51
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Yang W, Li L, Su G, Zhang Z, Cao Y, Li X, Shi Y, Zhang Q. A collagen telopeptide binding peptide shows potential in aiding collagen bundle formation and fibril orientation. Biomater Sci 2017. [DOI: 10.1039/c6bm00574h] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A double-armed CTBP-PEG-CTBP derivative of a collagen telopeptide binding peptide (CTBP), shows potential in aiding collagen bundle formation and fibril orientation by interacting with fibrils.
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Affiliation(s)
- Wenyu Yang
- The Key Laboratory of Biomedical Material of Tianjin
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences
- Peking Union Medical College
- Tianjin
| | - Lin Li
- The Key Laboratory of Biomedical Material of Tianjin
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences
- Peking Union Medical College
- Tianjin
| | - Guanghao Su
- The Key Laboratory of Biomedical Material of Tianjin
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences
- Peking Union Medical College
- Tianjin
| | - Zhe Zhang
- The Key Laboratory of Biomedical Material of Tianjin
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences
- Peking Union Medical College
- Tianjin
| | - Yiting Cao
- The Key Laboratory of Biomedical Material of Tianjin
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences
- Peking Union Medical College
- Tianjin
| | - Xuemin Li
- The Key Laboratory of Biomedical Material of Tianjin
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences
- Peking Union Medical College
- Tianjin
| | - Yanping Shi
- School of Chemistry and Chemical Engineering
- Tianjin University of Technology
- Tianjin
- PR China
| | - Qiqing Zhang
- The Key Laboratory of Biomedical Material of Tianjin
- Institute of Biomedical Engineering
- Chinese Academy of Medical Sciences
- Peking Union Medical College
- Tianjin
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52
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Noh HJ, Noh YW, Heo MB, Kim EH, Park SJ, Kim YI, Choi YK, Lim YT. Injectable and Pathogen-Mimicking Hydrogels for Enhanced Protective Immunity against Emerging and Highly Pathogenic Influenza Virus. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2016; 12:6279-6288. [PMID: 27671946 DOI: 10.1002/smll.201602344] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 08/19/2016] [Indexed: 05/28/2023]
Abstract
Seasonal emerging infectious diseases such as influenza A impose substantial risk and need new translational strategies to achieve active immunomodulation. Here, a novel injectable pathogen-mimicking hydrogel (iPMH) that can enhance both cellular and humoral immune responses is suggested. By the help of poly(γ-glutamic acid) that has abundant carboxylate groups and dispersion helper function, hydrophobic immunostimulatory 3-O-desacyl-4'-monophosphoryl lipid A (MPLA) molecules and viral antigens (PR8, W150) can be successfully combined as pathogen-mimicking adjuvants. Polyelectrolyte complex between the poly(γ-glutamic acid)-based adjuvants and collagens generate in situ gel-forming hydrogel at physiological temperature. When the iPMH are immunized, they act as a pathogen-mimicking (MPLA, H1N1, H5N1) immune priming center and a depot for continuous stimulation of immune system, resulting in the induction of high levels (8.5 times higher) of antigen-specific IgG titers in the sera of mice and the increased number of IFN-γ-producing cells (7.3 times higher) compared with those in the groups immunized with antigen plus clinically used aluminum gels. Following the intranasal infection of the mouse adapted virus (emerging infectious 2009 H1N1 and highly pathogenic 2006 H5N1) at 50 times the 50% lethal dose, the mice immunized with viral antigens plus iPMH exhibit 100% protective immunity against lethal virus challenge.
