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Arcos J, Grunenwald F, Sepulveda D, Jerez C, Urbina V, Huerta T, Troncoso-Escudero P, Tirado D, Perez A, Diaz-Espinoza R, Nova E, Kubitscheck U, Rodriguez-Gatica JE, Hetz C, Toledo J, Ahumada P, Rojas-Rivera D, Martín-Montañez E, Garcia-Fernandez M, Vidal RL. IGF2 prevents dopaminergic neuronal loss and decreases intracellular alpha-synuclein accumulation in Parkinson's disease models. Cell Death Discov 2023; 9:438. [PMID: 38042807 PMCID: PMC10693583 DOI: 10.1038/s41420-023-01734-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Revised: 11/05/2023] [Accepted: 11/21/2023] [Indexed: 12/04/2023] Open
Abstract
Parkinson's disease (PD) is the second most common late-onset neurodegenerative disease and the predominant cause of movement problems. PD is characterized by motor control impairment by extensive loss of dopaminergic neurons in the substantia nigra pars compacta (SNpc). This selective dopaminergic neuronal loss is in part triggered by intracellular protein inclusions called Lewy bodies, which are composed mainly of misfolded alpha-synuclein (α-syn) protein. We previously reported insulin-like growth factor 2 (IGF2) as a key protein downregulated in PD patients. Here we demonstrated that IGF2 treatment or IGF2 overexpression reduced the α-syn aggregates and their toxicity by IGF2 receptor (IGF2R) activation in cellular PD models. Also, we observed IGF2 and its interaction with IGF2R enhance the α-syn secretion. To determine the possible IGF2 neuroprotective effect in vivo we used a gene therapy approach in an idiopathic PD model based on α-syn preformed fibrils intracerebral injection. IGF2 gene therapy revealed a significantly preventing of motor impairment in idiopathic PD model. Moreover, IGF2 expression prevents dopaminergic neuronal loss in the SN together with a decrease in α-syn accumulation (phospho-α-syn levels) in the striatum and SN brain region. Furthermore, the IGF2 neuroprotective effect was associated with the prevention of synaptic spines loss in dopaminergic neurons in vivo. The possible mechanism of IGF2 in cell survival effect could be associated with the decrease of the intracellular accumulation of α-syn and the improvement of dopaminergic synaptic function. Our results identify to IGF2 as a relevant factor for the prevention of α-syn toxicity in both in vitro and preclinical PD models.
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Affiliation(s)
- Javiera Arcos
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Felipe Grunenwald
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Denisse Sepulveda
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Carolina Jerez
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Valentina Urbina
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Tomas Huerta
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Paulina Troncoso-Escudero
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
- Molecular Diagnostic and Biomarkers Laboratory, Department of Pathology, Faculty of Medicine Clínica Alemana, Universidad del Desarrollo, Santiago, Chile
| | - Daniel Tirado
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
- Escuela de Tecnología Médica, Universidad Mayor, Santiago, Chile
| | - Angela Perez
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
- Escuela de Tecnología Médica, Universidad Mayor, Santiago, Chile
| | - Rodrigo Diaz-Espinoza
- Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
| | - Esteban Nova
- Departamento de Química, Facultad de Ciencias Naturales, Matemáticas y Medio Ambiente, Universidad Tecnológica Metropolitana, Santiago, Chile
| | - Ulrich Kubitscheck
- Clausius Institute of Physical and Theoretical Chemistry, University of Bonn, Bonn, Germany
| | | | - Claudio Hetz
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Jorge Toledo
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
| | - Pablo Ahumada
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile
| | - Diego Rojas-Rivera
- Escuela de Tecnología Médica, Universidad Mayor, Santiago, Chile
- Escuela de Biotecnología, Universidad Mayor, Santiago, Chile
- Center for Biomedicine, Universidad Mayor, Santiago, Chile
| | - Elisa Martín-Montañez
- Department of Pharmacology, Faculty of Medicine, Biomedical Research Institute of Malaga, University of Malaga, Malaga, Spain
| | - María Garcia-Fernandez
- Department of Human Physiology, Faculty of Medicine, Biomedical Research Institute of Malaga, University of Malaga, Malaga, Spain
| | - René L Vidal
- Center for Integrative Biology, Universidad Mayor, Santiago, Chile.
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile.
- Center for Geroscience, Brain Health and Metabolism, Santiago, Chile.
- Escuela de Tecnología Médica, Universidad Mayor, Santiago, Chile.
- Escuela de Biotecnología, Universidad Mayor, Santiago, Chile.
