1
|
Krüger-Genge A, Braune S, Walter M, Krengel M, Kratz K, Küpper JH, Lendlein A, Jung F. Influence of different surface treatments of poly(n-butyl acrylate) networks on fibroblasts adhesion, morphology and viability. Clin Hemorheol Microcirc 2018; 69:305-316. [PMID: 29660925 DOI: 10.3233/ch-189130] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Physical and chemical characteristics of implant materials determine the fate of long-term cardiovascular devices. However, there is still a lack of fundamental understanding of the molecular mechanisms occurring in the material-tissue interphase. In a previous study, soft covalently crosslinked poly(n-butyl acrylate) networks (cPnBA) were introduced as sterilizable, non-toxic and immuno-compatible biomaterials with mechanical properties adjustable to blood vessels. Here we study the influence of different surface treatments in particular oxygen plasma modification and fibrinogen deposition as well as a combinatorial approach on the adhesion and viability of fibroblasts. MATERIAL AND METHODS Two types of cPnBA networks with Young's moduli of 0.19±0.01 MPa (cPnBA04) and 1.02±0.01 MPa (cPnBA73) were synthesized and post-modified using oxygen plasma treatment (OPT) or fibrinogen coating (FIB) or a combination of both (OPT+FIB). The water contact angles of the differently post-treated cPnBAs were studied to monitor changes in the wettability of the polymer surfaces. Because of the key role of vascular fibroblasts in regeneration processes around implant materials, here we selected L929 fibroblasts as model cell type to explore morphology, viability, metabolic activity, cell membrane integrity as well as characteristics of the focal adhesions and cell cytoskeleton on the cPnBA surfaces. RESULTS Compared to non-treated cPnBAs the advancing water-contact angles were found to be reduced after all surface modifications (p < 0.05, each), while lowest values were observed after the combined surface treatment (OPT+FIB). The latter differed significantly from the single OPT and FIB. The number of adherent fibroblasts and their adherence behavior differed on both pristine cPnBA networks. The fibroblast density on cPnBA04 was 743±434 cells·mm-2, was about 6.5 times higher than on cPnBA73 with 115±73 cells·mm-2. On cPnBA04 about 20% of the cells were visible as very small, round and buckled cells while all other cells were in a migrating status. On cPnBA73, nearly 50% of fibroblasts were visible as very small, round and buckled cells. The surface functionalization either using oxygen plasma treatment or fibrinogen coating led to a significant increase of adherent fibroblasts, particularly the combination of both techniques, for both cPnBA networks. It is noteworthy to mention that the fibrinogen coating overruled the characteristics of the pristine surfaces; here, the fibroblast densities after seeding were identical for both cPnBA networks. Thus, the binding rather depended on the fibrinogen coating than on the substrate characteristics anymore. While the integrity of the fibroblasts membrane was comparable for both polymers, the MTS tests showed a decreased metabolic activity of the fibroblasts on cPnBA. CONCLUSION The applied surface treatments of cPnBA successfully improved the adhesion of viable fibroblasts. Under resting conditions as well as after shearing the highest fibroblast densities were found on surfaces with combined post-treatment.
