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Li K, Lv L, Shao D, Xie Y, Cao Y, Zheng X. Engineering Nanopatterned Structures to Orchestrate Macrophage Phenotype by Cell Shape. J Funct Biomater 2022; 13:jfb13010031. [PMID: 35323231 PMCID: PMC8949710 DOI: 10.3390/jfb13010031] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 03/07/2022] [Accepted: 03/11/2022] [Indexed: 11/26/2022] Open
Abstract
Physical features on the biomaterial surface are known to affect macrophage cell shape and phenotype, providing opportunities for the design of novel “immune-instructive” topographies to modulate foreign body response. The work presented here employed nanopatterned polydimethylsiloxane substrates with well-characterized nanopillars and nanopits to assess RAW264.7 macrophage response to feature size. Macrophages responded to the small nanopillars (SNPLs) substrates (450 nm in diameter with average 300 nm edge-edge spacing), resulting in larger and well-spread cell morphology. Increasing interpillar distance to 800 nm in the large nanopillars (LNPLs) led to macrophages exhibiting morphologies similar to being cultured on the flat control. Macrophages responded to the nanopits (NPTs with 150 nm deep and average 800 nm edge-edge spacing) by a significant increase in cell elongation. Elongation and well-spread cell shape led to expression of anti-inflammatory/pro-healing (M2) phenotypic markers and downregulated expression of inflammatory cytokines. SNPLs and NPTs with high availability of integrin binding region of fibronectin facilitated integrin β1 expression and thus stored focal adhesion formation. Increased integrin β1 expression in macrophages on the SNPLs and NTPs was required for activation of the PI3K/Akt pathway, which promoted macrophage cell spreading and negatively regulated NF-κB activation as evidenced by similar globular cell shape and higher level of NF-κB expression after PI3K blockade. These observations suggested that alterations in macrophage cell shape from surface nanotopographies may provide vital cues to orchestrate macrophage phenotype.
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Affiliation(s)
- Kai Li
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China; (K.L.); (L.L.); (D.S.); (Y.X.); (Y.C.)
| | - Lin Lv
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China; (K.L.); (L.L.); (D.S.); (Y.X.); (Y.C.)
| | - Dandan Shao
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China; (K.L.); (L.L.); (D.S.); (Y.X.); (Y.C.)
- Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing 100049, China
| | - Youtao Xie
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China; (K.L.); (L.L.); (D.S.); (Y.X.); (Y.C.)
| | - Yunzhen Cao
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China; (K.L.); (L.L.); (D.S.); (Y.X.); (Y.C.)
| | - Xuebin Zheng
- Key Laboratory of Inorganic Coating Materials CAS, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 1295 Dingxi Road, Shanghai 200050, China; (K.L.); (L.L.); (D.S.); (Y.X.); (Y.C.)
- Correspondence:
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Perez RA, Jung CR, Kim HW. Biomaterials and Culture Technologies for Regenerative Therapy of Liver Tissue. Adv Healthc Mater 2017; 6. [PMID: 27860372 DOI: 10.1002/adhm.201600791] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 09/10/2016] [Indexed: 12/18/2022]
Abstract
Regenerative approach has emerged to substitute the current extracorporeal technologies for the treatment of diseased and damaged liver tissue. This is based on the use of biomaterials that modulate the responses of hepatic cells through the unique matrix properties tuned to recapitulate regenerative functions. Cells in liver preserve their phenotype or differentiate through the interactions with extracellular matrix molecules. Therefore, the intrinsic properties of the engineered biomaterials, such as stiffness and surface topography, need to be tailored to induce appropriate cellular functions. The matrix physical stimuli can be combined with biochemical cues, such as immobilized functional groups or the delivered actions of signaling molecules. Furthermore, the external modulation of cells, through cocultures with nonparenchymal cells (e.g., endothelial cells) that can signal bioactive molecules, is another promising avenue to regenerate liver tissue. This review disseminates the recent approaches of regenerating liver tissue, with a focus on the development of biomaterials and the related culture technologies.
