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Liu Y, Zhang J, Zhang Y, Yoon HY, Jia X, Roman M, Johnson BN. Accelerated Engineering of Optimized Functional Composite Hydrogels via High-Throughput Experimentation. ACS APPLIED MATERIALS & INTERFACES 2023. [PMID: 37905949 DOI: 10.1021/acsami.3c11483] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/02/2023]
Abstract
The Materials Genome Initiative (MGI) seeks to accelerate the discovery and engineering of advanced materials via high-throughput experimentation (HTE), which is a challenging task, given the common trade-off between design for optimal processability vs performance. Here, we report a HTE method based on automated formulation, synthesis, and multiproperty characterization of bulk soft materials in well plate formats that enables accelerated engineering of functional composite hydrogels with optimized properties for processability and performance. The method facilitates rapid high-throughput screening of hydrogel composition-property relations for multiple properties in well plate formats. The feasibility and utility of the method were demonstrated by application to several functional composite hydrogel systems, including alginate/poly(N-isopropylacrylamide) (PNIPAM) and poly(ethylene glycol) dimethacrylate (PEGDMA)/poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) hydrogels. The HTE method was leveraged to identify formulations of conductive PEGDMA/PEDOT:PSS composite hydrogels for optimized performance and processability in three-dimensional (3D) printing. This work provides an advance in experimental methods based on automated dispensing, mixing, and sensing for the accelerated engineering of soft functional materials.
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Affiliation(s)
- Yang Liu
- Grado Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Junru Zhang
- Grado Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Yujing Zhang
- Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Hu Young Yoon
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Sustainable Biomaterials, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Xiaoting Jia
- Bradley Department of Electrical and Computer Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Maren Roman
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Sustainable Biomaterials, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Blake N Johnson
- Grado Department of Industrial and Systems Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
- Macromolecules Innovation Institute, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Materials Science and Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
- Department of Chemical Engineering, Virginia Tech, Blacksburg, Virginia 24061, United States
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2
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Li G, Liu S, Chen W, Jiang Z, Luo Y, Wang D, Zheng Y, Liu Y. Acellularized Uvea Hydrogel as Novel Injectable Platform for Cell-Based Delivering Treatment of Retinal Degeneration and Optimizing Retinal Organoids Inducible System. Adv Healthc Mater 2022; 11:e2202114. [PMID: 36189847 DOI: 10.1002/adhm.202202114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Indexed: 01/28/2023]
Abstract
Replenishing the retina with retinal pigment epithelial (RPE) cells derived from pluripotent stem cells (PSCs) has great promise for treating retinal degenerative diseases, but it is limited by poor cell survival and integration in vivo. Herein, porcine acellular sclera and uvea extracellular matrix (ECM) and their counterpart hydrogels are developed, and their effects on the biological behavior of human induced pluripotent stem cell (hiPSC)-derived RPE cells (hiPSC-RPE) and embryoid body (hiPSC-EB) differentiation are investigated. Both acellular ECM hydrogels have excellent biocompatibility and suitable biodegradability without evoking an obvious immune response. Most importantly, the decellularized uvea hydrogel-delivered cells' injection remarkably promotes the hiPSC-RPE cells' survival and integration in the subretinal space, rescues the photoreceptor cells' death and retinal gliosis, and restores vision in rats with retinal degeneration for a long duration. In addition, medium supplementation with decellularized uvea peptides promotes hiPSC-EBs onset morphogenesis and neural/retinal differentiation, forming layered retinal organoids. This study demonstrates that ECM hydrogel-delivered hiPSC-RPE cells' injection may be a useful approach for treating retinal degeneration disease, combined with an optimized retinal seeding cells' induction program, which has potential for clinical application.
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Affiliation(s)
- Guilan Li
- Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, #7 Jinsui Road, Tianhe District, Guangzhou, 510060, China.,Research Unit of Ocular Development and Regeneration, Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Sheng Liu
- Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, #7 Jinsui Road, Tianhe District, Guangzhou, 510060, China.,Guangzhou Laboratory, No. 9 XingDaoHuanBei Road, Guangzhou International Bio Island, Guangzhou, 510005, China
| | - Wenfei Chen
- Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, #7 Jinsui Road, Tianhe District, Guangzhou, 510060, China
| | - Zhijian Jiang
- Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, #7 Jinsui Road, Tianhe District, Guangzhou, 510060, China
| | - Yuanting Luo
- Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, #7 Jinsui Road, Tianhe District, Guangzhou, 510060, China
| | - Dongliang Wang
- Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, #7 Jinsui Road, Tianhe District, Guangzhou, 510060, China
| | - Yingfeng Zheng
- Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, #7 Jinsui Road, Tianhe District, Guangzhou, 510060, China.,Research Unit of Ocular Development and Regeneration, Chinese Academy of Medical Sciences, Beijing, 100730, China
| | - Yizhi Liu
- Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-Sen University, #7 Jinsui Road, Tianhe District, Guangzhou, 510060, China.,Research Unit of Ocular Development and Regeneration, Chinese Academy of Medical Sciences, Beijing, 100730, China
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3
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Sharaf A, Roos B, Timmerman R, Kremers GJ, Bajramovic JJ, Accardo A. Two-Photon Polymerization of 2.5D and 3D Microstructures Fostering a Ramified Resting Phenotype in Primary Microglia. Front Bioeng Biotechnol 2022; 10:926642. [PMID: 35979173 PMCID: PMC9376863 DOI: 10.3389/fbioe.2022.926642] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 06/06/2022] [Indexed: 01/02/2023] Open
Abstract
Microglia are the resident macrophages of the central nervous system and contribute to maintaining brain’s homeostasis. Current 2D “petri-dish” in vitro cell culturing platforms employed for microglia, are unrepresentative of the softness or topography of native brain tissue. This often contributes to changes in microglial morphology, exhibiting an amoeboid phenotype that considerably differs from the homeostatic ramified phenotype in healthy brain tissue. To overcome this problem, multi-scale engineered polymeric microenvironments are developed and tested for the first time with primary microglia derived from adult rhesus macaques. In particular, biomimetic 2.5D micro- and nano-pillar arrays (diameters = 0.29–1.06 µm), featuring low effective shear moduli (0.25–14.63 MPa), and 3D micro-cages (volume = 24 × 24 × 24 to 49 × 49 × 49 μm3) with and without micro- and nano-pillar decorations (pillar diameters = 0.24–1 µm) were fabricated using two-photon polymerization (2PP). Compared to microglia cultured on flat substrates, cells growing on the pillar arrays exhibit an increased expression of the ramified phenotype and a higher number of primary branches per ramified cell. The interaction between the cells and the micro-pillar-decorated cages enables a more homogenous 3D cell colonization compared to the undecorated ones. The results pave the way for the development of improved primary microglia in vitro models to study these cells in both healthy and diseased conditions.
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Affiliation(s)
- Ahmed Sharaf
- Department of Precision and Microsystems Engineering, Delft University of Technology, Delft, Netherlands
| | - Brian Roos
- Department of Precision and Microsystems Engineering, Delft University of Technology, Delft, Netherlands
| | - Raissa Timmerman
- Alternatives Unit, Biomedical Primate Research Centre, Rijswijk, Netherlands
| | - Gert-Jan Kremers
- Erasmus Optical Imaging Centre, Erasmus MC, Rotterdam, Netherlands
| | | | - Angelo Accardo
- Department of Precision and Microsystems Engineering, Delft University of Technology, Delft, Netherlands
- *Correspondence: Angelo Accardo,
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Soheilmoghaddam F, Rumble M, Cooper-White J. High-Throughput Routes to Biomaterials Discovery. Chem Rev 2021; 121:10792-10864. [PMID: 34213880 DOI: 10.1021/acs.chemrev.0c01026] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Many existing clinical treatments are limited in their ability to completely restore decreased or lost tissue and organ function, an unenviable situation only further exacerbated by a globally aging population. As a result, the demand for new medical interventions has increased substantially over the past 20 years, with the burgeoning fields of gene therapy, tissue engineering, and regenerative medicine showing promise to offer solutions for full repair or replacement of damaged or aging tissues. Success in these fields, however, inherently relies on biomaterials that are engendered with the ability to provide the necessary biological cues mimicking native extracellular matrixes that support cell fate. Accelerating the development of such "directive" biomaterials requires a shift in current design practices toward those that enable rapid synthesis and characterization of polymeric materials and the coupling of these processes with techniques that enable similarly rapid quantification and optimization of the interactions between these new material systems and target cells and tissues. This manuscript reviews recent advances in combinatorial and high-throughput (HT) technologies applied to polymeric biomaterial synthesis, fabrication, and chemical, physical, and biological screening with targeted end-point applications in the fields of gene therapy, tissue engineering, and regenerative medicine. Limitations of, and future opportunities for, the further application of these research tools and methodologies are also discussed.
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Affiliation(s)
- Farhad Soheilmoghaddam
- Tissue Engineering and Microfluidics Laboratory (TEaM), Australian Institute for Bioengineering and Nanotechnology (AIBN), University Of Queensland, St. Lucia, Queensland, Australia 4072.,School of Chemical Engineering, University Of Queensland, St. Lucia, Queensland, Australia 4072
| | - Madeleine Rumble
- Tissue Engineering and Microfluidics Laboratory (TEaM), Australian Institute for Bioengineering and Nanotechnology (AIBN), University Of Queensland, St. Lucia, Queensland, Australia 4072.,School of Chemical Engineering, University Of Queensland, St. Lucia, Queensland, Australia 4072
| | - Justin Cooper-White
- Tissue Engineering and Microfluidics Laboratory (TEaM), Australian Institute for Bioengineering and Nanotechnology (AIBN), University Of Queensland, St. Lucia, Queensland, Australia 4072.,School of Chemical Engineering, University Of Queensland, St. Lucia, Queensland, Australia 4072
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5
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Sun W, Taylor CS, Zhang Y, Gregory DA, Tomeh MA, Haycock JW, Smith PJ, Wang F, Xia Q, Zhao X. Cell guidance on peptide micropatterned silk fibroin scaffolds. J Colloid Interface Sci 2021; 603:380-390. [PMID: 34186409 DOI: 10.1016/j.jcis.2021.06.086] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 05/27/2021] [Accepted: 06/14/2021] [Indexed: 12/25/2022]
Abstract
Guiding neuronal cell growth is desirable for neural tissue engineering but is very challenging. In this work, a self-assembling ultra-short surfactant-like peptide I3K which possesses positively charged lysine head groups, and hydrophobic isoleucine tails, was chosen to investigate its potential for guiding neuronal cell growth. The peptides were able to self-assemble into nanofibrous structures and interact strongly with silk fibroin (SF) scaffolds, providing a niche for neural cell attachment and proliferation. SF is an excellent biomaterial for tissue engineering. However neuronal cells, such as rat PC12 cells, showed poor attachment on pure regenerated SF (RSF) scaffold surfaces. Patterning of I3K peptide nanofibers on RSF surfaces significantly improved cellular attachment, cellular density, as well as morphology of PC12 cells. The live / dead assay confirmed that RSF and I3K have negligible cytotoxicity against PC12 cells. Atomic force microscopy (AFM) was used to image the topography and neurite formation of PC12 cells, where results revealed that self-assembled I3K nanofibers can support the formation of PC12 cell neurites. Immunolabelling also demonstrated that coating of I3K nanofibers onto the RSF surfaces not only increased the percentage of cells bearing neurites but also increased the average maximum neurite length. Therefore, the peptide I3K could be used as an alternative to poly-l-lysine for cell culture and tissue engineering applications. As micro-patterning of neural cells to guide neurite growth is important for developing nerve tissue engineering scaffolds, inkjet printing was used to pattern self-assembled I3K peptide nanofibers on RSF surfaces for directional control of PC12 cell growth. The results demonstrated that inkjet-printed peptide micro-patterns can effectively guide the cell alignment and organization on RSF scaffold surfaces, providing great potential for nerve regeneration applications.
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Affiliation(s)
- Weizhen Sun
- Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, UK
| | - Caroline S Taylor
- Department of Materials Science & Engineering, University of Sheffield, Sheffield S1 3JD, UK
| | - Yi Zhang
- Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, UK
| | - David A Gregory
- Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, UK; Department of Materials Science & Engineering, University of Sheffield, Sheffield S1 3JD, UK
| | - Mhd Anas Tomeh
- Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, UK
| | - John W Haycock
- Department of Materials Science & Engineering, University of Sheffield, Sheffield S1 3JD, UK
| | - Patrick J Smith
- Department of Mechanical Engineering, University of Sheffield, Sheffield S1 4BJ, UK
| | - Feng Wang
- Biological Science Research Centre, Chongqing Key Laboratory of Sericultural Science, Chongqing Engineering and Technology Research Centre for Novel Silk Materials, Southwest University, Chongqing 400715, China
| | - Qingyou Xia
- Biological Science Research Centre, Chongqing Key Laboratory of Sericultural Science, Chongqing Engineering and Technology Research Centre for Novel Silk Materials, Southwest University, Chongqing 400715, China
| | - Xiubo Zhao
- Department of Chemical and Biological Engineering, University of Sheffield, Sheffield S1 3JD, UK; School of Pharmacy, Changzhou University, Changzhou 213164, China.
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6
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Mukherjee N, Adak A, Ghosh S. Recent trends in the development of peptide and protein-based hydrogel therapeutics for the healing of CNS injury. SOFT MATTER 2020; 16:10046-10064. [PMID: 32724981 DOI: 10.1039/d0sm00885k] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Traumatic brain injury (TBI) and spinal cord injury (SCI) cause millions of deaths and permanent or prolonged physical disabilities around the globe every year. It generally happens due to various incidents, such as accidents during sports, war, physical assault, and strokes which result in severe damage to brain and spinal cord. If this remains untreated, traumatic CNS injuries may lead to early development of several neurodegenerative diseases like Alzheimer's, Parkinson, multiple sclerosis, and other mental illnesses. The initial physical reaction, which is also termed as the primary phase, includes swelling, followed by inflammation as a result of internal haemorrhage causing damage to indigenous tissue, i.e., axonal shear injury, rupture of blood vessels, and partial impaired supply of oxygen and essential nutrients in the neurons, thereby initiating a cascade of events causing secondary injuries such as hypoxia, hypotension, cognitive impairment, seizures, imbalanced calcium homeostasis and glutamate-induced excitotoxicity resulting in concomitant neuronal cell death and cumulative permanent tissue damage. In the modern era of advanced biomedical technology, we are still living with scarcity of the clinically applicable comparative non-invasive therapeutic strategies for regeneration or functional recovery of neurons or neural networks after a massive CNS injury. One of the key reasons for this scarcity is the limited regenerative ability of neurons in CNS. Growth-impermissive glial scar and the lack of a synthetic biocompatible platform for proper neural tissue engineering and controlled supply of drugs further retard the healing process. Injectable or implantable hydrogel materials, consisting majorly of water in its porous three-dimensional (3D) structure, can serve as an excellent drug delivery platform as well as a transplanted cell-supporting scaffold medium. Among the various neuro-compatible bioinspired materials, we are limiting our discussion to the recent advancement of engineered biomaterials comprising mainly of peptides and proteins due to their growing demand, low immunogenicity and versatility in the fabrication of neuro regenerative medicine. In this article, we try to explore all the recent scientific avenues that are developing gradually to make peptide and peptide-conjugated biomaterial hydrogels as a therapeutic and supporting scaffold for treating CNS injuries.
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Affiliation(s)
- Nabanita Mukherjee
- Department of Bioscience & Bioengineering, Indian Institute of Technology Jodhpur, NH 65, Surpura Bypass Road, Karwar, Rajasthan 342037, India.
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7
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Lowen JM, Leach JK. Functionally graded biomaterials for use as model systems and replacement tissues. ADVANCED FUNCTIONAL MATERIALS 2020; 30:1909089. [PMID: 33456431 PMCID: PMC7810245 DOI: 10.1002/adfm.201909089] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Indexed: 05/03/2023]
Abstract
The heterogeneity of native tissues requires complex materials to provide suitable substitutes for model systems and replacement tissues. Functionally graded materials have the potential to address this challenge by mimicking the gradients in heterogeneous tissues such as porosity, mineralization, and fiber alignment to influence strength, ductility, and cell signaling. Advancements in microfluidics, electrospinning, and 3D printing enable the creation of increasingly complex gradient materials that further our understanding of physiological gradients. The combination of these methods enables rapid prototyping of constructs with high spatial resolution. However, successful translation of these gradients requires both spatial and temporal presentation of cues to model the complexity of native tissues that few materials have demonstrated. This review highlights recent strategies to engineer functionally graded materials for the modeling and repair of heterogeneous tissues, together with a description of how cells interact with various gradients.
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Affiliation(s)
- Jeremy M. Lowen
- Department of Biomedical Engineering, University of California, Davis, CA, 95616
| | - J. Kent Leach
- Department of Biomedical Engineering, University of California, Davis, CA, 95616
- Department of Orthopaedic Surgery, UC Davis Health, Sacramento, CA 95817
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8
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Zoughaib M, Luong D, Garifullin R, Gatina DZ, Fedosimova SV, Abdullin TI. Enhanced angiogenic effects of RGD, GHK peptides and copper (II) compositions in synthetic cryogel ECM model. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 120:111660. [PMID: 33545827 DOI: 10.1016/j.msec.2020.111660] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 09/24/2020] [Accepted: 10/18/2020] [Indexed: 02/07/2023]
Abstract
Synthetic oligopeptides are a promising alternative to natural full-length growth factors and extracellular matrix (ECM) proteins in tissue regeneration and therapeutic angiogenesis applications. In this work, angiogenic properties of dual and triple compositions containing RGD, GHK peptides and copper (II) ions (Cu2+) were for the first time studied. To reveal specific in vitro effects of these compositions in three-dimensional scaffold, adamantyl group bearing peptides, namely Ada-Ahx-GGRGD (1) and Ada-Ahx-GGGHK (2), were effectively immobilized in bioinert pHEMA macroporous cryogel via host-guest β-cyclodextrin-adamantane interaction. The cryogels were additionally functionalized with Cu2+ via the formation of GHK-Cu complex. Angiogenic responses of HUVECs grown within the cryogel ECM model were analyzed. The results demonstrate that the combination of RGD with GHK and further with Cu2+ dramatically increases cell proliferation, differentiation, and production of a series of angiogenesis related cytokines and growth factors. Furthermore, the level of glutathione, a key cellular antioxidant and redox regulator, was altered in relation to the angiogenic effects. These results are of particular interest for establishing the role of multiple peptide signals on regeneration related processes and for developing improved tissue engineering materials.
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Affiliation(s)
- Mohamed Zoughaib
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia
| | - Duong Luong
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia
| | - Ruslan Garifullin
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia; Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey
| | - Dilara Z Gatina
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia
| | - Svetlana V Fedosimova
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia
| | - Timur I Abdullin
- Institute of Fundamental Medicine and Biology, Kazan Federal University, 420008 Kazan, Russia.
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9
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Perera TH, Lu X, Howell SM, Kurosu YE, Smith Callahan LA. Combination of IKVAV, LRE, and GPQGIWGQ Bioactive Signaling Peptides Increases Human Induced Pluripotent Stem Cell Derived Neural Stem Cells Extracellular Matrix Remodeling and Neurite Extension. ACTA ACUST UNITED AC 2020; 4:e2000084. [PMID: 32597036 DOI: 10.1002/adbi.202000084] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 06/04/2020] [Indexed: 12/20/2022]
Abstract
Extracellular matrix (ECM) remodeling is emerging as a modulator of neural maturation and axon extension. Most studies have used rodent cells to develop matrices capable of manipulating extracellular matrix remodeling for regenerative applications. However, clinically relevant human induced pluripotent stem cell derived neural stem cells (hNSC) do not always behave in a similar manner as rodent cells. In this study, hNSC response to a hyaluronic acid matrix with laminin derived IKVAV and LRE peptide signaling that has previously shown to promote ECM remodeling and neurite extension by mouse embryonic stem cells is examined. The addition of enzymatically degradable cross linker GPQGIWGQ to the IKVAV and LRE containing hyaluronic acid matrix is necessary to promote neurite extension, hyaluronic acid degradation, and gelatinase expression over hyaluronic acid matrices containing GPQGIWGQ, IKVAV and LRE, or no peptides. Changes in peptide content alters a number of matrix properties that can contribute to the cellular response, but increases in mesh size are not observed with cross linker cleavage in this study. Overall, these data imply a complex interaction between IKVAV, LRE, and GPQGIWGQ to modulate hNSC behavior.
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Affiliation(s)
- T Hiran Perera
- Vivian L. Smith Department of Neurosurgery & Center for Stem Cells and Regenerative Medicine, McGovern Medical School, 1825 Pressler Suite 630F, Houston, TX, 77030, USA
| | - Xi Lu
- Vivian L. Smith Department of Neurosurgery & Center for Stem Cells and Regenerative Medicine, McGovern Medical School, 1825 Pressler Suite 630F, Houston, TX, 77030, USA
| | - Skyler M Howell
- Vivian L. Smith Department of Neurosurgery & Center for Stem Cells and Regenerative Medicine, McGovern Medical School, 1825 Pressler Suite 630F, Houston, TX, 77030, USA
| | - Yuki E Kurosu
- Vivian L. Smith Department of Neurosurgery & Center for Stem Cells and Regenerative Medicine, McGovern Medical School, 1825 Pressler Suite 630F, Houston, TX, 77030, USA
| | - Laura A Smith Callahan
- Vivian L. Smith Department of Neurosurgery & Center for Stem Cells and Regenerative Medicine, McGovern Medical School, 1825 Pressler Suite 630F, Houston, TX, 77030, USA
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10
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Perera TH, Lu X, Smith Callahan LA. Effect of Laminin Derived Peptides IKVAV and LRE Tethered to Hyaluronic Acid on hiPSC Derived Neural Stem Cell Morphology, Attachment and Neurite Extension. J Funct Biomater 2020; 11:E15. [PMID: 32155839 PMCID: PMC7151619 DOI: 10.3390/jfb11010015] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2020] [Revised: 03/03/2020] [Accepted: 03/04/2020] [Indexed: 12/23/2022] Open
Abstract
Low neural tissue extracellular matrix (ECM) content has led to the understudy of its effects on neural cells and tissue. Hyaluronic acid (HA) and laminin are major neural ECM components, but direct comparisons of their cellular effects could not be located in the literature. The current study uses human-induced pluripotent stem-cell-derived neural stem cells to assess the effects of HA, laminin, and HA with laminin-derived peptides IKVAV and LRE on cellular morphology, attachment, neurite extension and ECM remodeling. Increased attachment was observed on HA with and without IKVAV and LRE compared to laminin. Cellular morphology and neurite extension were similar on all surfaces. Using a direct binding inhibitor of Cav2.2 voltage gated calcium channel activity, a known binding partner of LRE, reduced attachment on HA with and without IKVAV and LRE and altered cellular morphology on surfaces with laminin or IKVAV and LRE. HA with IKVAV and LRE reduced the fluorescent intensity of fibronectin staining, but did not alter the localization of ECM remodeling enzymes matrix metalloprotease 2 and 9 staining compared to HA. Overall, the data indicate HA, IKVAV and LRE have complementary effects on human-induced pluripotent stem-cell-derived neural stem cell behavior.
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Affiliation(s)
- T. Hiran Perera
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030, USA; (T.H.P.); (X.L.)
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Xi Lu
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030, USA; (T.H.P.); (X.L.)
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, Houston, TX 77030, USA
| | - Laura A Smith Callahan
- Vivian L. Smith Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston McGovern Medical School, Houston, TX 77030, USA; (T.H.P.); (X.L.)
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, Houston, TX 77030, USA
- Graduate School of Biomedical Sciences, MD Anderson Cancer Center UTHealth, Houston, TX 77030, USA
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11
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Tuning the gelation behavior of short laminin derived peptides via solvent mediated self-assembly. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 108:110483. [DOI: 10.1016/j.msec.2019.110483] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Revised: 11/17/2019] [Accepted: 11/20/2019] [Indexed: 12/12/2022]
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12
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In Vitro Evaluation of the Influence of Substrate Mechanics on Matrix-Assisted Human Chondrocyte Transplantation. J Funct Biomater 2020; 11:jfb11010005. [PMID: 31963629 PMCID: PMC7151603 DOI: 10.3390/jfb11010005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 01/09/2020] [Accepted: 01/15/2020] [Indexed: 11/25/2022] Open
Abstract
Matrix-assisted chondrocyte transplantation (MACT) is of great interest for the treatment of patients with cartilage lesions. However, the roles of the matrix properties in modulating cartilage tissue integration during MACT recovery have not been fully understood. The objective of this study was to uncover the effects of substrate mechanics on the integration of implanted chondrocyte-laden hydrogels with native cartilage tissues. To this end, agarose hydrogels with Young’s moduli ranging from 0.49 kPa (0.5%, w/v) to 23.08 kPa (10%) were prepared and incorporated into an in vitro human cartilage explant model. The hydrogel-cartilage composites were cultivated for up to 12 weeks and harvested for evaluation via scanning electron microscopy, histology, and a push-through test. Our results demonstrated that integration strength at the hydrogel-cartilage interface in the 1.0% (0.93 kPa) and 2.5% (3.30 kPa) agarose groups significantly increased over time, whereas hydrogels with higher stiffness (>8.78 kPa) led to poor integration with articular cartilage. Extensive sprouting of extracellular matrix in the interfacial regions was only observed in the 0.5% to 2.5% agarose groups. Collectively, our findings suggest that while neocartilage development and its integration with native cartilage are modulated by substrate elasticity, an optimal Young’s modulus (3.30 kPa) possessed by agarose hydrogels is identified such that superior quality of tissue integration is achieved without compromising tissue properties of implanted constructs.
