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Richner M, Gonçalves NP, Jensen PH, Nyengaard JR, Vægter CB, Jan A. Recombinant adeno-associated virus mediated gene delivery in the extracranial nervous system of adult mice by direct nerve immersion. STAR Protoc 2022; 3:101181. [PMID: 35243373 PMCID: PMC8861814 DOI: 10.1016/j.xpro.2022.101181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
This protocol outlines a minimally invasive and quickly performed approach for transgene delivery in the extracranial nervous system of adult mice using recombinant adeno-associated virus (AAV). The technique, named Sciatic Nerve Direct Immersion (SciNDi), relies on the direct bilateral immersion of the exposed sciatic nerve with AAV. We show that in comparison with intramuscular AAV delivery, SciNDi results in widespread transduction in connected neuroanatomical tracts both in the sciatic nerve trunk and the lumbar spinal cord. For complete details on the use and execution of this protocol, please refer to Jan et al. (2019) and Richner et al. (2011, 2017). A facile approach for AAV delivery in the peripheral nervous system of adult mice Transduction of sciatic nerve and modestly in spinal cord ventral horn neurons Avoids tissue trauma associated with direct intraparenchymal injection of AAV
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Affiliation(s)
- Mette Richner
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic-EMBL Partnership for Molecular Medicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
- Corresponding author
| | - Nádia Pereira Gonçalves
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic-EMBL Partnership for Molecular Medicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
| | - Poul Henning Jensen
- DANDRITE, Department of Biomedicine, Aarhus University, Ole Worms Allé 3, 8000 Aarhus C, Denmark
| | - Jens Randel Nyengaard
- Core Center for Molecular Morphology, Section for Stereology and Microscopy Department of Clinical Medicine, Aarhus University, Department of Pathology, Aarhus University Hospital, 8200 Aarhus N, Denmark
| | - Christian Bjerggaard Vægter
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic-EMBL Partnership for Molecular Medicine, Aarhus University, Høegh-Guldbergs Gade 10, 8000 Aarhus C, Denmark
| | - Asad Jan
- DANDRITE, Department of Biomedicine, Aarhus University, Ole Worms Allé 3, 8000 Aarhus C, Denmark
- Corresponding author
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Jan A, Gonçalves NP, Vaegter CB, Jensen PH, Ferreira N. The Prion-Like Spreading of Alpha-Synuclein in Parkinson's Disease: Update on Models and Hypotheses. Int J Mol Sci 2021; 22:8338. [PMID: 34361100 PMCID: PMC8347623 DOI: 10.3390/ijms22158338] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 07/29/2021] [Accepted: 07/30/2021] [Indexed: 12/11/2022] Open
Abstract
The pathological aggregation of the presynaptic protein α-synuclein (α-syn) and propagation through synaptically coupled neuroanatomical tracts is increasingly thought to underlie the pathophysiological progression of Parkinson's disease (PD) and related synucleinopathies. Although the precise molecular mechanisms responsible for the spreading of pathological α-syn accumulation in the CNS are not fully understood, growing evidence suggests that de novo α-syn misfolding and/or neuronal internalization of aggregated α-syn facilitates conformational templating of endogenous α-syn monomers in a mechanism reminiscent of prions. A refined understanding of the biochemical and cellular factors mediating the pathological neuron-to-neuron propagation of misfolded α-syn will potentially elucidate the etiology of PD and unravel novel targets for therapeutic intervention. Here, we discuss recent developments on the hypothesis regarding trans-synaptic propagation of α-syn pathology in the context of neuronal vulnerability and highlight the potential utility of novel experimental models of synucleinopathies.
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Affiliation(s)
- Asad Jan
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic EMBL Partnership for Molecular Medicine, Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark; (N.P.G.); (C.B.V.); (P.H.J.)
| | - Nádia Pereira Gonçalves
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic EMBL Partnership for Molecular Medicine, Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark; (N.P.G.); (C.B.V.); (P.H.J.)