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Affiliation(s)
- Roman A. Perez
- Institute of Tissue Regeneration Engineering (ITREN); Dankook University; Cheonan 330-714 Republic of Korea
- Regenerative Medicine Research Institute; Universitat Internacional de Catalunya; Barcelona 08017 Spain
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine; Dankook University; Cheonan 330-714 Republic of Korea
| | - Cho-Rok Jung
- Gene Therapy Research Unit; KRIBB; 125 Gwahak-ro Yuseong-gu, Daejeon 34141 Republic of Korea
| | - Hae-Won Kim
- Institute of Tissue Regeneration Engineering (ITREN); Dankook University; Cheonan 330-714 Republic of Korea
- Department of Nanobiomedical Science & BK21 PLUS NBM Global Research Center for Regenerative Medicine; Dankook University; Cheonan 330-714 Republic of Korea
- Department of Biomaterials Science; Dankook University Dental College; Cheonan 330-714 Republic of Korea
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Jain E, Damania A, Shakya AK, Kumar A, Sarin SK, Kumar A. Fabrication of macroporous cryogels as potential hepatocyte carriers for bioartificial liver support. Colloids Surf B Biointerfaces 2015; 136:761-71. [PMID: 26519938 DOI: 10.1016/j.colsurfb.2015.10.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2015] [Revised: 10/03/2015] [Accepted: 10/09/2015] [Indexed: 01/15/2023]
Abstract
Two different cryogels composed of copolymer of acrylonitrile (AN) and N-vinyl-2-pyrrolidone (NVP) (poly(AN-co-NVP)) and interpenetrated polymer networks (IPN) of chitosan and poly(N-isopropylacrylamide) (poly(NiPAAm)-chitosan) were fabricated by gelation at sub-zero temperatures. The two cryogels possess an interconnected network of macropores of size 20-100 μm and efficient transport properties as determined by physiochemical analysis. Both cryogels support in vitro growth and function of fibroblasts (COS-7) and human liver hepatocarcinoma cells (HepG2). The cryogels are hemocompatible as demonstrated by low albumin adsorption and platelet adherence. Furthermore, in vivo implantation of poly(NiPAAm)-chitosan cryogel in mice shows its biocompatibility with the surrounding tissue. Primary rat hepatocytes grown on poly(NiPAAm)-chitosan cryogel for 96 h formed cellular aggregates and maintained their functions in terms of, ammonia removal, ureagenesis and drug detoxification. Cryogel-based closed continuous bioreactor systems could maintain HepG2 cells at high density for 7 days. Off-line clinical evaluation of these cryogel-based bioreactors showed the ability of immobilized cells to detoxify circulating plasma obtained from patients with acute on chronic liver failure (ACLF). Altogether, the presented data suggests cryogels as a potential bioreactor matrix for bio-artificial liver support system.
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Affiliation(s)
- Era Jain
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India
| | - Apeksha Damania
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India
| | - Akhilesh Kumar Shakya
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India
| | - Anupam Kumar
- Institute of Liver and Biliary Sciences, New Delhi, India
| | - Shiv K Sarin
- Institute of Liver and Biliary Sciences, New Delhi, India
| | - Ashok Kumar
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, Kanpur 208016, UP, India.
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Nnadozie CF, Lin J, Govinden R. Selective isolation of bacteria for metagenomic analysis: Impact of membrane characteristics on bacterial filterability. Biotechnol Prog 2015; 31:853-66. [DOI: 10.1002/btpr.2109] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Revised: 05/20/2015] [Indexed: 01/22/2023]
Affiliation(s)
- Chika F. Nnadozie
- Biotechnology Cluster/Microbiology Discipline, School of Life Sciences; University of KwaZulu-Natal (Westville Campus), Private Bag X54001; Durban 4000, South Africa
| | - Johnson Lin
- Biotechnology Cluster/Microbiology Discipline, School of Life Sciences; University of KwaZulu-Natal (Westville Campus), Private Bag X54001; Durban 4000, South Africa
| | - Roshini Govinden
- Biotechnology Cluster/Microbiology Discipline, School of Life Sciences; University of KwaZulu-Natal (Westville Campus), Private Bag X54001; Durban 4000, South Africa
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Weigel T, Schinkel G, Lendlein A. Design and preparation of polymeric scaffolds for tissue engineering. Expert Rev Med Devices 2014; 3:835-51. [PMID: 17280547 DOI: 10.1586/17434440.3.6.835] [Citation(s) in RCA: 175] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Polymeric scaffolds for tissue engineering can be prepared with a multitude of different techniques. Many diverse approaches have recently been under development. The adaptation of conventional preparation methods, such as electrospinning, induced phase separation of polymer solutions or porogen leaching, which were developed originally for other research areas, are described. In addition, the utilization of novel fabrication techniques, such as rapid prototyping or solid free-form procedures, with their many different methods to generate or to embody scaffold structures or the usage of self-assembly systems that mimic the properties of the extracellular matrix are also described. These methods are reviewed and evaluated with specific regard to their utility in the area of tissue engineering.
