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Gritsenko PG, Atlasy N, Dieteren CEJ, Navis AC, Venhuizen JH, Veelken C, Schubert D, Acker-Palmer A, Westerman BA, Wurdinger T, Leenders W, Wesseling P, Stunnenberg HG, Friedl P. p120-catenin-dependent collective brain infiltration by glioma cell networks. Nat Cell Biol 2020; 22:97-107. [PMID: 31907411 PMCID: PMC6952556 DOI: 10.1038/s41556-019-0443-x] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 11/26/2019] [Indexed: 12/23/2022]
Abstract
Diffuse brain infiltration by glioma cells causes detrimental disease progression, but its multicellular coordination is poorly understood. We show here that glioma cells infiltrate the brain collectively as multicellular networks. Contacts between moving glioma cells are adaptive epithelial-like or filamentous junctions stabilized by N-cadherin, β-catenin and p120-catenin, which undergo kinetic turnover, transmit intercellular calcium transients and mediate directional persistence. Downregulation of p120-catenin compromises cell-cell interaction and communication, disrupts collective networks, and both the cadherin and RhoA binding domains of p120-catenin are required for network formation and migration. Deregulating p120-catenin further prevents diffuse glioma cell infiltration of the mouse brain with marginalized microlesions as the outcome. Transcriptomics analysis has identified p120-catenin as an upstream regulator of neurogenesis and cell cycle pathways and a predictor of poor clinical outcome in glioma patients. Collective glioma networks infiltrating the brain thus depend on adherens junctions dynamics, the targeting of which may offer an unanticipated strategy to halt glioma progression.
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Affiliation(s)
- Pavlo G Gritsenko
- Department of Cell Biology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Nader Atlasy
- Department of Molecular Biology, Radboud University, Nijmegen, The Netherlands
- Center for Molecular Medicine, University Medical Center, Utrecht, The Netherlands
| | - Cindy E J Dieteren
- Department of Cell Biology, Radboud University Medical Center, Nijmegen, The Netherlands
- Protinhi Therapeutics, Nijmegen, The Netherlands
| | - Anna C Navis
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Jan-Hendrik Venhuizen
- Department of Cell Biology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Cornelia Veelken
- Department of Cell Biology, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Dirk Schubert
- Cognitive Neuroscience Department, Donders Institute, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Amparo Acker-Palmer
- Institute of Cell Biology and Neuroscience and BMLS, Goethe University Frankfurt, Frankfurt, Germany
- Max Planck Institute for Brain Research, Frankfurt, Germany
| | - Bart A Westerman
- Department of Neurosurgery, VU University Medical Center, Amsterdam, The Netherlands
| | - Thomas Wurdinger
- Department of Neurosurgery, VU University Medical Center, Amsterdam, The Netherlands
| | - William Leenders
- Department of Biochemistry, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Pieter Wesseling
- Department of Pathology, Amsterdam University Medical Centers/VUmc and Brain Tumor Center Amsterdam, Amsterdam, The Netherlands
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Hendrik G Stunnenberg
- Department of Molecular Biology, Radboud University, Nijmegen, The Netherlands
- Princess Máxima Center for Pediatric Oncology, Utrecht, The Netherlands
| | - Peter Friedl
- Department of Cell Biology, Radboud University Medical Center, Nijmegen, The Netherlands.
- The University of Texas MD Anderson Cancer Center, Houston, TX, USA.
- Cancer Genomics Center, Utrecht, The Netherlands.
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52
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Gonzalez-Fernandez C, González P, Rodríguez FJ. New insights into Wnt signaling alterations in amyotrophic lateral sclerosis: a potential therapeutic target? Neural Regen Res 2020; 15:1580-1589. [PMID: 32209757 PMCID: PMC7437582 DOI: 10.4103/1673-5374.276320] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Amyotrophic lateral sclerosis is a fatal neurodegenerative disorder characterized by upper and lower motor neuron degeneration, which leads to progressive paralysis of skeletal muscles and, ultimately, respiratory failure between 2–5 years after symptom onset. Unfortunately, currently accepted treatments for amyotrophic lateral sclerosis are extremely scarce and only provide modest benefit. As a consequence, a great effort is being done by the scientific community in order to achieve a better understanding of the different molecular and cellular processes that influence the progression and/or outcome of this neuropathological condition and, therefore, unravel new potential targets for therapeutic intervention. Interestingly, a growing number of experimental evidences have recently shown that, besides its well-known physiological roles in the developing and adult central nervous system, the Wnt family of proteins is involved in different neuropathological conditions, including amyotrophic lateral sclerosis. These proteins are able to modulate, at least, three different signaling pathways, usually known as canonical (β-catenin dependent) and non-canonical (β-catenin independent) signaling pathways. In the present review, we aim to provide a general overview of the current knowledge that supports the relationship between the Wnt family of proteins and its associated signaling pathways and amyotrophic lateral sclerosis pathology, as well as their possible mechanisms of action. Altogether, the currently available knowledge suggests that Wnt signaling modulation might be a promising therapeutic approach to ameliorate the histopathological and functional deficits associated to amyotrophic lateral sclerosis, and thus improve the progression and outcome of this neuropathology.
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Affiliation(s)
| | - Pau González
- Laboratory of Molecular Neurology, Hospital Nacional de Parapléjicos (HNP), Toledo, Spain
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Wickham RJ, Alexander JM, Eden LW, Valencia-Yang M, Llamas J, Aubrey JR, Jacob MH. Learning impairments and molecular changes in the brain caused by β-catenin loss. Hum Mol Genet 2019; 28:2965-2975. [PMID: 31131404 PMCID: PMC6736100 DOI: 10.1093/hmg/ddz115] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 05/20/2019] [Accepted: 05/22/2019] [Indexed: 12/31/2022] Open
Abstract
Intellectual disability (ID), defined as IQ<70, occurs in 2.5% of individuals. Elucidating the underlying molecular mechanisms is essential for developing therapeutic strategies. Several of the identified genes that link to ID in humans are predicted to cause malfunction of β-catenin pathways, including mutations in CTNNB1 (β-catenin) itself. To identify pathological changes caused by β-catenin loss in the brain, we have generated a new β-catenin conditional knockout mouse (β-cat cKO) with targeted depletion of β-catenin in forebrain neurons during the period of major synaptogenesis, a critical window for brain development and function. Compared with control littermates, β-cat cKO mice display severe cognitive impairments. We tested for changes in two β-catenin pathways essential for normal brain function, cadherin-based synaptic adhesion complexes and canonical Wnt (Wingless-related integration site) signal transduction. Relative to control littermates, β-cat cKOs exhibit reduced levels of key synaptic adhesion and scaffold binding partners of β-catenin, including N-cadherin, α-N-catenin, p120ctn and S-SCAM/Magi2. Unexpectedly, the expression levels of several canonical Wnt target genes were not altered in β-cat cKOs. This lack of change led us to find that β-catenin loss leads to upregulation of γ-catenin (plakoglobin), a partial functional homolog, whose neural-specific role is poorly defined. We show that γ-catenin interacts with several β-catenin binding partners in neurons but is not able to fully substitute for β-catenin loss, likely due to differences in the N-and C-termini between the catenins. Our findings identify severe learning impairments, upregulation of γ-catenin and reductions in synaptic adhesion and scaffold proteins as major consequences of β-catenin loss.
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Affiliation(s)
- Robert J Wickham
- Department of Neuroscience, Sackler Biomedical Graduate School, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Jonathan M Alexander
- Department of Neuroscience, Sackler Biomedical Graduate School, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Lillian W Eden
- Department of Neuroscience, Sackler Biomedical Graduate School, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Mabel Valencia-Yang
- Department of Neuroscience, Sackler Biomedical Graduate School, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Josué Llamas
- Department of Neuroscience, Sackler Biomedical Graduate School, Tufts University School of Medicine, Boston, MA 02111, USA
| | - John R Aubrey
- Department of Neuroscience, Sackler Biomedical Graduate School, Tufts University School of Medicine, Boston, MA 02111, USA
| | - Michele H Jacob
- Department of Neuroscience, Sackler Biomedical Graduate School, Tufts University School of Medicine, Boston, MA 02111, USA
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54
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Meng S, Zhou H, Feng Z, Xu Z, Tang Y, Wu M. Epigenetics in Neurodevelopment: Emerging Role of Circular RNA. Front Cell Neurosci 2019; 13:327. [PMID: 31379511 PMCID: PMC6658887 DOI: 10.3389/fncel.2019.00327] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2019] [Accepted: 07/03/2019] [Indexed: 01/16/2023] Open
Abstract
Canonical epigenetic modifications, including DNA methylation, histone modification and chromatin remodeling, play a role in numerous life processes, particularly neurodevelopment. Epigenetics explains the development of cells in an organism with the same DNA sequence into different cell types with various functions. However, previous studies on epigenetics have only focused on the chromatin level. Recently, epigenetic modifications of RNA, which mainly include 6-methyladenosine (m6A), pseudouridine, 5-methylcytidine (m5C), inosine (I), 2′-O-ribosemethylation, and 1-methyladenosine (m1A), have gained increasing attention. Circular RNAs (circRNAs), which are a type of non-coding RNA without a 5′ cap or 3′ poly (A) tail, are abundantly found in the brain and might respond to and regulate synaptic function. Also, circRNAs have various functions, such as microRNA sponge, regulation of gene transcription and interaction with RNA binding protein. In addition, circRNAs are methylated by N6-methyladenosine (m6A). In this review, we discuss the crucial roles of epigenetic modifications of circRNAs, such as m6A, in the genesis and development of neurons and in synaptic function and plasticity. Thus, this type of changes in circRNAs might be a therapeutic target in central nervous system (CNS) disorders and could aid the diagnosis and treatment of these disorders.
