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Subasic CN, Ardana A, Chan LJ, Huang F, Scoble JA, Butcher NJ, Meagher L, Chiefari J, Kaminskas LM, Williams CC. Poly(HPMA-co-NIPAM) copolymer as an alternative to polyethylene glycol-based pharmacokinetic modulation of therapeutic proteins. Int J Pharm 2021; 608:121075. [PMID: 34481889 DOI: 10.1016/j.ijpharm.2021.121075] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/24/2021] [Accepted: 08/31/2021] [Indexed: 12/21/2022]
Abstract
PEGylation is the standard approach for prolonging the plasma exposure of protein therapeutics but has limitations. We explored whether polymers prepared by Reversible Addition-Fragmentation chain-Transfer (RAFT) may provide better alternatives to polyethylene glycol (PEG). Four RAFT polymers were synthesised with varying compositions, molar mass (Mn), and structures, including a homopolymer of N-(2-hydroxypropyl)methacrylamide, (pHPMA) and statistical copolymers of HPMA with poly(ethylene glycol methyl ether acrylate) p(HPMA-co-PEGA); HPMA and N-acryloylmorpholine, p(HPMA-co-NAM); and HPMA and N-isopropylacrylamide, p(HPMA-co-NIPAM). The intravenous pharmacokinetics of the polymers were then evaluated in rats. The in vitro activity and in vivo pharmacokinetics of p(HPMA-co-NIPAM)-conjugated trastuzumab Fab' and full length mAb were then evaluated. p(HPMA-co-NIPAM) prolonged plasma exposure more avidly compared to the other p(HPMA) polymers or PEG, irrespective of molecular weight. When conjugated to trastuzumab-Fab', p(HPMA-co-NIPAM) prolonged plasma exposure of the Fab' similar to PEG-Fab'. The generation of anti-PEG IgM in rats 7 days after intravenous and subcutaneous dosing of p(HPMA-co-NIPAM) conjugated trastuzumab mAb was also examined and was shown to exhibit lower immunogenicity than the PEGylated construct. These data suggest that p(HPMA-co-NIPAM) has potential as a promising copolymer for use as an alternative conjugation strategy to PEG, to prolong the plasma exposure of therapeutic proteins.
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Affiliation(s)
- Christopher N Subasic
- School of Biomedical Sciences, University of Queensland, St Lucia, QLD 4072, Australia
| | - Aditya Ardana
- CSIRO Manufacturing, 343 Royal Parade, Parkville, Victoria 3052, Australia
| | - Linda J Chan
- Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia
| | - Fei Huang
- CSIRO Manufacturing, 343 Royal Parade, Parkville, Victoria 3052, Australia
| | - Judith A Scoble
- CSIRO Manufacturing, 343 Royal Parade, Parkville, Victoria 3052, Australia
| | - Neville J Butcher
- School of Biomedical Sciences, University of Queensland, St Lucia, QLD 4072, Australia
| | - Laurence Meagher
- CSIRO Manufacturing, 343 Royal Parade, Parkville, Victoria 3052, Australia; Department of Materials Science and Engineering, Monash University, 20 Research Way, Clayton, Victoria 3168, Australia
| | - John Chiefari
- CSIRO Manufacturing, 343 Royal Parade, Parkville, Victoria 3052, Australia
| | - Lisa M Kaminskas
- School of Biomedical Sciences, University of Queensland, St Lucia, QLD 4072, Australia; Monash Institute of Pharmaceutical Sciences, Monash University, 381 Royal Parade, Parkville, Victoria 3052, Australia.
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2
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Swift T, Caseley E, Pinnock A, Shepherd J, Shivshetty N, Garg P, Ian Douglas CW, MacNeil S, Rimmer S. Branched amphotericin functional poly( N- isopropyl acrylamide): an antifungal polymer. ROYAL SOCIETY OPEN SCIENCE 2021; 8:201655. [PMID: 33614095 PMCID: PMC7890487 DOI: 10.1098/rsos.201655] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/20/2020] [Indexed: 06/12/2023]
Abstract
Branched poly(N-isopropylacrylamide) was functionalized with Amphotericin B (AmB) at the chain ends to produce an antifungal material. The polymer showed antifungal properties against AmB-sensitive strains of Candida albicans, Fusarium keratoplasticum and Aspergillus flavus (minimal inhibitory concentration ranged from 5 to 500 µg ml-1) but was not effective against an AmB resistant strain of C. albicans nor against Candida tropicalis. The polymer end groups bound to the AmB target, ergosterol, and the fluorescence spectrum of a dye used as a solvatochromic probe, Nile red, was blue shifted indicating that segments of the polymer became desolvated on binding. The polymer was less toxic to corneal and renal epithelial cells and explanted corneal tissue than the free drug. Also, the polymer did not induce reactive oxygen species release from peripheral blood mononuclear cells, nor did it cause a substantial release of the proinflammatory cytokines, tumour necrosis factor-α and interleukin-1β (at 0.5 mg ml-1).
