1
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One-pot synthesis of dibenzaldehyde-terminated poly(ethylene glycol) for preparation of dynamic chitosan-based amphiphilic hydrogels. Polym Bull (Berl) 2021. [DOI: 10.1007/s00289-020-03244-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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2
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Saidi M, Dabbaghi A, Rahmani S. Swelling and drug delivery kinetics of click-synthesized hydrogels based on various combinations of PEG and star-shaped PCL: influence of network parameters on swelling and release behavior. Polym Bull (Berl) 2019. [DOI: 10.1007/s00289-019-02948-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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3
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Dabbaghi A, Rahmani S. Synthesis and characterization of biodegradable multicomponent amphiphilic conetworks with tunable swelling through combination of ring-opening polymerization and “click” chemistry method as a controlled release formulation for 2,4-dichlorophenoxyacetic a. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4474] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Alaleh Dabbaghi
- Laboratory of Polymer Synthesis, Department of Chemistry, Faculty of Science; University of Zanjan; Zanjan Iran
| | - Sohrab Rahmani
- Laboratory of Polymer Synthesis, Department of Chemistry, Faculty of Science; University of Zanjan; Zanjan Iran
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4
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Nutan B, Chandel AKS, Jewrajka SK. Liquid Prepolymer-Based in Situ Formation of Degradable Poly(ethylene glycol)-Linked-Poly(caprolactone)-Linked-Poly(2-dimethylaminoethyl)methacrylate Amphiphilic Conetwork Gels Showing Polarity Driven Gelation and Bioadhesion. ACS APPLIED BIO MATERIALS 2018; 1:1606-1619. [DOI: 10.1021/acsabm.8b00461] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Bhingaradiya Nutan
- Membrane Science and Separation Technology Division, Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute G. B. Marg, Bhavnagar, Gujarat 364002, India
| | - Arvind K. Singh Chandel
- Membrane Science and Separation Technology Division, Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute G. B. Marg, Bhavnagar, Gujarat 364002, India
| | - Suresh K. Jewrajka
- Membrane Science and Separation Technology Division, Academy of Scientific and Innovative Research, CSIR-Central Salt and Marine Chemicals Research Institute G. B. Marg, Bhavnagar, Gujarat 364002, India
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5
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Star PEG-based amphiphilic polymers: synthesis, characterization and swelling behaviors. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2476-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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6
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Jesson C, Cunningham VJ, Smallridge MJ, Armes SP. Synthesis of High Molecular Weight Poly(glycerol monomethacrylate) via RAFT Emulsion Polymerization of Isopropylideneglycerol Methacrylate. Macromolecules 2018; 51:3221-3232. [PMID: 29805184 PMCID: PMC5959244 DOI: 10.1021/acs.macromol.8b00294] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 03/27/2018] [Indexed: 12/17/2022]
Abstract
High molecular weight water-soluble polymers are widely used as flocculants or thickeners. However, synthesis of such polymers via solution polymerization invariably results in highly viscous fluids, which makes subsequent processing somewhat problematic. Alternatively, such polymers can be prepared as colloidal dispersions; in principle, this is advantageous because the particulate nature of the polymer chains ensures a much lower fluid viscosity. Herein we exemplify the latter approach by reporting the convenient one-pot synthesis of high molecular weight poly(glycerol monomethacrylate) (PGMA) via the reversible addition-fragmentation chain transfer (RAFT) aqueous emulsion polymerization of a water-immiscible protected monomer precursor, isopropylideneglycerol methacrylate (IPGMA) at 70 °C, using a water-soluble poly(glycerol monomethacrylate) (PGMA) chain transfer agent as a steric stabilizer. This formulation produces a low-viscosity aqueous dispersion of PGMA-PIPGMA diblock copolymer nanoparticles at 20% solids. Subsequent acid deprotection of the hydrophobic core-forming PIPGMA block leads to particle dissolution and affords a viscous aqueous solution comprising high molecular weight PGMA homopolymer chains with a relatively narrow molecular weight distribution. Moreover, it is shown that this latex precursor route offers an important advantage compared to the RAFT aqueous solution polymerization of glycerol monomethacrylate since it provides a significantly faster rate of polymerization (and hence higher monomer conversion) under comparable conditions.
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Affiliation(s)
- Craig
P. Jesson
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K.
| | | | | | - Steven P. Armes
- Department
of Chemistry, University of Sheffield, Brook Hill, Sheffield S3 7HF, U.K.
