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de Laorden EH, Simón D, Milla S, Portela-Lomba M, Mellén M, Sierra J, de la Villa P, Moreno-Flores MT, Iglesias M. Human placenta-derived mesenchymal stem cells stimulate neuronal regeneration by promoting axon growth and restoring neuronal activity. Front Cell Dev Biol 2023; 11:1328261. [PMID: 38188022 PMCID: PMC10766706 DOI: 10.3389/fcell.2023.1328261] [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: 10/26/2023] [Accepted: 12/11/2023] [Indexed: 01/09/2024] Open
Abstract
In the last decades, mesenchymal stem cells (MSCs) have become the cornerstone of cellular therapy due to their unique characteristics. Specifically human placenta-derived mesenchymal stem cells (hPMSCs) are highlighted for their unique features, including ease to isolate, non-invasive techniques for large scale cell production, significant immunomodulatory capacity, and a high ability to migrate to injuries. Researchers are exploring innovative techniques to overcome the low regenerative capacity of Central Nervous System (CNS) neurons, with one promising avenue being the development of tailored mesenchymal stem cell therapies capable of promoting neural repair and recovery. In this context, we have evaluated hPMSCs as candidates for CNS lesion regeneration using a skillful co-culture model system. Indeed, we have demonstrated the hPMSCs ability to stimulate damaged rat-retina neurons regeneration by promoting axon growth and restoring neuronal activity both under normoxia and hypoxia conditions. With our model we have obtained neuronal regeneration values of 10%-14% and axonal length per neuron rates of 19-26, μm/neuron. To assess whether the regenerative capabilities of hPMSCs are contact-dependent effects or it is mediated through paracrine mechanisms, we carried out transwell co-culture and conditioned medium experiments confirming the role of secreted factors in axonal regeneration. It was found that hPMSCs produce brain derived, neurotrophic factor (BDNF), nerve-growth factor (NGF) and Neurotrophin-3 (NT-3), involved in the process of neuronal regeneration and restoration of the physiological activity of neurons. In effect, we confirmed the success of our treatment using the patch clamp technique to study ionic currents in individual isolated living cells demonstrating that in our model the regenerated neurons are electrophysiologically active, firing action potentials. The outcomes of our neuronal regeneration studies, combined with the axon-regenerating capabilities exhibited by mesenchymal stem cells derived from the placenta, present a hopeful outlook for the potential therapeutic application of hPMSCs in the treatment of neurological disorders.
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Affiliation(s)
- Elvira H. de Laorden
- Facultad de C.C. Experimentales, Universidad Francisco de Vitoria, Madrid, Spain
| | - Diana Simón
- Facultad de C.C. Experimentales, Universidad Francisco de Vitoria, Madrid, Spain
| | - Santiago Milla
- Departamento de Biología de Sistemas, Unidad de Fisiología, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá, Alcalá de Henares, Spain
| | - María Portela-Lomba
- Facultad de C.C. Experimentales, Universidad Francisco de Vitoria, Madrid, Spain
| | - Marian Mellén
- Facultad de C.C. Experimentales, Universidad Francisco de Vitoria, Madrid, Spain
| | - Javier Sierra
- Facultad de C.C. Experimentales, Universidad Francisco de Vitoria, Madrid, Spain
| | - Pedro de la Villa
- Departamento de Biología de Sistemas, Unidad de Fisiología, Facultad de Medicina y Ciencias de la Salud, Universidad de Alcalá, Alcalá de Henares, Spain
| | - María Teresa Moreno-Flores
- Departamento de Anatomía, Histología y Neurociencia, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - Maite Iglesias
- Facultad de C.C. Experimentales, Universidad Francisco de Vitoria, Madrid, Spain
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Yan N, Shi XL, Tang LQ, Wang DF, Li X, Liu C, Liu ZP. Synthesis and biological evaluation of thieno[3,2- c]pyrazol-3-amine derivatives as potent glycogen synthase kinase 3β inhibitors for Alzheimer's disease. J Enzyme Inhib Med Chem 2022; 37:1724-1736. [PMID: 35698879 PMCID: PMC9225722 DOI: 10.1080/14756366.2022.2086867] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