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Vega-Galvez A, Gomez-Perez LS, Zepeda F, Vidal RL, Grunenwald F, Mejías N, Pasten A, Araya M, Ah-Hen KS. Assessment of Bio-Compounds Content, Antioxidant Activity, and Neuroprotective Effect of Red Cabbage ( Brassica oleracea var. Capitata rubra) Processed by Convective Drying at Different Temperatures. Antioxidants (Basel) 2023; 12:1789. [PMID: 37760092 PMCID: PMC10526076 DOI: 10.3390/antiox12091789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/15/2023] [Accepted: 09/18/2023] [Indexed: 09/29/2023] Open
Abstract
Parkinson's disease (PD) is the second most common neurodegenerative disorder, and no efficient therapy able to cure or slow down PD is available. In this study, dehydrated red cabbage was evaluated as a novel source of bio-compounds with neuroprotective capacity. Convective drying was carried out at different temperatures. Total phenolics (TPC), flavonoids (TFC), anthocyanins (TAC), and glucosinolates (TGC) were determined using spectrophotometry, amino acid profile by LC-DAD and fatty acid profile by GC-FID. Phenolic characterization was determined by liquid chromatography-high-resolution mass spectrometry. Cytotoxicity and neuroprotection assays were evaluated in SH-SY5Y human cells, observing the effect on preformed fibrils of α-synuclein. Drying kinetic confirmed a shorter processing time with temperature increase. A high concentration of bio-compounds was observed, especially at 90 °C, with TPC = 1544.04 ± 11.4 mg GAE/100 g, TFC = 690.87 ± 4.0 mg QE/100 g and TGC = 5244.9 ± 260.2 µmol SngE/100 g. TAC degraded with temperature. Glutamic acid and arginine were predominant. Fatty acid profiles were relatively stable and were found to be mostly C18:3n3. The neochlorogenic acid was predominant. The extracts had no cytotoxicity and showed a neuroprotective effect at 24 h testing, which can extend in some cases to 48 h. The present findings underpin the use of red cabbage as a functional food ingredient.
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Affiliation(s)
- Antonio Vega-Galvez
- Departamento de Ingeniería en Alimentos, Universidad de La Serena, Avda. Raúl Bitrán 1305, La Serena 1700000, Chile
| | - Luis S. Gomez-Perez
- Departamento de Ingeniería en Alimentos, Universidad de La Serena, Avda. Raúl Bitrán 1305, La Serena 1700000, Chile
| | - Francisca Zepeda
- Departamento de Ingeniería en Alimentos, Universidad de La Serena, Avda. Raúl Bitrán 1305, La Serena 1700000, Chile
| | - René L. Vidal
- Facultad de Medicina, Instituto de Neurociencia Biomédica (BNI), Universidad de Chile, Santiago 8380000, Chile
- Centro FONDAP de Gerociencia, Salud Mental y Metabolismo (GERO), Santiago 8380000, Chile
- Centro de Biología Integrativa, Facultad de Ciencias, Universidad Mayor, Santiago 8380000, Chile
| | - Felipe Grunenwald
- Centro de Biología Integrativa, Facultad de Ciencias, Universidad Mayor, Santiago 8380000, Chile
| | - Nicol Mejías
- Departamento de Ingeniería en Alimentos, Universidad de La Serena, Avda. Raúl Bitrán 1305, La Serena 1700000, Chile
| | - Alexis Pasten
- Departamento de Ingeniería en Alimentos, Universidad de La Serena, Avda. Raúl Bitrán 1305, La Serena 1700000, Chile
| | - Michael Araya
- Centro de Investigación y Desarrollo Tecnológico en Algas (CIDTA), Facultad de Ciencias del Mar, Universidad Católica del Norte, Larrondo 1281, Coquimbo 1780000, Chile
| | - Kong Shun Ah-Hen
- Facultad de Ciencias Agrarias y Alimentarias, Instituto de Ciencia y Tecnología de los Alimentos, Universidad Austral de Chile, Valdivia 5090000, Chile
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Arancibia-Opazo S, Contreras-Riquelme JS, Sánchez M, Cisternas-Olmedo M, Vidal RL, Martin AJM, Sáez MA. Transcriptional and Histone Acetylation Changes Associated with CRE Elements Expose Key Factors Governing the Regulatory Circuit in the Early Stage of Huntington's Disease Models. Int J Mol Sci 2023; 24:10848. [PMID: 37446028 DOI: 10.3390/ijms241310848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 05/25/2023] [Revised: 06/21/2023] [Accepted: 06/23/2023] [Indexed: 07/15/2023] Open
Abstract
Huntington's disease (HD) is a disorder caused by an abnormal expansion of trinucleotide CAG repeats within the huntingtin (Htt) gene. Under normal conditions, the CREB Binding Protein interacts with CREB elements and acetylates Lysine 27 of Histone 3 to direct the expression of several genes. However, mutant Htt causes depletion of CBP, which in turn induces altered histone acetylation patterns and transcriptional deregulation. Here, we have studied a differential expression analysis and H3K27ac variation in 4- and 6-week-old R6/2 mice as a model of juvenile HD. The analysis of differential gene expression and acetylation levels were integrated into Gene Regulatory Networks revealing key regulators involved in the altered transcription cascade. Our results show changes in acetylation and gene expression levels that are related to impaired neuronal development, and key regulators clearly defined in 6-week-old mice are proposed to drive the downstream regulatory cascade in HD. Here, we describe the first approach to determine the relationship among epigenetic changes in the early stages of HD. We determined the existence of changes in pre-symptomatic stages of HD as a starting point for early onset indicators of the progression of this disease.
