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Finbloom JA, Raghavan P, Kwon M, Kharbikar BN, Yu MA, Desai TA. Codelivery of synergistic antimicrobials with polyelectrolyte nanocomplexes to treat bacterial biofilms and lung infections. SCIENCE ADVANCES 2023; 9:eade8039. [PMID: 36662850 PMCID: PMC9858510 DOI: 10.1126/sciadv.ade8039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Accepted: 12/20/2022] [Indexed: 06/17/2023]
Abstract
Bacterial biofilm infections, particularly those of Pseudomonas aeruginosa (PA), have high rates of antimicrobial tolerance and are commonly found in chronic wound and cystic fibrosis lung infections. Combination therapeutics that act synergistically can overcome antimicrobial tolerance; however, the delivery of multiple therapeutics at relevant dosages remains a challenge. We therefore developed a nanoscale drug carrier for antimicrobial codelivery by combining approaches from polyelectrolyte nanocomplex (NC) formation and layer-by-layer electrostatic self-assembly. This strategy led to NC drug carriers loaded with tobramycin antibiotics and antimicrobial silver nanoparticles (AgTob-NCs). AgTob-NCs displayed synergistic enhancements in antimicrobial activity against both planktonic and biofilm PA cultures, with positively charged NCs outperforming negatively charged formulations. NCs were evaluated in mouse models of lung infection, leading to reduced bacterial burden and improved survival outcomes. This approach therefore shows promise for nanoscale therapeutic codelivery to treat recalcitrant bacterial infections.
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Affiliation(s)
- Joel A. Finbloom
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA, USA
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC, Canada
| | - Preethi Raghavan
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Michael Kwon
- Division of Pulmonary and Critical Care Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Bhushan N. Kharbikar
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA, USA
| | - Michelle A. Yu
- Division of Pulmonary and Critical Care Medicine, University of California, San Francisco, San Francisco, CA, USA
| | - Tejal A. Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, CA, USA
- School of Engineering, Brown University, Providence, RI, USA
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Suturin AC, Krüger AJD, Neidig K, Klos N, Dolfen N, Bund M, Gronemann T, Sebers R, Manukanc A, Yazdani G, Kittel Y, Rommel D, Haraszti T, Köhler J, De Laporte L. Annealing High Aspect Ratio Microgels into Macroporous 3D Scaffolds Allows for Higher Porosities and Effective Cell Migration. Adv Healthc Mater 2022; 11:e2200989. [PMID: 36100464 DOI: 10.1002/adhm.202200989] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 08/25/2022] [Indexed: 01/28/2023]
Abstract
Growing millimeter-scaled functional tissue remains a major challenge in the field of tissue engineering. Therefore, microporous annealed particles (MAPs) are emerging as promising porous biomaterials that are formed by assembly of microgel building blocks. To further vary the pore size and increase overall MAP porosity of mechanically stable scaffolds, rod-shaped microgels with high aspect ratios up to 20 are chemically interlinked into highly porous scaffolds. Polyethylene glycol based microgels (width 10 µm, lengths up to 200 µm) are produced via in-mold polymerization and covalently interlinked into stable 3D scaffolds via epoxy-amine chemistry. For the first time, MAP porosities can be enhanced by increasing the microgel aspect ratio (mean pore sizes ranging from 39 to 82 µm, porosities from 65 to 90%). These porosities are significantly higher compared to constructs made from spherical or lower aspect ratio rod-shaped microgels. Rapid filling of the pores by either murine or primary human fibroblasts is ensured as cells migrate and grow extensively into these scaffolds. Overall, this study demonstrates that highly porous, stable macroporous hydrogels can be achieved with a very low partial volume of synthetic, high aspect ratio microgels, leading to large empty volumes available for cell ingrowth and cell-cell interactions.