Glycogen synthase kinase 3β (GSK-3β) catalyses the hyperphosphorylation of tau protein in the Alzheimer's disease (AD) pathology. A series of novel thieno[3,2-c]pyrazol-3-amine derivatives were designed and synthesised and evaluated as potential GSK-3β inhibitors by structure-guided drug rational design approach. The thieno[3,2-c]pyrazol-3-amine derivative 16b was identified as a potent GSK-3β inhibitor with an IC50 of 3.1 nM in vitro and showed accepted kinase selectivity. In cell levels, 16b showed no toxicity on the viability of SH-SY5Y cells at the concentration up to 50 μM and targeted GSK-3β with the increased phosphorylated GSK-3β at Ser9. Western blot analysis indicated that 16b decreased the phosphorylated tau at Ser396 in a dose-dependent way. Moreover, 16b effectively increased expressions of β-catenin as well as the GAP43, N-myc, and MAP-2, and promoted the differentiated neuronal neurite outgrowth. Therefore, the thieno[3,2-c]pyrazol-3-amine derivative 16b could serve as a promising GSK-3β inhibitor for the treatment of AD.
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Affiliation(s)
- Ning Yan
- Institute of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Xiao-Long Shi
- Institute of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Long-Qian Tang
- Institute of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - De-Feng Wang
- Institute of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Xun Li
- Institute of Materia Medica, Shandong First Medical University & Shandong Academy of Medical Sciences, Jinan, PR China
| | - Chao Liu
- Institute of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
| | - Zhao-Peng Liu
- Institute of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, Jinan, PR China
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Wang XX, Xie F, Jia CC, Yan N, Zeng YL, Wu JD, Liu ZP. Synthesis and biological evaluation of selective histone deacetylase 6 inhibitors as multifunctional agents against Alzheimer's disease. Eur J Med Chem 2021; 225:113821. [PMID: 34517222 DOI: 10.1016/j.ejmech.2021.113821] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Revised: 08/30/2021] [Accepted: 08/31/2021] [Indexed: 01/08/2023]
Abstract
Histone deacetylase 6 (HDAC6) is a potential target for Alzheimer's disease (AD). In this study, a series of novel phenothiazine-, memantine-, and 1,2,3,4-tetrahydro-γ-carboline-based HDAC6 inhibitors with a variety of linker moieties were designed and synthesized. As a hydrochloride salt, the phenothiazine-based hydroxamic acid W5 with a pyridyl-containing linker motif was identified as a high potent and selective HDAC6 inhibitor. It inhibited HDAC6 with an IC50 of 2.54 nM and was more than 290- to 3300-fold selective over other HDAC isoforms. In SH-SY5Y cells, W5 dose-dependently increased the acetylated α-tubulin levels and reduced the hyperphosphorylated tau proteins at Ser396. As an effective metal chelator, W5 inhibited Cu2+-induced Aβ1-42 aggregation and disaggregated Cu2+-Aβ1-42 oligomers, and showed protective effects on the SH-SY5Y cells against Aβ1-42- as well as Cu2+-Aβ1-42 induced cell damages, serving as a potential ligand to target AD metal dyshomeostasis. Moreover, W5 promoted the differentiated neuronal neurite outgrowth, increased the mRNA expression of the recognized neurogenesis markers, GAP43, N-myc, and MAP-2. Therefore, W5 might be a good lead for the development of novel HDAC6 inhibitors targeting multi-facets of AD.
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Affiliation(s)
- Xiu-Xiu Wang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, PR China
| | - Fei Xie
- Department of Pharmacy, Qilu Hospital of Shandong University, Jinan, 250012, PR China
| | - Cong-Cong Jia
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, PR China
| | - Ning Yan
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, PR China
| | - Yan-Li Zeng
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, PR China
| | - Jing-De Wu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, PR China.
| | - Zhao-Peng Liu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, 250012, PR China.