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Affiliation(s)
- Shujuan Meng
- Hunan Provincial Tumor Hospital, The Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis, Ministry of Health, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China
| | - Hecheng Zhou
- Hunan Provincial Tumor Hospital, The Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis, Ministry of Health, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China
| | - Ziyang Feng
- Hunan Provincial Tumor Hospital, The Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis, Ministry of Health, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China
| | - Zihao Xu
- Hunan Provincial Tumor Hospital, The Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis, Ministry of Health, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China
| | - Ying Tang
- Hunan Provincial Tumor Hospital, The Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis, Ministry of Health, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China
| | - Minghua Wu
- Hunan Provincial Tumor Hospital, The Affiliated Tumor Hospital of Xiangya Medical School, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China.,Key Laboratory of Carcinogenesis, Ministry of Health, Cancer Research Institute, School of Basic Medical Science, Central South University, Changsha, China
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55
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Field MG, Kuznetsov JN, Bussies PL, Cai LZ, Alawa KA, Decatur CL, Kurtenbach S, Harbour JW. BAP1 Loss Is Associated with DNA Methylomic Repatterning in Highly Aggressive Class 2 Uveal Melanomas. Clin Cancer Res 2019; 25:5663-5673. [PMID: 31285370 DOI: 10.1158/1078-0432.ccr-19-0366] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Revised: 04/23/2019] [Accepted: 06/25/2019] [Indexed: 12/17/2022]
Abstract
PURPOSE The strong association between BAP1 mutations and metastasizing Class 2 uveal melanoma (UM) suggests that epigenetic alterations may play a significant role in tumor progression. Thus, we characterized the impact of BAP1 loss on the DNA methylome in UM.Experimental Design: Global DNA methylation was analyzed in 47 Class 1 and 45 Class 2 primary UMs and in UM cells engineered to inducibly deplete BAP1. RNA-Seq was analyzed in 80 UM samples and engineered UM cells. RESULTS Hypermethylation on chromosome 3 correlated with downregulated gene expression at several loci, including 3p21, where BAP1 is located. Gene set analysis of hypermethylated and downregulated genes identified axon guidance and melanogenesis as deregulated pathways, with several of these genes located on chromosome 3. A novel hypermethylated site within the BAP1 locus was found in all Class 2 tumors, suggesting that BAP1 itself is epigenetically regulated. Highly differentially methylated probes were orthogonally validated using bisulfite sequencing, and they successfully distinguished Class 1 and Class 2 tumors in 100% of cases. In functional validation experiments, BAP1 knockdown in UM cells induced methylomic repatterning similar to UM tumors, enriched for genes involved in axon guidance, melanogenesis, and development. CONCLUSIONS This study, coupled with previous work, suggests that the initial event in the divergence of Class 2 UM from Class 1 UM is loss of one copy of chromosome 3, followed by mutation of BAP1 on the remaining copy of chromosome 3, leading to the methylomic repatterning profile characteristic of Class 2 UMs.
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Affiliation(s)
- Matthew G Field
- Bascom Palmer Eye Institute, Sylvester Comprehensive Cancer Center and Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, Florida
| | - Jeffim N Kuznetsov
- Bascom Palmer Eye Institute, Sylvester Comprehensive Cancer Center and Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, Florida
| | - Parker L Bussies
- Bascom Palmer Eye Institute, Sylvester Comprehensive Cancer Center and Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, Florida
| | - Louie Z Cai
- Bascom Palmer Eye Institute, Sylvester Comprehensive Cancer Center and Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, Florida
| | - Karam A Alawa
- Bascom Palmer Eye Institute, Sylvester Comprehensive Cancer Center and Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, Florida
| | - Christina L Decatur
- Bascom Palmer Eye Institute, Sylvester Comprehensive Cancer Center and Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, Florida
| | - Stefan Kurtenbach
- Bascom Palmer Eye Institute, Sylvester Comprehensive Cancer Center and Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, Florida
| | - J William Harbour
- Bascom Palmer Eye Institute, Sylvester Comprehensive Cancer Center and Interdisciplinary Stem Cell Institute, University of Miami Miller School of Medicine, Miami, Florida.
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56
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Grković I, Drakulić D, Martinović J, Mitrović N. Role of Ectonucleotidases in Synapse Formation During Brain Development: Physiological and Pathological Implications. Curr Neuropharmacol 2019; 17:84-98. [PMID: 28521702 PMCID: PMC6341498 DOI: 10.2174/1570159x15666170518151541] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Revised: 04/19/2017] [Accepted: 05/16/2017] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Extracellular adenine nucleotides and nucleosides, such as ATP and adenosine, are among the most recently identified and least investigated diffusible signaling factors that contribute to the structural and functional remodeling of the brain, both during embryonic and postnatal development. Their levels in the extracellular milieu are tightly controlled by various ectonucleotidases: ecto-nucleotide pyrophosphatase/phosphodiesterases (E-NPP), alkaline phosphatases (AP), ecto-nucleoside triphosphate diphosphohydrolases (E-NTPDases) and ecto-5'- nucleotidase (eN). METHODS Studies related to the expression patterns of ectonucleotidases and their known features during brain development are reviewed, highlighting involvement of these enzymes in synapse formation and maturation in physiological as well as in pathological states. RESULTS During brain development and in adulthood all ectonucleotidases have diverse expression pattern, cell specific localization and function. NPPs are expressed at early embryonic days, but the expression of NPP3 is reduced and restricted to ependymal area in adult brain. NTPDase2 is dominant ectonucleotidase existing in the progenitor cells as well as main astrocytic NTPDase in the adult brain, while NTPDase3 is fully expressed after third postnatal week, almost exclusively on varicose fibers. Specific brain AP is functionally associated with synapse formation and this enzyme is sufficient for adenosine production during neurite growth and peak of synaptogenesis. eN is transiently associated with synapses during synaptogenesis, however in adult brain it is more glial than neuronal enzyme. CONCLUSION Control of extracellular adenine nucleotide levels by ectonucleotidases are important for understanding the role of purinergic signaling in developing tissues and potential targets in developmental disorders such as autism.
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Affiliation(s)
- Ivana Grković
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Dunja Drakulić
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Jelena Martinović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
| | - Nataša Mitrović
- Department of Molecular Biology and Endocrinology, VINČA Institute of Nuclear Sciences, University of Belgrade, Mike Petrovića Alasa 12-14, 11001 Belgrade, Serbia
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57
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Khangura RK, Sharma J, Bali A, Singh N, Jaggi AS. An integrated review on new targets in the treatment of neuropathic pain. THE KOREAN JOURNAL OF PHYSIOLOGY & PHARMACOLOGY : OFFICIAL JOURNAL OF THE KOREAN PHYSIOLOGICAL SOCIETY AND THE KOREAN SOCIETY OF PHARMACOLOGY 2019; 23:1-20. [PMID: 30627005 PMCID: PMC6315088 DOI: 10.4196/kjpp.2019.23.1.1] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 09/12/2018] [Accepted: 09/17/2018] [Indexed: 01/01/2023]
Abstract
Neuropathic pain is a complex chronic pain state caused by the dysfunction of somatosensory nervous system, and it affects the millions of people worldwide. At present, there are very few medical treatments available for neuropathic pain management and the intolerable side effects of medications may further worsen the symptoms. Despite the presence of profound knowledge that delineates the pathophysiology and mechanisms leading to neuropathic pain, the unmet clinical needs demand more research in this field that would ultimately assist to ameliorate the pain conditions. Efforts are being made globally to explore and understand the basic molecular mechanisms responsible for somatosensory dysfunction in preclinical pain models. The present review highlights some of the novel molecular targets like D-amino acid oxidase, endoplasmic reticulum stress receptors, sigma receptors, hyperpolarization-activated cyclic nucleotide-gated cation channels, histone deacetylase, Wnt/β-catenin and Wnt/Ryk, ephrins and Eph receptor tyrosine kinase, Cdh-1 and mitochondrial ATPase that are implicated in the induction of neuropathic pain. Studies conducted on the different animal models and observed results have been summarized with an aim to facilitate the efforts made in the drug discovery. The diligent analysis and exploitation of these targets may help in the identification of some promising therapies that can better manage neuropathic pain and improve the health of patients.
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Affiliation(s)
- Ravneet Kaur Khangura
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India
| | - Jasmine Sharma
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India
| | - Anjana Bali
- Akal College of Pharmacy and Technical Education, Mastuana Sahib 148002, Sangrur, India
| | - Nirmal Singh
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India
| | - Amteshwar Singh Jaggi
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala 147002, India
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58
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Kuznitsov-Yanovsky L, Mayshar Y, Ben-Yosef D. Modeling FXS: Human Pluripotent Stem Cells and In Vitro Neural Differentiation. Methods Mol Biol 2019; 1942:89-100. [PMID: 30900178 DOI: 10.1007/978-1-4939-9080-1_8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
In fragile X syndrome (FXS) embryos FMRP is widely expressed during early stages of embryogenesis however it is inactivated by the end of the first trimester. In the same manner, human embryonic stem cell (hESC) lines from FXS blastocysts, bearing the full CGG expansion mutation, express FMRP in their pluripotent stage and in neurons derived following in vitro differentiation, FMR1 is completely silenced. Therefore, in vitro neural differentiation of FX-hESC lines serves as a uniquely valuable model system to study the developmental mechanisms underlying FXS, together with the proper differentiation protocol to mimic the neurodevelopmental process occurs in vivo.
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Affiliation(s)
- Liron Kuznitsov-Yanovsky
- Wolfe PGD Stem Cell Lab, Racine IVF Unit at Lis Maternity Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Department of Cell and Developmental Biology, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Yoav Mayshar
- Wolfe PGD Stem Cell Lab, Racine IVF Unit at Lis Maternity Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv University, Tel Aviv, Israel
| | - Dalit Ben-Yosef
- Wolfe PGD Stem Cell Lab, Racine IVF Unit at Lis Maternity Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv University, Tel Aviv, Israel.
