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. 2020 Nov 27;15:9469–9496. doi: 10.2147/IJN.S265876

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© 2020 Hoseini-Ghahfarokhi et al.

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(A) NGO-SS-mPEG in extracellular environment (low GSH level), (B) it is internalized into the tumor cell (high GSH level), (C) linkage is cleaved, and (D) DOX is released.

Note: Copyright ©2012. John Wiley and Sons. Reproduced from Wen H, Dong C, Dong H, et al. Engineered redox‐responsive PEG detachment mechanism in PEGylated nano‐graphene oxide for intracellular drug delivery. Small. 2012; 8 (5): 760–769.⁸¹