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Affiliation(s)
- Thomas Swift
- Polymer and Biomaterial Chemistry Laboratories, School of Chemistry and Biosciences, University of Bradford, Bradford BD7 1DP, UK
| | - Emily Caseley
- Polymer and Biomaterial Chemistry Laboratories, School of Chemistry and Biosciences, University of Bradford, Bradford BD7 1DP, UK
| | - Abbigail Pinnock
- School of Dentistry, University of Sheffield, Sheffield S10 2TA, UK
- Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK
| | - Joanna Shepherd
- School of Dentistry, University of Sheffield, Sheffield S10 2TA, UK
| | | | - Prashant Garg
- LV Prasad Eye Institute, Banjara Hills, Hyderabad 500034, India
| | | | - Sheila MacNeil
- Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, Sheffield S3 7HQ, UK
| | - Stephen Rimmer
- Polymer and Biomaterial Chemistry Laboratories, School of Chemistry and Biosciences, University of Bradford, Bradford BD7 1DP, UK
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3
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Yan X, Shen K, Tang Q, Fang X, Zhang C, Zhu Z, Hou Y, Lai M. IL-4 functionalized titanium dioxide nanotubes modulate the inflammatory response of macrophages. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 31:2238-2251. [PMID: 32693732 DOI: 10.1080/09205063.2020.1799534] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Inflammatory response is an essential part of optimal tissue-implant integration and the regeneration process. Due to their highly plastic properties, macrophages display phenotypic changes during inflammatory signaling. Investigating these changes on implant surfaces is essential for evaluating implant stability and longevity. In order to control macrophage polarization, IL-4 was conjugated to titanium dioxide nanotubes (TNTs) through polydopamine, and successful fabrication was checked by scanning electron microscopy (SEM), atomic force microscopy (AFM), X-ray photoelectron spectroscopy (XPS) and contact angle, respectively. In vitro experiments including immunofluorescence staining, cell proliferation, the expression of genes associated with pro-inflammatory M1 phenotype (tumor necrosis factor-alpha (TNF-α), Interleukin-18 (IL-18)) and cytokines related to the anti-inflammatory M2 phenotype (IL-4 and IL-10), and the production of nitric oxide (NO) and cytokines TNF-α, IL-10 were detected. Macrophage response showed that IL-4 functionalized TNTs favored macrophage polarization towards an anti-inflammatory M2-phenotype. This study provides a new strategy for use in medical devices and the development of advanced nano-biomaterials in immunotherapy applications.
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Affiliation(s)
- Xufeng Yan
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing, China.,School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Ke Shen
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Qiang Tang
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Xingtang Fang
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Chunlei Zhang
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
| | - Zhaojing Zhu
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing, China
| | - Yanhua Hou
- Chongqing Engineering Research Center of Pharmaceutical Sciences, Chongqing Medical and Pharmaceutical College, Chongqing, China
| | - Min Lai
- School of Life Science, Jiangsu Normal University, Xuzhou, Jiangsu, China
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4
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Fan Z, Nie Y, Chen Z, Xie X, Liao X, Wei Y. Construction of novel temperature-responsive hydrogel culture system based on the biomimetic method for stem cell sheet harvest. J BIOACT COMPAT POL 2019. [DOI: 10.1177/0883911519841393] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Temperature-responsive hydrogel culture system is considered as an ideal platform for cell sheet harvest, but its complex preparation methods and harsh reaction conditions limit its application. Inspired by the marine mussels, a biomimetic method presented here is to construct a novel temperature-responsive hydrogel culture system for stem cell sheet harvest. The tissue culture polystyrene is first modified with polydopamine coating, and then amine-terminated poly(N-isopropylacrylamide) is grafted onto the coating via the Schiff base or Michael addition reaction to construct the temperature-sensitive hydrogel culture system. Then, bone marrow stromal cells are cultured on the culture system to construct cell sheets. The prepared culture system shows significant temperature-sensitive property with the grafted concentrations of poly(N-isopropylacrylamide) ranging from 0.5 to 1 g/L. Meanwhile, the constructed culture system has low cytotoxicity and facilitates the stem cell adhesion, proliferation, and cell sheet formation at 37°C. When the culture system is placed in a 20°C environment, the cell sheet can be completely detached from the surface of tissue culture polystyrene without being treated with any enzymes. More importantly, the cell morphology, cell sheet thickness, and the fibril structure of the associated proteins are similar to the cells cultured on the tissue culture polystyrene without modification. The biomimetic, simple, inexpensive, and environmentally friendly preparation of the culture system enables it to be used for the harvest of cell sheet and even applied to tissue engineering for tissue regeneration.
