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Kannaujiya VK, Qiao Y, Sheikh RH, Xue J, Dargaville TR, Liang K, Wich PR. pH-Responsive Micellar Nanoparticles for the Delivery of a Self-Amplifying ROS-Activatable Prodrug. Biomacromolecules 2024; 25:1775-1789. [PMID: 38377594 DOI: 10.1021/acs.biomac.3c01240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
The objective of this study is to enhance the therapeutic efficacy of the anticancer drug, camptothecin (CPT) via a nanoparticle (NP) formulation using a novel amphiphilic biopolymer. We have designed a dimeric prodrug of CPT with the ability to self-amplify and respond to reactive oxygen species (ROS). For this, we incorporated the intracellular ROS generator cinnamaldehyde into a ROS-cleavable thioacetal (TA) linker to obtain the dimeric prodrug of CPT (DCPT(TA)). For its efficient NP delivery, a pH-responsive block copolymer of acetalated dextran and poly(2-ethyl-2-oxazoline) (AcDex-b-PEOz) was synthesized. The amphiphilic feature of the block copolymer enables its self-assembly into micellar NPs and results in high prodrug loading capacity and a rapid release of the prodrug under acidic conditions. Upon cellular uptake by HeLa cells, DCPT(TA)-loaded micellar NPs induce intracellular ROS generation, resulting in accelerated prodrug activation and enhanced cytotoxicity. These results indicate that this system holds significant potential as an effective prodrug delivery strategy in anticancer treatment.
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Affiliation(s)
- Vinod K Kannaujiya
- School of Chemical Engineering, University of New South Wales, Sydney 2052, New South Wales, Australia
- Australian Centre for Nanomedicine, University of New South Wales, Sydney 2052, New South Wales, Australia
- Centre for Advanced Macromolecular Design, University of New South Wales, Sydney 2052, New South Wales, Australia
| | - Yijie Qiao
- School of Chemical Engineering, University of New South Wales, Sydney 2052, New South Wales, Australia
- Australian Centre for Nanomedicine, University of New South Wales, Sydney 2052, New South Wales, Australia
- Centre for Advanced Macromolecular Design, University of New South Wales, Sydney 2052, New South Wales, Australia
| | - Rakib H Sheikh
- School of Chemical Engineering, University of New South Wales, Sydney 2052, New South Wales, Australia
- Australian Centre for Nanomedicine, University of New South Wales, Sydney 2052, New South Wales, Australia
- Centre for Advanced Macromolecular Design, University of New South Wales, Sydney 2052, New South Wales, Australia
| | - Jueyi Xue
- School of Chemical Engineering, University of New South Wales, Sydney 2052, New South Wales, Australia
- Australian Centre for Nanomedicine, University of New South Wales, Sydney 2052, New South Wales, Australia
| | - Tim R Dargaville
- ARC Centre for Cell & Tissue Engineering Technologies, QUT Centre for Materials Science, School of Chemistry and Physics, Faculty of Science, Queensland University of Technology (QUT), Brisbane 4000, Australia
| | - Kang Liang
- School of Chemical Engineering, University of New South Wales, Sydney 2052, New South Wales, Australia
- Australian Centre for Nanomedicine, University of New South Wales, Sydney 2052, New South Wales, Australia
- Graduate School of Biomedical Engineering, The University of New South Wales, Sydney 2052, New South Wales, Australia
| | - Peter R Wich
- School of Chemical Engineering, University of New South Wales, Sydney 2052, New South Wales, Australia
- Australian Centre for Nanomedicine, University of New South Wales, Sydney 2052, New South Wales, Australia
- Centre for Advanced Macromolecular Design, University of New South Wales, Sydney 2052, New South Wales, Australia
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Göppert NE, Quader S, Van Guyse JFR, Weber C, Kataoka K, Schubert US. Amphiphilic Poly(2-oxazoline)s with Glycine-Containing Hydrophobic Blocks Tailored for Panobinostat- and Imatinib-Loaded Micelles. Biomacromolecules 2023; 24:5915-5925. [PMID: 37987713 DOI: 10.1021/acs.biomac.3c00934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2023]
Abstract
Aiming toward the development of tailored carrier materials for the cytostatics panobinostat and imatinib, an amphiphilic block copolymer composed of poly(2-ethyl-2-oxazoline) and a degradable poly(2-(3-phenylpropyl)-2-oxazoline) analogue (dPPhPrOx-b-PEtOx) was synthesized via a postpolymerization synthesis route based on reacylation of oxidized linear poly(ethylene imine). The obtained dPPhPrOx-b-PEtOx was found to readily self-assemble into well-defined micelles with a critical micelle concentration of 1 μg mL-1. The incubation of HUVEC cells with the blank micelles revealed their excellent cytocompatibility (up to 2 mg mL-1), thus confirming the polymers' suitability for potential drug delivery application. Subsequently, the encapsulation of the two cytostatics, panobinostat and imatinib, into the dPPhPrOx-b-PEtOx micelles was successfully demonstrated (Dh ≈ 80 nm, PDI ≈ 0.16), whereby the well-defined nature of the micelle was maintained upon extended incubation at 37 °C (36 h) and storage at 4 °C (1 month). Labeling of the micelles with Alexa Fluor 594 and Alexa Fluor 647, which form a Förster resonance energy transfer (FRET) pair, indicated the stability of loaded micelles upon dilution until the CMC. Finally, the cytotoxicity of the loaded micelles was investigated against three different cell lines: Medulloblastoma cell lines ONS-76 and DAOY as well as the glioblastoma cell line U87MG. While the panobinostat-loaded micelles displayed similar cytotoxicity compared to the pure drug in the cell lines, imatinib-loaded micelles were found to be more potent compared to the pristine drug, as significantly higher cytotoxicity was observed across all three cell lines.
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Affiliation(s)
- Natalie E Göppert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Sabina Quader
- Innovation Center of NanoMedicine, Kawasaki Institute of Industrial Promotion, 3-25-14 Tonomachi, Kawasaki-ku, Kawasaki 212-0821, Japan
| | - Joachim F R Van Guyse
- Innovation Center of NanoMedicine, Kawasaki Institute of Industrial Promotion, 3-25-14 Tonomachi, Kawasaki-ku, Kawasaki 212-0821, Japan
| | - Christine Weber
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
| | - Kazunori Kataoka
- Innovation Center of NanoMedicine, Kawasaki Institute of Industrial Promotion, 3-25-14 Tonomachi, Kawasaki-ku, Kawasaki 212-0821, Japan
| | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich Schiller University Jena, Humboldtstr. 10, 07743 Jena, Germany
- Jena Center for Soft Matter (JCSM), Friedrich Schiller University Jena, Philosophenweg 7, 07743 Jena, Germany
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Stafast LM, Engel N, Görls H, Weber C, Schubert US. End-functionalized diblock copolymers by mix and match of poly(2-oxazoline) and polyester building blocks. Eur Polym J 2022. [DOI: 10.1016/j.eurpolymj.2022.111779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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