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Zeolitic Imidazolate Framework-8 as pH-Sensitive Nanocarrier for "Arsenic Trioxide" Drug Delivery
Romy Ettlinger1, Natalia Moreno2, Dirk Volkmer1
1Chair of Solid State and Materials Chemistry, Institute of Physics, University of Augsburg, Universitaetsstraße 1, 86159, Augsburg, Germany.
Abstract:
Previous results revealed that arsenic trioxide might be used as promising therapeutic agent for the treatment of some solid tumours as atypical teratoid rhabdoid tumours (ATRT). However, in order to become an approved drug for solid tumour treatment, the active formulation has to get more efficient and feasible-but at the same time less toxic. One of the possibilities to achieve this dichotomy is to use nanomedicine tools. Herein, we report on the Zn-based metal-organic framework ZIF-8 (Zeolitic Imidazolate Framework-8) which turned out to be a promising candidate for the delivery of AsIII species. It conjointly features a high drug loading capacity and a prominent pH-triggered release behaviour. AsIII -loaded ZIF-8 nanoparticles coated and non-coated with polyethylene glycol were studied by XRPD, IR, Raman, TGA, TEM, EDX, CHN-elemental analysis, sorption analysis and ICP-OES, and their cytotoxicity was evaluated in vitro.
Insights
Arsenic trioxide shows promise for treating atypical teratoid rhabdoid tumors (ATRT). Researchers developed ZIF-8 nanoparticles for efficient, less toxic arsenic delivery, enhancing cancer treatment potential.
Area of Science:
- Nanomedicine
- Materials Science
- Oncology
Background:
- Arsenic trioxide (As2O3) shows therapeutic potential against solid tumors like atypical teratoid rhabdoid tumors (ATRT).
- Current formulations require enhanced efficiency, feasibility, and reduced toxicity for clinical approval.
- Nanomedicine offers a strategy to overcome these limitations in drug delivery.
Purpose of the Study:
- To investigate the potential of Zinc-based metal-organic framework ZIF-8 (Zeolitic Imidazolate Framework-8) for delivering arsenic species (AsIII).
- To characterize AsIII-loaded ZIF-8 nanoparticles, including polyethylene glycol (PEG)-coated variants.
- To evaluate the in vitro cytotoxicity of the developed nanocarrier system.
Main Methods:
- Synthesis and characterization of AsIII-loaded ZIF-8 nanoparticles using XRPD, IR, Raman, TGA, TEM, EDX, CHN-elemental analysis, sorption analysis, and ICP-OES.
- Evaluation of polyethylene glycol (PEG) coating effects on nanoparticle properties.
- In vitro cytotoxicity assays to assess therapeutic efficacy.
Main Results:
- ZIF-8 demonstrated high drug loading capacity for AsIII species.
- The nanocarrier exhibited prominent pH-triggered release behavior, crucial for targeted delivery.
- Characterization confirmed the successful loading of AsIII and the properties of coated/non-coated nanoparticles.
- Preliminary in vitro studies indicated cytotoxic effects, suggesting therapeutic potential.
Conclusions:
- ZIF-8 is a promising nanocarrier for AsIII delivery, offering high loading and controlled release.
- PEGylation may further optimize nanoparticle characteristics for enhanced drug delivery.
- This nanomedicine approach holds potential for improving arsenic-based therapies against ATRT and other solid tumors.