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Karimi F, O'Connor AJ, Qiao GG, Heath DE. Integrin Clustering Matters: A Review of Biomaterials Functionalized with Multivalent Integrin-Binding Ligands to Improve Cell Adhesion, Migration, Differentiation, Angiogenesis, and Biomedical Device Integration. Adv Healthc Mater 2018; 7:e1701324. [PMID: 29577678 DOI: 10.1002/adhm.201701324] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 01/24/2018] [Indexed: 01/17/2023]
Abstract
Material systems that exhibit tailored interactions with cells are a cornerstone of biomaterial and tissue engineering technologies. One method of achieving these tailored interactions is to biofunctionalize materials with peptide ligands that bind integrin receptors present on the cell surface. However, cell biology research has illustrated that both integrin binding and integrin clustering are required to achieve a full adhesion response. This biophysical knowledge has motivated researchers to develop material systems biofunctionalized with nanoscale clusters of ligands that promote both integrin occupancy and clustering of the receptors. These materials have improved a wide variety of biological interactions in vitro including cell adhesion, proliferation, migration speed, gene expression, and stem cell differentiation; and improved in vivo outcomes including increased angiogenesis, tissue healing, and biomedical device integration. This review first introduces the techniques that enable the fabrication of these nanopatterned materials, describes the improved biological effects that have been achieved, and lastly discusses the current limitations of the technology and where future advances may occur. Although this technology is still in its nascency, it will undoubtedly play an important role in the future development of biomaterials and tissue engineering scaffolds for both in vitro and in vivo applications.
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Affiliation(s)
- Fatemeh Karimi
- School of Chemical and Biomedical Engineering; Particulate Fluids Processing Centre; University of Melbourne; Parkville VIC 3010 Australia
- Polymer Science Group; Department of Chemical Engineering; Particulate Fluid Processing Centre; University of Melbourne; Parkville VIC 3010 Australia
| | - Andrea J. O'Connor
- School of Chemical and Biomedical Engineering; Particulate Fluids Processing Centre; University of Melbourne; Parkville VIC 3010 Australia
| | - Greg G. Qiao
- Polymer Science Group; Department of Chemical Engineering; Particulate Fluid Processing Centre; University of Melbourne; Parkville VIC 3010 Australia
| | - Daniel E. Heath
- School of Chemical and Biomedical Engineering; Particulate Fluids Processing Centre; University of Melbourne; Parkville VIC 3010 Australia
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Valdez J, Cook CD, Ahrens CC, Wang AJ, Brown A, Kumar M, Stockdale L, Rothenberg D, Renggli K, Gordon E, Lauffenburger D, White F, Griffith L. On-demand dissolution of modular, synthetic extracellular matrix reveals local epithelial-stromal communication networks. Biomaterials 2017; 130:90-103. [PMID: 28371736 DOI: 10.1016/j.biomaterials.2017.03.030] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Revised: 03/19/2017] [Accepted: 03/21/2017] [Indexed: 02/06/2023]
Abstract
Methods to parse paracrine epithelial-stromal communication networks are a vital need in drug development, as disruption of these networks underlies diseases ranging from cancer to endometriosis. Here, we describe a modular, synthetic, and dissolvable extracellular matrix (MSD-ECM) hydrogel that fosters functional 3D epithelial-stromal co-culture, and that can be dissolved on-demand to recover cells and paracrine signaling proteins intact for subsequent analysis. Specifically, synthetic polymer hydrogels, modified with cell-interacting adhesion motifs and crosslinked with peptides that include a substrate for cell-mediated proteolytic remodeling, can be rapidly dissolved by an engineered version of the microbial transpeptidase Sortase A (SrtA) if the crosslinking peptide includes a SrtA substrate motif and a soluble second substrate. SrtA-mediated dissolution affected only 1 of 31 cytokines and growth factors assayed, whereas standard protease degradation methods destroyed about half of these same molecules. Using co-encapsulated endometrial epithelial and stromal cells as one model system, we show that the dynamic cytokine and growth factor response of co-cultures to an inflammatory cue is richer and more nuanced when measured from SrtA-dissolved gel microenvironments than from the culture supernate. This system employs accessible, reproducible reagents and facile protocols; hence, has potential as a tool in identifying and validating therapeutic targets in complex diseases.
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Affiliation(s)
- Jorge Valdez
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Christi D Cook
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Caroline Chopko Ahrens
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Alex J Wang
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Alexander Brown
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Manu Kumar
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Linda Stockdale
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Daniel Rothenberg
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Kasper Renggli
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Elizabeth Gordon
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Douglas Lauffenburger
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Forest White
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Linda Griffith
- Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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Karimi F, McKenzie TG, O'Connor AJ, Qiao GG, Heath DE. Nano-scale clustering of integrin-binding ligands regulates endothelial cell adhesion, migration, and endothelialization rate: novel materials for small diameter vascular graft applications. J Mater Chem B 2017; 5:5942-5953. [DOI: 10.1039/c7tb01298e] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Blood contacting devices are commonly used in today's medical landscape.