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13
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Ashammakhi N, Kim HJ, Ehsanipour A, Bierman RD, Kaarela O, Xue C, Khademhosseini A, Seidlits SK. Regenerative Therapies for Spinal Cord Injury. TISSUE ENGINEERING PART B-REVIEWS 2019; 25:471-491. [PMID: 31452463 DOI: 10.1089/ten.teb.2019.0182] [Citation(s) in RCA: 92] [Impact Index Per Article: 18.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Spinal cord injury (SCI) is a serious problem that primarily affects younger and middle-aged adults at its onset. To date, no effective regenerative treatment has been developed. Over the last decade, researchers have made significant advances in stem cell technology, biomaterials, nanotechnology, and immune engineering, which may be applied as regenerative therapies for the spinal cord. Although the results of clinical trials using specific cell-based therapies have proven safe, their efficacy has not yet been demonstrated. The pathophysiology of SCI is multifaceted, complex and yet to be fully understood. Thus, combinatorial therapies that simultaneously leverage multiple approaches will likely be required to achieve satisfactory outcomes. Although combinations of biomaterials with pharmacologic agents or cells have been explored, few studies have combined these modalities in a systematic way. For most strategies, clinical translation will be facilitated by the use of minimally invasive therapies, which are the focus of this review. In addition, this review discusses previously explored therapies designed to promote neuroregeneration and neuroprotection after SCI, while highlighting present challenges and future directions. Impact Statement To date there are no effective treatments that can regenerate the spinal cord after injury. Although there have been significant preclinical advances in bioengineering and regenerative medicine over the last decade, these have not translated into effective clinical therapies for spinal cord injury. This review focuses on minimally invasive therapies, providing extensive background as well as updates on recent technological developments and current clinical trials. This review is a comprehensive resource for researchers working towards regenerative therapies for spinal cord injury that will help guide future innovation.
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Affiliation(s)
- Nureddin Ashammakhi
- Division of Plastic Surgery, Department of Surgery, Oulu University, Oulu, Finland.,Center for Minimally Invasive Therapeutics (C-MIT), Los Angeles, California.,California NanoSystems Institute (CNSI), Los Angeles, California.,Department of Radiological Sciences, University of California, Los Angeles, Los Angeles, California.,Department of Bioengineering, University of California, Los Angeles, Los Angeles, California
| | - Han-Jun Kim
- Center for Minimally Invasive Therapeutics (C-MIT), Los Angeles, California.,California NanoSystems Institute (CNSI), Los Angeles, California.,Department of Bioengineering, University of California, Los Angeles, Los Angeles, California
| | | | | | - Outi Kaarela
- Division of Plastic Surgery, Department of Surgery, Oulu University, Oulu, Finland
| | - Chengbin Xue
- Center for Minimally Invasive Therapeutics (C-MIT), Los Angeles, California.,California NanoSystems Institute (CNSI), Los Angeles, California.,Department of Bioengineering, University of California, Los Angeles, Los Angeles, California.,Key Laboratory of Neuroregeneration of Jiangsu and Ministry of Education, Co-Innovation Center of Neuroregeneration, Nantong University, Nantong, P.R. China.,Jiangsu Clinical Medicine Center of Tissue Engineering and Nerve Injury Repair, Research Center of Clinical Medicine, Affiliated Hospital of Nantong University, Nantong University, Nantong, P.R. China
| | - Ali Khademhosseini
- Center for Minimally Invasive Therapeutics (C-MIT), Los Angeles, California.,California NanoSystems Institute (CNSI), Los Angeles, California.,Department of Radiological Sciences, University of California, Los Angeles, Los Angeles, California.,Department of Bioengineering, University of California, Los Angeles, Los Angeles, California.,Center of Nanotechnology, King Abdulaziz University, Jeddah, Saudi Arabia.,Department of Chemical and Biological Engineering, University of California, Los Angeles, California
| | - Stephanie K Seidlits
- Center for Minimally Invasive Therapeutics (C-MIT), Los Angeles, California.,California NanoSystems Institute (CNSI), Los Angeles, California.,Jonsson Comprehensive Cancer Center, University of California, Los Angeles, Los Angeles, California.,Broad Stem Cell Research Center, University of California, Los Angeles, Los Angeles, California.,Brain Research Institute, University of California, Los Angeles, Los Angeles, California
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14
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Zimmermann JA, Schaffer DV. Engineering biomaterials to control the neural differentiation of stem cells. Brain Res Bull 2019; 150:50-60. [DOI: 10.1016/j.brainresbull.2019.05.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 04/09/2019] [Accepted: 05/09/2019] [Indexed: 12/13/2022]
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15
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Perera TH, Howell SM, Smith Callahan LA. Manipulation of Extracellular Matrix Remodeling and Neurite Extension by Mouse Embryonic Stem Cells Using IKVAV and LRE Peptide Tethering in Hyaluronic Acid Matrices. Biomacromolecules 2019; 20:3009-3020. [PMID: 31306008 DOI: 10.1021/acs.biomac.9b00578] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Cellular remodeling of the matrix has recently emerged as a key factor in promoting neural differentiation. Most strategies to manipulate matrix remodeling focus on proteolytically cleavable cross-linkers, leading to changes in tethered biochemical signaling and matrix properties. Using peptides that are not the direct target of enzymatic degradation will likely reduce changes in the matrix and improve control of biological behavior. In this study, laminin-derived peptides, IKVAV and LRE, tethered to independent sites in hyaluronic acid matrices using Michael addition and strain-promoted azide-alkyne cycloaddition are sufficient to manipulate hyaluronic acid degradation, gelatinase expression, and protease expression, while promoting neurite extension through matrix metalloprotease-dependent mechanisms in mouse embryonic stem cells encapsulated in hyaluronic acid matrices using an oxidation-reduction reaction initiated gelation. This study provides the foundation for a new strategy to stimulate matrix remodeling that is not dependent on enzymatic cleavage targets.
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Affiliation(s)
- T Hiran Perera
- Vivian L. Smith Department of Neurosurgery , McGovern Medical School at the University of Texas Health Science Center at Houston McGovern Medical School , Houston , Texas 77030 , United States.,Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine , McGovern Medical School at the University of Texas Health Science Center at Houston , Houston , Texas 77030 , United States
| | - Skyler M Howell
- Vivian L. Smith Department of Neurosurgery , McGovern Medical School at the University of Texas Health Science Center at Houston McGovern Medical School , Houston , Texas 77030 , United States.,Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine , McGovern Medical School at the University of Texas Health Science Center at Houston , Houston , Texas 77030 , United States
| | - Laura A Smith Callahan
- Vivian L. Smith Department of Neurosurgery , McGovern Medical School at the University of Texas Health Science Center at Houston McGovern Medical School , Houston , Texas 77030 , United States.,Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine , McGovern Medical School at the University of Texas Health Science Center at Houston , Houston , Texas 77030 , United States.,Graduate School of Biomedical Sciences , MD Anderson Cancer Center UTHealth , Houston , Texas 77030 , United States
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16
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Sahab Negah S, Oliazadeh P, Jahanbazi Jahan-Abad A, Eshaghabadi A, Samini F, Ghasemi S, Asghari A, Gorji A. Transplantation of human meningioma stem cells loaded on a self-assembling peptide nanoscaffold containing IKVAV improves traumatic brain injury in rats. Acta Biomater 2019; 92:132-144. [PMID: 31075516 DOI: 10.1016/j.actbio.2019.05.010] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Revised: 05/02/2019] [Accepted: 05/06/2019] [Indexed: 12/20/2022]
Abstract
Traumatic brain injury (TBI) can result in permanent brain function impairment due to the poor regenerative ability of neural tissue. Tissue engineering has appeared as a promising approach to promote nerve regeneration and to ameliorate brain damage. The present study was designed to investigate the effect of transplantation of the human meningioma stem-like cells (hMgSCs) seeded in a promising three-dimensional scaffold (RADA4GGSIKVAV; R-GSIK) on the functional recovery of the brain and neuroinflammatory responses following TBI in rats. After induction of TBI, hMgSCs seeded in R-GSIK was transplanted within the injury site and its effect was compared to several control groups. Application of hMgSCs with R-GSIK improved functional recovery after TBI. A significant higher number of hMgSCs was observed in the brain when transplanted with R-GSIK scaffold compared to the control groups. Application of hMgSCs seeded in R-GSIK significantly decreased the lesion volume, reactive gliosis, and apoptosis at the injury site. Furthermore, treatment with hMgSCs seeded in R-GSIK significantly inhibited the expression of Toll-like receptor 4 and its downstream signaling molecules, including interleukin-1β and tumor necrosis factor. These data revealed the potential for hMgSCs seeded in R-GSIK to improve the functional recovery of the brain after TBI; possibly via amelioration of inflammatory responses. STATEMENT OF SIGNIFICANCE: Tissue engineered scaffolds that mimic the natural extracellular matrix of the brain may modulate stem cell fate and contribute to tissue repair following traumatic brain injury (TBI). Among several scaffolds, self-assembly peptide nanofiber scaffolds markedly promotes cellular behaviors, including cell survival and differentiation. We developed a novel three-dimensional scaffold (RADA16GGSIKVAV; R-GSIK). Transplantation of the human meningioma stem-like cells seeded in R-GSIK in an animal model of TBI significantly improved functional recovery of the brain, possibly via enhancement of stem cell survival as well as reduction of the lesion volume, inflammatory process, and reactive gliosis at the injury site. R-GSIK is a suitable microenvironment for human stem cells and could be a potential biomaterial for the reconstruction of the injured brain after TBI.
