Abstract

Low drug loading, premature drug leakage, and intratumoral genetic heterogeneity are three main challenges that hinder the successful nanotherapeutics-based oncotherapy, as they provide insufficient therapeutic efficacy, systematic adverse effects, and multidrug resistance, respectively. To address these challenges, we herein develop near-infrared (NIR) laser-sensitive DNA-modified hollow mesoporous silica nanoparticles (HMSNs) with dual cargo loading for chemo-photothermal combined treatment of tumors. Starting from the zeolitic imidazolate framework-8 (ZIF-8) template, a layer of mesoporous silica is coated on ZIF-8 (ZIF-8@MSNs), and subsequently the template is self-degraded under acidic conditions to obtain HMSNs. It is demonstrated that the as-made HMSNs possesses a well-defined morphology, large hollow cavities, and abundant mesoporous structures. After loading of indocyanine green into HMSNs’ core (ICG@HMSNs), the DNA strands, which are composed by sequential cytosine-guanine (CG) base pairs, are t...

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