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Wnt/β-Catenin Signaling Pathway Governs a Full Program for Dopaminergic Neuron Survival, Neurorescue and Regeneration in the MPTP Mouse Model of Parkinson's Disease. Int J Mol Sci 2018; 19:ijms19123743. [PMID: 30477246 PMCID: PMC6321180 DOI: 10.3390/ijms19123743] [Citation(s) in RCA: 73] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/12/2018] [Accepted: 11/17/2018] [Indexed: 12/18/2022] Open
Abstract
Wingless-type mouse mammary tumor virus (MMTV) integration site (Wnt) signaling is one of the most critical pathways in developing and adult tissues. In the brain, Wnt signaling contributes to different neurodevelopmental aspects ranging from differentiation to axonal extension, synapse formation, neurogenesis, and neuroprotection. Canonical Wnt signaling is mediated mainly by the multifunctional β-catenin protein which is a potent co-activator of transcription factors such as lymphoid enhancer factor (LEF) and T-cell factor (TCF). Accumulating evidence points to dysregulation of Wnt/β-catenin signaling in major neurodegenerative disorders. This review highlights a Wnt/β-catenin/glial connection in Parkinson's disease (PD), the most common movement disorder characterized by the selective death of midbrain dopaminergic (mDAergic) neuronal cell bodies in the subtantia nigra pars compacta (SNpc) and gliosis. Major findings of the last decade document that Wnt/β-catenin signaling in partnership with glial cells is critically involved in each step and at every level in the regulation of nigrostriatal DAergic neuronal health, protection, and regeneration in the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) mouse model of PD, focusing on Wnt/β-catenin signaling to boost a full neurorestorative program in PD.
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60
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Buechler J, Salinas PC. Deficient Wnt Signaling and Synaptic Vulnerability in Alzheimer's Disease: Emerging Roles for the LRP6 Receptor. Front Synaptic Neurosci 2018; 10:38. [PMID: 30425633 PMCID: PMC6218458 DOI: 10.3389/fnsyn.2018.00038] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Accepted: 10/10/2018] [Indexed: 12/11/2022] Open
Abstract
Synapse dysfunction and loss represent critical early events in the pathophysiology of Alzheimer’s disease (AD). While extensive research has elucidated the direct synaptotoxic effects of Amyloid-β (Aβ) oligomers, less is known about how signaling pathways at the synapse are affected by Aβ. A better understanding of the cellular and molecular mechanisms underlying synaptic vulnerability in AD is key to illuminating the determinants of AD susceptibility and will unveil novel therapeutic avenues. Canonical Wnt signaling through the Wnt co-receptor LRP6 has a critical role in maintaining the structural and functional integrity of synaptic connections in the adult brain. Accumulating evidence suggests that deficient Wnt signaling may contribute to AD pathology. In particular, LRP6 deficiency compromises synaptic function and stability, and contributes to Aß production and plaque formation. Here, we review the role of Wnt signaling for synaptic maintenance in the adult brain and the contribution of aberrant Wnt signaling to synaptic degeneration in AD. We place a focus on emerging evidence implicating the LRP6 receptor as an important modulator of AD risk and pathology.
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Affiliation(s)
- Johanna Buechler
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
| | - Patricia C Salinas
- Department of Cell and Developmental Biology, University College London, London, United Kingdom
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61
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Huang Y, Huang S, Di Scala C, Wang Q, Wandall HH, Fantini J, Zhang YQ. The glycosphingolipid MacCer promotes synaptic bouton formation in Drosophila by interacting with Wnt. eLife 2018; 7:38183. [PMID: 30355446 PMCID: PMC6202054 DOI: 10.7554/elife.38183] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Accepted: 09/09/2018] [Indexed: 01/05/2023] Open
Abstract
Lipids are structural components of cellular membranes and signaling molecules that are widely involved in development and diseases, but the underlying molecular mechanisms are poorly understood, partly because of the vast variety of lipid species and complexity of synthetic and turnover pathways. From a genetic screen, we identify that mannosyl glucosylceramide (MacCer), a species of glycosphingolipid (GSL), promotes synaptic bouton formation at the Drosophila neuromuscular junction (NMJ). Pharmacological and genetic analysis shows that the NMJ growth-promoting effect of MacCer depends on normal lipid rafts, which are known to be composed of sphingolipids, sterols and select proteins. MacCer positively regulates the synaptic level of Wnt1/Wingless (Wg) and facilitates presynaptic Wg signaling, whose activity is raft-dependent. Furthermore, a functional GSL-binding motif in Wg exhibiting a high affinity for MacCer is required for normal NMJ growth. These findings reveal a novel mechanism whereby the GSL MacCer promotes synaptic bouton formation via Wg signaling.
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Affiliation(s)
- Yan Huang
- Key Laboratory for Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, CAS Center for Excellence in Brain Science and Intelligence Technology, Beijing, China
| | - Sheng Huang
- Key Laboratory for Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, CAS Center for Excellence in Brain Science and Intelligence Technology, Beijing, China.,Sino-Danish College, Sino-Danish Center for Education and Research, Chinese Academy of Sciences, Beijing, China
| | | | - Qifu Wang
- Key Laboratory for Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, CAS Center for Excellence in Brain Science and Intelligence Technology, Beijing, China
| | - Hans H Wandall
- Copenhagen Center for Glycomics, Department of Cellular and Molecular Medicine, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jacques Fantini
- UNIS UMR_S 1072, INSERM, Aix-Marseille Université, Marseille, France
| | - Yong Q Zhang
- Key Laboratory for Molecular and Developmental Biology, Institute of Genetics and Developmental Biology, CAS Center for Excellence in Brain Science and Intelligence Technology, Beijing, China
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He CW, Liao CP, Pan CL. Wnt signalling in the development of axon, dendrites and synapses. Open Biol 2018; 8:rsob.180116. [PMID: 30282660 PMCID: PMC6223216 DOI: 10.1098/rsob.180116] [Citation(s) in RCA: 53] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 09/07/2018] [Indexed: 12/12/2022] Open
Abstract
Wnts are a highly conserved family of secreted glycoproteins that play essential roles in the morphogenesis and body patterning during the development of metazoan species. In recent years, mounting evidence has revealed important functions of Wnt signalling in diverse aspects of neural development, including neuronal polarization, guidance and branching of the axon and dendrites, as well as synapse formation and its structural remodelling. In contrast to Wnt signalling in cell proliferation and differentiation, which mostly acts through β-catenin-dependent pathways, Wnts engage a diverse array of non-transcriptional cascades in neuronal development, such as the planar cell polarity, cytoskeletal or calcium signalling pathways. In this review, we summarize recent advances in the mechanisms of Wnt signalling in the development of axon, dendrite and synapse formation.
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Affiliation(s)
- Chun-Wei He
- Institute of Molecular Medicine, National Taiwan University College of Medicine, Taipei 10002, Taiwan, Republic of China
| | - Chien-Po Liao
- Institute of Molecular Medicine, National Taiwan University College of Medicine, Taipei 10002, Taiwan, Republic of China
| | - Chun-Liang Pan
- Institute of Molecular Medicine, National Taiwan University College of Medicine, Taipei 10002, Taiwan, Republic of China
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63
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Orellana AM, Leite JA, Kinoshita PF, Vasconcelos AR, Andreotti DZ, de Sá Lima L, Xavier GF, Kawamoto EM, Scavone C. Ouabain increases neuronal branching in hippocampus and improves spatial memory. Neuropharmacology 2018; 140:260-274. [PMID: 30099050 DOI: 10.1016/j.neuropharm.2018.08.008] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Revised: 07/05/2018] [Accepted: 08/06/2018] [Indexed: 12/20/2022]
Abstract
Previous research shows Ouabain (OUA) to bind Na, K-ATPase, thereby triggering a number of signaling pathways, including the transcription factors NFᴋB and CREB. These transcription factors play a key role in the regulation of BDNF and WNT-β-catenin signaling cascades, which are involved in neuroprotection and memory regulation. This study investigated the effects of OUA (10 nM) in the modulation of the principal signaling pathways involved in morphological plasticity and memory formation in the hippocampus of adult rats. The results show intrahippocampal injection of OUA 10 nM to activate the Wnt/β-Catenin signaling pathway and to increase CREB/BDNF and NFᴋB levels. These effects contribute to important changes in the cellular microenvironment, resulting in enhanced levels of dendritic branching in hippocampal neurons, in association with an improvement in spatial reference memory and the inhibition of long-term memory extinction.
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Affiliation(s)
- Ana Maria Orellana
- Department of Pharmacology, Institute of Biomedical Science I University of São Paulo, Room 338, Av. Prof. Lineu Prestes, 1524, ICB I, Cidade Universitária, 05508-900, São Paulo, SP. Brazil.
| | - Jacqueline Alves Leite
- Department of Pharmacology, Institute of Biomedical Science I University of São Paulo, Room 338, Av. Prof. Lineu Prestes, 1524, ICB I, Cidade Universitária, 05508-900, São Paulo, SP. Brazil.
| | - Paula Fernanda Kinoshita
- Department of Pharmacology, Institute of Biomedical Science I University of São Paulo, Room 338, Av. Prof. Lineu Prestes, 1524, ICB I, Cidade Universitária, 05508-900, São Paulo, SP. Brazil.
| | - Andrea Rodrigues Vasconcelos
- Department of Pharmacology, Institute of Biomedical Science I University of São Paulo, Room 338, Av. Prof. Lineu Prestes, 1524, ICB I, Cidade Universitária, 05508-900, São Paulo, SP. Brazil.
| | - Diana Zukas Andreotti
- Department of Pharmacology, Institute of Biomedical Science I University of São Paulo, Room 338, Av. Prof. Lineu Prestes, 1524, ICB I, Cidade Universitária, 05508-900, São Paulo, SP. Brazil.
| | - Larissa de Sá Lima
- Department of Pharmacology, Institute of Biomedical Science I University of São Paulo, Room 338, Av. Prof. Lineu Prestes, 1524, ICB I, Cidade Universitária, 05508-900, São Paulo, SP. Brazil.
| | - Gilberto Fernando Xavier
- Department of Physiology, Institute of Bioscience, University of São Paulo, Adress: Rua do Matão, Travessa 14, 101, São Paulo, 05508-090, Brazil.
| | - Elisa Mitiko Kawamoto
- Department of Pharmacology, Institute of Biomedical Science I University of São Paulo, Room 338, Av. Prof. Lineu Prestes, 1524, ICB I, Cidade Universitária, 05508-900, São Paulo, SP. Brazil.
| | - Cristoforo Scavone
- Department of Pharmacology, Institute of Biomedical Science I University of São Paulo, Room 338, Av. Prof. Lineu Prestes, 1524, ICB I, Cidade Universitária, 05508-900, São Paulo, SP. Brazil.
