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  1. Article ; Online: Ex vivo gene therapy for the treatment of neurological disorders.

    Gowing, Genevieve / Svendsen, Soshana / Svendsen, Clive N

    Progress in brain research

    2017  Volume 230, Page(s) 99–132

    Abstract: Ex vivo gene therapy involves the genetic modification of cells outside of the body to produce therapeutic factors and their subsequent transplantation back into patients. Various cell types can be genetically engineered. However, with the explosion in ... ...

    Abstract Ex vivo gene therapy involves the genetic modification of cells outside of the body to produce therapeutic factors and their subsequent transplantation back into patients. Various cell types can be genetically engineered. However, with the explosion in stem cell technologies, neural stem/progenitor cells and mesenchymal stem cells are most often used. The synergy between the effect of the new cell and the additional engineered properties can often provide significant benefits to neurodegenerative changes in the brain. In this review, we cover both preclinical animal studies and clinical human trials that have used ex vivo gene therapy to treat neurological disorders with a focus on Parkinson's disease, Huntington's disease, Alzheimer's disease, ALS, and stroke. We highlight some of the major advances in this field including new autologous sources of pluripotent stem cells, safer ways to introduce therapeutic transgenes, and various methods of gene regulation. We also address some of the remaining hurdles including tunable gene regulation, in vivo cell tracking, and rigorous experimental design. Overall, given the current outcomes from researchers and clinical trials, along with exciting new developments in ex vivo gene and cell therapy, we anticipate that successful treatments for neurological diseases will arise in the near future.
    MeSH term(s) Animals ; Cell- and Tissue-Based Therapy ; Genetic Therapy ; Humans ; Mesenchymal Stem Cell Transplantation ; Nervous System Diseases/genetics ; Nervous System Diseases/therapy ; Neural Stem Cells ; Stem Cell Transplantation
    Language English
    Publishing date 2017
    Publishing country Netherlands
    Document type Journal Article ; Review
    ISSN 1875-7855 ; 0079-6123
    ISSN (online) 1875-7855
    ISSN 0079-6123
    DOI 10.1016/bs.pbr.2016.11.003
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: A cGMP-applicable expansion method for aggregates of human neural stem and progenitor cells derived from pluripotent stem cells or fetal brain tissue.

    Shelley, Brandon C / Gowing, Geneviève / Svendsen, Clive N

    Journal of visualized experiments : JoVE

    2014  , Issue 88

    Abstract: A cell expansion technique to amass large numbers of cells from a single specimen for research experiments and clinical trials would greatly benefit the stem cell community. Many current expansion methods are laborious and costly, and those involving ... ...

    Abstract A cell expansion technique to amass large numbers of cells from a single specimen for research experiments and clinical trials would greatly benefit the stem cell community. Many current expansion methods are laborious and costly, and those involving complete dissociation may cause several stem and progenitor cell types to undergo differentiation or early senescence. To overcome these problems, we have developed an automated mechanical passaging method referred to as "chopping" that is simple and inexpensive. This technique avoids chemical or enzymatic dissociation into single cells and instead allows for the large-scale expansion of suspended, spheroid cultures that maintain constant cell/cell contact. The chopping method has primarily been used for fetal brain-derived neural progenitor cells or neurospheres, and has recently been published for use with neural stem cells derived from embryonic and induced pluripotent stem cells. The procedure involves seeding neurospheres onto a tissue culture Petri dish and subsequently passing a sharp, sterile blade through the cells effectively automating the tedious process of manually mechanically dissociating each sphere. Suspending cells in culture provides a favorable surface area-to-volume ratio; as over 500,000 cells can be grown within a single neurosphere of less than 0.5 mm in diameter. In one T175 flask, over 50 million cells can grow in suspension cultures compared to only 15 million in adherent cultures. Importantly, the chopping procedure has been used under current good manufacturing practice (cGMP), permitting mass quantity production of clinical-grade cell products.
    MeSH term(s) Brain/cytology ; Brain/embryology ; Cell Aggregation/physiology ; Cell Communication/physiology ; Cell Growth Processes/physiology ; Cytological Techniques/methods ; Humans ; Neural Stem Cells/cytology ; Pluripotent Stem Cells/cytology
    Language English
    Publishing date 2014-06-15
    Publishing country United States
    Document type Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't ; Video-Audio Media
    ZDB-ID 2259946-0
    ISSN 1940-087X ; 1940-087X
    ISSN (online) 1940-087X
    ISSN 1940-087X
    DOI 10.3791/51219
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article ; Online: Stem cell transplantation for motor neuron disease: current approaches and future perspectives.

