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Shahi S, Roghani-Mamaqani H, Talebi S, Mardani H. Chemical stimuli-induced reversible bond cleavage in covalently crosslinked hydrogels. Coord Chem Rev 2022. [DOI: 10.1016/j.ccr.2021.214368] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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2
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Hui E, Sumey JL, Caliari SR. Click-functionalized hydrogel design for mechanobiology investigations. MOLECULAR SYSTEMS DESIGN & ENGINEERING 2021; 6:670-707. [PMID: 36338897 PMCID: PMC9631920 DOI: 10.1039/d1me00049g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
The advancement of click-functionalized hydrogels in recent years has coincided with rapid growth in the fields of mechanobiology, tissue engineering, and regenerative medicine. Click chemistries represent a group of reactions that possess high reactivity and specificity, are cytocompatible, and generally proceed under physiologic conditions. Most notably, the high level of tunability afforded by these reactions enables the design of user-controlled and tissue-mimicking hydrogels in which the influence of important physical and biochemical cues on normal and aberrant cellular behaviors can be independently assessed. Several critical tissue properties, including stiffness, viscoelasticity, and biomolecule presentation, are known to regulate cell mechanobiology in the context of development, wound repair, and disease. However, many questions still remain about how the individual and combined effects of these instructive properties regulate the cellular and molecular mechanisms governing physiologic and pathologic processes. In this review, we discuss several click chemistries that have been adopted to design dynamic and instructive hydrogels for mechanobiology investigations. We also chart a path forward for how click hydrogels can help reveal important insights about complex tissue microenvironments.
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Affiliation(s)
- Erica Hui
- Department of Chemical Engineering, University of Virginia, 102 Engineer's Way, Charlottesville, Virginia 22904, USA
| | - Jenna L Sumey
- Department of Chemical Engineering, University of Virginia, 102 Engineer's Way, Charlottesville, Virginia 22904, USA
| | - Steven R Caliari
- Department of Chemical Engineering, University of Virginia, 102 Engineer's Way, Charlottesville, Virginia 22904, USA
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22904, USA
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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] [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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Click chemistry strategies for the accelerated synthesis of functional macromolecules. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210126] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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5
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Li Z, Liu L, Chen Y. Dual dynamically crosslinked thermosensitive hydrogel with self-fixing as a postoperative anti-adhesion barrier. Acta Biomater 2020; 110:119-128. [PMID: 32438111 DOI: 10.1016/j.actbio.2020.04.034] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 04/08/2020] [Accepted: 04/20/2020] [Indexed: 11/30/2022]
Abstract
Tissue adhesion is a severe postoperative complication. Various strategies have been developed to minimize postoperative adhesion, but the clinical efficacy is still far from satisfactory. Herein, we present a dual dynamically crosslinked hydrogel to serve as a physical postoperative anti-adhesion barrier. The hydrogel was generated by dynamic chemical oxime bonding from alkoxyamine-terminated Pluronic F127 (AOP127) and oxidized hyaluronic acid (OHA), as well as hydrophobic association of AOP127. Rheological analysis demonstrated that the hydrogel exhibits temperature sensitivity. At 37 °C, it shows much higher modulus and higher stability than the Pluronic F127 hydrogel. Hemolytic assays suggested that the hydrogel undergoes low hemolysis. In addition, it exhibited anti-adhesion to blood cells in blood cell adhesion tests. It also showed an anti-attachment effect to fibroblasts and biocompatibility in vitro cell studies. Macroscopic evaluation and lap-shear tests revealed that the hydrogel has a moderate adhesive capacity to tissue, which is important for self-fixation. A rat model of sidewall defect-bowel abrasion was established to evaluate the anti-adhesion effect in vivo. The gross observation and pathological analysis revealed a significant reduction in postoperative peritoneal adhesion in the AOP127/OHA hydrogel-treated group than those treated with normal saline or Pluronic F127 hydrogel. Hence, the dual dynamically crosslinked hydrogel with self-fixable capacity may be suitable as a physical barrier for postoperative adhesion prevention. STATEMENT OF SIGNIFICANCE: Despite the development of numerous postoperative anti-adhesion barriers, their anti-adhesion efficacy is still limited in clinical trials due to poor tissue adhesion and rapid clearance from injured areas. Herein, we have developed a dual dynamic crosslinked hydrogel, generated by dynamic oxime bonds and hydrophobic interactions. The hydrogel is temperature-sensitive and demonstrates moderate tissue adhesion capacity, which allows for self-fixation when applied to defects. The introduction of dynamic covalent bonds improves the stability of the hydrogel. Moreover, the hydrogel not only displays appropriate hemocompatibility, cytocompatibility and anti-adhesion of blood cells and fibroblasts, but it also effectively contributes to preventing postoperative peritoneal adhesions in vivo. Hence, this dual dynamic crosslinked hydrogel may have potential applications as a physical barrier in clinical practice.
