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Johnson BM, Johnson AM, Heim M, Buckley M, Mortimer B, Berry JL, Sewell-Loftin MK. Biomechanical stimulation promotes blood vessel growth despite VEGFR-2 inhibition. BMC Biol 2023; 21:290. [PMID: 38072992 PMCID: PMC10712065 DOI: 10.1186/s12915-023-01792-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Accepted: 12/01/2023] [Indexed: 12/18/2023] Open
Abstract
BACKGROUND Angiogenesis, or the growth of new vasculature from existing blood vessels, is widely considered a primary hallmark of cancer progression. When a tumor is small, diffusion is sufficient to receive essential nutrients; however, as the tumor grows, a vascular supply is needed to deliver oxygen and nutrients into the increasing mass. Several anti-angiogenic cancer therapies target VEGF and the receptor VEGFR-2, which are major promoters of blood vessel development. Unfortunately, many of these cancer treatments fail to completely stop angiogenesis in the tumor microenvironment (TME). Since these therapies focus on the biochemical activation of VEGFR-2 via VEGF ligand binding, we propose that mechanical cues, particularly those found in the TME, may be a source of VEGFR-2 activation that promotes growth of blood vessel networks even in the presence of VEGF and VEGFR-2 inhibitors. RESULTS In this paper, we analyzed phosphorylation patterns of VEGFR-2, particularly at Y1054/Y1059 and Y1214, stimulated via either VEGF or biomechanical stimulation in the form of tensile strains. Our results show prolonged and enhanced activation at both Y1054/Y1059 and Y1214 residues when endothelial cells were stimulated with strain, VEGF, or a combination of both. We also analyzed Src expression, which is downstream of VEGFR-2 and can be activated through strain or the presence of VEGF. Finally, we used fibrin gels and microfluidic devices as 3D microtissue models to simulate the TME. We determined that regions of mechanical strain promoted increased vessel growth, even with VEGFR-2 inhibition through SU5416. CONCLUSIONS Overall, understanding both the effects that biomechanical and biochemical stimuli have on VEGFR-2 activation and angiogenesis is an important factor in developing effective anti-angiogenic therapies. This paper shows that VEGFR-2 can be mechanically activated through strain, which likely contributes to increased angiogenesis in the TME. These proof-of-concept studies show that small molecular inhibitors of VEGFR-2 do not fully prevent angiogenesis in 3D TME models when mechanical strains are introduced.
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Affiliation(s)
- Bronte Miller Johnson
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6th Avenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, USA
| | - Allison McKenzie Johnson
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6th Avenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, USA
| | - Michael Heim
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6th Avenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, USA
| | - Molly Buckley
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6th Avenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, USA
| | - Bryan Mortimer
- Heersink School of Medicine, University of Alabama at Birmingham, Birmingham, AL, 35233, USA
| | - Joel L Berry
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6th Avenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, USA
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, 35233, USA
| | - Mary Kathryn Sewell-Loftin
- Department of Biomedical Engineering, University of Alabama at Birmingham, 1824 6th Avenue South, Wallace Tumor Institute, Room 630A, Birmingham, AL, 35294, USA.
- O'Neal Comprehensive Cancer Center, University of Alabama at Birmingham, Birmingham, AL, 35233, USA.
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Law J, Wang X, Luo M, Xin L, Du X, Dou W, Wang T, Shan G, Wang Y, Song P, Huang X, Yu J, Sun Y. Microrobotic swarms for selective embolization. SCIENCE ADVANCES 2022; 8:eabm5752. [PMID: 35857830 PMCID: PMC9299543 DOI: 10.1126/sciadv.abm5752] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Inspired by the collective intelligence in natural swarms, microrobotic agents have been controlled to form artificial swarms for targeted drug delivery, enhanced imaging, and hyperthermia. Different from these well-investigated tasks, this work aims to develop microrobotic swarms for embolization, which is a clinical technique used to block blood vessels for treating tumors, fistulas, and arteriovenous malformations. Magnetic particle swarms were formed for selective embolization to address the low selectivity of the present embolization technique that is prone to cause complications such as stroke and blindness. We established an analytical model that describes the relationships between fluid viscosity, flow rate, branching angle, magnetic field strength, and swarm integrity, based on which an actuation strategy was developed to maintain the swarm integrity inside a targeted region under fluidic flow conditions. Experiments in microfluidic channels, ex vivo tissues, and in vivo porcine kidneys validated the efficacy of the proposed strategy for selective embolization.
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Affiliation(s)
- Junhui Law
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
- Shenzhen Institute of Artificial Intelligence and Robotics for Society, Shenzhen, China
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, China
| | - Xian Wang
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Canada
- Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Canada
| | - Mengxi Luo
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
| | - Liming Xin
- School of Computer Engineering and Science, Shanghai University, Shanghai, China
| | - Xingzhou Du
- Shenzhen Institute of Artificial Intelligence and Robotics for Society, Shenzhen, China
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, China
| | - Wenkun Dou
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
| | - Tiancong Wang
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
| | - Guanqiao Shan
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
| | - Yibin Wang
- Shenzhen Institute of Artificial Intelligence and Robotics for Society, Shenzhen, China
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, China
| | - Peng Song
- Department of Interventional Therapy, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital and Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Shenzhen, China
- Corresponding author. (P.S.); (J.Y.); (Y.S.)
| | - Xi Huang
- Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Canada
- Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Jiangfan Yu
- Shenzhen Institute of Artificial Intelligence and Robotics for Society, Shenzhen, China
- School of Science and Engineering, The Chinese University of Hong Kong, Shenzhen, China
- Corresponding author. (P.S.); (J.Y.); (Y.S.)
| | - Yu Sun
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
- Institute of Biomedical Engineering, University of Toronto, Toronto, Canada
- Department of Electrical and Computer Engineering, University of Toronto, Toronto, Canada
- Department of Computer Science, University of Toronto, Toronto, Canada
- Robotics Institute, University of Toronto, Toronto, Canada
- Corresponding author. (P.S.); (J.Y.); (Y.S.)
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Platelet-Rich Plasma as an Alternative to Xenogeneic Sera in Cell-Based Therapies: A Need for Standardization. Int J Mol Sci 2022; 23:ijms23126552. [PMID: 35742995 PMCID: PMC9223511 DOI: 10.3390/ijms23126552] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/09/2022] [Accepted: 06/10/2022] [Indexed: 12/12/2022] Open
Abstract
There has been an explosion in scientific interest in using human-platelet-rich plasma (PRP) as a substitute of xenogeneic sera in cell-based therapies. However, there is a need to create standardization in this field. This systematic review is based on literature searches in PubMed and Web of Science databases until June 2021. Forty-one studies completed the selection criteria. The composition of PRP was completely reported in less than 30% of the studies. PRP has been used as PRP-derived supernatant or non-activated PRP. Two ranges could be identified for platelet concentration, the first between 0.14 × 106 and 0.80 × 106 platelets/µL and the second between 1.086 × 106 and 10 × 106 platelets/µL. Several studies have pooled PRP with a pool size varying from four to nine donors. The optimal dose for the PRP or PRP supernatant is 10%. PRP or PRP-derived supernatants a have positive effect on MSC colony number and size, cell proliferation, cell differentiation and genetic stability. The use of leukocyte-depleted PRP has been demonstrated to be a feasible alternative to xenogeneic sera. However, there is a need to improve the description of the PRP preparation methodology as well as its composition. Several items are identified and reported to create guidelines for future research.
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Vascular Graft Infections: An Overview of Novel Treatments Using Nanoparticles and Nanofibers. FIBERS 2022. [DOI: 10.3390/fib10020012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Vascular disease in elderly patients is a growing health concern, with an estimated prevalence of 15–20% in patients above 70 years old. Current treatment for vascular diseases requires the use of a vascular graft (VG) to revascularize lower or upper extremities, create dialysis access, treat aortic aneurysms, and repair dissection. However, postoperative infection is a major complication associated with the use of these VG, often necessitating several operations to achieve complete or partial graft excision, vascular coverage, and extra-anatomical revascularization. There is also a high risk of morbidity, mortality, and limb loss. Therefore, it is important to develop a method to prevent or reduce the incidence of these infections. Numerous studies have investigated the efficacy of antibiotic- and antiseptic-impregnated grafts. In comparison to these traditional methods of creating antimicrobial grafts, nanotechnology enables researchers to design more efficient VG. Nanofibers and nanoparticles have a greater surface area compared to bulk materials, allowing for more efficient encapsulation of antibiotics and better control over their temporo-spatial release. The disruptive potential of nanofibers and nanoparticles is exceptional, and they could pave the way for a new generation of prosthetic VG. This review aims to discuss how nanotechnology is shaping the future of cardiovascular-related infection management.
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Yao J, Yao C, Zhang A, Xu X, Wu A, Yang F. Magnetomechanical force: an emerging paradigm for therapeutic applications. J Mater Chem B 2022; 10:7136-7147. [DOI: 10.1039/d2tb00428c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Mechanical forces, which play an profound role in cell fate regulation, have prompted the rapid development and popularization of mechanobiology. More recently, magnetic fields in combination with intelligent materials featuring...
