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Fujita M, Policastro GM, Burdick A, Lam HT, Ungerleider JL, Braden RL, Huang D, Osborn KG, Omens JH, Madani MM, Christman KL. Preventing post-surgical cardiac adhesions with a catechol-functionalized oxime hydrogel. Nat Commun 2021; 12:3764. [PMID: 34145265 PMCID: PMC8213776 DOI: 10.1038/s41467-021-24104-w] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 06/02/2021] [Indexed: 11/12/2022] Open
Abstract
Post-surgical cardiac adhesions represent a significant problem during routine cardiothoracic procedures. This fibrous tissue can impair heart function and inhibit surgical access in reoperation procedures. Here, we propose a hydrogel barrier composed of oxime crosslinked poly(ethylene glycol) (PEG) with the inclusion of a catechol (Cat) group to improve retention on the heart for pericardial adhesion prevention. This three component system is comprised of aldehyde (Ald), aminooxy (AO), and Cat functionalized PEG mixed to form the final gel (Ald-AO-Cat). Ald-AO-Cat has favorable mechanical properties, degradation kinetics, and minimal swelling, as well as superior tissue retention compared to an initial Ald-AO gel formulation. We show that the material is cytocompatible, resists cell adhesion, and led to a reduction in the severity of adhesions in an in vivo rat model. We further show feasibility in a pilot porcine study. The Ald-AO-Cat hydrogel barrier may therefore serve as a promising solution for preventing post-surgical cardiac adhesions.
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Affiliation(s)
- Masaki Fujita
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Gina M Policastro
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Austin Burdick
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Hillary T Lam
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Jessica L Ungerleider
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Rebecca L Braden
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA
| | - Diane Huang
- Department of Medicine, University of California, San Diego, San Diego, CA, USA
| | - Kent G Osborn
- Division of Comparative Pathology and Medicine, School of Medicine, University of California, San Diego, San Diego, CA, USA
| | - Jeffrey H Omens
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA
- Department of Medicine, University of California, San Diego, San Diego, CA, USA
| | - Michael M Madani
- Division of Cardiovascular and Thoracic Surgery, University of California, San Diego, San Diego, CA, USA
| | - Karen L Christman
- Department of Bioengineering, University of California, San Diego, San Diego, CA, USA.
- Sanford Consortium for Regenerative Medicine, University of California, San Diego, San Diego, CA, USA.
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Arno MC, Brannigan RP, Policastro GM, Becker ML, Dove AP. pH-Responsive, Functionalizable Spyrocyclic Polycarbonate: A Versatile Platform for Biocompatible Nanoparticles. Biomacromolecules 2018; 19:3427-3434. [PMID: 29927242 DOI: 10.1021/acs.biomac.8b00744] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Polymeric nanoparticles are widely investigated to enhance the selectivity of therapeutics to targeted sites, as well as to increase circulation lifetime and water solubility of poorly soluble drugs. In contrast to the encapsulation of the cargo into the nanostructures, the conjugation directly to the polymer backbone allows better control on the loading and selective triggered release. In this work we report a simple procedure to create biodegradable polycarbonate graft copolymer nanoparticles via a ring opening polymerization and subsequent postpolymerization modification strategies. The polymer, designed with both pH-responsive acetal linkages and a norbornene group, allows for highly efficient postpolymerization modifications through a range of chemistries to conjugate imaging agents and solubilizing arms to direct self-assembly. To demonstrate the potential of this approach, polycarbonate-based nanoparticles were tested for biocompatibility and their ability to be internalized in A549 and IMR-90 cell lines.
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Affiliation(s)
- Maria C Arno
- School of Chemistry , University of Birmingham , Edgbaston, Birmingham , B15 2TT , United Kingdom
| | - Ruairí P Brannigan
- Department of Chemistry , The University of Warwick , Gibbet Hill Road , Coventry CV4 7AL , United Kingdom
| | | | | | - Andrew P Dove
- School of Chemistry , University of Birmingham , Edgbaston, Birmingham , B15 2TT , United Kingdom
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Gao Y, Xu Y, Land A, Harris J, Policastro GM, Childers EP, Ritzman T, Bundy J, Becker ML. Sustained Release of Recombinant Human Growth Hormone from Bioresorbable Poly(ester urea) Nanofibers. ACS Macro Lett 2017. [DOI: 10.1021/acsmacrolett.7b00334] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Yaohua Gao
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Yanyi Xu
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Adam Land
- Summa Health System, Akron, Ohio 44304, United States
| | - Justin Harris
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Gina M. Policastro
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Erin P. Childers
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Todd Ritzman
- Department
of Pediatric Orthopedic Surgery, Akron Children’s Hospital, Akron, Ohio 44308-1062, United States
| | - Joshua Bundy
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
| | - Matthew L. Becker
- Department
of Polymer Science, The University of Akron, Akron, Ohio 44325-3909, United States
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Ma Y, Policastro GM, Li Q, Zheng J, Jacquet R, Landis WJ, Becker ML. Concentration-Dependent hMSC Differentiation on Orthogonal Concentration Gradients of GRGDS and BMP-2 Peptides. Biomacromolecules 2016; 17:1486-95. [DOI: 10.1021/acs.biomac.6b00088] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Affiliation(s)
- Yanrui Ma
- Department of Polymer Science and ‡Department of Biomedical
Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Gina M. Policastro
- Department of Polymer Science and ‡Department of Biomedical
Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Qiyao Li
- Department of Polymer Science and ‡Department of Biomedical
Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Jukuan Zheng
- Department of Polymer Science and ‡Department of Biomedical
Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Robin Jacquet
- Department of Polymer Science and ‡Department of Biomedical
Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - William J. Landis
- Department of Polymer Science and ‡Department of Biomedical
Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Matthew L. Becker
- Department of Polymer Science and ‡Department of Biomedical
Engineering, The University of Akron, Akron, Ohio 44325, United States
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Policastro GM, Becker ML. Osteogenic growth peptide and its use as a bio-conjugate in regenerative medicine applications. WIREs Nanomed Nanobiotechnol 2015; 8:449-64. [DOI: 10.1002/wnan.1376] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 07/18/2015] [Accepted: 08/12/2015] [Indexed: 12/13/2022]
Affiliation(s)
| | - Matthew L. Becker
- Departments of Polymer Science and Biomedical Engineering; University of Akron; Akron OH USA
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Abstract
The two-dimensional single-layer and few-layered graphene exhibit many attractive properties such as large specific surface area and high charge carrier mobility. However, graphene sheets tend to stack together and form aggregates, which do not possess the desirable properties associated with graphene. Herein, we report a method to fabricate three-dimensional (3D), bicontinuous graphene monolith through a versatile hollow nickel (Ni) template derived from polymer blends. The poly(styrene)/poly(ethylene oxide) were used to fabricate a bicontinuous gyroid template using controlled phase separation. The Ni template was formed by electroless metal depositing on the polymer followed by removing the polymer phase. The resulting hollow Ni structure was highly porous (95.2%). Graphene was then synthesized from this hollow Ni template using chemical vapor deposition and the free-standing bicontinuous graphene monolith was obtained in high-throughput process. Finally, the bicontinuous graphene monolith was used directly as binder-free electrode in supercapacitor applications. The supercapacitor devices exhibited excellent stability.
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Affiliation(s)
- Kewei Liu
- Department of Polymer Science, the University of Akron, 170 University Circle, Akron, Ohio 44325-3909, United States
| | - Yu-Ming Chen
- Department of Polymer Science, the University of Akron, 170 University Circle, Akron, Ohio 44325-3909, United States
| | - Gina M Policastro
- Department of Polymer Science, the University of Akron, 170 University Circle, Akron, Ohio 44325-3909, United States
| | - Matthew L Becker
- Department of Polymer Science, the University of Akron, 170 University Circle, Akron, Ohio 44325-3909, United States
| | - Yu Zhu
- Department of Polymer Science, the University of Akron, 170 University Circle, Akron, Ohio 44325-3909, United States
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Policastro GM, Lin F, Smith Callahan LA, Esterle A, Graham M, Sloan Stakleff K, Becker ML. OGP Functionalized Phenylalanine-Based Poly(ester urea) for Enhancing Osteoinductive Potential of Human Mesenchymal Stem Cells. Biomacromolecules 2015; 16:1358-71. [DOI: 10.1021/acs.biomac.5b00153] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
| | | | | | - Andrew Esterle
- Calhoun
Research Laboratory, Akron General Medical Center, Akron, Ohio 44307, United States
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Li S, Yu J, Wade MB, Policastro GM, Becker ML. Radiopaque, Iodine Functionalized, Phenylalanine-Based Poly(ester urea)s. Biomacromolecules 2015; 16:615-24. [DOI: 10.1021/bm501669u] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Shan Li
- Departments of †Polymer Science and ‡Biomedical Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Jiayi Yu
- Departments of †Polymer Science and ‡Biomedical Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Mary Beth Wade
- Departments of †Polymer Science and ‡Biomedical Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Gina M. Policastro
- Departments of †Polymer Science and ‡Biomedical Engineering, The University of Akron, Akron, Ohio 44325, United States
| | - Matthew L. Becker
- Departments of †Polymer Science and ‡Biomedical Engineering, The University of Akron, Akron, Ohio 44325, United States
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Tang W, Policastro GM, Hua G, Guo K, Zhou J, Wesdemiotis C, Doll GL, Becker ML. Bioactive surface modification of metal oxides via catechol-bearing modular peptides: multivalent-binding, surface retention, and peptide bioactivity. J Am Chem Soc 2014; 136:16357-67. [PMID: 25343707 DOI: 10.1021/ja508946h] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A series of multivalent dendrons containing a bioactive osteogenic growth peptide (OGP) domain and surface-binding catechol domains were obtained through solid phase synthesis, and their binding affinity to hydroxyapatite, TiO2, ZrO2, CeO2, Fe3O4 and gold was characterized using a quartz crystal microbalance with dissipation (QCM-d). Using the distinct difference in binding affinity of the bioconjugate to the metal oxides, TiO2-coated glass slides were selectively patterned with bioactive peptides. Cell culture studies demonstrated the bioavailability of the OGP and that OGP remained on the surface for at least 2 weeks under in vitro cell culture conditions. Bone sialoprotein (BSP) and osteocalcein (OCN) markers were upregulated 3-fold and 60-fold, respectively, relative to controls at 21 days. Similarly, 3-fold more calcium was deposited using the OGP tethered dendron compared to TiO2. These catechol-bearing dendrons provide a fast and efficient method to functionalize a wide range of inorganic materials with bioactive peptides and have the potential to be used in coating orthopaedic implants and fixation devices.
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Affiliation(s)
- Wen Tang
- Department of Polymer Science, The University of Akron , Akron, Ohio 44325, United States
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Smith Callahan LA, Policastro GM, Bernard SL, Childers EP, Boettcher R, Becker ML. Influence of discrete and continuous culture conditions on human mesenchymal stem cell lineage choice in RGD concentration gradient hydrogels. Biomacromolecules 2013; 14:3047-54. [PMID: 23844746 PMCID: PMC5944333 DOI: 10.1021/bm4006112] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Stem cells have shown lineage-specific differentiation when cultured on substrates possessing signaling groups derived from the native tissue. A distinct determinant in this process is the concentration of the signaling motif. While several groups have been working actively to determine the specific factors, concentrations, and mechanisms governing the differentiation process, many have been turning to combinatorial and gradient approaches in attempts to optimize the multiple chemical and physical parameters needed for the next advance. However, there has not been a direct comparison between the cellular behavior and differentiation of human mesenchymal stem cells cultured in gradient and discrete substrates, which quantitates the effect of differences caused by cell-produced, soluble factors due to design differences between the culture systems. In this study, the differentiation of human mesenchymal stem cells in continuous and discrete polyethylene glycol dimethacrylate (PEGDM) hydrogels containing an RGD concentration gradient from 0 to 14 mM were examined to study the effects of the different culture conditions on stem-cell behavior. Culture condition was found to affect every osteogenic (alkaline phosphatase, Runx 2, type 1 collagen, bone sailoprotein, and calcium content) and adipogenic marker (oil red and peroxisome proliferator-activated receptor gamma) examined regardless of RGD concentration. Only in the continuous gradient culture did RGD concentration affect human mesenchymal stem-cell lineage commitment with low RGD concentrations expressing higher osteogenic differentiation than high RGD concentrations. Conversely, high RGD concentrations expressed higher adipogenic differentiation than low RGD concentrations. Cytoskeletal actin organization was only affected by culture condition at low RGD concentrations, indicating that it played a limited role in the differences in lineage commitment observed. Therefore, the role of discrete versus gradient strategies in high-throughput experimentation needs to be considered when designing experiments as we show that the respective strategies alter cellular outcomes even though base scaffolds have similar material and chemical properties.
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