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Schilke ED, Remoli G, Funelli E, Galimberti M, Fusco ML, Cereda D, Balducci C, Frigo M, Cavaletti G. Current use of fluid biomarkers as outcome measures in Multiple Sclerosis (MS): a review of ongoing pharmacological clinical trials. Neurol Sci 2024; 45:1931-1944. [PMID: 38117403 PMCID: PMC11021285 DOI: 10.1007/s10072-023-07228-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Accepted: 11/25/2023] [Indexed: 12/21/2023]
Abstract
The present study aims to describe the state of the art of fluid biomarkers use in ongoing multiple sclerosis (MS) clinical trials.A review of 608 ongoing protocols in the clinicaltrials.gov and EudraCT databases was performed. The trials enrolled patients with a diagnosis of relapsing remitting MS, secondary progressive MS, and/or primary progressive MS according to Revised McDonald criteria or relapsing MS according to Lublin et al. (2014). The presence of fluid biomarkers among the primary and/or secondary study outcomes was assessed.Overall, 5% of ongoing interventional studies on MS adopted fluid biomarkers. They were mostly used as secondary outcomes in phase 3-4 clinical trials to support the potential disease-modifying properties of the intervention. Most studies evaluated neurofilament light chains (NfLs). A small number considered other novel fluid biomarkers of neuroinflammation and neurodegeneration such as glial fibrillary acid protein (GFAP).Considering the numerous ongoing clinical trials in MS, still a small number adopted fluid biomarkers as outcome measures, thus testifying the distance from clinical practice. In most protocols, fluid biomarkers were used to evaluate the effectiveness of approved second-line therapies, but also, new drugs (particularly Bruton kinase inhibitors). NfLs were also adopted to monitor disease progression after natalizumab suspension in stable patients, cladribine efficacy after anti-CD20 discontinuation, and the efficacy of autologous hematopoietic stem cell transplant (AHSCT) compared to medical treatment. Nevertheless, further validation studies are needed for all considered fluid biomarkers to access clinical practice, and cost-effectiveness in the "real word" remains to be clarified.
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Affiliation(s)
- Edoardo Dalmato Schilke
- Neurology Department, Fondazione IRCCS San Gerardi dei Tintori, Monza, Italy.
- School of Medicine and Surgery and Milan Centre for Neuroscience (NeuroMI), University of Milano-Bicocca, Milan, Italy.
| | - Giulia Remoli
- Neurology Department, Fondazione IRCCS San Gerardi dei Tintori, Monza, Italy
- School of Medicine and Surgery and Milan Centre for Neuroscience (NeuroMI), University of Milano-Bicocca, Milan, Italy
| | - Eugenio Funelli
- Neurology Department, Fondazione IRCCS San Gerardi dei Tintori, Monza, Italy
- School of Medicine and Surgery and Milan Centre for Neuroscience (NeuroMI), University of Milano-Bicocca, Milan, Italy
| | - Michela Galimberti
- Neurology Department, Fondazione IRCCS San Gerardi dei Tintori, Monza, Italy
- School of Medicine and Surgery and Milan Centre for Neuroscience (NeuroMI), University of Milano-Bicocca, Milan, Italy
| | - Maria Letizia Fusco
- Neurology Department, Fondazione IRCCS San Gerardi dei Tintori, Monza, Italy
- School of Medicine and Surgery and Milan Centre for Neuroscience (NeuroMI), University of Milano-Bicocca, Milan, Italy
| | - Diletta Cereda
- Neurology Department, Fondazione IRCCS San Gerardi dei Tintori, Monza, Italy
- School of Medicine and Surgery and Milan Centre for Neuroscience (NeuroMI), University of Milano-Bicocca, Milan, Italy
| | - Claudia Balducci
- Neurology Department, Fondazione IRCCS San Gerardi dei Tintori, Monza, Italy
- School of Medicine and Surgery and Milan Centre for Neuroscience (NeuroMI), University of Milano-Bicocca, Milan, Italy
| | - Maura Frigo
- Neurology Department, Fondazione IRCCS San Gerardi dei Tintori, Monza, Italy
- School of Medicine and Surgery and Milan Centre for Neuroscience (NeuroMI), University of Milano-Bicocca, Milan, Italy
| | - Guido Cavaletti
- Neurology Department, Fondazione IRCCS San Gerardi dei Tintori, Monza, Italy
- School of Medicine and Surgery and Milan Centre for Neuroscience (NeuroMI), University of Milano-Bicocca, Milan, Italy
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Martins DO, Marques DP, Chacur M. Enhancing nerve regeneration in infraorbital nerve injury rat model: effects of vitamin B complex and photobiomodulation. Lasers Med Sci 2024; 39:119. [PMID: 38679671 DOI: 10.1007/s10103-024-04067-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Accepted: 04/22/2024] [Indexed: 05/01/2024]
Abstract
Orofacial nerve injuries may result in temporary or long-term loss of sensory function and decreased quality of life in patients. B vitamins are required for DNA synthesis and the repair and maintenance of phospholipids. In particular, vitamins B1, B6, and B12 are essential for neuronal function. Deficiency in vitamin B complex (VBC) has been linked to increased oxidative stress, inflammation and demyelination. Photobiomodulation (PBM) has antioxidant activity and is neuroprotective. In addition, a growing literature attests to the positive effects of PBM on nerve repair. To assess the effect of PBM and VBC on regenerative process we evaluated the expression of brain-derived neurotrophic factor (BDNF), nerve growth factor (NGF), myelin basic protein (MBP), laminin and neurofilaments (NFs) using Western blotting to identify regenerative pattern after chronic constriction injury of the infraorbital nerve (CCI IoN) treated by PBM, VBC or its combination. After CCI IoN, the rats were divided into six groups naive, sham, injured (CCI IoN), treated with photobiomodulation (904 nm, 6.23 J/cm2, CCI IoN + PBM), treated with VBC (containing B1, B6 and B12) 5 times, CCI IoN + VBC) and treated with PBM and VBC (CCI IoN + VBC + PBM). The treatments could revert low expression of BDNF, MBP and laminin. Also reverted the higher expression of neurofilaments and enhanced expression of NGF. PBM and VBC could accelerate injured infraorbital nerve repair in rats through reducing the expression of neurofilaments, increasing the expression of BDNF, laminin and MBP and overexpressing NGF. These data support the notion that the use of PBM and VBC may help in the treatment of nerve injuries. This finding has potential clinical applications.
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Affiliation(s)
- Daniel Oliveira Martins
- Division of Neuroscience/Hospital Sírio-Libânes, Street Daher Cutait 69, São Paulo, SP, 01308-060, Brazil.
- Departmento de Anatomia, Laboratory of Functional Neuroanatomy of Pain, Universidade de São Paulo Instituto de Ciências Biomédicas, São Paulo, SP, Brazil.
| | - Daniel Pereira Marques
- Departmento de Anatomia, Laboratory of Functional Neuroanatomy of Pain, Universidade de São Paulo Instituto de Ciências Biomédicas, São Paulo, SP, Brazil
| | - Marucia Chacur
- Departmento de Anatomia, Laboratory of Functional Neuroanatomy of Pain, Universidade de São Paulo Instituto de Ciências Biomédicas, São Paulo, SP, Brazil
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Datta D, Gopinadhan A, Soto A, Bangirana P, Opoka RO, Conroy AL, Saykin AJ, Kawata K, John CC. Blood biomarkers of neuronal injury in paediatric cerebral malaria and severe malarial anaemia. Brain Commun 2023; 5:fcad323. [PMID: 38075948 PMCID: PMC10710298 DOI: 10.1093/braincomms/fcad323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2023] [Revised: 10/04/2023] [Accepted: 11/25/2023] [Indexed: 02/12/2024] Open
Abstract
Persistent neurodisability is a known complication in paediatric survivors of cerebral malaria and severe malarial anaemia. Tau, ubiquitin C-terminal hydrolase-L1, neurofilament-light chain, and glial fibrillary acidic protein have proven utility as biomarkers that predict adverse neurologic outcomes in adult and paediatric disorders. In paediatric severe malaria, elevated tau is associated with mortality and neurocognitive complications. We aimed to investigate whether a multi-analyte panel including ubiquitin C-terminal hydrolase-L1, neurofilament-light chain, and glial fibrillary acidic protein can serve as biomarkers of brain injury associated with mortality and neurodisability in cerebral malaria and severe malarial anaemia. In a prospective cohort study of Ugandan children, 18 months to 12 years of age with cerebral malaria (n = 182), severe malarial anaemia (n = 158), and asymptomatic community children (n = 118), we measured admission blood levels of ubiquitin C-terminal hydrolase-L1, neurofilament-light chain, and glial fibrillary acidic protein. We investigated differences in biomarker levels, associations with mortality, blood-brain barrier integrity, neurodeficits and cognitive Z-scores in survivors up to 24-month follow-up. Admission ubiquitin C-terminal hydrolase-L1 levels were elevated >95th percentile of community children in 71 and 51%, and neurofilament-light chain levels were elevated >95th percentile of community children in 40 and 37% of children with cerebral malaria and severe malarial anaemia, respectively. Glial fibrillary acidic protein was not elevated in disease groups compared with controls. In cerebral malaria, elevated neurofilament-light chain was observed in 16 children who died in hospital compared with 166 survivors (P = 0.01); elevations in ubiquitin C-terminal hydrolase-L1 levels were associated with degree of blood-brain barrier disruption (P = 0.01); and the % predictive value for neurodeficits over follow-up (discharge, 6-, 12-, and 24 months) increased for ubiquitin C-terminal hydrolase-L1 (60, 67, 72, and 83), but not neurofilament-light chain (65, 68, 60, and 67). In cerebral malaria, elevated ubiquitin C-terminal hydrolase-L1 was associated with worse memory scores in children <5 years at malaria episode who crossed to over 5 years old during follow-up cognitive testing [β -1.13 (95% confidence interval -2.05, -0.21), P = 0.02], and elevated neurofilament-light chain was associated with worse attention in children ≥5 years at malaria episode and cognitive testing [β -1.08 (95% confidence interval -2.05, -1.05), P = 0.03]. In severe malarial anaemia, elevated ubiquitin C-terminal hydrolase-L1 was associated with worse attention in children <5 years at malaria episode and cognitive testing [β -0.42 (95% confidence interval -0.76, -0.07), P = 0.02]. Ubiquitin C-terminal hydrolase-L1 and neurofilament-light chain levels are elevated in paediatric cerebral malaria and severe malarial anaemia. In cerebral malaria, elevated neurofilament-light chain is associated with mortality whereas elevated ubiquitin C-terminal hydrolase-L1 is associated with blood-brain barrier dysfunction and neurodeficits over follow-up. In cerebral malaria, both markers are associated with worse cognition, while in severe malarial anaemia, only ubiquitin C-terminal hydrolase-L1 is associated with worse cognition.
