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Sadraddin A. Synthesis and characterization of novel thermoresponsive suspensions via physical adsorption of poly[di(ethylene glycol) methyl methacrylate] onto polystyrene microparticles. Des Monomers Polym 2023; 26:163-170. [PMID: 37181151 PMCID: PMC10173789 DOI: 10.1080/15685551.2023.2211356] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Accepted: 05/03/2023] [Indexed: 05/16/2023] Open
Abstract
Thermoreversible colloidal suspensions/gels have attracted recent research attention in the field of biomedical applications. In this study, a novel thermoresponsive particle suspension with thermoreversible gelation properties has been prepared for biomedical application. First, polystyrene (PS) microspheres were synthesized by dispersion polymerization and poly diethyleneglycolmethylmethacrylate (PDEGMA) polymer were synthesized via free radical polymerisation. Then, the new developed thermoresponsive suspensions were prepared via physical adsorption of a thermoresponsive polymer, poly[di (ethylene glycol) methyl methacrylate] (PDEGMA), onto the surface of polystyrene microspheres. PDEGMA acts as a steric stabilizer and induces thermoreversible gelation via chain extending and collapsing below and above its lower critical solution temperature (LCST), respectively. Scanning electron microscopy (SEM), 1H NMR spectroscopy, Gel permeation chromatography (GPC), UV-vis spectroscopy, Rheometric measurement were conducted to characterize the prepared particles, polymers and suspensions. SEM images show that monodisperse microspheres with the sizes range 1.5-3.5 μm were prepared. UV-vis measurements demonstrate thermoresponsive properties of PDEGMA. 1H NMR and GPC analysis confirms structural properties of prepared PDEGMA. Tube inversion tests demonstrated that the aqueous suspensions of the particles and polymer exhibited thermoreversible fluid-to-gel transitions. Rheological characterization revealed that the viscoelastic properties of the prepared suspension/gels can be fine tuned. This enables applications of the prepared gels as scaffolds for three-dimensional (3D) cell cultures.
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Affiliation(s)
- Azad Sadraddin
- Chemistry Department, Education College, Salahaddin University, Iraqi kurdistan, Iraq
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2
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Gao XD, Zhang XB, Zhang RH, Yu DC, Chen XY, Hu YC, Chen L, Zhou HY. Aggressive strategies for regenerating intervertebral discs: stimulus-responsive composite hydrogels from single to multiscale delivery systems. J Mater Chem B 2022; 10:5696-5722. [PMID: 35852563 DOI: 10.1039/d2tb01066f] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
As our research on the physiopathology of intervertebral disc degeneration (IVD degeneration, IVDD) has advanced and tissue engineering has rapidly evolved, cell-, biomolecule- and nucleic acid-based hydrogel grafting strategies have been widely investigated for their ability to overcome the harsh microenvironment of IVDD. However, such single delivery systems suffer from excessive external dimensions, difficult performance control, the need for surgical implantation, and difficulty in eliminating degradation products. Stimulus-responsive composite hydrogels have good biocompatibility and controllable mechanical properties and can undergo solution-gel phase transition under certain conditions. Their combination with ready-to-use particles to form a multiscale delivery system may be a breakthrough for regenerative IVD strategies. In this paper, we focus on summarizing the progress of research on the stimulus response mechanisms of regenerative IVD-related biomaterials and their design as macro-, micro- and nanoparticles. Finally, we discuss multi-scale delivery systems as bioinks for bio-3D printing technology for customizing personalized artificial IVDs, which promises to take IVD regenerative strategies to new heights.
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Affiliation(s)
- Xi-Dan Gao
- Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, Gansu 730000, P. R. China.
| | - Xiao-Bo Zhang
- Department of Spine Surgery, Honghui Hospital, Xi'an Jiao tong University, Shaanxi 710000, P. R. China.
| | - Rui-Hao Zhang
- Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, Gansu 730000, P. R. China.
| | - De-Chen Yu
- Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, Gansu 730000, P. R. China.
| | - Xiang-Yi Chen
- Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, Gansu 730000, P. R. China.
| | - Yi-Cun Hu
- Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, Gansu 730000, P. R. China.
| | - Lang Chen
- Department of Gastrointestinal Surgery, Lanzhou University Second Hospital, Lanzhou, Gansu 730000, P. R. China
| | - Hai-Yu Zhou
- Department of Orthopaedics, Lanzhou University Second Hospital, Lanzhou, Gansu 730000, P. R. China.
