1
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Suwannakot P, Nemec S, Peres NG, Du EY, Kilian KA, Gaus K, Kavallaris M, Gooding JJ. Electrostatic Assembly of Multiarm PEG-Based Hydrogels as Extracellular Matrix Mimics: Cell Response in the Presence and Absence of RGD Cell Adhesive Ligands. ACS Biomater Sci Eng 2023; 9:1362-1376. [PMID: 36826383 DOI: 10.1021/acsbiomaterials.2c01252] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/25/2023]
Abstract
Synthetic hydrogels have been used widely as extracellular matrix (ECM) mimics due to the ability to control and mimic physical and biochemical cues observed in natural ECM proteins such as collagen, laminin, and fibronectin. Most synthetic hydrogels are formed via covalent bonding resulting in slow gelation which is incompatible with drop-on-demand 3D bioprinting of cells and injectable hydrogels for therapeutic delivery. Herein, we developed an electrostatically crosslinked PEG-based hydrogel system for creating high-throughput 3D in vitro models using synthetic hydrogels to mimic the ECM cancer environment. A 3-arm PEG-based polymer backbone was first modified with either permanent cationic charged moieties (2-(methacryloyloxy)ethyl trimethylammonium) or permanent anionic charged moieties (3-sulfopropyl methacrylate potassium salt). The resulting charged polymers can be conjugated further with various amounts of cell adhesive RGD motifs (0, 25, 75, and 98%) to study the influences of RGD motifs on breast cancer (MCF-7) spheroid formation. Formation, stability, and mechanical properties of hydrogels were tested with, and without, RGD to evaluate the cellular response to material parameters in a 3D environment. The hydrogels can be degraded in the presence of salts at room temperature by breaking the interaction of oppositely charged polymer chains. MCF-7 cells could be released with high viability through brief exposure to NaCl solution. Flow cytometry characterization demonstrated that embedded MCF-7 cells proliferate better in a softer (60 Pa) 3D hydrogel environment compared to those that are stiffer (1160 Pa). As the stiffness increases, the RGD motif plays a role in promoting cell proliferation in the stiffer hydrogel. Flow cytometry characterization demonstrated that embedded MCF-7 cells proliferate better in a softer (60 Pa) 3D hydrogel environment compared to those that are stiffer (1160 Pa). As the stiffness increases, the RGD motif plays a role in promoting cell proliferation in the stiffer hydrogel. Additionally, cell viability was not impacted by the tested hydrogel stiffness range between 60 to 1160 Pa. Taken together, this PEG-based tuneable hydrogel system shows great promise as a 3D ECM mimic of cancer extracellular environments with controllable biophysical and biochemical properties. The ease of gelation and dissolution through salt concentration provides a way to quickly harvest cells for further analysis at any given time of interest without compromising cell viability.
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Affiliation(s)
- Panthipa Suwannakot
- School of Chemistry, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for NanoMedicine, UNSW, Sydney, New South Wales 2052, Australia
| | - Stephanie Nemec
- School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia
| | - Newton Gil Peres
- School of Medical Sciences, EMBL Australia Node in Single Molecule Science, UNSW, Sydney, New South Wales 2052, Australia
| | - Eric Y Du
- School of Chemistry, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for NanoMedicine, UNSW, Sydney, New South Wales 2052, Australia
| | - Kristopher A Kilian
- School of Chemistry, UNSW, Sydney, New South Wales 2052, Australia
- School of Materials Science and Engineering, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for NanoMedicine, UNSW, Sydney, New South Wales 2052, Australia
| | - Katharina Gaus
- School of Medical Sciences, EMBL Australia Node in Single Molecule Science, UNSW, Sydney, New South Wales 2052, Australia
| | - Maria Kavallaris
- Children's Cancer Institute, Lowy Cancer Research Centre, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for NanoMedicine, UNSW, Sydney, New South Wales 2052, Australia
| | - J Justin Gooding
- School of Chemistry, UNSW, Sydney, New South Wales 2052, Australia
- Australian Centre for NanoMedicine, UNSW, Sydney, New South Wales 2052, Australia
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2
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Xu J, Hadjichristidis N. Heteroatom-containing degradable polymers by ring-opening metathesis polymerization. Prog Polym Sci 2023. [DOI: 10.1016/j.progpolymsci.2023.101656] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2023]
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3
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Spesivaya ES, Lupanova IA, Konshina DN, Konshin VV. Synthesis of 1,3-Dioxacycloalkyl-Containing Azoxybenzenes. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222080023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Dellago B, Ricke A, Geyer T, Liska R, Baudis S. Photopolymerizable precursors for degradable biomaterials based on acetal moieties. Eur Polym J 2021. [DOI: 10.1016/j.eurpolymj.2021.110536] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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5
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Soft-hard hybrid covalent-network polymer sponges with super resilience, recoverable energy dissipation and fatigue resistance under large deformation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 126:112185. [PMID: 34082984 DOI: 10.1016/j.msec.2021.112185] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 05/03/2021] [Accepted: 05/12/2021] [Indexed: 11/20/2022]
Abstract
Energy absorption or dissipation ability has been widely developed in tough hydrogels and 3D nano-structured sponges for a variety of applications. However, fully recoverable energy dissipation and fatigue resistance under large deformation is still challenging yet highly desirable. Polymer network with homogeneous chemical crosslinking structures is an efficient way to construct hydrogels with high resilience and fatigue resistance. Unfortunately, such polymer network usually has poor energy dissipation capability. In this paper, we propose a new approach to build the ability of fully recoverable energy dissipation into covalent-crosslink polymer network by integrating soft and hard chains in a uniform crosslinking network and present the one-pot synthesis method for constructing corresponding polymer sponges by low-temperature phase-separation photopolymerization. The application of such polymer sponges as a tissue engineering scaffold, fabricated by using cyclic acetal units and PEG based monomers in particular is demonstrated. For the first time, we show the feasibility of building a synthetic scaffold with the characteristics of high porosity, super compressibility and resilience, fast recovery, completely recoverable energy dissipation, high fatigue resistance, biodegradability and biocompatibility. Such a scaffold is promising in tissue engineering especially in load-bearing applications.