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Shi XL, Yan N, Cui YJ, Liu ZP. A Unique GSK-3β inhibitor B10 Has a Direct Effect on Aβ, Targets Tau and Metal Dyshomeostasis, and Promotes Neuronal Neurite Outgrowth. Cells 2020; 9:cells9030649. [PMID: 32155989 PMCID: PMC7140427 DOI: 10.3390/cells9030649] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/02/2020] [Accepted: 03/05/2020] [Indexed: 02/07/2023] Open
Abstract
Due to the complicated pathogenesis of Alzheimer's disease (AD), the development of multitargeted agents to simultaneously interfere with multiple pathological processes of AD is a potential choice. Glycogen synthase kinase-3β (GSK-3β) plays a vital role in the AD pathological process. In this study, we discovered a novel 1H-pyrrolo[2,3-b]pyridine derivative B10 as a GSK-3β inhibitor that features with a quinolin-8-ol moiety to target the metal dyshomeostasis of AD. B10 potently inhibited GSK-3β with an IC50 of 66 ± 2.5 nM. At the concentration of 20 μM, B10 increased β-catenin abundance (β-catenin/GAPDH: 0.83 ± 0.086 vs. 0.30 ± 0.016), phosphorylated GSK-3β at Ser9 (p-GSK-3β/GAPDH: 0.53 ± 0.045 vs. 0.35 ± 0.012), and decreased the phosphorylated tau level (p-tau/GAPDH: 0.33 ± 0.065 vs. 0.83 ± 0.061) in SH-SY5Y cells. Unlike other GSK-3β inhibitors, B10 had a direct effect on Aβ by inhibiting Aβ1-42 aggregation and promoting the Aβ1-42 aggregate disassociation. It selectively chelated with Cu2+, Zn2+, Fe3+, and Al3+, and targeted AD metal dyshomeostasis. Moreover, B10 effectively increased the mRNA expression of the recognized neurogenesis markers, GAP43, N-myc, and MAP-2, and promoted the differentiated neuronal neurite outgrowth, possibly through the GSK-3β and β-catenin signal pathways. Therefore, B10 is a potent and unique GSK-3β inhibitor that has a direct on Aβ and serves as a multifunctional anti-AD agent for further investigations.
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Popović J, Klajn A, Paunesku T, Ma Q, Chen S, Lai B, Stevanović M, Woloschak GE. Neuroprotective Role of Selected Antioxidant Agents in Preventing Cisplatin-Induced Damage of Human Neurons In Vitro. Cell Mol Neurobiol 2019; 39:619-636. [PMID: 30874981 PMCID: PMC6535150 DOI: 10.1007/s10571-019-00667-7] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 02/28/2019] [Indexed: 12/17/2022]
Abstract
Chemotherapy-induced peripheral neuropathy (CIPN) is a side effect of platinum-based chemotherapy and decreases the quality of life of cancer patients. We compared neuroprotective properties of several agents using an in vitro model of terminally differentiated human cells NT2-N derived from cell line NT2/D1. Sodium azide and an active metabolite of amifostine (WR1065) increase cell viability in simultaneous treatment with cisplatin. In addition, WR1065 protects the non-dividing neurons by decreasing cisplatin caused oxidative stress and apoptosis. Accumulation of Pt in cisplatin-treated cells was heterogeneous, but the frequency and concentration of Pt in cells were lowered in the presence of WR1065 as shown by X-ray fluorescence microscopy (XFM). Transition metals accumulation accompanied Pt increase in cells; this effect was equally diminished in the presence of WR1065. To analyze possible chemical modulation of Pt-DNA bonds, we examined the platinum LIII near edge spectrum by X-ray absorption spectroscopy. The spectrum found in cisplatin-DNA samples is altered differently by the addition of either WR1065 or sodium azide. Importantly, a similar change in Pt edge spectra was noted in cells treated with cisplatin and WR1065. Therefore, amifostine should be reconsidered as a candidate for treatments that reduce or prevent CIPN.