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Affiliation(s)
- Thomas Weigel
- Department of Polymer Technology, Institute of Polymer Research, GKSS Research Center Geesthacht, Kantstr 55, D-14513 Teltow, Germany.
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Kostadinova A, Seifert B, Albrecht W, Malsch G, Groth T, Lendlein A, Altankov G. Novel Polymer Blends for the Preparation of Membranes for Biohybrid Liver Systems. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:821-39. [DOI: 10.1163/156856209x427005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Aneliya Kostadinova
- a Institute of Biophysics, Bulgarian Academy of Science, Akad. G. Bonchev Str. Bl. 21, 1113 Sofia, Bulgaria
| | - Barbara Seifert
- b GKSS Research Center, Institute of Polymer Research, Kantstrasse 55, 14513 Teltow, Germany
| | - Wolfgang Albrecht
- c GKSS Research Center, Institute of Polymer Research, Kantstrasse 55, 14513 Teltow, Germany
| | - Guenter Malsch
- d GKSS Research Center, Institute of Polymer Research, Kantstrasse 55, 14513 Teltow, Germany
| | - Thomas Groth
- e Biomedical Materials Group, Dept. Pharmaceutics and Biopharmaceutics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Kurt-Mothes-Strasse 1, 06120 Halle (Saale), Germany
| | - Andreas Lendlein
- f GKSS Research Center, Institute of Polymer Research, Kantstrasse 55, 14513 Teltow, Germany
| | - George Altankov
- g ICREA and Institute for Bioengineering of Catalonia, Parc Scientific de Barcelona, Josep Samitier 1/5, 08028 Barcelona, Spain
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Krasteva N, Seifert B, Hopp M, Malsch G, Albrecht W, Altankov G, Groth T. Membranes for biohybrid liver support: the behaviour of C3A hepatoblastoma cells is dependent on the composition of acrylonitrile copolymers. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 16:1-22. [PMID: 15796302 DOI: 10.1163/1568562052843348] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Co-polymers based on acrylonitrile, N-vinylpyrrolidone, aminoethylmethacrylate and sodium methallylsulfonate were used to prepare flat membranes by phase inversion. The surface properties of membranes were characterised by water contact angle measurements, atomic force microscopy and X-ray photoelectron spectroscopy (XPS). Membrane permeability was estimated by porosity measurements with water as test liquid. Human C3A hepatoblastoma cells were plated on these materials. Cell-material interaction was characterised by overall cell morphology, formation of focal adhesion contacts and intercellular junctions. Furthermore, cell proliferation was measured and compared with the functional activity of cells as indicated by 7-ethoxycoumarin-O-deethylation. More hydrophilic materials reduced spreading of cells, formation of focal adhesion and subsequent proliferation while homotypic cell adhesion was facilitated in correlation with stronger expressions of intercellular junctions and improved functional activity. In contrast, membranes with stronger adhesivity enhanced cell proliferation but reduced the functional activity of cells. It was concluded that the co-polymerisation of acrylonitrile with hydrophilic co-monomers, such as N-vinylpyrrolidone, could be used to tailor membrane materials for the application in biohybrid liver support systems.