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Affiliation(s)
- Hyun Jong Noh
- SKKU Advanced Institute of Nanotechnology, School of Chemical Engineering, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Young-Woock Noh
- SKKU Advanced Institute of Nanotechnology, School of Chemical Engineering, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Min Beom Heo
- SKKU Advanced Institute of Nanotechnology, School of Chemical Engineering, Sungkyunkwan University, Suwon, 16419, South Korea
| | - Eun-Ha Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Chengju, 28644, South Korea
| | - Su-Jin Park
- College of Medicine and Medical Research Institute, Chungbuk National University, Chengju, 28644, South Korea
| | - Young-Il Kim
- College of Medicine and Medical Research Institute, Chungbuk National University, Chengju, 28644, South Korea
| | - Young Ki Choi
- College of Medicine and Medical Research Institute, Chungbuk National University, Chengju, 28644, South Korea
| | - Yong Taik Lim
- SKKU Advanced Institute of Nanotechnology, School of Chemical Engineering, Sungkyunkwan University, Suwon, 16419, South Korea
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53
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Despanie J, Dhandhukia JP, Hamm-Alvarez SF, MacKay JA. Elastin-like polypeptides: Therapeutic applications for an emerging class of nanomedicines. J Control Release 2016; 240:93-108. [PMID: 26578439 PMCID: PMC5767577 DOI: 10.1016/j.jconrel.2015.11.010] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 11/06/2015] [Accepted: 11/09/2015] [Indexed: 02/06/2023]
Abstract
Elastin-like polypeptides (ELPs) constitute a genetically engineered class of 'protein polymers' derived from human tropoelastin. They exhibit a reversible phase separation whereby samples remain soluble below a transition temperature (Tt) but form amorphous coacervates above Tt. Their phase behavior has many possible applications in purification, sensing, activation, and nanoassembly. As humanized polypeptides, they are non-immunogenic, substrates for proteolytic biodegradation, and can be decorated with pharmacologically active peptides, proteins, and small molecules. Recombinant synthesis additionally allows precise control over ELP architecture and molecular weight, resulting in protein polymers with uniform physicochemical properties suited to the design of multifunctional biologics. As such, ELPs have been employed for various uses including as anti-cancer agents, ocular drug delivery vehicles, and protein trafficking modulators. This review aims to offer the reader a catalogue of ELPs, their various applications, and potential for commercialization across a broad spectrum of fields.
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Affiliation(s)
- Jordan Despanie
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 90033-9121, USA
| | - Jugal P Dhandhukia
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 90033-9121, USA
| | - Sarah F Hamm-Alvarez
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 90033-9121, USA; Department of Ophthalmology, University of Southern California, Los Angeles, CA, 90033, USA
| | - J Andrew MacKay
- Department of Pharmacology and Pharmaceutical Sciences, University of Southern California, Los Angeles, CA 90033-9121, USA; Department of Biomedical Engineering, University of Southern California, Los Angeles, CA 90089, USA.
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54
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Jalili NA, Muscarello M, Gaharwar AK. Nanoengineered thermoresponsive magnetic hydrogels for biomedical applications. Bioeng Transl Med 2016; 1:297-305. [PMID: 29313018 PMCID: PMC5689536 DOI: 10.1002/btm2.10034] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Revised: 08/18/2016] [Accepted: 08/26/2016] [Indexed: 01/03/2023] Open
Abstract
“Smart” hydrogels are part of an emerging class of biomaterials that respond to multiple external stimuli. A range of thermoresponsive magnetic hydrogels is currently being developed for on‐demand delivery of biomolecules for a range of biomedical applications, including therapeutic drug delivery, bioimaging, and regenerative engineering. In this review article, we explore different types of magnetic nanoparticles and thermoresponsive polymers used to fabricate these smart nanoengineered hydrogels. We highlight some of the emerging applications of these stimuli‐responsive hydrogels for biomedical applications. Finally, we capture the growing trend of these smart nanoengineered hydrogels and will identify promising new research directions.