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7
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Radzevicius P, Krivorotova T, Makuska R. Synthesis by one-pot RAFT polymerization and properties of amphiphilic pentablock copolymers with repeating blocks of poly(2-hydroxyethyl methacrylate) and poly(butyl methacrylate). Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.12.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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8
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Liu S, Dong M, Zhang Z, Fu G. High elasticity, strength, and biocompatible amphiphilic hydrogel via click chemistry and ferric ion coordination. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3997] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Shunli Liu
- School of Chemistry and Chemical Engineering; Southeast University; Jiangning District Nanjing 211189 Jiangsu Province China
| | - Mengjiao Dong
- School of Chemistry and Chemical Engineering; Southeast University; Jiangning District Nanjing 211189 Jiangsu Province China
| | - Zhihong Zhang
- Henan Provincial Key Laboratory of Surface and Interface Science; Zhengzhou University of Light Industry; No. 166, Science Avenue Zhengzhou 450001 China
| | - Guodong Fu
- School of Chemistry and Chemical Engineering; Southeast University; Jiangning District Nanjing 211189 Jiangsu Province China
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9
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10
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Chandel AKS, Bera A, Nutan B, Jewrajka SK. Reactive compatibilizer mediated precise synthesis and application of stimuli responsive polysaccharides-polycaprolactone amphiphilic co-network gels. POLYMER 2016. [DOI: 10.1016/j.polymer.2016.07.033] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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11
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Chandel AKS, Kumar CU, Jewrajka SK. Effect of Polyethylene Glycol on Properties and Drug Encapsulation-Release Performance of Biodegradable/Cytocompatible Agarose-Polyethylene Glycol-Polycaprolactone Amphiphilic Co-Network Gels. ACS APPLIED MATERIALS & INTERFACES 2016; 8:3182-92. [PMID: 26760672 DOI: 10.1021/acsami.5b10675] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We synthesized agarose-polycaprolactone (Agr-PCL) bicomponent and Agr-polyethylene glycol-PCL (Agr-PEG-PCL) tricomponent amphiphilic co-network (APCN) gels by the sequential nucleophilic substitution reaction between amine-functionalized Agr and activated halide terminated PCL or PCL-b-PEG-b-PCL copolymer for the sustained and localized delivery of hydrophilic and hydrophobic drugs. The biodegradability of the APCNs was confirmed using lipase and by hydrolytic degradation. These APCN gels displayed good cytocompatibility and blood compatibility. Importantly, these APCN gels exhibited remarkably high drug loading capacity coupled with sustained and triggered release of both hydrophilic and hydrophobic drugs. PEG in the APCNs lowered the degree of phase separation and enhanced the mechanical property of the APCN gels. The drug loading capacity and the release kinetics were also strongly influenced by the presence of PEG, the nature of release medium, and the nature of the drug. Particularly, PEG in the APCN gels significantly enhanced the 5-fluorouracil loading capacity and lowered its release rate and burst release. Release kinetics of highly water-soluble gemcitabine hydrochloride and hydrophobic prednisolone acetate depended on the extent of water swelling of the APCN gels. Cytocompatibility/blood compatibility and pH and enzyme-triggered degradation together with sustained release of drugs show great promise for the use of these APCN gels in localized drug delivery and tissue engineering applications.
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Affiliation(s)
- Arvind K Singh Chandel
- Reverse Osmosis Membrane Division, CSIR and ‡Academy of Scientific and Innovative Research-AcSIR, Central Salt and Marine Chemicals Research Institute , Gijubhai Badheka Marg, Bhavnagar, Gujarat 364002, India
| | - Chinta Uday Kumar
- Reverse Osmosis Membrane Division, CSIR and ‡Academy of Scientific and Innovative Research-AcSIR, Central Salt and Marine Chemicals Research Institute , Gijubhai Badheka Marg, Bhavnagar, Gujarat 364002, India
| | - Suresh K Jewrajka
- Reverse Osmosis Membrane Division, CSIR and ‡Academy of Scientific and Innovative Research-AcSIR, Central Salt and Marine Chemicals Research Institute , Gijubhai Badheka Marg, Bhavnagar, Gujarat 364002, India
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12
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Plenderleith RA, Pateman CJ, Rodenburg C, Haycock JW, Claeyssens F, Sammon C, Rimmer S. Arginine-glycine-aspartic acid functional branched semi-interpenetrating hydrogels. SOFT MATTER 2015; 11:7567-7578. [PMID: 26280624 DOI: 10.1039/c5sm00695c] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
For the first time a series of functional hydrogels based on semi-interpenetrating networks with both branched and crosslinked polymer components have been prepared and we show the successful use of these materials as substrates for cell culture. The materials consist of highly branched poly(N-isopropyl acrylamide)s with peptide functionalised end groups in a continuous phase of crosslinked poly(vinyl pyrrolidone). Functionalisation of the end groups of the branched polymer component with the GRGDS peptide produces a hydrogel that supports cell adhesion and proliferation. The materials provide a new synthetic functional biomaterial that has many of the features of extracellular matrix, and as such can be used to support tissue regeneration and cell culture. This class of high water content hydrogel material has important advantages over other functional hydrogels in its synthesis and does not require post-processing modifications nor are functional-monomers, which change the polymerisation process, required. Thus, the systems are amenable to large scale and bespoke manufacturing using conventional moulding or additive manufacturing techniques. Processing using additive manufacturing is exemplified by producing tubes using microstereolithography.
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Affiliation(s)
- Richard A Plenderleith
- The Polymer and Biomaterials Chemistry Laboratories, Department of Chemistry, University of Sheffield, Sheffield, South Yorkshire S3 7HF, UK.
| | - Christopher J Pateman
- Department of Materials and Engineering, Kroto Research Institute, University of Sheffield, North Campus, Broad Lane, Sheffield S3 7HQ, UK
| | - Cornelia Rodenburg
- Department of Materials Science and Engineering, University of Sheffield, Mappin Street, Sheffield, S1 3JD, UK
| | - John W Haycock
- Department of Materials and Engineering, Kroto Research Institute, University of Sheffield, North Campus, Broad Lane, Sheffield S3 7HQ, UK
| | - Frederik Claeyssens
- Department of Materials and Engineering, Kroto Research Institute, University of Sheffield, North Campus, Broad Lane, Sheffield S3 7HQ, UK
| | - Chris Sammon
- Materials and Engineering Research Institute, Sheffield Hallam University, Howard Street, Sheffield, South Yorkshire, S1 1WN, UK
| | - Stephen Rimmer
- The Polymer and Biomaterials Chemistry Laboratories, Department of Chemistry, University of Sheffield, Sheffield, South Yorkshire S3 7HF, UK.