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Affiliation(s)
- N Krasteva
- Institute of Biophysics, Bulgarian Academy of Sciences, Str. Acad. G. Bonchev, bl. 21, BG-1113 Sofia, Bulgaria
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Altankov G, Albrecht W, Richau K, Groth T, Lendlein A. On the tissue compatibility of poly(ether imide) membranes: an in vitro study on their interaction with human dermal fibroblasts and keratinocytes. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 16:23-42. [PMID: 15796303 DOI: 10.1163/1568562052843320] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Recently we have developed a novel type of membrane based on poly(ether imide) (PEI) which is considered for biomedical application. To improve its physical and biological performance it was modified by blending with poly(benzimidazole) (PBI). In the present study both membranes were characterized in terms of their physicochemical properties and in vitro tissue compatibility using human dermal fibroblasts and keratinocytes. The modified membrane (PEI*) was more hydrophilic, less porous and had an increased surface (zeta) potential. We further found that blending with PBI tends to promote cell contact, at least initially, as indicated by the improved overall cell morphology, adhesion and spreading of fibroblasts, and the development of focal adhesion complexes. The effects of fibronectin (FN) and serum coating were also beneficial when compared to pure PEI and tissue culture polystyrene (TCP), which correlates to a higher adsorption of both FN and vitronectin detected by ELISA. However, a clear tendency for homotypic cellular interaction particularly of keratinocytes was obtained in contact with membranes, which was much stronger pronounced on PEI*. Although the initial adhesion was greater on PEI*, a surprising decrease in cell growth was observed at later stages of incubation, which may be explained with the membrane-promoted cellular aggregation leading to an easier detachment from the substratum. Thus, membranes based on blends of PEI with PBI could provide a tissue compatible scaffold with lowered adhesive properties, which might be a useful tool for the transfer of cells, for example, to in vitro engineered tissue constructs.
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Affiliation(s)
- G Altankov
- GKSS Research Center, Institute of Chemistry, Kantstrasse 55, D-14513 Teltow, Germany
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11
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Jain E, Kumar A. Designing Supermacroporous Cryogels Based on Polyacrylonitrile and a Polyacrylamide–Chitosan Semi-interpenetrating Network. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 20:877-902. [DOI: 10.1163/156856209x444321] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Era Jain
- a Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, 208 016-Kanpur, India
| | - Ashok Kumar
- b Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, 208 016-Kanpur, India
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Parkinson LG, Rea SM, Stevenson AW, Wood FM, Fear MW. The effect of nano-scale topography on keratinocyte phenotype and wound healing following burn injury. Tissue Eng Part A 2011; 18:703-14. [PMID: 21988618 DOI: 10.1089/ten.tea.2011.0307] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Topographic modulation of tissue response is an important consideration in the design and manufacture of a biomaterial. In developing new tissue therapies for skin, all levels of architecture, including the nanoscale need to be considered. Here we show that keratinocyte phenotype is affected by nanoscale changes in topography with cell morphology, proliferation, and migration influenced by the pore size in anodic aluminum oxide membranes. A membrane with a pore size of 300 nm, which enhanced cell phenotype in vitro, was used as a dressing to cover a partial thickness burn injury in the pig. Wounds dressed with the membrane showed evidence of advanced healing with significantly less organizing granulation tissue and more mature epidermal layers than control wounds dressed with a standard burns dressing. The results demonstrate the importance of nanoscale topography in modulating keratinocyte phenotype and skin wound healing.