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17
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George J, Hsu CC, Nguyen LTB, Ye H, Cui Z. Neural tissue engineering with structured hydrogels in CNS models and therapies. Biotechnol Adv 2019; 42:107370. [PMID: 30902729 DOI: 10.1016/j.biotechadv.2019.03.009] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 02/25/2019] [Accepted: 03/11/2019] [Indexed: 01/27/2023]
Abstract
The development of techniques to create and use multiphase microstructured hydrogels (granular hydrogels or microgels) has enabled the generation of cultures with more biologically relevant architecture and use of structured hydrogels is especially pertinent to the development of new types of central nervous system (CNS) culture models and therapies. We review material choice and the customisation of hydrogel structure, as well as the use of hydrogels in developmental models. Combining the use of structured hydrogel techniques with developmentally relevant tissue culture approaches will enable the generation of more relevant models and treatments to repair damaged CNS tissue architecture.
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Affiliation(s)
- Julian George
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford, United Kingdom
| | - Chia-Chen Hsu
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford, United Kingdom
| | - Linh Thuy Ba Nguyen
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford, United Kingdom
| | - Hua Ye
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford, United Kingdom.
| | - Zhanfeng Cui
- Institute of Biomedical Engineering, Department of Engineering Science, University of Oxford, Oxford, United Kingdom.
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18
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Wilems T, Vardhan S, Wu S, Sakiyama-Elbert S. The influence of microenvironment and extracellular matrix molecules in driving neural stem cell fate within biomaterials. Brain Res Bull 2019; 148:25-33. [PMID: 30898579 DOI: 10.1016/j.brainresbull.2019.03.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2018] [Revised: 03/07/2019] [Accepted: 03/12/2019] [Indexed: 12/17/2022]
Abstract
Transplantation of stem cells is a promising potential therapy for central nervous system disease and injury. The capacity for self-renewal, proliferation of progenitor cells, and multi-lineage potential underscores the need for controlling stem cell fate. Furthermore, transplantation within a hostile environment can lead to significant cell death and limited therapeutic potential. Tissue-engineered materials have been developed to both regulate stem cell fate, increase transplanted cell viability, and improve therapeutic outcomes. Traditionally, regulation of stem cell differentiation has been driven through soluble signals, such as growth factors. While these signals are important, insoluble factors from the local microenvironment or extracellular matrix (ECM) molecules also contribute to stem cell activity and fate. Understanding the microenvironment factors that influence stem cell fate, such as mechanical properties, topography, and presentation of specific ECM ligands, is necessary for designing improved biomaterials. Here we review some of the microenvironment factors that regulate stem cell fate and how they can be incorporated into biomaterials as part of potential CNS therapies.
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Affiliation(s)
- Thomas Wilems
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas, 78712, USA
| | - Sangamithra Vardhan
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas, 78712, USA
| | - Siliang Wu
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas, 78712, USA
| | - Shelly Sakiyama-Elbert
- Department of Biomedical Engineering, University of Texas at Austin, Austin, Texas, 78712, USA.
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19
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Bertucci TB, Dai G. Biomaterial Engineering for Controlling Pluripotent Stem Cell Fate. Stem Cells Int 2018; 2018:9068203. [PMID: 30627175 PMCID: PMC6304878 DOI: 10.1155/2018/9068203] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Accepted: 10/11/2018] [Indexed: 01/02/2023] Open
Abstract
Pluripotent stem cells (PSCs) represent an exciting cell source for tissue engineering and regenerative medicine due to their self-renewal and differentiation capacities. The majority of current PSC protocols rely on 2D cultures and soluble factors to guide differentiation; however, many other environmental signals are beginning to be explored using biomaterial platforms. Biomaterials offer new opportunities to engineer the stem cell niches and 3D environments for exploring biophysical and immobilized signaling cues to further our control over stem cell fate. Here, we review the biomaterial platforms that have been engineered to control PSC fate. We explore how altering immobilized biochemical cues and biophysical cues such as dimensionality, stiffness, and topography can enhance our control over stem cell fates. Finally, we highlight biomaterial culture systems that assist in the translation of PSC technologies for clinical applications.
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Affiliation(s)
- Taylor B Bertucci
- Department of Bioengineering, Northeastern University, Boston, MA 02115, USA
| | - Guohao Dai
- Department of Bioengineering, Northeastern University, Boston, MA 02115, USA
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20
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Patel R, Santhosh M, Dash JK, Karpoormath R, Jha A, Kwak J, Patel M, Kim JH. Ile-Lys-Val-ala-Val (IKVAV) peptide for neuronal tissue engineering. POLYM ADVAN TECHNOL 2018. [DOI: 10.1002/pat.4442] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Rajkumar Patel
- Energy and Environmental Science and Engineering, Integrated Science and Engineering Division (ISED), Underwood International College; Yonsei University; 85 Songdogwahak-ro, Yeonsu-gu Incheon South Korea 21983
| | - Mallesh Santhosh
- Department of Biosciences and Bioengineering; Indian Institute of Technology Guwahati; Guwahati 781039 Assam India
| | - Jatis Kumar Dash
- Department of Physics; SRM University-AP; Amaravati 522502 Guntur India
| | - Rajshekhar Karpoormath
- Department of Pharmaceutical Chemistry, College of Health Sciences; University of Kwa Zulu Natal; Durban 4000 South Africa
| | - Amitabh Jha
- Department of Chemistry; Acadia University; Wolfville NS Canada
| | - Jeonghun Kwak
- School of Electrical and Computer Engineering; The University of Seoul; Seoul 02504 South Korea
| | - Madhumita Patel
- Department of Chemistry and Nano Science; Ewha Womans University; Seodaemungu Seoul 120-750 South Korea
| | - Jong Hak Kim
- Department of Chemical and Biomolecular Engineering; Yonsei University; 50 Yonsei-ro, Seodaemun-gu Seoul 03722 South Korea
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21
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Towards Three-Dimensional Dynamic Regulation and In Situ Characterization of Single Stem Cell Phenotype Using Microfluidics. Mol Biotechnol 2018; 60:843-861. [DOI: 10.1007/s12033-018-0113-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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22
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Lu X, Perera TH, Aria AB, Callahan LAS. Polyethylene glycol in spinal cord injury repair: a critical review. J Exp Pharmacol 2018; 10:37-49. [PMID: 30100766 PMCID: PMC6067622 DOI: 10.2147/jep.s148944] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Polyethylene glycol (PEG) is a synthetic biocompatible polymer with many useful properties for developing therapeutics to treat spinal cord injury. Direct application of PEG as a fusogen to the injury site can repair cell membranes, mitigate oxidative stress, and promote axonal regeneration to restore motor function. PEG can be covalently or noncovalently conjugated to proteins, peptides, and nanoparticles to limit their clearance by the reticuloendothelial system, reduce their immunogenicity, and facilitate crossing the blood-brain barrier. Cross-linking PEG produces hydrogels that can act as delivery vehicles for bioactive molecules including growth factors and cells such as bone marrow stromal cells, which can modulate the inflammatory response and support neural tissue regeneration. PEG hydrogels can be cross-linked in vitro or delivered as an injectable formulation that can gel in situ at the site of injury. Chemical and mechanical properties of PEG hydrogels are tunable and must be optimized for creating the most favorable delivery environment. Peptides mimicking extracellular matrix protein such as laminin and n-cadherin can be incorporated into PEG hydrogels to promote neural differentiation and axonal extensions. Different hydrogel cross-linking densities and stiffness will also affect the differentiation process. PEG hydrogels with a gradient of peptide concentrations or Young's modulus have been developed to systematically study these factors. This review will describe these and other recent advancements of PEG in the field of spinal cord injury in greater detail.
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Affiliation(s)
- Xi Lu
- Department of Neurosurgery, Center for Stem Cells and Regenerative Medicine, University of Texas Health Science Center at Houston, Houston, TX, USA,
| | - T Hiran Perera
- Department of Neurosurgery, Center for Stem Cells and Regenerative Medicine, University of Texas Health Science Center at Houston, Houston, TX, USA,
| | - Alexander B Aria
- Department of Neurosurgery, Center for Stem Cells and Regenerative Medicine, University of Texas Health Science Center at Houston, Houston, TX, USA,
| | - Laura A Smith Callahan
- Department of Neurosurgery, Center for Stem Cells and Regenerative Medicine, University of Texas Health Science Center at Houston, Houston, TX, USA,
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23
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Kim Y, Meade SM, Chen K, Feng H, Rayyan J, Hess-Dunning A, Ereifej ES. Nano-Architectural Approaches for Improved Intracortical Interface Technologies. Front Neurosci 2018; 12:456. [PMID: 30065623 PMCID: PMC6056633 DOI: 10.3389/fnins.2018.00456] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Accepted: 06/14/2018] [Indexed: 12/19/2022] Open
Abstract
Intracortical microelectrodes (IME) are neural devices that initially were designed to function as neuroscience tools to enable researchers to understand the nervous system. Over the years, technology that aids interfacing with the nervous system has allowed the ability to treat patients with a wide range of neurological injuries and diseases. Despite the substantial success that has been demonstrated using IME in neural interface applications, these implants eventually fail due to loss of quality recording signals. Recent strategies to improve interfacing with the nervous system have been inspired by methods that mimic the native tissue. This review focusses on one strategy in particular, nano-architecture, a term we introduce that encompasses the approach of roughening the surface of the implant. Various nano-architecture approaches have been hypothesized to improve the biocompatibility of IMEs, enhance the recording quality, and increase the longevity of the implant. This review will begin by introducing IME technology and discuss the challenges facing the clinical deployment of IME technology. The biological inspiration of nano-architecture approaches will be explained as well as leading fabrication methods used to create nano-architecture and their limitations. A review of the effects of nano-architecture surfaces on neural cells will be examined, depicting the various cellular responses to these modified surfaces in both in vitro and pre-clinical models. The proposed mechanism elucidating the ability of nano-architectures to influence cellular phenotype will be considered. Finally, the frontiers of next generation nano-architecture IMEs will be identified, with perspective given on the future impact of this interfacing approach.