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Affiliation(s)
- Sandra Arancibia-Opazo
- Chromatin, Epigenetic, and Neuroscience Laboratory, Centro de Genómica y Bioinformática, Facultad de Ciencias, Ingeniería y Tecnología, Universidad Mayor, Santiago 8580745, Chile
- Programa de Doctorado en Genómica Integrativa, Vicerrectoría de Investigación, Universidad Mayor, Santiago 8580745, Chile
- Laboratorio de Redes Biológicas, Centro Científico y Tecnológico de Excelencia Ciencia & Vida, Fundación Ciencia & Vida, Universidad San Sebastián, Santiago 8580704, Chile
| | - J Sebastián Contreras-Riquelme
- Plant Genome Regulation Lab, Centro de Biotecnología Vegetal, Facultad de Ciencias de la Vida, Universidad Andrés Bello, Santiago 8370186, Chile
| | - Mario Sánchez
- Chromatin, Epigenetic, and Neuroscience Laboratory, Centro de Genómica y Bioinformática, Facultad de Ciencias, Ingeniería y Tecnología, Universidad Mayor, Santiago 8580745, Chile
| | - Marisol Cisternas-Olmedo
- Centro de Biología Integrativa, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago 8380455, Chile
- Center for Geroscience, Brain Health, and Metabolism, Santiago 8380453, Chile
| | - René L Vidal
- Centro de Biología Integrativa, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago 8380455, Chile
- Center for Geroscience, Brain Health, and Metabolism, Santiago 8380453, Chile
- Escuela de Biotecnología, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile
| | - Alberto J M Martin
- Laboratorio de Redes Biológicas, Centro Científico y Tecnológico de Excelencia Ciencia & Vida, Fundación Ciencia & Vida, Universidad San Sebastián, Santiago 8580704, Chile
- Escuela de Ingeniería, Facultad de Ingeniería, Arquitectura y Diseño, Universidad San Sebastián, Santiago 7500000, Chile
| | - Mauricio A Sáez
- Chromatin, Epigenetic, and Neuroscience Laboratory, Centro de Genómica y Bioinformática, Facultad de Ciencias, Ingeniería y Tecnología, Universidad Mayor, Santiago 8580745, Chile
- Centro de Oncología de Precisión, Facultad de Medicina Universidad Mayor, Santiago 7560908, Chile
- Laboratorio de Investigación en Salud de Precisión, Departamento de Procesos Diagnósticos y Evaluación, Facultad de Ciencias de la Salud, Universidad Católica de Temuco, Temuco 4813302, Chile
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Vega-Galvez A, Uribe E, Pasten A, Camus J, Gomez-Perez LS, Mejias N, Vidal RL, Grunenwald F, Aguilera LE, Valenzuela-Barra G. Comprehensive Evaluation of the Bioactive Composition and Neuroprotective and Antimicrobial Properties of Vacuum-Dried Broccoli ( Brassica oleracea var. italica) Powder and Its Antioxidants. Molecules 2023; 28:molecules28020766. [PMID: 36677826 PMCID: PMC9860602 DOI: 10.3390/molecules28020766] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2022] [Revised: 01/06/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
In this study, vacuum drying (VD) was employed as an approach to protect the bioactive components of and produce dried broccoli powders with a high biological activity. To achieve these goals, the effects of temperature (at the five levels of 50, 60, 70, 80 and 90 °C) and constant vacuum pressure (10 kPa) were evaluated. The results show that, with the increasing temperature, the drying time decreased. Based on the statistical tests, the Brunauer-Emmett-Teller (BET) model was found to fit well to sorption isotherms, whereas the Midilli and Kucuk model fit well to the drying kinetics. VD has a significant impact on several proximate composition values. As compared with the fresh sample, VD significantly reduced the total phenol, flavonoid and glucosinolate contents. However, it was shown that VD at higher temperatures (80 and 90 °C) contributed to a better antioxidant potential of broccoli powder. In contrast, 50 °C led to a better antimicrobial and neuroprotective effects, presumably due to the formation of isothiocyanate (ITC). Overall, this study demonstrates that VD is a promising technique for the development of extracts from broccoli powders that could be used as natural preservatives or as a neuroprotective agent.