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64
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Zhu L, Jones C. The canonical Wnt/β-catenin signaling pathway stimulates herpes simplex virus 1 productive infection. Virus Res 2018; 256:29-37. [PMID: 30077727 PMCID: PMC6261341 DOI: 10.1016/j.virusres.2018.07.020] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2018] [Revised: 07/28/2018] [Accepted: 07/30/2018] [Indexed: 01/29/2023]
Abstract
The ability of herpes simplex virus 1 (HSV-1) to replicate efficiently in differentiated cells is regulated by cellular factors that stimulate viral gene expression, cell survival, and viral morphogenesis. Activation of the canonical Wnt signaling pathway generally increases β-catenin protein levels, cell survival, and growth in dividing cells suggesting this important signaling pathway regulates productive infection. In this study, we demonstrated that a β-catenin specific small molecule inhibitor (iCRT14) reduced HSV-1 titers approximately 10-fold in primary human lung fibroblasts and Vero cells. Furthermore, β-catenin dependent transcription was increased at late times after infection and as expected iCRT14 reduced β-catenin dependent transcription. Although HSV-1 infection increased β-catenin steady state protein levels approximately 4-fold in Vero cells, there was only a nominal increase in human lung fibroblasts. We hypothesized that VP16 regulates β-catenin dependent transcription because VP16 is a viral regulatory protein expressed at late times after infection. In the absence of other viral proteins, VP16 increased β-catenin dependent transcription and β-catenin steady state protein levels. Collectively, these studies suggested the cellular transcription factor β-catenin stimulates productive infection, in part because VP16 enhances β-catenin dependent transcription.
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Affiliation(s)
- Liqian Zhu
- Oklahoma State University, Center for Veterinary Health Sciences, Department of Veterinary Pathobiology, Stillwater, OK, 74078, United States; Yangzhou University, College of Veterinary Medicine and Jiangsu Co-innovation, Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, 48 Wenhui East Road, Yangzhou, 225009, China
| | - Clinton Jones
- Oklahoma State University, Center for Veterinary Health Sciences, Department of Veterinary Pathobiology, Stillwater, OK, 74078, United States.
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65
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Vallée A, Lecarpentier Y, Guillevin R, Vallée JN. Opposite Interplay Between the Canonical WNT/β-Catenin Pathway and PPAR Gamma: A Potential Therapeutic Target in Gliomas. Neurosci Bull 2018; 34:573-588. [PMID: 29582250 PMCID: PMC5960455 DOI: 10.1007/s12264-018-0219-5] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 01/18/2018] [Indexed: 12/19/2022] Open
Abstract
In gliomas, the canonical Wingless/Int (WNT)/β-catenin pathway is increased while peroxisome proliferator-activated receptor gamma (PPAR-γ) is downregulated. The two systems act in an opposite manner. This review focuses on the interplay between WNT/β-catenin signaling and PPAR-γ and their metabolic implications as potential therapeutic target in gliomas. Activation of the WNT/β-catenin pathway stimulates the transcription of genes involved in proliferation, invasion, nucleotide synthesis, tumor growth, and angiogenesis. Activation of PPAR-γ agonists inhibits various signaling pathways such as the JAK/STAT, WNT/β-catenin, and PI3K/Akt pathways, which reduces tumor growth, cell proliferation, cell invasiveness, and angiogenesis. Nonsteroidal anti-inflammatory drugs, curcumin, antipsychotic drugs, adiponectin, and sulforaphane downregulate the WNT/β-catenin pathway through the upregulation of PPAR-γ and thus appear to provide an interesting therapeutic approach for gliomas. Temozolomide (TMZ) is an antiangiogenic agent. The downstream action of this opposite interplay may explain the TMZ-resistance often reported in gliomas.
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Affiliation(s)
- Alexandre Vallée
- Laboratory of Mathematics and Applications, Unités Mixtes de Recherche (UMR), Centre National de la Recherche Scientifique (CNRS) 7348, University of Poitiers, Poitiers, France.
- Délégation à la Recherche Clinique et à l'Innovation (DRCI), Hôpital Foch, Suresnes, France.
| | - Yves Lecarpentier
- Centre de Recherche Clinique, Grand Hôpital de l'Est Francilien, Meaux, France
| | - Rémy Guillevin
- DACTIM, UMR CNRS 7348, University of Poitiers et CHU de Poitiers, Poitiers, France
| | - Jean-Noël Vallée
- Laboratory of Mathematics and Applications, Unités Mixtes de Recherche (UMR), Centre National de la Recherche Scientifique (CNRS) 7348, University of Poitiers, Poitiers, France
- CHU Amiens Picardie, University of Picardie Jules Verne, Amiens, France
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66
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Janouschek H, Eickhoff CR, Mühleisen TW, Eickhoff SB, Nickl-Jockschat T. Using coordinate-based meta-analyses to explore structural imaging genetics. Brain Struct Funct 2018; 223:3045-3061. [PMID: 29730826 DOI: 10.1007/s00429-018-1670-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Accepted: 04/19/2018] [Indexed: 12/29/2022]
Abstract
Imaging genetics has become a highly popular approach in the field of schizophrenia research. A frequently reported finding is that effects from common genetic variation are associated with a schizophrenia-related structural endophenotype. Genetic contributions to a structural endophenotype may be easier to delineate, when referring to biological rather than diagnostic criteria. We used coordinate-based meta-analyses, namely the anatomical likelihood estimation (ALE) algorithm on 30 schizophrenia-related imaging genetics studies, representing 44 single-nucleotide polymorphisms at 26 gene loci investigated in 4682 subjects. To test whether analyses based on biological information would improve the convergence of results, gene ontology (GO) terms were used to group the findings from the published studies. We did not find any significant results for the main contrast. However, our analysis enrolling studies on genotype × diagnosis interaction yielded two clusters in the left temporal lobe and the medial orbitofrontal cortex. All other subanalyses did not yield any significant results. To gain insight into possible biological relationships between the genes implicated by these clusters, we mapped five of them to GO terms of the category "biological process" (AKT1, CNNM2, DISC1, DTNBP1, VAV3), then five to "cellular component" terms (AKT1, CNNM2, DISC1, DTNBP1, VAV3), and three to "molecular function" terms (AKT1, VAV3, ZNF804A). A subsequent cluster analysis identified representative, non-redundant subsets of semantically similar terms that aided a further interpretation. We regard this approach as a new option to systematically explore the richness of the literature in imaging genetics.
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Affiliation(s)
- Hildegard Janouschek
- Department of Neurology, RWTH Aachen University, Aachen, Germany.,Department of Psychiatry, Iowa Neuroscience Institute, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Claudia R Eickhoff
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen, Germany.,Institute of Clinical Neuroscience and Medical Psychology, Medical Faculty, Heinrich Heine University, Düsseldorf, Germany.,Institute of Neuroscience and Medicine (Functional Architecture of the Brain; INM-1), Forschungszentrum Jülich GmbH, Jülich, Germany
| | - Thomas W Mühleisen
- Institute of Neuroscience und Medicine (INM-1), Research Centre Jülich, Jülich, Germany.,Department of Biomedicine, University of Basel, Basel, Switzerland
| | - Simon B Eickhoff
- Institute of Systems Neuroscience, Medical Faculty, Heinrich Heine University Düsseldorf, Düsseldorf, Germany.,Institute of Neuroscience and Medicine, Brain & Behaviour (INM-7), Research Centre Jülich, Jülich, Germany
| | - Thomas Nickl-Jockschat
- Department of Psychiatry, Psychotherapy and Psychosomatics, RWTH Aachen University, Aachen, Germany. .,Jülich-Aachen Research Alliance Brain, Jülich/Aachen, Germany. .,Department of Psychiatry, Iowa Neuroscience Institute, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
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67
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Vallée A. [Aerobic glycolysis activation through canonical WNT/β-catenin pathway in ALS]. Med Sci (Paris) 2018; 34:326-330. [PMID: 29658475 DOI: 10.1051/medsci/20183404013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Energy is the major determinant of neuronal viability. We focus our synthesis on the hypothesis of the development of aerobic glycolysis by the stimulation of the canonical WNT/β-catenin pathway in amyotrophic lateral sclerosis (ALS). The stimulation of the canonical WNT/β-catenin pathway induces the activation of aerobic glycolysis, also called Warburg effect, via the stimulation of glycolytic enzymes such as Glut (glucose transporter), PKM2 (pyruvate kinase M2), PDK1 (pyruvate dehydrogenase kinase 1), LDH-A (lactate dehydrogenase A) and MCT-1 (monocarboxylate transporter 1). The aerobic glycolysis consists to a supply of a large part of glucose into lactate regardless of oxygen. Aerobic glycolysis is less efficient in terms of ATP production than oxidative phosphorylation due to the shunt of the TCA cycle. Dysregulation of cellular energy metabolism promotes cell death and participates to the progression of ALS. Controlling the expression of the canonical WNT/β-catenin signaling pathway is an attractive strategy to regulate aerobic glycolysis initiation and the progression of ALS.