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Affiliation(s)
- Dibyadyuti Datta
- Ryan White Center for Pediatric Infectious Disease and Global Health, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Adnan Gopinadhan
- Ryan White Center for Pediatric Infectious Disease and Global Health, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Department of Microbiology and Immunology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Alejandro Soto
- Ryan White Center for Pediatric Infectious Disease and Global Health, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Paul Bangirana
- Department of Psychiatry, Makerere University College of Health Sciences, P.O. Box 7072, Kampala, Uganda
- Global Health Uganda, P.O. Box 33842, Kampala, Uganda
| | - Robert O Opoka
- Global Health Uganda, P.O. Box 33842, Kampala, Uganda
- Aga Khan University Medical College, P.O. Box 30270, Nairobi, Kenya
| | - Andrea L Conroy
- Ryan White Center for Pediatric Infectious Disease and Global Health, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Andrew J Saykin
- Indiana Alzheimer’s Disease Research Center and Department of Radiology and Imaging Sciences, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Keisuke Kawata
- Department of Kinesiology, Indiana University School of Public Health-Bloomington, Bloomington, IN 47405, USA
- Program in Neuroscience, The College of Arts and Sciences, Indiana University, Bloomington, IN 47405, USA
| | - Chandy C John
- Ryan White Center for Pediatric Infectious Disease and Global Health, Indiana University School of Medicine, Indianapolis, IN 46202, USA
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do Amaral L, Dos Santos NAG, Sisti FM, Del Bel E, Dos Santos AC. Doxycycline inhibits dopaminergic neurodegeneration through upregulation of axonal and synaptic proteins. NAUNYN-SCHMIEDEBERG'S ARCHIVES OF PHARMACOLOGY 2023; 396:1787-1796. [PMID: 36843128 DOI: 10.1007/s00210-023-02435-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 02/18/2023] [Indexed: 02/28/2023]
Abstract
Doxycycline (DOX) is a widely used antibiotic that is able to cross the blood-brain barrier. Several studies have shown its neuroprotective effect against neurodegeneration and have associated it with antioxidant, anti-apoptotic, and anti-inflammatory mechanisms. We have recently demonstrated that DOX mimics nerve growth factor (NGF) signaling in PC12 cells. However, the involvement of this mechanism in the neuroprotective effect of DOX is unknown. Axonal degeneration and synaptic loss are key events at the early stages of neurodegeneration, and precede the neuronal death in neurodegenerative diseases, including Parkinson's disease (PD). Therefore, the regeneration of the axonal and synaptic network might be beneficial in PD. The effect of DOX in PC12 cells treated with the Parkinsonian neurotoxin 1-methyl-4-phenylpyridinium (MPP+) was addressed. Doxycycline reduced the inhibition of neuritogenesis induced by MPP+, even in cells deprived of NGF. The mechanism involved the upregulation of GAP-43, synapsin I, β-III-tubulin, F-actin, and neurofilament-200, proteins that are associated with axonal and synaptic plasticity. Considering the role of axonal degeneration and synaptic loss at the initial stages of PD, the recent advances in early diagnosis of neurodegeneration, and the advantages of drug repurposing, doxycycline is a promising candidate to treat PD.
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Affiliation(s)
- Lilian do Amaral
- Department of Clinical, Toxicological and Bromatological Analysis, School of Pharmaceutical Sciences of Ribeirão Preto, Av Do Café S/N, University of São Paulo, Ribeirão Preto, SP, 14040-903, Brazil
| | - Neife Aparecida Guinaim Dos Santos
- Department of Clinical, Toxicological and Bromatological Analysis, School of Pharmaceutical Sciences of Ribeirão Preto, Av Do Café S/N, University of São Paulo, Ribeirão Preto, SP, 14040-903, Brazil
| | - Flávia Malvestio Sisti
- Department of Clinical, Toxicological and Bromatological Analysis, School of Pharmaceutical Sciences of Ribeirão Preto, Av Do Café S/N, University of São Paulo, Ribeirão Preto, SP, 14040-903, Brazil
| | - Elaine Del Bel
- Department of Basic and Oral Biology, Faculty of Dentistry of Ribeirão Preto, USP, Av Do Café S/N, 14040-904, Ribeirão Preto, SP, Brazil
| | - Antônio Cardozo Dos Santos
- Department of Clinical, Toxicological and Bromatological Analysis, School of Pharmaceutical Sciences of Ribeirão Preto, Av Do Café S/N, University of São Paulo, Ribeirão Preto, SP, 14040-903, Brazil.
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Al-Arbeed TA, Renno WM, Al-Hassan JM. Neuroregeneration of injured peripheral nerve by fraction B of catfish epidermal secretions through the reversal of the apoptotic pathway and DNA damage. Front Pharmacol 2023; 14:1085314. [PMID: 36726586 PMCID: PMC9885176 DOI: 10.3389/fphar.2023.1085314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 01/03/2023] [Indexed: 01/17/2023] Open
Abstract
Introduction: Crush injuries occur from acute traumatic nerve compression resulting in different degrees of neural damage leading to permanent functional deficits. Recently, we have shown that administration of Fraction B (FB) derived from catfish epidermal secretions accelerates healing of damaged nerve in a sciatic nerve crush injury, as it ameliorates the neurobehavioral deficits and enhances axonal regeneration, as well as protects spinal neurons and increases astrocytic activity and decreasing GAP-43 expression. The present study aimed to investigate the role of FB treatment on the apoptotic pathway in the neuroregeneration of the sciatic nerve crush injury. Methods: Male Wistar rats were randomly assigned into five groups: (I) SHAM, (II) CRUSH, (III) CRUSH + (1.5 mg/kg) FB, (IV) CRUSH + (3 mg/kg) FB, and (V) CRUSH + (4.5 mg/kg) FB. Rats underwent sciatic nerve crush surgery, followed by treatment with FB administered intraperitoneally (IP) daily for two weeks and then sacrificed at the end of the fourth week. Results: FB improved the recovery of neurobehavioral functions with a concomitant increase in axonal regeneration and neuroprotective effects on spinal cord neurons following crush injury. Further, FB enhanced Schwann cells (SCs) proliferation with a significant increase in myelin basic protein expression. FB-treated animals demonstrated higher numbers of neurons in the spinal cord, possibly through ameliorating oxidative DNA damage and alleviating the mitochondrial-dependent apoptotic pathway by inhibiting the release of cytochrome c and the activation of caspase-3 in the spinal cord neurons. Conclusion: FB alleviates the neurodegenerative changes in the lumbar spinal cord neurons and recovers the decrease in the neuronal count through its anti-apoptotic and DNA antioxidative properties.
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Affiliation(s)
- Taiba A. Al-Arbeed
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait
| | - Waleed M. Renno
- Department of Anatomy, Faculty of Medicine, Kuwait University, Kuwait City, Kuwait,*Correspondence: Waleed M. Renno,
| | - Jassim M. Al-Hassan
- Department of Biological Sciences, Faculty of Science, Kuwait University, Kuwait City, Kuwait
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Yang J, Hamade M, Wu Q, Wang Q, Axtell R, Giri S, Mao-Draayer Y. Current and Future Biomarkers in Multiple Sclerosis. Int J Mol Sci 2022; 23:ijms23115877. [PMID: 35682558 PMCID: PMC9180348 DOI: 10.3390/ijms23115877] [Citation(s) in RCA: 37] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 05/06/2022] [Accepted: 05/08/2022] [Indexed: 12/14/2022] Open
Abstract
Multiple sclerosis (MS) is a debilitating autoimmune disorder. Currently, there is a lack of effective treatment for the progressive form of MS, partly due to insensitive readout for neurodegeneration. The recent development of sensitive assays for neurofilament light chain (NfL) has made it a potential new biomarker in predicting MS disease activity and progression, providing an additional readout in clinical trials. However, NfL is elevated in other neurodegenerative disorders besides MS, and, furthermore, it is also confounded by age, body mass index (BMI), and blood volume. Additionally, there is considerable overlap in the range of serum NfL (sNfL) levels compared to healthy controls. These confounders demonstrate the limitations of using solely NfL as a marker to monitor disease activity in MS patients. Other blood and cerebrospinal fluid (CSF) biomarkers of axonal damage, neuronal damage, glial dysfunction, demyelination, and inflammation have been studied as actionable biomarkers for MS and have provided insight into the pathology underlying the disease process of MS. However, these other biomarkers may be plagued with similar issues as NfL. Using biomarkers of a bioinformatic approach that includes cellular studies, micro-RNAs (miRNAs), extracellular vesicles (EVs), metabolomics, metabolites and the microbiome may prove to be useful in developing a more comprehensive panel that addresses the limitations of using a single biomarker. Therefore, more research with recent technological and statistical approaches is needed to identify novel and useful diagnostic and prognostic biomarker tools in MS.
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Affiliation(s)
- Jennifer Yang
- Department of Neurology, Clinical Autoimmunity Center of Excellence, University of Michigan Medical School, Ann Arbor, MI 48109, USA; (J.Y.); (M.H.); (Q.W.); (Q.W.)
| | - Maysa Hamade
- Department of Neurology, Clinical Autoimmunity Center of Excellence, University of Michigan Medical School, Ann Arbor, MI 48109, USA; (J.Y.); (M.H.); (Q.W.); (Q.W.)
| | - Qi Wu
- Department of Neurology, Clinical Autoimmunity Center of Excellence, University of Michigan Medical School, Ann Arbor, MI 48109, USA; (J.Y.); (M.H.); (Q.W.); (Q.W.)
| | - Qin Wang
- Department of Neurology, Clinical Autoimmunity Center of Excellence, University of Michigan Medical School, Ann Arbor, MI 48109, USA; (J.Y.); (M.H.); (Q.W.); (Q.W.)
| | - Robert Axtell
- Department of Arthritis and Clinical Immunology Research, Oklahoma Medical Research Foundation, Oklahoma City, OK 73104, USA;
| | - Shailendra Giri
- Department of Neurology, Henry Ford Health System, Detroit, MI 48202, USA;
| | - Yang Mao-Draayer
- Department of Neurology, Clinical Autoimmunity Center of Excellence, University of Michigan Medical School, Ann Arbor, MI 48109, USA; (J.Y.); (M.H.); (Q.W.); (Q.W.)