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Affiliation(s)
- Nima A Jalili
- Dept. of Biomedical Engineering Texas A&M University, College Station TX 77843
| | - Madyson Muscarello
- Dept. of Biomedical Engineering Texas A&M University, College Station TX 77843
| | - Akhilesh K Gaharwar
- Dept. of Biomedical Engineering Texas A&M University, College Station TX 77843.,Dept. of Materials Science and Engineering Texas A&M University, College Station TX 77843.,Center for Remote Health Technologies and Systems, Texas A&M University, College Station TX 77843
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55
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Biomimetic mineralization of recombinant collagen type I derived protein to obtain hybrid matrices for bone regeneration. J Struct Biol 2016; 196:138-146. [PMID: 27374321 DOI: 10.1016/j.jsb.2016.06.025] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Revised: 06/22/2016] [Accepted: 06/29/2016] [Indexed: 11/24/2022]
Abstract
Understanding the mineralization mechanism of synthetic protein has recently aroused great interest especially in the development of advanced materials for bone regeneration. Herein, we propose the synthesis of composite materials through the mineralization of a recombinant collagen type I derived protein (RCP) enriched with RGD sequences in the presence of magnesium ions (Mg) to closer mimic bone composition. The role of both RCP and Mg ions in controlling the precipitation of the mineral phase is in depth evaluated. TEM and X-ray powder diffraction reveal the crystallization of nanocrystalline apatite (Ap) in all the evaluated conditions. However, Raman spectra point out also the precipitation of amorphous calcium phosphate (ACP). This amorphous phase is more evident when RCP and Mg are at work, indicating the synergistic role of both in stabilizing the amorphous precursor. In addition, hybrid matrices are prepared to tentatively address their effectiveness as scaffolds for bone tissue engineering. SEM and AFM imaging show an homogeneous mineral distribution on the RCP matrix mineralized in presence of Mg, which provides a surface roughness similar to that found in bone. Preliminary in vitro tests with pre-osteoblast cell line show good cell-material interaction on the matrices prepared in the presence of Mg. To the best of our knowledge this work represents the first attempt to mineralize recombinant collagen type I derived protein proving the simultaneous effect of the organic phase (RCP) and Mg on ACP stabilization. This study opens the possibility to engineer, through biomineralization process, advanced hybrid matrices for bone regeneration.
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56
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Collagen interactions: Drug design and delivery. Adv Drug Deliv Rev 2016; 97:69-84. [PMID: 26631222 DOI: 10.1016/j.addr.2015.11.013] [Citation(s) in RCA: 158] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Revised: 11/19/2015] [Accepted: 11/20/2015] [Indexed: 12/25/2022]
Abstract
Collagen is a major component in a wide range of drug delivery systems and biomaterial applications. Its basic physical and structural properties, together with its low immunogenicity and natural turnover, are keys to its biocompatibility and effectiveness. In addition to its material properties, the collagen triple-helix interacts with a large number of molecules that trigger biological events. Collagen interactions with cell surface receptors regulate many cellular processes, while interactions with other ECM components are critical for matrix structure and remodeling. Collagen also interacts with enzymes involved in its biosynthesis and degradation, including matrix metalloproteinases. Over the past decade, much information has been gained about the nature and specificity of collagen interactions with its partners. These studies have defined collagen sequences responsible for binding and the high-resolution structures of triple-helical peptides bound to its natural binding partners. Strategies to target collagen interactions are already being developed, including the use of monoclonal antibodies to interfere with collagen fibril formation and the use of triple-helical peptides to direct liposomes to melanoma cells. The molecular information about collagen interactions will further serve as a foundation for computational studies to design small molecules that can interfere with specific interactions or target tumor cells. Intelligent control of collagen biological interactions within a material context will expand the effectiveness of collagen-based drug delivery.
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57
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Islam MM, Ravichandran R, Olsen D, Ljunggren MK, Fagerholm P, Lee CJ, Griffith M, Phopase J. Self-assembled collagen-like-peptide implants as alternatives to human donor corneal transplantation. RSC Adv 2016. [DOI: 10.1039/c6ra08895c] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
PEG-conjugated collagen-like peptides promote corneal regeneration in a pig cornea.