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3
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Rheology Applied to Microgels: Brief (Revision of the) State of the Art. Polymers (Basel) 2022; 14:polym14071279. [PMID: 35406152 PMCID: PMC9003433 DOI: 10.3390/polym14071279] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/18/2022] [Accepted: 03/18/2022] [Indexed: 12/10/2022] Open
Abstract
The ability of polymer microgels to rapidly respond to external stimuli is of great interest in sensors, lubricants, and biomedical applications, among others. In most of their uses, microgels are subjected to shear, deformation, and compression forces or a combination of them, leading to variations in their rheological properties. This review article mainly refers to the rheology of microgels, from the hard sphere versus soft particles' model. It clearly describes the scaling theories and fractal structure formation, in particular, the Shih et al. and Wu and Morbidelli models as a tool to determine the interactions among microgel particles and, thus, the viscoelastic properties. Additionally, the most recent advances on the characterization of microgels' single-particle interactions are also described. The review starts with the definition of microgels, and a brief introduction addresses the preparation and applications of microgels and hybrid microgels.
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4
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Kasiński A, Zielińska-Pisklak M, Oledzka E, Sobczak M. Smart Hydrogels - Synthetic Stimuli-Responsive Antitumor Drug Release Systems. Int J Nanomedicine 2020; 15:4541-4572. [PMID: 32617004 PMCID: PMC7326401 DOI: 10.2147/ijn.s248987] [Citation(s) in RCA: 76] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2020] [Accepted: 03/28/2020] [Indexed: 12/19/2022] Open
Abstract
Among modern drug formulations, stimuli-responsive hydrogels also called "smart hydrogels" deserve a special attention. The basic feature of this system is the ability to change their mechanical properties, swelling ability, hydrophilicity, bioactive molecules permeability, etc., influenced by various stimuli, such as temperature, pH, electromagnetic radiation, magnetic field and biological factors. Therefore, stimuli-responsive matrices can be potentially used in tissue engineering, cell cultures and technology of innovative drug delivery systems (DDSs), releasing the active substances under the control of internal or external stimuli. Moreover, smart hydrogels can be used as injectable DDSs, due to gel-sol transition connected with in situ cross-linking process. Innovative smart hydrogel DDSs can be utilized as matrices for targeted therapy, which enhances the effectiveness of tumor chemotherapy and subsequently limits systemic toxicity. External stimulus sensitivity allows remote control over the drug release profile and gel formation. On the other hand, internal factors provide drg accumulation in tumor tissue and reduce the concentration of active drug form in healthy tissue. In this report, we summarise the basic knowledge and chemical strategies for the synthetic smart hydrogel DDSs applied in antitumor therapy.
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Affiliation(s)
- Adam Kasiński
- Department of Biomaterials Chemistry, Chair of Analytical Chemistry and Biomaterials, Faculty of Pharmacy, Medical University of Warsaw, Warsaw02-097, Poland
| | - Monika Zielińska-Pisklak
- Department of Biomaterials Chemistry, Chair of Analytical Chemistry and Biomaterials, Faculty of Pharmacy, Medical University of Warsaw, Warsaw02-097, Poland
| | - Ewa Oledzka
- Department of Biomaterials Chemistry, Chair of Analytical Chemistry and Biomaterials, Faculty of Pharmacy, Medical University of Warsaw, Warsaw02-097, Poland
| | - Marcin Sobczak
- Department of Biomaterials Chemistry, Chair of Analytical Chemistry and Biomaterials, Faculty of Pharmacy, Medical University of Warsaw, Warsaw02-097, Poland
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5
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Kovács AN, Varga N, Gombár G, Hornok V, Csapó E. Novel feasibilities for preparation of serum albumin-based core-shell nanoparticles in flow conditions. J Flow Chem 2020. [DOI: 10.1007/s41981-020-00088-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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6
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Echeverría C, Mijangos C. A Way to Predict Gold Nanoparticles/Polymer Hybrid Microgel Agglomeration Based on Rheological Studies. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E1499. [PMID: 31640156 PMCID: PMC6835908 DOI: 10.3390/nano9101499] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/10/2019] [Revised: 10/09/2019] [Accepted: 10/11/2019] [Indexed: 12/12/2022]
Abstract
In this work, a detailed rheological study of hybrid poly(acrylamide-co-acrylic acid) P(AAm-co-AAc) aqueous microgel dispersions is performed. Our intention is to understand how the presence of gold nanoparticles, AuNP, embedded within the microgel matrix, affects the viscoelastic properties, the colloidal gel structure formation, and the structure recovery after cessation of the deformation of the aqueous microgel dispersions. Frequency sweep experiments confirmed that hybrid microgel dispersions present a gel-like behavior and that the presence of AuNP content within microgel matrix contributes to the elasticity of the microgel dispersions. Strain sweep test confirmed that hybrid microgels aqueous dispersion also form colloidal gel structures that break upon deformation but that can be recovered when the deformation decreases. The fractal analysis performed to hybrid microgels, by applying Shih et al. and Wu and Morbidelli's scaling theories, evidenced that AuNP significantly affects the colloidal gel structure configuration ending up with the formation of agglomerates or microgel clusters with closer structures in comparison to the reference P(AAm-co-AAc) aqueous microgel dispersions.