- Graduate Program in Immunology, Program in Biomedical Sciences, University of Michigan Medical School, Ann Arbor, MI 48109, USA
- Correspondence: ; Tel.: +1-734-615-5635
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Will Cannabigerol Trigger Neuroregeneration after a Spinal Cord Injury? An In Vitro Answer from NSC-34 Scratch-Injured Cells Transcriptome. Pharmaceuticals (Basel) 2022; 15:ph15020117. [PMID: 35215230 PMCID: PMC8875351 DOI: 10.3390/ph15020117] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Revised: 01/12/2022] [Accepted: 01/17/2022] [Indexed: 02/07/2023] Open
Abstract
Spinal cord injury affects the lives of millions of people around the world, often causing disability and, in unfortunate circumstances, death. Rehabilitation can partly improve outcomes and only a small percentage of patients, typically the least injured, can hope to return to normal living conditions. Cannabis sativa is gaining more and more interest in recent years, even though its beneficial properties have been known for thousands of years. Cannabigerol (CBG), extracted from C. sativa, is defined as the “mother of all cannabinoids” and its properties range from anti-inflammatory to antioxidant and neuroprotection. Using NSC-34 cells to model spinal cord injury in vitro, our work evaluated the properties of CBG treatments in motor neuron regeneration. While pre-treatment can modulate oxidative stress and increase antioxidant enzyme genes, such as Tnx1, decreasing Nos1 post-treatment seems to induce regeneration genes by triggering different pathways, such as Gap43 via p53 acetylation by Ep300 and Ddit3 and Xbp1 via Bdnf signaling, along with cytoskeletal remodeling signaling genes Nrp1 and Map1b. Our results indicate CBG as a phytocompound worth further investigation in the field of neuronal regeneration.
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Translocator Protein Ligand PIGA1138 Reduces Disease Symptoms and Severity in Experimental Autoimmune Encephalomyelitis Model of Primary Progressive Multiple Sclerosis. Mol Neurobiol 2022; 59:1744-1765. [PMID: 35018577 DOI: 10.1007/s12035-022-02737-2] [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: 10/30/2021] [Accepted: 01/04/2022] [Indexed: 10/19/2022]
Abstract
Multiple sclerosis (MS) is an autoimmune and demyelinating disease of the central nervous system (CNS) caused by CNS infiltration of peripheral immune cells, immune-mediated attack of the myelin sheath, neuroinflammation, and/or axonal/neuronal dysfunctions. Some drugs are available to cope with relapsing-remitting MS (RRMS) but there is no therapy for the primary progressive MS (PPMS). Because growing evidence supports a regulatory role of the translocator protein (TSPO) in neuroinflammatory, demyelinating, and neurodegenerative processes, we investigated the therapeutic potential of phenylindolyilglyoxylamydes (PIGAs) TSPO ligands in myelin oligodendrocyte glycoprotein (MOG)-induced experimental autoimmune encephalomyelitis (EAE) mice mimicking the human PPMS. MOG-EAE C57Bl/6-mice were treated by TSPO ligands PIGA839, PIGA1138, or the vehicle. Several methods were combined to evaluate PIGAs-TSPO ligand effects on MOG-EAE symptoms, CNS infiltration by immune cells, demyelination, and axonal damages. PIGA1138 (15 mg/kg) drastically reduced MOG-EAE mice clinical scores, ameliorated motor dysfunctions assessed with the Catwalk device, and counteracted MOG-EAE-induced demyelination by preserving Myelin basic protein (MBP) expression in the CNS. Furthermore, PIGA1138-treatment prevented EAE-evoked decreased neurofilament-200 expression in spinal and cerebellar axons. Moreover, PIGA1138 inhibited peripheral immune-CD45 + cell infiltration in the CNS, suggesting that it may control inflammatory mechanisms involved in PPMS. Concordantly, PIGA1138 enhanced anti-inflammatory interleukin-10 serum level in MOG-EAE mice. PIGA1138-treatment, which increased neurosteroid allopregnanolone production, ameliorated all pathological biomarkers, while PIGA839, unable to activate neurosteroidogenesis in vivo, exerted only moderate/partial effects in MOG-EAE mice. Altogether, our results suggest that PIGA1138-based treatment may represent an interesting possibility to be explored for the innovation of effective therapies against PPMS.
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Braune M, Scherf N, Heine C, Sygnecka K, Pillaiyar T, Parravicini C, Heimrich B, Abbracchio MP, Müller CE, Franke H. Involvement of GPR17 in Neuronal Fibre Outgrowth. Int J Mol Sci 2021; 22:ijms222111683. [PMID: 34769111 PMCID: PMC8584086 DOI: 10.3390/ijms222111683] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 10/24/2021] [Accepted: 10/24/2021] [Indexed: 11/16/2022] Open
Abstract
Characterization of new pharmacological targets is a promising approach in research of neurorepair mechanisms. The G protein-coupled receptor 17 (GPR17) has recently been proposed as an interesting pharmacological target, e.g., in neuroregenerative processes. Using the well-established ex vivo model of organotypic slice co-cultures of the mesocortical dopaminergic system (prefrontal cortex (PFC) and substantia nigra/ventral tegmental area (SN/VTA) complex), the influence of GPR17 ligands on neurite outgrowth from SN/VTA to the PFC was investigated. The growth-promoting effects of Montelukast (MTK; GPR17- and cysteinyl-leukotriene receptor antagonist), the glial cell line-derived neurotrophic factor (GDNF) and of two potent, selective GPR17 agonists (PSB-16484 and PSB-16282) were characterized. Treatment with MTK resulted in a significant increase in mean neurite density, comparable with the effects of GDNF. The combination of MTK and GPR17 agonist PSB-16484 significantly inhibited neuronal growth. qPCR studies revealed an MTK-induced elevated mRNA-expression of genes relevant for neuronal growth. Immunofluorescence labelling showed a marked expression of GPR17 on NG2-positive glia. Western blot and RT-qPCR analysis of untreated cultures suggest a time-dependent, injury-induced stimulation of GPR17. In conclusion, MTK was identified as a stimulator of neurite fibre outgrowth, mediating its effects through GPR17, highlighting GPR17 as an interesting therapeutic target in neuronal regeneration.
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Affiliation(s)
- Max Braune
- Rudolf Boehm Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Härtelstr. 16-18, 04107 Leipzig, Germany; (M.B.); (C.H.); (K.S.)
| | - Nico Scherf
- Methods and Development Group Neural Data Analysis and Statistical Computing, Max Planck Institute for Human Cognitive and Brain Sciences, Stephanstraße 1A, 04103 Leipzig, Germany;
| | - Claudia Heine
- Rudolf Boehm Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Härtelstr. 16-18, 04107 Leipzig, Germany; (M.B.); (C.H.); (K.S.)
| | - Katja Sygnecka
- Rudolf Boehm Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Härtelstr. 16-18, 04107 Leipzig, Germany; (M.B.); (C.H.); (K.S.)
| | - Thanigaimalai Pillaiyar
- Department of Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (T.P.); (C.E.M.)
| | - Chiara Parravicini
- Department of Pharmaceutical Sciences, University of Milan, Via Balzaretti 9, 20133 Milan, Italy; (C.P.); (M.P.A.)
| | - Bernd Heimrich
- Department of Neuroanatomy, Institute of Anatomy and Cell Biology, Center for Basics in NeuroModulation, Faculty of Medicine, University of Freiburg, Albertstr. 23, 79104 Freiburg, Germany;
| | - Maria P. Abbracchio
- Department of Pharmaceutical Sciences, University of Milan, Via Balzaretti 9, 20133 Milan, Italy; (C.P.); (M.P.A.)
| | - Christa E. Müller
- Department of Pharmaceutical & Medicinal Chemistry, Pharmaceutical Institute, University of Bonn, An der Immenburg 4, 53121 Bonn, Germany; (T.P.); (C.E.M.)
| | - Heike Franke
- Rudolf Boehm Institute of Pharmacology and Toxicology, Medical Faculty, University of Leipzig, Härtelstr. 16-18, 04107 Leipzig, Germany; (M.B.); (C.H.); (K.S.)
- Correspondence: ; Tel.: +49-(0)341-9724602; Fax: +49-(0)341-9724609
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10
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Jiao Y, Wang G, Li D, Li H, Liu J, Yang X, Yang W. Okadaic Acid Exposure Induced Neural Tube Defects in Chicken ( Gallus gallus) Embryos. Mar Drugs 2021; 19:md19060322. [PMID: 34199615 PMCID: PMC8227060 DOI: 10.3390/md19060322] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 05/25/2021] [Accepted: 05/27/2021] [Indexed: 01/03/2023] Open
Abstract
Okadaic acid (OA) is an important liposoluble shellfish toxin distributed worldwide, and is mainly responsible for diarrheic shellfish poisoning in human beings. It has a variety of toxicities, including cytotoxicity, embryonic toxicity, neurotoxicity, and even genotoxicity. However, there is no direct evidence of its developmental toxicity in human offspring. In this study, using the chicken (Gallus gallus) embryo as the animal model, we investigated the effects of OA exposure on neurogenesis and the incidence of neural tube defects (NTDs). We found that OA exposure could cause NTDs and inhibit the neuronal differentiation. Immunofluorescent staining of pHI3 and c-Caspase3 demonstrated that OA exposure could promote cell proliferation and inhibit cell apoptosis on the developing neural tube. Besides, the down-regulation of Nrf2 and increase in reactive oxygen species (ROS) content and superoxide dismutase (SOD) activity in the OA-exposed chicken embryos indicated that OA could result in oxidative stress in early chick embryos, which might enhance the risk of the subsequent NTDs. The inhibition of bone morphogenetic protein 4 (BMP4) and Sonic hedgehog (Shh) expression in the dorsal neural tube suggested that OA could also affect the formation of dorsolateral hinge points, which might ultimately hinder the closure of the neural tube. Transcriptome and qPCR analysis showed the expression of lipopolysaccharide-binding protein (LBP), transcription factor AP-1 (JUN), proto-oncogene protein c-fos (FOS), and C-C motif chemokine 4 (CCL4) in the Toll-like receptor signaling pathway was significantly increased in the OA-exposed embryos, suggesting that the NTDs induced by OA might be associated with the Toll-like receptor signaling pathway. Taken together, our findings could advance the understanding of the embryo–fetal developmental toxicity of OA on human gestation.
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Affiliation(s)
- Yuhu Jiao
- Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institute, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; (Y.J.); (D.L.); (H.L.); (J.L.)
| | - Guang Wang
- Key Laboratory for Regenerative Medicine of the Ministry of Education, Division of Histology and Embryology, Medical College, Jinan University, Guangzhou 510632, China;
| | - Dawei Li
- Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institute, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; (Y.J.); (D.L.); (H.L.); (J.L.)
| | - Hongye Li
- Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institute, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; (Y.J.); (D.L.); (H.L.); (J.L.)
| | - Jiesheng Liu
- Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institute, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; (Y.J.); (D.L.); (H.L.); (J.L.)
| | - Xuesong Yang
- Key Laboratory for Regenerative Medicine of the Ministry of Education, Division of Histology and Embryology, Medical College, Jinan University, Guangzhou 510632, China;
- Correspondence: (X.Y.); (W.Y); Tel.: +86-20-85228316 (X.Y.); +86-20-85221491 (W.Y)
| | - Weidong Yang
- Key Laboratory of Aquatic Eutrophication and Control of Harmful Algal Blooms of Guangdong Higher Education Institute, College of Life Science and Technology, Jinan University, Guangzhou 510632, China; (Y.J.); (D.L.); (H.L.); (J.L.)