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Affiliation(s)
- Jelena Popović
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, 11010, Serbia
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA
| | - Andrijana Klajn
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, 11010, Serbia
| | - Tatjana Paunesku
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA
| | - Qing Ma
- DND CAT, Northwestern Synchrotron Research Center at the Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Si Chen
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Barry Lai
- X-ray Science Division, Advanced Photon Source, Argonne National Laboratory, 9700 South Cass Avenue, Argonne, IL, 60439, USA
| | - Milena Stevanović
- Institute of Molecular Genetics and Genetic Engineering, University of Belgrade, Belgrade, 11010, Serbia.
- Faculty of Biology, University of Belgrade, Belgrade, 11000, Serbia.
- Serbian Academy of Sciences and Arts, Belgrade, 11000, Serbia.
| | - Gayle E Woloschak
- Feinberg School of Medicine, Department of Radiation Oncology, Northwestern University, Chicago, IL, 60611, USA.
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Barón-Mendoza I, García O, Calvo-Ochoa E, Rebollar-García JO, Garzón-Cortés D, Haro R, González-Arenas A. Alterations in neuronal cytoskeletal and astrocytic proteins content in the brain of the autistic-like mouse strain C58/J. Neurosci Lett 2018; 682:32-38. [PMID: 29885454 DOI: 10.1016/j.neulet.2018.06.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Revised: 06/01/2018] [Accepted: 06/05/2018] [Indexed: 12/22/2022]
Abstract
Autism spectrum disorder (ASD) is a neurodevelopment disorder characterized by deficient social interaction, impaired communication as well as repetitive behaviors. ASD subjects present connectivity and neuroplasticity disturbances associated with morphological alterations in axons, dendrites, and dendritic spines. Given that the neuronal cytoskeleton and astrocytes have an essential role in regulating several mechanisms of neural plasticity, the aim of this work was to study alterations in the content of neuronal cytoskeletal components actin and tubulin and their associated proteins, as well as astrocytic proteins GFAP and TSP-1 in the brain of a C58/J mouse model of ASD. We determined the expression and regulatory phosphorylation state of cytoskeletal components in the prefrontal cortex, hippocampus, and cerebellum of C58/J mice by means of Western blotting. Our results show that autistic-like mice present: 1) region-dependent altered expression and phosphorylation patterns of Tau isoforms, associated with anomalous microtubule depolymerization; 2) reduced MAP2 A content in prefrontal cortex; 3) region-dependent changes in cofilin expression and phosphorylation, associated with abnormal actin filament depolymerizing dynamics; 4) diminished synaptopodin levels in the hippocampus; and 5) reduced content of the astrocyte-secreted protein TSP-1 in the prefrontal cortex and hippocampus. Our work demonstrates changes in the expression and phosphorylation of cytoskeletal proteins as well as in TSP-1 in the brain of the autistic-like mice C58/J, shedding light in one of the possible molecular mechanisms underpinning neuroplasticity alterations in the ASD brain and laying the foundation for future investigations in this topic.
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Affiliation(s)
- Isabel Barón-Mendoza
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Octavio García
- Departamento de Psicobiología y Neurociencias, Facultad de Psicología, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Erika Calvo-Ochoa
- Department of Biological Sciences, Western Michigan University, Kalamazoo, MI, USA
| | - Jorge Omar Rebollar-García
- Unidad de Modelos Biológicos, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Daniel Garzón-Cortés
- Unidad de Modelos Biológicos, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México
| | - Reyes Haro
- Instituto Mexicano de Medicina Integral de Sueño, Ciudad de México, México
| | - Aliesha González-Arenas
- Departamento de Medicina Genómica y Toxicología Ambiental, Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Ciudad de México, México.