- International Diabetic Neuropathy Consortium (IDNC), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Christian Bjerggaard Vaegter
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic EMBL Partnership for Molecular Medicine, Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark; (N.P.G.); (C.B.V.); (P.H.J.)
- International Diabetic Neuropathy Consortium (IDNC), Aarhus University Hospital, 8200 Aarhus, Denmark
| | - Poul Henning Jensen
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic EMBL Partnership for Molecular Medicine, Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark; (N.P.G.); (C.B.V.); (P.H.J.)
| | - Nelson Ferreira
- Danish Research Institute of Translational Neuroscience (DANDRITE), Nordic EMBL Partnership for Molecular Medicine, Department of Biomedicine, Aarhus University, 8000 Aarhus, Denmark; (N.P.G.); (C.B.V.); (P.H.J.)
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Ferreira N, Gonçalves NP, Jan A, Jensen NM, van der Laan A, Mohseni S, Vægter CB, Jensen PH. Trans-synaptic spreading of alpha-synuclein pathology through sensory afferents leads to sensory nerve degeneration and neuropathic pain. Acta Neuropathol Commun 2021; 9:31. [PMID: 33632316 PMCID: PMC7905893 DOI: 10.1186/s40478-021-01131-8] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Accepted: 02/11/2021] [Indexed: 01/13/2023] Open
Abstract
Pain is a common non-motor symptom of Parkinson’s disease (PD), with current limited knowledge of its pathophysiology. Here, we show that peripheral inoculation of mouse alpha-synuclein (α-Syn) pre-formed fibrils, in a transgenic mouse model of PD, elicited retrograde trans-synaptic spreading of α-Syn pathology (pSer129) across sensory neurons and dorsal nerve roots, reaching central pain processing regions, including the spinal dorsal horn and the projections of the anterolateral system in the central nervous system (CNS). Pathological peripheral to CNS propagation of α-Syn aggregates along interconnected neuronal populations within sensory afferents, was concomitant with impaired nociceptive response, reflected by mechanical allodynia, reduced nerve conduction velocities (sensory and motor) and degeneration of small- and medium-sized myelinated fibers. Our findings show a link between the transneuronal propagation of α-Syn pathology with sensory neuron dysfunction and neuropathic impairment, suggesting promising avenues of investigation into the mechanisms underlying pain in PD.
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Martins D, Moreira J, Gonçalves NP, Saraiva MJ. MMP-14 overexpression correlates with the neurodegenerative process in familial amyloidotic polyneuropathy. Dis Model Mech 2018; 10:1253-1260. [PMID: 28993312 PMCID: PMC5665453 DOI: 10.1242/dmm.028571] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 08/11/2017] [Indexed: 01/20/2023] Open
Abstract
Levels of matrix metalloproteases (MMPs) can be differentially regulated in response to injury or neurological diseases. For instance, it is known that selective and short-term inhibition of MMP-14, a membrane-type 1 MMP, accelerates axon regeneration. Because axon growth and regeneration is impaired in familial amyloidotic polyneuropathy (FAP), a neurodegenerative disorder characterized by misfolding and deposition of mutant transthyretin (TTR) in the peripheral nervous system (PNS), we presently investigated the expression levels and the potential role for MMP-14 in this condition. By using cell culture studies, a mouse model of disease and human clinical samples, we observed that MMP-14: (i) is overexpressed in FAP nerves, correlating with TTR deposition; (ii) is upregulated in sciatic nerves from a preclinical transgenic mouse model, increasing with TTR deposition; (iii) levels in the PNS and plasma are rescued upon treatment of mice with anakinra or TTR siRNA, drugs acting over the IL-1 signaling pathway or TTR liver synthesis, respectively; (iv) increases in Schwann cells upon incubation with amyloid-like aggregates; and, finally, (v) is increased in plasma of FAP patients, correlating with disease progression. These results highlight the relevance of MMP-14 in the pathophysiology of FAP, suggesting not only a potential role for this molecule as a novel biomarker for therapy follow up, but also as a new potential therapeutic target. Summary: MMP-14 overexpression correlates with familial amyloidotic polyneuropathy disease and progression, as determined using mouse models and human samples. TTR gene silencing in the preclinical model decreases MMP-14 plasma levels.