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Affiliation(s)
- Coro Echeverría
- Institute of Polymer Science and Technology (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.
| | - Carmen Mijangos
- Institute of Polymer Science and Technology (ICTP-CSIC), C/Juan de la Cierva 3, 28006 Madrid, Spain.
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7
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Shanks HR, Milani AH, Lu D, Saunders BR, Carney L, Adlam DJ, Hoyland JA, Blount C, Dickinson M. Core-Shell-Shell Nanoparticles for NIR Fluorescence Imaging and NRET Swelling Reporting of Injectable or Implantable Gels. Biomacromolecules 2019; 20:2694-2702. [PMID: 31185170 PMCID: PMC7007186 DOI: 10.1021/acs.biomac.9b00463] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 05/31/2019] [Indexed: 11/29/2022]
Abstract
Injectable gels that support load are desirable for restoring the mechanical properties of degenerated load-bearing tissue. As these gels become increasingly sophisticated, the need to remotely image them and monitor their swelling increases. However, imaging such gels and monitoring their swelling using noninvasive means is challenging. Here, we use a very low concentration of near-infrared (NIR) core-shell-shell (CSS) reporter nanoparticles to both image and monitor swelling changes of two load-supporting gels. The load-supporting injectable gel consisted of covalently interlinked pH-responsive microgel (MG) particles. The latter gel was not cytotoxic and is termed a doubly cross-linked microgel (DX MG). Inclusion of a complementary fluorescent dye enabled ratiometric monitoring of gel swelling changes in response to pH via nonradiative resonance energy transfer (NRET). In addition, changes in the CSS nanoparticle emission intensity provided a NIR-only method that could also be used to monitor gel swelling. The gel was able to be imaged using NIR light, after being subcutaneously injected into a tissue model. To demonstrate versatility of our approach, CSS and the dye were included within a model implantable gel (poly(acrylamide/acrylic acid)) and fluorescent detection of swelling investigated. Because the concentrations of the reporting species were too low to affect the mechanical properties, our approach to remote gel imaging and swelling monitoring has good potential for application in injectable gels and implants.
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Affiliation(s)
- Hannah R. Shanks
- School
of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, U.K.
| | - Amir H. Milani
- School
of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, U.K.
| | - Dongdong Lu
- School
of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, U.K.
| | - Brian R. Saunders
- School
of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, U.K.
| | - Louise Carney
- School
of Materials, University of Manchester, MSS Tower, Manchester, M13 9PL, U.K.
| | - Daman J. Adlam
- Division
of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology,
Medicine and Health, University of Manchester, Oxford Road, Manchester, M13 9PT, U.K.
| | - Judith A. Hoyland
- Division
of Cell Matrix Biology and Regenerative Medicine, Faculty of Biology,
Medicine and Health, University of Manchester, Oxford Road, Manchester, M13 9PT, U.K.
- NIHR
Manchester Biomedical Research Centre, Manchester University NHS Foundation
Trust, Manchester Academic Health Science
Centre, Manchester, M20 2LR, U.K.
| | - Christopher Blount
- Photon
Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
- School
of Physics & Astronomy, University of
Manchester, Oxford Road, Manchester, M13 9PL, U.K.
| | - Mark Dickinson
- Photon
Science Institute, University of Manchester, Oxford Road, Manchester, M13 9PL, U.K.