    Gowing, Genevieve / Svendsen, Clive N

    Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics

    2011  Volume 8, Issue 4, Page(s) 591–606

    Abstract: Motor neuron degeneration leading to muscle atrophy and death is a pathological hallmark of disorders, such as amyotrophic lateral sclerosis or spinal muscular atrophy. No effective treatment is available for these devastating diseases. At present, cell- ... ...

    Abstract Motor neuron degeneration leading to muscle atrophy and death is a pathological hallmark of disorders, such as amyotrophic lateral sclerosis or spinal muscular atrophy. No effective treatment is available for these devastating diseases. At present, cell-based therapies targeting motor neuron replacement, support, or as a vehicle for the delivery of neuroprotective molecules are being investigated. Although many challenges and questions remain, the beneficial effects observed following transplantation therapy in animal models of motor neuron disease has sparked hope and a number of clinical trials. Here, we provide a comprehensive review of cell-based therapeutics for motor neuron disorders, with a particular emphasis on amyotrophic lateral sclerosis.
    MeSH term(s) Animals ; Humans ; Mice ; Motor Neuron Disease/surgery ; Neurons/physiology ; Stem Cell Transplantation/methods ; Stem Cell Transplantation/trends
    Language English
    Publishing date 2011-09-06
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 2316693-9
    ISSN 1878-7479 ; 1933-7213
    ISSN (online) 1878-7479
    ISSN 1933-7213
    DOI 10.1007/s13311-011-0068-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: A cgmp-applicable expansion method for aggregates of human neural stem and progenitor cells derived from pluripotent stem cells or fetal brain tissue

    Shelley, Brandon C / Gowing, Geneviève / Svendsen, Clive N

    Journal of visualized experiments. 2014 June 15, , no. 88

    2014  

    Abstract: A cell expansion technique to amass large numbers of cells from a single specimen for research experiments and clinical trials would greatly benefit the stem cell community. Many current expansion methods are laborious and costly, and those involving ... ...

    Abstract A cell expansion technique to amass large numbers of cells from a single specimen for research experiments and clinical trials would greatly benefit the stem cell community. Many current expansion methods are laborious and costly, and those involving complete dissociation may cause several stem and progenitor cell types to undergo differentiation or early senescence. To overcome these problems, we have developed an automated mechanical passaging method referred to as “chopping” that is simple and inexpensive. This technique avoids chemical or enzymatic dissociation into single cells and instead allows for the large-scale expansion of suspended, spheroid cultures that maintain constant cell/cell contact. The chopping method has primarily been used for fetal brain-derived neural progenitor cells or neurospheres, and has recently been published for use with neural stem cells derived from embryonic and induced pluripotent stem cells. The procedure involves seeding neurospheres onto a tissue culture Petri dish and subsequently passing a sharp, sterile blade through the cells effectively automating the tedious process of manually mechanically dissociating each sphere. Suspending cells in culture provides a favorable surface area-to-volume ratio; as over 500,000 cells can be grown within a single neurosphere of less than 0.5 mm in diameter. In one T175 flask, over 50 million cells can grow in suspension cultures compared to only 15 million in adherent cultures. Importantly, the chopping procedure has been used under current good manufacturing practice (cGMP), permitting mass quantity production of clinical-grade cell products.
    Keywords automation ; brain ; chopping ; clinical trials ; dissociation ; good manufacturing practices ; neural stem cells ; tissue culture
    Language English
    Dates of publication 2014-0615
    Size p. e51219.
    Publishing place Journal of Visualized Experiments
    Document type Article
    ZDB-ID 2259946-0
    ISSN 1940-087X
    ISSN 1940-087X
    DOI 10.3791/51219
    Database NAL-Catalogue (AGRICOLA)

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  5. Article ; Online: The past, present and future of stem cell clinical trials for ALS.