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Affiliation(s)
- Alisa C Suturin
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany.,Institute of Technical and Macromolecular Chemistry (ITMC), Polymeric Biomaterials, RWTH University Aachen, Worringerweg 2, 52074, Aachen, Germany
| | - Andreas J D Krüger
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany.,Institute of Technical and Macromolecular Chemistry (ITMC), Polymeric Biomaterials, RWTH University Aachen, Worringerweg 2, 52074, Aachen, Germany
| | - Kathrin Neidig
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Nina Klos
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Nina Dolfen
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Michelle Bund
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Till Gronemann
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Rebecca Sebers
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Anna Manukanc
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Ghazaleh Yazdani
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany
| | - Yonca Kittel
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany.,Institute of Technical and Macromolecular Chemistry (ITMC), Polymeric Biomaterials, RWTH University Aachen, Worringerweg 2, 52074, Aachen, Germany
| | - Dirk Rommel
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany.,Institute of Technical and Macromolecular Chemistry (ITMC), Polymeric Biomaterials, RWTH University Aachen, Worringerweg 2, 52074, Aachen, Germany
| | - Tamás Haraszti
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany.,Institute of Technical and Macromolecular Chemistry (ITMC), Polymeric Biomaterials, RWTH University Aachen, Worringerweg 2, 52074, Aachen, Germany
| | - Jens Köhler
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany.,Institute of Technical and Macromolecular Chemistry (ITMC), Polymeric Biomaterials, RWTH University Aachen, Worringerweg 2, 52074, Aachen, Germany
| | - Laura De Laporte
- DWI - Leibniz-Institute for Interactive Materials, Forckenbeckstraße 50, 52074, Aachen, Germany.,Institute of Technical and Macromolecular Chemistry (ITMC), Polymeric Biomaterials, RWTH University Aachen, Worringerweg 2, 52074, Aachen, Germany.,Advanced Materials for Biomedicine (AMB), Institute of Applied Medical Engineering (AME), University Hospital RWTH Aachen, Center for Biohybrid Medical Systems (CMBS), Forckenbeckstraße 55, 52074, Aachen, Germany
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Finbloom JA, Cao Y, Desai TA. Bioinspired Polymeric High Aspect Ratio Particles with Asymmetric Janus Functionalities. ADVANCED NANOBIOMED RESEARCH 2021; 1:2000057. [PMID: 33997858 PMCID: PMC8115014 DOI: 10.1002/anbr.202000057] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Polymeric particles with intricate morphologies and properties have been developed based on bioinspired designs for applications in regenerative medicine, tissue engineering, and drug delivery. However, the fabrication of particles with asymmetric functionalities remains a challenge. Janus polymeric particles are an emerging class of material with asymmetric functionalities; however, they are predominantly spherical in morphology, made from non-biocompatible materials, and made using specialized fabrication techniques. We therefore set out to fabricate nonspherical Janus particles inspired by high aspect ratio filamentous bacteriophage using polycaprolactone polymers and standard methods. Janus high aspect ratio particles (J-HARPs) were fabricated with a nanotemplating technique to create branching morphologies selectively at one edge of the particle. J-HARPs were fabricated with maleimide handles and modified with biomolecules such as proteins and biotin. Regioselective modification was observed at the tips of J-HARPs, likely owing to the increased surface area of the branching regions. Biotinylated J-HARPs demonstrated cancer cell biotin receptor targeting, as well as directional crosslinking with spherical particles via biotin-streptavidin interactions. Lastly, maleimide J-HARPs were functionalized during templating to contain amines exclusively at the branching regions and were dual-labeled orthogonally, demonstrating spatially separated bioconjugation. Thus, J-HARPs represent a new class of bioinspired Janus material with excellent regional control over biofunctionalization.
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Affiliation(s)
- Joel A Finbloom
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, 204 Byers Hall, 1700 4 Street, San Francisco, CA 94158 USA
| | - Yiqi Cao
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, 204 Byers Hall, 1700 4 Street, San Francisco, CA 94158 USA
| | - Tejal A Desai
- Department of Bioengineering and Therapeutic Sciences, University of California San Francisco, 204 Byers Hall, 1700 4 Street, San Francisco, CA 94158 USA
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