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Affiliation(s)
- Diana Martins
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, R. Alfredo Allen 208, 4200-135 Porto, Portugal
| | - João Moreira
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, R. Alfredo Allen 208, 4200-135 Porto, Portugal.,Neurobiologia Molecular - Instituto de Biologia Molecular (IBMC), Universidade do Porto, R. Alfredo Allen 208, 4200-135 Porto, Portugal
| | - Nádia Pereira Gonçalves
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, R. Alfredo Allen 208, 4200-135 Porto, Portugal.,Neurobiologia Molecular - Instituto de Biologia Molecular (IBMC), Universidade do Porto, R. Alfredo Allen 208, 4200-135 Porto, Portugal
| | - Maria João Saraiva
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, R. Alfredo Allen 208, 4200-135 Porto, Portugal .,Neurobiologia Molecular - Instituto de Biologia Molecular (IBMC), Universidade do Porto, R. Alfredo Allen 208, 4200-135 Porto, Portugal
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Abstract
The global prevalence of diabetes is rapidly increasing, affecting more than half a billion individuals within the next few years. As diabetes negatively affects several physiological systems, this dramatic increase represents not only impaired quality of life on the individual level but also a huge socioeconomic challenge. One of the physiological consequences affecting up to half of diabetic patients is the progressive deterioration of the peripheral nervous system, resulting in spontaneous pain and eventually loss of sensory function, motor weakness, and organ dysfunctions. Despite intense research on the consequences of hyperglycemia on nerve functions, the biological mechanisms underlying diabetic neuropathy are still largely unknown, and treatment options lacking. Research has mainly focused directly on the neuronal component, presumably from the perspective that this is the functional signal-transmitting unit of the nerve. However, it is noteworthy that each single peripheral sensory neuron is intimately associated with numerous glial cells; the neuronal soma is completely enclosed by satellite glial cells and the length of the longest axons covered by at least 1,000 Schwann cells. The glial cells are vital for the neuron, but very little is still known about these cells in general and especially how they respond to diabetes in terms of altered neuronal support. We will discuss current knowledge of peripheral glial cells and argue that increased research in these cells is imperative for a better understanding of the mechanisms underlying diabetic neuropathy.
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Affiliation(s)
- Nádia Pereira Gonçalves
- Department of Biomedicine, Nordic-EMBL Partnership for Molecular Medicine, Danish Research Institute of Translational Neuroscience (DANDRITE), Aarhus University, Aarhus, Denmark.,The International Diabetic Neuropathy Consortium (IDNC), Aarhus University, Aarhus, Denmark
| | - Christian Bjerggaard Vægter
- Department of Biomedicine, Nordic-EMBL Partnership for Molecular Medicine, Danish Research Institute of Translational Neuroscience (DANDRITE), Aarhus University, Aarhus, Denmark.,The International Diabetic Neuropathy Consortium (IDNC), Aarhus University, Aarhus, Denmark
| | - Lone Tjener Pallesen
- Department of Biomedicine, Nordic-EMBL Partnership for Molecular Medicine, Danish Research Institute of Translational Neuroscience (DANDRITE), Aarhus University, Aarhus, Denmark
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Gonçalves NP, Moreira J, Martins D, Vieira P, Obici L, Merlini G, Saraiva M, Saraiva MJ. Differential expression of Cathepsin E in transthyretin amyloidosis: from neuropathology to the immune system. J Neuroinflammation 2017; 14:115. [PMID: 28583160 PMCID: PMC5460450 DOI: 10.1186/s12974-017-0891-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Accepted: 05/26/2017] [Indexed: 11/25/2022] Open