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6
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Herwig G, Pérez-Madrigal MM, Dove AP. Customized Fading Scaffolds: Strong Polyorthoester Networks via Thiol-Ene Cross-linking for Cytocompatible Surface-Eroding Materials in 3D Printing. Biomacromolecules 2021; 22:1472-1483. [PMID: 33683869 DOI: 10.1021/acs.biomac.0c01668] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Polyorthoesters are a highly desirable class of cytocompatible materials that are able to rapidly surface-erode. Despite their promise, their mechanical weakness and complex synthesis have limited their processability and application in advanced technologies. Herein, we report a readily accessible family of cross-linked poly(orthoester-thioether) (POETE) materials that are suitable for processing via photopolymerization. Polymer networks are accessed through bifunctional orthoester precursors using simple thiol-ene addition chemistry. The mobility of the polymer chains and the cross-linking density within the polymer structure can be tuned through the choice of the monomer, which in turn presents customizable thermal and mechanical properties in the resulting materials. The photopolymerizability of these POETE materials also allows for processing via additive manufacturing, which is demonstrated on a commercial 3D printer. Post-processing conditions and architecture are crucial to material degradability and are exploited for programmed bulk-release applications with degradation rate and release time linearly dependent on the specimen dimensions, such as strand or shell thickness. Analogous to acid-releasing polylactide materials, degradation products of the POETE materials show cytocompatibility below a certain concentration/acidity threshold. This research highlights the simplicity, versatility, and applicability of POETE networks as cytocompatible, surface-eroding materials that can be processed by additive manufacturing for advanced applications.
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Affiliation(s)
- Gordon Herwig
- Department of Chemistry, University of Warwick, Coventry CV8 4AL, U.K.,School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K.,Laboratory for Advanced Fibers, Empa-Swiss Federal Laboratories for Materials Testing and Research, Lerchenfeldstrasse 5, St. Gallen 9014, Switzerland
| | | | - Andrew P Dove
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham B15 2TT, U.K
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7
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Kost B, Basko M. Synthesis and properties of l-lactide/1,3-dioxolane copolymers: preparation of polyesters with enhanced acid sensitivity. Polym Chem 2021. [DOI: 10.1039/d1py00358e] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Herein, we report the first example of cationic ring-opening copolymerization of 5-membered cyclic acetal (1,3-dioxolane (DXL)) with l-lactide (LA) to afford polylactide containing acetal units.
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Affiliation(s)
- Bartłomiej Kost
- Centre of Molecular and Macromolecular Studies
- Polish Academy of Sciences
- 90-363 Lodz
- Poland
| | - Malgorzata Basko
- Centre of Molecular and Macromolecular Studies
- Polish Academy of Sciences
- 90-363 Lodz
- Poland
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8
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Lopez CE, Legge KL. Influenza A Virus Vaccination: Immunity, Protection, and Recent Advances Toward A Universal Vaccine. Vaccines (Basel) 2020; 8:E434. [PMID: 32756443 PMCID: PMC7565301 DOI: 10.3390/vaccines8030434] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 07/28/2020] [Accepted: 07/31/2020] [Indexed: 12/19/2022] Open
Abstract
Influenza virus infections represent a serious public health threat and account for significant morbidity and mortality worldwide due to seasonal epidemics and periodic pandemics. Despite being an important countermeasure to combat influenza virus and being highly efficacious when matched to circulating influenza viruses, current preventative strategies of vaccination against influenza virus often provide incomplete protection due the continuous antigenic drift/shift of circulating strains of influenza virus. Prevention and control of influenza virus infection with vaccines is dependent on the host immune response induced by vaccination and the various vaccine platforms induce different components of the local and systemic immune response. This review focuses on the immune basis of current (inactivated influenza vaccines (IIV) and live attenuated influenza vaccines (LAIV)) as well as novel vaccine platforms against influenza virus. Particular emphasis will be placed on how each platform induces cross-protection against heterologous influenza viruses, as well as how this immunity compares to and contrasts from the "gold standard" of immunity generated by natural influenza virus infection.
