Targeted, stimulus-responsive DNA nanogels hold considerable promise for cancer therapeutics. To expand their functionality including thermoresponsiveness, here, multifunctional DNA nanogels are developed for potential application toward cancer-targeted delivery and stimuli-responsive release of cancer therapeutics. Three types of functionalized DNA nanobuilding units are formed into DNA nanogels of ≈200 nm via sequence-dependent self-assembly. The sequence-dependent assembly of nanobuilding units is precisely designed for controlled assembly and thermal disassembly at physiological temperatures. The supramolecular structure exhibits multifunctionalities including temperature-induced disassembly, aptamer-mediated cancer cell targeting, and light-triggered temperature increase. The nanogels support co-loading of cancer therapeutics including anti-sense oligonucleotides and doxorubicin along with stimuli-responsive release of loaded drugs through temperature-responsive structural disassembly and pH-responsive deintercalation. The nanogels exhibit efficient aptamer-mediated cancer-specific intracellular delivery and combinational anticancer effects upon light triggering. The developed DNA nanogels, thus, constitute potential noncationic nanovectors for targeted delivery of combinational cancer therapeutics.
Bibliographical noteFunding Information:
This study was supported by the Basic Science Research Program (No. 2018R1D1A1A02085552) through the National Research Foundation of Korea (NRF) funded by the Korean Government. This research was conducted with the generous financial support of the Youlchon Foundation (Nongshim Corporation and its affiliated companies) in Korea. The work was supported in part by the Brain Korea 21 (BK21) PLUS program. K.Y. was supported by the NRF‐2017‐Global Ph.D. Fellowship Program.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry