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Litowczenko J, Wychowaniec JK, Załęski K, Marczak Ł, Edwards-Gayle CJC, Tadyszak K, Maciejewska BM. Micro/nano-patterns for enhancing differentiation of human neural stem cells and fabrication of nerve conduits via soft lithography and 3D printing. BIOMATERIALS ADVANCES 2023; 154:213653. [PMID: 37862812 DOI: 10.1016/j.bioadv.2023.213653] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/02/2023] [Accepted: 10/06/2023] [Indexed: 10/22/2023]
Abstract
Topographical cues on materials can manipulate cellular fate, particularly for neural cells that respond well to such cues. Utilizing biomaterial surfaces with topographical features can effectively influence neuronal differentiation and promote neurite outgrowth. This is crucial for improving the regeneration of damaged neural tissue after injury. Here, we utilized groove patterns to create neural conduits that promote neural differentiation and axonal growth. We investigated the differentiation of human neural stem cells (NSCs) on silicon dioxide groove patterns with varying height-to-width/spacing ratios. We hypothesize that NSCs can sense the microgrooves with nanoscale depth on different aspect ratio substrates and exhibit different morphologies and differentiation fate. A comprehensive approach was employed, analyzing cell morphology, neurite length, and cell-specific markers. These aspects provided insights into the behavior of the investigated NSCs and their response to the topographical cues. Three groove-pattern models were designed with varying height-to-width/spacing ratios of 80, 42, and 30 for groove pattern widths of 1 μm, 5 μm, and 10 μm and nanoheights of 80 nm, 210 nm, and 280 nm. Smaller groove patterns led to longer neurites and more effective differentiation towards neurons, whereas larger patterns promoted multidimensional differentiation towards both neurons and glia. We transferred these cues onto patterned polycaprolactone (PCL) and PCL-graphene oxide (PCL-GO) composite 'stamps' using simple soft lithography and reproducible extrusion 3D printing methods. The patterned scaffolds elicited a response from NSCs comparable to that of silicon dioxide groove patterns. The smallest pattern stimulated the highest neurite outgrowth, while the middle-sized grooves of PCL-GO induced effective synaptogenesis. We demonstrated the potential for such structures to be wrapped into tubes and used as grafts for peripheral nerve regeneration. Grooved PCL and PCL-GO conduits could be a promising alternative to nerve grafting.
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Affiliation(s)
- Jagoda Litowczenko
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, PL61614 Poznań, Poland.
| | - Jacek K Wychowaniec
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, PL61614 Poznań, Poland; AO Research Institute Davos, Clavadelerstrasse 8, 7270 Davos, Switzerland
| | - Karol Załęski
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, PL61614 Poznań, Poland
| | - Łukasz Marczak
- European Centre for Bioinformatics and Genomics, Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznań, Poland
| | | | - Krzysztof Tadyszak
- Institute of Macromolecular Chemistry, CAS, Heyrovského nám. 2, 162 06 Prague 6, Czech Republic
| | - Barbara M Maciejewska
- NanoBioMedical Centre, Adam Mickiewicz University, Wszechnicy Piastowskiej 3, PL61614 Poznań, Poland
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2
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Nie L, Yao D, Chen S, Wang J, Pan C, Wu D, Liu N, Tang Z. Directional induction of neural stem cells, a new therapy for neurodegenerative diseases and ischemic stroke. Cell Death Discov 2023; 9:215. [PMID: 37393356 DOI: 10.1038/s41420-023-01532-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/16/2023] [Accepted: 06/22/2023] [Indexed: 07/03/2023] Open
Abstract
Due to the limited capacity of the adult mammalian brain to self-repair and regenerate, neurological diseases, especially neurodegenerative disorders and stroke, characterized by irreversible cellular damage are often considered as refractory diseases. Neural stem cells (NSCs) play a unique role in the treatment of neurological diseases for their abilities to self-renew and form different neural lineage cells, such as neurons and glial cells. With the increasing understanding of neurodevelopment and advances in stem cell technology, NSCs can be obtained from different sources and directed to differentiate into a specific neural lineage cell phenotype purposefully, making it possible to replace specific cells lost in some neurological diseases, which provides new approaches to treat neurodegenerative diseases as well as stroke. In this review, we outline the advances in generating several neuronal lineage subtypes from different sources of NSCs. We further summarize the therapeutic effects and possible therapeutic mechanisms of these fated specific NSCs in neurological disease models, with special emphasis on Parkinson's disease and ischemic stroke. Finally, from the perspective of clinical translation, we compare the strengths and weaknesses of different sources of NSCs and different methods of directed differentiation, and propose future research directions for directed differentiation of NSCs in regenerative medicine.