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Affiliation(s)
- Antonio Vega-Galvez
- Food Engineering Department, Faculty of Engineering, Universidad de La Serena, La Serena 1700000, Chile
- Correspondence: ; Tel./Fax: +56-51-220-4446
| | - Elsa Uribe
- Food Engineering Department, Faculty of Engineering, Universidad de La Serena, La Serena 1700000, Chile
- Instituto de Investigación Multidisciplinario en Ciencias y Tecnología, Universidad de La Serena, La Serena 1700000, Chile
| | - Alexis Pasten
- Food Engineering Department, Faculty of Engineering, Universidad de La Serena, La Serena 1700000, Chile
| | - Javiera Camus
- Food Engineering Department, Faculty of Engineering, Universidad de La Serena, La Serena 1700000, Chile
| | - Luis S. Gomez-Perez
- Food Engineering Department, Faculty of Engineering, Universidad de La Serena, La Serena 1700000, Chile
| | - Nicol Mejias
- Food Engineering Department, Faculty of Engineering, Universidad de La Serena, La Serena 1700000, Chile
| | - René L. Vidal
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago 8380000, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago 8380000, Chile
- Geroscience Center for Brain Health and Metabolism, Santiago 8380000, Chile
| | - Felipe Grunenwald
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago 8380000, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago 8380000, Chile
- Geroscience Center for Brain Health and Metabolism, Santiago 8380000, Chile
| | - Lorgio E. Aguilera
- Departamento de Biología, Facultad de Ciencias, Universidad de La Serena, La Serena 1700000, Chile
| | - Gabriela Valenzuela-Barra
- Laboratorio de Productos Naturales, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Santiago 8380000, Chile
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Marín T, Valls C, Jerez C, Huerta T, Elgueta D, Vidal RL, Alvarez AR, Cancino GI. The c-Abl/p73 pathway induces neurodegeneration in a Parkinson's disease model. IBRO Neurosci Rep 2022; 13:378-387. [PMID: 36590096 PMCID: PMC9795287 DOI: 10.1016/j.ibneur.2022.10.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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: 01/31/2022] [Revised: 10/12/2022] [Accepted: 10/17/2022] [Indexed: 11/08/2022] Open
Abstract
Parkinson's disease is the second most common neurodegenerative disorder. Although it is clear that dopaminergic neurons degenerate, the underlying molecular mechanisms are still unknown, and thus, successful treatment is still elusive. One pro-apoptotic pathway associated with several neurodegenerative diseases is the tyrosine kinase c-Abl and its target p73. Here, we evaluated the contribution of c-Abl and p73 in the degeneration of dopaminergic neurons induced by the neurotoxin 6-hydroxydopamine as a model for Parkinson's disease. First, we found that in SH-SY5Y cells treated with 6-hydroxydopamine, c-Abl and p73 phosphorylation levels were up-regulated. Also, we found that the pro-apoptotic p73 isoform TAp73 was up-regulated. Then, to evaluate whether c-Abl tyrosine kinase activity is necessary for 6-hydroxydopamine-induced apoptosis, we co-treated SH-SY5Y cells with 6-hydroxydopamine and Imatinib, a c-Abl specific inhibitor, observing that Imatinib prevented p73 phosphorylation, TAp73 up-regulation, and protected SH-SY5Y cells treated with 6-hydroxydopamine from apoptosis. Interestingly, this observation was confirmed in the c-Abl conditional null mice, where 6-hydroxydopamine stereotaxic injections induced a lesser reduction of dopaminergic neurons than in the wild-type mice significantly. Finally, we found that the intraperitoneal administration of Imatinib prevented the death of dopaminergic neurons induced by injecting 6-hydroxydopamine stereotaxically in the mice striatum. Thus, our findings support the idea that the c-Abl/p73 pathway is involved in 6-hydroxydopamine degeneration and suggest that inhibition of its kinase activity might be used as a therapeutical drug in Parkinson's disease.
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Affiliation(s)
- Tamara Marín
- Cell Signaling Laboratory, Department of Cellular and Molecular Biology, Millennium Institute on Immunology and Immunotherapy, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago 8331010, Chile
| | - Cristian Valls
- Cell Signaling Laboratory, Department of Cellular and Molecular Biology, Millennium Institute on Immunology and Immunotherapy, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago 8331010, Chile
| | - Carolina Jerez
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile
| | - Tomás Huerta
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile
| | - Daniela Elgueta
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile
| | - René L. Vidal
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile
- Center for Geroscience, Brain Health and Metabolism, Santiago 8580745, Chile
| | - Alejandra R. Alvarez
- Cell Signaling Laboratory, Department of Cellular and Molecular Biology, Millennium Institute on Immunology and Immunotherapy, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago 8331010, Chile
- Corresponding author.
| | - Gonzalo I. Cancino
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile
- Department of Cellular and Molecular Biology, Faculty of Biological Sciences, Pontificia Universidad Católica de Chile, Santiago 8331010, Chile
- Corresponding author at: Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago 8580745, Chile.
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Sepúlveda D, Cisternas-Olmedo M, Arcos J, Nassif M, Vidal RL. Contribution of Autophagy-Lysosomal Pathway in the Exosomal Secretion of Alpha-Synuclein and Its Impact in the Progression of Parkinson’s Disease. Front Mol Neurosci 2022; 15:805087. [PMID: 35250476 PMCID: PMC8891570 DOI: 10.3389/fnmol.2022.805087] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 01/07/2022] [Indexed: 01/07/2023] Open
Abstract
Parkinson’s disease (PD) is caused by the degeneration of dopaminergic neurons due to an accumulation of intraneuronal abnormal alpha-synuclein (α-syn) protein aggregates. It has been reported that the levels of exosomal α-syn of neuronal origin in plasma correlate significantly with motor dysfunction, highlighting the exosomes containing α-syn as a potential biomarker of PD. In addition, it has been found that the selective autophagy-lysosomal pathway (ALP) contributes to the secretion of misfolded proteins involved in neurodegenerative diseases. In this review, we describe the evidence that supports the relationship between the ALP and α-syn exosomal secretion on the PD progression and its implications in the diagnosis and progression of this pathology.
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Affiliation(s)
- Denisse Sepúlveda
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Geroscience Center for Brain Health and Metabolism, Santiago, Chile
| | - Marisol Cisternas-Olmedo
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Geroscience Center for Brain Health and Metabolism, Santiago, Chile
| | - Javiera Arcos
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Geroscience Center for Brain Health and Metabolism, Santiago, Chile
| | - Melissa Nassif
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
- Escuela de Biotecnología, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
| | - René L. Vidal
- Center for Integrative Biology, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
- Biomedical Neuroscience Institute, University of Chile, Santiago, Chile
- Geroscience Center for Brain Health and Metabolism, Santiago, Chile
- *Correspondence: René L. Vidal,
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7
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Vidal RL, Sepulveda D, Troncoso-Escudero P, Garcia-Huerta P, Gonzalez C, Plate L, Jerez C, Canovas J, Rivera CA, Castillo V, Cisternas M, Leal S, Martinez A, Grandjean J, Sonia D, Lashuel HA, Martin AJM, Latapiat V, Matus S, Sardi SP, Wiseman RL, Hetz C. Enforced dimerization between XBP1s and ATF6f enhances the protective effects of the UPR in models of neurodegeneration. Mol Ther 2021; 29:1862-1882. [PMID: 33545358 DOI: 10.1016/j.ymthe.2021.01.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [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: 03/09/2020] [Revised: 11/14/2020] [Accepted: 01/21/2021] [Indexed: 02/07/2023] Open
Abstract
Alteration to endoplasmic reticulum (ER) proteostasis is observed in a variety of neurodegenerative diseases associated with abnormal protein aggregation. Activation of the unfolded protein response (UPR) enables an adaptive reaction to recover ER proteostasis and cell function. The UPR is initiated by specialized stress sensors that engage gene expression programs through the concerted action of the transcription factors ATF4, ATF6f, and XBP1s. Although UPR signaling is generally studied as unique linear signaling branches, correlative evidence suggests that ATF6f and XBP1s may physically interact to regulate a subset of UPR target genes. In this study, we designed an ATF6f/XBP1s fusion protein termed UPRplus that behaves as a heterodimer in terms of its selective transcriptional activity. Cell-based studies demonstrated that UPRplus has a stronger effect in reducing the abnormal aggregation of mutant huntingtin and α-synuclein when compared to XBP1s or ATF6 alone. We developed a gene transfer approach to deliver UPRplus into the brain using adeno-associated viruses (AAVs) and demonstrated potent neuroprotection in vivo in preclinical models of Parkinson's disease and Huntington's disease. These results support the concept in which directing UPR-mediated gene expression toward specific adaptive programs may serve as a possible strategy to optimize the beneficial effects of the pathway in different disease conditions.
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Affiliation(s)
- René L Vidal
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Integrative Biology, Universidad Mayor, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile.
| | - Denisse Sepulveda
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Integrative Biology, Universidad Mayor, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Paulina Troncoso-Escudero
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Integrative Biology, Universidad Mayor, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile; Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Paula Garcia-Huerta
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile; Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Constanza Gonzalez
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile; Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Lars Plate
- Department of Chemistry, Department of Biological Sciences, Vanderbilt University, Nashville, TN, USA; Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Carolina Jerez
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - José Canovas
- Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Claudia A Rivera
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Integrative Biology, Universidad Mayor, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Valentina Castillo
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Integrative Biology, Universidad Mayor, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Marisol Cisternas
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Integrative Biology, Universidad Mayor, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Sirley Leal
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Integrative Biology, Universidad Mayor, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile
| | - Alexis Martinez
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile; Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile
| | - Julia Grandjean
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Donzelli Sonia
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Hilal A Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Alberto J M Martin
- Laboratorio de Biología de Redes, Centro de Genómica y Bioinformática, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
| | - Veronica Latapiat
- Laboratorio de Biología de Redes, Centro de Genómica y Bioinformática, Facultad de Ciencias, Universidad Mayor, Santiago, Chile
| | - Soledad Matus
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile; Fundacion Ciencia Vida, Santiago 7780272, Chile; Facultad de Medicina y Ciencia, Universidad San Sebastián, Providencia 7510157, Santiago, Chile
| | - S Pablo Sardi
- Rare and Neurological Diseases Therapeutic Area, Sanofi, 49 New York Avenue, Framingham, MA, USA
| | - R Luke Wiseman
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Claudio Hetz
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile; Center for Geroscience, Brain Health and Metabolism, Santiago, Chile; Program of Cellular and Molecular Biology, Institute of Biomedical Sciences, University of Chile, Santiago, Chile; Buck Institute for Research on Aging, Novato, CA 94945, USA.
