1
|
Coating of cobalt chrome substrates with thin films of polar/hydrophobic/ionic polyurethanes: Characterization and interaction with human immunoglobulin G and fibronectin. Colloids Surf B Biointerfaces 2019; 179:114-120. [PMID: 30952017 DOI: 10.1016/j.colsurfb.2019.03.040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Revised: 02/14/2019] [Accepted: 03/18/2019] [Indexed: 01/13/2023]
Abstract
Biomaterial implants often lead to specific tissue reactions that could compromise their bio-integration and/or optimal cellular interactions. Polyurethanes (PU) are of particular interest as coatings to mask CoCr's bioactivity, since they are generally more biocompatible than metal substrates, present a broad range of chemistry, and have highly tunable-mechanical properties. In the current work, complex polyvinyl-urethanes (referred to as D-PHI materials) are studied for their surface phase structures: specifically, an original D-PHI polymer (O-D-PHI) and a differential formulation with relatively higher hydrophobic and ionic content (HHHI) are of interest. The PUs are diluted in tetrahydrofuran (THF) to generate thin films which differentially influence the physical and chemical properties of the D-PHI coatings. AFM images over time show the gradual appearance of domains exhibiting crystalline organisation, and whose shape and size were dependent on D-PHI thickness (thin films vs non-solvent cast resin materials). After three weeks, a complete stabilization of the crystal state is observed. The thin coatings are stable in an aqueous and 37 °C environment. The adsorption of two human plasmatic proteins Immunoglobulin G (IgG) and Fibronectin (Fn), involved in inflammation and coagulation, was studied. The exposure of specific protein sequences (IgG-Fab, Fn-Cell Binding Domain and Fn-N-terminal domain) were dramatically reduced on both D-PHI materials when compared to bare metal CoCr. The implications of these findings would be relevant to defining coating strategies used to improve the blood clotting and immune cell reactivity to CoCr implant materials.
Collapse
|
2
|
Shape recovery strain and nanostructures on recovered polyurethane films and their regulation to osteoblasts morphology. J Mech Behav Biomed Mater 2019; 92:128-136. [PMID: 30685726 DOI: 10.1016/j.jmbbm.2019.01.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 12/17/2018] [Accepted: 01/09/2019] [Indexed: 11/21/2022]
Abstract
Shape memory polyurethanes (SMPUs) have emerged as novel dynamic substrates to regulate cell alignment, in which recovery-induced change in substrates topography has been described as the major contributor. This work, for the first time, confirmed the pivotal roles of recovery strain and phase-separated nanostructures of SMPUs in regulating cell morphology. SMPU films with different stretching ratios (0%, 50%, 100%, and 200%) were found to produce an average recovery strain from 19.41% to 34.04% within 2 h in dulbecco's modified eagle medium (DMEM). Meanwhile, the assembly of hard domains was enhanced during shape recovery, leading to the reorientation of fibrillar apophyses (i.e., nanostructures). Further observation of osteoblast morphology revealed that recovery strain resulted in perpendicular orientation of osteoblasts to strain direction. With the extension of incubation time (24 h), however, the perpendicular orientation was transformed to follow the nanostructures on recovered films, suggesting that the nanostructures might become the determinant of the long-term cell orientation. This study provides a biomechanics-based perspective to understand the dynamic interactions between SMPU and cells, which can help to guide the design of SMPU for specific biomedical applications.