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Wang Y, Wang Y, Dong J, Wei W, Song B, Min H, Teng W, Chen J. Developmental hypothyroxinaemia and hypothyroidism limit dendritic growth of cerebellar Purkinje cells in rat offspring: involvement of microtubule-associated protein 2 (MAP2) and stathmin. Neuropathol Appl Neurobiol 2015; 40:398-415. [PMID: 23841869 DOI: 10.1111/nan.12074] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Accepted: 07/04/2013] [Indexed: 11/28/2022]
Abstract
AIMS Iodine is essential for the synthesis of thyroid hormone. Iodine deficiency (ID)-induced hypothyroxinaemia and hypothyroidism during developmental period contribute to impairments of function in the brain, such as psychomotor and motor alterations. However, the mechanisms are still unclear. Therefore, the present research is to study the effects of developmental hypothyroxinaemia caused by mild ID and developmental hypothyroidism caused by severe ID or methimazole (MMZ) on dendritic growth in filial cerebellar Purkinje cells (PCs) and the underlying mechanisms. METHODS A maternal hypothyroxinaemia model was established in Wistar rats using a mild ID diet, and two maternal hypothyroidism models were developed with either severe ID diet or MMZ water. We examined the total dendritic length using immunofluorescence, and Western blot analysis was conducted to investigate the activity of microtubule-associated protein 2 (MAP2), stathmin and calcium/calmodulin-dependent protein kinase II (CaMKII). RESULTS Hypothyroxinaemia and hypothyroidism reduced the total dendritic length of cerebellar PCs, decreased MAP2 and its phosphorylation, increased stathmin but reduced its phosphorylation and down-regulated the activity of CaMKII and its phosphorylation in cerebellar PCs on postnatal day (PN) 7, PN14 and PN21. CONCLUSION Developmental hypothyroxinaemia induced by mild ID and hypothyroidism induced by severe ID or MMZ limit PCs dendritic growth, which may involve in the disturbance of MAP2 and stathmin in a CaMKII-dependent manner. It suggests a potential mechanism of motor coordination impairments caused by developmental hypothyroxinaemia and hypothyroidism.
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Affiliation(s)
- Yuan Wang
- Department of Occupational and Environmental Health, School of Public Health, China Medical University, Shenyang, China
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Havranek T, Zatkova M, Lestanova Z, Bacova Z, Mravec B, Hodosy J, Strbak V, Bakos J. Intracerebroventricular oxytocin administration in rats enhances object recognition and increases expression of neurotrophins, microtubule-associated protein 2, and synapsin I. J Neurosci Res 2015; 93:893-901. [DOI: 10.1002/jnr.23559] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2014] [Revised: 12/05/2014] [Accepted: 12/22/2014] [Indexed: 11/11/2022]
Affiliation(s)
- Tomas Havranek
- Institute of Experimental Endocrinology; Slovak Academy of Sciences; Bratislava Slovakia
| | - Martina Zatkova
- Institute of Experimental Endocrinology; Slovak Academy of Sciences; Bratislava Slovakia
| | - Zuzana Lestanova
- Institute of Experimental Endocrinology; Slovak Academy of Sciences; Bratislava Slovakia
| | - Zuzana Bacova
- Institute of Experimental Endocrinology; Slovak Academy of Sciences; Bratislava Slovakia
- Department of Normal and Pathological Physiology; Faculty of Medicine, Slovak Medical University; Bratislava Slovakia
| | - Boris Mravec
- Institute of Experimental Endocrinology; Slovak Academy of Sciences; Bratislava Slovakia
- Institute of Physiology; Faculty of Medicine, Comenius University; Bratislava Slovakia
| | - Julius Hodosy
- Institute of Physiology; Faculty of Medicine, Comenius University; Bratislava Slovakia
- Institute of Molecular Biomedicine; Faculty of Medicine, Comenius University; Bratislava Slovakia
| | - Vladimir Strbak
- Institute of Experimental Endocrinology; Slovak Academy of Sciences; Bratislava Slovakia
- Department of Normal and Pathological Physiology; Faculty of Medicine, Slovak Medical University; Bratislava Slovakia
| | - Jan Bakos
- Institute of Experimental Endocrinology; Slovak Academy of Sciences; Bratislava Slovakia
- Institute of Physiology; Faculty of Medicine, Comenius University; Bratislava Slovakia
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Simon D, Herva ME, Benitez MJ, Garrido JJ, Rojo AI, Cuadrado A, Torres JM, Wandosell F. Dysfunction of the PI3K-Akt-GSK-3 pathway is a common feature in cell culture and in vivo models of prion disease. Neuropathol Appl Neurobiol 2014; 40:311-26. [PMID: 23741998 DOI: 10.1111/nan.12066] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2012] [Accepted: 06/04/2013] [Indexed: 11/29/2022]
Abstract
