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Hajisoltani R, Taghizadeh M, Hamblin MR, Ramezani F. Could conditioned medium be used instead of stem cell transplantation to repair spinal cord injury in animal models? Identifying knowledge gaps. J Neuropathol Exp Neurol 2023; 82:753-759. [PMID: 37535839 DOI: 10.1093/jnen/nlad053] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/05/2023] Open
Abstract
The drawbacks of stem cell (SC) therapies have led to investigations of SC conditioned medium (CM) instead of SC transplantation in the repair of spinal cord injury (SCI). However, the effectiveness of CM in comparison with cell transplantation in SCI models remain an open and intriguing question. The focus of this review was to survey existing publications addressing this comparison. The review included articles from electronic databases Medline, Embase, Scopus, and Web of Science that included comparisons of the effects of CM versus SC transplantation and versus controls on locomotion after SCI. The search yielded 5 studies and 6 experiments. The results indicated that there was insufficient evidence to conclude that treatment with CM and source cells were equally effective (SMD = 0.12; 95% CI = -0.36 to 0.59; p = 0.07). Regarding investigations of separate effects of SCs versus CM, there currently is limited evidence on efficacy in SCI models. This highlights a notable concern affecting this field. Thus, we identified critical knowledge gaps concerning comparisons of the efficacy of therapeutic application of SC and their derived CM on functional recovery following SCI.
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Affiliation(s)
- Razieh Hajisoltani
- Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Mona Taghizadeh
- Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran
| | - Michael R Hamblin
- Laser Research Centre, Faculty of Health Science, University of Johannesburg, Doornfontein, South Africa
| | - Fatemeh Ramezani
- Physiology Research Center, Iran University of Medical Sciences, Tehran, Iran
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Farid MF, S Abouelela Y, Rizk H. Stem cell treatment trials of spinal cord injuries in animals. Auton Neurosci 2022; 238:102932. [PMID: 35016045 DOI: 10.1016/j.autneu.2021.102932] [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: 09/18/2021] [Revised: 11/01/2021] [Accepted: 12/23/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Spinal cord injury (SCI) is a serious neurological spinal cord damage that resulted in the loss of temporary or permanent function. However, there are even now no effective therapies for it. So, a new medical promising therapeutic hotspot over the previous decades appeared which was (Stem cell (SC) cure of SCI). Otherwise, animal models are considered in preclinical research as a model for humans to trial a potential new treatment. METHODOLOGY Following articles were saved from different databases (PubMed, Google scholar, Egyptian knowledge bank, Elsevier, Medline, Embase, ProQuest, BMC) on the last two decades, and data were obtained then analyzed. RESULTS This review discusses the type and grading of SCI. As well as different types of stem cells therapy for SCI, including mesenchymal stem cells (MSCs), neural stem cells (NSCs), hematopoietic stem cells (HSCs), induced pluripotent stem cells (iPSCs), and embryonic stem cells (ESCs). The review focuses on the transplantation pathways, clinical evaluation, and clinical signs of different types of SC on different animal models which are summarized in tables to give an easy to reach. CONCLUSION Pharmacological and physiotherapy have limited regenerative power in comparison with stem cells medication in the treatment of SCI. Among several sources of cell therapies, mesenchymal stromal/stem cell (MSC) one is being progressively developed as a trusted important energetic way to repair and regenerate. Finally, a wide-ranged animal models have been condensed that helped in human clinical trial therapies.