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Affiliation(s)
- Luwei Nie
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Dabao Yao
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Shiling Chen
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Jingyi Wang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Chao Pan
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Dongcheng Wu
- Department of Biochemistry and Molecular Biology, Wuhan University School of Basic Medical Sciences, Wuhan, 430030, China
- Wuhan Hamilton Biotechnology Co., Ltd., Wuhan, 430030, China
| | - Na Liu
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
| | - Zhouping Tang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
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Han Y, Seyfried D, Meng Y, Yang D, Schultz L, Chopp M, Seyfried D. Multipotent mesenchymal stromal cell-derived exosomes improve functional recovery after experimental intracerebral hemorrhage in the rat. J Neurosurg 2019; 131:290-300. [PMID: 30028267 DOI: 10.3171/2018.2.jns171475] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2017] [Accepted: 02/16/2018] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Previous studies have demonstrated that transplanted multipotent mesenchymal stromal cells (MSCs) improve functional recovery in rats after experimental intracerebral hemorrhage (ICH). In this study the authors tested the hypothesis that administration of multipotent MSC-derived exosomes promotes functional recovery, neurovascular remodeling, and neurogenesis in a rat model of ICH. METHODS Sixteen adult male Wistar rats were subjected to ICH via blood injection into the striatum, followed 24 hours later by tail vein injection of 100 μg protein of MSC-derived exosomes (treatment group, 8 rats) or an equal volume of vehicle (control group, 8 rats); an additional 8 rats that had identical surgery without blood infusion were used as a sham group. The modified Morris water maze (mMWM), modified Neurological Severity Score (mNSS), and social odor-based novelty recognition tests were performed to evaluate cognitive and sensorimotor functional recovery after ICH. All 24 animals were killed 28 days after ICH or sham procedure. Histopathological and immunohistochemical analyses were performed for measurements of lesion volume and neurovascular and white matter remodeling. RESULTS Compared with the saline-treated controls, exosome-treated ICH rats showed significant improvement in the neurological function of spatial learning and motor recovery measured at 26-28 days by mMWM and starting at day 14 by mNSS (p < 0.05). Senorimotor functional improvement was measured by a social odor-based novelty recognition test (p < 0.05). Exosome treatment significantly increased newly generated endothelial cells in the hemorrhagic boundary zone, neuroblasts and mature neurons in the subventricular zone, and myelin in the striatum without altering the lesion volume. CONCLUSIONS MSC-derived exosomes effectively improve functional recovery after ICH, possibly by promoting endogenous angiogenesis and neurogenesis in rats after ICH. Thus, cell-free, MSC-derived exosomes may be a novel therapy for ICH.