- Correspondence: (X.Y.); (W.Y); Tel.: +86-20-85228316 (X.Y.); +86-20-85221491 (W.Y)
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11
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Clarke GJB, Skandsen T, Zetterberg H, Einarsen CE, Feyling C, Follestad T, Vik A, Blennow K, Håberg AK. One-Year Prospective Study of Plasma Biomarkers From CNS in Patients With Mild Traumatic Brain Injury. Front Neurol 2021; 12:643743. [PMID: 33967940 PMCID: PMC8097004 DOI: 10.3389/fneur.2021.643743] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Accepted: 03/24/2021] [Indexed: 12/25/2022] Open
Abstract
Objective: To investigate the longitudinal evolution of three blood biomarkers: neurofilament light (NFL), glial fibrillary acidic protein (GFAP) and tau, in out-patients and hospitalized patients with mild traumatic brain injury (mTBI) compared to controls, along with their associations—in patients—with clinical injury characteristics and demographic variables, and ability to discriminate patients with mTBI from controls. Methods: A longitudinal observation study including 207 patients with mTBI, 84 age and sex-matched community controls (CCs) and 52 trauma controls (TCs). Blood samples were collected at 5 timepoints: acute (<24 h), 72 h (24–72 h post-injury), 2 weeks, 3 and 12 months. Injury-related, clinical and demographic variables were obtained at inclusion and brain MRI within 72 h. Results: Plasma GFAP and tau were most elevated acutely and NFL at 2 weeks and 3 months. The group of patients with mTBI and concurrent other somatic injuries (mTBI+) had the highest elevation in all biomarkers across time points, and were more likely to be victims of traffic accidents and violence. All biomarkers were positively associated with traumatic intracranial findings on MRI obtained within 72 h. Glial fibrillary acidic protein and NFL levels were associated with Glasgow Coma Scale (GCS) score and presence of other somatic injuries. Acute GFAP concentrations showed the highest discriminability between patients and controls with an Area Under the Curve (AUC) of 0.92. Acute tau and 2-week NFL concentrations showed moderate discriminability (AUC = 0.70 and AUC = 0.75, respectively). Tau showed high discriminability between mTBI+ and TCs (AUC = 0.80). Conclusions: The association of plasma NFL with traumatic intracranial MRI findings, together with its later peak, could reflect ongoing secondary injury or repair mechanisms, allowing for a protracted diagnostic time window. Patients experiencing both mTBI and other injuries appear to be a subgroup with greater neural injury, differing from both the mTBI without other injuries and from both control groups. Acute GFAP concentrations showed the highest discriminability between patients and controls, were highly associated with intracranial traumatic injury, and showed the largest elevations compared to controls at the acute timepoint, suggesting it to be the most clinically useful plasma biomarker of primary CNS injury in mTBI.
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Affiliation(s)
- Gerard Janez Brett Clarke
- Department of Radiology and Nuclear Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway.,Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Toril Skandsen
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NTNU, Trondheim, Norway.,Department of Physical Medicine and Rehabilitation, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Henrik Zetterberg
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden.,Department of Neurodegenerative Disease, University College London Queen Square Institute of Neurology, London, United Kingdom.,UK Dementia Research Institute at University College London, London, United Kingdom
| | - Cathrine Elisabeth Einarsen
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NTNU, Trondheim, Norway.,Department of Physical Medicine and Rehabilitation, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Casper Feyling
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
| | - Turid Follestad
- Department of Public Health and Nursing, Norwegian University of Science and Technology (NTNU), Trondheim, Norway
| | - Anne Vik
- Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NTNU, Trondheim, Norway.,Department of Neurosurgery, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway
| | - Kaj Blennow
- Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden.,Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Asta Kristine Håberg
- Department of Radiology and Nuclear Medicine, St. Olavs Hospital, Trondheim University Hospital, Trondheim, Norway.,Department of Neuromedicine and Movement Science, Faculty of Medicine and Health Sciences, Norwegian University of Science and Technology, NTNU, Trondheim, Norway
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12
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Khan MI, Hasan F, Mahmud KAHA, Adnan A. Viscoelastic Response of Neurofilaments: An Atomistic Simulation Approach. Biomolecules 2021; 11:biom11040540. [PMID: 33917073 PMCID: PMC8067762 DOI: 10.3390/biom11040540] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Revised: 03/29/2021] [Accepted: 04/05/2021] [Indexed: 12/05/2022] Open
Abstract
Existent literature has limitations regarding the mechanical behavior of axonal cytoskeletal components in a high strain rate scenario, which is mainly due to limitations regarding the structure of some components such as tau protein and neurofilaments (NF). This study performs molecular dynamics (MD) simulations on NFs to extract their strain rate-dependent behavior. It is found that they are highly stretchable and show multiple stages of unfolding. Furthermore, NFs show high tensile stiffness. Also, viscoelastic modeling shows that they correspond to simplified viscoelastic models. This study effectively enhances the existent axonal models focusing on axonal injury.
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13
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Gynura divaricata Water Extract Presented the Possibility to Enhance Neuronal Regeneration. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2021; 2021:8818618. [PMID: 33680064 PMCID: PMC7904343 DOI: 10.1155/2021/8818618] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 02/01/2021] [Accepted: 02/08/2021] [Indexed: 11/20/2022]
Abstract
Gynura divaricata (GD) is an Asian herb widely used as an alternative medicine and functional food for type 2 diabetes. Diabetic neuropathy is considered as an important complication of diabetic patients. This study focused on neuroregenerative effects of GD for use in the prevention of diabetic neuropathy. GD leaves were cut and boiled in water to mimic real-life cooking. The boiled content was filtered through white gauze and lyophilized to preserve as dried powder. Antioxidant assay was performed using DPPH assays. UHPLC-QTOF-MS/MS was employed to test for important compounds in the extract of these herbs. MTT assay was used to test for cell viability. The extracts at concentration of 250 μg/mL were tested with human gingival cell to observe the change of gene expression. The DPPH assay showed that GD water extract at the concentration of 5000 μg/mL could inhibit DPPH radical for 39.2%. The results showed that 5000 µg of GD water extract contained total phenolic content equivalent to 310.9 µg standard gallic acid. UHPLC-QTOF-MS/MS result found phenolic acids and flavonoids as the main components. Human gingival cells treated with 250 μg/mL of GD water extract for 10 days showed upregulation of some neuronal differentiation markers. Staining with Cdr3 dye confirmed the presentation of neuronal progenitors. The extract at the concentration of 250 μg/mL was also tested with apical papilla cells to screen for change of gene expression by RNA sequencing. The result also showed significant upregulation of alpha-internexin (INA). These results indicated that GD water extract might have an inductive effect for neural regeneration and could be used as functional food and supplementation for the prevention or treatment of diabetic neuropathy. This work provided the basic knowledge for further investigations into the benefits of GD for diabetic neuropathy.
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14
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Morphofunctional Characterization of Different Tissue Factors in Congenital Diaphragmatic Hernia Affected Tissue. Diagnostics (Basel) 2021; 11:diagnostics11020289. [PMID: 33673194 PMCID: PMC7918239 DOI: 10.3390/diagnostics11020289] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2021] [Revised: 02/09/2021] [Accepted: 02/10/2021] [Indexed: 12/20/2022] Open
Abstract
Congenital diaphragm hernia (CDH) is a congenital disease that occurs during prenatal development. Although the morbidity and mortality rate is rather significant, the pathogenesis of CDH has been studied insignificantly due to the decreased accessibility of human pathological material. Therefore the aim of our work was to evaluate growth factors (transforming growth factor-beta (TGF-β), basic fibroblast growth factor (bFGF), insulin-like growth factor 1 (IGF-1), hepatocyte growth factor (HGF)) and their receptors (fibroblast growth factor receptor 1 (FGFR1), insulin-like growth factor 1 (IGF-1R)), muscle (dystrophin, myosin, alpha actin) and nerve quality (nerve growth factor (NGF), nerve growth factor receptor (NGFR), neurofilaments (NF)) factors, local defense factors (ß-defensin 2, ß-defensin 4), programmed cell death (TUNEL), and separate gene (Wnt-1) expression in human pathological material to find immunohistochemical marker differences between the control and the CDH patient groups. A semi-quantitative counting method was used for the evaluation of the tissues and structures in the Biotin-Streptavidin-stained slides. Various statistically significant differences were found in immunoreactive expression between the patient and the control group tissue and the morphological structures as well as very strong, strong, and moderate correlations between immunoreactives in different diaphragm cells and structures. These significant changes and various correlations indicate that multiple morphopathogenetic pathways are affected in CDH pathogenesis. This work contains the evaluation of the causes for these changes and their potential involvement in CDH pathogenesis.
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15
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Li Y, Ritchie EM, Steinke CL, Qi C, Chen L, Zheng B, Jin Y. Activation of MAP3K DLK and LZK in Purkinje cells causes rapid and slow degeneration depending on signaling strength. eLife 2021; 10:63509. [PMID: 33475086 PMCID: PMC7870138 DOI: 10.7554/elife.63509] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 01/19/2021] [Indexed: 12/16/2022] Open
Abstract
The conserved MAP3K Dual-Leucine-Zipper Kinase (DLK) and Leucine-Zipper-bearing Kinase (LZK) can activate JNK via MKK4 or MKK7. These two MAP3Ks share similar biochemical activities and undergo auto-activation upon increased expression. Depending on cell-type and nature of insults DLK and LZK can induce pro-regenerative, pro-apoptotic or pro-degenerative responses, although the mechanistic basis of their action is not well understood. Here, we investigated these two MAP3Ks in cerebellar Purkinje cells using loss- and gain-of function mouse models. While loss of each or both kinases does not cause discernible defects in Purkinje cells, activating DLK causes rapid death and activating LZK leads to slow degeneration. Each kinase induces JNK activation and caspase-mediated apoptosis independent of each other. Significantly, deleting CELF2, which regulates alternative splicing of Map2k7, strongly attenuates Purkinje cell degeneration induced by LZK, but not DLK. Thus, controlling the activity levels of DLK and LZK is critical for neuronal survival and health.
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Affiliation(s)
- Yunbo Li
- Neurobiology Section, Division of Biological Sciences, University of California San DiegoLa JollaUnited States
| | - Erin M Ritchie
- Neurobiology Section, Division of Biological Sciences, University of California San DiegoLa JollaUnited States
| | - Christopher L Steinke
- Neurobiology Section, Division of Biological Sciences, University of California San DiegoLa JollaUnited States
| | - Cai Qi
- Neurobiology Section, Division of Biological Sciences, University of California San DiegoLa JollaUnited States
| | - Lizhen Chen
- Neurobiology Section, Division of Biological Sciences, University of California San DiegoLa JollaUnited States
| | - Binhai Zheng
- Department of Neurosciences, School of Medicine, University of California San DiegoLa JollaUnited States,VA San Diego Healthcare SystemSan DiegoUnited States
| | - Yishi Jin
- Neurobiology Section, Division of Biological Sciences, University of California San DiegoLa JollaUnited States,Department of Neurosciences, School of Medicine, University of California San DiegoLa JollaUnited States,Kavli Institute of Brain and Mind, University of California San DiegoLa JollaUnited States
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16
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Abstract
It is increasingly recognized that local protein synthesis (LPS) contributes to fundamental aspects of axon biology, in both developing and mature neurons. Mutations in RNA-binding proteins (RBPs), as central players in LPS, and other proteins affecting RNA localization and translation are associated with a range of neurological disorders, suggesting disruption of LPS may be of pathological significance. In this review, we substantiate this hypothesis by examining the link between LPS and key axonal processes, and the implicated pathophysiological consequences of dysregulated LPS. First, we describe how the length and autonomy of axons result in an exceptional reliance on LPS. We next discuss the roles of LPS in maintaining axonal structural and functional polarity and axonal trafficking. We then consider how LPS facilitates the establishment of neuronal connectivity through regulation of axonal branching and pruning, how it mediates axonal survival into adulthood and its involvement in neuronal stress responses.