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Affiliation(s)
- Ziyi Li
- School of Materials Science and Engineering, Key Laboratory of Polymeric Composite Materials and Functional Materials of Ministry of Education, GD Research Center for Functional Biomaterials Engineering and Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Lixin Liu
- School of Materials Science and Engineering, Key Laboratory of Polymeric Composite Materials and Functional Materials of Ministry of Education, GD Research Center for Functional Biomaterials Engineering and Technology, Sun Yat-sen University, Guangzhou 510275, China
| | - Yongming Chen
- School of Materials Science and Engineering, Key Laboratory of Polymeric Composite Materials and Functional Materials of Ministry of Education, GD Research Center for Functional Biomaterials Engineering and Technology, Sun Yat-sen University, Guangzhou 510275, China.
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Karimi F, Collins J, Heath DE, Connal LA. Dynamic Covalent Hydrogels for Triggered Cell Capture and Release. Bioconjug Chem 2017; 28:2235-2240. [PMID: 28809538 DOI: 10.1021/acs.bioconjchem.7b00360] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
A dual-responsive, cell capture and release surface was prepared through the incorporation of phenylboronic acid (PBA) groups into an oxime-based polyethylene glycol (PEG) hydrogel. Owing to its PEG-like properties, the unfunctionalized hydrogel was nonfouling. The use of highly efficient oxime chemistry allows the incorporation of commercially available 3,5-diformylphenyl boronic acid into the hydrogel matrix. Thus, the surface properties of the hydrogel were modified to enable reversible cell capture and release. Boronic ester formation between PBA groups and cell surface carbohydrates enabled efficient cell capture at pH 6.8. An increase to pH 7.8 resulted in cell detachment. This capture-and-release procedure was performed on MCF-7 human breast cancer cells, NIH-3T3 fibroblast cells, and primary human umbilical vein endothelial cells (HUVECs) and could be cycled with negligible loss in activity. The facile preparation of PBA-functionalized surfaces presented here has applications in biomedical fields such as cell diagnostics and cell culture.
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Affiliation(s)
- Fatemeh Karimi
- School of Chemical and Biomedical Engineering, Particulate Fluids Processing Centre and ‡Polymer Science Group, Department of Chemical and Biomolecular Engineering, Particulate Fluids Processing Centre, University of Melbourne , Parkville, Melbourne, Victoria 3010, Australia
| | - Joe Collins
- School of Chemical and Biomedical Engineering, Particulate Fluids Processing Centre and ‡Polymer Science Group, Department of Chemical and Biomolecular Engineering, Particulate Fluids Processing Centre, University of Melbourne , Parkville, Melbourne, Victoria 3010, Australia
| | - Daniel E Heath
- School of Chemical and Biomedical Engineering, Particulate Fluids Processing Centre and ‡Polymer Science Group, Department of Chemical and Biomolecular Engineering, Particulate Fluids Processing Centre, University of Melbourne , Parkville, Melbourne, Victoria 3010, Australia
| | - Luke A Connal
- School of Chemical and Biomedical Engineering, Particulate Fluids Processing Centre and ‡Polymer Science Group, Department of Chemical and Biomolecular Engineering, Particulate Fluids Processing Centre, University of Melbourne , Parkville, Melbourne, Victoria 3010, Australia
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Reducing posttreatment relapse in cleft lip palatal expansion using an injectable estrogen-nanodiamond hydrogel. Proc Natl Acad Sci U S A 2017; 114:E7218-E7225. [PMID: 28808036 DOI: 10.1073/pnas.1704027114] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Patients with cleft lip and/or palate (CLP), who undergo numerous medical interventions from infancy, can suffer from lifelong debilitation caused by underdeveloped maxillae. Conventional treatment approaches use maxillary expansion techniques to develop normal speech, achieve functional occlusion for nutrition intake, and improve esthetics. However, as patients with CLP congenitally lack bone in the cleft site with diminished capacity for bone formation in the expanded palate, more than 80% of the patient population experiences significant postexpansion relapse. While such relapse has been a long-standing battle in craniofacial care of patients, currently there are no available strategies to address this pervasive problem. Estrogen, 17β-estradiol (E2), is a powerful therapeutic agent that plays a critical role in bone homeostasis. However, E2's clinical application is less appreciated due to several limitations, including its pleiotropic effects and short half-life. Here, we developed a treatment strategy using an injectable system with photo-cross-linkable hydrogel (G) and nanodiamond (ND) technology to facilitate the targeted and sustained delivery of E2 to promote bone formation. In a preclinical expansion/relapse model, this functionalized E2/ND/G complex substantially reduced postexpansion relapse by nearly threefold through enhancements in sutural remodeling compared with unmodified E2 administration. The E2/ND/G group demonstrated greater bone volume by twofold and higher osteoblast number by threefold, compared with the control group. The E2/ND/G platform maximized the beneficial effects of E2 through its extended release with superior efficacy and safety at the local level. This broadly applicable E2 delivery platform shows promise as an adjuvant therapy in craniofacial care of patients.