Collapse
|
3
|
Wu H, Shang Y, Zhang J, Cheang LH, Zeng X, Tu M. The effects of liquid crystal-based composite substrates on cell functional responses of human umbilical cord-derived mesenchymal stem cells by mechano-regulatory process. J Biomater Appl 2017; 32:492-503. [DOI: 10.1177/0885328217733378] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Hao Wu
- Department of Orthopaedics, The First Affiliated Hospital, Jinan University, Guangzhou, China
| | - Yupan Shang
- Department of Biochemistry and Molecular Biology, School of Medicine, Jinan University, Guangzhou, China
| | - Jiaqing Zhang
- Department of Biochemistry and Molecular Biology, School of Medicine, Jinan University, Guangzhou, China
| | - Lek Hang Cheang
- Macau Medical Science & Technology Research Association, Macao, China
| | - Xiaoli Zeng
- Department of Biochemistry and Molecular Biology, School of Medicine, Jinan University, Guangzhou, China
| | - Mei Tu
- Department of Materials Science and Engineering, Jinan University, Guangzhou, China
| |
Collapse
|
4
|
Hill MJ, Sarkar D. Polyurethane Microgel Based Microtissue: Interface-Guided Assembly and Spreading. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:6167-6181. [PMID: 28564546 PMCID: PMC7214101 DOI: 10.1021/acs.langmuir.7b01493] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Colloidal gels are three-dimensional networks of microgel particles and can be utilized to design microtissues where the differential adhesive interactions between the particles and cells, guided by their surface energetics, are engineered to spatially assemble the cellular and colloidal components into three-dimensional microtissues. In this work we utilized a colloidal interaction approach to design cell-polyurethane (PU) microgel bimodal microtissues using endothelial cells (ECs) as a normal cell model and a nonmalignant breast cancer cell line (MCF-7) as a cancer cell model. PU microgels were developed from a library of segmental polyurethanes with poly(ethylene glycol) soft segment and aliphatic diisocyanate/l-tyrosine based chain extender as hard segment to modulate the interactions between PU colloidal particles and cells. The surface energies of the microgel particles and cells were estimated using Zisman's critical surface tension and van Oss-Good-Chaudhury theory (vOGCT) from liquid contact angle analysis. Binary interaction potentials between colloidal PU particles and cells and the ternary interaction between colloidal PU particle, cell, and collagen I/Matrigel were calculated to explain the formation of microtissues and their spreading in extraneous biomatrix respectively by using classical and extended DLVO theory (XDLVO). Furthermore, rheological analysis and in silico simulations were used to analyze the assembly and spreading of the PU microgel based microtissues. In vitro experiments showed that ECs and MCF-7 displayed more differentiated (EC spreading/MCF-7 lumen formation) character when mixed with microgel particles that were stable in aqueous medium and more undifferentiated character (EC nonspreading/MCF-7 spreading) when mixed with microgel particles unstable in aqueous medium.
Collapse
Affiliation(s)
- Michael J. Hill
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Debanjan Sarkar
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| |
Collapse
|
5
|
Hill MJ, Cheah C, Sarkar D. Interfacial energetics approach for analysis of endothelial cell and segmental polyurethane interactions. Colloids Surf B Biointerfaces 2016; 144:46-56. [DOI: 10.1016/j.colsurfb.2016.03.082] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Revised: 03/24/2016] [Accepted: 03/30/2016] [Indexed: 01/27/2023]
|
6
|
Xing J, Ma Y, Lin M, Wang Y, Pan H, Ruan C, Luo Y. Stretching-induced nanostructures on shape memory polyurethane films and their regulation to osteoblasts morphology. Colloids Surf B Biointerfaces 2016; 146:431-41. [PMID: 27395036 DOI: 10.1016/j.colsurfb.2016.06.044] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Revised: 06/09/2016] [Accepted: 06/25/2016] [Indexed: 10/24/2022]
Abstract
Programming such as stretching, compression and bending is indispensible to endow polyurethanes with shape memory effects. Despite extensive investigations on the contributions of programming processes to the shape memory effects of polyurethane, less attention has been paid to the nanostructures of shape memory polyurethanes surface during the programming process. Here we found that stretching could induce the reassembly of hard domains and thereby change the nanostructures on the film surfaces with dependence on the stretching ratios (0%, 50%, 100%, and 200%). In as-cast polyurethane films, hard segments sequentially assembled into nano-scale hard domains, round or fibrillar islands, and fibrillar apophyses. Upon stretching, the islands packed along the stretching axis to form reoriented fibrillar apophyses along the stretching direction. Stretching only changed the chemical patterns on polyurethane films without significantly altering surface roughness, with the primary composition of fibrillar apophyses being hydrophilic hard domains. Further analysis of osteoblasts morphology revealed that the focal adhesion formation and osteoblasts orientation were in accordance with the chemical patterns of the underlying stretched films, which corroborates the vital roles of stretching-induced nanostructures in regulating osteoblasts morphology. These novel findings suggest that programming might hold great potential for patterning polyurethane surfaces so as to direct cellular behavior. In addition, this work lays groundwork for guiding the programming of shape memory polyurethanes to produce appropriate nanostructures for predetermined medical applications.