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Abstract
The presented paper is a review article discussing existing synthesis methods and different applications of nanosized magnetic nanoparticles. It was shown that, in addition to the spectrum of properties typical for nanomaterials (primarily a large specific surface area and a high fraction of surface atoms), magnetic nanoparticles also possess superparamagnetic properties that contribute to their formation of an important class of biomedical functional nanomaterials. This primarily concerns iron oxides magnetite and maghemite, for which in vitro and in vivo studies have shown low toxicity and high biocompatibility in comparison with other magnetic nanomaterials. Due to their exceptional chemical, biological, and physical properties, they are widely used in various areas, such as magnetic hyperthermia, targeted drug delivery, tissue engineering, magnetic separation of biological objects (cells, bacteria, viruses, DNA, and proteins), and magnetic diagnostics (they are used as agents for MRS and immunoassay). In addition to discussing the main problems and prospects of using nanoparticles of magnetic iron oxides for advanced biomedical applications, information is also reflected on their structure, production methods, and properties.
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8
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Modulation of aggregation of silk fibroin by synergistic effect of the complex of curcumin and β-cyclodextrin. BIOCHIMICA ET BIOPHYSICA ACTA. PROTEINS AND PROTEOMICS 2019; 1867:416-425. [PMID: 30677520 DOI: 10.1016/j.bbapap.2019.01.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Revised: 12/14/2018] [Accepted: 01/18/2019] [Indexed: 02/07/2023]
Abstract
Amyloid aggregation has been associated with numerous human pathological diseases. A recent study has demonstrated that silk fibroin intermittently endorses amyloidogenesis in vivo. In the current study, we explored the propensity of silk fibroin to undergo amyloid-like aggregation and its prevention using an optimized concoction of curcumin with β-cyclodextrin. Aggregation of silk fibroin resulted in the formation of fibrils with a diameter of ~3.2 nm. However, addition of the optimized concentration of curcumin and β-cyclodextrin to silk fibroin inhibited aggregation and preserved the random coil conformation even under aggregation inducing conditions, as demonstrated by CD and FTIR spectroscopy. Benzene rings of curcumin interact with the aromatic residues of fibroin via hydrophobic interactions. However, β-cyclodextrin preferentially interacts with the non-polar residues, which are the core components for nucleation dependent protein aggregation. The present study demonstrates the ability of the concoction of curcumin and β-cyclodextrin in tuning the self assembly process of fibroin. It also provides a platform to explore the assembly process of nano-fibril and hierarchical structures in vitro along with a novel insight for designing clinically relevant silk-based functional biomaterials.
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Hoque J, Sangaj N, Varghese S. Stimuli-Responsive Supramolecular Hydrogels and Their Applications in Regenerative Medicine. Macromol Biosci 2019; 19:e1800259. [PMID: 30295012 PMCID: PMC6333493 DOI: 10.1002/mabi.201800259] [Citation(s) in RCA: 109] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 09/10/2018] [Indexed: 12/16/2022]
Abstract
Supramolecular hydrogels are a class of self-assembled network structures formed via non-covalent interactions of the hydrogelators. These hydrogels capable of responding to external stimuli are considered to be smart materials due to their ability to undergo sol-gel and/or gel-sol transition upon subtle changes in their surroundings. Such stimuli-responsive hydrogels are intriguing biomaterials with applications in tissue engineering, delivery of cells and drugs, modulating tissue environment to promote innate tissue repair, and imaging for medical diagnostics among others. This review summarizes the recent developments in stimuli-responsive supramolecular hydrogels and their potential applications in regenerative medicine. Specifically, various structural aspects of supramolecular hydrogelators involved in self-assembly, the role of external stimuli in tuning/controlling their phase transitions, and how these functions could be harnessed to advance applications in regenerative medicine are focused on. Finally, the key challenges and future prospects for these versatile materials are briefly described.
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Affiliation(s)
- Jiaul Hoque
- Department of Orthopaedic Surgery, Duke University, Durham 27710, NC,
| | - Nivedita Sangaj
- Department of Orthopaedic Surgery, Duke University, Durham 27710, NC
| | - Shyni Varghese
- Department of Orthopaedic Surgery, Department of Biomedical Engineering, Department of Mechanical Engineering and Materials Science, Duke University, Durham 27710, NC
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Dubey P, Ghosh S, Banerjee S. WITHDRAWN: Synergistic Effect of Curcumin and β-cyclodextrin on Inhibition of Silk Fibroin Self Assembly. Arch Biochem Biophys 2018:S0003-9861(18)30514-9. [PMID: 30145114 DOI: 10.1016/j.abb.2018.08.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 08/12/2018] [Accepted: 08/21/2018] [Indexed: 11/21/2022]
Affiliation(s)
- Priyanka Dubey
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sourabh Ghosh
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India
| | - Sauradipta Banerjee
- Department of Textile Technology, Indian Institute of Technology Delhi, Hauz Khas, New Delhi 110016, India.
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11
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Pagaduan JV, Bhatta A, Romer LH, Gracias DH. 3D Hybrid Small Scale Devices. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2018; 14:e1702497. [PMID: 29749014 DOI: 10.1002/smll.201702497] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 02/07/2018] [Indexed: 06/08/2023]
Abstract
Interfacing nano/microscale elements with biological components in 3D contexts opens new possibilities for mimicry, bionics, and augmentation of organismically and anatomically inspired materials. Abiotic nanoscale elements such as plasmonic nanostructures, piezoelectric ribbons, and thin film semiconductor devices interact with electromagnetic fields to facilitate advanced capabilities such as communication at a distance, digital feedback loops, logic, and memory. Biological components such as proteins, polynucleotides, cells, and organs feature complex chemical synthetic networks that can regulate growth, change shape, adapt, and regenerate. Abiotic and biotic components can be integrated in all three dimensions in a well-ordered and programmed manner with high tunability, versatility, and resolution to produce radically new materials and hybrid devices such as sensor fabrics, anatomically mimetic microfluidic modules, artificial tissues, smart prostheses, and bionic devices. In this critical Review, applications of small scale devices in 3D hybrid integration, biomicrofluidics, advanced prostheses, and bionic organs are discussed.
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Affiliation(s)
- Jayson V Pagaduan
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University, Baltimore, MD, 21287, USA
| | - Anil Bhatta
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University, Baltimore, MD, 21287, USA
| | - Lewis H Romer
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University, Baltimore, MD, 21287, USA
- Department of Cell Biology, Department of Biomedical Engineering, Department of Pediatrics and the Center for Cell Dynamics, Johns Hopkins University, Baltimore, MD, 21287, USA
| | - David H Gracias
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
- Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, 21218, USA
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Suresh PK. From a Chemical Matrix to Biologically/Biomechanically-Defined Matrices-Optimizing/Correlating Growth Rate and Differentiation Potential of Human Adipose-Derived Mesenchymal Stem Cells. IRANIAN JOURNAL OF BIOTECHNOLOGY 2018; 15:213-215. [PMID: 29845072 DOI: 10.15171/ijb.1606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 05/28/2017] [Accepted: 08/28/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Palamadai Krishnan Suresh
- Department of Bio-Medical Sciences, School of Biosciences & Technology, VIT University, Vellore, 632014. India
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Rose JC, Gehlen DB, Haraszti T, Köhler J, Licht CJ, De Laporte L. Biofunctionalized aligned microgels provide 3D cell guidance to mimic complex tissue matrices. Biomaterials 2018; 163:128-141. [PMID: 29459322 DOI: 10.1016/j.biomaterials.2018.02.001] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 02/01/2018] [Accepted: 02/02/2018] [Indexed: 12/27/2022]
Abstract
Natural healing is based on highly orchestrated processes, in which the extracellular matrix plays a key role. To resemble the native cell environment, we introduce an artificial extracellular matrix (aECM) with the capability to template hierarchical and anisotropic structures in situ, allowing a minimally-invasive application via injection. Synthetic, magnetically responsive, rod-shaped microgels are locally aligned and fixed by a biocompatible surrounding hydrogel, creating a hybrid anisotropic hydrogel (Anisogel), of which the physical, mechanical, and chemical properties can be tailored. The microgels are rendered cell-adhesive with GRGDS and incorporated either inside a cell-adhesive fibrin or bioinert poly(ethylene glycol) hydrogel to strongly interact with fibroblasts. GRGDS-modified microgels inside a fibrin-based Anisogel enhance fibroblast alignment and lead to a reduction in fibronectin production, indicating successful replacement of structural proteins. In addition, YAP-translocation to the nucleus increases with the concentration of microgels, indicating cellular sensing of the overall anisotropic mechanical properties of the Anisogel. For bioinert surrounding PEG hydrogels, GRGDS-microgels are required to support cell proliferation and fibronectin production. In contrast to fibroblasts, primary nerve growth is not significantly affected by the biomodification of the microgels. In conclusion, this approach opens new opportunities towards advanced and complex aECMs for tissue regeneration.