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Affiliation(s)
- Alexandre Vallée
- Laboratoire de mathématiques et applications (LMA), UMR CNRS 7348, CHU de Poitiers, Université de Poitiers, 2, rue de la Milèterie, 86021 Poitiers, France
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68
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Workman A, Zhu L, Keel BN, Smith TPL, Jones C. The Wnt Signaling Pathway Is Differentially Expressed during the Bovine Herpesvirus 1 Latency-Reactivation Cycle: Evidence That Two Protein Kinases Associated with Neuronal Survival, Akt3 and BMPR2, Are Expressed at Higher Levels during Latency. J Virol 2018; 92:e01937-17. [PMID: 29321317 PMCID: PMC5972910 DOI: 10.1128/jvi.01937-17] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 01/04/2018] [Indexed: 12/20/2022] Open
Abstract
Sensory neurons in trigeminal ganglia (TG) of calves latently infected with bovine herpesvirus 1 (BoHV-1) abundantly express latency-related (LR) gene products, including a protein (ORF2) and two micro-RNAs. Recent studies in mouse neuroblastoma cells (Neuro-2A) demonstrated ORF2 interacts with β-catenin and a β-catenin coactivator, high-mobility group AT-hook 1 (HMGA1) protein, which correlates with increased β-catenin-dependent transcription and cell survival. β-Catenin and HMGA1 are readily detected in a subset of latently infected TG neurons but not TG neurons from uninfected calves or reactivation from latency. Consequently, we hypothesized that the Wnt/β-catenin signaling pathway is differentially expressed during the latency and reactivation cycle and an active Wnt pathway promotes latency. RNA-sequencing studies revealed that 102 genes associated with the Wnt/β-catenin signaling pathway were differentially expressed in TG during the latency-reactivation cycle in calves. Wnt agonists were generally expressed at higher levels during latency, but these levels decreased during dexamethasone-induced reactivation. The Wnt agonist bone morphogenetic protein receptor 2 (BMPR2) was intriguing because it encodes a serine/threonine receptor kinase that promotes neuronal differentiation and inhibits cell death. Another differentially expressed gene encodes a protein kinase (Akt3), which is significant because Akt activity enhances cell survival and is linked to herpes simplex virus 1 latency and neuronal survival. Additional studies demonstrated ORF2 increased Akt3 steady-state protein levels and interacted with Akt3 in transfected Neuro-2A cells, which correlated with Akt3 activation. Conversely, expression of Wnt antagonists increased during reactivation from latency. Collectively, these studies suggest Wnt signaling cooperates with LR gene products, in particular ORF2, to promote latency.IMPORTANCE Lifelong BoHV-1 latency primarily occurs in sensory neurons. The synthetic corticosteroid dexamethasone consistently induces reactivation from latency in calves. RNA sequencing studies revealed 102 genes associated with the Wnt/β-catenin signaling pathway are differentially regulated during the latency-reactivation cycle. Two protein kinases associated with the Wnt pathway, Akt3 and BMPR2, were expressed at higher levels during latency but were repressed during reactivation. Furthermore, five genes encoding soluble Wnt antagonists and β-catenin-dependent transcription inhibitors were induced during reactivation from latency. These findings are important because Wnt, BMPR2, and Akt3 promote neurogenesis and cell survival, processes crucial for lifelong viral latency. In transfected neuroblastoma cells, a viral protein expressed during latency (ORF2) interacts with and enhances Akt3 protein kinase activity. These findings provide insight into how cellular factors associated with the Wnt signaling pathway cooperate with LR gene products to regulate the BoHV-1 latency-reactivation cycle.
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Affiliation(s)
- Aspen Workman
- United States Department of Agriculture, Agricultural Research Service, U.S. Meat Animal Research Center, Clay Center, Nebraska, USA
| | - Liqian Zhu
- Oklahoma State University Center for Veterinary Health Sciences, Department of Veterinary Pathobiology, Stillwater, Oklahoma, USA
- College of Veterinary Medicine and Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, Yangzhou University, Yangzhou, China
| | - Brittney N Keel
- United States Department of Agriculture, Agricultural Research Service, U.S. Meat Animal Research Center, Clay Center, Nebraska, USA
| | - Timothy P L Smith
- United States Department of Agriculture, Agricultural Research Service, U.S. Meat Animal Research Center, Clay Center, Nebraska, USA
| | - Clinton Jones
- Oklahoma State University Center for Veterinary Health Sciences, Department of Veterinary Pathobiology, Stillwater, Oklahoma, USA
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69
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Vallée A, Lecarpentier Y, Guillevin R, Vallée JN. Thermodynamics in Neurodegenerative Diseases: Interplay Between Canonical WNT/Beta-Catenin Pathway-PPAR Gamma, Energy Metabolism and Circadian Rhythms. Neuromolecular Med 2018; 20:174-204. [PMID: 29572723 DOI: 10.1007/s12017-018-8486-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2017] [Accepted: 03/20/2018] [Indexed: 02/06/2023]
Abstract
Entropy production rate is increased by several metabolic and thermodynamics abnormalities in neurodegenerative diseases (NDs). Irreversible processes are quantified by changes in the entropy production rate. This review is focused on the opposing interactions observed in NDs between the canonical WNT/beta-catenin pathway and PPAR gamma and their metabolic and thermodynamic implications. In amyotrophic lateral sclerosis and Huntington's disease, WNT/beta-catenin pathway is upregulated, whereas PPAR gamma is downregulated. In Alzheimer's disease and Parkinson's disease, WNT/beta-catenin pathway is downregulated while PPAR gamma is upregulated. The dysregulation of the canonical WNT/beta-catenin pathway is responsible for the modification of thermodynamics behaviors of metabolic enzymes. Upregulation of WNT/beta-catenin pathway leads to aerobic glycolysis, named Warburg effect, through activated enzymes, such as glucose transporter (Glut), pyruvate kinase M2 (PKM2), pyruvate dehydrogenase kinase 1(PDK1), monocarboxylate lactate transporter 1 (MCT-1), lactic dehydrogenase kinase-A (LDH-A) and inactivation of pyruvate dehydrogenase complex (PDH). Downregulation of WNT/beta-catenin pathway leads to oxidative stress and cell death through inactivation of Glut, PKM2, PDK1, MCT-1, LDH-A but activation of PDH. In addition, in NDs, PPAR gamma is dysregulated, whereas it contributes to the regulation of several key circadian genes. NDs show many dysregulation in the mediation of circadian clock genes and so of circadian rhythms. Thermodynamics rhythms operate far-from-equilibrium and partly regulate interactions between WNT/beta-catenin pathway and PPAR gamma. In NDs, metabolism, thermodynamics and circadian rhythms are tightly interrelated.
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Affiliation(s)
- Alexandre Vallée
- DRCI, Hôpital Foch, Suresnes, France.
- LMA (Laboratoire de Mathématiques et Applications) CNRS 7348, University of Poitiers, 11 Boulevard Marie et Pierre Curie, Poitiers, France.
| | - Yves Lecarpentier
- Centre de Recherche Clinique, Grand Hôpital de l'Est Francilien, Meaux, France
| | - Rémy Guillevin
- DACTIM, UMR CNRS 7348, Université de Poitiers et CHU de Poitiers, Poitiers, France
| | - Jean-Noël Vallée
- DRCI, Hôpital Foch, Suresnes, France
- CHU Amiens Picardie, Université Picardie Jules Verne (UPJV), Amiens, France
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Wei X, Gong J, Ma J, Zhang T, Li Y, Lan T, Guo P, Qi S. Targeting the Dvl-1/β-arrestin2/JNK3 interaction disrupts Wnt5a-JNK3 signaling and protects hippocampal CA1 neurons during cerebral ischemia reperfusion. Neuropharmacology 2018; 135:11-21. [PMID: 29510185 DOI: 10.1016/j.neuropharm.2018.03.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 02/28/2018] [Accepted: 03/02/2018] [Indexed: 12/21/2022]
Abstract
It is well known that Wnt5a activation plays a pivotal role in brain injury and β-arrestin2 induces c-Jun N-terminal kinase (JNK3) activation is involved in neuronal cell death. Nonetheless, the relationship between Wnt5a and JNK3 remains unexplored during cerebral ischemia/reperfusion (I/R). In the present study, we tested the hypothesis that Wnt5a-mediated JNK3 activation via the Wnt5a-Dvl-1-β-arrestin2-JNK3 signaling pathway was correlated with I/R brain injury. We found that cerebral I/R could enhance the assembly of the Dvl-1-β-arrestin2-JNK3 signaling module, Dvl-1 phosphorylation and JNK3 activation. Activated JNK3 could phosphorylate the transcription factor c-Jun, prompt caspase-3 activation and ultimately lead to neuronal cell death. To further explore specifically Wnt5a mediated JNK3 pathway activation in neuronal injury, we used Foxy-5 (a peptide that mimics the effects of Wnt5a) and Box5 (a Wnt5a antagonist) both in vitro and in vivo. AS-β-arrestin2 (an antisense oligonucleotide against β-arrestin2) and RRSLHL (a small peptide that competes with β-arrestin2 for binding to JNK3) were applied to confirm the positive signal transduction effect of the Dvl-1-β-arrestin2-JNK3 signaling module during cerebral I/R. Furthermore, Box5 and the RRSLHL peptide were found to play protective roles in neuronal death both in vivo global and focal cerebral I/R rat models and in vitro oxygen glucose deprivation (OGD) neural cells. In summary, our results indicate that Wnt5a-mediated JNK3 activation participates in I/R brain injury by targeting the Dvl-1-β-arrestin2/JNK3 interaction. Our results also point to the possibility that disrupting Wnt5a-JNK3 signaling pathway may provide a new approach for stroke therapy.