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13
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Yildirimer L, Seifalian A. Tissue engineering. Plast Reconstr Surg 2015. [DOI: 10.1002/9781118655412.ch7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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14
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Poly(methacrylic acid)-l
-Polyisobutylene Amphiphilic Conetworks by Using an Ethoxyethyl-Protected Comonomer: Synthesis, Protecting Group Removal in the Cross-Linked State, and Characterization. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201400478] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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15
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Shi Y, Schmalz H, Agarwal S. Designed enzymatically degradable amphiphilic conetworks by radical ring-opening polymerization. Polym Chem 2015. [DOI: 10.1039/c5py00962f] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple and versatile route for making functional biodegradable amphiphilic conetworks (APCNs) with unique swelling property and excellent enzymatic degradability is presented. The APCNs were made by radical ring-opening copolymerization of cyclic ketene acetal and vinyl cyclopropane derivative.
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Affiliation(s)
- Yinfeng Shi
- Macromolecular Chemistry II and Bayreuth Center for Colloids and Interfaces
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Holger Schmalz
- Macromolecular Chemistry II and Bayreuth Center for Colloids and Interfaces
- University of Bayreuth
- 95440 Bayreuth
- Germany
| | - Seema Agarwal
- Macromolecular Chemistry II and Bayreuth Center for Colloids and Interfaces
- University of Bayreuth
- 95440 Bayreuth
- Germany
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16
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Bera A, Singh Chandel AK, Uday Kumar C, Jewrajka SK. Degradable/cytocompatible and pH responsive amphiphilic conetwork gels based on agarose-graft copolymers and polycaprolactone. J Mater Chem B 2015; 3:8548-8557. [DOI: 10.1039/c5tb01251a] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Amphiphilic conetwork gels based on graft copolymers of agarose and polycaprolactone exhibited desirable cytocompatibility/blood compatibility and pH responsive release of hydrophilic and hydrophobic drugs, and may be suitable for biomedical applications.
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Affiliation(s)
- Anupam Bera
- Reverse Osmosis Membrane Division
- Bhavnagar
- India
- AcSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar
| | - Arvind K. Singh Chandel
- Reverse Osmosis Membrane Division
- Bhavnagar
- India
- AcSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar
| | | | - Suresh K. Jewrajka
- Reverse Osmosis Membrane Division
- Bhavnagar
- India
- AcSIR-Central Salt and Marine Chemicals Research Institute
- Bhavnagar
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17
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Zhou C, Deng L, Yao F, Xu L, Zhou J, Fu GD. A Well-Defined Amphiphilic Polymer Conetwork from Sequence Control of the Cross-Linking in Polymer Chains. Ind Eng Chem Res 2014. [DOI: 10.1021/ie503649t] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Chao Zhou
- School
of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu Province 211189, P. R. China
| | - Linhong Deng
- Institute
of Biomedical Engineering and Health Sciences, Changzhou University, Changzhou, Jiangsu Province 213164, P. R. China
| | - Fang Yao
- School
of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu Province 211189, P. R. China
| | - Liqun Xu
- Institute of Clean Energy & Advanced Materials, Southwest University, Chongqing, 400715, P. R. China
| | - Jian Zhou
- School
of Materials and Engineering, Jiangsu University of Technology, Changzhou, Jiangsu Province 213001, P. R. China
| | - Guo Dong Fu
- School
of Chemistry and Chemical Engineering, Southeast University, Nanjing, Jiangsu Province 211189, P. R. China
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18
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Hassan E, Deshpande P, Claeyssens F, Rimmer S, MacNeil S. Amine functional hydrogels as selective substrates for corneal epithelialization. Acta Biomater 2014; 10:3029-37. [PMID: 24607855 DOI: 10.1016/j.actbio.2014.02.043] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Revised: 02/03/2014] [Accepted: 02/24/2014] [Indexed: 10/25/2022]
Abstract
The aim of this study was to develop a synthetic hydrogel to act as a corneal substitute capable of selectively supporting the adhesion and proliferation of limbal epithelial cells (LECs) while inhibiting growth of limbal fibroblasts. Deficiency of LECs causes conjunctival epithelial cells to move over the cornea, producing a thick scar pannus. Unilateral defects can be treated using LEC cultured from the unaffected eye, transplanting them to the affected cornea after scar tissue is removed. The underlying wound bed is often damaged, however, hence the need to develop a corneal inlay to aid in corneal re-epithelialization. Transparent epoxy-functional polymethacrylate networks were synthesized using a combination of glycerol monomethacrylate, ethylene glycol dimethacrylate, lauryl methacrylate and glycidyl methacrylate that produced two different bulk hydrogel compositions with different equilibrium water contents (EWCs): Base 1 and Base 2, EWC=55% and 35%, respectively. Two sets of amine-functional hydrogels were produced following reaction of the epoxide groups with excesses of either ammonia, 1,2-diamino ethane, 1,3-diamino propane, 1,4-diamino butane or 1,6-diamino hexane. Neither series of hydrogels supported the proliferation of limbal fibroblasts irrespective of amine functionalization but they both supported the adhesion and proliferation of limbal epithelial cells, particularly when functionalized with 1,4-diamino butane. With Base 1 hydrogels (less so with Base 2) a vigorous epithelial outgrowth was seen from small limbal explants and a confluent epithelial layer was achieved in vitro within 6days. The data support the development of hydrogels specific for epithelial formation.