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Affiliation(s)
| | | | | | | | - Lonni Schultz
- 3Public Health Sciences, Henry Ford Hospital, Detroit, Michigan
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Chooi WH, Ong W, Murray A, Lin J, Nizetic D, Chew SY. Scaffold mediated gene knockdown for neuronal differentiation of human neural progenitor cells. Biomater Sci 2018; 6:3019-3029. [PMID: 30277233 DOI: 10.1039/c8bm01034j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
The use of human induced pluripotent stem cell-derived neural progenitor cells (hiPSC-NPCs) is an attractive therapeutic option for damaged nerve tissues. To direct neuronal differentiation of stem cells, we have previously developed an electrospun polycaprolactone nanofiber scaffold that was functionalized with siRNA targeting Re-1 silencing transcription factor (REST), by mussel-inspired bioadhesive coating. However, the efficacy of nanofiber-mediated RNA interference on hiPSC-NPCs differentiation remains unknown. Furthermore, interaction between such cell-seeded scaffolds with injured tissues has not been tested. In this study, scaffolds were optimized for REST knockdown in hiPSC-NPCs to enhance neuronal differentiation. Specifically, the effects of two different mussel-inspired bioadhesives and transfection reagents were analyzed. Scaffolds functionalized with RNAiMAX Lipofectamine-siREST complexes enhanced the differentiation of hiPSC-NPCs into TUJ1+ cells (60% as compared to 22% in controls with scrambled siNEG after 9 days) without inducing high cytotoxicity. When cell-seeded scaffolds were transplanted to transected spinal cord organotypic slices, similar efficiency in neuronal differentiation was observed. The scaffolds also supported the migration of cells and neurite outgrowth from the spinal cord slices. Taken together, the results suggest that this scaffold can be effective in enhancing hiPSC-NPC neuronal commitment by gene-silencing for the treatment of injured spinal cords.
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Affiliation(s)
- Wai Hon Chooi
- School of Chemical & Biomedical Engineering, Nanyang Technological University, 637459 Singapore. sychew.ntu.edu.sg
| | - William Ong
- School of Chemical & Biomedical Engineering, Nanyang Technological University, 637459 Singapore. sychew.ntu.edu.sg
| | - Aoife Murray
- Lee Kong Chian School of Medicine, Nanyang Technological University, 308232 Singapore
| | - Junquan Lin
- School of Chemical & Biomedical Engineering, Nanyang Technological University, 637459 Singapore. sychew.ntu.edu.sg
| | - Dean Nizetic
- Lee Kong Chian School of Medicine, Nanyang Technological University, 308232 Singapore
| | - Sing Yian Chew
- School of Chemical & Biomedical Engineering, Nanyang Technological University, 637459 Singapore. sychew.ntu.edu.sg and Lee Kong Chian School of Medicine, Nanyang Technological University, 308232 Singapore
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5
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Directing neuronal cell fate in vitro : Achievements and challenges. Prog Neurobiol 2018; 168:42-68. [DOI: 10.1016/j.pneurobio.2018.04.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2017] [Revised: 03/30/2018] [Accepted: 04/05/2018] [Indexed: 12/22/2022]
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6
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Zhang B, Yan W, Zhu Y, Yang W, Le W, Chen B, Zhu R, Cheng L. Nanomaterials in Neural-Stem-Cell-Mediated Regenerative Medicine: Imaging and Treatment of Neurological Diseases. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1705694. [PMID: 29543350 DOI: 10.1002/adma.201705694] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Revised: 11/17/2017] [Indexed: 05/24/2023]
Abstract
Patients are increasingly being diagnosed with neuropathic diseases, but are rarely cured because of the loss of neurons in damaged tissues. This situation creates an urgent clinical need to develop alternative treatment strategies for effective repair and regeneration of injured or diseased tissues. Neural stem cells (NSCs), highly pluripotent cells with the ability of self-renewal and potential for multidirectional differentiation, provide a promising solution to meet this demand. However, some serious challenges remaining to be addressed are the regulation of implanted NSCs, tracking their fate, monitoring their interaction with and responsiveness to the tissue environment, and evaluating their treatment efficacy. Nanomaterials have been envisioned as innovative components to further empower the field of NSC-based regenerative medicine, because their unique physicochemical characteristics provide unparalleled solutions to the imaging and treatment of diseases. By building on the advantages of nanomaterials, tremendous efforts have been devoted to facilitate research into the clinical translation of NSC-based therapy. Here, recent work on emerging nanomaterials is highlighted and their performance in the imaging and treatment of neurological diseases is evaluated, comparing the strengths and weaknesses of various imaging modalities currently used. The underlying mechanisms of therapeutic efficacy are discussed, and future research directions are suggested.
