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Updated: Aug 22, 2025
Affordable Oxygen Microscopy-Assisted Biofabrication of Multicellular Spheroids
Published on: April 6, 2022
Oxygen self-supplied upconversion nanoplatform loading cerium oxide for amplified photodynamic therapy of hypoxic
Yunjian Xu1,2,3, Kexin Wang1, Zhenjiang Chen1
1Key Laboratory of Optoelectronic Devices and Systems of Guangdong Province & Ministry of Education, College of Physics and Optoelectronic Engineering Shenzhen University, Shenzhen, Guangdong Province, 518060, P. R. China. liulw@szu.edu.cn.
Abstract:
Photodynamic therapy (PDT) has been widely used in preclinical trials for treating various tumors. However, the hypoxic environment of tumors and the limited penetration depth of ultraviolet light severely weaken the PDT effect. To solve the above problems, a near-infrared (NIR) light-triggered oxygen (O2) self-supplied phototherapeutic platform (UCNPs/CeO2/Ce6/BSA) for amplified PDT performance against solid tumors by alleviating tumor hypoxia has been rationally developed. The platform has excellent stability and can continuously decompose H2O2 for sustained O2 supply to synergize 1O2 generation, thus inducing an enhanced mortality rate (59%) of ID8 cells in vitro under hypoxic + H2O2 conditions. The growth of solid tumors was effectively inhibited and the mouse survival rate was dramatically enhanced via a superior PDT therapeutic performance. This reported study facilitated the positive development of multifunctional diagnosis and treatment platforms under long-wavelength excitation for O2 self-supplied tumor treatments.
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