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19
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Zhou C, Qian S, Zhang A, Xu L, Zhu J, Cheng Z, Kang ET, Yao F, Fu GD. A well-defined amphiphilic polymer co-network from precise control of the end-functional groups of linear RAFT polymers. RSC Adv 2014. [DOI: 10.1039/c3ra47939k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
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20
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Fan X, Wang M, Yuan D, He C. Amphiphilic conetworks and gels physically cross-linked via stereocomplexation of polylactide. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:14307-14313. [PMID: 24144302 DOI: 10.1021/la403432y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Amphiphilic conetworks (APCNs), consisting of hydrophilic poly[poly(ethylene glycol) methyl ester acrylate] (PPEGMEA) and hydrophobic stereocomplex of poly(L-lactide) (PLLA) and poly(D-lactide) (PDLA), were prepared by free radical copolymerization of PEGMEA with acrylate macromonomer of the PLA stereocomplex. The effects of stereocomplexation and the amount of PLA stereocomplex on the rheology properties of APCNs were investigated. The results indicated that the APCNs was stronger in the presence of stereocomplexation compared with the that of nonstereocomplex system, and the strength of the APCNs increased with the increasing of the amount of PLA stereocomplex. The storage modulus of the APCNs could be easily tuned from 1200 to 4300 Pa by incorporating 2-10% of stereocomplex PLA. On the other hand, the swelling behavior of APCNs decreased with the increasing content of hydrophobic PLA cross-linker.
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Affiliation(s)
- Xiaoshan Fan
- Department of Materials Science and Engineering, National University of Singapore , 9 Engineering Drive 1, 117576 Singapore
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21
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Kali G, Vavra S, László K, Iván B. Thermally Responsive Amphiphilic Conetworks and Gels Based on Poly(N-isopropylacrylamide) and Polyisobutylene. Macromolecules 2013. [DOI: 10.1021/ma400535r] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Gergely Kali
- Department of Polymer Chemistry, Institute of Materials and Environmental
Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 17, Hungary
| | - Szilvia Vavra
- Department of Physical Chemistry
and Material Science, Budapest University of Technology and Economics, H-1521 Budapest, Hungary
| | - Krisztina László
- Department of Physical Chemistry
and Material Science, Budapest University of Technology and Economics, H-1521 Budapest, Hungary
| | - Béla Iván
- Department of Polymer Chemistry, Institute of Materials and Environmental
Chemistry, Research Centre for Natural Sciences, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 17, Hungary
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22
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Fodor C, Domján A, Iván B. Unprecedented scissor effect of macromolecular cross-linkers on the glass transition temperature of poly(N-vinylimidazole), crystallinity suppression of poly(tetrahydrofuran) and molecular mobility by solid state NMR in poly(N-vinylimidazole)-l-poly(tetrahydrofuran) conetworks. Polym Chem 2013. [DOI: 10.1039/c3py00299c] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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23
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Domján A, Mezey P, Varga J. Behavior of the Interphase Region of an Amphiphilic Polymer Conetwork Swollen in Polar and Nonpolar Solvent. Macromolecules 2012. [DOI: 10.1021/ma202388f] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Attila Domján
- Institute
of Structural Chemistry, ‡Institute of Materials and Environmental Chemistry, §Institute of Biomolecular
Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H-1025 Budapest, Pusztaszeri ut
59-67, Hungary
| | - Péter Mezey
- Institute
of Structural Chemistry, ‡Institute of Materials and Environmental Chemistry, §Institute of Biomolecular
Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H-1025 Budapest, Pusztaszeri ut
59-67, Hungary
| | - Jenő Varga
- Institute
of Structural Chemistry, ‡Institute of Materials and Environmental Chemistry, §Institute of Biomolecular
Chemistry, Chemical Research Center, Hungarian Academy of Sciences, H-1025 Budapest, Pusztaszeri ut
59-67, Hungary
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24
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Fodor C, Iván B. Poly(
N
‐vinylimidazole)‐
l
‐poly(tetrahydrofuran) amphiphilic conetworks and gels. II. Unexpected dependence of the reactivity of poly(tetrahydrofuran) macromonomer cross‐linker on molecular weight in copolymerization with
N
‐vinylimidazole. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/pola.24972] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Csaba Fodor
- Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, Pusztaszeri út 59‐67, P. O. Box 17, Budapest H‐1525, Hungary
| | - Béla Iván
- Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, Pusztaszeri út 59‐67, P. O. Box 17, Budapest H‐1525, Hungary
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25
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Poole J, MacNeil S, Rimmer S. Semicontinuous Emulsion Polymerization of Butyl Methacrylate and 1, 3-Butadiene in the Presence of Cyclodextrins and Cytocompatibility of Dicarboxylic Acid Telechelic Oligo(butyl Methacrylate)s Derived from Ozonolysis of the Latexes. MACROMOL CHEM PHYS 2011. [DOI: 10.1002/macp.201100212] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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26
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Fodor C, Kali G, Iván B. Poly(N-vinylimidazole)-l-Poly(tetrahydrofuran) Amphiphilic Conetworks and Gels: Synthesis, Characterization, Thermal and Swelling Behavior. Macromolecules 2011. [DOI: 10.1021/ma200700m] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Csaba Fodor
- Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, Pusztaszeri u. 59-67, P.O. Box 17, H-1525 Budapest, Hungary
| | - Gergely Kali
- Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, Pusztaszeri u. 59-67, P.O. Box 17, H-1525 Budapest, Hungary
| | - Béla Iván
- Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, Pusztaszeri u. 59-67, P.O. Box 17, H-1525 Budapest, Hungary
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27
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Derkaoui SM, Labbé A, Purnama A, Gueguen V, Barbaud C, Avramoglou T, Letourneur D. Films of dextran-graft-polybutylmethacrylate to enhance endothelialization of materials. Acta Biomater 2010; 6:3506-13. [PMID: 20371388 DOI: 10.1016/j.actbio.2010.03.043] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2009] [Revised: 03/14/2010] [Accepted: 03/31/2010] [Indexed: 10/19/2022]
Abstract