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Affiliation(s)
- Mariam F Farid
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt
| | - Yara S Abouelela
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt.
| | - Hamdy Rizk
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Cairo University, Giza 12211, Egypt
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Al Mamun A, Monalisa I, Tul Kubra K, Akter A, Akter J, Sarker T, Munir F, Wu Y, Jia C, Afrin Taniya M, Xiao J. Advances in immunotherapy for the treatment of spinal cord injury. Immunobiology 2020; 226:152033. [PMID: 33321368 DOI: 10.1016/j.imbio.2020.152033] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2020] [Revised: 10/19/2020] [Accepted: 11/18/2020] [Indexed: 12/11/2022]
Abstract
Spinal cord injury (SCI) is a leading cause of morbidity and disability in the world. Over the past few decades, the exact molecular mechanisms describing secondary, persistent injuries, as well as primary and transient injuries, have attracted massive attention to the clinicians and researchers. Recent investigations have distinctly shown the critical roles of innate and adaptive immune responses in regulating sterile neuroinflammation and functional outcomes after SCI. In past years, some promising advances in immunotherapeutic options have efficaciously been identified for the treatment of SCI. In our narrative review, we have mainly focused on the new therapeutic strategies such as the maturation and apoptosis of immune cells by several agents, mesenchymal stem cells (MSCs) as well as multi-factor combination therapy, which have recently provided novel ideas and prospects for the future treatment of SCI. This article also illustrates the latest progress in clarifying the potential roles of innate and adaptive immune responses in SCI, the progression and specification of prospective immunotherapy and outstanding issues in the area.
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Affiliation(s)
- Abdullah Al Mamun
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035 Zhejiang Province, China
| | - Ilma Monalisa
- Department of Pharmacy, Southeast University, Banani, Dhaka 1213, Bangladesh
| | - Khadija Tul Kubra
- Department of Pharmacy, University of Development Alternative, Dhaka 1209, Bangladesh
| | - Afroza Akter
- Department of Microbiology, Noakhali Science and Technology University, Noakhali 3814, Bangladesh
| | - Jaheda Akter
- Department of Pharmacy, International Islamic University Chittagong, Kumira, Chattogram-4318, Chittagong, Bangladesh
| | - Tamanna Sarker
- Department of Pharmacy, University of Asia Pacific, Dhaka 1205, Bangladesh
| | - Fahad Munir
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, 325000 Zhejiang Province, China
| | - Yanqing Wu
- Institute of Life Sciences, Wenzhou University, Wenzhou, 325035 Zhejiang Province, China
| | - Chang Jia
- Pediatric Research Institute, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, 325027 Zhejiang Province, China
| | - Masuma Afrin Taniya
- Department of Life Sciences, School of Environment and Life Sciences, Independent University, Bangladesh, Dhaka 1229, Bangladesh
| | - Jian Xiao
- Molecular Pharmacology Research Center, School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou, 325035 Zhejiang Province, China.
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NT3-chitosan enables de novo regeneration and functional recovery in monkeys after spinal cord injury. Proc Natl Acad Sci U S A 2018; 115:E5595-E5604. [PMID: 29844162 DOI: 10.1073/pnas.1804735115] [Citation(s) in RCA: 103] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Spinal cord injury (SCI) often leads to permanent loss of motor, sensory, and autonomic functions. We have previously shown that neurotrophin3 (NT3)-loaded chitosan biodegradable material allowed for prolonged slow release of NT3 for 14 weeks under physiological conditions. Here we report that NT3-loaded chitosan, when inserted into a 1-cm gap of hemisectioned and excised adult rhesus monkey thoracic spinal cord, elicited robust axonal regeneration. Labeling of cortical motor neurons indicated motor axons in the corticospinal tract not only entered the injury site within the biomaterial but also grew across the 1-cm-long lesion area and into the distal spinal cord. Through a combination of magnetic resonance diffusion tensor imaging, functional MRI, electrophysiology, and kinematics-based quantitative walking behavioral analyses, we demonstrated that NT3-chitosan enabled robust neural regeneration accompanied by motor and sensory functional recovery. Given that monkeys and humans share similar genetics and physiology, our method is likely translatable to human SCI repair.
