Mingye Li, Yuyu Dong, Zheng Wang, Yanjun Zhao, Yujie Dai and Baoxin Zhang
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Engineering hypoxia-responsive 6-aminonicotinamide prodrugs for on-demand NADPH depletion and redox manipulation†
Glucose-6-phosphate dehydrogenase (G6PD) is a promising target in cancer therapy. However, poor cellular uptake and off-target toxicity have impeded the clinical translation of a canonical G6PD inhibitor (6-aminonicotinamide/6AN). Here, we report a prodrug strategy to address this issue. The tailored 6AN prodrug contains an azo-bearing protection moiety. The hydrophobic prodrug showed increased cellular uptake than 6AN and was vulnerable to hypoxia, resulting in NAD(P)H quinone dehydrogenase 1 (NQO1)-triggered cleavage of azo bonds. Intriguingly, the prodrug showed configuration-dependent anti-cancer potency. Despite the lower thermodynamic stability, the cis isomer showed enhanced cellular uptake compared to the trans counterpart due to the increased aqueous solubility. Moreover, the boosted potency of the cis isomer compared to the trans isomer arose from the enhancement of NOQ1-catalyzed 6AN release under hypoxia, a hallmark of solid tumors. The discovery of hypoxia-responsive 6AN prodrugs in the current work opens up new avenues for G6PD-targeting cancer medicines.
期刊介绍:
Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C.Journal of Materials Chemistry B is a Transformative Journal and Plan S compliant. Example topic areas within the scope of Journal of Materials Chemistry B are listed below. This list is neither exhaustive nor exclusive:
Antifouling coatings
Biocompatible materials
Bioelectronics
Bioimaging
Biomimetics
Biomineralisation
Bionics
Biosensors
Diagnostics
Drug delivery
Gene delivery
Immunobiology
Nanomedicine
Regenerative medicine & Tissue engineering
Scaffolds
Soft robotics
Stem cells
Therapeutic devices