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Affiliation(s)
- Zengjie Fan
- School of Stomatology, Lanzhou University, Lanzhou, P.R. China
| | - Yingying Nie
- Institute of Sensing Technology, Gansu Academy of Sciences, Lanzhou, P.R. China
| | - Zizi Chen
- School of Stomatology, Lanzhou University, Lanzhou, P.R. China
| | - Xuzhuzi Xie
- School of Stomatology, Lanzhou University, Lanzhou, P.R. China
| | - Xiaozhu Liao
- School of Stomatology, Lanzhou University, Lanzhou, P.R. China
| | - Yuan Wei
- School of Stomatology, Lanzhou University, Lanzhou, P.R. China
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5
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An investigation of cell growth and detachment from thermoresponsive physically crosslinked networks. Colloids Surf B Biointerfaces 2017; 159:159-165. [DOI: 10.1016/j.colsurfb.2017.07.050] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 06/22/2017] [Accepted: 07/21/2017] [Indexed: 01/29/2023]
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6
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Rennert K, Nitschke M, Wallert M, Keune N, Raasch M, Lorkowski S, Mosig AS. Thermo-responsive cell culture carrier: Effects on macrophage functionality and detachment efficiency. J Tissue Eng 2017; 8:2041731417726428. [PMID: 28890781 PMCID: PMC5574476 DOI: 10.1177/2041731417726428] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2017] [Accepted: 07/25/2017] [Indexed: 12/31/2022] Open
Abstract
Harvesting cultivated macrophages for tissue engineering purposes by enzymatic digestion of cell adhesion molecules can potentially result in unintended activation, altered function, or behavior of these cells. Thermo-responsive polymer is a promising tool that allows for gentle macrophage detachment without artificial activation prior to subculture within engineered tissue constructs. We therefore characterized different species of thermo-responsive polymers for their suitability as cell substrate and to mediate gentle macrophage detachment by temperature shift. Primary human monocyte- and THP-1-derived macrophages were cultured on thermo-responsive polymers and characterized for phagocytosis and cytokine secretion in response to lipopolysaccharide stimulation. We found that both cell types differentially respond in dependence of culture and stimulation on thermo-responsive polymers. In contrast to THP-1 macrophages, primary monocyte-derived macrophages showed no signs of impaired viability, artificial activation, or altered functionality due to culture on thermo-responsive polymers compared to conventional cell culture. Our study demonstrates that along with commercially available UpCell carriers, two other thermo-responsive polymers based on poly(vinyl methyl ether) blends are attractive candidates for differentiation and gentle detachment of primary monocyte-derived macrophages. In summary, we observed similar functionality and viability of primary monocyte-derived macrophages cultured on thermo-responsive polymers compared to standard cell culture surfaces. While this first generation of custom-made thermo-responsive polymers does not yet outperform standard culture approaches, our results are very promising and provide the basis for exploiting the unique advantages offered by custom-made thermo-responsive polymers to further improve macrophage culture and recovery in the future, including the covalent binding of signaling molecules and the reduction of centrifugation and washing steps. Optimizing these and other benefits of thermo-responsive polymers could greatly improve the culture of macrophages for tissue engineering applications.