Collapse
Affiliation(s)
- A Krüger-Genge
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | - S Braune
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | - M Walter
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Teltow, Germany.,Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg, Senftenberg, Germany
| | - M Krengel
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Teltow, Germany.,Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg, Senftenberg, Germany
| | - K Kratz
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Teltow, Germany.,Helmholtz Virtual Institute "Multifunctional Biomaterials for Medicine", Berlin and Teltow, Germany
| | - J H Küpper
- Institute of Biotechnology, Brandenburg University of Technology Cottbus-Senftenberg, Senftenberg, Germany
| | - A Lendlein
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Teltow, Germany.,Helmholtz Virtual Institute "Multifunctional Biomaterials for Medicine", Berlin and Teltow, Germany.,Institute of Chemistry, University of Potsdam, Potsdam, Germany
| | - F Jung
- Institute of Biomaterial Science and Berlin-Brandenburg Center for Regenerative Therapies (BCRT), Helmholtz-Zentrum Geesthacht, Teltow, Germany.,Helmholtz Virtual Institute "Multifunctional Biomaterials for Medicine", Berlin and Teltow, Germany
| |
Collapse
|
2
|
Trescher K, Roch T, Cui J, Kratz K, Lendlein A, Jung F. Test system for evaluating the influence of polymer properties on primary human keratinocytes and fibroblasts in mono- and coculture. J Biotechnol 2013; 166:58-64. [DOI: 10.1016/j.jbiotec.2013.04.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Accepted: 04/17/2013] [Indexed: 12/14/2022]
|
4
|
Mayer A, Roch T, Kratz K, Lendlein A, Jung F. Pro-angiogenic CD14(++) CD16(+) CD163(+) monocytes accelerate the in vitro endothelialization of soft hydrophobic poly (n-butyl acrylate) networks. Acta Biomater 2012; 8:4253-9. [PMID: 22902818 DOI: 10.1016/j.actbio.2012.08.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2012] [Revised: 08/08/2012] [Accepted: 08/08/2012] [Indexed: 11/17/2022]
Abstract
As the majority of the polymers used as cardiovascular grafts so far do not match the elasticity of human arteries (100-1000kPa) and the required endothelialization, a multifunctional material approach is needed to allow the adjustment of the mechanical properties while at the same time exhibiting a haemocompatible surface. Recently soft poly(n-butyl acrylate) networks (cPnBA) with adjustable mechanical properties were introduced as candidate materials with a surface that can be endothelialized. In this study, angiogenically stimulated intermediate CD163(+) monocytes/macrophages (aMO2) were utilized as a cellular cytokine release system to realize the functional endothelialization of the hydrophobic cPnBA surface. We investigated the influence of co-cultured aMO2 on the morphology, density and cytokine secretion of human umbilical venous endothelial cells (HUVEC) seeded on cPnBA with an elastic modulus of around 250kPa (cPnBA0250). A functional confluent HUVEC monolayer could be developed in the co-culture within 3days. In contrast, the HUVEC in the monoculture exhibited stress fibres, broadened marginal filament bands and significantly more and larger cell-free areas in the monolayer, indicating incomplete cell-substrate binding. Remarkably, a functional confluent monolayer formation could only be achieved in co-cultures; it did not develop with the sole supplementation of recombinant VEGF-A(165) to the HUVEC monocultures (unpublished data). The study demonstrated the multifunctional potential of cPnBA in combination with aMO2 as a cellular cytokine release system, adapting their secretion to the demand of HUVEC. In this way, a functional confluent monolayer could be generated within 3days.
Collapse
Affiliation(s)
- Anke Mayer
- Center for Biomaterial Development and Berlin-Brandenburg Centre for Regenerative Therapies, Institute of Polymer Research, Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | | | | | | | | |
Collapse
|
5
|
Yoshikawa HY, Cui J, Kratz K, Matsuzaki T, Nakabayashi S, Marx A, Engel U, Lendlein A, Tanaka M. Quantitative Evaluation of Adhesion of Osteosarcoma Cells to Hydrophobic Polymer Substrate with Tunable Elasticity. J Phys Chem B 2012; 116:8024-30. [DOI: 10.1021/jp212385p] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Hiroshi Y. Yoshikawa
- Physical Chemistry
of Biosystems, Institute of Physical Chemistry, University of Heidelberg, 69120 Heidelberg, Germany
- Department of Chemistry, Saitama University, 338-8570 Saitama, Japan
| | - Jing Cui
- Centre for Biomaterial Development
and Berlin-Brandenburg Center for Regenerative Therapies, Institute
of Polymer Research, Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany
| | - Karl Kratz
- Centre for Biomaterial Development
and Berlin-Brandenburg Center for Regenerative Therapies, Institute
of Polymer Research, Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany
| | | | | | - Astrid Marx
- Nikon Imaging Center at the University of Heidelberg, BIOQUANT, 69120 Heidelberg, Germany
| | - Ulrike Engel
- Nikon Imaging Center at the University of Heidelberg, BIOQUANT, 69120 Heidelberg, Germany
| | - Andreas Lendlein
- Centre for Biomaterial Development
and Berlin-Brandenburg Center for Regenerative Therapies, Institute
of Polymer Research, Helmholtz-Zentrum Geesthacht, 14513 Teltow, Germany
| | - Motomu Tanaka
- Cell Biophysics Group, Institute for Toxicology and
Genetics, Karlsruhe Institute of Technology, 76131 Karlsruhe, Germany
| |
Collapse
|