    Thomsen, Gretchen M / Gowing, Genevieve / Svendsen, Soshana / Svendsen, Clive N

    Experimental neurology

    2014  Volume 262 Pt B, Page(s) 127–137

    Abstract: Amyotrophic lateral sclerosis (ALS) is a devastating neurodegenerative disorder that is characterized by progressive degeneration of motor neurons in the cortex, brainstem and spinal cord. This leads to paralysis, respiratory insufficiency and death ... ...

    Abstract Amyotrophic lateral sclerosis (ALS) is a devastating neurodegenerative disorder that is characterized by progressive degeneration of motor neurons in the cortex, brainstem and spinal cord. This leads to paralysis, respiratory insufficiency and death within an average of 3 to 5 years from disease onset. While the genetics of ALS are becoming more understood in familial cases, the mechanisms underlying disease pathology remain unclear and there are no effective treatment options. Without understanding what causes ALS it is difficult to design treatments. However, in recent years stem cell transplantation has emerged as a potential new therapy for ALS patients. While motor neuron replacement remains a focus of some studies trying to treat ALS with stem cells, there is more rationale for using stem cells as support cells for dying motor neurons as they are already connected to the muscle. This could be through reducing inflammation, releasing growth factors, and other potential less understood mechanisms. Prior to moving into patients, stringent pre-clinical studies are required that have at least some rationale and efficacy in animal models and good safety profiles. However, given our poor understanding of what causes ALS and whether stem cells may ameliorate symptoms, there should be a push to determine cell safety in pre-clinical models and then a quick translation to the clinic where patient trials will show if there is any efficacy. Here, we provide a critical review of current clinical trials using either mesenchymal or neural stem cells to treat ALS patients. Pre-clinical data leading to these trials, as well as those in development are also evaluated in terms of mechanisms of action, validity of conclusions and rationale for advancing stem cell treatment strategies for this devastating disorder.
    MeSH term(s) Amyotrophic Lateral Sclerosis/therapy ; Animals ; Clinical Trials as Topic/history ; Clinical Trials as Topic/methods ; Clinical Trials as Topic/trends ; History, 20th Century ; History, 21st Century ; Humans ; Stem Cell Transplantation/methods ; Stem Cell Transplantation/trends
    Language English
    Publishing date 2014-12
    Publishing country United States
    Document type Historical Article ; Journal Article ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 207148-4
    ISSN 1090-2430 ; 0014-4886
    ISSN (online) 1090-2430
    ISSN 0014-4886
    DOI 10.1016/j.expneurol.2014.02.021
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article ; Online: Ablation of proliferating cells in the CNS exacerbates motor neuron disease caused by mutant superoxide dismutase.

    Audet, Jean-Nicolas / Gowing, Geneviève / Paradis, Renée / Soucy, Geneviève / Julien, Jean-Pierre

    PloS one

    2012  Volume 7, Issue 4, Page(s) e34932

    Abstract: Proliferation of glia and immune cells is a common pathological feature of many neurodegenerative diseases including amyotrophic lateral sclerosis (ALS). Here, to investigate the role of proliferating cells in motor neuron disease, SOD1(G93A) transgenic ... ...