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Affiliation(s)
- Youjoung Kim
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, United States
| | - Seth M. Meade
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, United States
| | - Keying Chen
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, United States
| | - He Feng
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, United States
| | - Jacob Rayyan
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, United States
| | - Allison Hess-Dunning
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, United States
| | - Evon S. Ereifej
- Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States
- Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, United States
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24
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Lim HJ, Khan Z, Lu X, Perera TH, Wilems TS, Ravivarapu KT, Smith Callahan LA. Mechanical stabilization of proteolytically degradable polyethylene glycol dimethacrylate hydrogels through peptide interaction. Acta Biomater 2018. [PMID: 29526829 DOI: 10.1016/j.actbio.2018.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Balancing enhancement of neurite extension against loss of matrix support in synthetic hydrogels containing proteolytically degradable and bioactive signaling peptides to optimize tissue formation is difficult. Using a systematic approach, polyethylene glycol hydrogels containing concurrent continuous concentration gradients of the laminin derived bioactive signaling peptide, Ile-Lys-Val-Ala-Val (IKVAV), and collagen derived matrix metalloprotease degradable peptide, GPQGIWGQ, were fabricated and characterized. During proteolytic degradation of the concentration gradient hydrogels, the IKVAV and IWGQ cleavage fragment from GPQGIWGQ were found to interact and stabilize the bulk Young's Modulus of the hydrogel. Further testing of discrete samples containing GPQGIWGQ or its cleavage fragments, GPQG and IWGQ, indicates hydrophobic interactions between the peptides are not necessary for mechanical stabilization of the hydrogel, but changes in the concentration ratio between the peptides tethered in the hydrogel and salts and ions in the swelling solution can affect the stabilization. Encapsulation of human induced pluripotent stem cell derived neural stem cells did not reduce the mechanical properties of the hydrogel over a 14 day neural differentiation culture period, and IKVAV was found to maintain concentration dependent effects on neurite extension and mRNA gene expression of neural cytoskeletal markers, similar to previous studies. As a result, this work has significant implications for the analysis of biological studies in matrices, as the material and mechanical properties of the hydrogel may be unexpectedly temporally changing during culture due to interactions between peptide signaling elements, underscoring the need for greater matrix characterization during the degradation and cell culture. STATEMENT OF SIGNIFICANCE Greater emulation of the native extracellular matrix is necessary for tissue formation. To achieve this, matrices are becoming more complex, often including multiple bioactive signaling elements. However, peptide signaling in polyethylene glycol matrices and amino acids interactions between peptides can affect hydrogel material and mechanical properties, but are rarely studied. The current study identifies such an interaction between laminin derived peptide, IKVAV, and collagen derived matrix metalloprotease degradable peptide, GPQGIWGQ. Previous studies using these peptides did not identify their interactions' ability to mechanically stabilize the hydrogel during degradation. This work underscores the need for greater matrix characterization and consideration of bioactive signaling element effects temporally on the matrix's material and mechanical properties, as they can contribute to cellular response.
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Affiliation(s)
- Hyun Ju Lim
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, McGovern Medical School at the University of Texas Health Science Center at Houston, United States
| | - Zara Khan
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, McGovern Medical School at the University of Texas Health Science Center at Houston, United States
| | - Xi Lu
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, McGovern Medical School at the University of Texas Health Science Center at Houston, United States
| | - T Hiran Perera
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, McGovern Medical School at the University of Texas Health Science Center at Houston, United States
| | - Thomas S Wilems
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, McGovern Medical School at the University of Texas Health Science Center at Houston, United States
| | - Krishna T Ravivarapu
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, McGovern Medical School at the University of Texas Health Science Center at Houston, United States
| | - Laura A Smith Callahan
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at the University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, The Brown Foundation Institute of Molecular Medicine for the Prevention of Human Diseases, McGovern Medical School at the University of Texas Health Science Center at Houston, United States; The Department of Nanomedicine and Biomedical Engineering, McGovern Medical School at the University of Texas Health Science Center at Houston, United States; The MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, University of Texas Health Science Center at Houston, United States.
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25
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Smith Callahan LA. Gradient Material Strategies for Hydrogel Optimization in Tissue Engineering Applications. High Throughput 2018; 7:E1. [PMID: 29485612 PMCID: PMC5876527 DOI: 10.3390/ht7010001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Revised: 12/30/2017] [Accepted: 01/02/2018] [Indexed: 12/15/2022] Open
Abstract
Although a number of combinatorial/high-throughput approaches have been developed for biomaterial hydrogel optimization, a gradient sample approach is particularly well suited to identify hydrogel property thresholds that alter cellular behavior in response to interacting with the hydrogel due to reduced variation in material preparation and the ability to screen biological response over a range instead of discrete samples each containing only one condition. This review highlights recent work on cell-hydrogel interactions using a gradient material sample approach. Fabrication strategies for composition, material and mechanical property, and bioactive signaling gradient hydrogels that can be used to examine cell-hydrogel interactions will be discussed. The effects of gradients in hydrogel samples on cellular adhesion, migration, proliferation, and differentiation will then be examined, providing an assessment of the current state of the field and the potential of wider use of the gradient sample approach to accelerate our understanding of matrices on cellular behavior.
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Affiliation(s)
- Laura A Smith Callahan
- The Vivian L. Smith Department of Neurosurgery, Center for Stem Cell & Regenerative Medicine, and Department of Nanomedicine and Biomedical Engineering, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
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Laminin-derived Ile-Lys-Val-ala-Val: a promising bioactive peptide in neural tissue engineering in traumatic brain injury. Cell Tissue Res 2017; 371:223-236. [PMID: 29082446 DOI: 10.1007/s00441-017-2717-6] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 10/10/2017] [Indexed: 01/09/2023]
Abstract
The adult brain has a very limited regeneration capacity and there is no effective treatment currently available for brain injury. Neuroprotective drugs aim to reduce the intensity of cell degeneration but do not trigger tissue regeneration. Cell replacement therapy is a novel strategy to overcome brain injury-induced disability. To enhance cell viability and neuronal differentiation, developing bioactive scaffolds combined with stem cells for transplantation is a crucial approach in brain tissue engineering. Cell interactions with the extracellular matrix (ECM) play a vital role in neuronal cell survival, neurite outgrowth, attachment, migration, differentiation, and proliferation. Thus, appropriate cell-ECM interactions are essential when designing and modifying scaffolds for application in neural tissue engineering. To improve cell-ECM interactions, scaffolds can be modified with bioactive peptides. Here, we discuss the characteristic features of laminin-derived Ile-Lys-Val-Ala-Val (IKVAV) sequence as a bio-functional motif in scaffolds and the behavior of stem cells in scaffolds conjugated with the IKVAV peptide. The incorporation of this bioactive peptide in nanofiber scaffolds markedly improves stem cell behavior and may be a potential method for cell replacement therapy in traumatic brain injury.
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Wilems TS, Lu X, Kurosu YE, Khan Z, Lim HJ, Smith Callahan LA. Effects of free radical initiators on polyethylene glycol dimethacrylate hydrogel properties and biocompatibility. J Biomed Mater Res A 2017; 105:3059-3068. [PMID: 28744952 DOI: 10.1002/jbm.a.36160] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 06/22/2017] [Accepted: 07/21/2017] [Indexed: 12/13/2022]
Abstract
Many studies have utilized Irgacure 2959 photopolymerized poly(ethylene glycol) (PEG) hydrogels for tissue engineering application development. Due to the limited penetration of ultraviolet light through tissue, Irgacure 2959 polymerized hydrogels are not suitable for use in tissues where material injection is desirable, such as the spinal cord. To address this, several free radical initiators (thermal initiator VA044, ammonium persulfate (APS)/TEMED reduction-oxidation reaction, and Fenton chemistry) are evaluated for their effects on the material and mechanical properties of PEG hydrogels compared with Irgacure 2959. To emulate the effects of endogenous thiols on in vivo polymerization, the effects of chain transfer agent (CTA) dithiothreitol on gelation rates, material properties, Young's and shear modulus, are examined. Mouse embryonic stem cells and human induced pluripotent stem cell derived neural stem cells were used to investigate the cytocompatibility of each polymerization. VA044 and Fenton chemistry polymerization of PEG hydrogels both had gelation rates and mechanical properties that were highly susceptible to changes in CTA concentration and showed poor cytocompatibility. APS/TEMED polymerized hydrogels maintained consistent gelation rates and mechanical properties at high CTA concentration and had a similar cytocompatibility as Irgacure 2959 when cells were encapsulated within the PEG hydrogels. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 3059-3068, 2017.
