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Evolution of nanoparticles as innovative drug delivery systems. pH-sensitive pegylated nano drug delivery systems (HA-mPEG-Cis NPs) are able to target CD44+ cells; Gold nanoparticles (AuNPs) find application in photodynamic therapy (PDT); Lipid-based NPs; Nanoemulsions (NEs) are a system to deliver hydrophobic drugs and hydrophilic or hydrophobic compounds.