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Affiliation(s)
- Christopher E. Lopez
- Department of Microbiology and Immunology University of Iowa, Iowa City, IA 52242, USA;
- Department of Pathology, University of Iowa, Iowa City, IA 52242, USA
| | - Kevin L. Legge
- Department of Microbiology and Immunology University of Iowa, Iowa City, IA 52242, USA;
- Department of Pathology, University of Iowa, Iowa City, IA 52242, USA
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9
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Retention force and deformation of an innovative attachment model for mini-implant–retained overdentures. J Prosthet Dent 2019; 121:129-134. [DOI: 10.1016/j.prosdent.2018.04.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2017] [Revised: 04/09/2018] [Accepted: 04/10/2018] [Indexed: 11/18/2022]
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10
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Hufendiek A, Lingier S, Du Prez FE. Thermoplastic polyacetals: chemistry from the past for a sustainable future? Polym Chem 2019. [DOI: 10.1039/c8py01219a] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
This review serves as a guide to the synthesis and applications of thermoplastic polyacetals, highlighting in particular sustainability and degradability aspects.
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Affiliation(s)
- Andrea Hufendiek
- Polymer Chemistry Research Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
| | - Sophie Lingier
- Polymer Chemistry Research Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
| | - Filip E. Du Prez
- Polymer Chemistry Research Group
- Centre of Macromolecular Chemistry (CMaC)
- Department of Organic and Macromolecular Chemistry
- Ghent University
- B-9000 Ghent
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11
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Brannigan RP, Walder A, Dove AP. Application of functional diols derived from pentaerythritol as chain extenders in the synthesis of novel thermoplastic polyester-urethane elastomers. Polym Chem 2019. [DOI: 10.1039/c9py00951e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Functional thermoplastic poly(ester-urethane)s (TPEUs) reported herein offer a wide range of thermal, mechanical and degradation properties which can be fine-tuned through a selection of post-polymerisation reactions.
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Affiliation(s)
- Ruairí P. Brannigan
- Department of Chemistry
- University of Warwick
- Coventry
- UK
- Department of Chemistry
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12
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Englert C, Brendel JC, Majdanski TC, Yildirim T, Schubert S, Gottschaldt M, Windhab N, Schubert US. Pharmapolymers in the 21st century: Synthetic polymers in drug delivery applications. Prog Polym Sci 2018. [DOI: 10.1016/j.progpolymsci.2018.07.005] [Citation(s) in RCA: 70] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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13
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Sarmiento-Sánchez JI, Picos-Corrales LA. Synthetic approaches involving cyclic acetal groups for the design of biodegradable and biocompatible polymers (microreview). Chem Heterocycl Compd (N Y) 2018. [DOI: 10.1007/s10593-018-2329-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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14
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Bernard M, Jubeli E, Pungente MD, Yagoubi N. Biocompatibility of polymer-based biomaterials and medical devices – regulations,in vitroscreening and risk-management. Biomater Sci 2018; 6:2025-2053. [DOI: 10.1039/c8bm00518d] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Biomaterials play an increasing role in modern health care systems.
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Affiliation(s)
- Mélisande Bernard
- Paris-Sud University
- Faculty of Pharmacy
- EA 401
- “Groupe Matériaux et Santé”
- Paris
| | - Emile Jubeli
- Paris-Sud University
- Faculty of Pharmacy
- EA 401
- “Groupe Matériaux et Santé”
- Paris
| | | | - Najet Yagoubi
- Paris-Sud University
- Faculty of Pharmacy
- EA 401
- “Groupe Matériaux et Santé”
- Paris
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15
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Zhou H, Gawlik A, Hernandez C, Goss M, Mansour J, Exner A. Nondestructive Characterization of Biodegradable Polymer Erosion in Vivo Using Ultrasound Elastography Imaging. ACS Biomater Sci Eng 2016; 2:1005-1012. [DOI: 10.1021/acsbiomaterials.6b00128] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | | | | | | | - Joseph Mansour
- Department
of Mechanical and Aerospace Engineering, Case Western Reserve University, 2123 Martin Luther King Jr. Drive, Cleveland, Ohio 44106, United States
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16
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Yin R, Zhang N, Wu W, Wang K. Poly(ethylene glycol)-grafted cyclic acetals based polymer networks with non-water-swellable, biodegradable and surface hydrophilic properties. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 62:137-43. [DOI: 10.1016/j.msec.2016.01.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Revised: 01/04/2016] [Accepted: 01/15/2016] [Indexed: 10/22/2022]
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17
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Newman MR, Benoit DS. Local and targeted drug delivery for bone regeneration. Curr Opin Biotechnol 2016; 40:125-132. [PMID: 27064433 DOI: 10.1016/j.copbio.2016.02.029] [Citation(s) in RCA: 58] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2016] [Revised: 02/17/2016] [Accepted: 02/23/2016] [Indexed: 01/08/2023]
Abstract
While experimental bone regeneration approaches commonly employ cells, technological hurdles prevent translation of these therapies. Alternatively, emulating the spatiotemporal cascade of endogenous factors through controlled drug delivery may provide superior bone regenerative approaches. Surgically placed drug depots have clinical indications. Additionally, noninvasive systemic delivery can be used as needed for poorly healing bone injuries. However, a major hurdle for systemic delivery is poor bone biodistribution of drugs. Thus, peptides, aptamers, and phosphate-rich compounds with specificity toward proteins, cells, and molecules within the regenerative bone microenvironment may enable the design of targeted carriers with bone biodistribution greater than that achieved by drug alone. These carriers, combined with osteoregenerative drugs and/or stimuli-sensitive linkers, may enhance bone regeneration while minimizing off-target tissue effects.