AIMS Transmissible spongiform encephalopathies, also called prion diseases, are characterized by the cerebral accumulation of misfolded prion protein (PrP(SC) ) and subsequent neurodegeneration. However, despite considerable research effort, the molecular mechanisms underlying prion-induced neurodegeneration are poorly understood. Here, we explore the hypothesis that prions induce dysfunction of the PI3K/Akt/GSK-3 signalling pathway. METHODS We employed two parallel approaches. Using cell cultures derived from mouse primary neurones and from a human neuronal cell line, we identified common elements that were modified by the neurotoxic fragment of PrP(106-126) . These studies were then complemented by comparative analyses in a mouse model of prion infection. RESULTS The presence of a polymerized fragment of the prion protein (PrP(106-126) ) or of a prion strain altered PI3K-mediated signalling, as evidenced by Akt inhibition and GSK-3 activation. PI3K activation by the addition of insulin or the expression of a constitutively active Akt mutant restored normal levels of Akt and GSK-3 activity. These changes were correlated with a reduction in caspase activity and an increase in neuronal survival. Moreover, we found that activation of caspase 3, Erk and GSK-3 are common features of PrP(106-126) -mediated neurotoxicity in cellular systems and prion infection in the mouse cerebellum, while activation of caspase 12 and JNK was observed in cellular models. CONCLUSIONS Our findings in cell culture and in vivo models of prion disease demonstrate marked alterations to the PI3K/Akt/GSK-3 pathway and suggest that two additional pathways contribute to PrP-induced neurotoxicity as responsible of JNK and caspase 12 activation.
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Affiliation(s)
- D Simon
- Centro de Biología Molecular 'Severo Ochoa', CSIC-UAM, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Unv. Autónoma de Madrid, Madrid, Spain
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Mueller AM, Pedré X, Stempfl T, Kleiter I, Couillard-Despres S, Aigner L, Giegerich G, Steinbrecher A. Novel role for SLPI in MOG-induced EAE revealed by spinal cord expression analysis. J Neuroinflammation 2008; 5:20. [PMID: 18501024 PMCID: PMC2438345 DOI: 10.1186/1742-2094-5-20] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2008] [Accepted: 05/26/2008] [Indexed: 11/10/2022] Open
Abstract
Background Experimental autoimmune encephalomyelitis (EAE) induced by myelin oligodendrocyte protein (MOG) in female Dark Agouti (DA) rats is a chronic demyelinating animal model of multiple sclerosis (MS). To identify new candidate molecules involved in the evolution or repair of EAE-lesions we used Affymetrix oligonucleotide microarrays to compare the spinal cord transcriptome at the peak of EAE, during remission and at the first relapse with healthy DA rats. Methods Untreated DA rats and DA rats immunised with MOG protein were sacrificed at defined time points. Total RNA was isolated from spinal cord tissue and used for hybridization of Affymetrix rat genome arrays RG U34 A-C. Selected expression values were confirmed by RealTime PCR. Adult neural stem cells were incubated with recombinant secretory leukocyte protease inhibitor (SLPI). Proliferation was assessed by BrdU incorporation, cyclin D1 and HES1 expression by RealTime PCR, cell differentiation by immunofluorescence analysis and IkappaBalpha degradation by Western blot. Results Among approximately 26,000 transcripts studied more than 1,100 were differentially regulated. Focussing on functional themes, we noticed a sustained downregulation of most of the transcripts of the cholesterol biosynthesis pathway. Furthermore, we found new candidate genes possibly contributing to regenerative processes in the spinal cord. Twelve transcripts were solely upregulated in the recovery phase, including genes not previously associated with repair processes. Expression of SLPI was upregulated more than hundredfold during EAE attack. Using immunohistochemistry, SLPI was identified in macrophages, activated microglia, neuronal cells and astrocytes. Incubation of adult neural stem cells (NSC) with recombinant SLPI resulted in an increase of cell proliferation and of differentiation towards oligodendrocytes. These processes were paralleled by an upregulation of the cell-cycle promotor cyclin D1 and a suppression of the cell differentiation regulator HES1. Finally, SLPI prevented the degradation of IkappaBalpha, which may explain the suppression of the cell differentiation inhibitor HES1 suggesting a possible mechanism of oligodendroglial differentiation. Conclusion We identified novel features of gene expression in the CNS during EAE, in particular the suppression of genes of cholesterol biosynthesis and a strong upregulation of SLPI, a gene which is for the first time associated with autoimmune inflammation. The capacity of SLPI to increase proliferation of adult NSC and of oligodendroglial differentiation suggests a novel role for SLPI in the promotion of tissue repair, beyond its known functions in the prevention of tissue damages by protease inhibition damage and modulation of inflammatory reactions.