We have synthesized new structures obtained from amphiphilic copolymers of dextran and polybutylmethacrylate with the aim of endothelialization of biomaterials. Grafting of butylmethacrylate onto dextran has been carried out using ceric ammonium nitrate as initiator. Three copolymers were obtained (11, 30 and 37 wt.% dextran) and homogeneous thin films were successfully prepared. In contrast to dextran, the resulting films were stable in water, and copolymers characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry and dynamic mechanical analysis showed evidence of hybrid properties between the parent homopolymers. Surfaces of films were smooth when analyzed by atomic force microscopy (roughness 2+/-1 nm) but greatly differed in their hydrophilicity by increasing the dextran content (water contact angle from 99 degrees to 57 degrees). In contrast to polybutylmethacrylate, where the proliferation of vascular smooth muscle cells (VSMCs) was excellent but that of endothelial cells was very low, the copolymer containing 11% of dextran was excellent for endothelial cells but very limited for VSMCs. An in vitro wound assay demonstrated that copolymer with 11% dextran is even more favorable for endothelial cell migration than tissue-culture polystyrene. Increasing the dextran content in the copolymers decreased the proliferation for both vascular cell types. Altogether, these results show that transparent and water-insoluble films made from copolymers of dextran and butylmethacrylate copolymers with an appropriate composition could enhance endothelial cell proliferation and migration. Therefore, a potential benefit of this approach is the availability of surfaces with tunable properties for the endothelialization of materials.
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Johnson C, Perlin L, Wyman P, Zhao B, Fullwood NJ, MacNeil S, Rimmer S. Cell Adhesion to Polymethacrylate Networks Prepared by Photopolymerization and Functionalized with GRGDS Peptide or Fibrinogen. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/masy.201050537] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Lin C, Gitsov I. Synthesis and Physical Properties of Reactive Amphiphilic Hydrogels Based on Poly(p-chloromethylstyrene) and Poly(ethylene glycol): Effects of Composition and Molecular Architecture. Macromolecules 2010. [DOI: 10.1021/ma9026564] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Ivan Gitsov
- Department of Chemistry
- The Michael M. Szwarc Polymer Research Institute
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30
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Mohan N, Nair PD, Tabata Y. A 3D biodegradable protein based matrix for cartilage tissue engineering and stem cell differentiation to cartilage. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20 Suppl 1:S49-60. [PMID: 18560767 DOI: 10.1007/s10856-008-3481-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2007] [Accepted: 05/19/2008] [Indexed: 05/20/2023]
Abstract
A protein based 3D porous scaffold is fabricated by blending gelatin and albumin. The biomimetic biodegradable gelatin, promoted good cell adhesion and its hydrophilic nature enabled absorption of culture media. Albumin is proposed to serve as a nontoxic foaming agent and also helped to attain a hydrophobic-hydrophilic balance. The hydrophobic-hydrophilic balance and appropriate crosslinking of the scaffold avoided extensive swelling, as well as retained the stability of scaffold in culture medium for long period. The scaffold is found to be highly porous with open interconnected pores. The adequate swelling and mechanical property of the scaffold helped to withstand the loads imparted by the cells during in vitro culture. The scaffold served as a nontoxic material to monolayer of fibroblast cells and is found to be cell compatible. The suitability of scaffold for chondrocyte culture and stem cell differentiation to chondrocytes is further explored in this work. The scaffold provided appropriate environment for chondrocyte culture, resulting in deposition of cartilage specific matrix molecules that completely masked the pores of the porous scaffold. The scaffold promoted the proliferation and differentiation of mesenchymal stem cells to chondrocytes in presence of growth factors. The transforming growth factor, TGFbeta3 promoted better chondrogenic differentiation than its isoform TGFbeta1 in this scaffold.
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Affiliation(s)
- Neethu Mohan
- Laboratory for Polymer Analysis, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala, India.
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Yamamoto K, Ito E, Fukaya S, Takagi H. Phase-Separated Conetwork Structure Induced by Radical Copolymerization of Poly(dimethylsiloxane)-α,ω-diacrylate and N,N-Dimethylacrylamide. Macromolecules 2009. [DOI: 10.1021/ma9009774] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Katsuhiro Yamamoto
- Departement of Materials Science & Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Eri Ito
- Material Development Section Central R&D, Menicon Co., Ltd. 1-10 Kouzouji 5-chome, Kasugai 487-0032, Japan
| | - Shuhei Fukaya
- Departement of Materials Science & Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
| | - Hideaki Takagi
- Departement of Materials Science & Engineering, Graduate School of Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
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Mespouille L, Coulembier O, Paneva D, Degée P, Rashkov I, Dubois P. Synthesis of adaptative and amphiphilic polymer model conetworks by versatile combination of ATRP, ROP, and “Click chemistry”. ACTA ACUST UNITED AC 2008. [DOI: 10.1002/pola.22827] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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33
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Vamvakaki M, Patrickios CS. Synthesis and characterization of the swelling and mechanical properties of amphiphilic ionizable model co-networks containing hydrophobic blocks. SOFT MATTER 2008; 4:268-276. [PMID: 32907240 DOI: 10.1039/b710926a] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Amphiphilic ionizable model co-networks based on near-monodisperse, linear ABA and BAB triblock and statistical copolymers of 2-(dimethylamino)ethyl methacrylate (DMAEMA, hydrophilic ionizable) and n-butyl methacrylate (BuMA, hydrophobic non-ionic) were synthesized using group-transfer polymerization in tetrahydrofuran (THF) with the use of the hydrophobic ethylene glycol dimethacrylate (EGDMA) as cross-linker. Seven model co-networks were prepared in which the architecture and copolymer composition were varied systematically. One randomly cross-linked copolymer co-network was also prepared. The co-networks were characterized in terms of their degree of swelling in water as a function of pH and in THF. An increase in the aqueous degree of swelling was observed below pH 6 because of the ionization of the DMAEMA residues. The aqueous degrees of swelling at low pH decreased with the co-network composition in hydrophobic BuMA units. The maximum aqueous degrees of swelling of the copolymer co-networks were architecture-dependent, with the co-networks comprising the statistical copolymer chains swelling about 4 times more than their triblock copolymer counterparts. This was attributed to microphase separation in the triblock copolymer co-networks, which reduced the effective chain length between cross-links due to the collapse of the hydrophobic blocks. The mechanical properties of the water-swollen co-networks at pH 3 and 9 were investigated by determining the co-network uniaxial compression modulus. This modulus was higher at pH 9 than 3, and increased linearly with the BuMA content.