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Therapeutic potential of human olfactory bulb neural stem cells for spinal cord injury in rats. Spinal Cord 2016; 54:785-797. [PMID: 26882489 DOI: 10.1038/sc.2016.14] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2015] [Revised: 11/27/2015] [Accepted: 01/05/2016] [Indexed: 12/12/2022]
Abstract
STUDY DESIGN Adult human olfactory bulb neural stem cells (OBNSCs) were isolated from human patients undergoing craniotomy for tumor resection. They were genetically engineered to overexpresses green fluorescent protein (GFP) to help trace them following engraftment. Spinal cord injury (SCI) was induced in rats using standard laminectomy protocol, and GFP-OBNSC were engrafted into rat model of SCI at day 7 post injury. Three rat groups were used: (i) Control group, (ii) Sham group (injected with cerebrospinal fluid) and treated group (engrafted with OBNSCs). Tissues from different groups were collected weekly up to 2 months. The collected tissues were fixed in 4% paraformaldehyde, processed for paraffin sectioning, immunohistochemically stained for different neuronal and glial markers and examined with bright-field fluorescent microscopy. Restoration of sensory motor functions we assessed on a weekly bases using the BBB score. OBJECTIVES To assess the therapeutic potential of OBNSCs-GFP and their ability to survive, proliferate, differentiate and to restore lost sensory motor functions following their engraftment in spinal cord injury (SCI). METHODS GFP-OBNSC were engrafted into a rat model of SCI at day 7 post injury and were followed-up to 8 weeks using behavioral and histochemical methods. RESULTS All transplanted animals exhibited successful engraftment. The survival rate was about 30% of initially transplanted cells. Twenty-seven percent of the engrafted cells differentiated along the NG2 and O4-positive oligodendrocyte lineage, 16% into MAP2 and β-tubulin-positive neurons, and 56% into GFAP-positive astrocytes. CONCLUSION GFP-OBNSCs had survived for >8 weeks after engraftment and were differentiated into neurons, astrocytes and oligodendrocytes, The engrafted cells were distributed throughout gray and white matter of the cord with no evidence of abnormal morphology or any mass formation indicative of tumorigenesis. However, the engrafted cells failed to restore lost sensory and motor functions as evident from behavioral analysis using the BBB score test.
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Complete rat spinal cord transection as a faithful model of spinal cord injury for translational cell transplantation. Sci Rep 2015; 5:9640. [PMID: 25860664 PMCID: PMC5381701 DOI: 10.1038/srep09640] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2014] [Accepted: 03/09/2015] [Indexed: 01/09/2023] Open
Abstract
Spinal cord injury (SCI) results in neural loss and consequently motor and sensory impairment below the injury. There are currently no effective therapies for the treatment of traumatic SCI in humans. Various animal models have been developed to mimic human SCI. Widely used animal models of SCI are complete or partial transection or experimental contusion and compression, with both bearing controversy as to which one more appropriately reproduces the human SCI functional consequences. Here we present in details the widely used procedure of complete spinal cord transection as a faithful animal model to investigate neural and functional repair of the damaged tissue by exogenous human transplanted cells. This injury model offers the advantage of complete damage to a spinal cord at a defined place and time, is relatively simple to standardize and is highly reproducible.
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Wu Z, Zhao Z, Yu Y, Hu X, Xu W, Zeng Z, Sun YE, Cheng L. New strategies for the repair of spinal cord injury. CHINESE SCIENCE BULLETIN-CHINESE 2014. [DOI: 10.1007/s11434-014-0484-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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8
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Guidance of spiral ganglion neurons over 3 mm using protein patterned surfaces in Co-culture. Tissue Eng Regen Med 2014. [DOI: 10.1007/s13770-014-0035-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Alastrue-Agudo A, Erceg S, Cases-Villar M, Bisbal-Velasco V, Griffeth RJ, Rodriguez-Jiménez FJ, Moreno-Manzano V. Experimental cell transplantation for traumatic spinal cord injury regeneration: intramedullar or intrathecal administration. Methods Mol Biol 2014; 1210:23-35. [PMID: 25173158 DOI: 10.1007/978-1-4939-1435-7_3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Animal experimentation models are a necessary prerequisite to human trials for the use of regenerative medicine in the treatment of spinal cord injuries. Considerable effort is required for the generation of a consistent and reproducible methodology to incur an injury and evaluate the results. The traumatic contusion model has been accepted as a model that closely mimics a typical human traumatic injury, and here we detail step by step an approach to generate a reproducible lesion in rats. Acute cell transplantation by intramedullar or intrathecal administration is described for regenerative interventions. The same model is suitable to design subacute or chronic therapeutic approaches by interventions 1 week or 1 month after lesion.