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Affiliation(s)
- Andre M Mueller
- Department of Neurology, University of Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
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Association of Gap-43 (neuromodulin) with microtubule-associated protein MAP-2 in neuronal cells. Biochem Biophys Res Commun 2008; 371:679-83. [PMID: 18455509 DOI: 10.1016/j.bbrc.2008.04.119] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Accepted: 04/19/2008] [Indexed: 11/21/2022]
Abstract
Gap-43 (B-50, neuromodulin) is a presynaptic protein implicated in axonal growth, neuronal differentiation, plasticity, and regeneration. Its activities are regulated by its dynamic interactions with various neuronal proteins, including actin and brain spectrin. Recently we have shown that Gap-43 co-localizes with an axonal protein DPYSL-3 in primary cortical neurons. In the present study we provide evidence that Gap-43 co-localizes and potentially interacts with microtubule-associated protein MAP-2 in adult and fetal rat brain, as well as in primary neuronal cultures. Our studies suggest that this interaction may be developmentally regulated.
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Gingras M, Champigny MF, Berthod F. Differentiation of human adult skin-derived neuronal precursors into mature neurons. J Cell Physiol 2007; 210:498-506. [PMID: 17111366 DOI: 10.1002/jcp.20889] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The isolation of autologous neuronal precursors from skin-derived precursor cells extracted from adult human skin would be a very efficient source of neurons for the treatment of various neurodegenerative diseases. The purpose of this study was to demonstrate that these neuronal precursors were able to differentiate into mature neurons. We isolated neuronal precursors from breast skin and expanded them in vitro for over ten passages. We showed that 48% of these cells were proliferating after the first passage, while this growth rate decreased after the second passage. We demonstrated that 70% of these cells were nestin-positive after the third passage, while only 17% were neurofilament M-positive after 7 days of differentiation. These neuronal precursors expressed betaIII tubulin, the dendritic marker MAP2 and the presynaptic marker synaptophysin after 7 days of in vitro maturation. They also expressed the postsynaptic marker PSD95 and the late neuronal markers NeuN and neurofilament H after 21 days of differentiation, demonstrating they became terminally differentiated neurons. These markers were still expressed after 50 days of culture. The generation of autologous neurons from an accessible adult human source opens many potential therapeutic applications and has a great potential for the development of experimental studies on normal human neurons.
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Affiliation(s)
- Marie Gingras
- Laboratoire d'Organogénèse Expérimentale (LOEX), Centre Hospitalier Affilié Universitaire de Québec, Hôpital du St-Sacrement and Département de Chirurgie, Faculté de Médecine, Université Laval, Québec, Canada
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Misonou H, Trimmer JS. A primary culture system for biochemical analyses of neuronal proteins. J Neurosci Methods 2004; 144:165-73. [PMID: 15910974 DOI: 10.1016/j.jneumeth.2004.11.007] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2004] [Revised: 11/03/2004] [Accepted: 11/03/2004] [Indexed: 11/19/2022]
Abstract
Low-density cultures of embryonic rat hippocampal neurons have been widely used to investigate localization and function of neuronal proteins using immunocytochemistry and electrophysiology. These cultures provide a relatively homogeneous population of hippocampal pyramidal neurons and interneurons compared to post-natal mixed neuron/glial cultures from hippocampus, cerebral cortex, and cerebellum. However, the limited quantity of neurons and the difficulty in harvesting adequate amounts makes biochemical analyses of endogenous neuronal proteins in these low-density cultured neurons difficult. Here, we provide detailed methods to prepare cultures of embryonic rat hippocampal neurons suitable for biochemical analyses of both endogenously and exogenously expressed proteins. The procedures described here are also suitable for comprehensive studies of expression, localization, post-translational modification, and function of neuronal proteins in the same neuronal culture system.