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Affiliation(s)
- Knut Rennert
- Center for Sepsis Control and Care, Jena University Hospital, Jena, Germany.,Institute of Biochemistry II, Jena University Hospital, Germany
| | - Mirko Nitschke
- Leibniz Institute of Polymer Research Dresden, Institute of Biofunctional Polymer Materials, Max Bergmann Center of Biomaterials Dresden, Dresden, Germany
| | - Maria Wallert
- Department of Nutritional Biochemistry and Physiology, Institute of Nutrition, Friedrich Schiller University Jena, Jena, Germany
| | - Natalie Keune
- Center for Sepsis Control and Care, Jena University Hospital, Jena, Germany
| | - Martin Raasch
- Center for Sepsis Control and Care, Jena University Hospital, Jena, Germany
| | - Stefan Lorkowski
- Department of Nutritional Biochemistry and Physiology, Institute of Nutrition, Friedrich Schiller University Jena, Jena, Germany.,Competence Cluster for Nutrition and Cardiovascular Health (nutriCARD), Halle-Jena-Leipzig, Germany
| | - Alexander S Mosig
- Center for Sepsis Control and Care, Jena University Hospital, Jena, Germany.,Institute of Biochemistry II, Jena University Hospital, Germany
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7
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Fan X, Zhu L, Wang K, Wang B, Wu Y, Xie W, Huang C, Chan BP, Du Y. Stiffness-Controlled Thermoresponsive Hydrogels for Cell Harvesting with Sustained Mechanical Memory. Adv Healthc Mater 2017; 6. [PMID: 28105774 DOI: 10.1002/adhm.201601152] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 11/23/2016] [Indexed: 01/17/2023]
Abstract
Most mechanobiological investigations focused on in situ mechanical regulation of cells on stiffness-controlled substrates with few downstream applications, as it is still challenging to harvest and expand mechanically primed cells by enzymatic digestion (e.g., trypsin) without interrupting cellular mechanical memory between passages. This study develops thermoresponsive hydrogels with controllable stiffness to generate mechanically primed cells with intact mechanical memory for augmented wound healing. No significant cellular property alteration of the fibroblasts primed on thermoresponsive hydrogels with varied stiffness has been observed through thermoresponsive harvesting. When reseeding the harvested cells for further evaluation, softer hydrogels are proven to better sustain the mechanical priming effects compared to rigid tissue culture plate, which indicates that both the stiffness-controlled substrate and thermoresponsive harvesting are required to sustain cellular mechanical memory between passages. Moreover, epigenetics analysis reveals that thermoresponsive harvesting could reduce the rearrangement and loss of chromatin proteins compared to that of trypsinization. In vivo wound healing using mechanically primed fibroblasts shows featured epithelium and sebaceous glands, which indicates augmented skin recovery compared with trypsinized fibroblasts. Thus, the thermoresponsive hydrogel-based cell harvesting system offers a powerful tool to investigate mechanobiology between cell passages and produces abundant cells with tailored mechanical priming properties for cell-based applications.
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Affiliation(s)
- Xingliang Fan
- Department of Biomedical Engineering; School of Medicine; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Tsinghua University; Beijing 100084 China
- Joint Center for Life Sciences; Tsinghua University-Peking University; Beijing 100084 China
| | - Lu Zhu
- Department of Biomedical Engineering; School of Medicine; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Tsinghua University; Beijing 100084 China
- Institute of Medical Equipment; Academy of Military Medical Sciences; Tianjin 300161 China
| | - Ke Wang
- Department of Chemistry; School of Science; Tsinghua University; Beijing 100084 China
| | - Bingjie Wang
- Department of Biomedical Engineering; School of Medicine; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Tsinghua University; Beijing 100084 China
- School of Life Science; Tsinghua University; Beijing 100084 China
| | - Yaozu Wu
- Department of Biomedical Engineering; School of Medicine; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Tsinghua University; Beijing 100084 China
| | - Wei Xie
- Joint Center for Life Sciences; Tsinghua University-Peking University; Beijing 100084 China
- School of Life Science; Tsinghua University; Beijing 100084 China
| | - Chengyu Huang
- Department of Plastic; Reconstructive and Aesthetic Surgery; Beijing Tsinghua Changgung Hospital; Tsinghua University; Beijing 102218 China
| | - Barbara Pui Chan
- Tissue Engineering Laboratory; Department of Mechanical Engineering; The University of Hong Kong; Pokfulam Road Hong Kong Special Administrative Region China
| | - Yanan Du
- Department of Biomedical Engineering; School of Medicine; Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases; Tsinghua University; Beijing 100084 China
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8
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Harvesting pre-polarized macrophages using thermo-responsive substrates. Sci Rep 2017; 7:42495. [PMID: 28195152 PMCID: PMC5307341 DOI: 10.1038/srep42495] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 01/11/2017] [Indexed: 11/24/2022] Open
Abstract
In the cell culture environment macrophages are highly adherent cells. Currently used methods to harvest macrophages have the disadvantage of reducing cell viability and their ability to re-attach after seeding. Although thermo-responsive surfaces have been employed to harvest cell sheets no reports are available to use these to harvest (pre-polarized) macrophages. We show that this method significantly improves the yield of living macrophages and percentage of subsequent cell reattachment, whilst having a minimal effect on the cell phenotype.