    Abstract Proliferation of glia and immune cells is a common pathological feature of many neurodegenerative diseases including amyotrophic lateral sclerosis (ALS). Here, to investigate the role of proliferating cells in motor neuron disease, SOD1(G93A) transgenic mice were treated intracerebroventicularly (i.c.v.) with the anti-mitotic drug cytosine arabinoside (Ara-C). I.c.v. delivery of Ara-C accelerated disease progression in SOD1(G93A) mouse model of ALS. Ara-C treatment caused substantial decreases in the number of microglia, NG2+ progenitors, Olig2+ cells and CD3+ T cells in the lumbar spinal cord of symptomatic SOD1(G93A) transgenic mice. Exacerbation of disease was also associated with significant alterations in the expression inflammatory molecules IL-1β, IL-6, TGF-β and the growth factor IGF-1.
    MeSH term(s) Amyotrophic Lateral Sclerosis/pathology ; Animals ; Cell Proliferation/drug effects ; Cytarabine/pharmacology ; Disease Models, Animal ; Disease Progression ; Humans ; Insulin-Like Growth Factor I/metabolism ; Interleukin-6/metabolism ; Mice ; Mice, Transgenic ; Microglia/drug effects ; Motor Neuron Disease/complications ; Superoxide Dismutase/genetics ; Transforming Growth Factor beta/metabolism
    Chemical Substances Interleukin-6 ; Transforming Growth Factor beta ; Cytarabine (04079A1RDZ) ; Insulin-Like Growth Factor I (67763-96-6) ; Superoxide Dismutase (EC 1.15.1.1)
    Language English
    Publishing date 2012-04-16
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ISSN 1932-6203
    ISSN (online) 1932-6203
    DOI 10.1371/journal.pone.0034932
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Ablation of proliferating cells in the CNS exacerbates motor neuron disease caused by mutant superoxide dismutase.

    Jean-Nicolas Audet / Geneviève Gowing / Renée Paradis / Geneviève Soucy / Jean-Pierre Julien

    PLoS ONE, Vol 7, Iss 4, p e

    2012  Volume 34932

    Abstract: Proliferation of glia and immune cells is a common pathological feature of many neurodegenerative diseases including amyotrophic lateral sclerosis (ALS). Here, to investigate the role of proliferating cells in motor neuron disease, SOD1(G93A) transgenic ... ...

    Abstract Proliferation of glia and immune cells is a common pathological feature of many neurodegenerative diseases including amyotrophic lateral sclerosis (ALS). Here, to investigate the role of proliferating cells in motor neuron disease, SOD1(G93A) transgenic mice were treated intracerebroventicularly (i.c.v.) with the anti-mitotic drug cytosine arabinoside (Ara-C). I.c.v. delivery of Ara-C accelerated disease progression in SOD1(G93A) mouse model of ALS. Ara-C treatment caused substantial decreases in the number of microglia, NG2+ progenitors, Olig2+ cells and CD3+ T cells in the lumbar spinal cord of symptomatic SOD1(G93A) transgenic mice. Exacerbation of disease was also associated with significant alterations in the expression inflammatory molecules IL-1β, IL-6, TGF-β and the growth factor IGF-1.
    Keywords Medicine ; R ; Science ; Q
    Language English
    Publishing date 2012-01-01T00:00:00Z
    Publisher Public Library of Science (PLoS)
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  8. Article ; Online: Wild-type human SOD1 overexpression does not accelerate motor neuron disease in mice expressing murine Sod1 G86R.

    Audet, Jean-Nicolas / Gowing, Geneviève / Julien, Jean-Pierre

    Neurobiology of disease

    2010  Volume 40, Issue 1, Page(s) 245–250

    Abstract: Approximately 10% of the cases of amyotrophic lateral sclerosis (ALS) are inherited, with the majority of identified linkages in the gene encoding Cu/Zn superoxide dismutase (SOD1). Recent studies showed that human wild-type SOD1 (SOD1(WT)) ... ...

