance for specific biomedical applications.Expert opinion: Even though many different studies have been performed regarding the biological behavior of inorganic nanoparticles, long-term in vivo data is still scarce, limiting our capacity to evaluate the proposed nanomaterials for clinical use. The role of biodegradability in different therapeutic contexts is also discussed. PB Informa Healthcare SN 1742-5247 YR 2019 FD 2019-09-03 LK https://hdl.handle.net/20.500.14352/13522 UL https://hdl.handle.net/20.500.14352/13522 LA eng NO RESEARCHER ID D-9318-2017 (Juan Luis Paris de la Fuente)ORCID 0000-0001-8950-283X (Juan Luis Paris de la Fuente)RESEARCHER ID K-8193-2014 (Alejandro Baeza)ORCID 0000-0002-2026-6266 (Alejandro Baeza)RESEARCHER ID M-3378-2014 (María Vallet Regí)ORCID 0000-0002-6104-4889 (María Vallet Regí) NO Unión Europea. H2020 DS Docta Complutense RD 4 may 2024