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Tran RT, Naseri E, Kolasnikov A, Bai X, Yang J. A new generation of sodium chloride porogen for tissue engineering. Biotechnol Appl Biochem 2011; 58:335-44. [DOI: 10.1002/bab.44] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Accepted: 07/13/2011] [Indexed: 01/01/2023]
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Kung KS, Canton I, Massignani M, Battaglia G, Donald AM. The development of anisotropic behaviours of 3T3 fibroblasts on microgrooved patterns. THE EUROPEAN PHYSICAL JOURNAL. E, SOFT MATTER 2011; 34:23. [PMID: 21380646 DOI: 10.1140/epje/i2011-11023-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2010] [Accepted: 02/08/2011] [Indexed: 05/30/2023]
Abstract
3T3 fibroblasts cultured on microgrooved polydimethylsiloxane (PDMS) surfaces of two different widths (25 μm and 55 μm) were individually tracked using confocal microscopy with a novel live-cell staining technique over several hours without noticeable cytotoxic effects. By quantifying the cell morphology, orientation, and migration over time, we identified the timescale (about 2-4 h after seeding) over which cell behaviours transitioned from isotropy to anisotropy, where the preference is in the direction parallel to the pattern. The development of anisotropy occurred more rapidly and distinctly when a narrower ridge width was used, suggesting that it is the ridge width that imposed a physical barrier on the cells' morphology and motility. Furthermore, while we found a weak but statistically significant correlation between cell orientation and morphology on the single-cell level, there is a lack of correlation on the same level between cell orientation and migratory direction. This suggests that while morphology and migration are affected anisotropically by topographical patterns in a similar way, the underlying processes giving rise to the anisotropy is slightly different in the two cases.
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Affiliation(s)
- K S Kung
- Cavendish Laboratory, University of Cambridge, UK
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Wu SH, Hung Y, Mou CY. Mesoporous silica nanoparticles as nanocarriers. Chem Commun (Camb) 2011; 47:9972-85. [DOI: 10.1039/c1cc11760b] [Citation(s) in RCA: 279] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Hu W, Crouch AS, Miller D, Aryal M, Luebke KJ. Inhibited cell spreading on polystyrene nanopillars fabricated by nanoimprinting and in situ elongation. NANOTECHNOLOGY 2010; 21:385301. [PMID: 20739742 DOI: 10.1088/0957-4484/21/38/385301] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Polymer nanopillars (40-80 nm in diameter and 100 nm in pitch) were fabricated at high density over large areas directly on bulk tissue culture polystyrene plates using nanoimprint lithography. Nanoporous Si molds for imprinting were generated by transfer from an anodic alumina membrane. Ultrahigh aspect ratio polymer nanopillars were formed in a novel procedure using controlled elongation of the imprinted pillars during mold release. The resulting nanopillar arrays show significant changes in surface wettability upon brief O(2) plasma treatment. Human dermal fibroblasts were cultured on the nanopillar surfaces in order to study cell-substrate interaction at the nanoscale. The nanopillar topography shows strong effects on the cell morphology, with pillars of widely varying aspect ratios and surface energies resisting cell spreading. This effect on cell behavior can be rationalized in terms of the cells' requirement to form micron-scale focal adhesions. The study indicates that at the nanoscale, physical factors can supersede the effects of chemical factors on the cell-substratum interaction.
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Affiliation(s)
- Walter Hu
- Department of Electrical Engineering, University of Texas at Dallas, Richardson, TX 75080, USA.
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Shadpour H, Allbritton NL. In situ roughening of polymeric microstructures. ACS APPLIED MATERIALS & INTERFACES 2010; 2:1086-93. [PMID: 20423129 PMCID: PMC2861798 DOI: 10.1021/am900860s] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
A method to perform in situ roughening of arrays of microstructures weakly adherent to an underlying substrate was presented. SU8, 1002F, and polydimethylsiloxane (PDMS) microstructures were roughened by polishing with a particle slurry. The roughness and the percentage of dislodged or damaged microstructures was evaluated as a function of the roughening time for both SU8 and 1002F structures. A maximal RMS roughness of 7-18 nm for the surfaces was obtained within 15-30 s of polishing with the slurry. This represented a 4-9 fold increase in surface roughness relative to that of the native surface. Less than 0.8% of the microstructures on the array were removed or damaged after 5 min of polishing. Native and roughened arrays were assessed for their ability to support fibronectin adhesion and cell attachment and growth. The quantity of adherent fibronectin was increased on roughened arrays by two-fold over that on native arrays. Cell adhesion to the roughened surfaces was also increased compared to native surfaces. Surface roughening with the particle slurry also improved the ability to stamp molecules onto the substrate during microcontact printing. Roughening both the PDMS stamp and substrate resulted in up to a 20-fold improvement in the transfer of BSA-Alexa Fluor 647 from the stamp to the substrate. Thus roughening of micrometer-scale surfaces with a particle slurry increased the adhesion of biomolecules as well as cells to microstructures with little to no damage to largescale arrays of the structures.