Abstract
Background Increasing evidence supports a key role for inflammation in the neurodegenerative process of familial amyloidotic polyneuropathy (FAP). While there seems to be an overactivation of the neuronal interleukin-1 signaling pathway, the immune response is apparently compromised in FAP. Accordingly, little immune cell infiltration is observed around pre-fibrillar or fibrillar amyloid deposits, with the underlying mechanism for this phenomenon remaining poorly understood. Cathepsin E (CtsE) is an important intermediate for antigen presentation and chemotaxis, but its role in the pathogenesis of FAP disease remains unknown. Methods In this study, we used both mouse primary macrophages and in vivo studies based on transgenic models of FAP and human samples to characterize CtsE expression in different physiological systems. Results We show that CtsE is critically decreased in bone marrow-derived macrophages from a FAP mouse model, possibly contributing for cell function impairment. Compromised levels of CtsE were also found in injured nerves of transgenic mice and, most importantly, in naïve peripheral nerves, sensory ganglia, murine stomach, and sural nerve biopsies derived from FAP patients. Expression of CtsE in tissues was associated with transthyretin (TTR) deposition and differentially regulated accordingly with the physiological system under study. Preventing deposition with a TTR small interfering RNA rescued CtsE in the peripheral nervous system (PNS). In contrast, the expression of CtsE increased in splenic cells (mainly monocytes) or peritoneal macrophages, indicating a differential macrophage phenotype. Conclusion Altogether, our data highlights the potential of CtsE as a novel FAP biomarker and a possible modulator for innate immune cell chemotaxis to the disease most affected tissues—the peripheral nerve and the gastrointestinal tract. Electronic supplementary material The online version of this article (doi:10.1186/s12974-017-0891-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Nádia Pereira Gonçalves
- i3S - Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal.,Molecular Neurobiology Group, IBMC - Institute for Molecular and Cell Biology, University of Porto, 4150-180, Porto, Portugal.,Present address: Department of Biomedicine/DANDRITE, Aarhus University, Ole Worms Alle 3, 1171, 8000, Aarhus C, Denmark
| | - João Moreira
- i3S - Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal.,Molecular Neurobiology Group, IBMC - Institute for Molecular and Cell Biology, University of Porto, 4150-180, Porto, Portugal
| | - Diana Martins
- i3S - Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal.,Molecular Neurobiology Group, IBMC - Institute for Molecular and Cell Biology, University of Porto, 4150-180, Porto, Portugal
| | - Paulo Vieira
- Unité du Développement des Lymphocytes, Département d'Immunologie, Institut Pasteur, Paris, 75724 CEDEX 15, France
| | - Laura Obici
- Amyloidosis Research and Treatment Center, Department of Molecular Medicine, Fondazione Instituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Policlinico San Matteo, University of Pavia, Pavia, Italy
| | - Giampaolo Merlini
- Amyloidosis Research and Treatment Center, Department of Molecular Medicine, Fondazione Instituto di Ricovero e Cura a Carattere Scientifico (IRCCS) Policlinico San Matteo, University of Pavia, Pavia, Italy
| | - Margarida Saraiva
- i3S - Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal.,Immune Regulation Group, IBMC - Institute for Molecular and Cell Biology, University of Porto, 4150-180, Porto, Portugal
| | - Maria João Saraiva
- i3S - Instituto de Investigação e Inovação em Saúde da Universidade do Porto, Rua Alfredo Allen, 208, 4200-135, Porto, Portugal. .,Molecular Neurobiology Group, IBMC - Institute for Molecular and Cell Biology, University of Porto, 4150-180, Porto, Portugal.