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Affiliation(s)
- Hiroaki Misonou
- Department of Pharmacology, School of Medicine, Genome and Biomedical Sciences Facility, University of California, Davis, CA 95616, USA.
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Abstract
Recent studies indicate the actin and microtubule cytoskeletons are a final common target of many signaling cascades that influence the developing neuron. Regulation of polymer dynamics and transport are crucial for the proper growth cone motility. This review addresses how actin filaments, microtubules, and their associated proteins play crucial roles in growth cone motility, axon outgrowth, and guidance. We present a working model for cytoskeletal regulation of directed axon outgrowth. An important goal for the future will be to understand the coordinated response of the cytoskeleton to signaling cascades induced by guidance receptor activation.
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Affiliation(s)
- Erik W Dent
- Biology Department, 68-270, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
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Pérez M, Rojo AI, Wandosell F, Díaz-Nido J, Avila J. Prion peptide induces neuronal cell death through a pathway involving glycogen synthase kinase 3. Biochem J 2003; 372:129-36. [PMID: 12578563 PMCID: PMC1223368 DOI: 10.1042/bj20021596] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2002] [Revised: 01/10/2003] [Accepted: 02/11/2003] [Indexed: 11/17/2022]
Abstract
Prion diseases are characterized by neuronal cell death, glial proliferation and deposition of prion peptide aggregates. An abnormal misfolded isoform of the prion protein (PrP) is considered to be responsible for this neurodegeneration. The PrP 106-126, a synthetic peptide obtained from the amyloidogenic region of the PrP, constitutes a model system to study prion-induced neurodegeneration as it retains the ability to trigger cell death in neuronal cultures. In the present study, we show that the addition of this prion peptide to cultured neurons increases the activity of glycogen synthase kinase 3 (GSK-3), which is accompanied by the enhanced phosphorylation of some microtubule-associated proteins including tau and microtubule-associated protein 2. Prion peptide-treated neurons become progressively atrophic, and die ultimately. Both lithium and insulin, which inhibit GSK-3 activity, significantly decrease prion peptide-induced cell death both in primary neuronal cultures and in neuroblastoma cells. Finally, the overexpression of a dominant-negative mutant of GSK-3 in transfected neuroblastoma cells efficiently prevents prion peptide-induced cell death. These results are consistent with the view that the activation of GSK-3 is a crucial mediator of prion peptide-induced neurodegeneration.
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Affiliation(s)
- Mar Pérez
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Universidad Autónoma Madrid, 28049 Madrid, Spain
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Cheng C, Xu J, Ye X, Dai J, Wu Q, Zeng L, Wang L, Zhao W, Ji C, Gu S, Xie Y, Mao Y. Cloning, expression and characterization of a novel human VMP gene. Mol Biol Rep 2002; 29:281-6. [PMID: 12463420 DOI: 10.1023/a:1020402410522] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
We report here cloning and characterization of a novel human gene, termed VMP, which is a vesicular membrane protein. RT-PCR analysis shows that VMP is expressed exclusively in brain of the 16 tissues examined, suggesting that it is a neuron-specific membrane protein. The cDNA encodes 195 amino acid with a putative molecular weight of about 24 KDa. VMP contains two putative membrane spanning domains and a hydrophilic tail homologous to the microtubule-binding domain of MAPs. So it is speculated that VMP may associated with microtubules through its C-terminal and plays an important role in vesicular organelles transport and nerve signals.
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