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Affiliation(s)
- Hamed Shadpour
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, USA
| | - Nancy L. Allbritton
- Department of Chemistry, University of North Carolina, Chapel Hill, North Carolina 27599, USA
- Department of Biomedical Engineering, University of North Carolina, Chapel Hill, 27599, North Carolina, USA, and North Carolina State University, Raleigh, North Carolina 27695, USA
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Biggs MJP, Richards RG, Dalby MJ. Nanotopographical modification: a regulator of cellular function through focal adhesions. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2010; 6:619-33. [PMID: 20138244 DOI: 10.1016/j.nano.2010.01.009] [Citation(s) in RCA: 327] [Impact Index Per Article: 23.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2009] [Revised: 12/02/2009] [Accepted: 01/07/2010] [Indexed: 12/25/2022]
Abstract
UNLABELLED As materials technology and the field of biomedical engineering advances, the role of cellular mechanisms, in particular adhesive interactions with implantable devices, becomes more relevant in both research and clinical practice. A key tenet of medical device design has evolved from the exquisite ability of biological systems to respond to topographical features or chemical stimuli, a process that has led to the development of next-generation biomaterials for a wide variety of clinical disorders. In vitro studies have identified nanoscale features as potent modulators of cellular behavior through the onset of focal adhesion formation. The focus of this review is on the recent developments concerning the role of nanoscale structures on integrin-mediated adhesion and cellular function with an emphasis on the generation of medical constructs with regenerative applications. FROM THE CLINICAL EDITOR In this review, recent developments related to the role of nanoscale structures on integrin-mediated adhesion and cellular function is discussed, with an emphasis on regenerative applications.
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Affiliation(s)
- Manus Jonathan Paul Biggs
- Nanotechnology Center for Mechanics in Regenerative Medicine, Department of Applied Physics and Applied Mathematics, Columbia University, New York, NY, USA.
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Dvir-Ginzberg M, Elkayam T, Cohen S. Induced differentiation and maturation of newborn liver cells into functional hepatic tissue in macroporous alginate scaffolds. FASEB J 2007; 22:1440-9. [PMID: 18070820 DOI: 10.1096/fj.07-9277com] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The present work explores cell cultivation in macroporous alginate scaffolds as a means to reproduce hepatocyte terminal differentiation in vitro. Newborn rat liver cell isolates, consisting of proliferating hepatocytes and progenitors, were seeded at high cell density of 125 x 10(6)/cm(3) within the scaffold and then cultivated for 6 wk in chemically defined medium. Within 3 days, the alginate-seeded cells expressed genes for mature liver enzymes, such as tryptophan oxygenase, secreted a high level of albumin, and performed phase I drug metabolism. The cells formed compacted spheroids, establishing homotypic and heterotypic cell-to-cell interactions. By 6 wk, the spheroids developed into organoids, with an external mature hepatocyte layer covered by a laminin layer encasing inner vimentin-positive cells within a laminin-rich matrix also containing collagen. The hepatocytes presented a distinct apical surface between adjacent cells and a basolateral surface with microvilli facing extracellular matrix deposits. By contrast, viable adherent cells within collagen scaffolds presenting the identical porous structure did not express adult liver enzymes or secrete albumin after 6 wk. This study thus illustrates the benefits of cell cultivation in macroporous alginate scaffolds as an effective promoter for the maturation of newborn liver cells into functional hepatic tissue, capable of maintaining prolonged hepatocellular functions.