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Gonçalves NP, Martins D, Saraiva MJ. The importance of pre-clinical studies in animal models of TTR amyloidosis for the discovery of novel patient disease biomarkers. Amyloid 2017; 24:83-84. [PMID: 28434291 DOI: 10.1080/13506129.2016.1278362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- N P Gonçalves
- a Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto , Portugal and.,b IBMC Unidade de Neurobiologia Molecular, Universidade do Porto , Portugal
| | - D Martins
- a Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto , Portugal and.,b IBMC Unidade de Neurobiologia Molecular, Universidade do Porto , Portugal
| | - M J Saraiva
- a Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto , Portugal and.,b IBMC Unidade de Neurobiologia Molecular, Universidade do Porto , Portugal
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Gonçalves NP, Gonçalves P, Magalhães J, Ventosa M, Coelho AV, Saraiva MJ. Tissue remodeling after interference RNA mediated knockdown of transthyretin in a familial amyloidotic polyneuropathy mouse model. Neurobiol Aging 2016; 47:91-101. [PMID: 27568093 DOI: 10.1016/j.neurobiolaging.2016.07.020] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 07/22/2016] [Accepted: 07/24/2016] [Indexed: 12/11/2022]
Abstract
Transthyretin (TTR) deposition in the peripheral nervous system is the hallmark of familial amyloidotic polyneuropathy (FAP). Currently, liver transplantation is the only available treatment to halt the progression of clinical symptoms; however, due to the limitations of this procedure, development of alternative therapeutic strategies is of utmost importance. In this regard, interference RNA (RNAi) targeting TTR is currently in phase III clinical development. To dissect molecular changes occurring in dorsal root ganglia (DRG) upon RNAi-mediated knockdown of TTR, we treated both chronically and acutely an FAP mouse model, in different stages of disease. Our data show that inhibition of TTR expression by the liver with RNAi reverse TTR deposition in DRG, decrease matrix metalloproteinase-2 (MMP-2) protein levels in plasma, inhibit Mmp-2 gene expression and downregulate MMP-9 activity in DRG, indicating extracellular matrix remodeling. Furthermore, protein levels of MMP-2 were found upregulated in plasma samples from FAP patients indicating that MMP-2 might be a novel potential biomarker for FAP diagnosis. Collectively, our data show that silencing TTR liver synthesis in vivo can modulate TTR-induced pathology in the peripheral nervous system and highlight the potential of MMP-2 as a novel disease biomarker.
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Affiliation(s)
- Nádia Pereira Gonçalves
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, Porto, Portugal; Molecular Neurobiology, Instituto de Biologia Molecular e Celular - IBMC, Porto, Portugal
| | - Paula Gonçalves
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, Porto, Portugal; Molecular Neurobiology, Instituto de Biologia Molecular e Celular - IBMC, Porto, Portugal
| | - Joana Magalhães
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, Porto, Portugal; Molecular Neurobiology, Instituto de Biologia Molecular e Celular - IBMC, Porto, Portugal
| | - Miguel Ventosa
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Ana Varela Coelho
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa, Oeiras, Portugal
| | - Maria João Saraiva
- Instituto de Inovação e Investigação em Saúde (I3S), Universidade do Porto, Porto, Portugal; Molecular Neurobiology, Instituto de Biologia Molecular e Celular - IBMC, Porto, Portugal.