    Abstract Approximately 10% of the cases of amyotrophic lateral sclerosis (ALS) are inherited, with the majority of identified linkages in the gene encoding Cu/Zn superoxide dismutase (SOD1). Recent studies showed that human wild-type SOD1 (SOD1(WT)) overexpression accelerated disease in mice expressing human SOD1 mutants linked to ALS. However, there is a controversy whether the exacerbation mechanism occurs through coaggregation of human SOD1(WT) with SOD1 mutants, stabilization by SOD1(WT) of toxic soluble SOD1 species, or conversion of SOD1(WT) into toxic species through oxidative damage. To further address whether the exacerbation of disease requires misfolding, modifications, and/or interaction of SOD1(WT) with pathogenic forms of SOD1 species, we have studied the effect of human SOD1(WT) overexpression in mice expressing the murine mutant Sod1(G86R). Surprisingly, unlike a previous report with SOD1(G85R) mice, SOD1(WT) overexpression did not affect the life span of Sod1(G86R) mice. Our analysis of spinal cord extracts revealed a lack of heterodimerization or aggregation between human SOD1(WT) and mouse Sod1(G86R) proteins. Moreover, there was no evidence of conversion of SOD1(WT) into misfolded or abnormal SOD1 isoforms based on immunoreactivity with monoclonal antibodies specific to misfolded forms of SOD1 mutants and on analysis of SOD1 isoforms after two-dimensional gel electrophoresis. We conclude that a direct interaction between wild type and mutant forms of SOD1 is required for exacerbation of ALS disease by SOD1(WT) protein.
    MeSH term(s) Amino Acid Sequence ; Animals ; Base Sequence ; Disease Models, Animal ; Disease Progression ; Humans ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Molecular Sequence Data ; Motor Neuron Disease/enzymology ; Motor Neuron Disease/genetics ; Motor Neuron Disease/pathology ; Mutation ; Spinal Cord/enzymology ; Spinal Cord/pathology ; Superoxide Dismutase/biosynthesis ; Superoxide Dismutase/genetics ; Superoxide Dismutase/physiology ; Superoxide Dismutase-1
    Chemical Substances SOD1 protein, human ; Sod1 protein, mouse (EC 1.15.1.1) ; Superoxide Dismutase (EC 1.15.1.1) ; Superoxide Dismutase-1 (EC 1.15.1.1)
    Language English
    Publishing date 2010-10
    Publishing country United States
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1211786-9
    ISSN 1095-953X ; 0969-9961
    ISSN (online) 1095-953X
    ISSN 0969-9961
    DOI 10.1016/j.nbd.2010.05.031
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Transplantation of human neural progenitor cells secreting GDNF into the spinal cord of patients with ALS: a phase 1/2a trial.

    Baloh, Robert H / Johnson, J Patrick / Avalos, Pablo / Allred, Peggy / Svendsen, Soshana / Gowing, Genevieve / Roxas, Kristina / Wu, Amanda / Donahue, Becky / Osborne, Sheryl / Lawless, George / Shelley, Brandon / Wheeler, Koral / Prina, Carolyn / Fine, Dana / Kendra-Romito, Tami / Stokes, Haniah / Manoukian, Vicki / Muthukumaran, Abirami /
    Garcia, Leslie / Bañuelos, Maria G / Godoy, Marlesa / Bresee, Catherine / Yu, Hong / Drazin, Doniel / Ross, Lindsey / Naruse, Robert / Babu, Harish / Macklin, Eric A / Vo, Ashley / Elsayegh, Ashraf / Tourtellotte, Warren / Maya, Marcel / Burford, Matthew / Diaz, Frank / Patil, Chirag G / Lewis, Richard A / Svendsen, Clive N

    Nature medicine

    2022  Volume 28, Issue 9, Page(s) 1813–1822

    Abstract: Amyotrophic lateral sclerosis (ALS) involves progressive motor neuron loss, leading to paralysis and death typically within 3-5 years of diagnosis. Dysfunctional astrocytes may contribute to disease and glial cell line-derived neurotrophic factor (GDNF) ... ...