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Affiliation(s)
- Mona Dvir-Ginzberg
- Ben-Gurion University of the Negev, Department of Biotechnology Engineering, P.O. 653, Beer-Sheva 84105, Israel
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Boese G, Trimpert C, Albrecht W, Malsch G, Groth T, Lendlein A. Membranes from Acrylonitrile-Based Polymers for Selective Cultivation of Human Keratinocytes. ACTA ACUST UNITED AC 2007; 13:2995-3002. [DOI: 10.1089/ten.2006.0442] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Gregor Boese
- Institute of Polymer Research, GKSS Research Center Geesthacht, Teltow, Germany
| | - Christiane Trimpert
- Klinik und Poliklinik für Innere Medizin B, Universitätsklinikum der Ernst-Moritz-Arndt-Universität, Greifswald, Germany
| | - Wolfgang Albrecht
- Institute of Polymer Research, GKSS Research Center Geesthacht, Teltow, Germany
| | - Günter Malsch
- Institute of Polymer Research, GKSS Research Center Geesthacht, Teltow, Germany
| | - Thomas Groth
- Biomedical Materials Group, Department of Pharmaceutics and Biopharmaceutics, Institute of Pharmacy, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany
| | - Andreas Lendlein
- Institute of Polymer Research, GKSS Research Center Geesthacht, Teltow, Germany
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Wan LS, Xu ZK, Huang XJ, Wang ZG, Ye P. Hemocompatibility of poly(acrylonitrile-co-N-vinyl-2-pyrrolidone)s: swelling behavior and water states. Macromol Biosci 2005; 5:229-36. [PMID: 15768442 DOI: 10.1002/mabi.200400157] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Hemocompatibility is an essential aspect of blood contacting polymers. Knowledge of the relationship between polymer structure and hemocompatibility is important in designing such polymers. In this work, the effect of swelling behavior and states of water on the hemocompatibility of poly(acrylonitrile-co-N-vinyl-2-pyrrolidone) (PANCNVP) films was studied. Platelet adhesion and plasma recalcification time tests were used to evaluate the hemocompatibility of the films. Considering the importance of surface properties on the hemocompatibility of polymers, static water contact angles were measured by both sessile drop and captive bubble methods. It was found that, on the film surface of PANCNVP with a higher NVP content, adhered platelets were remarkably suppressed and the recalcification time was longer. The total water content adsorbed on the PANCNVP film was determined through swelling experiments performed at temperatures of interest. Differential scanning calorimetry and thermogravimetric analysis were used to probe the states of water in the films. Based on the results from these experiments, it was hypothesized that the better hemocompatibility of PANCNVP films with higher NVP contents was due to their higher free water content, because water molecule exchange at the polymer/liquid interface, facilitated by a high free water content, is unfavorable for the formation of surface bound water, which causes poor hemocompatibility. [diagram in text].
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Affiliation(s)
- Ling-Shu Wan
- Institute of Polymer Science, Zhejiang University, Hangzhou 310027, P. R. China
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Heilmann K, Groth T, Behrsing O, Albrecht W, Schossig M, Lendlein A, Micheel B. The influence of the chemical composition of cell culture material on the growth and antibody production of hybridoma cells. J Biotechnol 2005; 115:291-301. [PMID: 15639091 DOI: 10.1016/j.jbiotec.2004.09.004] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2004] [Revised: 09/20/2004] [Accepted: 09/27/2004] [Indexed: 11/17/2022]
Abstract
The multiplication and antibody production of murine hybridoma cells cultured on five different polymer membranes were tested and compared with conventional tissue culture polystyrene (TCPS). Membranes were prepared from polyacrylonitrile (PAN) and acrylonitrile copolymerized with N-vinylpyrrolidone (NVP20, NVP30), Na-methallylsulfonate (NaMAS) and N-(3-amino-propyl-methacrylamide-hydrochloride) (APMA). Cell number and antibody concentration were quantified as criteria for viability and productivity. Adhesion of hybridoma cells was characterized by vital and scanning electron microscopy. The results suggest that a strong adhesion of cells, observed on APMA and TCPS, increased cell growth but reduced monoclonal antibody production. In contrast membranes with lowered adhesivity such as NVP20 provided favourable conditions for monoclonal antibody production. In addition it was shown that this membrane also possessed a minor fouling as indicated by the low decrease of water flux across the membrane after protein adsorption. It was concluded that NVP20 could be a suitable material for the development of hollow fibre membranes for bioreactors.
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Affiliation(s)
- K Heilmann
- Department of Biotechnology, University of Potsdam, Institute of Biochemistry and Biology, Karl-Liebknecht-Strasse 24-25, Building 25, D-14476 Golm, Germany
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