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Affiliation(s)
- Thomas S Wilems
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at University of Texas Health Science Center at Houston, Houston, Texas, 77030.,Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas, 77030
| | - Xi Lu
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at University of Texas Health Science Center at Houston, Houston, Texas, 77030.,Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas, 77030
| | - Yuki E Kurosu
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at University of Texas Health Science Center at Houston, Houston, Texas, 77030.,Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas, 77030
| | - Zara Khan
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at University of Texas Health Science Center at Houston, Houston, Texas, 77030.,Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas, 77030
| | - Hyun Ju Lim
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at University of Texas Health Science Center at Houston, Houston, Texas, 77030.,Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas, 77030
| | - Laura A Smith Callahan
- The Vivian L Smith Department of Neurosurgery, McGovern Medical School at University of Texas Health Science Center at Houston, Houston, Texas, 77030.,Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, Texas, 77030.,The Department of Nanomedicine and Biomedical Engineering, McGovern Medical School at University of Texas Health Science Center at Houston, Houston, Texas, 77030.,The University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences, University of Texas Health Science Center at Houston, Houston, Texas, 77030
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Lim HJ, Mosley MC, Kurosu Y, Smith Callahan LA. Concentration dependent survival and neural differentiation of murine embryonic stem cells cultured on polyethylene glycol dimethacrylate hydrogels possessing a continuous concentration gradient of n-cadherin derived peptide His-Ala-Val-Asp-Lle. Acta Biomater 2017; 56:153-160. [PMID: 27915022 DOI: 10.1016/j.actbio.2016.11.063] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2016] [Revised: 11/10/2016] [Accepted: 11/29/2016] [Indexed: 12/31/2022]
Abstract
N-cadherin cell-cell signaling plays a key role in the structure and function of the nervous system. However, few studies have incorporated bioactive signaling from n-cadherin into tissue engineering matrices. The present study uses a continuous gradient approach in polyethylene glycol dimethacrylate hydrogels to identify concentration dependent effects of n-cadherin peptide, His-Ala-Val-Asp-Lle (HAVDI), on murine embryonic stem cell survival and neural differentiation. The n-cadherin peptide was found to affect the expression of pluripotency marker, alkaline phosphatase, in murine embryonic stem cells cultured on n-cadherin peptide containing hydrogels in a concentration dependent manner. Increasing n-cadherin peptide concentrations in the hydrogels elicited a biphasic response in neurite extension length and mRNA expression of neural differentiation marker, neuron-specific class III β-tubulin, in murine embryonic stem cells cultured on the hydrogels. High concentrations of n-cadherin peptide in the hydrogels were found to increase the expression of apoptotic marker, caspase 3/7, in murine embryonic stem cells compared to that of murine embryonic stem cell cultures on hydrogels containing lower concentrations of n-cadherin peptide. Increasing the n-cadherin peptide concentration in the hydrogels facilitated greater survival of murine embryonic stem cells exposed to increasing oxidative stress caused by hydrogen peroxide exposure. The combinatorial approach presented in this work demonstrates concentration dependent effects of n-cadherin signaling on mouse embryonic stem cell behavior, underscoring the need for the greater use of systematic approaches in tissue engineering matrix design in order to understand and optimize bioactive signaling in the matrix for tissue formation. STATEMENT OF SIGNIFICANCE Single cell encapsulation is common in tissue engineering matrices. This eliminates cellular access to cell-cell signaling. N-cadherin, a cell-cell signaling molecule, plays a vital role in the development of neural tissues, but has not been well studied as a bioactive signaling element in neural tissue engineering matrices. The present study uses a systematic continuous gradient approach to identify concentration dependent effects of n-cadherin derived peptide, HAVDI, on the survival and neural differentiation of murine embryonic stem cells. This work underscores the need for greater use to combinatorial strategies to understand the effect complex bioactive signaling, such as n-cadherin, and the need to optimize the concentration of such bioactive signaling within tissue engineering matrices for maximal cellular response.
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Affiliation(s)
- Hyun Ju Lim
- The Vivian L. Smith Department of Neurosurgery, McGovern Medical School at The University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston, United States
| | - Matthew C Mosley
- The Vivian L. Smith Department of Neurosurgery, McGovern Medical School at The University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston, United States
| | - Yuki Kurosu
- The Vivian L. Smith Department of Neurosurgery, McGovern Medical School at The University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston, United States
| | - Laura A Smith Callahan
- The Vivian L. Smith Department of Neurosurgery, McGovern Medical School at The University of Texas Health Science Center at Houston, United States; Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, The University of Texas Health Science Center at Houston, United States; The Department of Nanomedicine and Biomedical Engineering, University of Texas Health Science Center at Houston, United States; The Graduate School of Biomedical Sciences, University of Texas Health Science Center at Houston, United States.
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Lim HJ, Khan Z, Wilems TS, Lu X, Perera TH, Kurosu YE, Ravivarapu KT, Mosley MC, Smith Callahan LA. Human Induced Pluripotent Stem Cell Derived Neural Stem Cell Survival and Neural Differentiation on Polyethylene Glycol Dimethacrylate Hydrogels Containing a Continuous Concentration Gradient of N-Cadherin Derived Peptide His-Ala-Val-Asp-Ile. ACS Biomater Sci Eng 2017; 3:776-781. [DOI: 10.1021/acsbiomaterials.6b00745] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Hyun Ju Lim
- The
Vivian L. Smith Department of Neurosurgery and Center for Stem Cells
and Regenerative Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, 1825 Pressler, Houston, Texas 77030, United States
| | - Zara Khan
- The
Vivian L. Smith Department of Neurosurgery and Center for Stem Cells
and Regenerative Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, 1825 Pressler, Houston, Texas 77030, United States
| | - Thomas S. Wilems
- The
Vivian L. Smith Department of Neurosurgery and Center for Stem Cells
and Regenerative Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, 1825 Pressler, Houston, Texas 77030, United States
| | - Xi Lu
- The
Vivian L. Smith Department of Neurosurgery and Center for Stem Cells
and Regenerative Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, 1825 Pressler, Houston, Texas 77030, United States
| | - T. Hiran Perera
- The
Vivian L. Smith Department of Neurosurgery and Center for Stem Cells
and Regenerative Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, 1825 Pressler, Houston, Texas 77030, United States
| | - Yuki E. Kurosu
- The
Vivian L. Smith Department of Neurosurgery and Center for Stem Cells
and Regenerative Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, 1825 Pressler, Houston, Texas 77030, United States
| | - Krishna T. Ravivarapu
- The
Vivian L. Smith Department of Neurosurgery and Center for Stem Cells
and Regenerative Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, 1825 Pressler, Houston, Texas 77030, United States
| | - Matthew C. Mosley
- The
Vivian L. Smith Department of Neurosurgery and Center for Stem Cells
and Regenerative Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, 1825 Pressler, Houston, Texas 77030, United States
| | - Laura A. Smith Callahan
- The
Vivian L. Smith Department of Neurosurgery and Center for Stem Cells
and Regenerative Medicine, McGovern Medical School at the University of Texas Health Science Center at Houston, 1825 Pressler, Houston, Texas 77030, United States
- Department
of Nanomedicine and Biomedical Engineering, McGovern Medical School at the University of Texas Health Science Center at Houston, 1825 Pressler, Houston, Texas 77030, United States
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Mosley MC, Lim HJ, Chen J, Yang YH, Li S, Liu Y, Smith Callahan LA. Neurite extension and neuronal differentiation of human induced pluripotent stem cell derived neural stem cells on polyethylene glycol hydrogels containing a continuous Young's Modulus gradient. J Biomed Mater Res A 2016; 105:824-833. [DOI: 10.1002/jbm.a.35955] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 10/28/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Matthew C. Mosley
- The Vivian L Smith Department of Neurosurgery; McGovern Medical School at University of Texas Health Science Center at Houston; Houston Texas 77030
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston; Houston Texas 77030
| | - Hyun Ju Lim
- The Vivian L Smith Department of Neurosurgery; McGovern Medical School at University of Texas Health Science Center at Houston; Houston Texas 77030
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston; Houston Texas 77030
| | - Jing Chen
- The Vivian L Smith Department of Neurosurgery; McGovern Medical School at University of Texas Health Science Center at Houston; Houston Texas 77030
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston; Houston Texas 77030
| | - Yueh-Hsun Yang