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Affiliation(s)
- Maria Vamvakaki
- Department of Materials Science and Technology, University of Crete, P.O. Box 2208, 710 03 Heraklion Crete, Greece. and Institute of Electronic Structure and Laser Foundation for Research and Technology - Hellas, P.O. Box 1527, 711 10 Heraklion Crete, Greece
| | - Costas S Patrickios
- Department of Chemistry, University of Cyprus, P. O. Box 20537, 1678 Nicosia, Cyprus.
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Kali G, Georgiou TK, Iván B, Patrickios CS, Loizou E, Thomann Y, Tiller JC. Synthesis and characterization of anionic amphiphilic model conetworks of 2-butyl-1-octyl-methacrylate and methacrylic acid: effects of polymer composition and architecture. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2007; 23:10746-55. [PMID: 17824623 DOI: 10.1021/la7012478] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Seven amphiphilic conetworks of methacrylic acid (MAA) and a new hydrophobic monomer, 2-butyl-1-octyl-methacrylate (BOMA), were synthesized using group transfer polymerization. The MAA units were introduced via the polymerization of tetrahydropyranyl methacrylate (THPMA) followed by the removal of the protecting tetrahydropyranyl group by acid hydrolysis after network formation. Both THPMA and BOMA were in-house synthesized. Ethylene glycol dimethacrylate (EGDMA) was used as the cross-linker. Six of the conetworks were model conetworks, containing copolymer chains between cross-links of precise molecular weight and composition. The prepared conetwork series covered a wide range of compositions and architectures. In particular, the MAA content was varied from 67 to 94 mol %, and three different conetwork architectures were constructed: ABA triblock copolymer-based, statistical copolymer-based, and randomly cross-linked. The linear conetwork precursors were analyzed by gel permeation chromatography and 1H NMR spectroscopy in terms of their molecular weight and composition, both of which were found to be close to the theoretically calculated values. The degrees of swelling (DS) of all the amphiphilic conetworks were measured in water and in THF over the whole range of ionization of the MAA units. The DSs in water increased with the degree of ionization (DI) and the content of the hydrophilic MAA units in the conetwork, while the DSs in THF increased with the degree of polymerization of the chains between the cross-links and by reducing the DI of the MAA units. Finally, the nanophase behavior of the conetworks was probed using small-angle neutron scattering and atomic force microscopy.
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Affiliation(s)
- Gergely Kali
- Department of Chemistry, University of Cyprus, P. O. Box 20537, 1678 Nicosia, Cyprus
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35
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Rimmer S, Johnson C, Zhao B, Collier J, Gilmore L, Sabnis S, Wyman P, Sammon C, Fullwood NJ, MacNeil S. Epithelialization of hydrogels achieved by amine functionalization and co-culture with stromal cells. Biomaterials 2007; 28:5319-31. [PMID: 17888510 DOI: 10.1016/j.biomaterials.2007.08.028] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2007] [Accepted: 08/11/2007] [Indexed: 11/28/2022]
Abstract
The aim of this study was to develop a hydrogel which would be suitable for corneal cell re-epithelialization when used as a corneal implant. To achieve this, a series of hydrogels were functionalized with primary amines by post-polymerization reactions between amine compounds and glycidyl ether groups attached to the hydrogels. We report a strong correlation between the structure of the amine and the viability of stromal cells and epithelial cells cultured on these hydrogels. Subsequent co-culture of epithelial and stromal cells on the amine modified hydrogels allowed successful expansion of epithelial cells on surfaces functionalized with alkyl alpha-omega diamines with carbon chain lengths of between 3 and 6. Analysis of variance showed that corneal epithelial cells had a strong preference for surfaces functionalized by the reaction of excess 1,3 diaminopropane with units of glycidyl methacrylate compared to the reaction products of other amines (ammonia; 1,2-diaminoethane; 1,4-diaminobutane or 1,6-diaminohexane). We suggest this approach of amine functionalization combined with stromal/epithelial co-culture offers a promising new approach to achieving a secure corneal epithelium.
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Affiliation(s)
- Stephen Rimmer
- Polymer and Biomaterials Chemistry Laboratories, Chemistry Department, University of Sheffield, Sheffield, South Yorkshire S3 7HF, UK.