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Gonçalves NP, Gonçalves P, Ventosa M, Coelho AV, Saraiva MJ. Tissue remodeling after RNAi-mediated knockdown of TTR in a Familial Amyloidotic Polyneuropathy mouse model. Orphanet J Rare Dis 2015. [PMCID: PMC4642112 DOI: 10.1186/1750-1172-10-s1-p5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Gonçalves NP, Costelha S, Saraiva MJ. Glial cells in familial amyloidotic polyneuropathy. Acta Neuropathol Commun 2014; 2:177. [PMID: 25519307 PMCID: PMC4280682 DOI: 10.1186/s40478-014-0177-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 12/08/2014] [Indexed: 11/10/2022] Open
Abstract
INTRODUCTION Transthyretin V30M mutation is the most common variant leading to Familial Amyloidotic Polyneuropathy. In this genetic disorder, Transthyretin accumulates preferentially in the extracellular matrix of peripheral and autonomic nervous systems leading to cell death and dysfunction. Thus, knowledge regarding important biological systems for Transthyretin clearance might unravel novel insights into Familial Amyloidotic Polyneuropathy pathophysiology. Herein, our aim was to evaluate the ability of glial cells from peripheral and autonomic nervous systems in Transthyretin uptake and degradation. We assessed the role of glial cells in Familial Amyloidotic Polyneuropathy pathogenesis with real-time polymerase chain reaction, immunohistochemistry, interference RNA and confocal microscopy. RESULTS Histological examination revealed that Schwann cells and satellite cells, from an Familial Amyloidotic Polyneuropathy mouse model, internalize and degrade non-fibrillar Transthyretin. Immunohistochemical studies of human nerve biopsies from V30M patients and disease controls showed intracellular Transthyretin immunoreactivity in Schwann cells, corroborating animal data. Additionally, we found Transthyretin expression in colon of this Familial Amyloidotic Polyneuropathy mouse model, probably being synthesized by satellite cells of the myenteric plexus. CONCLUSIONS Glial cells from the peripheral and autonomic nervous systems are able to internalize Transthyretin. Overall, these findings bring to light the closest relationship between Transthyretin burden and clearance from the nervous system extracellular milieu.
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Abstract
INTRODUCTION Inflammation is a key pathological hallmark of several neurodegenerative disorders including Alzheimer's disease, Parkinson's disease and familial amyloidotic polyneuropathy (FAP). Among all inflammatory cytokines associated with FAP, IL-1β, in particular, has been implicated in playing a key pathogenic role. In the present study, we sought to investigate whether blocking IL-1β signaling provides disease-modifying benefits in an FAP mouse model. METHODS We assessed the effect of chronic administration of Anakinra, an IL-1 antagonist, on FAP pathogenesis in vivo, using real-time polymerase chain reaction (qPCR), semi-quantitative immunohistochemistry (SQ-IHC), western blot and nerve morphometric analyses. RESULTS We found that treatment with Anakinra prevents transthyretin (TTR) extracellular deposition in sciatic nerve, protecting unmyelinated nerve fibers from aggregate-induced degeneration. Moreover, Anakinra administration significantly suppressed IL-1 signaling pathway and inhibited apoptosis and nitrative stress. CONCLUSIONS The present work highlights the relevance of the IL-1 signaling pathway in the pathophysiology of FAP. Our results bring to light the importance of non-amyloid targets in the therapeutic strategies for this disorder. Thus, we propose the use of Anakinra as a potential therapeutic agent for TTR-related amyloidosis.
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MESH Headings
- Amyloid Neuropathies, Familial/drug therapy
- Amyloid Neuropathies, Familial/immunology
- Amyloid Neuropathies, Familial/pathology
- Animals
- Apoptosis
- Disease Models, Animal
- Ganglia, Spinal/drug effects
- Ganglia, Spinal/immunology
- Ganglia, Spinal/pathology
- Gene Expression
- Injections, Subcutaneous
- Interleukin 1 Receptor Antagonist Protein/pharmacology
- Interleukin-1beta/antagonists & inhibitors
- Interleukin-1beta/immunology
- Mice
- Mice, Transgenic
- Nerve Fibers, Unmyelinated/drug effects
- Nerve Fibers, Unmyelinated/immunology
- Nerve Fibers, Unmyelinated/pathology
- Oxidative Stress
- Prealbumin/chemistry
- Prealbumin/genetics
