One‐Pot Synthesis of Dual Stimulus‐Responsive Degradable Hollow Hybrid Nanoparticles for Image‐Guided Trimodal Therapy |
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| Authors: | Koichiro Hayashi Takuma Maruhashi Michihiro Nakamura Wataru Sakamoto Toshinobu Yogo |
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| Affiliation: | 1. Division of Materials Research, Institute of Materials and Systems for Sustainability, Nagoya UniversityFro‐cho, Chikusa‐ku, Nagoya, Japan;2. Department of Organ Anatomy, Yamaguchi University Graduate School of Medicine, Ube, Yamaguchi, Japan |
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| Abstract: | Exploiting exogenous and endogenous stimulus‐responsive degradable nanoparticles as drug carriers can improve drug delivery systems (DDSs). The use of hollow nanoparticles may facilitate degradation, and combination of DDS with photodynamic therapy (PDT) and photothermal therapy (PTT) may enhance the anticancer effects of treatments. Here, a one‐pot synthetic method is presented for an anticancer drug (doxorubicin DOX]) and photosensitizer‐containing hollow hybrid nanoparticles (HNPs) with a disulfide and siloxane framework formed in response to exogenous (light) and endogenous (intracellular glutathione GSH]) stimuli. The hollow HNPs emit fluorescence within the near‐infrared window and allow for the detection of tumors in vivo by fluorescence imaging. Furthermore, the disulfides within the HNP framework are cleaved by intracellular GSH, deforming the HNPs. Light irradiation facilitates penetration of GSH into the HNP framework and leads to the collapse of the HNPs. As a result, DOX is released from the hollow HNPs. Additionally, the hollow HNPs generate singlet oxygen (1O2) and heat in response to light; thus, fluorescence imaging of tumors combined with trimodal therapy consisting of DDS, PDT, and PTT is feasible, resulting in superior therapeutic efficacy. Thus, this method may have several applications in imaging and therapeutics in the future. |
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| Keywords: | drug delivery systems hybrid nanoparticles stimulus‐responsive degradability theranostics |
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