Collapse
Affiliation(s)
- Juan Xing
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, and Research Center of Bioinspired Materials Science and Engineering, College of Bioengineering, Chongqing University, Chongqing 400030, China
| | - Yufei Ma
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, and Research Center of Bioinspired Materials Science and Engineering, College of Bioengineering, Chongqing University, Chongqing 400030, China; Center for Human Tissue and Organs Degeneration, Institute Biomedical and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Manping Lin
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, and Research Center of Bioinspired Materials Science and Engineering, College of Bioengineering, Chongqing University, Chongqing 400030, China
| | - Yuanliang Wang
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, and Research Center of Bioinspired Materials Science and Engineering, College of Bioengineering, Chongqing University, Chongqing 400030, China
| | - Haobo Pan
- Center for Human Tissue and Organs Degeneration, Institute Biomedical and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Changshun Ruan
- Center for Human Tissue and Organs Degeneration, Institute Biomedical and Biotechnology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China.
| | - Yanfeng Luo
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, and Research Center of Bioinspired Materials Science and Engineering, College of Bioengineering, Chongqing University, Chongqing 400030, China.
| |
Collapse
|
7
|
Nalluri SM, Krishnan GR, Cheah C, Arzumand A, Yuan Y, Richardson CA, Yang S, Sarkar D. Hydrophilic polyurethane matrix promotes chondrogenesis of mesenchymal stem cells. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 54:182-95. [PMID: 26046282 PMCID: PMC5201126 DOI: 10.1016/j.msec.2015.05.043] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Revised: 03/20/2015] [Accepted: 05/11/2015] [Indexed: 12/13/2022]
Abstract
Segmental polyurethanes exhibit biphasic morphology and can control cell fate by providing distinct matrix guided signals to increase the chondrogenic potential of mesenchymal stem cells (MSCs). Polyethylene glycol (PEG) based hydrophilic polyurethanes can deliver differential signals to MSCs through their matrix phases where hard segments are cell-interactive domains and PEG based soft segments are minimally interactive with cells. These coordinated communications can modulate cell-matrix interactions to control cell shape and size for chondrogenesis. Biphasic character and hydrophilicity of polyurethanes with gel like architecture provide a synthetic matrix conducive for chondrogenesis of MSCs, as evidenced by deposition of cartilage-associated extracellular matrix. Compared to monophasic hydrogels, presence of cell interactive domains in hydrophilic polyurethanes gels can balance cell-cell and cell-matrix interactions. These results demonstrate the correlation between lineage commitment and the changes in cell shape, cell-matrix interaction, and cell-cell adhesion during chondrogenic differentiation which is regulated by polyurethane phase morphology, and thus, represent hydrophilic polyurethanes as promising synthetic matrices for cartilage regeneration.
Collapse
Affiliation(s)
- Sandeep M Nalluri
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - G Rajesh Krishnan
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Calvin Cheah
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Ayesha Arzumand
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Yuan Yuan
- Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Caley A Richardson
- Department of Chemistry, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA
| | - Shuying Yang
- Department of Oral Biology, School of Dental Medicine, University at Buffalo, The State University of New York, Buffalo, NY 14214, USA
| | - Debanjan Sarkar
- Department of Chemical and Biological Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA; Department of Biomedical Engineering, University at Buffalo, The State University of New York, Buffalo, NY 14260, USA.
| |
Collapse
|
8
|
Luo B, Yuan S, Foo SEM, Wong MTC, Lim TC, Tan NS, Choong C. From flab to fab: transforming surgical waste into an effective bioactive coating material. Adv Healthc Mater 2015; 4:613-20. [PMID: 25424903 DOI: 10.1002/adhm.201400514] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2014] [Revised: 11/07/2014] [Indexed: 12/31/2022]
Abstract
Cellular events are regulated by the interaction between integrin receptors in the cell membrane and the extracellular matrix (ECM). Hence, ECM, as a material, can potentially play an instructive role in cell-material interactions. Currently, adipose tissue in the form of lipoaspirate is often discarded. Here, it is demonstrated how our chemical-free decellularization method could be used to obtain ECM from human lipoaspirate waste material. These investigations show that the main biological components are retained in the lipoaspirate-derived ECM (LpECM) material and that this LpECM material could subsequently be used as a coating material to confer bioactivity to an otherwise inert biodegradable material (i.e., polycaprolactone). Overall, lipoaspirate material, a complex blend of endogenous proteins, is effectively used a bioactive coating material. This work is an important stepping-stone towards the development of biohybrid scaffolds that contain cellular benefits without requiring the use of additional biologics based on commonly discarded lipoaspirate material.