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Affiliation(s)
- Maureen R Newman
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, USA; Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, USA
| | - Danielle Sw Benoit
- Department of Biomedical Engineering, University of Rochester, Rochester, NY, USA; Center for Musculoskeletal Research, University of Rochester Medical Center, Rochester, NY, USA; Department of Chemical Engineering, University of Rochester, Rochester, NY, USA.
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18
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Sahoo AR, Jiang F, Bruneau C, Sharma GVM, Suresh S, Achard M. Acetals from primary alcohols with the use of tridentate proton responsive phosphinepyridonate iridium catalysts. RSC Adv 2016. [DOI: 10.1039/c6ra23946c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The association of the new phosphinepyridonate ligands along with an iridium metallic precursor resulted in the selective acetalization of various primary alcohols via a formal dehydrogenative coupling reaction.
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Affiliation(s)
- A. R. Sahoo
- UMR6226
- Institut des Sciences Chimiques de Rennes
- Université de Rennes1
- OMC: Organometallics: Materials and Catalysis
- 35042 Rennes Cedex
| | - F. Jiang
- UMR6226
- Institut des Sciences Chimiques de Rennes
- Université de Rennes1
- OMC: Organometallics: Materials and Catalysis
- 35042 Rennes Cedex
| | - C. Bruneau
- UMR6226
- Institut des Sciences Chimiques de Rennes
- Université de Rennes1
- OMC: Organometallics: Materials and Catalysis
- 35042 Rennes Cedex
| | - G. V. M. Sharma
- Organic and Biomolecular Chemistry Division
- CSIR-IICT
- Hyderabad-500007
- India
| | - S. Suresh
- Organic and Biomolecular Chemistry Division
- CSIR-IICT
- Hyderabad-500007
- India
| | - M. Achard
- UMR6226
- Institut des Sciences Chimiques de Rennes
- Université de Rennes1
- OMC: Organometallics: Materials and Catalysis
- 35042 Rennes Cedex
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19
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Loth R, Loth T, Schwabe K, Bernhardt R, Schulz-Siegmund M, Hacker MC. Highly adjustable biomaterial networks from three-armed biodegradable macromers. Acta Biomater 2015; 26:82-96. [PMID: 26277378 DOI: 10.1016/j.actbio.2015.08.008] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 07/30/2015] [Accepted: 08/11/2015] [Indexed: 12/01/2022]
Abstract
Biocompatible material platforms with adjustable properties and option for chemical modification are warranted for site-specific biomedical applications. To this end, three-armed biodegradable macromers of well-defined chemical characteristics were prepared from trivalent alcohols with different degrees of ethoxylation and different lengths of oligoester domains. A platform of 15 different macromers was established. The macromers were designed to exhibit different hydrophilicities and molecular weights and contained various types of oligoesters such as d,l-lactide, l-lactide and ε-caprolactone. Macromers chemical composition was determined and molecular weights ranged from 900 to 3000 Da. Thermally induced cross-linking of methacrylated macromers was monitored by oscillation rheology. A novel variant of the solid lipid templating technique was established to fabricate macroporous tissue engineering scaffolds from these macromers. Scaffold properties were thoroughly investigated regarding mechanical properties, compositional analysis including methacrylic double bond conversion, microstructure and porosity. Material properties could be controlled by macromer chemistry. By variation of the fabrication procedure and processing parameters scaffold porosity was increased up to 88%. Basic cytocompatibility was assessed including indirect and direct contact methods. The established macromers hold promise for various biomedical purposes. STATEMENT OF SIGNIFICANCE Specific biomedical applications require tailored biomaterials with defined properties. We established a macromer platform for preparation of tissue engineering scaffolds with adjustable chemical and mechanical characteristics. Macromers were composed of trivalent core alcohols with different degrees of ethoxylation to which biodegradable domains - lactide or ε-caprolactone - were oligomerized before final methacrylation. The solid lipid templating technique was adapted to fabricate macroporous scaffolds with controlled pore structure and porosity from the developed macromers, which can also be processed by solid freeform fabrication techniques. The material platform relies on clinically established chemistries of the biodegradable domains and the macromer concept enables the fabrication of networks in which cross-polymerization kinetics, mechanical properties and surface hydrophobicity is predefined by macromer chemistry. Cytocompatibility was confirmed by indirect and direct cell contact experiments.
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Affiliation(s)
- Rudi Loth
- Institute of Pharmacy, Pharmaceutical Technology, Leipzig University, Eilenburger Str. 15a, D-04317 Leipzig, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany
| | - Tina Loth
- Institute of Pharmacy, Pharmaceutical Technology, Leipzig University, Eilenburger Str. 15a, D-04317 Leipzig, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany
| | - Katharina Schwabe
- Institute of Pharmacy, Pharmaceutical Technology, Leipzig University, Eilenburger Str. 15a, D-04317 Leipzig, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany
| | - Ricardo Bernhardt
- Max-Bergmann-Center of Biomaterials, Dresden, University of Technology, Budapester Str. 27, D-01062 Dresden, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany
| | - Michaela Schulz-Siegmund
- Institute of Pharmacy, Pharmaceutical Technology, Leipzig University, Eilenburger Str. 15a, D-04317 Leipzig, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany
| | - Michael C Hacker
- Institute of Pharmacy, Pharmaceutical Technology, Leipzig University, Eilenburger Str. 15a, D-04317 Leipzig, Germany; Collaborative Research Center (SFB/Transregio 67), Matrixengineering, Leipzig and Dresden, Germany.
