Nucleophile-triggered prodrug release from polymer hydrogels
Benjamin Klemm (TU Delft - Applied Sciences)
Magherita Tavasso (TU Delft - Applied Sciences)
Irene Piergentili (TU Delft - Applied Sciences)
Max Satijn (Student TU Delft)
Tobias G. Brevé (TU Delft - Applied Sciences)
Pouyan E. Boukany (TU Delft - Applied Sciences)
Rienk Eelkema (TU Delft - Applied Sciences)
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Abstract
We present a new method to obtain tertiary amine-based prodrugs with dual functionality, enabling (i) signal-triggered drug activation and (ii) covalent incorporation in polymer materials through a clickable azido-group unit on the molecular prodrug scaffold. Using nucleophilic substitution on an electron deficient azido-phenyl allyl bromide scaffold, we were able to obtain prodrugs from a variety of amine drug candidates. Subsequent drug activation was initiated by using S or N-terminal biomarker nucleophiles including amino acids, a neurotransmitter, and glutathione as chemical signals. Hydrogel scaffolds labelled with anti-cancer or antibiotic prodrugs were tested in aqueous and cellular media. Through this strategy, we achieved controlled drug release upon signal activation for in vitro cancer models with ∼100% wound closure inhibition of A549 small lung cancer cells. We anticipate that this new strategy for the development of responsive prodrug-conjugate incorporated materials will lead to further advancements in drug delivery and specialized therapeutics.
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