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Affiliation(s)
- Jonas C Rose
- DWI - Leibniz-Institute for Interactive Materials, Aachen, Germany
| | - David B Gehlen
- DWI - Leibniz-Institute for Interactive Materials, Aachen, Germany
| | - Tamás Haraszti
- DWI - Leibniz-Institute for Interactive Materials, Aachen, Germany
| | - Jens Köhler
- DWI - Leibniz-Institute for Interactive Materials, Aachen, Germany
| | | | - Laura De Laporte
- DWI - Leibniz-Institute for Interactive Materials, Aachen, Germany.
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Turker E, Arslan-Yildiz A. Recent Advances in Magnetic Levitation: A Biological Approach from Diagnostics to Tissue Engineering. ACS Biomater Sci Eng 2018; 4:787-799. [DOI: 10.1021/acsbiomaterials.7b00700] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Esra Turker
- Department of Bioengineering, Izmir Institute of Technology (IZTECH), 35430 Izmir, Turkey
| | - Ahu Arslan-Yildiz
- Department of Bioengineering, Izmir Institute of Technology (IZTECH), 35430 Izmir, Turkey
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Gupta V, Khan Y, Berkland CJ, Laurencin CT, Detamore MS. Microsphere-Based Scaffolds in Regenerative Engineering. Annu Rev Biomed Eng 2018. [PMID: 28633566 DOI: 10.1146/annurev-bioeng-071516-044712] [Citation(s) in RCA: 78] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Microspheres have long been used in drug delivery applications because of their controlled release capabilities. They have increasingly served as the fundamental building block for fabricating scaffolds for regenerative engineering because of their ability to provide a porous network, offer high-resolution control over spatial organization, and deliver growth factors/drugs and/or nanophase materials. Because they provide physicochemical gradients via spatiotemporal release of bioactive factors and nanophase ceramics, microspheres are a desirable tool for engineering complex tissues and biological interfaces. In this review we describe various methods for microsphere fabrication and sintering, and elucidate how these methods influence both micro- and macroscopic scaffold properties, with a special focus on the nature of sintering. Furthermore, we review key applications of microsphere-based scaffolds in regenerating various tissues. We hope to inspire researchers to join a growing community of investigators using microspheres as tissue engineering scaffolds so that their full potential in regenerative engineering may be realized.
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Affiliation(s)
- Vineet Gupta
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66045;
| | - Yusuf Khan
- Department of Orthopaedic Surgery, University of Connecticut Health Campus, Farmington, Connecticut 06030; , .,Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269.,Institute for Regenerative Engineering, University of Connecticut Health Campus, Farmington, Connecticut 06030
| | - Cory J Berkland
- Department of Pharmaceutical Chemistry, University of Kansas, Lawrence, Kansas 66045; .,Department of Chemical and Petroleum Engineering, University of Kansas, Lawrence, Kansas 66045;
| | - Cato T Laurencin
- Department of Orthopaedic Surgery, University of Connecticut Health Campus, Farmington, Connecticut 06030; , .,Department of Materials Science and Engineering, University of Connecticut, Storrs, Connecticut 06269.,Institute for Regenerative Engineering, University of Connecticut Health Campus, Farmington, Connecticut 06030
| | - Michael S Detamore
- Stephenson School of Biomedical Engineering, University of Oklahoma, Norman, Oklahoma 73019;
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Sewell-Loftin MK, Bayer SVH, Crist E, Hughes T, Joison SM, Longmore GD, George SC. Cancer-associated fibroblasts support vascular growth through mechanical force. Sci Rep 2017; 7:12574. [PMID: 28974764 PMCID: PMC5626692 DOI: 10.1038/s41598-017-13006-x] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Accepted: 09/14/2017] [Indexed: 01/24/2023] Open
Abstract
The role of cancer-associated fibroblasts (CAFs) as regulators of tumor progression, specifically vascular growth, has only recently been described. CAFs are thought to be more mechanically active but how this trait may alter the tumor microenvironment is poorly understood. We hypothesized that enhanced mechanical activity of CAFs, as regulated by the Rho/ROCK pathway, contributes to increased blood vessel growth. Using a 3D in vitro tissue model of vasculogenesis, we observed increased vascularization in the presence of breast cancer CAFs compared to normal breast fibroblasts. Further studies indicated this phenomenon was not simply a result of enhanced soluble signaling factors, including vascular endothelial growth factor (VEGF), and that CAFs generated significantly larger deformations in 3D gels compared to normal fibroblasts. Inhibition of the mechanotransductive pathways abrogated the ability of CAFs to deform the matrix and suppressed vascularization. Finally, utilizing magnetic microbeads to mechanically stimulate mechanically-inhibited CAFs showed partial rescue of vascularization. Our studies demonstrate enhanced mechanical activity of CAFs may play a crucial and previously unappreciated role in the formation of tumor-associated vasculature which could possibly offer potential novel targets in future anti-cancer therapies.
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Affiliation(s)
- Mary Kathryn Sewell-Loftin
- Departments of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA.,ICCE Institute at Washington University, Washington University in St. Louis, St. Louis, MO, 63110, USA
| | - Samantha Van Hove Bayer
- Departments of Cell Biology and Physiology, Washington University in St. Louis, St. Louis, MO, 63130, USA.,ICCE Institute at Washington University, Washington University in St. Louis, St. Louis, MO, 63110, USA
| | - Elizabeth Crist
- Departments of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Taylor Hughes
- Departments of Biomedical Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Sofia M Joison
- Departments of Computer Science and Engineering, Washington University in St. Louis, St. Louis, MO, 63130, USA
| | - Gregory D Longmore
- Departments of Cell Biology and Physiology, Washington University in St. Louis, St. Louis, MO, 63130, USA.,Department of Medicine, Oncology Division, Washington University in St. Louis, St. Louis, MO, 63110, USA.,ICCE Institute at Washington University, Washington University in St. Louis, St. Louis, MO, 63110, USA
| | - Steven C George
- Department of Biomedical Engineering, University of California, Davis, CA, 95616, USA.
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Qiu Y, Tong S, Zhang L, Sakurai Y, Myers DR, Hong L, Lam WA, Bao G. Magnetic forces enable controlled drug delivery by disrupting endothelial cell-cell junctions. Nat Commun 2017; 8:15594. [PMID: 28593939 PMCID: PMC5472756 DOI: 10.1038/ncomms15594] [Citation(s) in RCA: 100] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2016] [Accepted: 04/10/2017] [Indexed: 12/17/2022] Open
Abstract
The vascular endothelium presents a major transport barrier to drug delivery by only allowing selective extravasation of solutes and small molecules. Therefore, enhancing drug transport across the endothelial barrier has to rely on leaky vessels arising from disease states such as pathological angiogenesis and inflammatory response. Here we show that the permeability of vascular endothelium can be increased using an external magnetic field to temporarily disrupt endothelial adherens junctions through internalized iron oxide nanoparticles, activating the paracellular transport pathway and facilitating the local extravasation of circulating substances. This approach provides a physically controlled drug delivery method harnessing the biology of endothelial adherens junction and opens a new avenue for drug delivery in a broad range of biomedical research and therapeutic applications. The transportation of large molecules through the vascular endothelium presents a major challenge for in vivo drug delivery. Here, the authors demonstrate the potential of using external magnetic fields and magnetic nanoparticles to enhance the local extravasation of circulating large molecules.