- School
of Physics & Astronomy, University of
Manchester, Oxford Road, Manchester, M13 9PL, U.K.
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8
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Gao W, Zhang Y, Zhang Q, Zhang L. Nanoparticle-Hydrogel: A Hybrid Biomaterial System for Localized Drug Delivery. Ann Biomed Eng 2016; 44:2049-61. [PMID: 26951462 DOI: 10.1007/s10439-016-1583-9] [Citation(s) in RCA: 140] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2016] [Accepted: 02/26/2016] [Indexed: 12/20/2022]
Abstract
Nanoparticles have offered a unique set of properties for drug delivery including high drug loading capacity, combinatorial delivery, controlled and sustained drug release, prolonged stability and lifetime, and targeted delivery. To further enhance therapeutic index, especially for localized application, nanoparticles have been increasingly combined with hydrogels to form a hybrid biomaterial system for controlled drug delivery. Herein, we review recent progresses in engineering such nanoparticle-hydrogel hybrid system (namely 'NP-gel') with a particular focus on its application for localized drug delivery. Specifically, we highlight four research areas where NP-gel has shown great promises, including (1) passively controlled drug release, (2) stimuli-responsive drug delivery, (3) site-specific drug delivery, and (4) detoxification. Overall, integrating therapeutic nanoparticles with hydrogel technologies creates a unique and robust hybrid biomaterial system that enables effective localized drug delivery.
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Affiliation(s)
- Weiwei Gao
- Department of Nanoengineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Yue Zhang
- Department of Nanoengineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Qiangzhe Zhang
- Department of Nanoengineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA, 92093, USA
| | - Liangfang Zhang
- Department of Nanoengineering and Moores Cancer Center, University of California, San Diego, La Jolla, CA, 92093, USA.
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9
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Braim SA, Shakesheff KM, Saunders BR, Alexander C. Thermoresponsive magnetic colloidal gels via surface-initiated polymerisation from functional microparticles. J Mater Chem B 2016; 4:962-972. [DOI: 10.1039/c5tb01739d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Novel magnetothermally responsive core–shell microparticles have been synthesized.
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Affiliation(s)
- S. A. Braim
- School of Pharmacy
- University of Nottingham
- Nottingham
- UK
| | | | | | - C. Alexander
- School of Pharmacy
- University of Nottingham
- Nottingham
- UK
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10
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Behrens AM, Lee NG, Casey BJ, Srinivasan P, Sikorski MJ, Daristotle JL, Sandler AD, Kofinas P. Biodegradable-Polymer-Blend-Based Surgical Sealant with Body-Temperature-Mediated Adhesion. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:8056-61. [PMID: 26554545 PMCID: PMC4961426 DOI: 10.1002/adma.201503691] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 09/30/2015] [Indexed: 05/20/2023]
Abstract
The development of practical and efficient surgical sealants has the propensity to improve operational outcomes. A biodegradable polymer blend is fabricated as a nonwoven fiber mat in situ. After direct deposition onto the tissue of interest, the material transitions from a fiber mat to a film. This transition promotes polymer-substrate interfacial interactions leading to improved adhesion and surgical sealant performance.