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36
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Sun Y, Maughan J, Haigh R, Hopkins SA, Wyman P, Johnson C, Fullwood NJ, Ebdon J, MacNeil S, Rimmer S. Polymethacrylate Networks as Substrates for Cell Culture. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/masy.200751016] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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37
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Georgiou TK, Patrickios CS, Groh PW, Iván B. Amphiphilic Model Conetworks of Polyisobutylene Methacrylate and 2-(Dimethylamino)ethyl Methacrylate Prepared by the Combination of Quasiliving Carbocationic and Group Transfer Polymerizations. Macromolecules 2007. [DOI: 10.1021/ma062307+] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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38
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Kali G, Georgiou TK, Iván B, Patrickios CS, Loizou E, Thomann Y, Tiller JC. Synthesis and Characterization of Anionic Amphiphilic Model Conetworks Based on Methacrylic Acid and Methyl Methacrylate: Effects of Composition and Architecture. Macromolecules 2007. [DOI: 10.1021/ma062400y] [Citation(s) in RCA: 79] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Gergely Kali
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P. O. Box 17, H-1525 Budapest, Pusztaszeri út 59-67, Hungary; Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803; Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and
| | - Theoni K. Georgiou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P. O. Box 17, H-1525 Budapest, Pusztaszeri út 59-67, Hungary; Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803; Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and
| | - Béla Iván
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P. O. Box 17, H-1525 Budapest, Pusztaszeri út 59-67, Hungary; Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803; Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and
| | - Costas S. Patrickios
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P. O. Box 17, H-1525 Budapest, Pusztaszeri út 59-67, Hungary; Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803; Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and
| | - Elena Loizou
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P. O. Box 17, H-1525 Budapest, Pusztaszeri út 59-67, Hungary; Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803; Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and
| | - Yi Thomann
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P. O. Box 17, H-1525 Budapest, Pusztaszeri út 59-67, Hungary; Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803; Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and
| | - Joerg C. Tiller
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus; Department of Polymer Chemistry and Material Science, Institute of Materials and Environmental Chemistry, Chemical Research Center, Hungarian Academy of Sciences, P. O. Box 17, H-1525 Budapest, Pusztaszeri út 59-67, Hungary; Department of Chemistry, Louisiana State University, Baton Rouge, Louisiana 70803; Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899; and
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Sun Y, Collett J, Fullwood NJ, Mac Neil S, Rimmer S. Culture of dermal fibroblasts and protein adsorption on block conetworks of poly(butyl methacrylate-block-(2,3 propandiol-1-methacrylate-stat-ethandiol dimethacrylate)). Biomaterials 2007; 28:661-70. [PMID: 17049980 DOI: 10.1016/j.biomaterials.2006.09.024] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2006] [Accepted: 09/20/2006] [Indexed: 11/22/2022]
Abstract
Amphiphilic block terpolymer conetworks composed of butyl methacrylate (BMA), 2,3 propandiol-1-methacrylate (GMMA) and ethandiol dimethacrylate (EDMA) were synthesized. Telechelic oligomers with the carboxylic acid end groups were made via ozonolysis of poly(BMA-co-butadiene) and then these were reacted with glycidyl methacrylate to obtain cross-linkable vinyl groups at both chain ends. Networks were then formed via free radical copolymerization with EDMA and GMMA or 2-methyl-acrylic acid 2,2-dimethyl-[1,3]dioxolan-4-ylmethyl ester (GMAc). The acetonide groups of the GMAc units were then removed, by reaction with selenium dioxide and hydrogen peroxide, to give networks with the same molecular structure as the GMMA terpolymers but different cell adhesion and protein adsorption properties. Protein adsorption was maximised in networks prepared with GMMA rather than with GMAc followed by removal of the acetonide. Block conetworks that were synthesised with GMAc were poor substrates for cell proliferation whilst the GMMA class support good levels of both cell viability and proliferation. It is suggested that the difference in behaviour is derived from changes in the surface composition.
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Affiliation(s)
- Yun Sun
- Chemistry Department, University of Sheffield, Sheffield, South Yorkshire S3 7HF, UK
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40
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Achilleos DS, Georgiou TK, Patrickios CS. Amphiphilic Model Conetworks Based on Cross-Linked Star Copolymers of Benzyl Methacrylate and 2-(Dimethylamino)ethyl Methacrylate: Synthesis, Characterization, and DNA Adsorption Studies. Biomacromolecules 2006; 7:3396-405. [PMID: 17154468 DOI: 10.1021/bm060699m] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Six amphiphilic model conetworks of a new structure, that of cross-linked "in-out" star copolymers, were synthesized by the group transfer polymerization (GTP) of the hydrophobic monomer benzyl methacrylate (BzMA) and the ionizable hydrophilic monomer 2-(dimethylamino)ethyl methacrylate (DMAEMA) in a one-pot preparation. The synthesis took place in tetrahydrofuran (THF) using tetrabutylammonium bibenzoate (TBABB) as the catalyst, 1-methoxy-1-(trimethylsiloxy)-2-methyl-propene (MTS) as the initiator, and ethylene glycol dimethacrylate (EGDMA) as the cross-linker. Three heteroarm star-, two star block-, one statistical copolymer star-, and one homopolymer star-based networks were prepared. The synthesis of these star-based networks involved four to six steps, including the preparation of the linear (co)polymers, the "arm-first" and the "in-out" star copolymers, and finally the network. The precursors and the extractables were characterized using gel permeation chromatography (GPC) and proton nuclear magnetic resonance (1H NMR) spectroscopy. The degrees of swelling (DSs) of all the networks were measured in THF, while the aqueous DSs were measured as a function of pH. The DSs at low pH were higher than those at neutral or high pH because of the protonation of the DMAEMA units and were found to be dependent on the structure of the network. The DSs in THF were higher than those in neutral water and were independent of the structure. Finally, DNA adsorption studies onto the networks indicated that the DNA binding was governed by electrostatics.