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Affiliation(s)
- Yongzhi Qiu
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA.,Division of Pediatric Hematology/Oncology, Department of Pediatrics, Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, Georgia 30332, USA.,Winship Cancer Institute of Emory University, Atlanta, Georgia 30332, USA
| | - Sheng Tong
- Department of Bioengineering, Rice University, Houston, Texas 77005, USA
| | - Linlin Zhang
- Department of Bioengineering, Rice University, Houston, Texas 77005, USA
| | - Yumiko Sakurai
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA.,Division of Pediatric Hematology/Oncology, Department of Pediatrics, Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, Georgia 30332, USA.,Winship Cancer Institute of Emory University, Atlanta, Georgia 30332, USA
| | - David R Myers
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA.,Division of Pediatric Hematology/Oncology, Department of Pediatrics, Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, Georgia 30332, USA.,Winship Cancer Institute of Emory University, Atlanta, Georgia 30332, USA
| | - Lin Hong
- Department of Bioengineering, Rice University, Houston, Texas 77005, USA
| | - Wilbur A Lam
- Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, Georgia 30332, USA.,Division of Pediatric Hematology/Oncology, Department of Pediatrics, Aflac Cancer and Blood Disorders Center of Children's Healthcare of Atlanta, Emory University School of Medicine, Atlanta, Georgia 30332, USA.,Winship Cancer Institute of Emory University, Atlanta, Georgia 30332, USA
| | - Gang Bao
- Department of Bioengineering, Rice University, Houston, Texas 77005, USA
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18
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Stohanzlova P, Kolar R. Tissue perfusion modelling in optical coherence tomography. Biomed Eng Online 2017; 16:27. [PMID: 28178998 PMCID: PMC5299764 DOI: 10.1186/s12938-017-0320-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 01/31/2017] [Indexed: 11/30/2022] Open
Abstract
Background Optical coherence tomography (OCT) is a well established imaging technique with different applications in preclinical research and clinical practice. The main potential for its application lies in the possibility of noninvasively performing “optical biopsy”. Nevertheless, functional OCT imaging is also developing, in which perfusion imaging is an important approach in tissue function study. In spite of its great potential in preclinical research, advanced perfusion imaging using OCT has not been studied. Perfusion analysis is based on administration of a contrast agent (nanoparticles in the case of OCT) into the bloodstream, where during time it specifically changes the image contrast. Through analysing the concentration-intensity curves we are then able to find out further information about the examined tissue. Methods We have designed and manufactured a tissue mimicking phantom that provides the possibility of measuring dilution curves in OCT sequence with flow rates 200, 500, 1000 and 2000 μL/min. The methodology comprised of using bolus of 50 μL of gold nanorods as a contrast agent (with flow rate 5000 μL/min) and continuous imaging by an OCT system. After data acquisition, dilution curves were extracted from OCT intensity images and were subjected to a deconvolution method using an input–output system description. The aim of this was to obtain impulse response characteristics for our model phantom within the tissue mimicking environment. Four mathematical tissue models were used and compared: exponential, gamma, lagged and LDRW. Results We have shown that every model has a linearly dependent parameter on flow (\documentclass[12pt]{minimal}
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\begin{document}$$R^2$$\end{document}R2 values from 0.4914 to 0.9996). We have also shown that using different models can lead to a better understanding of the examined model or tissue. The lagged model surpassed other models in terms of the minimisation criterion and \documentclass[12pt]{minimal}
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\begin{document}$$R^2$$\end{document}R2 value. Conclusions We used a tissue mimicking phantom in our study and showed that OCT can be used for advanced perfusion analysis using mathematical model and deconvolution approach. The lagged model with three parameters is the most appropriate model. Nevertheless, further research have to be performed, particularly with real tissue. Electronic supplementary material The online version of this article (doi:10.1186/s12938-017-0320-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Petra Stohanzlova
- Department of Biomedical Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 12, 61600, Brno, Czech Republic.
| | - Radim Kolar
- Department of Biomedical Engineering, Faculty of Electrical Engineering and Communication, Brno University of Technology, Technicka 12, 61600, Brno, Czech Republic
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19
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Yin C, Zhang Y, Cai Q, Li B, Yang H, Wang H, Qi H, Zhou Y, Meng W. Effects of the micro-nano surface topography of titanium alloy on the biological responses of osteoblast. J Biomed Mater Res A 2016; 105:757-769. [PMID: 27756111 DOI: 10.1002/jbm.a.35941] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 10/13/2016] [Accepted: 10/17/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Chengcheng Yin
- Department of Dental Implantology, School and Hospital of Stomatology; Jilin University, Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling; Changchun 130021 People's Republic of China
| | - Yanjing Zhang
- Department of Dental Implantology, School and Hospital of Stomatology; Jilin University, Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling; Changchun 130021 People's Republic of China
| | - Qing Cai
- Department of Dental Implantology, School and Hospital of Stomatology; Jilin University, Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling; Changchun 130021 People's Republic of China
| | - Baosheng Li
- Department of Dental Implantology, School and Hospital of Stomatology; Jilin University, Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling; Changchun 130021 People's Republic of China
| | - Hua Yang
- Department of Dental Implantology, School and Hospital of Stomatology; Jilin University, Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling; Changchun 130021 People's Republic of China
| | - Heling Wang
- Department of Dental Implantology, School and Hospital of Stomatology; Jilin University, Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling; Changchun 130021 People's Republic of China
| | - Hua Qi
- Department of Dental Implantology, School and Hospital of Stomatology; Jilin University, Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling; Changchun 130021 People's Republic of China
| | - Yanmin Zhou
- Department of Dental Implantology, School and Hospital of Stomatology; Jilin University, Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling; Changchun 130021 People's Republic of China
| | - Weiyan Meng
- Department of Dental Implantology, School and Hospital of Stomatology; Jilin University, Jilin Provincial Key Laboratory of Tooth Development and Bone Remodeling; Changchun 130021 People's Republic of China
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20
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Lu Q, Tang Q, Xiong Y, Qing G, Sun T. Protein/Peptide Aggregation and Amyloidosis on Biointerfaces. MATERIALS (BASEL, SWITZERLAND) 2016; 9:E740. [PMID: 28773858 PMCID: PMC5457079 DOI: 10.3390/ma9090740] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/10/2016] [Revised: 08/12/2016] [Accepted: 08/25/2016] [Indexed: 12/27/2022]
Abstract
Recently, studies of protein/peptide aggregation, particularly the amyloidosis, have attracted considerable attention in discussions of the pathological mechanisms of most neurodegenerative diseases. The protein/peptide aggregation processes often occur at the membrane-cytochylema interface in vivo and behave differently from those occurring in bulk solution, which raises great interest to investigate how the interfacial properties of artificial biomaterials impact on protein aggregation. From the perspective of bionics, current progress in this field has been obtained mainly from four aspects: (1) hydrophobic-hydrophilic interfaces; (2) charged surface; (3) chiral surface; and (4) biomolecule-related interfaces. The specific physical and chemical environment provided by these interfaces is reported to strongly affect the adsorption of proteins, transition of protein conformation, and diffusion of proteins on the biointerface, all of which are ultimately related to protein assembly. Meanwhile, these compelling results of in vitro experiments can greatly promote the development of early diagnostics and therapeutics for the relevant neurodegenerative diseases. This paper presents a brief review of these appealing studies, and particular interests are placed on weak interactions (i.e., hydrogen bonding and stereoselective interactions) that are also non-negligible in driving amyloid aggregation at the interfaces. Moreover, this paper also proposes the future perspectives, including the great opportunities and challenges in this field as well.
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Affiliation(s)
- Qi Lu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
| | - Qiuhan Tang
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
| | - Yuting Xiong
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
| | - Guangyan Qing
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
| | - Taolei Sun
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
- School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070, China.
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21
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Gao Y, Lim J, Teoh SH, Xu C. Emerging translational research on magnetic nanoparticles for regenerative medicine. Chem Soc Rev 2016; 44:6306-29. [PMID: 26505058 DOI: 10.1039/c4cs00322e] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Regenerative medicine, which replaces or regenerates human cells, tissues or organs, to restore or establish normal function, is one of the fastest-evolving interdisciplinary fields in healthcare. Over 200 regenerative medicine products, including cell-based therapies, tissue-engineered biomaterials, scaffolds and implantable devices, have been used in clinical development for diseases such as diabetes and inflammatory and immune diseases. To facilitate the translation of regenerative medicine from research to clinic, nanotechnology, especially magnetic nanoparticles have attracted extensive attention due to their unique optical, electrical, and magnetic properties and specific dimensions. In this review paper, we intend to summarize current advances, challenges, and future opportunities of magnetic nanoparticles for regenerative medicine.
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22
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23
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Thomas D, Gaspar D, Sorushanova A, Milcovich G, Spanoudes K, Mullen AM, O'Brien T, Pandit A, Zeugolis DI. Scaffold and scaffold-free self-assembled systems in regenerative medicine. Biotechnol Bioeng 2015; 113:1155-63. [PMID: 26498484 DOI: 10.1002/bit.25869] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Revised: 10/19/2015] [Accepted: 10/23/2015] [Indexed: 01/09/2023]
Abstract
Self-assembly in tissue engineering refers to the spontaneous chemical or biological association of components to form a distinct functional construct, reminiscent of native tissue. Such self-assembled systems have been widely used to develop platforms for the delivery of therapeutic and/or bioactive molecules and various cell populations. Tissue morphology and functional characteristics have been recapitulated in several self-assembled constructs, designed to incorporate stimuli responsiveness and controlled architecture through spatial confinement or field manipulation. In parallel, owing to substantial functional properties, scaffold-free cell-assembled devices have aided in the development of functional neotissues for various clinical targets. Herein, we discuss recent advancements and future aspirations in scaffold and scaffold-free self-assembled devices for regenerative medicine purposes. Biotechnol. Bioeng. 2016;113: 1155-1163. © 2015 Wiley Periodicals, Inc.
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Affiliation(s)
- Dilip Thomas
- Centre for Research in Medical Devices (CÚRAM), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland.,Regenerative Medicine Institute (REMEDI), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Diana Gaspar
- Centre for Research in Medical Devices (CÚRAM), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland.,Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Anna Sorushanova
- Centre for Research in Medical Devices (CÚRAM), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland.,Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Gesmi Milcovich
- Centre for Research in Medical Devices (CÚRAM), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Kyriakos Spanoudes
- Centre for Research in Medical Devices (CÚRAM), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland.,Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | | | - Timothy O'Brien
- Centre for Research in Medical Devices (CÚRAM), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland.,Regenerative Medicine Institute (REMEDI), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Abhay Pandit
- Centre for Research in Medical Devices (CÚRAM), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland
| | - Dimitrios I Zeugolis
- Centre for Research in Medical Devices (CÚRAM), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland. .,Regenerative, Modular & Developmental Engineering Laboratory (REMODEL), Biosciences Research Building, National University of Ireland Galway (NUI Galway), Galway, Ireland.