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Affiliation(s)
- Bingbo Zhang
- Institute of Photomedicine, Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai, 200443, China
- Department of Spine Surgery, Tongji Hospital, Institute of Spine and Spinal Cord Injury, Tongji University School of Medicine, Tongji University, Shanghai, 200065, China
| | - Wei Yan
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Laboratory of Green Preparation and Application for Functional Materials, Ministry of Education, School of Materials Science & Engineering, Hubei University, Wuhan, 430062, China
| | - Yanjing Zhu
- Department of Spine Surgery, Tongji Hospital, Institute of Spine and Spinal Cord Injury, Tongji University School of Medicine, Tongji University, Shanghai, 200065, China
| | - Weitao Yang
- Institute of Photomedicine, Shanghai Skin Disease Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai, 200443, China
| | - Wenjun Le
- Institute for Regenerative Medicine, Shanghai East Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai, 200443, China
| | - Bingdi Chen
- Institute for Regenerative Medicine, Shanghai East Hospital, The Institute for Biomedical Engineering & Nano Science, Tongji University School of Medicine, Shanghai, 200443, China
| | - Rongrong Zhu
- Department of Spine Surgery, Tongji Hospital, Institute of Spine and Spinal Cord Injury, Tongji University School of Medicine, Tongji University, Shanghai, 200065, China
| | - Liming Cheng
- Department of Spine Surgery, Tongji Hospital, Institute of Spine and Spinal Cord Injury, Tongji University School of Medicine, Tongji University, Shanghai, 200065, China
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7
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Hou XQ, Wang L, Wang FG, Zhao XM, Zhang HT. Combination of RNA Interference and Stem Cells for Treatment of Central Nervous System Diseases. Genes (Basel) 2017; 8:genes8050135. [PMID: 28481269 PMCID: PMC5448009 DOI: 10.3390/genes8050135] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 04/27/2017] [Accepted: 04/28/2017] [Indexed: 12/31/2022] Open
Abstract
RNA interference (RNAi), including microRNAs, is an important player in the mediation of differentiation and migration of stem cells via target genes. It is used as a potential strategy for gene therapy for central nervous system (CNS) diseases. Stem cells are considered vectors of RNAi due to their capacity to deliver RNAi to other cells. In this review, we discuss the recent advances in studies of RNAi pathways in controlling neuronal differentiation and migration of stem cells. We also highlight the utilization of a combination of RNAi and stem cells in treatment of CNS diseases.
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Affiliation(s)
- Xue-Qin Hou
- Institute of Pharmacology, Taishan Medical University, Taian 271016, Shandong, China.
| | - Lei Wang
- Institute of Pharmacology, Taishan Medical University, Taian 271016, Shandong, China.
| | - Fu-Gang Wang
- Institute of Pharmacology, Taishan Medical University, Taian 271016, Shandong, China.
| | - Xiao-Min Zhao
- Institute of Pharmacology, Taishan Medical University, Taian 271016, Shandong, China.
| | - Han-Ting Zhang
- Institute of Pharmacology, Taishan Medical University, Taian 271016, Shandong, China.
- Departments of Behavioral Medicine & Psychiatry and Physiology & Pharmacology, Blanchette Rockefeller Neurosciences Institute, West Virginia University Health Sciences Center, Morgantown, WV 26506, USA.