- The Vivian L Smith Department of Neurosurgery; McGovern Medical School at University of Texas Health Science Center at Houston; Houston Texas 77030
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston; Houston Texas 77030
| | - Shenglan Li
- The Vivian L Smith Department of Neurosurgery; McGovern Medical School at University of Texas Health Science Center at Houston; Houston Texas 77030
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston; Houston Texas 77030
| | - Ying Liu
- The Vivian L Smith Department of Neurosurgery; McGovern Medical School at University of Texas Health Science Center at Houston; Houston Texas 77030
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston; Houston Texas 77030
| | - Laura A. Smith Callahan
- The Vivian L Smith Department of Neurosurgery; McGovern Medical School at University of Texas Health Science Center at Houston; Houston Texas 77030
- Center for Stem Cell and Regenerative Medicine, Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston; Houston Texas 77030
- The Department of Nanomedicine and Biomedical Engineering; McGovern Medical School at University of Texas Health Science Center at Houston; Houston Texas 77030
- The Graduate School of Biomedical Sciences; University of Texas Health Science Center at Houston; Houston Texas 77030
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Combination of a peptide-modified gellan gum hydrogel with cell therapy in a lumbar spinal cord injury animal model. Biomaterials 2016; 105:38-51. [PMID: 27505621 DOI: 10.1016/j.biomaterials.2016.07.019] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Revised: 07/09/2016] [Accepted: 07/16/2016] [Indexed: 12/30/2022]
Abstract
Spinal Cord Injury (SCI) is a highly incapacitating condition for which there is still no cure. Current clinical approaches are mainly based on palliative care, so there is a need to find possible treatments to SCI. Cellular transplantation is regarded with great expectation due to the therapeutic potential of cells such as Adipose tissue-derived Stromal/Stem Cells (ASCs) or Olfactory Ensheathing Cells (OECs). Both are accessible sources and present positive paracrine and cell-to-cell interactions, previously reported by our group. Additionally, biomaterials such as hydrogels have been applied in SCI repair with promising results. We propose to combine a GRGDS-modified gellan gum hydrogel with ASCs and OECs in order to promote SCI regeneration. In vitro, ASCs and OECs could be co-cultured within GG-GRGDS hydrogels inducing a more robust neurite outgrowth when compared to controls. In vivo experiments in a hemisection SCI rat model revealed that the administration of ASCs and OECs encapsulated in a GG-GRGDS hydrogel led to significant motor improvements when compared to both control (SCI) and hydrogel alone (GG-GRGDS) groups. This was accompanied by a decreased infiltration of inflammatory cells and astrocytes, and by an increased intensity of neurofilament. These results suggest evident gains induced by the encapsulation of ASCs and OECs in GG-GRGDS based hydrogels.
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Zhang N, Luo Y, He L, Zhou L, Wu W. A self-assembly peptide nanofibrous scaffold reduces inflammatory response and promotes functional recovery in a mouse model of intracerebral hemorrhage. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2016; 12:1205-17. [DOI: 10.1016/j.nano.2015.12.387] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/08/2015] [Accepted: 12/30/2015] [Indexed: 10/22/2022]
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Smith Callahan LA. Combinatorial Method/High Throughput Strategies for Hydrogel Optimization in Tissue Engineering Applications. Gels 2016; 2:E18. [PMID: 30674150 PMCID: PMC6318679 DOI: 10.3390/gels2020018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 06/01/2016] [Accepted: 06/03/2016] [Indexed: 12/22/2022] Open
Abstract
Combinatorial method/high throughput strategies, which have long been used in the pharmaceutical industry, have recently been applied to hydrogel optimization for tissue engineering applications. Although many combinatorial methods have been developed, few are suitable for use in tissue engineering hydrogel optimization. Currently, only three approaches (design of experiment, arrays and continuous gradients) have been utilized. This review highlights recent work with each approach. The benefits and disadvantages of design of experiment, array and continuous gradient approaches depending on study objectives and the general advantages of using combinatorial methods for hydrogel optimization over traditional optimization strategies will be discussed. Fabrication considerations for combinatorial method/high throughput samples will additionally be addressed to provide an assessment of the current state of the field, and potential future contributions to expedited material optimization and design.
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Affiliation(s)
- Laura A Smith Callahan
- Vivian L. Smith Department of Neurosurgery & Center for Stem Cells and Regenerative Medicine McGovern Medical School at the University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
- Department of Nanomedicine and Biomedical Engineering, McGovern Medical School at the University of Texas Health Science Center at Houston, Houston, TX 77030, USA.
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Stukel JM, Willits RK. Mechanotransduction of Neural Cells Through Cell-Substrate Interactions. TISSUE ENGINEERING PART B-REVIEWS 2016; 22:173-82. [PMID: 26669274 DOI: 10.1089/ten.teb.2015.0380] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Neurons and neural stem cells are sensitive to their mechanical and topographical environment, and cell-substrate binding contributes to this sensitivity to activate signaling pathways for basic cell functions. Many transmembrane proteins transmit signals into and out of the cell, including integrins, growth factor receptors, G-protein-coupled receptors, cadherins, cell adhesion molecules, and ion channels. Specifically, integrins are one of the main transmembrane proteins that transmit force across the cell membrane between a cell and its extracellular matrix, making them critical in the study of cell-material interactions. This review focuses on mechanotransduction, defined as the conversion of force a cell generates through cell-substrate bonds to a chemical signal, of neural cells. The chemical signals relay information via pathways through the cellular cytoplasm to the nucleus, where signaling events can affect gene expression. Pathways and the cellular response initiated by substrate binding are explored to better understand their effect on neural cells mechanotransduction. As the results of mechanotransduction affect cell adhesion, cell shape, and differentiation, knowledge regarding neural mechanotransduction is critical for most regenerative strategies in tissue engineering, where novel environments are developed to improve conduit design for central and peripheral nervous system repair in vivo.
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Affiliation(s)
- Jessica M Stukel
- Department of Biomedical Engineering, The University of Akron , Akron, Ohio
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Lim HJ, Perera TH, Wilems TS, Ghosh S, Zheng YY, Azhdarinia A, Cao Q, Smith Callahan LA. Response to di-functionalized hyaluronic acid with orthogonal chemistry grafting at independent modification sites in rodent models of neural differentiation and spinal cord injury. J Mater Chem B 2016; 4:6865-6875. [DOI: 10.1039/c6tb01906d] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Hyaluronic acid functionalized with two orthogonal chemistries at different targets expedites neural maturation in vitro, while reducing inflammation in vivo.
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Affiliation(s)
- Hyun Ju Lim
- Vivian L. Smith Department of Neurosurgery
- McGovern Medical School at University of Texas Health Science Center at Houston
- Houston
- USA
- Center for Stem Cell and Regenerative Medicine
| | - T. Hiran Perera
- Vivian L. Smith Department of Neurosurgery
- McGovern Medical School at University of Texas Health Science Center at Houston
- Houston
- USA
- Center for Stem Cell and Regenerative Medicine
| | - Thomas S. Wilems
- Vivian L. Smith Department of Neurosurgery
- McGovern Medical School at University of Texas Health Science Center at Houston
- Houston
- USA
- Center for Stem Cell and Regenerative Medicine
| | - Sukhen Ghosh
- Center for Molecular Imaging
- Brown Foundation Institute of Molecular Medicine
- University of Texas Health Science Center at Houston
- Houston
- USA
| | - Yi-Yan Zheng
- Vivian L. Smith Department of Neurosurgery
- McGovern Medical School at University of Texas Health Science Center at Houston
- Houston
- USA
- Center for Stem Cell and Regenerative Medicine
| | - Ali Azhdarinia
- Center for Molecular Imaging
- Brown Foundation Institute of Molecular Medicine
- University of Texas Health Science Center at Houston
- Houston
- USA
| | - Qilin Cao
- Vivian L. Smith Department of Neurosurgery
- McGovern Medical School at University of Texas Health Science Center at Houston
- Houston
- USA
- Center for Stem Cell and Regenerative Medicine
| | - Laura A. Smith Callahan
- Vivian L. Smith Department of Neurosurgery
- McGovern Medical School at University of Texas Health Science Center at Houston
- Houston
- USA
- Center for Stem Cell and Regenerative Medicine
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Smith Callahan LA. The concentration game: differential effects of bioactive signaling in 2D and 3D culture. Neural Regen Res 2016; 11:66-8. [PMID: 26981082 PMCID: PMC4774229 DOI: 10.4103/1673-5374.165303] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/26/2015] [Indexed: 01/05/2023] Open
Affiliation(s)
- Laura A. Smith Callahan
- The Vivian L. Smith Department of Neurosurgery & Center for Stem Cell and Regenerative Medicine, University of Texas Health Science Center at Houston, Houston, TX, USA
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