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Affiliation(s)
- Xuewen Wei
- Research Center for Biochemistry and Molecular Biology and Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical University, Xuzhou, 221002, PR China; Department of Laboratory Medicine, Affiliated Municipal Hospital of Xuzhou Medical University, Xuzhou, Jiangsu, 221002, China
| | - JuanJuan Gong
- Research Center for Biochemistry and Molecular Biology and Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical University, Xuzhou, 221002, PR China
| | - Juyun Ma
- Research Center for Biochemistry and Molecular Biology and Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical University, Xuzhou, 221002, PR China
| | - Taiyu Zhang
- Research Center for Biochemistry and Molecular Biology and Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical University, Xuzhou, 221002, PR China
| | - Yihang Li
- Research Center for Biochemistry and Molecular Biology and Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical University, Xuzhou, 221002, PR China
| | - Ting Lan
- School of Medical Technology, Xuzhou Medical University, Xuzhou, 221002, PR China
| | - Peng Guo
- Research Center for Biochemistry and Molecular Biology and Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical University, Xuzhou, 221002, PR China
| | - Suhua Qi
- Research Center for Biochemistry and Molecular Biology and Jiangsu Key Laboratory of Brain Disease Bioinformation, Xuzhou Medical University, Xuzhou, 221002, PR China; School of Medical Technology, Xuzhou Medical University, Xuzhou, 221002, PR China.
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L'Episcopo F, Tirolo C, Serapide MF, Caniglia S, Testa N, Leggio L, Vivarelli S, Iraci N, Pluchino S, Marchetti B. Microglia Polarization, Gene-Environment Interactions and Wnt/β-Catenin Signaling: Emerging Roles of Glia-Neuron and Glia-Stem/Neuroprogenitor Crosstalk for Dopaminergic Neurorestoration in Aged Parkinsonian Brain. Front Aging Neurosci 2018; 10:12. [PMID: 29483868 PMCID: PMC5816064 DOI: 10.3389/fnagi.2018.00012] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2017] [Accepted: 01/11/2018] [Indexed: 12/29/2022] Open
Abstract
Neuroinflammatory processes are recognized key contributory factors in Parkinson's disease (PD) physiopathology. While the causes responsible for the progressive loss of midbrain dopaminergic (mDA) neuronal cell bodies in the subtantia nigra pars compacta are poorly understood, aging, genetics, environmental toxicity, and particularly inflammation, represent prominent etiological factors in PD development. Especially, reactive astrocytes, microglial cells, and infiltrating monocyte-derived macrophages play dual beneficial/harmful effects, via a panel of pro- or anti-inflammatory cytokines, chemokines, neurotrophic and neurogenic transcription factors. Notably, with age, microglia may adopt a potent neurotoxic, pro-inflammatory “primed” (M1) phenotype when challenged with inflammatory or neurotoxic stimuli that hamper brain's own restorative potential and inhibit endogenous neurorepair mechanisms. In the last decade we have provided evidence for a major role of microglial crosstalk with astrocytes, mDA neurons and neural stem progenitor cells (NSCs) in the MPTP- (1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine-) mouse model of PD, and identified Wnt/β-catenin signaling, a pivotal morphogen for mDA neurodevelopment, neuroprotection, and neuroinflammatory modulation, as a critical actor in glia-neuron and glia-NSCs crosstalk. With age however, Wnt signaling and glia-NSC-neuron crosstalk become dysfunctional with harmful consequences for mDA neuron plasticity and repair. These findings are of importance given the deregulation of Wnt signaling in PD and the emerging link between most PD related genes, Wnt signaling and inflammation. Especially, in light of the expanding field of microRNAs and inflammatory PD-related genes as modulators of microglial-proinflammatory status, uncovering the complex molecular circuitry linking PD and neuroinflammation will permit the identification of new druggable targets for the cure of the disease. Here we summarize recent findings unveiling major microglial inflammatory and oxidative stress pathways converging in the regulation of Wnt/β-catenin signaling, and reciprocally, the ability of Wnt signaling pathways to modulate microglial activation in PD. Unraveling the key factors and conditons promoting the switch of the proinflammatory M1 microglia status into a neuroprotective and regenerative M2 phenotype will have important consequences for neuroimmune interactions and neuronal outcome under inflammatory and/or neurodegenerative conditions.
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Affiliation(s)
| | | | - Maria F Serapide
- Department of Biomedical and Biotechnological Sciences, Medical School, University of Catania, Catania, Italy
| | | | | | - Loredana Leggio
- Department of Biomedical and Biotechnological Sciences, Medical School, University of Catania, Catania, Italy
| | - Silvia Vivarelli
- Department of Biomedical and Biotechnological Sciences, Medical School, University of Catania, Catania, Italy
| | - Nunzio Iraci
- Department of Biomedical and Biotechnological Sciences, Medical School, University of Catania, Catania, Italy
| | - Stefano Pluchino
- Division of Stem Cell Neurobiology, Department of Clinical Neurosciences, Wellcome Trust-Medical Research Council Stem Cell Institute, NIHR Biomedical Research Centre, University of Cambridge, Cambridge, United Kingdom
| | - Bianca Marchetti
- Oasi ResearchInstitute-IRCCS, Troina, Italy.,Department of Biomedical and Biotechnological Sciences, Medical School, University of Catania, Catania, Italy
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González-Casacuberta I, Morén C, Juárez-Flores DL, Esteve-Codina A, Sierra C, Catalán-García M, Guitart-Mampel M, Tobías E, Milisenda JC, Pont-Sunyer C, Martí MJ, Cardellach F, Tolosa E, Artuch R, Ezquerra M, Fernández-Santiago R, Garrabou G. Transcriptional alterations in skin fibroblasts from Parkinson's disease patients with parkin mutations. Neurobiol Aging 2018; 65:206-216. [PMID: 29501959 DOI: 10.1016/j.neurobiolaging.2018.01.021] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 01/23/2018] [Accepted: 01/26/2018] [Indexed: 11/29/2022]
Abstract
Mutations in the parkin gene (PRKN) are the most common cause of autosomal-recessive juvenile Parkinson's disease (PD). PRKN encodes an E3 ubiquitin ligase that is involved in multiple regulatory functions including proteasomal-mediated protein turnover, mitochondrial function, mitophagy, and cell survival. However, the precise molecular events mediated by PRKN mutations in PRKN-associated PD (PRKN-PD) remain unknown. To elucidate the cellular impact of parkin mutations, we performed an RNA sequencing study in skin fibroblasts from PRKN-PD patients carrying different PRKN mutations (n = 4) and genetically unrelated healthy subjects (n = 4). We identified 343 differentially expressed genes in PRKN-PD fibroblasts. Gene ontology and canonical pathway analysis revealed enrichment of differentially expressed genes in processes such as cell adhesion, cell growth, and amino acid and folate metabolism among others. Our findings indicate that PRKN mutations are associated with large global gene expression changes as observed in fibroblasts from PRKN-PD patients and support the view of PD as a systemic disease affecting also non-neural peripheral tissues such as the skin.
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Affiliation(s)
- Ingrid González-Casacuberta
- Laboratory of Muscle Research and Mitochondrial Function-CELLEX, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine and Health Sciences, University of Barcelona (UB), Department of Internal Medicine-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Constanza Morén
- Laboratory of Muscle Research and Mitochondrial Function-CELLEX, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine and Health Sciences, University of Barcelona (UB), Department of Internal Medicine-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Diana-Luz Juárez-Flores
- Laboratory of Muscle Research and Mitochondrial Function-CELLEX, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine and Health Sciences, University of Barcelona (UB), Department of Internal Medicine-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Anna Esteve-Codina
- Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain
| | - Cristina Sierra
- Department of Clinical Biochemistry, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
| | - Marc Catalán-García
- Laboratory of Muscle Research and Mitochondrial Function-CELLEX, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine and Health Sciences, University of Barcelona (UB), Department of Internal Medicine-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Mariona Guitart-Mampel
- Laboratory of Muscle Research and Mitochondrial Function-CELLEX, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine and Health Sciences, University of Barcelona (UB), Department of Internal Medicine-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Ester Tobías
- Laboratory of Muscle Research and Mitochondrial Function-CELLEX, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine and Health Sciences, University of Barcelona (UB), Department of Internal Medicine-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - José César Milisenda
- Laboratory of Muscle Research and Mitochondrial Function-CELLEX, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine and Health Sciences, University of Barcelona (UB), Department of Internal Medicine-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Claustre Pont-Sunyer
- Laboratory of Parkison Disease and Other Neurodegenerative Movement Disorders: Clinical and Experimental Research-CELLEX, IDIBAPS, Faculty of Medicine and Health Sciences, UB, Department of Neurology-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain
| | - María José Martí
- Laboratory of Parkison Disease and Other Neurodegenerative Movement Disorders: Clinical and Experimental Research-CELLEX, IDIBAPS, Faculty of Medicine and Health Sciences, UB, Department of Neurology-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain
| | - Francesc Cardellach
- Laboratory of Muscle Research and Mitochondrial Function-CELLEX, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine and Health Sciences, University of Barcelona (UB), Department of Internal Medicine-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain
| | - Eduard Tolosa
- Laboratory of Parkison Disease and Other Neurodegenerative Movement Disorders: Clinical and Experimental Research-CELLEX, IDIBAPS, Faculty of Medicine and Health Sciences, UB, Department of Neurology-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain
| | - Rafael Artuch
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain; Department of Clinical Biochemistry, Institut de Recerca Sant Joan de Déu, Esplugues de Llobregat, Barcelona, Spain
| | - Mario Ezquerra
- Laboratory of Parkison Disease and Other Neurodegenerative Movement Disorders: Clinical and Experimental Research-CELLEX, IDIBAPS, Faculty of Medicine and Health Sciences, UB, Department of Neurology-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.
| | - Rubén Fernández-Santiago
- Laboratory of Parkison Disease and Other Neurodegenerative Movement Disorders: Clinical and Experimental Research-CELLEX, IDIBAPS, Faculty of Medicine and Health Sciences, UB, Department of Neurology-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Neurodegenerativas (CIBERNED), Instituto de Salud Carlos III, Madrid, Spain.
| | - Glòria Garrabou
- Laboratory of Muscle Research and Mitochondrial Function-CELLEX, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Faculty of Medicine and Health Sciences, University of Barcelona (UB), Department of Internal Medicine-Hospital Clínic of Barcelona, Barcelona, Spain; Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Instituto de Salud Carlos III, Madrid, Spain.