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20
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Wang Y, Zheng J, Tian Y, Yang W. Acid degradable poly(vinylcaprolactam)-based nanogels with ketal linkages for drug delivery. J Mater Chem B 2015; 3:5824-5832. [DOI: 10.1039/c5tb00703h] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We developed acid degradable P(VCL-ketal-HPMA) nanogels for drug delivery via precipitation polymerization using ketal-bonded DMAEP as a cross-linker and hydrophilic HPMA as a comonomer.
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Affiliation(s)
- Yang Wang
- State Key Laboratory of Molecular Engineering of Polymers & Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
- Department of Biological and Chemical Engineering
| | - Jin Zheng
- State Key Laboratory of Molecular Engineering of Polymers & Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Yefei Tian
- State Key Laboratory of Molecular Engineering of Polymers & Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
| | - Wuli Yang
- State Key Laboratory of Molecular Engineering of Polymers & Department of Macromolecular Science
- Fudan University
- Shanghai 200433
- China
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21
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In-situ dispersed photopolymerization of cyclic acetals/hydroxyapatite composites: Effects of the content of hydroxyapatite. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 46:239-45. [DOI: 10.1016/j.msec.2014.10.040] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2013] [Revised: 08/16/2014] [Accepted: 10/19/2014] [Indexed: 11/22/2022]
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22
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Toyota T, Banno T, Nitta S, Takinoue M, Nomoto T, Natsume Y, Matsumura S, Fujinami M. Molecular Building Blocks and Their Architecture in Biologically/Environmentally Compatible Soft Matter Chemical Machinery. J Oleo Sci 2014; 63:1085-98. [DOI: 10.5650/jos.ess14190] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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23
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Binauld S, Stenzel MH. Acid-degradable polymers for drug delivery: a decade of innovation. Chem Commun (Camb) 2013; 49:2082-102. [DOI: 10.1039/c2cc36589h] [Citation(s) in RCA: 312] [Impact Index Per Article: 28.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
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Fernandes LA, Häfliger P, Azadmehr M, Johannessen E. Design and Characterization of an Osmotic Sensor for the Detection of Events Associated with Dehydration and Overhydration. IEEE JOURNAL OF TRANSLATIONAL ENGINEERING IN HEALTH AND MEDICINE-JTEHM 2013; 1:2700309. [PMID: 27170856 PMCID: PMC4839332 DOI: 10.1109/jtehm.2013.2279105] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Revised: 03/01/2013] [Accepted: 07/24/2013] [Indexed: 02/03/2023]
Abstract
The level of hydration in the human body is carefully adjusted to control the electrolyte balance that governs the biochemical processes that sustain life. An electrolyte deficiency caused by de- or overhydration will not only limit human performance, but can also lead to serious health problems and death if left untreated. Because humans can withstand a change in hydration of only \documentclass[12pt]{minimal}
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}{}${\pm}{20\%}$\end{document}, frequent monitoring should be performed in risk groups. This paper presents an osmotic hydration sensor that can record the level of hydration as a function of osmotic pressure in phosphate buffered saline or sodium-chloride solutions that simulate the interstitial fluid in the body. The osmotic pressure is recorded with the aid of an ion-exchange membrane that facilitates the migration of water and cations, in favor of reverse osmosis or gas separation membranes. The hydration sensor is designed to be coupled to an inductively powered readout circuit designed for integration in a micro-implant that has previously been shown to consume only 76 \documentclass[12pt]{minimal}
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}{}$\mu{\rm W}$\end{document} of power. The dynamic range spans a state of serious overhydration (220 \documentclass[12pt]{minimal}
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}{}${\rm mOsm} {\rm L}^{-1}$\end{document}) to a serious state of dehydration (340 \documentclass[12pt]{minimal}
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}{}${\rm mOsm} {\rm L}^{-1}$\end{document}) with a response time of \documentclass[12pt]{minimal}
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}{}${\sim}{\rm 7} {\rm h}$\end{document} (for a variation of hydration of 20%).
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Affiliation(s)
- Luís André Fernandes
- HiVe (Vestfold University College) Department of Micro- and Nano Systems Technology Faculty of Technology and Maritime Sciences Tønsberg Norway 3103
| | | | - Mehdi Azadmehr
- HiVe (Vestfold University College) Department of Micro- and Nano Systems Technology Faculty of Technology and Maritime Sciences Tønsberg Norway 3103
| | - Erik Johannessen
- HiVe (Vestfold University College) Department of Micro- and Nano Systems Technology Faculty of Technology and Maritime Sciences Tønsberg Norway 3103
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25
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Cheng J, Ji R, Gao SJ, Du FS, Li ZC. Facile Synthesis of Acid-Labile Polymers with Pendent Ortho Esters. Biomacromolecules 2011; 13:173-9. [DOI: 10.1021/bm201410c] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Jing Cheng
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics
of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic
of China
| | - Ran Ji
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics
of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic
of China
| | - Shi-Juan Gao
- CAS Key Laboratory
of Pathogenic
Microbiology and Immunology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, People's
Republic of China
| | - Fu-Sheng Du
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics
of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic
of China
| | - Zi-Chen Li
- Beijing National Laboratory
for Molecular Sciences, Key Laboratory of Polymer Chemistry and Physics
of Ministry of Education, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, People's Republic
of China
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26
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Luhmann T, Germershaus O, Groll J, Meinel L. Bone targeting for the treatment of osteoporosis. J Control Release 2011; 161:198-213. [PMID: 22016072 DOI: 10.1016/j.jconrel.2011.10.001] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2011] [Revised: 10/01/2011] [Accepted: 10/03/2011] [Indexed: 11/19/2022]
Abstract
Osteoporosis represents a major public health burden especially considering the aging populations worldwide. Drug targeting will be important to better meet these challenges and direct the full therapeutic potential of therapeutics to their intended site of action. This review has been organized in modules, such that scientists working in the field can easily gain specific insight in the field of bone targeting for the drug class they are interested in. We review currently approved and emerging treatment options for osteoporosis and discuss these in light of the benefit these would gain from advanced targeting. In addition, established targeting strategies are reviewed and novel opportunities as well as promising areas are presented along with pharmaceutical strategies how to render novel composites consisting of a drug and a targeting moiety responsive to bone-specific or disease-specific environmental stimuli. Successful implementation of these principles into drug development programs for osteoporosis will substantially contribute to the clinical success of anti-catabolic and anabolic drugs of the future.
