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Title: Wirelessly Activated Nanotherapeutics for In Vivo Programmable Photodynamic-Chemotherapy of Orthotopic Bladder Cancer
Authors: Sun, Bowen
Bte Rahmat, Juwita Norasmara 
Kim, Han Joon 
Mahendran, Ratha 
Esuvaranathan, Kesavan 
Chiong, Edmund 
Ho, John S
Neoh, Koon Gee 
Zhang, Yong 
Keywords: bladder cancer
photodynamic therapy
targeted drug delivery
wireless photonics
Issue Date: 7-Apr-2022
Publisher: WILEY
Citation: Sun, Bowen, Bte Rahmat, Juwita Norasmara, Kim, Han Joon, Mahendran, Ratha, Esuvaranathan, Kesavan, Chiong, Edmund, Ho, John S, Neoh, Koon Gee, Zhang, Yong (2022-04-07). Wirelessly Activated Nanotherapeutics for In Vivo Programmable Photodynamic-Chemotherapy of Orthotopic Bladder Cancer. ADVANCED SCIENCE 9 (16). ScholarBank@NUS Repository.
Abstract: Photochemical internalization (PCI) is a promising intervention using photodynamic therapy (PDT) to enhance the activity of chemotherapeutic drugs. However, current bladder cancer treatments involve high-dose chemotherapy and high-irradiance PDT which cause debilitating side effects. Moreover, low penetration of light and drugs in target tissues and cumbersome light delivery procedures hinder the clinical utility of PDT and chemotherapy combination for PCI. To circumvent these challenges, a photodynamic-chemotherapy approach is developed comprising tumor-targeting glycosylated nanocarriers, coloaded with chlorin e6 (Ce6) and gemcitabine elaidate (GemE), and a miniaturized implantable wirelessly powered light-emitting diode (LED) as a light source. The device successfully delivers four weekly light doses to the bladder while the nanocarrier promoted the specific accumulation of drugs in tumors. This approach facilitates the combination of low-irradiance PDT (1 mW cm−2) and low-dose chemotherapy (≈1500× lower than clinical dose) which significantly cures and controls orthotopic disease burden (90% treated vs control, 35%) in mice, demonstrating a potential new bladder cancer treatment option.
ISSN: 2198-3844
DOI: 10.1002/advs.202200731
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