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Affiliation(s)
- Adam M. Behrens
- Fischell Department of Bioengineering, 2330 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD, USA
| | - Nora G. Lee
- Sheikh Zayed Institute for Pediatric Surgical Innovation, Children’s National Medical Center, 111 Michigan Avenue, NW Washington, DC, USA
| | - Brendan J. Casey
- Office of Medical Products and Tobacco, Center for Devices and Radiological Health, Office of Science and Engineering Laboratories, Division of Biology, Chemistry and Materials Science, US Food and Drug Administration, 10903 New Hampshire Avenue, Silver Spring, MD, USA
| | - Priya Srinivasan
- Sheikh Zayed Institute for Pediatric Surgical Innovation, Children’s National Medical Center, 111 Michigan Avenue, NW Washington, DC, USA
| | - Michael J. Sikorski
- Fischell Department of Bioengineering, 2330 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD, USA
| | - John L. Daristotle
- Fischell Department of Bioengineering, 2330 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD, USA
| | - Anthony D. Sandler
- Sheikh Zayed Institute for Pediatric Surgical Innovation, Children’s National Medical Center, 111 Michigan Avenue, NW Washington, DC, USA
| | - Peter Kofinas
- Fischell Department of Bioengineering, 2330 Jeong H. Kim Engineering Building, University of Maryland, College Park, MD, USA
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11
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Blanquer SBG, Grijpma DW, Poot AA. Delivery systems for the treatment of degenerated intervertebral discs. Adv Drug Deliv Rev 2015; 84:172-87. [PMID: 25451138 DOI: 10.1016/j.addr.2014.10.024] [Citation(s) in RCA: 81] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 08/29/2014] [Accepted: 10/20/2014] [Indexed: 12/25/2022]
Abstract
The intervertebral disc (IVD) is the most avascular and acellular tissue in the body and therefore prone to degeneration. During IVD degeneration, the balance between anabolic and catabolic processes in the disc is deregulated, amongst others leading to alteration of extracellular matrix production, abnormal enzyme activities and production of pro-inflammatory substances like cytokines. The established treatment strategy for IVD degeneration consists of physiotherapy, pain medication by drug therapy and if necessary surgery. This approach, however, has shown limited success. Alternative strategies to increase and prolong the effects of bioactive agents and to reverse the process of IVD degeneration include the use of delivery systems for drugs, proteins, cells and genes. In view of the specific anatomy and physiology of the IVD and depending on the strategy of the therapy, different delivery systems have been developed which are reviewed in this article.
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Affiliation(s)
- S B G Blanquer
- MIRA Institute for Biomedical Technology and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands; Collaborative Research Partner Annulus Fibrosus Rupture Program of AO Foundation, Davos, Switzerland
| | - D W Grijpma
- MIRA Institute for Biomedical Technology and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands; Collaborative Research Partner Annulus Fibrosus Rupture Program of AO Foundation, Davos, Switzerland; University of Groningen, University Medical Center Groningen, W.J. Kolff Institute, Department of Biomedical Engineering, P.O. Box 196, 9700 AD Groningen, The Netherlands.
| | - A A Poot
- MIRA Institute for Biomedical Technology and Technical Medicine, Department of Biomaterials Science and Technology, University of Twente, P.O. Box 217, 7500 AE Enschede, The Netherlands; Collaborative Research Partner Annulus Fibrosus Rupture Program of AO Foundation, Davos, Switzerland
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12
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Biomimetic approaches in bone tissue engineering: Integrating biological and physicomechanical strategies. Adv Drug Deliv Rev 2015; 84:1-29. [PMID: 25236302 DOI: 10.1016/j.addr.2014.09.005] [Citation(s) in RCA: 265] [Impact Index Per Article: 29.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 09/01/2014] [Accepted: 09/05/2014] [Indexed: 02/06/2023]
Abstract
The development of responsive biomaterials capable of demonstrating modulated function in response to dynamic physiological and mechanical changes in vivo remains an important challenge in bone tissue engineering. To achieve long-term repair and good clinical outcomes, biologically responsive approaches that focus on repair and reconstitution of tissue structure and function through drug release, receptor recognition, environmental responsiveness and tuned biodegradability are required. Traditional orthopedic materials lack biomimicry, and mismatches in tissue morphology, or chemical and mechanical properties ultimately accelerate device failure. Multiple stimuli have been proposed as principal contributors or mediators of cell activity and bone tissue formation, including physical (substrate topography, stiffness, shear stress and electrical forces) and biochemical factors (growth factors, genes or proteins). However, optimal solutions to bone regeneration remain elusive. This review will focus on biological and physicomechanical considerations currently being explored in bone tissue engineering.