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Vidal RL, Rafael M, Boto L, Rios J, Camilo C, Abecasis F, Vieira M. Neonatal respiratory failure due to ABCA3 deficiency. Rev Port Pneumol (2006) 2017; 23:113-114. [PMID: 28038995 DOI: 10.1016/j.rppnen.2016.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 11/02/2016] [Accepted: 11/06/2016] [Indexed: 06/06/2023] Open
Affiliation(s)
- R L Vidal
- Department of Paediatrics, Paediatric Intensive Care Unit, Hospital Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal.
| | - M Rafael
- Department of Paediatrics, Paediatric Intensive Care Unit, Hospital Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal
| | - L Boto
- Department of Paediatrics, Paediatric Intensive Care Unit, Hospital Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal
| | - J Rios
- Department of Paediatrics, Paediatric Intensive Care Unit, Hospital Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal
| | - C Camilo
- Department of Paediatrics, Paediatric Intensive Care Unit, Hospital Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal
| | - F Abecasis
- Department of Paediatrics, Paediatric Intensive Care Unit, Hospital Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal
| | - M Vieira
- Department of Paediatrics, Paediatric Intensive Care Unit, Hospital Santa Maria, Centro Hospitalar Lisboa Norte, Lisboa, Portugal
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Acuña AI, Esparza M, Kramm C, Beltrán FA, Parra AV, Cepeda C, Toro CA, Vidal RL, Hetz C, Concha II, Brauchi S, Levine MS, Castro MA. A failure in energy metabolism and antioxidant uptake precede symptoms of Huntington's disease in mice. Nat Commun 2014; 4:2917. [PMID: 24336051 PMCID: PMC3905737 DOI: 10.1038/ncomms3917] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2013] [Accepted: 11/12/2013] [Indexed: 01/22/2023] Open
Abstract
Huntington's disease has been associated with a failure in energy metabolism and oxidative damage. Ascorbic acid is a powerful antioxidant highly concentrated in the brain where it acts as a messenger, modulating neuronal metabolism. Using an electrophysiological approach in R6/2 HD slices, we observe an abnormal ascorbic acid flux from astrocytes to neurons, which is responsible for alterations in neuronal metabolic substrate preferences. Here using striatal neurons derived from knock-in mice expressing mutant huntingtin (STHdhQ cells), we study ascorbic acid transport. When extracellular ascorbic acid concentration increases, as occurs during synaptic activity, ascorbic acid transporter 2 (SVCT2) translocates to the plasma membrane, ensuring optimal ascorbic acid uptake for neurons. In contrast, SVCT2 from cells that mimic HD symptoms (dubbed HD cells) fails to reach the plasma membrane under the same conditions. We reason that an early impairment of ascorbic acid uptake in HD neurons could lead to early metabolic failure promoting neuronal death.
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Affiliation(s)
- Aníbal I Acuña
- 1] Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [2] Centro de Investigación Sur-Austral en Enfermedades del Sistema Nervioso (CISNe), Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [3] Escuela de Graduados, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [4]
| | - Magdalena Esparza
- 1] Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [2] Centro de Investigación Sur-Austral en Enfermedades del Sistema Nervioso (CISNe), Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [3]
| | - Carlos Kramm
- 1] Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [2] Centro de Investigación Sur-Austral en Enfermedades del Sistema Nervioso (CISNe), Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [3]
| | - Felipe A Beltrán
- 1] Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [2] Centro de Investigación Sur-Austral en Enfermedades del Sistema Nervioso (CISNe), Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [3] Escuela de Graduados, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile
| | - Alejandra V Parra
- 1] Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [2] Centro de Investigación Sur-Austral en Enfermedades del Sistema Nervioso (CISNe), Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile
| | - Carlos Cepeda
- Intellectual and Developmental Disabilities Research Center, Semel Institute for Neuroscience and Human Behavior, Brain Research Institute, The David Geffen School of Medicine, 760 Westwood Plaza, University of California Los Angeles, Los Angeles, California 90095-1759, USA
| | - Carlos A Toro
- 1] Escuela de Graduados, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [2] Instituto de Fisiología, Facultad de Medicina, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile
| | - René L Vidal
- Instituto de Ciencias Biomédicas, Universidad de Chile, Avda, Independencia 1027, Santiago, Chile
| | - Claudio Hetz
- Neurounion Biomedical Foundation, Independencia 1027, Santiago, Chile
| | - Ilona I Concha
- Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile
| | - Sebastián Brauchi
- 1] Centro de Investigación Sur-Austral en Enfermedades del Sistema Nervioso (CISNe), Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [2] Instituto de Fisiología, Facultad de Medicina, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile
| | - Michael S Levine
- Intellectual and Developmental Disabilities Research Center, Semel Institute for Neuroscience and Human Behavior, Brain Research Institute, The David Geffen School of Medicine, 760 Westwood Plaza, University of California Los Angeles, Los Angeles, California 90095-1759, USA
| | - Maite A Castro
- 1] Instituto de Bioquímica y Microbiología, Facultad de Ciencias, Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile [2] Centro de Investigación Sur-Austral en Enfermedades del Sistema Nervioso (CISNe), Universidad Austral de Chile, Campus Isla Teja s/n, Valdivia, 5090000 Chile
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Vidal RL, Fuentes P, Valenzuela JI, Alvarado-Diaz CP, Ramírez OA, Kukuljan M, Couve A. RNA interference of Marlin-1/Jakmip1 results in abnormal morphogenesis and migration of cortical pyramidal neurons. Mol Cell Neurosci 2012; 51:1-11. [DOI: 10.1016/j.mcn.2012.07.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2012] [Revised: 07/04/2012] [Accepted: 07/17/2012] [Indexed: 10/28/2022] Open
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Vidal RL, Hetz C. Crosstalk between the UPR and autophagy pathway contributes to handling cellular stress in neurodegenerative disease. Autophagy 2012; 8:970-2. [PMID: 22617512 DOI: 10.4161/auto.20139] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Huntington disease (HD) is caused by an extended polyglutamine [poly(Q)] stretch in the Huntingtin (HTT) protein, and is associated with the accumulation of intracellular protein aggregates, onset of progressive chorea, psychiatric symptoms and dementia. Although the mechanism underlying the pathological effects of mutant HTT (mHTT) remains highly controversial, accumulating evidence suggest that protein-folding stress at the endoplasmic reticulum (ER) may contribute to mHTT-mediated degeneration. ER stress is alleviated by the activation of an adaptive reaction known as the unfolded protein response (UPR), whereas chronic ER stress triggers apoptosis by the same pathway. However, most of the studies linking ER stress with HD in vivo are correlative. UPR signaling is initiated by the activation of at least three distinct stress sensors located at the ER membrane known as ERN1/IRE1α, EIF2AK3/PERK and ATF6. These stress sensors control the expression of specialized transcription factors that modulate the upregulation of a variety of target genes involved in folding, protein quality control, autophagy and protein synthesis.
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Affiliation(s)
- René L Vidal
- Biomedical Neuroscience Institute, Faculty of Medicine, University of Chile, Santiago, Chile
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Ramírez OA, Vidal RL, Tello JA, Vargas KJ, Kindler S, Härtel S, Couve A. Dendritic assembly of heteromeric gamma-aminobutyric acid type B receptor subunits in hippocampal neurons. J Biol Chem 2009; 284:13077-85. [PMID: 19276079 PMCID: PMC2676040 DOI: 10.1074/jbc.m900575200] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Revised: 03/09/2009] [Indexed: 01/27/2023] Open
Abstract
Understanding the mechanisms that control synaptic efficacy through the availability of neurotransmitter receptors depends on uncovering their specific intracellular trafficking routes. gamma-Aminobutyric acid type B (GABA(B)) receptors (GABA(B)Rs) are obligatory heteromers present at dendritic excitatory and inhibitory postsynaptic sites. It is unknown whether synthesis and assembly of GABA(B)Rs occur in the somatic endoplasmic reticulum (ER) followed by vesicular transport to dendrites or whether somatic synthesis is followed by independent transport of the subunits for assembly and ER export throughout the somatodendritic compartment. To discriminate between these possibilities we studied the association of GABA(B)R subunits in dendrites of hippocampal neurons combining live fluorescence microscopy, biochemistry, quantitative colocalization, and bimolecular fluorescent complementation. We demonstrate that GABA(B)R subunits are segregated and differentially mobile in dendritic intracellular compartments and that a high proportion of non-associated intracellular subunits exist in the brain. Assembled heteromers are preferentially located at the plasma membrane, but blockade of ER exit results in their intracellular accumulation in the cell body and dendrites. We propose that GABA(B)R subunits assemble in the ER and are exported from the ER throughout the neuron prior to insertion at the plasma membrane. Our results are consistent with a bulk flow of segregated subunits through the ER and rule out a post-Golgi vesicular transport of preassembled GABA(B)Rs.