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Affiliation(s)
- Ana Alastrue-Agudo
- Neuronal and Tissue Regeneration Lab, Centro de Investigación Príncipe Felipe, Eduardo Primo Yúfera 3, Valencia, 46012, Spain
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Clinical Transplantation of Human Embryonic Neural Stem Cells for the Treatment of Cerebral Infarction Sequelae. ACTA ACUST UNITED AC 2013. [DOI: 10.1097/wnq.0b013e31825a6adf] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Current and future therapeutic strategies for functional repair of spinal cord injury. Pharmacol Ther 2011; 132:57-71. [DOI: 10.1016/j.pharmthera.2011.05.006] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2011] [Accepted: 05/09/2011] [Indexed: 12/26/2022]
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Optimal Location and Time for Neural Stem Cell Transplantation into Transected Rat Spinal Cord. Cell Mol Neurobiol 2010; 31:407-14. [DOI: 10.1007/s10571-010-9633-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2010] [Accepted: 11/19/2010] [Indexed: 01/13/2023]
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Lee YB, Polio S, Lee W, Dai G, Menon L, Carroll RS, Yoo SS. Bio-printing of collagen and VEGF-releasing fibrin gel scaffolds for neural stem cell culture. Exp Neurol 2010; 223:645-52. [PMID: 20211178 DOI: 10.1016/j.expneurol.2010.02.014] [Citation(s) in RCA: 228] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2009] [Revised: 02/16/2010] [Accepted: 02/27/2010] [Indexed: 01/12/2023]
Abstract
Time-released delivery of soluble growth factors (GFs) in engineered hydrogel tissue constructs promotes the migration and proliferation of embedded cells, which is an important factor for designing scaffolds that ultimately aim for neural tissue regeneration. We report a tissue engineering technique to print murine neural stem cells (C17.2), collagen hydrogel, and GF (vascular endothelial growth factor: VEGF)-releasing fibrin gel to construct an artificial neural tissue. We examined the morphological changes of the printed C17.2 cells embedded in the collagen and its migration toward the fibrin gel. The cells showed high viability (92.89+/-2.32%) after printing, which was equivalent to that of manually-plated cells. C17.2 cells printed within 1mm from the border of VEGF-releasing fibrin gel showed GF-induced changes in their morphology. The cells printed in this range also migrated toward the fibrin gel, with the total migration distance of 102.4+/-76.1microm over 3days. The cells in the control samples (fibrin without the VEGF or VEGF printed directly in collagen) neither proliferated nor migrated. The results demonstrated that bio-printing of VEGF-containing fibrin gel supported sustained release of the GF in the collagen scaffold. The presented method can be gainfully used in the development of three-dimensional (3D) artificial tissue assays and neural tissue regeneration applications.