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73
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Transient activation of Wnt/β-catenin signaling reporter in fibrotic scar formation after compression spinal cord injury in adult mice. Biochem Biophys Res Commun 2018; 496:1302-1307. [PMID: 29410176 DOI: 10.1016/j.bbrc.2018.02.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 02/01/2018] [Indexed: 11/23/2022]
Abstract
After traumatic spinal cord injury (SCI), a scar may form with a fibrotic core (fibrotic scar) and surrounding reactive astrocytes (glial scar) at the lesion site. The scar tissue is considered a major obstacle preventing regeneration both as a physical barrier and as a source for secretion of inhibitors of axonal regeneration. Understanding the mechanism of scar formation and how to control it may lead to effective SCI therapies. Using a compression-SCI model on adult transgenic mice, we demonstrate that the canonical Wnt/β-catenin signaling reporter TOPgal (TCF/Lef1-lacZ) positive cells appeared at the lesion site by 5 days, peaked on 7 days, and diminished by 14 days post injury. Using various representative cell lineage markers, we demonstrate that, these transiently TOPgal positive cells are a group of Fibronectin(+);GFAP(-) fibroblast-like cells in the core scar region. Some of them are proliferative. These results indicate that Wnt/β-catenin signaling may play a key role in fibrotic scar formation after traumatic spinal cord injury.
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74
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Colini Baldeschi A, Pittaluga E, Andreola F, Rossi S, Cozzolino M, Nicotera G, Sferrazza G, Pierimarchi P, Serafino A. Atrial Natriuretic Peptide Acts as a Neuroprotective Agent in in Vitro Models of Parkinson's Disease via Up-regulation of the Wnt/β-Catenin Pathway. Front Aging Neurosci 2018; 10:20. [PMID: 29449807 PMCID: PMC5799264 DOI: 10.3389/fnagi.2018.00020] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 01/17/2018] [Indexed: 12/14/2022] Open
Abstract
In the last decades increasing evidence indicated a crucial role of the Wnt/β-catenin signaling in development of midbrain dopaminergic (mDA) neurons. Recently dysregulation of this pathway has been proposed as a novel pathomechanism leading to Parkinson's disease (PD) and some of the molecules participating to the signaling have been evaluated as potential therapeutic targets for PD. Atrial natriuretic peptide (ANP) is a cardiac-derived hormone having a critical role in cardiovascular homeostasis. ANP and its receptors (NPRs) are widely expressed in mammalian central nervous system (CNS) where they could be implicated in the regulation of neural development, synaptic transmission and information processing, as well as in neuroprotection. Until now, the effects of ANP in the CNS have been mainly ascribed to the binding and activation of NPRs. We have previously demonstrated that ANP affects the Wnt/β-catenin signaling in colorectal cancer cells through a Frizzled receptor-mediated mechanism. The purpose of this study was to investigate if ANP is able to exert neuroprotective effect on two in vitro models of PD, and if this effect could be related to activation of the Wnt/β-catenin signaling. As cellular models of DA neurons, we used the proliferating or RA-differentiated human neuroblastoma cell line SH-SY5Y. In both DA neuron-like cultures, ANP is able to positively affect the Wnt/β-catenin signaling, by inducing β-catenin stabilization and nuclear translocation. Importantly, activation of the Wnt pathway by ANP exerts neuroprotective effect when these two cellular systems were subjected to neurotoxic insult (6-OHDA) for mimicking the neurodegeneration of PD. Our data support the relevance of exogenous ANP as an innovative therapeutic molecule for midbrain, and more in general for brain diseases for which aberrant Wnt signaling seems to be involved.
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Affiliation(s)
| | - Eugenia Pittaluga
- Institute of Translational Pharmacology, National Research Council of Italy, Rome, Italy
| | - Federica Andreola
- Institute of Translational Pharmacology, National Research Council of Italy, Rome, Italy
| | - Simona Rossi
- Institute of Translational Pharmacology, National Research Council of Italy, Rome, Italy
| | - Mauro Cozzolino
- Institute of Translational Pharmacology, National Research Council of Italy, Rome, Italy
| | - Giuseppe Nicotera
- Institute of Translational Pharmacology, National Research Council of Italy, Rome, Italy
| | - Gianluca Sferrazza
- Institute of Translational Pharmacology, National Research Council of Italy, Rome, Italy
| | - Pasquale Pierimarchi
- Institute of Translational Pharmacology, National Research Council of Italy, Rome, Italy
| | - Annalucia Serafino
- Institute of Translational Pharmacology, National Research Council of Italy, Rome, Italy
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75
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Garcia AL, Udeh A, Kalahasty K, Hackam AS. A growing field: The regulation of axonal regeneration by Wnt signaling. Neural Regen Res 2018; 13:43-52. [PMID: 29451203 PMCID: PMC5840987 DOI: 10.4103/1673-5374.224359] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The canonical Wnt/β-catenin pathway is a highly conserved signaling cascade that plays critical roles during embryogenesis. Wnt ligands regulate axonal extension, growth cone guidance and synaptogenesis throughout the developing central nervous system (CNS). Recently, studies in mammalian and fish model systems have demonstrated that Wnt/β-catenin signaling also promotes axonal regeneration in the adult optic nerve and spinal cord after injury, raising the possibility that Wnt could be developed as a therapeutic strategy. In this review, we summarize experimental evidence that reveals novel roles for Wnt signaling in the injured CNS, and discuss possible mechanisms by which Wnt ligands could overcome molecular barriers inhibiting axonal growth to promote regeneration. A central challenge in the neuroscience field is developing therapeutic strategies that induce robust axonal regeneration. Although adult axons have the capacity to respond to axonal guidance molecules after injury, there are several major obstacles for axonal growth, including extensive neuronal death, glial scars at the injury site, and lack of axonal guidance signals. Research in rodents demonstrated that activation of Wnt/β-catenin signaling in retinal neurons and radial glia induced neuronal survival and axonal growth, but that activation within reactive glia at the injury site promoted proliferation and glial scar formation. Studies in zebrafish spinal cord injury models confirm an axonal regenerative role for Wnt/β-catenin signaling and identified the cell types responsible. Additionally, in vitro and in vivo studies demonstrated that Wnt induces axonal and neurite growth through transcription-dependent effects of its central mediator β-catenin, potentially by inducing regeneration-promoting genes. Canonical Wnt signaling may also function through transcription-independent interactions of β-catenin with cytoskeletal elements, which could stabilize growing axons and control growth cone movement. Therefore, these studies suggest that Wnt-induced pathways responsible for regulating axonal growth during embryogenesis could be repurposed to promote axonal growth after injury.
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Affiliation(s)
- Armando L Garcia
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Adanna Udeh
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Karthik Kalahasty
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
| | - Abigail S Hackam
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, FL, USA
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76
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Xie J, Zhao T, Liu Y. Sonic hedgehog regulates the pathfinding of descending serotonergic axons in hindbrain in collaboration with Wnt5a and secreted frizzled-related protein 1. Int J Dev Neurosci 2017; 66:24-32. [PMID: 29196093 DOI: 10.1016/j.ijdevneu.2017.11.006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Revised: 11/26/2017] [Accepted: 11/27/2017] [Indexed: 11/17/2022] Open
Abstract
Previous studies have demonstrated that both Wnt5a and Sonic hedgehog (Shh) are involved in regulating the pathfinding of descending serotonergic (5-HT, 5-hydroxytryptamine) axons in an opposite manner in the brainstem. Shh and Wnt signaling pathways interact to guide post-crossing commissural axons, where Shh acts as a repellent directly and shaping the Wnt gradient indirectly by regulating the gradient expression of the frizzled-related protein 1 (Sfrp1). Whether such a mechanism functions in descending 5-HT axon guidance remains unknown. Here, we found that the core components of the Shh and Wnt planar cell polarity signaling pathways are expressed in caudal 5-HT neurons, and the expression gradients of Shh, Sfrp1, and Wnt5a exist simultaneously in hindbrain. Dunn chamber assays revealed that Sfrp1 suppressed the attractive Wnt gradient. Moreover, we found that Shh overexpression led to pathfinding defects in 5-HT axon descending, and the axonal pathfinding defects could be partially rescued by administration of an Sfrp1 antagonist in vivo. Biochemical evidence showed Shh overexpression upregulated the expression of the Sfrp1 gene and interrupted Wnt5a binding to Frizzled-3. Taken together, our results indicate that Shh, Sfrp1, and Wnt5a collaborate to direct the pathfinding of descending 5-HT axons in the brainstem.
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Affiliation(s)
- Jie Xie
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu 215123, China
| | - Teng Zhao
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu 215123, China
| | - Yaobo Liu
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Institute of Neuroscience, Soochow University, Suzhou, Jiangsu 215123, China.