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8
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André EM, Passirani C, Seijo B, Sanchez A, Montero-Menei CN. Nano and microcarriers to improve stem cell behaviour for neuroregenerative medicine strategies: Application to Huntington's disease. Biomaterials 2016; 83:347-62. [DOI: 10.1016/j.biomaterials.2015.12.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 12/09/2015] [Accepted: 12/13/2015] [Indexed: 12/22/2022]
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9
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André EM, Pensado A, Resnier P, Braz L, Rosa da Costa AM, Passirani C, Sanchez A, Montero-Menei CN. Characterization and comparison of two novel nanosystems associated with siRNA for cellular therapy. Int J Pharm 2015; 497:255-67. [PMID: 26617318 DOI: 10.1016/j.ijpharm.2015.11.020] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 11/08/2015] [Accepted: 11/09/2015] [Indexed: 12/16/2022]
Abstract
To direct stem cell fate, a delicate control of gene expression through small interference RNA (siRNA) is emerging as a new and safe promising strategy. In this way, the expression of proteins hindering neuronal commitment may be transiently inhibited thus driving differentiation. Mesenchymal stem cells (MSC), which secrete tissue repair factors, possess immunomodulatory properties and may differentiate towards the neuronal lineage, are a promising cell source for cell therapy studies in the central nervous system. To better drive their neuronal commitment the repressor Element-1 silencing transcription (REST) factor, may be inhibited by siRNA technology. The design of novel nanoparticles (NP) capable of safely delivering nucleic acids is crucial in order to successfully develop this strategy. In this study we developed and characterized two different siRNA NP. On one hand, sorbitan monooleate (Span(®)80) based NP incorporating the cationic components poly-l-arginine or cationized pullulan, thus allowing the association of siRNA were designed. These NP presented a small size (205 nm) and a negative surface charge (-38 mV). On the other hand, lipid nanocapsules (LNC) associating polymers with lipids and allowing encapsulation of siRNA complexed with lipoplexes were also developed. Their size was of 82 nm with a positive surface charge of +7 mV. Both NP could be frozen with appropriate cryoprotectors. Cytotoxicity and transfection efficiency at different siRNA doses were monitored by evaluating REST expression. An inhibition of around 60% of REST expression was observed with both NP when associating 250 ng/mL of siRNA-REST, as recommended for commercial reagents. Span NP were less toxic for human MSCs than LNCs, but although both NP showed a similar inhibition of REST over time and the induction of neuronal commitment, LNC-siREST induced a higher expression of neuronal markers. Therefore, two different tailored siRNA NP offering great potential for human stem cell differentiation have been developed, encouraging the pursuit of further in vitro and in vivo in studies.
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Affiliation(s)
- E M André
- PRES LUNAM-University of Angers, F-49933 Angers, France; INSERM U1066-Micro et Nanomédecines Biomimétiques, 4 rue larrey, F-49933 Angers, France
| | - A Pensado
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain
| | - P Resnier
- PRES LUNAM-University of Angers, F-49933 Angers, France; INSERM U1066-Micro et Nanomédecines Biomimétiques, 4 rue larrey, F-49933 Angers, France
| | - L Braz
- CIQA-Algarve Chemistry Research Centre, University of Algarve, 8005-139 Faro, Portugal; School of Health-University of Algarve, 8000-510 Faro, Portugal; Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Porto, 4050-313 Porto, Portugal
| | - A M Rosa da Costa
- CIQA-Algarve Chemistry Research Centre, University of Algarve, 8005-139 Faro, Portugal; Department of Chemistry and Pharmacy, Faculty of Science and Technology, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal
| | - C Passirani
- PRES LUNAM-University of Angers, F-49933 Angers, France; INSERM U1066-Micro et Nanomédecines Biomimétiques, 4 rue larrey, F-49933 Angers, France
| | - A Sanchez
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, 15782 Santiago de Compostela, Spain; Molecular Image Group. Health Research Institute-University Clinical Hospital of Santiago de Compostela (IDIS), A Choupana, 15706 Santiago de Compostela, Spain
| | - C N Montero-Menei
- PRES LUNAM-University of Angers, F-49933 Angers, France; INSERM U1066-Micro et Nanomédecines Biomimétiques, 4 rue larrey, F-49933 Angers, France.