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Affiliation(s)
- Yeong-Bae Lee
- Department of Radiology, Brigham and Women's Hospital, Harvard Medical School, 75 Francis Street, Boston, MA 02115, USA
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Temeltas G, Dagci T, Evren V, Lekili M. Effects of Neuronal and Glial Restricted Precursor Cells Transplantation on Erectile Function after Experimentally Induced Spinal Cord Injury. J Sex Med 2009; 6:3265-73. [DOI: 10.1111/j.1743-6109.2009.01376.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Temeltas G, Dagci T, Kurt F, Evren V, Tuglu I. Bladder function recovery in rats with traumatic spinal cord injury after transplantation of neuronal-glial restricted precursors or bone marrow stromal cells. J Urol 2009; 181:2774-9. [PMID: 19375728 DOI: 10.1016/j.juro.2009.01.093] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2008] [Indexed: 10/20/2022]
Abstract
PURPOSE We investigated functional recovery of the lower urinary system in rats with spinal cord injury after transplanting neuronal restricted precursors/glial restricted precursors or neural cells derived from bone marrow stromal cells into the injured area of the spinal cord. MATERIALS AND METHODS A total of 30 rats underwent experimentation in 4 groups, including group 1--sham operation, group 2--spinal cord injury plus neuronal restricted precursor/glial restricted precursor transplantation, group 3--spinal cord injury plus bone marrow stromal cell transplantation and group 4--spinal cord injury control. All rats in the 4 groups were investigated urodynamically and sacrificed on day 28 after transplantation. The cells transplanted into the injured spinal cord underwent histological investigation. RESULTS Transplanted cells (neuronal and glial restricted precursors, and bone marrow stromal cells) were found to maintain a presence in the injured spinal cord area. Baseline pressure, maximum capacity, mean uninhibited contraction amplitude, mean voiding pressure, voided volume and post-void residual volume were significantly better in groups 2 and 3 than in group 4, while baseline pressure in group 2 was better than that in group 3. We found no significant difference among the groups according to mean uninhibited contraction frequency. CONCLUSIONS Although neuronal/glial restricted precursor transplanted rats seemed to have more improvement, all rats in groups 2 and 3 showed some significant improvement in lower urinary system function. On the other hand, the level of this improvement was far from complete functional recovery.
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Affiliation(s)
- Gökhan Temeltas
- Department of Urology, School of Medicine, Celal Bayar University, Faculty of Life Sciences, Manisa, Turkey
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Louro J, Pearse DD. Stem and progenitor cell therapies: recent progress for spinal cord injury repair. Neurol Res 2008; 30:5-16. [PMID: 18387258 DOI: 10.1179/174313208x284070] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Mechanical trauma to the spinal cord is often accompanied by irreversible tissue damage, limited endogenous repair and permanent loss of motor, sensory and autonomic function. The implantation of exogenous cells or the stimulation of endogenous cells, to repopulate and replace or to provide a conducive environment for repair, offers a promising therapeutic direction for overcoming the multitude of obstacles facing successful recovery from spinal cord injury. Although relatively new to the scene of cell based therapies for reparative medicine, stem cells and their progenitors have been labeled as the 'cell of the future' for revolutionizing the treatment of CNS injury and neurodegenerative disorders. The following review examines the different types of stem cells and their progenitors, their utility in experimental models of spinal cord injury and explores the outstanding issues that still need to be addressed before they move towards clinical implementation.
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Affiliation(s)
- J Louro
- The Miami Project to Cure Paralysis, University of Miami School of Medicine, Miami, FL 33136, USA
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Spinal cord injury treatment with intrathecal autologous bone marrow stromal cell transplantation: the first clinical trial case report. ACTA ACUST UNITED AC 2008; 64:53-9. [PMID: 18188099 DOI: 10.1097/ta.0b013e31815b847d] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Wang F, Zhu Y. The interaction of Nogo-66 receptor with Nogo-p4 inhibits the neuronal differentiation of neural stem cells. Neuroscience 2007; 151:74-81. [PMID: 18082332 DOI: 10.1016/j.neuroscience.2007.10.034] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2007] [Revised: 09/19/2007] [Accepted: 10/21/2007] [Indexed: 11/17/2022]
Abstract
The Nogo-66 receptor (NgR) has been found throughout axons in the adult and maturing CNS. An interaction of Nogo on the oligodendrocyte surface with NgR on axons has been suggested to play an important role in limiting axonal growth. In our study, we found that neural stem cells (NSCs) derived from the spinal cords of rats expressed NgR significantly. After normal NSCs differentiation, the average neuronal neurite length was 97.80+/-6.97 microm and the percentage of differentiated neurons was 34.73+/-5.21% 3 days after the differentiation was initiated in vitro. If NSCs were allowed to differentiate in the presence of Nogo-p4 (the active segment of Nogo-66), the average neurite length and the percentage of differentiated neurons were decreased, respectively, to 60.31+/-6.58 microm and 10.26+/-1.22%. An siRNA-mediated knockdown of NgR on NSCs could reverse the inhibitory effect of Nogo-p4 and restore the average neuronal neurite length as well as the percentage of differentiated neurons to 94.01+/-8.37 microm and 31.84+/-4.03%. These results deepen our knowledge about the distribution of NgR and provide a possible strategy of treating NSCs to ameliorate neuronal differentiation after transplantation.
