Unravelling "off-target" effects of redox-active polymers and polymer multilayered capsules in prostate cancer cells
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
Redox-active polymers and carriers are oxidizing nanoagents that can potentially trigger intracellular off-target effects. In the present study, we investigated the occurrence of off-target effects in prostate cancer cells following exposure to redox-active polymer and thin multilayer capsules with different chemical properties. We show that, depending on the intracellular antioxidant capacity, thiol-functionalized poly(methacrylic acid), PMASH triggers cell defense responses/perturbations that result in off-target effects (i.e., induction of autophagy and down-regulation of survivin). Importantly, the conversion of the carboxyl groups of PMASH into the neutral amides of poly(hydroxypropylmetacrylamide) (pHPMASH) nullified the off-target effects and cytotoxicity in tested cell lines. This suggests that the simultaneous action of carboxyl and disulfide groups in PMASH polymer or capsules may play a role in mediating the intracellular off-target effects. Our work provides evidence that the rational design of redox-active carriers for therapeutic-related application should be guided by a careful investigation on potential disturbance of the cellular machineries related to the carrier association.
Details
Original language | English |
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Pages (from-to) | 6261-6270 |
Number of pages | 10 |
Journal | Nanoscale |
Volume | 7 |
Issue number | 14 |
Publication status | Published - 14 Apr 2015 |
Peer-reviewed | Yes |
Externally published | Yes |
External IDs
PubMed | 25779724 |
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