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9
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Dzhoyashvili NA, Thompson K, Gorelov AV, Rochev YA. Film Thickness Determines Cell Growth and Cell Sheet Detachment from Spin-Coated Poly(N-Isopropylacrylamide) Substrates. ACS APPLIED MATERIALS & INTERFACES 2016; 8:27564-27572. [PMID: 27661256 DOI: 10.1021/acsami.6b09711] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Poly(N-isopropylacrylamide) (pNIPAm) is widely used to fabricate thermoresponsive surfaces for cell sheet detachment. Many complex and expensive techniques have been employed to produce pNIPAm substrates for cell culture. The spin-coating technique allows rapid fabrication of pNIPAm substrates with high reproducibility and uniformity. In this study, the dynamics of cell attachment, proliferation, and function on non-cross-linked spin-coated pNIPAm films of different thicknesses were investigated. The measurements of advancing contact angle revealed increasing contact angles with increasing film thickness. Results suggest that more hydrophilic 50 and 80 nm thin pNIPAm films are more preferable for cell sheet fabrication, whereas more hydrophobic 300 and 900 nm thick spin-coated pNIPAm films impede cell attachment. These changes in cell behavior were correlated with changes in thickness and hydration of pNIPAm films. The control of pNIPAm film thickness using the spin-coating technique offers an effective tool for cell sheet-based tissue engineering.
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Affiliation(s)
| | | | - Alexander V Gorelov
- School of Chemistry and Chemical Biology, University College Dublin , D04 R7R0, Belfield, Dublin 4, Ireland
- Institute of Theoretical and Experimental Biophysics, Russian Academy of Science , 142290 Pushchino, Moscow Region, Russia
| | - Yuri A Rochev
- Sechenov First Moscow State Medical University , Institute for Regenerative Medicine, 119991 Moscow, Russia
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10
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Healy D, Nash M, Gorelov A, Thompson K, Dockery P, Belochapkine S, Madden J, Rochev Y. Nanometer-scale physically adsorbed thermoresponsive films for cell culture. INT J POLYM MATER PO 2016. [DOI: 10.1080/00914037.2016.1201765] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Deirdre Healy
- School of Chemistry, National University of Ireland Galway, Galway, Ireland
| | - Maria Nash
- School of Chemistry, National University of Ireland Galway, Galway, Ireland
| | - Alexander Gorelov
- School of Chemistry and Chemical Biology, University College Dublin, Belfield, Dublin, Ireland
| | - Kerry Thompson
- Center for Microscopy and Imaging, Anatomy, School of Medicine, National University of Ireland Galway, Galway, Ireland
| | - Peter Dockery
- Center for Microscopy and Imaging, Anatomy, School of Medicine, National University of Ireland Galway, Galway, Ireland
| | - Serguei Belochapkine
- Materials and Surface Science Institute, University of Limerick, Limerick, Ireland
| | | | - Yury Rochev
- School of Chemistry, National University of Ireland Galway, Galway, Ireland
- Sechenov First Moscow State Medical University, Institute for Regenerative Medicine, Moscow, Russia
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11
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A drug delivery hydrogel system based on activin B for Parkinson's disease. Biomaterials 2016; 102:72-86. [PMID: 27322960 DOI: 10.1016/j.biomaterials.2016.06.016] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Revised: 05/27/2016] [Accepted: 06/05/2016] [Indexed: 01/01/2023]
Abstract
Parkinson's disease (PD) is one of the most common neurodegenerative diseases. Activins are members of the superfamily of transforming growth factors and have many potential neuroprotective effects. Herein, at the first place, we verified activin B's neuroprotective role in a PD model, and revealed that activin B's fast release has limited function in the PD therapy. To this end, we developed a multi-functional crosslinker based thermosensitive injectable hydrogels to deliver activin B, and stereotactically injected the activin B-loaded hydrogel into the striatum of a mouse model of PD. The histological evaluation showed that activin B can be detected even 5 weeks post-surgery in PD mice implanted with activin B-loaded hydrogels, and activin B-loaded hydrogels can significantly increase the density of tyrosine hydroxylase positive (TH(+)) nerve fibers and reduce inflammatory responses. The behavioral evaluation demonstrated that activin B-loaded hydrogels significantly improved the performance of the mice in the PD model. Meanwhile, we found that hydrogels can slightly induce the activation of microglia cells and astrocytes, while cannot induce apoptosis in the striatum. Overall, our data demonstrated that the developed activin B-loaded hydrogels provide sustained release of activin B for over 5 weeks and contribute to substantial cellular protection and behavioral improvement, suggesting their potential as a therapeutic strategy for PD.