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24
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Horzum U, Ozdil B, Pesen-Okvur D. Differentiation of Normal and Cancer Cell Adhesion on Custom Designed Protein Nanopatterns. NANO LETTERS 2015; 15:5393-5403. [PMID: 26132305 DOI: 10.1021/acs.nanolett.5b01785] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Cell adhesion to the extracellular matrix is deregulated in metastasis. However, traditional surfaces used to study cell adhesion do not faithfully mimic the in vivo microenvironment. Electron beam lithography (EBL) is able to generate customized protein nanopatterns. Here, we used an EBL-based green lithography approach to fabricate homogeneous and gradient, single (fibronectin, K-casein) and double (fibronectin, laminin) active component protein nanopatterns with micrometer scale spacing to investigate differences in adhesion of breast cancer cells (BCC) and normal mammary epithelial cells (NMEC). Our results showed that as expected, in contrast to NMEC, BCC were plastic: they tolerated nonadhesion promoting regions, adapted to flow and exploited gradients better. In addition, the number of focal adhesions but not their area appeared to be the dominant parameter for regulation of cell adhesion. Our findings also demonstrated that custom designed protein nanopatterns, which can properly mimic the in vivo microenvironment, enable realistic distinction of normal and cancerous cell adhesion.
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Affiliation(s)
- Utku Horzum
- Department of Molecular Biology and Genetics, Izmir Institute of Technology, 35430 Urla/Izmir, Turkey
| | - Berrin Ozdil
- Department of Molecular Biology and Genetics, Izmir Institute of Technology, 35430 Urla/Izmir, Turkey
| | - Devrim Pesen-Okvur
- Department of Molecular Biology and Genetics, Izmir Institute of Technology, 35430 Urla/Izmir, Turkey
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25
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Zhou W, Feng Y, Yang J, Fan J, Lv J, Zhang L, Guo J, Ren X, Zhang W. Electrospun scaffolds of silk fibroin and poly(lactide-co-glycolide) for endothelial cell growth. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:5386. [PMID: 25601671 DOI: 10.1007/s10856-015-5386-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 09/12/2014] [Indexed: 06/04/2023]
Abstract
Electrospun scaffolds of silk fibroin (SF) and poly(lactide-co-glycolide) (PLGA) were prepared to mimic the morphology and chemistry of the extracellular matrix. The SF/PLGA scaffolds were treated with ethanol to improve their usability. After ethanol treatment the scaffolds exhibited a smooth surface and uniform fibers. SF transformed from random coil conformation to β-sheet structure after ethanol treatment, so that the SF/PLGA scaffolds showed low hydrophilicity and dissolving rate in water. The mechanical properties and the hydrophilicity of the blended fibrous scaffolds were affected by the weight ratio of SF and PLGA. During degradation of ethanol-treated SF/PLGA scaffolds in vitro, the fibers became thin along with the degradation time. Human umbilical vein endothelial cells (HUVECs) were seeded onto the ethanol-treated nanofibrous scaffolds for cell viability, attachment and morphogenesis studies. These SF/PLGA scaffolds could enhance the viability, spreading and attachment of HUVECs. Based on these results, these ethanol-treated scaffolds are proposed to be a good candidate for endothelial cell growth.
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Affiliation(s)
- Wei Zhou
- School of Chemical Engineering and Technology, Tianjin University, Weijin Road 92, Nankai District, Tianjin, 300072, China
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26
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Bumpers HL, Janagama DG, Manne U, Basson MD, Katkoori V. Nanomagnetic levitation three-dimensional cultures of breast and colorectal cancers. J Surg Res 2014; 194:319-326. [PMID: 25617973 DOI: 10.1016/j.jss.2014.12.036] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 11/16/2014] [Accepted: 12/17/2014] [Indexed: 11/16/2022]
Abstract
BACKGROUND Innovative technologies for drug discovery and development, cancer models, stem cell research, tissue engineering, and drug testing in various cell-based platforms require an application similar to the in vivo system. MATERIALS AND METHODS We developed for the first time nanomagnetically levitated three-dimensional (3-D) cultures of breast cancer (BC) and colorectal cancer (CRC) cells using carbon-encapsulated cobalt magnetic nanoparticles. BC and CRC xenografts grown in severe combined immunodeficient (SCID) mice were evaluated for N-cadherin and epidermal growth factor receptor expressions. These phenotypes were compared with two-dimensional and 3-D cultures grown in a gel matrix. RESULTS The BC and CRC cells grown by magnetic levitation formed microtissues. The levitated cultures had high viability and were maintained in culture for long periods of time. It has been observed that N-cadherin and epidermal growth factor receptor activities were highly expressed in the levitated 3-D tumor spheres and xenografts of CRC and BC cells. CONCLUSIONS Nanomagnetically levitated 3-D cultures tend to form stable microtissues of BC and CRC and maybe more feasible for a range of applications in drug discovery or regenerative medicine.
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Affiliation(s)
- Harvey L Bumpers
- Department of Surgery, Michigan State University-CHM, Lansing, Michigan.
| | | | - Upender Manne
- Department of Pathology, University of Alabama at Birmingham School of Medicine, Birmingham, Alabama
| | - Marc D Basson
- Department of Surgery, Michigan State University-CHM, Lansing, Michigan
| | - Venkat Katkoori
- Department of Surgery, Michigan State University-CHM, Lansing, Michigan
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27
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Brown AC, Barker TH. Fibrin-based biomaterials: modulation of macroscopic properties through rational design at the molecular level. Acta Biomater 2014; 10:1502-14. [PMID: 24056097 DOI: 10.1016/j.actbio.2013.09.008] [Citation(s) in RCA: 171] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 08/14/2013] [Accepted: 09/06/2013] [Indexed: 01/06/2023]
Abstract
Fibrinogen is one of the primary components of the coagulation cascade and rapidly forms an insoluble matrix following tissue injury. In addition to its important role in hemostasis, fibrin acts as a scaffold for tissue repair and provides important cues for directing cell phenotype following injury. Because of these properties and the ease of polymerization of the material, fibrin has been widely utilized as a biomaterial for over a century. Modifying the macroscopic properties of fibrin, such as elasticity and porosity, has been somewhat elusive until recently, yet with a molecular-level rational design approach it can now be somewhat easily modified through alterations of molecular interactions key to the protein's polymerization process. This review outlines the biochemistry of fibrin and discusses methods for modification of molecular interactions and their application to fibrin based biomaterials.
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28
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Hu B, El Haj AJ, Dobson J. Receptor-targeted, magneto-mechanical stimulation of osteogenic differentiation of human bone marrow-derived mesenchymal stem cells. Int J Mol Sci 2013; 14:19276-93. [PMID: 24065106 PMCID: PMC3794833 DOI: 10.3390/ijms140919276] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2013] [Revised: 09/02/2013] [Accepted: 09/05/2013] [Indexed: 11/16/2022] Open
Abstract
Mechanical cues are employed to promote stem cell differentiation and functional tissue formation in tissue engineering and regenerative medicine. We have developed a Magnetic Force Bioreactor (MFB) that delivers highly targeted local forces to cells at a pico-newton level, utilizing magnetic micro- and nano-particles to target cell surface receptors. In this study, we investigated the effects of magnetically targeting and actuating specific two mechanical-sensitive cell membrane receptors-platelet-derived growth factor receptor α (PDGFRα) and integrin ανβ3. It was found that a higher mineral-to-matrix ratio was obtained after three weeks of magneto-mechanical stimulation coupled with osteogenic medium culture by initially targeting PDGFRα compared with targeting integrin ανβ3 and non-treated controls. Moreover, different initiation sites caused a differentiated response profile when using a 2-day-lagged magneto-mechanical stimulation over culture periods of 7 and 12 days). However, both resulted in statistically higher osteogenic marker genes expression compared with immediate magneto-mechanical stimulation. These results provide insights into important parameters for designing appropriate protocols for ex vivo induced bone formation via magneto-mechanical actuation.