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Affiliation(s)
- Julie Qiaojin Lin
- UK Dementia Research Institute at University of Cambridge, Department of Clinical Neurosciences, Island Research Building, Cambridge Biomedical Campus, Cambridge, UK
| | | | - Christine E Holt
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
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17
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Akter F, Yu X, Qin X, Yao S, Nikrouz P, Syed YA, Kotter M. The Pathophysiology of Degenerative Cervical Myelopathy and the Physiology of Recovery Following Decompression. Front Neurosci 2020; 14:138. [PMID: 32425740 PMCID: PMC7203415 DOI: 10.3389/fnins.2020.00138] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2019] [Accepted: 02/03/2020] [Indexed: 12/15/2022] Open
Abstract
Background: Degenerative cervical myelopathy (DCM), also known as cervical spondylotic myelopathy is the leading cause of spinal cord compression in adults. The mainstay of treatment is surgical decompression, which leads to partial recovery of symptoms, however, long term prognosis of the condition remains poor. Despite advances in treatment methods, the underlying pathobiology is not well-known. A better understanding of the disease is therefore required for the development of treatments to improve outcomes following surgery. Objective: To systematically evaluate the pathophysiology of DCM and the mechanism underlying recovery following decompression. Methods: A total of 13,808 published articles were identified in our systematic search of electronic databases (PUBMED, WEB OF SCIENCE). A total of 51 studies investigating the secondary injury mechanisms of DCM or physiology of recovery in animal models of disease underwent comprehensive review. Results: Forty-seven studies addressed the pathophysiology of DCM. Majority of the studies demonstrated evidence of neuronal loss following spinal cord compression. A number of studies provided further details of structural changes in neurons such as myelin damage and axon degeneration. The mechanisms of injury to cells included direct apoptosis and increased inflammation. Only four papers investigated the pathobiological changes that occur in spinal cords following decompression. One study demonstrated evidence of axonal plasticity following decompressive surgery. Another study demonstrated ischaemic-reperfusion injury following decompression, however this phenomenon was worse when decompression was delayed. Conclusions: In preclinical studies, the pathophysiology of DCM has been poorly studied and a number of questions remain unanswered. The physiological changes seen in the decompressed spinal cord has not been widely investigated and it is paramount that researchers investigate the decompressed spinal cord further to enable the development of therapeutic tools, to enhance recovery following surgery.
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Affiliation(s)
- Farhana Akter
- Department of Clinical Neuroscience, University of Cambridge, Cambridge, United Kingdom.,Faculty of Arts and Sciences, Harvard University, Cambridge, MA, United States.,Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, United States
| | - Xinming Yu
- Department of Clinical Neuroscience, University of Cambridge, Cambridge, United Kingdom
| | - Xingping Qin
- Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA, United States
| | - Shun Yao
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Parisa Nikrouz
- Maidstone and Tunbridge Wells Trust, Maidstone, United Kingdom
| | - Yasir Ahmed Syed
- Neuroscience and Mental Health Research Institute (NMHRI), Cathays, United Kingdom.,School of Bioscience, Cardiff University, The Sir Martin Evans Building, Cardiff, United Kingdom
| | - Mark Kotter
- Department of Clinical Neuroscience, University of Cambridge, Cambridge, United Kingdom
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18
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Guo L, Davis BM, Ravindran N, Galvao J, Kapoor N, Haamedi N, Shamsher E, Luong V, Fico E, Cordeiro MF. Topical recombinant human Nerve growth factor (rh-NGF) is neuroprotective to retinal ganglion cells by targeting secondary degeneration. Sci Rep 2020; 10:3375. [PMID: 32099056 PMCID: PMC7042238 DOI: 10.1038/s41598-020-60427-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2018] [Accepted: 01/16/2020] [Indexed: 12/13/2022] Open
Abstract
Optic neuropathy is a major cause of irreversible blindness worldwide, and no effective treatment is currently available. Secondary degeneration is believed to be the major contributor to retinal ganglion cell (RGC) death, the endpoint of optic neuropathy. Partial optic nerve transection (pONT) is an established model of optic neuropathy. Although the mechanisms of primary and secondary degeneration have been delineated in this model, until now how this is influenced by therapy is not well-understood. In this article, we describe a clinically translatable topical, neuroprotective treatment (recombinant human nerve growth factor, rh-NGF) predominantly targeting secondary degeneration in a pONT rat model. Topical application of rh-NGF twice daily for 3 weeks significantly improves RGC survival as shown by reduced RGC apoptosis in vivo and increased RGC population in the inferior retina, which is predominantly affected in this model by secondary degeneration. Topical rh-NGF also promotes greater axonal survival and inhibits astrocyte activity in the optic nerve. Collectively, these results suggest that topical rh-NGF exhibits neuroprotective effects on retinal neurons via influencing secondary degeneration process. As topical rh-NGF is already involved in early clinical trials, this highlights its potential in multiple indications in patients, including those affected by glaucomatous optic neuropathy.
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Affiliation(s)
- Li Guo
- Glaucoma & Retinal Neurodegeneration Research Group, Institute of Ophthalmology, University College London, London, United Kingdom.
| | - Benjamin M Davis
- Glaucoma & Retinal Neurodegeneration Research Group, Institute of Ophthalmology, University College London, London, United Kingdom
| | - Nivedita Ravindran
- Glaucoma & Retinal Neurodegeneration Research Group, Institute of Ophthalmology, University College London, London, United Kingdom
| | - Joana Galvao
- Glaucoma & Retinal Neurodegeneration Research Group, Institute of Ophthalmology, University College London, London, United Kingdom
| | - Neel Kapoor
- Glaucoma & Retinal Neurodegeneration Research Group, Institute of Ophthalmology, University College London, London, United Kingdom
| | - Nasrin Haamedi
- Glaucoma & Retinal Neurodegeneration Research Group, Institute of Ophthalmology, University College London, London, United Kingdom
| | - Ehtesham Shamsher
- Glaucoma & Retinal Neurodegeneration Research Group, Institute of Ophthalmology, University College London, London, United Kingdom
| | - Vy Luong
- Glaucoma & Retinal Neurodegeneration Research Group, Institute of Ophthalmology, University College London, London, United Kingdom
| | - Elena Fico
- Glaucoma & Retinal Neurodegeneration Research Group, Institute of Ophthalmology, University College London, London, United Kingdom.,Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, L'Aquila, Italy
| | - M Francesca Cordeiro
- Glaucoma & Retinal Neurodegeneration Research Group, Institute of Ophthalmology, University College London, London, United Kingdom. .,Western Eye Hospital, Imperial College Healthcare NHS Trust, London, United Kingdom.
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19
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Kumar A, Xu Y, Du Y. Stem Cells from Human Trabecular Meshwork Hold the Potential to Develop into Ocular and Non-Ocular Lineages After Long-Term Storage. Stem Cells Dev 2020; 29:49-61. [PMID: 31680626 PMCID: PMC6931915 DOI: 10.1089/scd.2019.0169] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2019] [Accepted: 11/01/2019] [Indexed: 01/10/2023] Open
Abstract
Stem cells from the eye hold a great potential for vision restoration and can also be used for regeneration in other tissues. In this study, we characterized the stem cell properties of Trabecular meshwork stem cells (TMSCs) after long-term cryopreservation (∼8 years). TMSCs derived from four donors were examined for their viability and proliferation, as well as stem cell marker expression. Spheroid formation, colony formation, and multipotency were investigated. We observed that TMSCs were fully viable with variable proliferation ability. They expressed the stem cell markers CD90, CD166, CD105, CD73, OCT4, SSEA4, Notch1, KLF4, ABCG2, Nestin, and HNK1 detected by flow cytometry, quantitative polymerase chain reaction, or immunofluorescent staining. They could form spheroids and colonies after thawing. All TMSCs were able to differentiate into osteocytes, neural cells, and trabecular meshwork (TM) cells, but not adipocytes. Differentiated TM cells responded to dexamethasone treatment with increased expression of myocilin and angiopoietin-like 7 (ANGPTL7). In a nutshell, our study demonstrated that TMSCs retain their stem cell properties after long-term cryopreservation and hence can be an effective cell therapy source for various clinical applications.
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Affiliation(s)
- Ajay Kumar
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Yi Xu
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Yiqin Du
- Department of Ophthalmology, University of Pittsburgh, Pittsburgh, Pennsylvania
- Department of Developmental Biology, University of Pittsburgh, Pittsburgh, Pennsylvania
- McGowan Institute for Regenerative Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
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20
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Gilmour A, Poole-Warren L, Green RA. An Improved in vitro Model of Cortical Tissue. Front Neurosci 2019; 13:1349. [PMID: 31920510 PMCID: PMC6928009 DOI: 10.3389/fnins.2019.01349] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 12/02/2019] [Indexed: 11/20/2022] Open
Abstract
Intracortical electrodes for brain-machine interfaces rely on intimate contact with tissues for recording signals and stimulating neurons. However, the long-term viability of intracortical electrodes in vivo is poor, with a major contributing factor being the development of a glial scar. In vivo approaches for evaluating responses to intracortical devices are resource intensive and complex, making statistically significant, high throughput data difficult to obtain. In vitro models provide an alternative to in vivo studies; however, existing approaches have limitations which restrict the translation of the cellular reactions to the implant scenario. Notably, there is no current robust model that includes astrocytes, microglia, oligodendrocytes and neurons, the four principle cell types, critical to the health, function and wound responses of the central nervous system (CNS). In previous research a co-culture of primary mouse mature mixed glial cells and immature neural precursor cells were shown to mimic several key properties of the CNS response to implanted electrode materials. However, the method was not robust and took up to 63 days, significantly affecting reproducibility and widespread use for assessing brain-material interactions. In the current research a new co-culture approach has been developed and evaluated using immunocytochemistry and quantitative polymerase chain reaction (qPCR). The resulting method reduced the time in culture significantly and the culture model was shown to have a genetic signature similar to that of healthy adult mouse brain. This new robust CNS culture model has the potential to significantly improve the capacity to translate in vitro data to the in vivo responses.