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13
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Yunker PJ, Chen K, Gratale MD, Lohr MA, Still T, Yodh AG. Physics in ordered and disordered colloidal matter composed of poly(N-isopropylacrylamide) microgel particles. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2014; 77:056601. [PMID: 24801604 DOI: 10.1088/0034-4885/77/5/056601] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
This review collects and describes experiments that employ colloidal suspensions to probe physics in ordered and disordered solids and related complex fluids. The unifying feature of this body of work is its clever usage of poly(N-isopropylacrylamide) (PNIPAM) microgel particles. These temperature-sensitive colloidal particles provide experimenters with a 'knob' for in situ control of particle size, particle interaction and particle packing fraction that, in turn, influence the structural and dynamical behavior of the complex fluids and solids. A brief summary of PNIPAM particle synthesis and properties is given, followed by a synopsis of current activity in the field. The latter discussion describes a variety of soft matter investigations including those that explore formation and melting of crystals and clusters, and those that probe structure, rearrangement and rheology of disordered (jammed/glassy) and partially ordered matter. The review, therefore, provides a snapshot of a broad range of physics phenomenology which benefits from the unique properties of responsive microgel particles.
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Affiliation(s)
- Peter J Yunker
- Department of Physics and Astronomy, University of Pennsylvania, Philadelphia, PA 19104, USA. School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, USA
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14
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Larsson E, Sanchez CC, Porsch C, Karabulut E, Wågberg L, Carlmark A. Thermo-responsive nanofibrillated cellulose by polyelectrolyte adsorption. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.05.023] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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15
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Abstract
The delivery of living cells into a host body has emerged as a promising approach to treating a variety of different diseases and for tissue repair. However, one of the major obstacles for clinical success is to deliver the cells to the target tissue without losing control of cell fate and function after transplantation. Temperature-responsive biomaterials represent a promising vehicle to deliver cells noninvasively by injection of a liquid precursor, which undergoes a reversible phase transition at body temperature, thus, forming temperature-induced hydrogels in situ. The final material provides transplanted cells with a synthetic extracellular matrix, which retains the cells at the injection site, supports cell growth and mitigates migration. This mini review is intended to cover the fundamental physicochemical characteristics of these thermoresponsive biomaterials, and to examine the applications, with a focus on the recently developed cell-delivery systems for tissue engineering and cell therapy, including advantages, limitations and future challenges.
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16
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Shahidan NN, Alexander C, Shakesheff KM, Saunders BR. Gelation of microsphere dispersions using a thermally-responsive graft polymer. J Colloid Interface Sci 2013; 396:187-96. [DOI: 10.1016/j.jcis.2013.01.025] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2012] [Revised: 01/10/2013] [Accepted: 01/11/2013] [Indexed: 02/09/2023]
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17
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Roux R, Ladavière C, Montembault A, Delair T. Particle assemblies: toward new tools for regenerative medicine. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 33:997-1007. [PMID: 23827536 DOI: 10.1016/j.msec.2012.12.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Revised: 11/14/2012] [Accepted: 12/01/2012] [Indexed: 01/22/2023]
Abstract
Regenerative medicine is a demanding field in terms of design and elaboration of materials able to meet the specifications that this application imposes. The regeneration of tissue is a multiscale issue, from the signaling molecule through cell expansion and finally tissue growth requiring a large variety of cues that should be delivered in place and time. Hence, the materials should be able to accommodate cells with respect to their phenotypes, to allow cell division to the right tissue, to maintain the integrity of the surrounding sane tissue, and eventually use their signaling machinery to serve the development of the appropriate neo-tissue. They should also present the ability to deliver growth factors and regulate tissue development, to be degraded into safe products, in order not to impede tissue development, and finally be easily implanted/injected into the patients. In this context, colloid-based materials represent a very promising family of products because one can take advantage of their high specific area, their capability to carry/deliver bio-active molecules, and their capacity of assembling (eventually in vivo) into materials featuring other mechanical, rheological, physicochemical properties. Other benefits of great interest would be their ease of production even via high through-put processes and their potential manufacturing from safe, biodegradable and biocompatible parent raw material. This review describes the state-of-the-art of processes leading to complex materials from the assembly of colloids meeting, at least partially, the above-described specifications for tissue engineering and regenerative medicine.