    Abstract Amyotrophic lateral sclerosis (ALS) involves progressive motor neuron loss, leading to paralysis and death typically within 3-5 years of diagnosis. Dysfunctional astrocytes may contribute to disease and glial cell line-derived neurotrophic factor (GDNF) can be protective. Here we show that human neural progenitor cells transduced with GDNF (CNS10-NPC-GDNF) differentiated to astrocytes protected spinal motor neurons and were safe in animal models. CNS10-NPC-GDNF were transplanted unilaterally into the lumbar spinal cord of 18 ALS participants in a phase 1/2a study (NCT02943850). The primary endpoint of safety at 1 year was met, with no negative effect of the transplant on motor function in the treated leg compared with the untreated leg. Tissue analysis of 13 participants who died of disease progression showed graft survival and GDNF production. Benign neuromas near delivery sites were common incidental findings at post-mortem. This study shows that one administration of engineered neural progenitors can provide new support cells and GDNF delivery to the ALS patient spinal cord for up to 42 months post-transplantation.
    MeSH term(s) Amyotrophic Lateral Sclerosis/therapy ; Animals ; Disease Models, Animal ; Glial Cell Line-Derived Neurotrophic Factor/genetics ; Humans ; Neural Stem Cells ; Spinal Cord ; Superoxide Dismutase
    Chemical Substances Glial Cell Line-Derived Neurotrophic Factor ; Superoxide Dismutase (EC 1.15.1.1)
    Language English
    Publishing date 2022-09-05
    Publishing country United States
    Document type Clinical Trial, Phase I ; Clinical Trial, Phase II ; Journal Article ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 1220066-9
    ISSN 1546-170X ; 1078-8956
    ISSN (online) 1546-170X
    ISSN 1078-8956
    DOI 10.1038/s41591-022-01956-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article ; Online: Absence of tumor necrosis factor-alpha does not affect motor neuron disease caused by superoxide dismutase 1 mutations.

    Gowing, Geneviève / Dequen, Florence / Soucy, Geneviève / Julien, Jean-Pierre

    The Journal of neuroscience : the official journal of the Society for Neuroscience

    2006  Volume 26, Issue 44, Page(s) 11397–11402

    Abstract: An increase in the expression of the proinflammatory cytokine tumor necrosis factor alpha (TNF-alpha) has been observed in patients with amyotrophic lateral sclerosis (ALS) and in the mice models of the disease. TNF-alpha is a potent activator of ... ...

    Abstract An increase in the expression of the proinflammatory cytokine tumor necrosis factor alpha (TNF-alpha) has been observed in patients with amyotrophic lateral sclerosis (ALS) and in the mice models of the disease. TNF-alpha is a potent activator of macrophages and microglia and, under certain conditions, can induce or exacerbate neuronal cell death. Here, we assessed the contribution of TNF-alpha in motor neuron disease in mice overexpressing mutant superoxide dismutase 1 (SOD1) genes linked to familial ALS. This was accomplished by the generation of mice expressing SOD1(G37R) or SOD1(G93A) mutants in the context of TNF-alpha gene knock out. Surprisingly, the absence of TNF-alpha did not affect the lifespan or the extent of motor neuron loss in SOD1 transgenic mice. These results provide compelling evidence indicating that TNF-alpha does not directly contribute to motor neuron degeneration caused by SOD1 mutations.
    MeSH term(s) Animals ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Mice, Transgenic ; Motor Neuron Disease/enzymology ; Motor Neuron Disease/genetics ; Motor Neuron Disease/pathology ; Mutation ; Superoxide Dismutase/genetics ; Superoxide Dismutase/metabolism ; Superoxide Dismutase-1 ; Tumor Necrosis Factor-alpha/deficiency ; Tumor Necrosis Factor-alpha/genetics ; Tumor Necrosis Factor-alpha/physiology
    Chemical Substances Tumor Necrosis Factor-alpha ; Sod1 protein, mouse (EC 1.15.1.1) ; Superoxide Dismutase (EC 1.15.1.1) ; Superoxide Dismutase-1 (EC 1.15.1.1)
    Language English
    Publishing date 2006-02-17
    Publishing country United States
    Document type Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 604637-x
    ISSN 1529-2401 ; 0270-6474
    ISSN (online) 1529-2401
    ISSN 0270-6474
    DOI 10.1523/JNEUROSCI.0602-06.2006
    Database MEDical Literature Analysis and Retrieval System OnLINE

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