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Affiliation(s)
- F Wang
- Department of Orthopedics, First Affiliated Hospital, China Medical University, Shenyang City, Liaoning Province, 110001, China
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Zietlow R, Lane EL, Dunnett SB, Rosser AE. Human stem cells for CNS repair. Cell Tissue Res 2007; 331:301-22. [PMID: 17901985 DOI: 10.1007/s00441-007-0488-1] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2007] [Accepted: 07/25/2007] [Indexed: 12/31/2022]
Abstract
Although most peripheral tissues have at least a limited ability for self-repair, the central nervous system (CNS) has long been known to be relatively resistant to regeneration. Small numbers of stem cells have been found in the adult brain but do not appear to be able to affect any significant recovery following disease or insult. In the last few decades, the idea of being able to repair the brain by introducing new cells to repair damaged areas has become an accepted potential treatment for neurodegenerative diseases. This review focuses on the suitability of various human stem cell sources for such treatments of both slowly progressing conditions, such as Parkinson's disease, Huntington's disease and multiple sclerosis, and acute insult, such as stroke and spinal cord injury. Despite stem cell transplantation having now moved a step closer to the clinic with the first trials of autologous mesenchymal stem cells, the effects shown are moderate and are not yet at the stage of development that can fulfil the hopes that have been placed on stem cells as a means to replace degenerating cells in the CNS. Success will depend on careful investigation in experimental models to enable us to understand not just the practicalities of stem cell use, but also the underlying biological principles.
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Affiliation(s)
- Rike Zietlow
- Brain Repair Group, School of Biosciences, Cardiff University, Cardiff, CF10 3US, UK.
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Liu X, Wang Y, Li D, Ju X. Transplantation of rat neural stem cells reduces stereotypic behaviors in rats after intrastriatal microinfusion of Tourette syndrome sera. Behav Brain Res 2007; 186:84-90. [PMID: 17850895 DOI: 10.1016/j.bbr.2007.07.040] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2007] [Revised: 07/20/2007] [Accepted: 07/26/2007] [Indexed: 10/23/2022]
Abstract
Tourette syndrome (TS) is a heterogenous neuropsychiatric disorder. In most cases, tics are self-limited or can be treated by behavioral or pharmacological therapy. However, for some individuals, tics can cause lifelong impairment and life-threatening symptoms, which are intractable to traditional treatment. Neural stem cell (NSC) is a potential tool to treat certain neurological diseases. In this study, we proposed to use neural stem cell transplantation as a novel therapy to treat TS and discussed its efficacy. Wistar rats were microinfused with TS sera into the striatum followed by the transplantation of NSCs or vehicle at the infusion site. The sera of the TS patients were identified to have enriched antineural antibodies. Prior to grafting, rat embryonic NSCs were co-cultured with 5-bromodeoxyuridine (Brdu) for 24 h. Stereotypic behaviors were counted at 1, 7, 14 and 21 days after transplantation of NSCs. Morphological analyses revealed that NSCs survived and differentiated into neurons and astrocytes in the striatum 3 weeks after grafting. To sum it up, rat embryonic neural stem cell grafts survived and differentiated in the striatum of TS rat may help relieve stereotypic behaviors of the host. Our results suggest that transplantation of NSCs intrastriatum may have therapeutic potential for TS.
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Affiliation(s)
- Xiumei Liu
- Department of Pediatrics, Qilu Hospital of Shandong University, Jinan, Shandong 250012, China.
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