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12
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Fan X, Nash ME, Gorelov AV, Barry FP, Shaw G, Rochev YA. Thermoresponsive Substrates Used for the Growth and Controlled Differentiation of Human Mesenchymal Stem Cells. Macromol Rapid Commun 2015; 36:1897-1901. [DOI: 10.1002/marc.201500234] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 07/01/2015] [Indexed: 12/24/2022]
Affiliation(s)
- Xingliang Fan
- National Centre for Biomedical Engineering Science NUI; Galway H91DK59 Ireland
| | - Maria E. Nash
- Instituto de Ciencia y Tecnología de Polímeros; ICTP-CSIC Madrid 28006 Spain
| | | | - Frank P. Barry
- Regenerative Medicine Institute; NUI; Galway H91DK59 Ireland
| | - Georgina Shaw
- Regenerative Medicine Institute; NUI; Galway H91DK59 Ireland
| | - Yury A. Rochev
- National Centre for Biomedical Engineering Science NUI; Galway H91DK59 Ireland
- School of Chemistry; NUI; Galway H91DK59 Ireland
- Network of Excellence for Functional Biomaterials; NUI; Galway H91DK59 Ireland
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13
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Ma QL, Zhao LZ, Liu RR, Jin BQ, Song W, Wang Y, Zhang YS, Chen LH, Zhang YM. Improved implant osseointegration of a nanostructured titanium surface via mediation of macrophage polarization. Biomaterials 2014; 35:9853-9867. [PMID: 25201737 DOI: 10.1016/j.biomaterials.2014.08.025] [Citation(s) in RCA: 204] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2014] [Accepted: 08/14/2014] [Indexed: 12/19/2022]
Abstract
The use of endosseous implanted materials is often limited by undesirable effects that may be due to macrophage-related inflammation. The purpose of this study was to fabricate a nanostructured surface on a titanium implant to regulate the macrophage inflammatory response and improve the performance of the implant. Anodization at 5 and 20 V as well as UV irradiation were used to generate hydrophilic, nanostructured TiO2 surfaces (denoted as NT5 and NT20, respectively). Their surface characteristics and in vivo osseointegration as well as the inflammatory response they elicit were analyzed. In addition, the behavior of macrophages in vitro was evaluated. Although the in vitro osteogenic activity on the two surfaces was similar, the NT5 surface was associated with more bone formation, less inflammation, and a reduced CD68(+) macrophage distribution in vivo compared to the NT20 and polished Ti surfaces. Consistently, further experiments revealed that the NT5 surface induced healing-associated M2 polarization in vitro and in vivo. By contrast, the NT20 surface promoted the pro-inflammatory M1 polarization, which could further impair bone regeneration. The results demonstrate the dominant role of macrophage-related inflammation in bone healing around implants and that surface nanotopography can be designed to have an immune-regulating effect in support of the success of implants.
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Affiliation(s)
- Qian-Li Ma
- State Key Laboratory of Military Stomatology, Department of Prosthetic Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Ling-Zhou Zhao
- State Key Laboratory of Military Stomatology, Department of Periodontology, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Rong-Rong Liu
- Department of Immunology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Bo-Quan Jin
- Department of Immunology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Wen Song
- State Key Laboratory of Military Stomatology, Department of Prosthetic Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Ying Wang
- State Key Laboratory of Military Stomatology, Department of Periodontology, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Yu-Si Zhang
- Department of Immunology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Li-Hua Chen
- Department of Immunology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China.
| | - Yu-Mei Zhang
- State Key Laboratory of Military Stomatology, Department of Prosthetic Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China.
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