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Affiliation(s)
- Tessa Luhmann
- Institute for Pharmacy and Food Chemistry, University of Wurzburg, Am Hubland, DE-97074 Wurzburg, Germany
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27
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Artzi N, Oliva N, Puron C, Shitreet S, Artzi S, bon Ramos A, Groothuis A, Sahagian G, Edelman ER. In vivo and in vitro tracking of erosion in biodegradable materials using non-invasive fluorescence imaging. NATURE MATERIALS 2011; 10:704-9. [PMID: 21857678 PMCID: PMC3160718 DOI: 10.1038/nmat3095] [Citation(s) in RCA: 134] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2011] [Accepted: 07/11/2011] [Indexed: 05/20/2023]
Abstract
The design of erodible biomaterials relies on the ability to program the in vivo retention time, which necessitates real-time monitoring of erosion. However, in vivo performance cannot always be predicted by traditional determination of in vitro erosion, and standard methods sacrifice samples or animals, preventing sequential measures of the same specimen. We harnessed non-invasive fluorescence imaging to sequentially follow in vivo material-mass loss to model the degradation of materials hydrolytically (PEG:dextran hydrogel) and enzymatically (collagen). Hydrogel erosion rates in vivo and in vitro correlated, enabling the prediction of in vivo erosion of new material formulations from in vitro data. Collagen in vivo erosion was used to infer physiologic in vitro conditions that mimic erosive in vivo environments. This approach enables rapid in vitro screening of materials, and can be extended to simultaneously determine drug release and material erosion from a drug-eluting scaffold, or cell viability and material fate in tissue-engineering formulations.
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Affiliation(s)
- Natalie Artzi
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, E25-449, 77 Massachusetts Ave., Cambridge, Massachusetts 02139, USA.
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28
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Pok S, Jacot JG. Biomaterials Advances in Patches for Congenital Heart Defect Repair. J Cardiovasc Transl Res 2011; 4:646-54. [DOI: 10.1007/s12265-011-9289-8] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2011] [Accepted: 05/26/2011] [Indexed: 11/24/2022]
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29
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Chatterjee S, Ramakrishnan S. Hyperbranched Polyacetals with Tunable Degradation Rates. Macromolecules 2011. [DOI: 10.1021/ma2004663] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Saptarshi Chatterjee
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - S. Ramakrishnan
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
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30
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Patel M, Dunn TA, Tostanoski S, Fisher JP. Cyclic acetal hydroxyapatite composites and endogenous osteogenic gene expression of rat marrow stromal cells. J Tissue Eng Regen Med 2011; 4:422-36. [PMID: 20047194 DOI: 10.1002/term.252] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
In this study, bone marrow stromal cells (BMSCs) were differentiated on cyclic acetal composites containing hydroxyapatite (HA) particles (110 or 550 nm). These composites were evaluated for their role in influencing osteogenic signalling by encapsulated BMSCs. While a number of factors exert influence on osteogenic signalling during the production of an osteogenic matrix, we hypothesize that HA particles may upregulate bone growth factor expression due to enhanced BMSC adhesion. To this end, fluorescence-activated cell sorting (FACS) analysis was performed for the evaluation of BMSC surface marker expression after culture on two-dimensional (2D) cyclic acetal/HA composites. Three-dimensional (3D) composites were then fabricated by incorporating 110 or 550 nm HA particles at 5, 10 and 50 ng/ml concentrations. Bone growth factor molecules (TGFbeta1, FGF-2 and PDGFa), bone biomarker molecules (ALP, OC, OPN and OCN) and extracellular matrix-related molecules (FN, MMP-13, Dmp1 and aggrecan) were selected for evaluation of osteogenic signalling mechanisms when in presence of these composites. FACS results at day 0 demonstrated that BMSCs were a heterogeneous population with a small percentage of cells staining positive for CD29, CD90 and CD51/61, while staining negative for CD34 and CD45. At day 3, a significant enrichment of cells staining strongly for CD29, CD90 and CD51/61 was achieved. Gene expression patterns for bone growth factors and extracellular matrix molecules were found to be largely dependent upon the size of HA particles. Bone marker molecules, except OCN, had unaltered expression patterns in response to the varied size of HA particles. Overall, the results indicate that larger-sized HA particles upregulate PDGF and these groups were also associated with the most significant increase in osteodifferentiation markers, particularly ALP. Our results suggest that endogenous signalling is dependent upon material properties. Furthermore, we propose that studying gene expression patterns induced by the surrounding biomaterials environment is a fundamental step in the creation of engineered tissues.