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Affiliation(s)
- Bin Hu
- Institute of Science and Technology in Medicine, Guy Hilton Research Center, Keele University, Thornburrow Drive, Hartshill, Stoke on Trent, ST4 7QB, UK; E-Mails: (B.H.); (A.J.E.H.)
| | - Alicia J El Haj
- Institute of Science and Technology in Medicine, Guy Hilton Research Center, Keele University, Thornburrow Drive, Hartshill, Stoke on Trent, ST4 7QB, UK; E-Mails: (B.H.); (A.J.E.H.)
| | - Jon Dobson
- J. Crayton Puritt Family Department of Biomedical Engineering, Department of Materials Science and Engineering, Institute of Cell Engineering and Regenerative Medicine (ICERM), University of Florida, Gainesville, FL 32611, USA
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +1-352-273-9222; Fax: +1-352-273-9221
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29
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Wang Z, Zhang X, Yang J, Yang Z, Wan X, Hu N, Zheng X. Construction of microscale structures in enclosed microfluidic networks by using a magnetic beads based method. Anal Chim Acta 2013; 792:66-71. [DOI: 10.1016/j.aca.2013.07.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 06/20/2013] [Accepted: 07/04/2013] [Indexed: 11/25/2022]
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Tasoglu S, Gurkan UA, Wang S, Demirci U. Manipulating biological agents and cells in micro-scale volumes for applications in medicine. Chem Soc Rev 2013; 42:5788-808. [PMID: 23575660 PMCID: PMC3865707 DOI: 10.1039/c3cs60042d] [Citation(s) in RCA: 86] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Recent technological advances provide new tools to manipulate cells and biological agents in micro/nano-liter volumes. With precise control over small volumes, the cell microenvironment and other biological agents can be bioengineered; interactions between cells and external stimuli can be monitored; and the fundamental mechanisms such as cancer metastasis and stem cell differentiation can be elucidated. Technological advances based on the principles of electrical, magnetic, chemical, optical, acoustic, and mechanical forces lead to novel applications in point-of-care diagnostics, regenerative medicine, in vitro drug testing, cryopreservation, and cell isolation/purification. In this review, we first focus on the underlying mechanisms of emerging examples for cell manipulation in small volumes targeting applications such as tissue engineering. Then, we illustrate how these mechanisms impact the aforementioned biomedical applications, discuss the associated challenges, and provide perspectives for further development.
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Affiliation(s)
- Savas Tasoglu
- Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering and Division of Infectious Diseases, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Umut Atakan Gurkan
- Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering and Division of Infectious Diseases, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - ShuQi Wang
- Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering and Division of Infectious Diseases, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Utkan Demirci
- Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering and Division of Infectious Diseases, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
- Harvard-MIT Health Sciences and Technology, Cambridge, MA, USA
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31
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Mezzenga R, Fischer P. The self-assembly, aggregation and phase transitions of food protein systems in one, two and three dimensions. REPORTS ON PROGRESS IN PHYSICS. PHYSICAL SOCIETY (GREAT BRITAIN) 2013; 76:046601. [PMID: 23455715 DOI: 10.1088/0034-4885/76/4/046601] [Citation(s) in RCA: 240] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The aggregation of proteins is of fundamental relevance in a number of daily phenomena, as important and diverse as blood coagulation, medical diseases, or cooking an egg in the kitchen. Colloidal food systems, in particular, are examples that have great significance for protein aggregation, not only for their importance and implications, which touches on everyday life, but also because they allow the limits of the colloidal science analogy to be tested in a much broader window of conditions, such as pH, ionic strength, concentration and temperature. Thus, studying the aggregation and self-assembly of proteins in foods challenges our understanding of these complex systems from both the molecular and statistical physics perspectives. Last but not least, food offers a unique playground to study the aggregation of proteins in three, two and one dimensions, that is to say, in the bulk, at air/water and oil/water interfaces and in protein fibrillation phenomena. In this review we will tackle this very ambitious task in order to discuss the current understanding of protein aggregation in the framework of foods, which is possibly one of the broadest contexts, yet is of tremendous daily relevance.
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Affiliation(s)
- Raffaele Mezzenga
- ETH Zurich, Food and Soft Materials Science, Department of Health Science and Technology, Institute of Food, Nutrition and Health, Schmelzbergstrasse 9, LFO E23, 8092 Zürich, Switzerland.
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32
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Tasoglu S, Kavaz D, Gurkan UA, Guven S, Chen P, Zheng R, Demirci U. Paramagnetic levitational assembly of hydrogels. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2013; 25:1137-43, 1081. [PMID: 23288557 PMCID: PMC3823061 DOI: 10.1002/adma.201200285] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 10/10/2012] [Indexed: 04/14/2023]
Affiliation(s)
- Savas Tasoglu
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA, Harvard-MIT Health Sciences and Technology, Cambridge, MA, 02139, USA
| | - Doga Kavaz
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA, Harvard-MIT Health Sciences and Technology, Cambridge, MA, 02139, USA
| | - Umut Atakan Gurkan
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA, Harvard-MIT Health Sciences and Technology, Cambridge, MA, 02139, USA
| | - Sinan Guven
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA, Harvard-MIT Health Sciences and Technology, Cambridge, MA, 02139, USA
| | - Pu Chen
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA, Harvard-MIT Health Sciences and Technology, Cambridge, MA, 02139, USA
| | - Reila Zheng
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA, Harvard-MIT Health Sciences and Technology, Cambridge, MA, 02139, USA
| | - Utkan Demirci
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory, Division of Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA, Harvard-MIT Health Sciences and Technology, Cambridge, MA, 02139, USA
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Sensenig R, Sapir Y, MacDonald C, Cohen S, Polyak B. Magnetic nanoparticle-based approaches to locally target therapy and enhance tissue regeneration in vivo. Nanomedicine (Lond) 2013; 7:1425-42. [PMID: 22994959 DOI: 10.2217/nnm.12.109] [Citation(s) in RCA: 134] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Magnetic-based systems utilizing superparamagnetic nanoparticles and a magnetic field gradient to exert a force on these particles have been used in a wide range of biomedical applications. This review is focused on drug targeting applications that require penetration of a cellular barrier as well as strategies to improve the efficacy of targeting in these biomedical applications. Another focus of this review is regenerative applications utilizing tissue engineered scaffolds prepared with the aid of magnetic particles, the use of remote actuation for release of bioactive molecules and magneto-mechanical cell stimulation, cell seeding and cell patterning.
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Affiliation(s)
- Richard Sensenig
- Department of Surgery, Drexel University College of Medicine, PA 19102, USA
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Gupta MK, Kulkarni DD, Geryak R, Naik S, Tsukruk VV. A robust and facile approach to assembling mobile and highly-open unfrustrated triangular lattices from ferromagnetic nanorods. NANO LETTERS 2013; 13:36-42. [PMID: 23237519 DOI: 10.1021/nl303268s] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
A simple and widely applicable approach to assemble long-range two-dimensional mobile arrays of functionalized nickel nanorods with tunable and "highly open" lattice structures is presented. The magnetic assembly of uniformly oriented nanorods in triangular lattices was achieved by a phase separation of the surface confined yet mobile vertical nanorods driven by a gradient magnetic field. In contrast to known approaches, the unfrustrated lattices can be further locked in place allowing for the removal of the applied magnetic field and processing without disrupting the initial order with different symmetries precisely assembled and locked in their position on the same substrate. We suggest that the tunable assemblies of magnetic nanorods provide a versatile platform for downstream handling of open lattice arrays for eventual device integration.
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Affiliation(s)
- Maneesh K Gupta
- School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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Qin X, Xie W, Tian S, Cai J, Yuan H, Yu Z, Butterfoss GL, Khuong AC, Gross RA. Enzyme-triggered hydrogelation via self-assembly of alternating peptides. Chem Commun (Camb) 2013; 49:4839-41. [DOI: 10.1039/c3cc41794h] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
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37
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Verseijden F, Posthumus-van Sluijs SJ, van Neck JW, Hofer SOP, Hovius SER, van Osch GJVM. Comparing scaffold-free and fibrin-based adipose-derived stromal cell constructs for adipose tissue engineering: an in vitro and in vivo study. Cell Transplant 2012; 21:2283-97. [PMID: 22840523 DOI: 10.3727/096368912x653129] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Success of adipose tissue engineering for soft tissue repair has been limited by insufficient adipogenic differentiation, an unfavorable host response, and insufficient vascularization. In this study, we examined how scaffold-free spheroid and fibrin-based environments impact these parameters in human adipose-derived stromal cell (ASC)-based adipose constructs. ASCs were differentiated in spheroids or fibrin-based constructs. After 7 days, conditioned medium was collected and spheroids/fibrin-based constructs were either harvested or implanted subcutaneously in athymic mice. Following 7 days of implantation, the number of blood vessels in fibrin-based constructs was significantly higher than in spheroids (93±45 vs. 23±11 vessels/mm(2)), and the inflammatory response to fibrin-based constructs was less severe. The reasons for these results were investigated further in vitro. We found that ASCs in fibrin-based constructs secreted significantly higher levels of the angiogenic factors VEGF and HGF and lower levels of the inflammatory cytokine IL-8. Furthermore, ASCs in fibrin-based constructs secreted significantly higher levels of leptin and showed a 2.5-fold upregulation of the adipogenic transcription factor PPARG and a fourfold to fivefold upregulation of the adipocyte-specific markers FABP4, perilipin, and leptin. These results indicate that fibrin-based ASC constructs are potentially more suitable for ASC-based adipose tissue reconstruction than scaffold-free spheroids.
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Affiliation(s)
- Femke Verseijden
- Department of Plastic and Reconstructive Surgery, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.