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Affiliation(s)
- Fatemeh Karimi
- School of Chemical and Biomedical Engineering
- Particulate Fluids Processing Centre
- University of Melbourne
- Melbourne
- Australia
| | - Thomas G. McKenzie
- Polymer Science Group
- Department of Chemical Engineering
- Particulate Fluids Processing Centre
- University of Melbourne
- Melbourne
| | - Andrea J. O'Connor
- School of Chemical and Biomedical Engineering
- Particulate Fluids Processing Centre
- University of Melbourne
- Melbourne
- Australia
| | - Greg G. Qiao
- Polymer Science Group
- Department of Chemical Engineering
- Particulate Fluids Processing Centre
- University of Melbourne
- Melbourne
| | - Daniel E. Heath
- School of Chemical and Biomedical Engineering
- Particulate Fluids Processing Centre
- University of Melbourne
- Melbourne
- Australia
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Li Z, Kreiner M, Edrada-Ebel R, Cui Z, van der Walle CF, Mardon HJ. Perfusion culture enhanced human endometrial stromal cell growth in alginate-multivalent integrin α5β1 ligand scaffolds. J Biomed Mater Res A 2011; 99:211-20. [PMID: 21976446 DOI: 10.1002/jbm.a.33177] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2011] [Accepted: 05/25/2011] [Indexed: 01/16/2023]
Abstract
A method to functionalize alginate by introducing monomeric or self-assembling (tetrameric) fibronectin (FN) domains is described, leading to a functional scaffold, which is used for three dimensional (3D) culture of human endometrial stromal cells (EnSCs). EnSCs encapsulated in the functional alginate were cultured under perfusion using the TissueFlex® platform, a multiple parallel microbioreactor system for 3D cell culture. The effect of the novel scaffold and the effect of perfusion were examined. Cell viability, proliferation, and extracellular matrix (ECM) deposition were determined and the results compared with those obtained with cells encapsulated in non-functionalized alginate, and also those without perfusion. Staining for focal adhesions and actin showed maximal cell adhesion only for alginate-tetrameric FN scaffolds under perfusion, associated with a significant increase in cell number over 7 days culture; in contrast to poor cell adhesion and a decrease in cell number for non-functionalized alginate scaffolds (irrespective of perfused/static culture) and 3D static culture (irrespective of the scaffold). Conjugation of alginate to FN was an absolute requirement to attenuate the loss of cell metabolic activity over 7 days culture. ECM deposition for blank alginate and alginate-monomeric FN was similar, but increased around 2-fold and 3-fold for alginate-tetrameric FN under static and perfusion culture, respectively. It is concluded that the requirement for EnSC engagement with multivalent integrin α5β1 ligands and perfused culture are both essential as a first step toward endometrial tissue engineering.
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Affiliation(s)
- Zhaohui Li
- Nuffield Department of Obstetrics and Gynaecology, University of Oxford, John Radcliffe Hospital, Headington, Oxford, United Kingdom
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Rich RL, Myszka DG. Grading the commercial optical biosensor literature-Class of 2008: 'The Mighty Binders'. J Mol Recognit 2010; 23:1-64. [PMID: 20017116 DOI: 10.1002/jmr.1004] [Citation(s) in RCA: 109] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Optical biosensor technology continues to be the method of choice for label-free, real-time interaction analysis. But when it comes to improving the quality of the biosensor literature, education should be fundamental. Of the 1413 articles published in 2008, less than 30% would pass the requirements for high-school chemistry. To teach by example, we spotlight 10 papers that illustrate how to implement the technology properly. Then we grade every paper published in 2008 on a scale from A to F and outline what features make a biosensor article fabulous, middling or abysmal. To help improve the quality of published data, we focus on a few experimental, analysis and presentation mistakes that are alarmingly common. With the literature as a guide, we want to ensure that no user is left behind.
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Affiliation(s)
- Rebecca L Rich
- Center for Biomolecular Interaction Analysis, University of Utah, Salt Lake City, UT 84132, USA
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18F-labeled galacto and PEGylated RGD dimers for PET imaging of αvβ3 integrin expression. Mol Imaging Biol 2009; 12:530-8. [PMID: 19949981 DOI: 10.1007/s11307-009-0284-2] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 07/09/2009] [Accepted: 07/29/2009] [Indexed: 12/19/2022]
Abstract
PURPOSE In vivo imaging of α(v)β(3) has important diagnostic and therapeutic applications. (18)F-Galacto-arginine-glycine-aspartic acid (RGD) has been developed for positron emission tomography (PET) imaging of integrin α(v)β(3) expression and is now being tested on humans. Dimerization and multimerization of cyclic RGD peptides have been reported to improve the integrin α(v)β(3)-binding affinity due to the polyvalency effect. Here, we compared a number of new dimeric RGD peptide tracers with the clinically used (18)F-galacto-RGD. PROCEDURES RGD monomers and dimers were coupled with galacto or PEG(3) linkers, and labeled with (18)F using 4-nitrophenyl 2-(18)F-fluoropropionate ((18)F-NFP) or N-succinimidyl 4-(18)F-fluorobenzoate as a prosthetic group. The newly developed tracers were evaluated by cell-based receptor-binding assay, biodistribution, and small-animal PET studies in a subcutaneous U87MG glioblastoma xenograft model. RESULTS Starting with (18)F-F(-), the total reaction time for (18)F-FP-SRGD2 and (18)F-FP-PRGD2 is about 120 min. The decay-corrected radiochemical yields for (18)F-FP-SRGD2 and (18)F-FP-PRGD2 are 52 ± 9% and 80 ± 7% calculated from (18)F-NFP. Noninvasive small-animal PET and direct tissue sampling experiments demonstrated that the dimeric RGD peptides had significantly higher tumor uptake as compared to (18)F-galacto-RGD. CONCLUSION Dimeric RGD peptide tracers with relatively high tumor integrin-specific accumulation and favorable in vivo kinetics may have the potential to be translated into clinic for integrin α(v)β(3) imaging.
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Beattie J, Kreiner M, Allan GJ, Flint DJ, Domingues D, van der Walle CF. IGFBP-3 and IGFBP-5 associate with the cell binding domain (CBD) of fibronectin. Biochem Biophys Res Commun 2009; 381:572-6. [DOI: 10.1016/j.bbrc.2009.02.088] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2009] [Accepted: 02/18/2009] [Indexed: 10/21/2022]
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