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Affiliation(s)
- Minal Patel
- Fischell Department of Bioengineering, University of Maryland, College Park, MD 20742, USA
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31
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Falco EE, Wang MO, Thompson JA, Chetta JM, Yoon DM, Li EZ, Kulkami MM, Shah S, Pandit A, Roth JS, Fisher JP. Porous EH and EH-PEG scaffolds as gene delivery vehicles to skeletal muscle. Pharm Res 2011; 28:1306-16. [PMID: 21246395 DOI: 10.1007/s11095-010-0358-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 12/17/2010] [Indexed: 11/30/2022]
Abstract
PURPOSE Synthetic biomaterials are widely used in an attempt to control the cellular behavior of regenerative tissues. This can be done by altering the chemical and physical properties of the polymeric scaffold to guide tissue repair. This paper addresses the use of a polymeric scaffold (EH network) made from the cyclic acetal monomer, 5-ethyl-5-(hydroxymethyl)-β,β-dimethyl-1,3-dioxane-2-ethanol diacrylate (EHD), as a release device for a therapeutic plasmid encoding for an insulin-like growth factor-1 green fluorescent protein fusion protein (IGF-1 GFP). METHODS Scaffolds were designed to have different porous architectures, and the impact of these architectures on plasmid release was determined. We hypothesized that IGF-1 could be delivered more effectively using a porous scaffold to allow for the release of IGF-1. RESULTS We showed that by altering the number of pores exposed to the surface of the network, faster plasmid loading and release were achieved. In addition, the IGF-1 GFP plasmids were found to be effective in producing IGF-1 and GFP within human skeletal muscle myoblast cell cultures. CONCLUSIONS This work aims to show the utility of EH biomaterials for plasmid delivery for potentially localized skeletal muscle regeneration.
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Affiliation(s)
- Erin E Falco
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, Maryland 20742, USA
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32
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Reid B, Tzeng S, Warren A, Kozielski K, Elisseeff J. Development of a PEG Derivative Containing Hydrolytically Degradable Hemiacetals. Macromolecules 2010; 43:9588-9590. [PMID: 23293395 DOI: 10.1021/ma1020648] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Branden Reid
- Johns Hopkins University, Smith Bldg. 5031, 400 N. Broadway, Baltimore, MD 21231
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33
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Xiao P, Lalevée J, Allonas X, Fouassier J, Ley C, El-Roz M, Shi SQ, Nie J. Photoinitiation mechanism of free radical photopolymerization in the presence of cyclic acetals and related compounds. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24383] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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34
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Patel M, Patel KJ, Caccamese JF, Coletti DP, Sauk JJ, Fisher JP. Characterization of cyclic acetal hydroxyapatite nanocomposites for craniofacial tissue engineering. J Biomed Mater Res A 2010; 94:408-18. [PMID: 20186741 DOI: 10.1002/jbm.a.32683] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Cyclic acetal hydrogels are a novel group of biomaterials which may facilitate osteogenic differentiation of encapsulated bone marrow stromal cells (BMSCs) because of their neutral degradation products. Here, we have incorporated hydroxyapatite nanoparticles within cyclic acetal hydrogels to create cyclic acetal nanocomposites for craniofacial tissue engineering applications. We hypothesized that inclusion of nanosized hydroxyapatite particles within cyclic acetal hydrogels would upregulate osteogenic signal expression of encapsulated BMSCs, due to enhanced cell adhesion, and therefore promote osteodifferentiation. Experimental nanocomposite groups consisted of lower (5 ng/mL) and higher (50 ng/mL) concentrations of nanoparticles. The nanocomposites were characterized by scanning electron microscopy, transmission electron microscopy, and energy dispersive spectroscopy. Swelling parameters of hydrogels in the presence of nanoparticles was studied. Osteoblastic differentiation was characterized by alkaline phosphatase (ALP) and osteocalcin (OC) expression, whereas endogenous osteogenic signal expression was characterized by morphogenetic protein-2 (BMP-2) expression. Finally, immunohistochemistry was performed to detect the presence of OC at the protein level. Results indicated that hydroxyapatite nanoparticles were uniformly distributed throughout the hydrogels and did not affect material properties of the gels. Viability of cells was not affected by nanoparticle concentration, and BMP-2 and OC mRNA expression was enhanced in the presence of nanoparticles. However, a difference in BMP-2, ALP, and OC mRNA expression was not noted between the lower and higher concentrations of nanoparticles. This work demonstrates that inclusion of hydroxyapatite nanoparticles within a cyclic acetal nanocomposite hydrogel may enhance BMSC differentiation by promoting endogenous osteogenic signal expression.