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38
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Pal US, Mohammad S, Singh RK, Das S, Singh N, Singh M. Platelet-rich growth factor in oral and maxillofacial surgery. Natl J Maxillofac Surg 2012; 3:118-23. [PMID: 23833484 PMCID: PMC3700143 DOI: 10.4103/0975-5950.111340] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Platelet-rich growth factor is an innovative regenerative therapy used to promote hard and soft tissue healing. It involves the application of autologous platelet-leukocyte-rich plasma containing growth factors and thrombin directly to the site of treatment. It is the intrinsic growth factors released by activated platelets which are concentrated in a topical gel formula. Clinically, it is an affordable treatment with potentially broad spectrum of applications in maxillofacial surgery especially in the treatment of complex or refractory wounds. The present article reviews its various applications not only in the specialization of oral and maxillofacial surgery but also in regenerative medicine.
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Affiliation(s)
- Uma Shanker Pal
- Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Shadab Mohammad
- Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Rakesh K. Singh
- Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Somdipto Das
- Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Nimisha Singh
- Department of Oral and Maxillofacial Surgery, Faculty of Dental Sciences, King George's Medical University, Lucknow, Uttar Pradesh, India
| | - Mayank Singh
- Department of Prosthodontics, King George's Medical University, Lucknow, Uttar Pradesh, India
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39
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Henderson J, Shi S, Cakmaktepe S, Crawford TM. Pattern transfer nanomanufacturing using magnetic recording for programmed nanoparticle assembly. NANOTECHNOLOGY 2012; 23:185304. [PMID: 22498791 DOI: 10.1088/0957-4484/23/18/185304] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We report a novel nanomanufacturing technique that incorporates patterned arrays built entirely from Fe₃O₄ nanoparticles into a flexible and transparent polymer film. First, the nanoparticles are patterned using the enormous magnetic field gradients at the surface of commercial disk drive media, and then the resulting architecture is transferred to the surface of a polymer film by spin-coating and peeling. Since the particles are immobilized by the field gradients during the spin-coating process, the patterned array is preserved after peeling. To demonstrate the potential of this technology, we fabricate a 5 mm diameter all-nanoparticle diffraction grating capable of producing a white-light optical spectrum. We also demonstrate several extensions to this technology, where, by adding an external magnetic field during assembly, we create both periodic variations in topography, as well as a nanocomposite with two vertically and horizontally separated nanoparticle layers. As this technique leverages the nanometer resolution inherent in current magnetic recording technology, strong potential exists for low-cost nanomanufacturing of optical and electronic devices from a variety of nanomaterials with ∼10 nm resolution.
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Affiliation(s)
- J Henderson
- Department of Physics and Astronomy, University of South Carolina, 712 Main Street, Columbia, SC 29208, USA
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Gurkan UA, Tasoglu S, Kavaz D, Demirel MC, Demirci U. Emerging technologies for assembly of microscale hydrogels. Adv Healthc Mater 2012; 1:149-158. [PMID: 23184717 PMCID: PMC3774531 DOI: 10.1002/adhm.201200011] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Revised: 02/08/2012] [Indexed: 01/30/2023]
Abstract
Assembly of cell encapsulating building blocks (i.e., microscale hydrogels) has significant applications in areas including regenerative medicine, tissue engineering, and cell-based in vitro assays for pharmaceutical research and drug discovery. Inspired by the repeating functional units observed in native tissues and biological systems (e.g., the lobule in liver, the nephron in kidney), assembly technologies aim to generate complex tissue structures by organizing microscale building blocks. Novel assembly technologies enable fabrication of engineered tissue constructs with controlled properties including tunable microarchitectural and predefined compositional features. Recent advances in micro- and nano-scale technologies have enabled engineering of microgel based three dimensional (3D) constructs. There is a need for high-throughput and scalable methods to assemble microscale units with a complex 3D micro-architecture. Emerging assembly methods include novel technologies based on microfluidics, acoustic and magnetic fields, nanotextured surfaces, and surface tension. In this review, we survey emerging microscale hydrogel assembly methods offering rapid, scalable microgel assembly in 3D, and provide future perspectives and discuss potential applications.
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Affiliation(s)
- Umut Atakan Gurkan
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory Center for Bioengineering Brigham and Women's Hospital Harvard Medical School Boston, MA 02115, USA
| | - Savas Tasoglu
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory Center for Bioengineering Brigham and Women's Hospital Harvard Medical School Boston, MA 02115, USA
| | - Doga Kavaz
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory Center for Bioengineering Brigham and Women's Hospital Harvard Medical School Boston, MA 02115, USA
| | - Melik C Demirel
- Materials Research Institute Pennsylvania State University University Park, PA 16802, USA
| | - Utkan Demirci
- Bio-Acoustic MEMS in Medicine (BAMM) Laboratory Center for Bioengineering Brigham and Women's Hospital Harvard Medical School Boston, MA 02115, USA
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41
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Skaat H, Ziv-Polat O, Shahar A, Last D, Mardor Y, Margel S. Magnetic scaffolds enriched with bioactive nanoparticles for tissue engineering. Adv Healthc Mater 2012. [PMID: 23184719 DOI: 10.1002/adhm.201100056] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Novel magnetic fibrin hydrogel scaffolds for cell implantation and tissue engineering are reported. The magnetic scaffolds are produced by the interaction between thrombin-conjugated maghemite nanoparticles of narrow size distribution and fibrinogen. These scaffolds, enriched with growth factor conjugated fluorescent maghemite nanoparticles, provide a supporting 3D environment for massive proliferation of various cell types, and can be successfully visualized by MRI.
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Affiliation(s)
- Hadas Skaat
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan 52900, Israel.
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42
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Xu F, Wu CAM, Rengarajan V, Finley TD, Keles HO, Sung Y, Li B, Gurkan UA, Demirci U. Three-dimensional magnetic assembly of microscale hydrogels. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:4254-60. [PMID: 21830240 PMCID: PMC3534971 DOI: 10.1002/adma.201101962] [Citation(s) in RCA: 122] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2011] [Revised: 06/13/2011] [Indexed: 05/20/2023]
Abstract
Directed assembly of nano and microscale particles is of great interest and has widespread applications in various fields including electronics, nanomaterials and tissue engineering. Bottom-up tissue engineering is motivated by the occurrence of repeating functional units in vivo. The bottom-up approach requires novel techniques to assemble engineered functional units as building blocks at a high speed with spatial control over three-dimensional (3D) micro-architecture. Here, we report a magnetic assembler that utilizes nanoparticles and microscale hydrogels as building blocks to create 3D complex multi-layer constructs via external magnetic fields using different concentrations of magnetic nanoparticles. This approach holds potential for 3D assembly processes that could be utilized in various tissue engineering and regenerative medicine applications.
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Affiliation(s)
- Feng Xu
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Chung-an Max Wu
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Venkatakrishnan Rengarajan
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Thomas Dylan Finley
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Hasan Onur Keles
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Yuree Sung
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Baoqiang Li
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Umut Atakan Gurkan
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
| | - Utkan Demirci
- Demirci Bio-Acoustic-MEMS in Medicine (BAMM) Laboratory, Center for Biomedical Engineering, Department of Medicine, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA (USA)
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Wang H, Leeuwenburgh SCG, Li Y, Jansen JA. The use of micro- and nanospheres as functional components for bone tissue regeneration. TISSUE ENGINEERING PART B-REVIEWS 2011; 18:24-39. [PMID: 21806489 DOI: 10.1089/ten.teb.2011.0184] [Citation(s) in RCA: 110] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
During the last decade, the use of micro- and nanospheres as functional components for bone tissue regeneration has drawn increasing interest. Scaffolds comprising micro- and nanospheres display several advantages compared with traditional monolithic scaffolds that are related to (i) an improved control over sustained delivery of therapeutic agents, signaling biomolecules and even pluripotent stem cells, (ii) the introduction of spheres as stimulus-sensitive delivery vehicles for triggered release, (iii) the use of spheres to introduce porosity and/or improve the mechanical properties of bulk scaffolds by acting as porogen or reinforcement phase, (iv) the use of spheres as compartmentalized microreactors for dedicated biochemical processes, (v) the use of spheres as cell delivery vehicle, and, finally, (vi) the possibility of preparing injectable and/or moldable formulations to be applied by using minimally invasive surgery. This article focuses on recent developments with regard to the use of micro- and nanospheres for bone regeneration by categorizing micro-/nanospheres by material class (polymers, ceramics, and composites) as well as summarizing the main strategies that employ these spheres to improve the functionality of scaffolds for bone tissue engineering.
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Affiliation(s)
- Huanan Wang
- Department of Biomaterials, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
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44
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Anitua E, Alkhraisat MH, Orive G. Perspectives and challenges in regenerative medicine using plasma rich in growth factors. J Control Release 2011; 157:29-38. [PMID: 21763737 DOI: 10.1016/j.jconrel.2011.07.004] [Citation(s) in RCA: 136] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Accepted: 06/06/2011] [Indexed: 12/18/2022]
Abstract
Plasma rich in growth factors (PRGF-Endoret) is an endogenous therapeutic technology that is gaining interest in regenerative medicine due to its potential to stimulate and accelerate tissue healing and bone regeneration. This autologous biotechnology is designed for the in situ delivery of multiple cellular modulators and the formation of a fibrin scaffold, thereby providing different formulations that can be widely used in numerous medical and scientific fields including dentistry, oral implantology, orthopedics, ulcer treatment and tissue engineering among others. Here we discuss the important progress that has been accomplished in this field. Furthermore, a comprehensive outlook of the intriguing therapeutic applications of this technology is presented.