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Affiliation(s)
- M. Mirazul Islam
- Swedish Medical Nanoscience Center
- Dept. of Neurosciences
- Karolinska Institutet
- S-17177 Stockholm
- Sweden
| | - R. Ravichandran
- Dept. of Physics
- Chemistry and Biology (IFM)
- Linköping University
- S-58183 Linköping
- Sweden
| | - D. Olsen
- FibroGen Incorporated
- San Francisco
- USA
| | - M. K. Ljunggren
- Dept. of Clinical and Experimental Medicine
- Linköping University
- S-58185 Linköping
- Sweden
| | - Per Fagerholm
- Dept. of Clinical and Experimental Medicine
- Linköping University
- S-58185 Linköping
- Sweden
| | - C. J. Lee
- Dept. of Clinical and Experimental Medicine
- Linköping University
- S-58185 Linköping
- Sweden
- Dept. of Physics
| | - M. Griffith
- Swedish Medical Nanoscience Center
- Dept. of Neurosciences
- Karolinska Institutet
- S-17177 Stockholm
- Sweden
| | - J. Phopase
- Dept. of Physics
- Chemistry and Biology (IFM)
- Linköping University
- S-58183 Linköping
- Sweden
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58
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Grijalvo S, Puras G, Zárate J, Pons R, Pedraz JL, Eritja R, Díaz DD. Nioplexes encapsulated in supramolecular hybrid biohydrogels as versatile delivery platforms for nucleic acids. RSC Adv 2016. [DOI: 10.1039/c6ra01005a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Supramolecular hydrogels based on N-protected phenylalanine (Fmoc–Phe–OH) were used to encapsulate non-ionic surfactant vesicles (niosomes).
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Affiliation(s)
- Santiago Grijalvo
- Institute of Organic Chemistry
- University of Regensburg
- D-93040 Regensburg
- Germany
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC)
| | - Gustavo Puras
- Biomedical Research Networking Center in Bioengineering
- Biomaterials and Nanomedicine (CIBER BBN)
- Spain
- NanoBioCel group
- University of the Basque Country (EHU-UPV)
| | - Jon Zárate
- Biomedical Research Networking Center in Bioengineering
- Biomaterials and Nanomedicine (CIBER BBN)
- Spain
- NanoBioCel group
- University of the Basque Country (EHU-UPV)
| | - Ramon Pons
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC)
- Spain
| | - Jose Luis Pedraz
- Biomedical Research Networking Center in Bioengineering
- Biomaterials and Nanomedicine (CIBER BBN)
- Spain
- NanoBioCel group
- University of the Basque Country (EHU-UPV)
| | - Ramon Eritja
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC)
- Spain
- Biomedical Research Networking Center in Bioengineering
- Biomaterials and Nanomedicine (CIBER BBN)
- Spain
| | - David Díaz Díaz
- Institute of Organic Chemistry
- University of Regensburg
- D-93040 Regensburg
- Germany
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC)
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59
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Luo T, Kiick KL. Noncovalent Modulation of the Inverse Temperature Transition and Self-Assembly of Elastin-b-Collagen-like Peptide Bioconjugates. J Am Chem Soc 2015; 137:15362-5. [PMID: 26633746 PMCID: PMC4930074 DOI: 10.1021/jacs.5b09941] [Citation(s) in RCA: 66] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Stimuli-responsive nanostructures produced with peptide domains from the extracellular matrix offer great opportunities for imaging and drug delivery. Although the individual utility of elastin-like (poly)peptides and collagen-like peptides in such applications has been demonstrated, the synergistic advantages of combining these motifs in short peptide conjugates have surprisingly not been reported. Here, we introduce the conjugation of a thermoresponsive elastin-like peptide (ELP) with a triple-helix-forming collagen-like peptide (CLP) to yield ELP-CLP conjugates that show a remarkable reduction in the inverse transition temperature of the ELP domain upon formation of the CLP triple helix. The lower transition temperature of the conjugate enables the facile formation of well-defined vesicles at physiological temperature and the unexpected resolubilization of the vesicles at elevated temperatures upon unfolding of the CLP domain. Given the demonstrated ability of CLPs to modify collagens, our results not only provide a simple and versatile avenue for controlling the inverse transition behavior of ELPs, but also suggest future opportunities for these thermoresponsive nanostructures in biologically relevant environments.