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10
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Low WC, Rujitanaroj PO, Lee DK, Kuang J, Messersmith PB, Chan JKY, Chew SY. Mussel-Inspired Modification of Nanofibers for REST siRNA Delivery: Understanding the Effects of Gene-Silencing and Substrate Topography on Human Mesenchymal Stem Cell Neuronal Commitment. Macromol Biosci 2015; 15:1457-68. [DOI: 10.1002/mabi.201500101] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2015] [Revised: 05/05/2015] [Indexed: 11/10/2022]
Affiliation(s)
- Wei Ching Low
- School of Chemical and Biomedical Engineering; Nanyang Technological University; Singapore 637459
| | - Pim-On Rujitanaroj
- School of Chemical and Biomedical Engineering; Nanyang Technological University; Singapore 637459
| | - Dong-Keun Lee
- Department of Biomedical Engineering; Northwestern University, Evanston; Illinois 60208, USA
| | - Jinghao Kuang
- Department of Biomedical Engineering; Northwestern University, Evanston; Illinois 60208, USA
| | - Phillip B. Messersmith
- Department of Biomedical Engineering; Northwestern University, Evanston; Illinois 60208, USA
| | - Jerry Kok Yen Chan
- Department of Reproductive Medicine; KK Women's and Children's Hospital; 100 Bukit Timah Road Singapore 229899
| | - Sing Yian Chew
- School of Chemical and Biomedical Engineering; Nanyang Technological University; Singapore 637459
- Lee Kong Chian School of Medicine; Nanyang Technological University; Singapore 308232
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11
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Yau WWY, Long H, Gauthier NC, Chan JKY, Chew SY. The effects of nanofiber diameter and orientation on siRNA uptake and gene silencing. Biomaterials 2014; 37:94-106. [PMID: 25453941 DOI: 10.1016/j.biomaterials.2014.10.003] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2014] [Accepted: 10/02/2014] [Indexed: 02/07/2023]
Abstract
While substrate topography influences cell behavior, RNA interference (RNAi) has also emerged as a potent method for understanding and directing cell fate. However, the effects of substrate topography on RNAi remain poorly understood. Here, we report the influence of nanofiber architecture on siRNA-mediated gene-silencing in human somatic and stem cells. The respective model cells, human dermal fibroblasts (HDFs) and mesenchymal stem cells (MSCs), were cultured onto aligned or randomly oriented electrospun poly(ε-caprolactone) fibers of different average diameters (300 nm, 700 nm and 1.3 μm). In HDFs, decreasing fiber diameter from 1.3 μm to 300 nm improved Glyceraldehyde 3-phosphate dehydrogenase (GAPDH) and Collagen-I silencing efficiencies by ∼ 3.8 and ∼4.4 folds respectively (p < 0.05) while the effective siRNA uptake pathway was altered from clathrin-dependent endocytosis to macropinocytosis. In MSCs, aligned fibers generated significantly higher level of gene silencing of RE-1 silencing transcription factor (REST) and green fluorescent protein (GFP) (∼1.6 and ∼1.5 folds respectively, p < 0.05), than randomly-oriented fibers. Aligned fiber topography facilitated functional siRNA uptake through clathrin-mediated endocytosis and membrane fusion. Taken together, our results demonstrated a promising role of three-dimensional fibrous scaffolds in modulating siRNA-mediated gene-silencing and established the critical synergistic role of these substrates in modulating cellular behavior by RNAi.
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Affiliation(s)
- Winifred Wing Yiu Yau
- Division of Chemical and Biomolecular Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Hongyan Long
- Division of Chemical and Biomolecular Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore
| | - Nils C Gauthier
- Mechanobiology Institute, National University of Singapore, 5A Engineering Drive 1, Singapore 117411, Singapore
| | - Jerry Kok Yen Chan
- Department of Obstetrics and Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore 119074, Singapore; Department of Reproductive Medicine, KK Women's and Children's Hospital, Singapore 229899, Singapore; Cancer and Stem Cell Biology, Duke-NUS Graduate Medical School, Singapore 169857, Singapore
| | - Sing Yian Chew
- Division of Chemical and Biomolecular Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore 637459, Singapore; Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore 308232, Singapore.