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Collins J, Nadgorny M, Xiao Z, Connal LA. Doubly Dynamic Self-Healing Materials Based on Oxime Click Chemistry and Boronic Acids. Macromol Rapid Commun 2017; 38. [DOI: 10.1002/marc.201600760] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Indexed: 12/11/2022]
Affiliation(s)
- Joe Collins
- The Department of Chemical and Biomolecular Engineering; The University of Melbourne; Parkville Victoria 3010 Australia
| | - Milena Nadgorny
- The Department of Chemical and Biomolecular Engineering; The University of Melbourne; Parkville Victoria 3010 Australia
| | - Zeyun Xiao
- The Department of Chemical and Biomolecular Engineering; The University of Melbourne; Parkville Victoria 3010 Australia
| | - Luke A. Connal
- The Department of Chemical and Biomolecular Engineering; The University of Melbourne; Parkville Victoria 3010 Australia
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Collins J, Xiao Z, Espinosa-Gomez A, Fors BP, Connal LA. Extremely rapid and versatile synthesis of high molecular weight step growth polymers via oxime click chemistry. Polym Chem 2016. [DOI: 10.1039/c6py00372a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Extremely rapid step growth polymerization was achieved using an oxime click chemistry approach.
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Affiliation(s)
- Joe Collins
- The Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Australia, 3010
| | - Zeyun Xiao
- The Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Australia, 3010
| | - Andrea Espinosa-Gomez
- The Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Australia, 3010
| | - Brett P. Fors
- Department of Chemistry and Chemical Biology
- Ithaca
- USA
| | - Luke A. Connal
- The Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Australia, 3010
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Ghosh S, Cabral JD, Hanton LR, Moratti SC. Strong poly(ethylene oxide) based gel adhesives via oxime cross-linking. Acta Biomater 2016; 29:206-214. [PMID: 26476342 DOI: 10.1016/j.actbio.2015.10.018] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 09/28/2015] [Accepted: 10/13/2015] [Indexed: 01/08/2023]
Abstract
There is a demand for materials to replace or augment the use of sutures and staples in surgical procedures. Currently available commercial surgical adhesives provide either high bond strength with biological toxicity or polymer and protein-based products that are biologically acceptable (though with potential sensitizing potential) but have much reduced bond strength. It is desirable to provide novel biocompatible and biodegradable surgical adhesives/sealants capable of high strength with minimal immune or inflammatory response. In this work, we report the end group derivatization of 8-arm star PEOs with aldehyde and amine end groups. Gels were prepared employing the Schiff-base chemistry between the aldehydes and the amines. Gel setting times, swelling behavior and rheological characterization were carried out for these gels. The mechanical-viscoelastic properties were found to be directly proportional to the crosslinking density of the gels, the 10K PEO gel was stiffer in comparison to the 20K PEO gel. The adhesive properties of these gels were tested using porcine skin and showed excellent adhesion properties. Cytotoxicity studies were carried out for the individual gel components using two different methods: (a) Crystal Violet Staining assay (CVS assay) and (b) impedance and cell index measurement by the xCELLigence system at concentrations >5%. Gels prepared by mixing 20% w/w solutions were also tested for cytotoxicity. The results revealed that the individual gel components as well as the prepared gels and their leachables were non-cytotoxic at these concentrations. STATEMENT OF SIGNIFICANCE This work presents a new type of glue that is aimed at surgery applications using a water soluble star shaped polymer. It show excellent adhesion to skin and is tough and easy to use. We show that it is very biocompatible based on tests on live human cells, and could therefore in principle be used for internal surgery. Comparison with other reported and commercial glues shows that it is stronger than most, and does not swell in water to the same degree as many other water based bioadhesives.
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Collins J, Xiao Z, Müllner M, Connal LA. The emergence of oxime click chemistry and its utility in polymer science. Polym Chem 2016. [DOI: 10.1039/c6py00635c] [Citation(s) in RCA: 89] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The synthesis of new, highly functional and dynamic polymeric materials has risen dramatically since the introduction of click chemistry in 2001.
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Affiliation(s)
- Joe Collins
- The Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Australia
| | - Zeyun Xiao
- The Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Australia
| | - Markus Müllner
- School of Chemistry
- Key Centre for Polymers and Colloids
- The University of Sydney
- Australia
| | - Luke A. Connal
- The Department of Chemical and Biomolecular Engineering
- The University of Melbourne
- Australia
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