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Affiliation(s)
- Tianzhi Luo
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, United States
| | - Kristi L. Kiick
- Department of Materials Science and Engineering, University of Delaware, Newark, Delaware 19716, United States
- Department of Biomedical Engineering, University of Delaware, Newark, Delaware 19716, United States
- Delaware Biotechnology Institute, Newark, Delaware 19711, United States
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60
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Ellison AJ, VanVeller B, Raines RT. Convenient synthesis of collagen-related tripeptides for segment condensation. Biopolymers 2015; 104:674-81. [PMID: 26172437 PMCID: PMC4713359 DOI: 10.1002/bip.22700] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 06/23/2015] [Accepted: 07/04/2015] [Indexed: 11/09/2022]
Abstract
Chromatography is a common step in the solution-phase synthesis of typical peptides, as well as peptide fragments for subsequent coupling on a solid support. Combining known reagents that form readily separable byproducts is shown to eliminate this step, which wastes time and other resources. Specifically, activating carboxyl groups with isobutyl chloroformate or as pentafluorophenyl esters and using N-methyl morpholine as a base enable chromatography-free synthetic routes in which peptide products are isolated from byproducts by facile evaporation, extraction, and trituration. This methodology was used to access tripeptides related to collagen, such as Fmoc-Pro-Pro-Gly-OH and Fmoc-Pro-Hyp(tBu)-Gly-OH, in a purity suitable for solid-phase segment condensation to form collagen mimetic peptides.
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Affiliation(s)
- Aubrey J. Ellison
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706-1322
| | - Brett VanVeller
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706-1322
| | - Ronald T. Raines
- Department of Chemistry, University of Wisconsin–Madison, 1101 University Avenue, Madison, WI 53706-1322
- Department of Biochemistry, University of Wisconsin–Madison, 433 Babcock Drive, Madison, WI 53706-1544
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61
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Ahadian S, Sadeghian RB, Salehi S, Ostrovidov S, Bae H, Ramalingam M, Khademhosseini A. Bioconjugated Hydrogels for Tissue Engineering and Regenerative Medicine. Bioconjug Chem 2015; 26:1984-2001. [DOI: 10.1021/acs.bioconjchem.5b00360] [Citation(s) in RCA: 99] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Samad Ahadian
- WPI-Advanced
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Ramin Banan Sadeghian
- WPI-Advanced
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Sahar Salehi
- WPI-Advanced
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Serge Ostrovidov
- WPI-Advanced
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - Hojae Bae
- College
of Animal Bioscience and Technology, Department of Bioindustrial Technologies, Konkuk University, Hwayang-dong,
Kwangjin-gu, Seoul 143-701, Republic of Korea
| | - Murugan Ramalingam
- WPI-Advanced
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
- Centre
for Stem Cell Research, Institute for Stem Cell Biology and Regenerative Medicine, Christian Medical College Campus, Vellore 632002, India
| | - Ali Khademhosseini
- WPI-Advanced
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
- College
of Animal Bioscience and Technology, Department of Bioindustrial Technologies, Konkuk University, Hwayang-dong,
Kwangjin-gu, Seoul 143-701, Republic of Korea
- Department
of Medicine, Center for Biomedical Engineering, Brigham and Women’s Hospital, Harvard Medical School, Cambridge, Massachusetts 02139, United States
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
- Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, Massachusetts 02115, United States
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62
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Lau HK, Kiick KL. Opportunities for multicomponent hybrid hydrogels in biomedical applications. Biomacromolecules 2015; 16:28-42. [PMID: 25426888 PMCID: PMC4294583 DOI: 10.1021/bm501361c] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 11/14/2014] [Indexed: 02/08/2023]
Abstract
Hydrogels provide mechanical support and a hydrated environment that offer good cytocompatibility and controlled release of molecules, and myriad hydrogels thus have been studied for biomedical applications. In the past few decades, research in these areas has shifted increasingly to multicomponent hydrogels that better capture the multifunctional nature of native biological environments and that offer opportunities to selectively tailor materials properties. This review summarizes recent approaches aimed at producing multicomponent hydrogels, with descriptions of contemporary chemical and physical approaches for forming networks, and of the use of both synthetic and biologically derived molecules to impart desired properties. Specific multicomponent materials with enhanced mechanical properties are presented, as well as materials in which multiple biological functions are imparted for applications in tissue engineering, cancer treatment, and gene therapies. The progress in the field suggests significant promise for these approaches in the development of biomedically relevant materials.