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Affiliation(s)
- Aaron Gilmour
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, NSW, Australia
- Clem Jones Centre for Neurobiology and Stem Cell Research, Menzies Health Institute Queensland, Griffiths University, Gold Coast, QLD, Australia
| | - Laura Poole-Warren
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, NSW, Australia
| | - Rylie A Green
- Graduate School of Biomedical Engineering, University of New South Wales, Sydney, NSW, Australia
- Department of Bioengineering, Imperial College London, London, United Kingdom
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21
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The evolution and multi-molecular properties of NF1 cutaneous neurofibromas originating from C-fiber sensory endings and terminal Schwann cells at normal sites of sensory terminations in the skin. PLoS One 2019; 14:e0216527. [PMID: 31107888 PMCID: PMC6527217 DOI: 10.1371/journal.pone.0216527] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 04/24/2019] [Indexed: 12/30/2022] Open
Abstract
In addition to large plexiform neurofibromas (pNF), NF1 patients are frequently disfigured by cutaneous neurofibromas (cNF) and are often afflicted with chronic pain and itch even from seemingly normal skin areas. Both pNFs and cNF consist primarily of benign hyperproliferating nonmyelinating Schwann cells (nSC). While pNF clearly arise within deep nerves and plexuses, the role of cutaneous innervation in the origin of cNF and in chronic itch and pain is unknown. First, we conducted a comprehensive, multi-molecular, immunofluorescence (IF) analyses on 3mm punch biopsies from three separate locations in normal appearing, cNF-free skin in 19 NF1 patients and skin of 16 normal subjects. At least one biopsy in 17 NF1 patients had previously undescribed micro-lesions consisting of a small, dense cluster of nonpeptidergic C-fiber endings and the affiliated nSC consistently adjoining adnexal structures—dermal papillae, hair follicles, sweat glands, sweat ducts, and arterioles—where C-fiber endings normally terminate. Similar micro-lesions were detected in hind paw skin of mice with conditionally-induced SC Nf1-/- mutations. Hypothesizing that these microlesions were pre-cNF origins of cNF, we subsequently analyzed numerous overt, small cNF (s-cNF, 3–6 mm) and discovered that each had an adnexal structure at the epicenter of vastly increased nonpeptidergic C-fiber terminals, accompanied by excessive nSC. The IF and functional genomics assays indicated that neurturin (NTRN) and artemin (ARTN) signaling through cRET kinase and GFRα2 and GFRα3 co-receptors on the aberrant C-fiber endings and nSC may mutually promote the onset of pre-cNF and their evolution to s-cNF. Moreover, TrpA1 and TrpV1 receptors may, respectively, mediate symptoms of chronic itch and pain. These newly discovered molecular characteristics might be targeted to suppress the development of cNF and to treat chronic itch and pain symptoms in NF1 patients.
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Zavodska M, Galik J, Marsala M, Papcunova S, Pavel J, Racekova E, Martoncikova M, Sulla I, Gajdos M, Lukac I, Kafka J, Ledecky V, Sulla I, Reichel P, Trbolova A, Capik I, Bimbova K, Bacova M, Stropkovska A, Kisucka A, Miklisova D, Lukacova N. Hypothermic treatment after computer-controlled compression in minipig: A preliminary report on the effect of epidural vs. direct spinal cord cooling. Exp Ther Med 2018; 16:4927-4942. [PMID: 30542449 PMCID: PMC6257352 DOI: 10.3892/etm.2018.6831] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Accepted: 06/29/2018] [Indexed: 11/24/2022] Open
Abstract
The aim of the present study was to investigate the therapeutic efficacy of local hypothermia (beginning 30 min post-injury persisting for 5 h) on tissue preservation along the rostro-caudal axis of the spinal cord (3 cm cranially and caudally from the lesion site), and the prevention of injury-induced functional loss in a newly developed computer-controlled compression model in minipig (force of impact 18N at L3 level), which mimics severe spinal cord injury (SCI). Minipigs underwent SCI with two post-injury modifications (durotomy vs. intact dura mater) followed by hypothermia through a perfusion chamber with cold (epidural t≈15°C) saline, DMEM/F12 or enriched DMEM/F12 (SCI/durotomy group) and with room temperature (t≈24°C) saline (SCI-only group). Minipigs treated with post-SCI durotomy demonstrated slower development of spontaneous neurological improvement at the early postinjury time points, although the outcome at 9 weeks of survival did not differ significantly between the two SCI groups. Hypothermia with saline (t≈15°C) applied after SCI-durotomy improved white matter integrity in the dorsal and lateral columns in almost all rostro-caudal segments, whereas treatment with medium/enriched medium affected white matter integrity only in the rostral segments. Furthermore, regeneration of neurofilaments in the spinal cord after SCI-durotomy and hypothermic treatments indicated an important role of local saline hypothermia in the functional outcome. Although saline hypothermia (24°C) in the SCI-only group exhibited a profound histological outcome (regarding the gray and white matter integrity and the number of motoneurons) and neurofilament protection in general, none of the tested treatments resulted in significant improvement of neurological status. The findings suggest that clinically-proven medical treatments for SCI combined with early 5 h-long saline hypothermia treatment without opening the dural sac could be more beneficial for tissue preservation and neurological outcome compared with hypothermia applied after durotomy.
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Affiliation(s)
- Monika Zavodska
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Jan Galik
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Martin Marsala
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia.,Department of Anesthesiology, Neuroregeneration Laboratory, University of California-San Diego, San Diego, CA 92093, USA
| | - Stefania Papcunova
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Jaroslav Pavel
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Eniko Racekova
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Marcela Martoncikova
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Igor Sulla
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia.,Hospital of Slovak Railways, 040 01 Košice, Slovakia
| | - Miroslav Gajdos
- Department of Neurosurgery, Faculty of Medicine, University of Pavol Jozef Safarik, 040 66 Košice, Slovakia
| | - Imrich Lukac
- Department of Neurosurgery, Faculty of Medicine, University of Pavol Jozef Safarik, 040 66 Košice, Slovakia
| | - Jozef Kafka
- Department of Neurosurgery, Faculty of Medicine, University of Pavol Jozef Safarik, 040 66 Košice, Slovakia
| | - Valent Ledecky
- Department of Small Animal Clinic, University of Veterinary Medicine and Pharmacy, 041 81 Košice, Slovakia
| | - Igor Sulla
- Department of Small Animal Clinic, University of Veterinary Medicine and Pharmacy, 041 81 Košice, Slovakia
| | - Peter Reichel
- Department of Small Animal Clinic, University of Veterinary Medicine and Pharmacy, 041 81 Košice, Slovakia
| | - Alexandra Trbolova
- Department of Small Animal Clinic, University of Veterinary Medicine and Pharmacy, 041 81 Košice, Slovakia
| | - Igor Capik
- Department of Small Animal Clinic, University of Veterinary Medicine and Pharmacy, 041 81 Košice, Slovakia
| | - Katarina Bimbova
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Maria Bacova
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Andrea Stropkovska
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Alexandra Kisucka
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Dana Miklisova
- Department of Vector-borne Diseases, Institute of Parasitology, Slovak Academy of Sciences, 040 01 Košice, Slovakia
| | - Nadezda Lukacova
- Institute of Neurobiology, Biomedical Research Center, Slovak Academy of Sciences, 040 01 Košice, Slovakia
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23
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Marques TM, van Rumund A, Bruinsma IB, Wessels HJCT, Gloerich J, Esselink RAJ, Bloem BR, Kuiperij HB, Verbeek MM. Cerebrospinal Fluid Galectin-1 Levels Discriminate Patients with Parkinsonism from Controls. Mol Neurobiol 2018; 56:5067-5074. [PMID: 30465235 PMCID: PMC6647396 DOI: 10.1007/s12035-018-1426-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2018] [Accepted: 11/13/2018] [Indexed: 01/08/2023]
Abstract
Parkinson’s disease (PD) is the second most common neurodegenerative disorder in elderly people. Currently, the diagnosis of PD is based on neurological examination, neuroimaging, and the response to dopaminergic medication. The diagnosis can be challenging, especially at early disease stages, when the symptoms of patients with atypical parkinsonism (APD) may strongly overlap. Therefore, reliable biomarkers that are able to identify patients with PD are much needed. Here, we aimed to identify and validate new biomarkers for PD in cerebrospinal fluid (CSF). We performed a profiling experiment using mass spectrometry (MS) of CSF from ten PD patients and ten matched non-neurological controls. We selected one protein, galectin-1 (Gal-1), which was differentially expressed in PD vs. controls, and quantified its concentrations in CSF by enzyme-linked immunosorbent assay (ELISA) in three new cohorts of 37 PD patients, 21 APD patients, and 44 controls. CSF levels of Gal-1 were lower in PD in both the discovery and validation experiments and discriminated PD from controls with moderate–high accuracy levels (ELISA: area under the curve = 0.7). Similar levels of Gal-1 were found in PD and APD. Gal-1 levels were correlated to age in all groups and correlated in the PD patients to CSF levels of total tau, phosphorylated tau, neurofilament light chain (NFL), and the mini-mental state examination (MMSE) score. We conclude that MS profiling of proteins may be a useful tool to identify novel biomarkers of neurological diseases and that CSF Gal-1 levels may discriminate PD from non-neurological controls.
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Affiliation(s)
- Tainá M Marques
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
- Parkinson Center Nijmegen, Nijmegen, The Netherlands
| | - Anouke van Rumund
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
- Parkinson Center Nijmegen, Nijmegen, The Netherlands
| | - Ilona B Bruinsma
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Hans J C T Wessels
- Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Jolein Gloerich
- Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Rianne A J Esselink
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
- Parkinson Center Nijmegen, Nijmegen, The Netherlands
| | - Bastiaan R Bloem
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
- Parkinson Center Nijmegen, Nijmegen, The Netherlands
| | - H Bea Kuiperij
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
- Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Marcel M Verbeek
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands.
- Department of Laboratory Medicine, Radboud University Medical Center, Nijmegen, The Netherlands.
- Parkinson Center Nijmegen, Nijmegen, The Netherlands.