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Affiliation(s)
- Omar A Ramírez
- Physiology and Biophysics, Faculty of Medicine, Universidad de Chile, Santiago, Chile
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Vidal RL, Valenzuela JI, Luján R, Couve A. Cellular and subcellular localization of Marlin-1 in the brain. BMC Neurosci 2009; 10:37. [PMID: 19386132 PMCID: PMC2685396 DOI: 10.1186/1471-2202-10-37] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2008] [Accepted: 04/22/2009] [Indexed: 02/07/2023] Open
Abstract
Background Marlin-1 is a microtubule binding protein that associates specifically with the GABAB1 subunit in neurons and with members of the Janus kinase family in lymphoid cells. In addition, it binds the molecular motor kinesin-I and nucleic acids, preferentially single stranded RNA. Marlin-1 is expressed mainly in the central nervous system but little is known regarding its cellular and subcellular distribution in the brain. Results Here we have studied the localization of Marlin-1 in the rodent brain and cultured neurons combining immunohistochemistry, immunofluorescence and pre-embedding electron microscopy. We demonstrate that Marlin-1 is enriched in restricted areas of the brain including olfactory bulb, cerebral cortex, hippocampus and cerebellum. Marlin-1 is abundant in dendrites and axons of GABAergic and non-GABAergic hippocampal neurons. At the ultrastructural level, Marlin-1 is present in the cytoplasm and the nucleus of CA1 neurons in the hippocampus. In the cytoplasm it associates to microtubules in the dendritic shaft and occasionally with the Golgi apparatus, the endoplasmic reticulum (ER) and dendritic spines. In the nucleus, clusters of Marlin-1 associate to euchromatin. Conclusion Our results demonstrate that Marlin-1 is expressed in discrete areas of the brain. They also confirm the microtubule association at the ultrastructural level in neurons. Together with the abundance of the protein in dendrites and axons they are consistent with the emerging role of Marlin-1 as an intracellular protein linking the cytoskeleton and transport. Our study constitutes the first detailed description of the cellular and subcellular distribution of Marlin-1 in the brain. As such, it will set the basis for future studies on the functional implications of Marlin-1 in protein trafficking.
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Affiliation(s)
- René L Vidal
- Fisiología y Biofísica, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Independencia, Santiago, Chile.
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Vidal RL, Ramírez A, Castro M, Concha II, Couve A. Marlin-1 is expressed in testis and associates to the cytoskeleton and GABAB receptors. J Cell Biochem 2008; 103:886-95. [PMID: 17668444 DOI: 10.1002/jcb.21456] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Marlin-1 is a GABA(B) receptor and Jak tyrosine kinase-binding protein that also associates with RNA and microtubules. In humans and rodents, expression of Marlin-1 is predominantly restricted to the brain, but expression in lymphoid cells has also been reported. Here, we have studied the distribution of Marlin-1 in testis and spermatozoa. Our results indicate that Marlin-1 is highly expressed in testis. The protein is abundant in spermatogonia, spermatocytes, spermatozoa, and Sertoli cells. We also have studied the subcellular distribution in spermatozoa. Marlin-1 is present in the tail and to a lesser degree in the head of the sperm cell. Finally, we have explored two protein interactions. Our findings demonstrate that Marlin-1 associates with a microtubule fraction and with GABA(B) receptors in testis suggesting that the set of protein interactions of Marlin-1 are conserved in different tissues.
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Affiliation(s)
- René L Vidal
- Institute of Biochemistry, Universidad Austral de Chile, Isla Teja, Valdivia, Chile
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Vidal RL, Ramírez OA, Sandoval L, Koenig-Robert R, Härtel S, Couve A. Marlin-1 and conventional kinesin link GABAB receptors to the cytoskeleton and regulate receptor transport. Mol Cell Neurosci 2007; 35:501-12. [PMID: 17532644 DOI: 10.1016/j.mcn.2007.04.008] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2006] [Revised: 04/10/2007] [Accepted: 04/25/2007] [Indexed: 01/22/2023] Open
Abstract
The cytoskeleton and cytoskeletal motors play a fundamental role in neurotransmitter receptor trafficking, but proteins that link GABA(B) receptors (GABA(B)Rs) to the cytoskeleton have not been described. We recently identified Marlin-1, a protein that interacts with GABA(B)R1. Here, we explore the association of GABA(B)Rs and Marlin-1 to the cytoskeleton using a combination of biochemistry, microscopy and live cell imaging. Our results indicate that Marlin-1 is associated to microtubules and the molecular motor kinesin-I. We demonstrate that a fraction of Marlin-1 is mobile in dendrites of cultured hippocampal neurons and that mobility is microtubule-dependent. We also show that GABA(B)Rs interact robustly with kinesin-I and that intracellular membranes containing GABA(B)Rs are sensitive to treatments that disrupt a protein complex containing Marlin-1, kinesin-I and tubulin. Finally, we report that a kinesin-I mutant severely impairs receptor transport. We conclude that Marlin-1 and kinesin-1 link GABA(B)Rs to the tubulin cytoskeleton in neurons.
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Affiliation(s)
- René L Vidal
- Physiology and Biophysics, ICBM, Faculty of Medicine, Universidad de Chile Independencia 1027, Santiago, Chile
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