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Affiliation(s)
- Demetra S Achilleos
- Department of Chemistry, University of Cyprus, P. O. Box 20537, 1678 Nicosia, Cyprus
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41
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Thompson MT, Berg MC, Tobias IS, Lichter JA, Rubner MF, Van Vliet KJ. Biochemical Functionalization of Polymeric Cell Substrata Can Alter Mechanical Compliance. Biomacromolecules 2006; 7:1990-5. [PMID: 16768424 DOI: 10.1021/bm060146b] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Biochemical functionalization of surfaces is an increasingly utilized mechanism to promote or inhibit adhesion of cells. To promote mammalian cell adhesion, one common functionalization approach is surface conjugation of adhesion peptide sequences such as Arg-Gly-Asp (RGD), a ligand of transmembrane integrin molecules. It is generally assumed that such functionalization does not alter the local mechanical properties of the functionalized surface, as is important to interpretations of macromolecular mechanotransduction in cells. Here, we examine this assumption systematically, through nanomechanical measurement of the nominal elastic modulus of polymer multilayer films of nanoscale thickness, functionalized with RGD through different processing routes. We find that the method of biochemical functionalization can significantly alter mechanical compliance of polymeric substrata such as weak polyelectrolyte multilayers (PEMs), increasingly utilized materials for such studies. In particular, immersed adsorption of intermediate functionalization reagents significantly decreases compliance of the PEMs considered herein, whereas polymer-on-polymer stamping of these same reagents does not alter compliance of weak PEMs. This finding points to the potential unintended alteration of mechanical properties via surface functionalization and also suggests functionalization methods by which chemical and mechanical properties of cell substrata can be controlled independently.
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Affiliation(s)
- M Todd Thompson
- Department of Materials Science and Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, USA
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42
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Krasia TC, Patrickios CS. Amphiphilic Polymethacrylate Model Co-Networks: Synthesis by RAFT Radical Polymerization and Characterization of the Swelling Behavior. Macromolecules 2006. [DOI: 10.1021/ma051747i] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Theodora C. Krasia
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
| | - Costas S. Patrickios
- Department of Chemistry, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus
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43
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Liu YY, Fan XD, Wei BR, Si QF, Chen WX, Sun L. pH-responsive amphiphilic hydrogel networks with IPN structure: A strategy for controlled drug release. Int J Pharm 2006; 308:205-9. [PMID: 16321489 DOI: 10.1016/j.ijpharm.2005.10.013] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2005] [Revised: 09/27/2005] [Accepted: 10/15/2005] [Indexed: 11/26/2022]
Abstract
A pH-responsive amphiphilic hydrogel with interpenetrating polymer networks (IPN) structure for controlled drug release was proposed. The IPN was constructed with hydrophilic poly(acrylic acid) (PAA) and hydrophobic poly(butyl acrylate) (PBA). Using drug N-acetyl-5-methoxytryptamine (melatonin, MEL) as a model molecule, the controlled drug release behaviors of the IPN were investigated. It is found that not only the release of MEL from the IPN can respond to change in pH, but also the presence of hydrophobic network can overcome disadvantageous burst effect of hydrophilic network. This may be a result of hydrophobic aggregation encapsulating MEL molecules.
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Affiliation(s)
- Yu-Yang Liu
- Department of Applied Chemistry, School of Science, Northwestern Polytechnic University, Xi'an 710072, PR China.
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46
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Sun Y, Rimmer S. Preparation of Multiphase Polymer Beads Composed of Block Copolymer Amphiphilic Networks. Ind Eng Chem Res 2005. [DOI: 10.1021/ie050144s] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yun Sun
- The Polymer and Biomaterials Chemistry Laboratories, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
| | - Stephen Rimmer
- The Polymer and Biomaterials Chemistry Laboratories, Department of Chemistry, University of Sheffield, Sheffield S3 7HF, United Kingdom
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Abstract
Core-shell molecularly imprinted particles (CS-MIPs) have been synthesised using the technique of emulsion polymerisation with caffeine and theophylline being used in the surface template polymerisation with ethylene glycol dimethacrylate and oleylphenyl hydrogen phosphate. A radiolabelling study with caffeine-8-14C showed that the template was completely located at the particle surface during polymerisation. Caffeine could be specifically bound to a caffeine-imprinted CS-MIP to give a biphasic Scatchard binding curve, whereas the binding profile to a theophylline-imprinted CS-MIP was monophasic. The nanoparticles have the potential to be used in the molecular recognition of small molecules in a complex biological matrix. Water soluble highly-branched imidazole end-chain functionalised polymers of nanodimensions have also been synthesised via reversible addition-fragmentation chain transfer polymerisation. The polymers have lower critical solution temperatures which occur at sub-ambient temperatures and have proven useful in the affinity precipitation of proteins which are particularly temperature sensitive, e.g. the histidine-tagged protein fragment BRCA1. An overview of both of these areas of research is described outlining the diversity of these aqueous compatible polymers in molecular recognition processes at the nanoscale.
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Affiliation(s)
- S R Carter
- Department of Chemistry (Polymer Centre), University of Sheffield, Sheffield, South Yorkshire, S3 7HF, UK.
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48
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Pastoriza A, Pacios IE, Piérola IF. Kinetics of solvent responsiveness in poly(N,N-dimethylacrylamide) hydrogels of different morphology. POLYM INT 2005. [DOI: 10.1002/pi.1832] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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