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24
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Bhambri A, Dhaunta N, Patel SS, Hardikar M, Bhatt A, Srikakulam N, Shridhar S, Vellarikkal S, Pandey R, Jayarajan R, Verma A, Kumar V, Gautam P, Khanna Y, Khan JA, Fromm B, Peterson KJ, Scaria V, Sivasubbu S, Pillai B. Large scale changes in the transcriptome of Eisenia fetida during regeneration. PLoS One 2018; 13:e0204234. [PMID: 30260966 PMCID: PMC6160089 DOI: 10.1371/journal.pone.0204234] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2018] [Accepted: 09/05/2018] [Indexed: 12/16/2022] Open
Abstract
Earthworms show a wide spectrum of regenerative potential with certain species like Eisenia fetida capable of regenerating more than two-thirds of their body while other closely related species, such as Paranais litoralis seem to have lost this ability. Earthworms belong to the phylum Annelida, in which the genomes of the marine oligochaete Capitella telata and the freshwater leech Helobdella robusta have been sequenced and studied. Herein, we report the transcriptomic changes in Eisenia fetida (Indian isolate) during regeneration. Following injury, E. fetida regenerates the posterior segments in a time spanning several weeks. We analyzed gene expression changes both in the newly regenerating cells and in the adjacent tissue, at early (15days post amputation), intermediate (20days post amputation) and late (30 days post amputation) by RNAseq based de novo assembly and comparison of transcriptomes. We also generated a draft genome sequence of this terrestrial red worm using short reads and mate-pair reads. An in-depth analysis of the miRNome of the worm showed that many miRNA gene families have undergone extensive duplications. Sox4, a master regulator of TGF-beta mediated epithelial-mesenchymal transition was induced in the newly regenerated tissue. Genes for several proteins such as sialidases and neurotrophins were identified amongst the differentially expressed transcripts. The regeneration of the ventral nerve cord was also accompanied by the induction of nerve growth factor and neurofilament genes. We identified 315 novel differentially expressed transcripts in the transcriptome, that have no homolog in any other species. Surprisingly, 82% of these novel differentially expressed transcripts showed poor potential for coding proteins, suggesting that novel ncRNAs may play a critical role in regeneration of earthworm.
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Affiliation(s)
- Aksheev Bhambri
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
- Academy of Scientific & Innovative Research (AcSIR), Mathura Road, Delhi, India
| | - Neeraj Dhaunta
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Surendra Singh Patel
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
- Academy of Scientific & Innovative Research (AcSIR), Mathura Road, Delhi, India
| | - Mitali Hardikar
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Abhishek Bhatt
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Nagesh Srikakulam
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Shruti Shridhar
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Shamsudheen Vellarikkal
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
- Academy of Scientific & Innovative Research (AcSIR), Mathura Road, Delhi, India
| | - Rajesh Pandey
- CSIR Ayurgenomics Unit - TRISUTRA, CSIR-IGIB, New Delhi, India
| | - Rijith Jayarajan
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Ankit Verma
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Vikram Kumar
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Pradeep Gautam
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | - Yukti Khanna
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
| | | | - Bastian Fromm
- Science for Life Laboratory, Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, Stockholm, Sweden
| | - Kevin J. Peterson
- Department of Biological Sciences, Dartmouth College, Hanover, New Hampshire, United States of America
| | - Vinod Scaria
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
- Academy of Scientific & Innovative Research (AcSIR), Mathura Road, Delhi, India
| | - Sridhar Sivasubbu
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
- Academy of Scientific & Innovative Research (AcSIR), Mathura Road, Delhi, India
| | - Beena Pillai
- CSIR – Institute of Genomics and Integrative Biology, Mathura Road, New Delhi, India
- Academy of Scientific & Innovative Research (AcSIR), Mathura Road, Delhi, India
- * E-mail:
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25
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A Single Dose of Atorvastatin Applied Acutely after Spinal Cord Injury Suppresses Inflammation, Apoptosis, and Promotes Axon Outgrowth, Which Might Be Essential for Favorable Functional Outcome. Int J Mol Sci 2018; 19:ijms19041106. [PMID: 29642434 PMCID: PMC5979414 DOI: 10.3390/ijms19041106] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/12/2018] [Accepted: 04/05/2018] [Indexed: 02/06/2023] Open
Abstract
The aim of our study was to limit the inflammatory response after a spinal cord injury (SCI) using Atorvastatin (ATR), a potent inhibitor of cholesterol biosynthesis. Adult Wistar rats were divided into five experimental groups: one control group, two Th9 compression (40 g/15 min) groups, and two Th9 compression + ATR (5 mg/kg, i.p.) groups. The animals survived one day and six weeks. ATR applied in a single dose immediately post-SCI strongly reduced IL-1β release at 4 and 24 h and considerably reduced the activation of resident cells at one day post-injury. Acute ATR treatment effectively prevented the excessive infiltration of destructive M1 macrophages cranially, at the lesion site, and caudally (by 66%, 62%, and 52%, respectively) one day post-injury, whereas the infiltration of beneficial M2 macrophages was less affected (by 27%, 41%, and 16%). In addition, at the same time point, ATR visibly decreased caspase-3 cleavage in neurons, astrocytes, and oligodendrocytes. Six weeks post-SCI, ATR increased the expression of neurofilaments in the dorsolateral columns and Gap43-positive fibers in the lateral columns around the epicenter, and from day 30 to 42, significantly improved the motor activity of the hindlimbs. We suggest that early modulation of the inflammatory response via effects on the M1/M2 macrophages and the inhibition of caspase-3 expression could be crucial for the functional outcome.
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26
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Klemann C, Visser J, Van Den Bosch L, Martens G, Poelmans G. Integrated molecular landscape of amyotrophic lateral sclerosis provides insights into disease etiology. Brain Pathol 2018; 28:203-211. [PMID: 28035716 PMCID: PMC8028446 DOI: 10.1111/bpa.12485] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 12/23/2016] [Indexed: 12/12/2022] Open
Abstract
Amyotrophic lateral sclerosis (ALS) is a severe, progressive and ultimately fatal motor neuron disease caused by a combination of genetic and environmental factors, but its underlying mechanisms are largely unknown. To gain insight into the etiology of ALS, we here conducted genetic network and literature analyses of the top-ranked findings from six genome-wide association studies of sporadic ALS (involving 3589 cases and 8577 controls) as well as genes implicated in ALS etiology through other evidence, including familial ALS candidate gene association studies. We integrated these findings into a molecular landscape of ALS that allowed the identification of three main processes that interact with each other and are crucial to maintain axonal functionality, especially of the long axons of motor neurons, i.e. (1) Rho-GTPase signaling; (2) signaling involving the three regulatory molecules estradiol, folate, and methionine; and (3) ribonucleoprotein granule functioning and axonal transport. Interestingly, estradiol signaling is functionally involved in all three cascades and as such an important mediator of the molecular ALS landscape. Furthermore, epidemiological findings together with an analysis of possible gender effects in our own cohort of sporadic ALS patients indicated that estradiol may be a protective factor, especially for bulbar-onset ALS. Taken together, our molecular landscape of ALS suggests that abnormalities within three interconnected molecular processes involved in the functioning and maintenance of motor neuron axons are important in the etiology of ALS. Moreover, estradiol appears to be an important modulator of the ALS landscape, providing important clues for the development of novel disease-modifying treatments.
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Affiliation(s)
- C.J.H.M. Klemann
- Department of Molecular Animal PhysiologyDonders Institute for Brain, Cognition and Behaviour, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud UniversityNijmegenThe Netherlands
| | - J.E. Visser
- Department of Molecular Animal PhysiologyDonders Institute for Brain, Cognition and Behaviour, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud UniversityNijmegenThe Netherlands
- Department of NeurologyDonders Institute for Brain, Cognition and Behaviour, Radboud University Medical CenterNijmegenThe Netherlands
- Department of NeurologyAmphia HospitalBredaThe Netherlands
| | - L. Van Den Bosch
- Department of NeurosciencesLaboratory of Neurobiology, Experimental Neurology, KU Leuven and VIB, Vesalius Research CenterLeuvenBelgium
| | - G.J.M. Martens
- Department of Molecular Animal PhysiologyDonders Institute for Brain, Cognition and Behaviour, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud UniversityNijmegenThe Netherlands
| | - G. Poelmans
- Department of Molecular Animal PhysiologyDonders Institute for Brain, Cognition and Behaviour, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud UniversityNijmegenThe Netherlands
- Department of Human GeneticsRadboud University Medical CenterNijmegenThe Netherlands
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27
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Ren K, Dai Y, Yi K, Kinoshita M, Itoh M, Sakata I, Sakai T, Yi SQ. Using a Whole-mount Immunohistochemical Method to Study the Innervation of the Biliary Tract in Suncus murinus. J Vis Exp 2017. [PMID: 28654062 DOI: 10.3791/55483] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022] Open
Abstract
This work describes the whole-mount immunohistochemistry staining method in detail, using neurofilament protein antibody to label the innervation of the biliary tract in Suncus murinus (S. murinus ). First, the specimen was dissected from S. murinus and fixed in 4% paraformaldehyde (PFA). Second, an enzymatic treatment and potential endogenous peroxidase inactivation were performed. The specimen was then exposed to the primary antibody, anti-neurofilament protein antibody, for 3-6 days. It was then incubated with the secondary antibody conjugated with horseradish peroxidase. The color reaction was revealed by reacting the specimen with a 3,3'-diaminobenzidine (DAB) substrate. This method can be applied to analyze the innervation of all visceral organs. Furthermore, this protocol can also be adapted to test other neuronal antibodies, but optimization of the antibodies should be done first. This method was originally introduced by Kuratani and Tanaka1,2,3.
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Affiliation(s)
- Ke Ren
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
| | - Yidan Dai
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
| | - Kai Yi
- Department of Anatomy, Tokyo Medical University
| | - Masanobu Kinoshita
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University
| | | | - Ichiro Sakata
- Area of Regulatory Biology, Division of Life Science, Graduate School of Science and Engineering, Saitama University
| | - Takafumi Sakai
- Area of Regulatory Biology, Division of Life Science, Graduate School of Science and Engineering, Saitama University
| | - Shuang-Qin Yi
- Department of Frontier Health Sciences, Graduate School of Human Health Sciences, Tokyo Metropolitan University;
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28
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Mills EA, Mirza A, Mao-Draayer Y. Emerging Approaches for Validating and Managing Multiple Sclerosis Relapse. Front Neurol 2017; 8:116. [PMID: 28424654 PMCID: PMC5372802 DOI: 10.3389/fneur.2017.00116] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Accepted: 03/14/2017] [Indexed: 12/17/2022] Open
Abstract
The autoimmune disease multiple sclerosis (MS) is characterized by relapses in the majority of patients. A definitive clinical diagnosis of relapse in MS can be complicated by the presence of an infection or comorbid disorder. In this mini-review, we describe efforts to develop enhanced imaging techniques and biomarker detection as future tools for relapse validation. There is emerging evidence of roles for meningeal inflammation, sex hormones, comorbid metabolic or mood disorders, and a dysregulated immune profile in the manifestation and severity of relapse. Specific subsets of immune cells likely drive the pathophysiology of relapse, and identification of a patient's unique immunological signature of relapse may help guide future diagnosis and treatment. Finally, these studies highlight the diversity in terms of relapse presentation, immunological signature, and response in patients with MS, indicating that going forward the best approach to assessment and treatment of relapse will be multifactorial and highly personalized.