Collapse
Affiliation(s)
- Baiwen Luo
- Division of Materials Technology; School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
| | - Shaojun Yuan
- Division of Materials Technology; School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
| | - Selin Ee Min Foo
- School of Biological Sciences; Nanyang Technological University; 60 Nanyang Avenue 638557 Singapore
| | - Marcus Thien Chong Wong
- Plastic, Reconstructive and Aesthetic Surgery Section; Tan Tock Seng, Hospital; 11, Jalan Tan Tock Seng 308433 Singapore
| | - Thiam Chye Lim
- Division of Plastic; Reconstructive and Aesthetic Surgery; National University Hospital; 5, Lower Kent Ridge Road 119074 Singapore
| | - Nguan Soon Tan
- School of Biological Sciences; Nanyang Technological University; 60 Nanyang Avenue 638557 Singapore
- Institute of Cell and Molecular Biology; Agency for Science Technology and Research; 61, Biopolis Drive, Proteos Building 138673 Singapore
| | - Cleo Choong
- Division of Materials Technology; School of Materials Science and Engineering; Nanyang Technological University; 50 Nanyang Avenue 639798 Singapore
| |
Collapse
|
9
|
Khan M, Yang J, Shi C, Feng Y, Zhang W, Gibney K, Tew GN. Manipulation of polycarbonate urethane bulk properties via incorporated zwitterionic polynorbornene for tissue engineering applications. RSC Adv 2015. [DOI: 10.1039/c4ra14608e] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
|
10
|
Xing Q, Yates K, Vogt C, Qian Z, Frost MC, Zhao F. Increasing mechanical strength of gelatin hydrogels by divalent metal ion removal. Sci Rep 2014; 4:4706. [PMID: 24736500 PMCID: PMC3988488 DOI: 10.1038/srep04706] [Citation(s) in RCA: 222] [Impact Index Per Article: 22.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 03/28/2014] [Indexed: 01/01/2023] Open
Abstract
The usage of gelatin hydrogel is limited due to its instability and poor mechanical properties, especially under physiological conditions. Divalent metal ions present in gelatin such as Ca(2+) and Fe(2+) play important roles in the gelatin molecule interactions. The objective of this study was to determine the impact of divalent ion removal on the stability and mechanical properties of gelatin gels with and without chemical crosslinking. The gelatin solution was purified by Chelex resin to replace divalent metal ions with sodium ions. The gel was then chemically crosslinked by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC). Results showed that the removal of divalent metal ions significantly impacted the formation of the gelatin network. The purified gelatin hydrogels had less interactions between gelatin molecules and form larger-pore network which enabled EDC to penetrate and crosslink the gel more efficiently. The crosslinked purified gels showed small swelling ratio, higher crosslinking density and dramatically increased storage and loss moduli. The removal of divalent ions is a simple yet effective method that can significantly improve the stability and strength of gelatin hydrogels. The in vitro cell culture demonstrated that the purified gelatin maintained its ability to support cell attachment and spreading.
Collapse
Affiliation(s)
- Qi Xing
- Stem Cell and Tissue Engineering Lab, Department of Biomedical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931
| | - Keegan Yates
- Stem Cell and Tissue Engineering Lab, Department of Biomedical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931
| | - Caleb Vogt
- Stem Cell and Tissue Engineering Lab, Department of Biomedical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931
| | - Zichen Qian
- Stem Cell and Tissue Engineering Lab, Department of Biomedical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931
| | - Megan C. Frost
- Polymer and Biomaterial Lab, Department of Biomedical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931
| | - Feng Zhao
- Stem Cell and Tissue Engineering Lab, Department of Biomedical Engineering, Michigan Technological University, 1400 Townsend Drive, Houghton, MI 49931
| |
Collapse
|