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Affiliation(s)
- R Roux
- Université de Lyon, Université Lyon 1, IMP@LYON1, UMR CNRS 5223, 15 bld Latarjet, 69622, Villeurbanne Cedex, France
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18
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Dong Y, Saeed AO, Hassan W, Keigher C, Zheng Y, Tai H, Pandit A, Wang W. “One-step” Preparation of Thiol-Ene Clickable PEG-Based Thermoresponsive Hyperbranched Copolymer for In Situ Crosslinking Hybrid Hydrogel. Macromol Rapid Commun 2011; 33:120-6. [DOI: 10.1002/marc.201100534] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2011] [Revised: 10/10/2011] [Indexed: 01/27/2023]
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Shahidan NN, Liu R, Cellesi F, Alexander C, Shakesheff KM, Saunders BR. Thermally triggered assembly of cationic graft copolymers containing 2-(2-methoxyethoxy)ethyl methacrylate side chains. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2011; 27:13868-13878. [PMID: 21967746 DOI: 10.1021/la203206s] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Thermoresponsive copolymers continue to attract a great deal of interest in the literature. In particular, those based on ethylene oxide-containing methacrylates have excellent potential for biomaterial applications. Recently, some of us reported a study of thermoresponsive cationic graft copolymers containing poly(N-isopropylacrylamide), PNIPAm, (Liu et al., Langmuir, 24, 7099). Here, we report an improved version of this new family of copolymers. In the present study, we replaced the PNIPAm side chains with poly(2-(2-methyoxyethoxy)ethylmethacrylate), PMeO(2)MA. These new, nonacrylamide containing, cationic graft copolymers were prepared using atom transfer radical polymerization (ATRP) and a macroinitiator. They contained poly(trimethylamonium)-aminoethyl methacrylate and PMeO(2)MA, i.e., PTMA(+)(x)-g-(PMeO(2)MA(n))(y). They were investigated using variable-temperature turbidity, photon correlation spectroscopy (PCS), electrophoretic mobility, and (1)H NMR measurements. For one system, four critical temperatures were measured and used to propose a mechanism for the thermally triggered changes that occur in solution. All of the copolymers existed as unimolecular micelles at 20 °C. They underwent reversible aggregation with heating. The extent of aggregation was controlled by the length of the side chains. TEM showed evidence of micellar aggregates. The thermally responsive behaviors of our new copolymers are compared to those for the cationic PNIPAm graft copolymers reported by Liu et al. Our new cationic copolymers retained their positive charge at all temperatures studied, have high zeta potentials at 37 °C, and are good candidates for conferring thermoresponsiveness to negatively charged biomaterial surfaces.
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Affiliation(s)
- Nur Nabilah Shahidan
- Biomaterials Research Group, The School of Materials, The University of Manchester, Grosvenor Street, M13 9PL, United Kingdom
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Koocheki S, Madaeni SS, Niroomandi P. Application of hydroxyapatite nanoparticles in development of an enhanced formulation for delivering sustained release of triamcinolone acetonide. Int J Nanomedicine 2011; 6:825-33. [PMID: 21589650 PMCID: PMC3090279 DOI: 10.2147/ijn.s18045] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2011] [Indexed: 11/23/2022] Open
Abstract
We report an analysis of in vitro and in vivo drug release from an in situ formulation consisting of triamcinolone acetonide (TR) and poly(d,l-lactide-co-glycolide) (PLGA) and the additives glycofurol (GL) and hydroxyapatite nanoparticles (HA). We found that these additives enhanced drug release rate. We used the Taguchi method to predict optimum formulation variables to minimize the initial burst. This method decreased the burst rate from 8% to 1.3%. PLGA-HA acted as a strong buffer, thereby preventing tissue inflammation at the injection site caused by the acidic degradation products of PLGA. Characterization of the optimized formulation by a variety of techniques, including scanning electron microscopy, X-ray diffraction, differential scanning calorimetry, and Fourier transform near infrared spectroscopy, revealed that the crystalline structure of TR was converted to an amorphous form. Therefore, this hydrophobic agent can serve as an additive to modify drug release rates. Data generated by in vitro and in vivo experiments were in good agreement.
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Affiliation(s)
- Saeid Koocheki
- Membrane Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran
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Colloidal thermoresponsive gel forming hybrids. J Colloid Interface Sci 2010; 349:527-36. [DOI: 10.1016/j.jcis.2010.05.080] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2010] [Revised: 05/23/2010] [Accepted: 05/25/2010] [Indexed: 11/20/2022]
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Grad S, Alini M, Eglin D, Sakai D, Mochida J, Mahor S, Collin E, Dash B, Pandit A. Cells and Biomaterials for Intervertebral Disc Regeneration. ACTA ACUST UNITED AC 2010. [DOI: 10.2200/s00250ed1v01y201006tis005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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