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Affiliation(s)
- Elizabeth A Mills
- Molecular and Behavioral Neuroscience Institute, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Ali Mirza
- Graduate Program in Immunology, Program in Biomedical Sciences, University of Michigan Medical School, Ann Arbor, MI, USA
| | - Yang Mao-Draayer
- Graduate Program in Immunology, Program in Biomedical Sciences, University of Michigan Medical School, Ann Arbor, MI, USA.,Department of Neurology, University of Michigan Medical School, Ann Arbor, MI, USA
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29
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Nardo G, Trolese MC, de Vito G, Cecchi R, Riva N, Dina G, Heath PR, Quattrini A, Shaw PJ, Piazza V, Bendotti C. Immune response in peripheral axons delays disease progression in SOD1 G93A mice. J Neuroinflammation 2016; 13:261. [PMID: 27717377 PMCID: PMC5055725 DOI: 10.1186/s12974-016-0732-2] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 09/23/2016] [Indexed: 11/16/2022] Open
Abstract
Background Increasing evidence suggests that the immune system has a beneficial role in the progression of amyotrophic lateral sclerosis (ALS) although the mechanism remains unclear. Recently, we demonstrated that motor neurons (MNs) of C57SOD1G93A mice with slow disease progression activate molecules classically involved in the cross-talk with the immune system. This happens a lot less in 129SvSOD1G93A mice which, while expressing the same amount of transgene, had faster disease progression and earlier axonal damage. The present study investigated whether and how the immune response is involved in the preservation of motor axons in the mouse model of familial ALS with a more benign disease course. Methods First, the extent of axonal damage, Schwann cell proliferation, and neuromuscular junction (NMJ) denervation were compared between the two ALS mouse models at the disease onset. Then, we compared the expression levels of different immune molecules, the morphology of myelin sheaths, and the presence of blood-derived immune cell infiltrates in the sciatic nerve of the two SOD1G93A mouse strains using immunohistochemical, immunoblot, quantitative reverse transcription PCR, and rotating-polarization Coherent Anti-Stokes Raman Scattering techniques. Results Muscle denervation, axonal dysregulation, and myelin disruption together with reduced Schwann cell proliferation are prominent in 129SvSOD1G93A compared to C57SOD1G93A mice at the disease onset, and this correlates with a faster disease progression in the first strain. On the contrary, a striking increase of immune molecules such as CCL2, MHCI, and C3 was seen in sciatic nerves of slow progressor C57SOD1G93A mice and this was accompanied by heavy infiltration of CD8+ T lymphocytes and macrophages. These phenomena were not detectable in the peripheral nervous system of fast-progressing mice. Conclusions These data show for the first time that damaged MNs in SOD1-related ALS actively recruit immune cells in the peripheral nervous system to delay muscle denervation and prolong the lifespan. On the contrary, the lack of this response has a negative impact on the disease course. Electronic supplementary material The online version of this article (doi:10.1186/s12974-016-0732-2) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Giovanni Nardo
- Laboratory of Molecular Neurobiology, Department of Neuroscience, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Via La Masa 19, 20156, Milan, Italy.
| | - Maria Chiara Trolese
- Laboratory of Molecular Neurobiology, Department of Neuroscience, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Via La Masa 19, 20156, Milan, Italy
| | - Giuseppe de Vito
- NEST, Scuola Normale Superiore, Piazza San Silvestro 12, I-56127, Pisa, Italy.,Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, I-56127, Pisa, Italy
| | - Roberta Cecchi
- NEST, Scuola Normale Superiore, Piazza San Silvestro 12, I-56127, Pisa, Italy
| | - Nilo Riva
- Neuropathology Unit, Department of Neurology, INSPE, San Raffaele Scientific Institute, Dibit II, Via Olgettina 48, 20132, Milan, Italy
| | - Giorgia Dina
- Neuropathology Unit, Department of Neurology, INSPE, San Raffaele Scientific Institute, Dibit II, Via Olgettina 48, 20132, Milan, Italy
| | - Paul R Heath
- Department of Neuroscience, Academic Neurology Unit, Faculty of Medicine, Dentistry and Health, Sheffield Institute for Translational Neuroscience, University of Sheffield, 385 Glossop Road, Sheffield, S10 2HQ, UK
| | - Angelo Quattrini
- Neuropathology Unit, Department of Neurology, INSPE, San Raffaele Scientific Institute, Dibit II, Via Olgettina 48, 20132, Milan, Italy
| | - Pamela J Shaw
- Department of Neuroscience, Academic Neurology Unit, Faculty of Medicine, Dentistry and Health, Sheffield Institute for Translational Neuroscience, University of Sheffield, 385 Glossop Road, Sheffield, S10 2HQ, UK
| | - Vincenzo Piazza
- Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Piazza San Silvestro 12, I-56127, Pisa, Italy
| | - Caterina Bendotti
- Laboratory of Molecular Neurobiology, Department of Neuroscience, IRCCS - Istituto di Ricerche Farmacologiche Mario Negri, Via La Masa 19, 20156, Milan, Italy.
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Deng L, Hou L, Zhang J, Tang X, Cheng Z, Li G, Fang X, Xu J, Zhang X, Xu R. Polymorphism of rs3737597 in DISC1 Gene on Chromosome 1q42.2 in sALS Patients: a Chinese Han Population Case-Control Study. Mol Neurobiol 2016; 54:3162-3179. [DOI: 10.1007/s12035-016-9869-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Accepted: 03/17/2016] [Indexed: 01/10/2023]
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Stankowska DL, Minton AZ, Rutledge MA, Mueller BH, Phatak NR, He S, Ma HY, Forster MJ, Yorio T, Krishnamoorthy RR. Neuroprotective effects of transcription factor Brn3b in an ocular hypertension rat model of glaucoma. Invest Ophthalmol Vis Sci 2015; 56:893-907. [PMID: 25587060 DOI: 10.1167/iovs.14-15008] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
PURPOSE Glaucoma is an optic neuropathy commonly associated with elevated intraocular pressure (IOP), leading to optic nerve head (ONH) cupping, axon loss, and apoptosis of retinal ganglion cells (RGCs), which could ultimately result in blindness. Brn3b is a class-4 POU domain transcription factor that plays a key role in RGC development, axon outgrowth, and pathfinding. Previous studies suggest that a decrease in Brn3b levels occurs in animal models of glaucoma. The goal of this study was to determine if adeno-associated virus (AAV)-directed overexpression of the Brn3b protein could have neuroprotective effects following elevated IOP-mediated neurodegeneration. METHODS Intraocular pressure was elevated in one eye of Brown Norway rats (Rattus norvegicus), following which the IOP-elevated eyes were intravitreally injected with AAV constructs encoding either the GFP (rAAV-CMV-GFP and rAAV-hsyn-GFP) or Brn3b (rAAV-CMV-Brn3b and rAAV-hsyn-Brn3b). Retina sections through the ONH were stained for synaptic plasticity markers and neuroprotection was assessed by RGC counts and visual acuity tests. RESULTS Adeno-associated virus-mediated expression of the Brn3b protein in IOP-elevated rat eyes promoted an upregulation of growth associated protein-43 (GAP-43), actin binding LIM protein (abLIM) and acetylated α-tubulin (ac-Tuba) both posterior to the ONH and in RGCs. The RGC survival as well as axon integrity score were significantly improved in IOP-elevated rAAV-hsyn-Brn3b-injected rats compared with those of the IOP-elevated rAAV-hsyn-GFP- injected rats. Additionally, intravitreal rAAV-hsyn-Brn3b administration significantly restored the visual optomotor response in IOP-elevated rat eyes. CONCLUSIONS Adeno-associated virus-mediated Brn3b protein expression may be a suitable approach for promoting neuroprotection in animal models of glaucoma.
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Affiliation(s)
- Dorota L Stankowska
- University of North Texas Health Science Center, Department of Cell Biology and Immunology, North Texas Eye Research Institute, Fort Worth, Texas, United States
| | - Alena Z Minton
- University of North Texas Health Science Center, Department of Cell Biology and Immunology, North Texas Eye Research Institute, Fort Worth, Texas, United States
| | - Margaret A Rutledge
- University of North Texas Health Science Center, Department of Pharmacology & Neuroscience, Fort Worth, Texas, United States
| | - Brett H Mueller
- University of North Texas Health Science Center, Department of Pharmacology & Neuroscience, Fort Worth, Texas, United States
| | - Nitasha R Phatak
- University of North Texas Health Science Center, Department of Cell Biology and Immunology, North Texas Eye Research Institute, Fort Worth, Texas, United States
| | - Shaoqing He
- University of North Texas Health Science Center, Department of Cell Biology and Immunology, North Texas Eye Research Institute, Fort Worth, Texas, United States
| | - Hai-Ying Ma
- University of North Texas Health Science Center, Department of Pharmacology & Neuroscience, Fort Worth, Texas, United States
| | - Michael J Forster
- University of North Texas Health Science Center, Department of Pharmacology & Neuroscience, Fort Worth, Texas, United States
| | - Thomas Yorio
- University of North Texas Health Science Center, Department of Pharmacology & Neuroscience, Fort Worth, Texas, United States
| | - Raghu R Krishnamoorthy
- University of North Texas Health Science Center, Department of Cell Biology and Immunology, North Texas Eye Research Institute, Fort Worth, Texas, United States
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Wang H, Pan S, Yang X, Zhu B, Wang D. Oxidative phosphorylated neurofilament protein M protects spinal cord against ischemia/reperfusion injury. Neural Regen Res 2014; 9:1672-7. [PMID: 25374588 PMCID: PMC4211187 DOI: 10.4103/1673-5374.141803] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/25/2014] [Indexed: 12/28/2022] Open
Abstract
Previous studies have shown that neurofilament protein M expression is upregulated in the early stage of spinal cord ischemia/reperfusion injury, indicating that this protein may play a role in the injury process. In the present study, we compared protein expression in spinal cord tissue of rabbits after 25 minutes of ischemia followed by 0, 12, 24, or 48 hours of reperfusion with that of sham operated rabbits, using proteomic two-dimensional gel electrophoresis and mass spectrometry. In addition, the nerve repair-related neurofilament protein M with the unregulated expression was detected with immunohistochemistry and western blot analysis. Two-dimensional gel electrophoresis and mass spectrometry showed that, compared with the sham group, upregulation of protein expression was most significant in the spinal cords of rabbits that had undergone ischemia and 24 hours of reperfusion. Immunohistochemical analysis revealed that neurofilament protein M was located in the membrane and cytoplasm of neuronal soma and axons at each time point after injury. Western blot analysis showed that neurofilament protein M expression increased with reperfusion time until it peaked at 24 hours and returned to baseline level after 48 hours. Furthermore, neurofilament protein M is phosphorylated under oxidative stress, and expression changes were parallel for the phosphorylated and non-phosphorylated forms. Neurofilament protein M plays an important role in spinal cord ischemia/reperfusion injury, and its functions are achieved through oxidative phosphorylation.
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Affiliation(s)
- Haitao Wang
- Department of Orthopedic Surgery, Affiliated Hospital of Beihua University, Jilin, Jilin Province, China
| | - Su Pan
- Department of Orthopedics, the Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Xiaoyu Yang
- Department of Orthopedics, the Second Hospital of Jilin University, Changchun, Jilin Province, China
| | - Benqing Zhu
- Department of Orthopedics, People's Hospital of Tianjin, Tianjin, China
| | - Dalin Wang
- Department of Orthopedic Surgery, Affiliated Hospital of Beihua University, Jilin, Jilin Province, China
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