NIR imaging-guided combined photodynamic therapy and chemotherapy by a pH-responsive amphiphilic polypeptide prodrug. (21st December 2016)

• Record Type: Journal Article
• Authors: Ruan, Zheng; Liu, Le; Jiang, Wei; Li, Shuya; Wang, Yucai; Yan, Lifeng
• Is Part Of: Biomaterials science. Volume 5:Number 2(2017:Feb.)
• Page Start: 313
• Page End: 321
• Publication Date: 2016-12-21
• Subjects: Biomedical materials -- Periodicals; 610.28
• DOI: 10.1039/c6bm00787b
• Languages: English
• ISSNs: 2047-4830

Abstract

Abstract : Polypeptide micelles conjugated with DOX and a NIR photosensitizer can be used as imaging-guided PDT agents for cancer theranostics. Abstract : pH-Sensitive doxorubicin conjugated polymeric micelles entrapped with near infrared (NIR) photosensitizer BODIPY (which works as an imaging agent at the same time) were designed and synthesized by ring opening polymerization of N -carboxyanhydride with mPEG-NH2 as the initiator, following reaction with doxorubicin to form the hydrazone-bond linker for pH responsiveness. Then the NIR dye (BODIPY) was loaded in the micelles for both bioimaging and photodynamic therapy (PDT). A significant cytotoxicity of NIR imaging-guided combined PDT and chemotherapy could be found by MTT assays, which was also confirmed with a fluorescence microscope, indicating a new kind of polymeric nanoparticle for potential theranostic treatment of cancers. In addition, the energy density of the laser for the PDT is extremely low.