- Protein Aggregates
- Protein Aggregation, Pathological/drug therapy
- Protein Aggregation, Pathological/immunology
- Protein Aggregation, Pathological/pathology
- Sciatic Nerve/drug effects
- Sciatic Nerve/immunology
- Sciatic Nerve/pathology
- Signal Transduction/drug effects
- Signal Transduction/immunology
- Transgenes
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Affiliation(s)
- Nádia Pereira Gonçalves
- Department of Molecular Neurobiology, Institute for Molecular and Cell Biology, Rua do Campo AlegrePortoPortugal
- Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do PortoPortoPortugal
| | - Paulo Vieira
- Unité du Développement des Lymphocytes, Département d’Immunologie, Institut PasteurParis, CEDEXFrance
| | - Maria João Saraiva
- Department of Molecular Neurobiology, Institute for Molecular and Cell Biology, Rua do Campo AlegrePortoPortugal
- Instituto de Ciências Biomédicas de Abel Salazar (ICBAS), Universidade do PortoPortoPortugal
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Gonçalves NP, Teixeira-Coelho M, Saraiva MJ. The inflammatory response to sciatic nerve injury in a familial amyloidotic polyneuropathy mouse model. Exp Neurol 2014; 257:76-87. [DOI: 10.1016/j.expneurol.2014.04.030] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2014] [Revised: 04/03/2014] [Accepted: 04/28/2014] [Indexed: 11/29/2022]
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Gonçalves NP, Oliveira H, Pêgo AP, Saraiva MJ. A novel nanoparticle delivery system for in vivo targeting of the sciatic nerve: impact on regeneration. Nanomedicine (Lond) 2012; 7:1167-80. [DOI: 10.2217/nnm.11.188] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Aim: Innovative solutions in the development of drug delivery systems targeting the nerve tissue are awaited. In this regard, a novel system for the delivery of drugs to the sciatic nerve was created using nanomedical principles. Materials & methods: Chitosan was the vehicle material used in the experiment. Heparin bound to growth factors has been administered to enhance peripheral nerve regeneration, and since heparin possesses the appropriate charge to be able to form nanoparticles with chitosan, it appears to be a good candidate to base this new delivery system on. Results: Maximal absorption took place throughout the extracellular matrix at day 15. No major inflammatory response was observed, indicating that this is a safe and biocompatible system for drug delivery to nerves. Sensorimotor performance and nerve regeneration of mice receiving these nanoparticles were superior as compared with controls. Conclusion: Our work demonstrates a versatile nanoparticle delivery system that successfully targets drugs ‘in vivo’ to the sciatic nerve, opening novel avenues in the field of nanomedicine to the design of therapeutic strategies that enhance axonal regeneration. Original submitted 22 July 2011; Revised submitted 8 December 2011; Published online 4 April 2012
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Affiliation(s)
- Nádia Pereira Gonçalves
- Unidade de Neurobiologia Molecular, IBMC-Instituto de Biologia Molecular e Celular – 4150-180 Porto, Portugal
- Instituto de Ciências Biomédicas de Abel Salazar, ICBAS-Universidade do Porto – 4099-003 Porto, Portugal
| | - Hugo Oliveira
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre, 823, 4150-180 Porto, Portugal
- Universidade do Porto, Faculdade de Engenharia, Rua Roberto Frias, s/n, 4200-465 Porto, Portugal
| | - Ana Paula Pêgo
- INEB – Instituto de Engenharia Biomédica, Universidade do Porto, Rua do Campo Alegre, 823, 4150-180 Porto, Portugal
| | - Maria João Saraiva
- Unidade de Neurobiologia Molecular, IBMC-Instituto de Biologia Molecular e Celular – 4150-180 Porto, Portugal
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Gonçalves NP, Uemura H. [The water bed and the alpist bed in the prevention of decubitus ulcers]. Rev Bras Enferm 1984; 37:290-2. [PMID: 6571143 DOI: 10.1590/s0034-71671984000400019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
As autoras discorrem sobre características, técnica utilizada, vantagens e desvantagens no uso do colchão d'agua e do colchão de alpiste na prevenção de escaras de decúbito. Concluem que o colchão de alpiste deve ser escolhido por proporcionar conforto, facilidade de confecção e manuseio além de ser menos dispendioso ao paciente.
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