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Affiliation(s)
- Minal Patel
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, USA
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35
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Chen CW, Betz MW, Fisher JP, Paek A, Chen Y. Macroporous hydrogel scaffolds and their characterization by optical coherence tomography. Tissue Eng Part C Methods 2010; 17:101-12. [PMID: 20666607 DOI: 10.1089/ten.tec.2010.0072] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
A simple porogen-leaching method to fabricate macroporous cyclic acetal hydrogel cell scaffolds is presented. Optical coherence tomography (OCT) was applied for nondestructive imaging and quantitative characterization of the scaffold structures. High-resolution OCT reveals the microstructures of the engineered tissue scaffolds in three dimensions. It also enables subsequent image processing to investigate quantitatively several key morphological design parameters for macroporous scaffolds, including the volume porosity, pore interconnectivity, and pore size. Two image-processing algorithms were adapted: three-dimensional labeling was applied to assess the interconnectivity, and erosion was applied to assess the pore size. Scaffolds with different design parameters were imaged, characterized, and compared. OCT imaging and image processing successfully discriminated scaffolds made from different formulations in terms of volume porosity, interconnectivity, and pore size. The cell viability and their spread across the scaffolds were confirmed by the fluorescence microscopy co-registered with OCT.
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Affiliation(s)
- Chao-Wei Chen
- 1 Department of Electrical and Computer Engineering, University of Maryland , College Park, MD 20742, USA.
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36
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Kohman RE, Cha C, Zimmerman SC, Kong H. Tuning hydrogel properties and function using substituent effects. SOFT MATTER 2010; 6:2150-2152. [PMID: 20694176 PMCID: PMC2915463 DOI: 10.1039/c001548b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The physical properties and function of hydrogels are shown to depend on the substituents present in three novel 1,3,5-tri-azaadamantane (TAA) cross-linkers. Gel stiffness and degradation rate at varied pHs could be predictably tuned with the cross-linker substituents used to form the gel. Subsequently, protein release from the hydrogel were controlled with chemical structure of the cross-linker.
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Affiliation(s)
- Richie E. Kohman
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 W. Gregory Drive, Urbana, IL, 61801, USA
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, IL, 61801, USA
| | - Chaenyung Cha
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 W. Gregory Drive, Urbana, IL, 61801, USA
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, IL, 61801, USA
| | - Steven C. Zimmerman
- Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, IL, 61801, USA
| | - Hyunjoon Kong
- Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, 600 S. Mathews Avenue, Urbana, IL, 61801, USA; Fax: (+1) 217-333-5052
- Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 1206 W. Gregory Drive, Urbana, IL, 61801, USA
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37
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Patel M, Betz MW, Geibel E, Patel KJ, Caccamese JF, Coletti DP, Sauk JJ, Fisher JP. Cyclic Acetal Hydroxyapatite Nanocomposites for Orbital Bone Regeneration. Tissue Eng Part A 2010; 16:55-65. [DOI: 10.1089/ten.tea.2009.0027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Minal Patel
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - Martha W. Betz
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
| | - Elyse Geibel
- Department of Psychology, University of Maryland, College Park, Maryland
| | - Ketan J. Patel
- Department of Oral and Maxillofacial Surgery, University of Maryland Dental School, Baltimore, Maryland
| | - John F. Caccamese
- Department of Oral and Maxillofacial Surgery, University of Maryland Dental School, Baltimore, Maryland
| | - Domenick P. Coletti
- Department of Oral and Maxillofacial Surgery, University of Maryland Dental School, Baltimore, Maryland
| | - John J. Sauk
- School of Dentistry, University of Louisville, Louisville, Kentucky
| | - John P. Fisher
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland
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38
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Rikkou MD, Loizou E, Porcar L, Butler P, Patrickios CS. Degradable Amphiphilic End-Linked Conetworks with Aqueous Degradation Rates Determined by Polymer Topology. Macromolecules 2009. [DOI: 10.1021/ma902099c] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Maria D. Rikkou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Elena Loizou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Lionel Porcar
- Institut Laue-Langevin, B. P. 156, F-38042 Grenoble, Cedex 9, France
| | - Paul Butler
- Center for Neutron Research, National Institute of Standards and Technology, Bldg 235, E151, 100 Bureau Drive STOP 6102, Gaithersburg, Maryland 20899-6102
| | - Costas S. Patrickios
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
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39
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Falco EE, Roth JS, Fisher JP. Skeletal muscle tissue engineering approaches to abdominal wall hernia repair. ACTA ACUST UNITED AC 2009; 84:315-21. [PMID: 19067424 DOI: 10.1002/bdrc.20134] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Abdominal wall hernias resulting from prior incisions are a common surgical complication affecting hundreds of thousands of Americans each year. The negative consequences associated with abdominal hernias may be considerable, including pain, bowel incarceration, vascular disruption, organ loss, and death. Current clinical approaches for the treatment of abdominal wall hernias focus on the implantation of permanent biomaterial meshes or acellular xenografts. However, these approaches are not infrequently associated with postoperative infections, chronic sinuses, or small bowel obstruction. Furthermore, the most critical complication, hernia recurrence, has been well described and may occur in a large percentage of patients. Despite many advances in repair techniques, wound healing and skeletal muscle regeneration is limited in many cases, resulting in a decrease in abdominal wall tissue function and contributing to the high hernia recurrence rate. This review will give an overview of skeletal muscle anatomy, skeletal muscle regeneration, and herniation mechanisms, as well as discuss the current and future clinical solutions for abdominal wall hernia repair.
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Affiliation(s)
- Erin E Falco
- Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20742, USA
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