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Affiliation(s)
- Hang Kuen Lau
- Department of Materials Science and Engineering and ‡Biomedical Engineering, University of Delaware , Newark Delaware 19716, United States
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63
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Luo T, He L, Theato P, Kiick KL. Thermoresponsive self-assembly of nanostructures from a collagen-like peptide-containing diblock copolymer. Macromol Biosci 2014; 15:111-23. [PMID: 25393381 DOI: 10.1002/mabi.201400358] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 09/08/2014] [Indexed: 12/18/2022]
Abstract
Temperature-triggered formation of nanostructures with distinct biological activity offers opportunities in selective modification of matrices and in drug delivery. Toward these ends, diblock polymers comprising poly(diethylene glycol methyl ether methacrylate) (PDEGMEMA) conjugated to a triple helix-forming collagen-like peptide were produced. Triggered by the collapse of the thermoresponsive domain above its LCST, the conjugate undergoes a reversible transition in aqueous solution to form well-defined nanovesicles with diameters of approximately 100 nm, with a transition temperature of 37 °C. The incorporation of CLP domains in these nanostructures may offer opportunities for the selective targeting of collagen-containing matrices.
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Affiliation(s)
- Tianzhi Luo
- Department of Materials Science and Engineering, University of Delaware, Newark, DE, 19716, USA
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64
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Ghosal K, Latha MS, Thomas S. Poly(ester amides) (PEAs) – Scaffold for tissue engineering applications. Eur Polym J 2014. [DOI: 10.1016/j.eurpolymj.2014.08.006] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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65
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Dewavrin JY, Hamzavi N, Shim VPW, Raghunath M. Tuning the architecture of three-dimensional collagen hydrogels by physiological macromolecular crowding. Acta Biomater 2014; 10:4351-9. [PMID: 24932771 DOI: 10.1016/j.actbio.2014.06.006] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2014] [Revised: 06/03/2014] [Accepted: 06/06/2014] [Indexed: 12/13/2022]
Abstract
Macromolecular crowding is an optimal physiological feature in intracellular and extracellular spaces, and results from a variety of macromolecules occupying space and contributing to a fractional volume occupancy. Here, we show that soft collagen hydrogels assembled in nature-inspired crowded conditions feature enhanced biophysical properties. We demonstrate that crowding tunes the rate of collagen nucleation and fiber growth, affecting fiber diameter and organization. Adjustments of crowding levels during collagen assembly tune the gel pore size, protein permeability, transparency and resistance to enzymatic degradation. Furthermore, gels assembled in crowded conditions are twice as resistant to mechanical stress as the controls, inducing a 70% boost of proliferation of stem cells cultured on tuned hydrogels. Emulating the crowdedness of interstitial fluids therefore represents a way to optimize the properties of soft collagen gels, with promising applications in soft biomaterials design.
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Affiliation(s)
- Jean-Yves Dewavrin
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, Singapore; NUS Tissue Engineering Programme, National University of Singapore, Singapore; NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore
| | - Nader Hamzavi
- Impact Mechanics Laboratory, Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, Singapore; A∗STAR Institute of Microelectronics, Singapore
| | - V P W Shim
- Impact Mechanics Laboratory, Department of Mechanical Engineering, Faculty of Engineering, National University of Singapore, Singapore
| | - Michael Raghunath
- Department of Biomedical Engineering, Faculty of Engineering, National University of Singapore, Singapore; NUS Tissue Engineering Programme, National University of Singapore, Singapore; NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, Singapore; Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.
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66
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