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12
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Chua CEL, Goh ELK, Tang BL. Rab31 is expressed in neural progenitor cells and plays a role in their differentiation. FEBS Lett 2014; 588:3186-94. [PMID: 24999186 DOI: 10.1016/j.febslet.2014.06.060] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Revised: 06/16/2014] [Accepted: 06/27/2014] [Indexed: 12/16/2022]
Abstract
Rab31 is expressed in both GFAP- and nestin- positive fibres in regions of neurogenic potential in the adult mouse brain. To investigate the role of Rab31 in neural progenitor cells (NPCs), we cultured NPCs and found significant levels of Rab31 expression in these cells. Rab31 levels showed a sharp initial decrease and then reappeared gradually in a subpopulation of astrocytes when NPCs were induced to differentiate. Silencing of Rab31 hindered, while overexpression enhanced, the differentiation of NPCs to astrocytes. Our results suggest a previously unrecognised role for Rab31 in influencing the differentiation and fate of NPCs.
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Affiliation(s)
- Christelle En Lin Chua
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University Health System, 8 Medical Drive, Singapore 117597, Singapore; NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 8 Medical Drive, Singapore 117597, Singapore.
| | - Eyleen Lay Keow Goh
- Program in Neuroscience and Behavioural Disorder, Duke-NUS Graduate Medical School, 8 College Road, Singapore 169857, Singapore
| | - Bor Luen Tang
- Department of Biochemistry, Yong Loo Lin School of Medicine, National University Health System, 8 Medical Drive, Singapore 117597, Singapore; NUS Graduate School for Integrative Sciences and Engineering, National University of Singapore, 8 Medical Drive, Singapore 117597, Singapore.
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13
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Low WC, Rujitanaroj PO, Lee DK, Messersmith PB, Stanton LW, Goh E, Chew SY. Nanofibrous scaffold-mediated REST knockdown to enhance neuronal differentiation of stem cells. Biomaterials 2013; 34:3581-90. [PMID: 23415645 DOI: 10.1016/j.biomaterials.2013.01.093] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 01/26/2013] [Indexed: 02/06/2023]
Abstract
At present, the recovery prospect for patients with chronic neurodegenerative diseases or acute trauma in the central nervous system is sub-optimal. The controlled differentiation of neural stem/progenitor cells (NPCs) to functional neurons is a possible treatment strategy. In contrast to the classical approach of biochemicals supplementation for guided stem cell commitment, this study explores the feasibility of directing neuronal differentiation through synergistic integration of three-dimensional nanofibrous topographical cues and scaffold-mediated knockdown of RE-1 silencing transcription factor (REST) in mouse NPCs. Taking advantage of the strong adhesive property and latent reactivity of mussel-inspired polydopamine (PD) coating, electrospun polycaprolactone (PCL) nanofibers were successfully functionalized with REST siRNAs (denoted as siREST PD-fiber). Sustained REST knockdown in NPCs was achieved for up to five days in vitro and the silencing efficiency was significantly higher than that mediated through siRNA adsorption onto non-PD coated sample controls. The silencing of REST, together with nanofiber topographical effect, significantly enhanced NPC neuronal commitment (57.5% Map2(+) cells in siREST PD-fiber vs. 43.5% in siREST PD-film vs. 50% in PD-fiber controls, p < 0.05) while reducing astrocytic and oligodendrocytic differentiation (10.7% O4(+) cells vs. ∼30% in siREST PD-film, p < 0.01). Taken together, the synergistic effects of scaffold-mediated REST knockdown and topographical cues from PD-modified nanofibers may be a useful strategy for generating functional neurons for therapeutic purposes.
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Affiliation(s)
- Wei Ching Low
- Division of Chemical and Biomolecular Engineering, School of Chemical and Biomedical Engineering, Nanyang Technological University, Singapore, Singapore
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Nanofiber-mediated release of retinoic acid and brain-derived neurotrophic factor for enhanced neuronal differentiation of neural progenitor cells. Drug Deliv Transl Res 2013; 5:89-100. [DOI: 10.1007/s13346-013-0131-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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