Publication: A novel visible light responsive nanosystem for cancer treatment
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2017-09-19
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Royal Society of Chemistry
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A novel singlet-oxygen sensitive drug delivery nanocarrier able to release their cargo after exposure to visible (Vis) light of a common lamp is presented. This nanodevice is based on mesoporous silica nanoparticles (MSN) decorated with porphyrin-caps grafted via reactive oxygen species (ROS)-cleavable linkages. In presence of Vis light the porphyrinnanocaps produce singlet oxygen molecules that break the sensitive-linker, which triggers pore uncapping and therefore allows the release of the entrapped cargo (topotecan, TOP). This new system takes advantage of thE non-toxicity and greater penetration capacity of Vis radiation and a double antitumor effect due to the drug release and the ROS production. In vitro tests with HOS osteosarcoma cancer cells reveal that TOP is able to be released in a controlled fashion inside the tumor cells. This research work constitutes a proof of concept that opens up promising expectations in the seeking for new alternatives for the treatment of cancer.
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