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Affiliation(s)
- Eduardo Anitua
- Private Practice in Implantology and Oral Rehabilitation in Vitoria, Spain
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45
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Dubiel EA, Martin Y, Vermette P. Bridging the Gap Between Physicochemistry and Interpretation Prevalent in Cell−Surface Interactions. Chem Rev 2011; 111:2900-36. [DOI: 10.1021/cr9002598] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Evan A. Dubiel
- Laboratoire de bio-ingénierie et de biophysique de l’Université de Sherbrooke, Department of Chemical and Biotechnological Engineering, Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, Québec, Canada J1K 2R1
- Research Centre on Aging, Institut universitaire de gériatrie de Sherbrooke, 1036 rue Belvédère Sud, Sherbrooke, Québec, Canada J1H 4C4
| | - Yves Martin
- Laboratoire de bio-ingénierie et de biophysique de l’Université de Sherbrooke, Department of Chemical and Biotechnological Engineering, Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, Québec, Canada J1K 2R1
- Research Centre on Aging, Institut universitaire de gériatrie de Sherbrooke, 1036 rue Belvédère Sud, Sherbrooke, Québec, Canada J1H 4C4
| | - Patrick Vermette
- Laboratoire de bio-ingénierie et de biophysique de l’Université de Sherbrooke, Department of Chemical and Biotechnological Engineering, Université de Sherbrooke, 2500 Boulevard de l’Université, Sherbrooke, Québec, Canada J1K 2R1
- Research Centre on Aging, Institut universitaire de gériatrie de Sherbrooke, 1036 rue Belvédère Sud, Sherbrooke, Québec, Canada J1H 4C4
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46
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Hung HS, Chen HC, Tsai CH, Lin SZ. Novel Approach by Nanobiomaterials in Vascular Tissue Engineering. Cell Transplant 2011; 20:63-70. [PMID: 20887685 DOI: 10.3727/096368910x532864] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Interactions between vascular endothelial cells (ECs) and biomaterials are important for engineered tissue substitute. The modification of biomaterial surfaces are designed to modulate EC adhesion and responses in order to improve implantation success rate. Specifically, it has now been well established that increased vascular tissue regeneration can be achieved on almost any surface by employing novel nanofabricated surface features. To enhance EC adhesion and growth, material surfaces have been modified with physicochemical and mechanical properties, such as bioactive molecules from the matrix, peptides, and/or growth factors to control EC behavior. The advances in nanotechnology can bring additional functionality to vascular tissue engineering, optimize internal vascular graft surface, help to direct the differentiation of stem cells into the vascular cell phenotype, and, most importantly, also provide a biomaterials-based cellularization process. Nanomaterials could promote in situ endothelialization by mobilizing endothelial progenitor cells (EPCs) from the bone marrow, by encouraging cell-specific adhesion to the vascular graft, and, once attached, by controlling the proliferation and differentiation of these cells. Interaction between different cell types and extracellular matrix continue to be a principal source of inspiration for material biological function and, therefore, the understanding of the molecular mechanism trigger by the interaction is discussed.
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Affiliation(s)
- Huey-Shan Hung
- Center for Neuropsychiatry, China Medical University and Hospital, Taichung, Taiwan
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
| | - Hui-Chen Chen
- Graduate Institute of Basic Medical Science, China Medical University, Taichung, Taiwan
| | - Chang-Hai Tsai
- Department of Pediatrics, China Medical University Hospital, Taichung, Taiwan
- Department of Healthcare Administration, Asia University, Taichung, Taiwan
| | - Shinn-Zong Lin
- Center for Neuropsychiatry, China Medical University and Hospital, Taichung, Taiwan
- Graduate Institute of Immunology, China Medical University, Taichung, Taiwan
- China Medical University Beigang Hospital, Yunlin, Taiwan
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47
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Ito A, Kamihira M. Tissue Engineering Using Magnetite Nanoparticles. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2011; 104:355-95. [DOI: 10.1016/b978-0-12-416020-0.00009-7] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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48
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Dvir T, Timko BP, Kohane DS, Langer R. Nanotechnological strategies for engineering complex tissues. NATURE NANOTECHNOLOGY 2011; 6:13-22. [PMID: 21151110 PMCID: PMC4059057 DOI: 10.1038/nnano.2010.246] [Citation(s) in RCA: 866] [Impact Index Per Article: 66.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Tissue engineering aims at developing functional substitutes for damaged tissues and organs. Before transplantation, cells are generally seeded on biomaterial scaffolds that recapitulate the extracellular matrix and provide cells with information that is important for tissue development. Here we review the nanocomposite nature of the extracellular matrix, describe the design considerations for different tissues and discuss the impact of nanostructures on the properties of scaffolds and their uses in monitoring the behaviour of engineered tissues. We also examine the different nanodevices used to trigger certain processes for tissue development, and offer our view on the principal challenges and prospects of applying nanotechnology in tissue engineering.
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Affiliation(s)
- Tal Dvir
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Children’s Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
| | - Brian P. Timko
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Children’s Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
- Harvard-Massachusetts Institute of Technology Division of Health Sciences and Technology, Cambridge, Massachusetts 02139, USA
| | - Daniel S. Kohane
- Laboratory for Biomaterials and Drug Delivery, Department of Anesthesiology, Division of Critical Care Medicine, Children’s Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, Massachusetts 02115, USA
| | - Robert Langer
- Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
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49
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Yeong WY, Yu H, Lim KP, Ng KLG, Boey YCF, Subbu VS, Tan LP. Multiscale Topological Guidance for Cell Alignment via Direct Laser Writing on Biodegradable Polymer. Tissue Eng Part C Methods 2010; 16:1011-21. [DOI: 10.1089/ten.tec.2009.0604] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Wai Yee Yeong
- Division of Materials Technology, School of Materials Science and Engineering, Nanyang Technological University, Singapore
| | - Haiyang Yu
- Division of Materials Technology, School of Materials Science and Engineering, Nanyang Technological University, Singapore
| | - Kee Pah Lim
- Division of Materials Technology, School of Materials Science and Engineering, Nanyang Technological University, Singapore
| | - Ka Lai Gary Ng
- Singapore Institute of Manufacturing Technology, Singapore
| | - Yin Chiang Freddy Boey
- Division of Materials Technology, School of Materials Science and Engineering, Nanyang Technological University, Singapore
| | - Venkatraman S. Subbu
- Division of Materials Technology, School of Materials Science and Engineering, Nanyang Technological University, Singapore
| | - Lay Poh Tan
- Division of Materials Technology, School of Materials Science and Engineering, Nanyang Technological University, Singapore
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50
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Souza GR, Molina JR, Raphael RM, Ozawa MG, Stark DJ, Levin CS, Bronk LF, Ananta JS, Mandelin J, Georgescu MM, Bankson JA, Gelovani JG, Killian TC, Arap W, Pasqualini R. Three-dimensional tissue culture based on magnetic cell levitation. NATURE NANOTECHNOLOGY 2010; 5:291-6. [PMID: 20228788 PMCID: PMC4487889 DOI: 10.1038/nnano.2010.23] [Citation(s) in RCA: 409] [Impact Index Per Article: 29.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2009] [Accepted: 01/21/2010] [Indexed: 05/17/2023]
Abstract
Cell culture is an essential tool in drug discovery, tissue engineering and stem cell research. Conventional tissue culture produces two-dimensional cell growth with gene expression, signalling and morphology that can be different from those found in vivo, and this compromises its clinical relevance. Here, we report a three-dimensional tissue culture based on magnetic levitation of cells in the presence of a hydrogel consisting of gold, magnetic iron oxide nanoparticles and filamentous bacteriophage. By spatially controlling the magnetic field, the geometry of the cell mass can be manipulated, and multicellular clustering of different cell types in co-culture can be achieved. Magnetically levitated human glioblastoma cells showed similar protein expression profiles to those observed in human tumour xenografts. Taken together, these results indicate that levitated three-dimensional culture with magnetized phage-based hydrogels more closely recapitulates in vivo protein expression and may be more feasible for long-term multicellular studies.
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Affiliation(s)
- Glauco R. Souza
- David H. Koch Center, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Jennifer R. Molina
- Department of Neuro-Oncology, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | | | - Michael G. Ozawa
- David H. Koch Center, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Daniel J. Stark
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005
| | | | - Lawrence F. Bronk
- David H. Koch Center, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | | | - Jami Mandelin
- David H. Koch Center, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Maria-Magdalena Georgescu
- Department of Imaging Physics, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - James A. Bankson
- Department of Experimental Diagnostic Imaging, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Juri G. Gelovani
- Department of Experimental Diagnostic Imaging, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - T. C. Killian
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005
| | - Wadih Arap
- David H. Koch Center, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
| | - Renata Pasqualini
- David H. Koch Center, The University of Texas M. D. Anderson Cancer Center, Houston, Texas 77030
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