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77
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Matsukawa T, Morita K, Omizu S, Kato S, Koriyama Y. Mechanisms of RhoA inactivation and CDC42 and Rac1 activation during zebrafish optic nerve regeneration. Neurochem Int 2017; 112:71-80. [PMID: 29129556 DOI: 10.1016/j.neuint.2017.11.004] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 10/30/2017] [Accepted: 11/07/2017] [Indexed: 10/18/2022]
Abstract
When axons of the mammalian central nervous system (CNS) are injured, they fail to regenerate, while those of lower vertebrates undergo regeneration after injury. Wingless-type MMTV integration site family (Wnt) proteins play important roles in the CNS, and are reported to be activated after mammalian spinal cord or brain injury. Moreover, for axon growth to proceed, it is thought that small G-proteins, such as CDC42 and Rac1, need to be activated, whereas RhoA must be inactivated. However, the cell and molecular mechanisms involved in optic nerve regeneration remain unclear. In this study, we investigated axonal regeneration after injury using the zebrafish optic nerve as a model system. We sought to clarify the role of Wnt proteins and the mechanisms involved in the activation and inactivation of small G-proteins in nerve regeneration. After optic nerve injury, mRNA levels of Wnt5b, TAX1BP3 and ICAT increased in the retina, while those of Wnt10a decreased. These changes were associated with a reduction in β-catenin in nuclei. We found that Wnt5b activated CDC42 and Rac1, leading to the inactivation of RhoA, which appeared to be dependent on increased TAX1BP3 mRNA levels. Furthermore, we found that mRNA levels of Daam1a and ARHGEF16 decreased. We speculate that the decrease in β-catenin levels, which also further reduces levels of active RhoA, might contribute to regeneration in the zebrafish. Collectively, our novel results suggest that Wnt5b, Wnt10a, ICAT and TAX1BP3 participate in the activation and inactivation of small G-proteins, such as CDC42, Rac1 and RhoA, during the early stage of optic nerve regeneration in the zebrafish.
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Affiliation(s)
- Toru Matsukawa
- Faculty of Science and Engineering, Department of Life Science, Setsunan University, Neyagawa, Osaka, 572-8508, Japan.
| | - Kazune Morita
- Faculty of Science and Engineering, Department of Life Science, Setsunan University, Neyagawa, Osaka, 572-8508, Japan
| | - Shou Omizu
- Faculty of Science and Engineering, Department of Life Science, Setsunan University, Neyagawa, Osaka, 572-8508, Japan
| | - Satoru Kato
- Wellness Promotion Science Center, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, 920-0942, Japan
| | - Yoshiki Koriyama
- Graduate School and Faculty of Pharmaceutical Sciences, Suzuka University of Medical Science, Suzuka, 513-8670, Japan
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78
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Reprogramming energetic metabolism in Alzheimer's disease. Life Sci 2017; 193:141-152. [PMID: 29079469 DOI: 10.1016/j.lfs.2017.10.033] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Accepted: 10/23/2017] [Indexed: 12/20/2022]
Abstract
Entropy rate is increased by several metabolic and thermodynamics abnormalities in neurodegenerative diseases (NDs). Changes in Gibbs energy, heat production, ionic conductance or intracellular acidity are irreversibles processes which driven modifications of the entropy rate. The present review focusses on the thermodynamic implications in the reprogramming of cellular energy metabolism enabling in Alzheimer's disease (AD) through the opposite interplay of the molecular signaling pathways WNT/β-catenin and PPARγ. In AD, WNT/β-catenin pathway is downregulated while PPARγ is upregulated. Thermodynamics behaviors of metabolic enzymes are modified by dysregulation of the canonical WNT/β-catenin pathway. Downregulation of WNT/β-catenin pathway leads to oxidative stress and cell death through inactivation of glycolytic enzymes such as Glut, PKM2, PDK1, MCT-1, LDH-A but activation of PDH. In addition, in NDs, PPARγ is dysregulated whereas it contributes to the regulation of several key circadian genes. AD is considered as a dissipative structure that exchanges energy or matter with its environment far from the thermodynamic equilibrium. Far-from-equilibrium thermodynamics are notions driven by circadian rhythms. Circadian rhythms directly participate in regulating the molecular pathways WNT/β-catenin and PPARγ involved in the reprogramming of cellular energy metabolism enabling AD processes.
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79
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Palluzzi F, Ferrari R, Graziano F, Novelli V, Rossi G, Galimberti D, Rainero I, Benussi L, Nacmias B, Bruni AC, Cusi D, Salvi E, Borroni B, Grassi M. A novel network analysis approach reveals DNA damage, oxidative stress and calcium/cAMP homeostasis-associated biomarkers in frontotemporal dementia. PLoS One 2017; 12:e0185797. [PMID: 29020091 PMCID: PMC5636111 DOI: 10.1371/journal.pone.0185797] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2017] [Accepted: 09/19/2017] [Indexed: 01/04/2023] Open
Abstract
Frontotemporal Dementia (FTD) is the form of neurodegenerative dementia with the highest prevalence after Alzheimer’s disease, equally distributed in men and women. It includes several variants, generally characterized by behavioural instability and language impairments. Although few mendelian genes (MAPT, GRN, and C9orf72) have been associated to the FTD phenotype, in most cases there is only evidence of multiple risk loci with relatively small effect size. To date, there are no comprehensive studies describing FTD at molecular level, highlighting possible genetic interactions and signalling pathways at the origin FTD-associated neurodegeneration. In this study, we designed a broad FTD genetic interaction map of the Italian population, through a novel network-based approach modelled on the concepts of disease-relevance and interaction perturbation, combining Steiner tree search and Structural Equation Model (SEM) analysis. Our results show a strong connection between Calcium/cAMP metabolism, oxidative stress-induced Serine/Threonine kinases activation, and postsynaptic membrane potentiation, suggesting a possible combination of neuronal damage and loss of neuroprotection, leading to cell death. In our model, Calcium/cAMP homeostasis and energetic metabolism impairments are primary causes of loss of neuroprotection and neural cell damage, respectively. Secondly, the altered postsynaptic membrane potentiation, due to the activation of stress-induced Serine/Threonine kinases, leads to neurodegeneration. Our study investigates the molecular underpinnings of these processes, evidencing key genes and gene interactions that may account for a significant fraction of unexplained FTD aetiology. We emphasized the key molecular actors in these processes, proposing them as novel FTD biomarkers that could be crucial for further epidemiological and molecular studies.
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Affiliation(s)
- Fernando Palluzzi
- Department of Brain and Behavioural Sciences, Medical and Genomic Statistics Unit, University of Pavia, Pavia, Italy
- * E-mail:
| | - Raffaele Ferrari
- Department of Molecular Neuroscience, Institute of Neurology, University College London (UCL), London, United Kingdom
| | - Francesca Graziano
- Department of Brain and Behavioural Sciences, Medical and Genomic Statistics Unit, University of Pavia, Pavia, Italy
| | - Valeria Novelli
- Department of Genetics, Fondazione Policlinico A. Gemelli, Roma, Italy
| | - Giacomina Rossi
- Division of Neurology V and Neuropathology, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milano, Italy
| | - Daniela Galimberti
- Department of Neurological Sciences, Dino Ferrari Institute, University of Milan, Milano, Italy
| | - Innocenzo Rainero
- Department of Neuroscience, Neurology I, University of Torino and Città della Salute e della Scienza di Torino, Torino, Italy
| | - Luisa Benussi
- Molecular Markers Laboratory, IRCCS Istituto Centro San Giovanni di Dio Fatebenefratelli, Brescia, Italy
| | - Benedetta Nacmias
- Department of Neuroscience, Psychology, Drug Research and Child Health, University of Florence, Firenze, Italy
| | - Amalia C. Bruni
- Neurogenetic Regional Centre ASPCZ Lamezia Terme, Lamezia Terme (CZ), Italy
| | - Daniele Cusi
- Department of Health Sciences, University of Milan at San Paolo Hospital, Milano, Italy
- Institute of Biomedical Technologies, Italian National Research Council, Milano, Italy
| | - Erika Salvi
- Institute of Biomedical Technologies, Italian National Research Council, Milano, Italy
| | - Barbara Borroni
- Department of Medical Sciences, Neurology Clinic, University of Brescia, Brescia, Italy
| | - Mario Grassi
- Department of Brain and Behavioural Sciences, Medical and Genomic Statistics Unit, University of Pavia, Pavia, Italy
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Vallée A, Lecarpentier Y, Guillevin R, Vallée JN. Effects of cannabidiol interactions with Wnt/β-catenin pathway and PPARγ on oxidative stress and neuroinflammation in Alzheimer's disease. Acta Biochim Biophys Sin (Shanghai) 2017; 49:853-866. [PMID: 28981597 DOI: 10.1093/abbs/gmx073] [Citation(s) in RCA: 147] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 06/23/2017] [Indexed: 12/12/2022] Open
Abstract
Alzheimer's disease (AD) is a neurodegenerative disease, in which the primary etiology remains unknown. AD presents amyloid beta (Aβ) protein aggregation and neurofibrillary plaque deposits. AD shows oxidative stress and chronic inflammation. In AD, canonical Wingless-Int (Wnt)/β-catenin pathway is downregulated, whereas peroxisome proliferator-activated receptor γ (PPARγ) is increased. Downregulation of Wnt/β-catenin, through activation of glycogen synthase kinase-3β (GSK-3β) by Aβ, and inactivation of phosphatidylinositol 3-kinase/Akt signaling involve oxidative stress in AD. Cannabidiol (CBD) is a non-psychotomimetic phytocannabinoid from Cannabis sativa plant. In PC12 cells, Aβ-induced tau protein hyperphosphorylation is inhibited by CBD. This inhibition is associated with a downregulation of p-GSK-3β, an inhibitor of Wnt pathway. CBD may also increase Wnt/β-catenin by stimulation of PPARγ, inhibition of Aβ and ubiquitination of amyloid precursor protein. CBD attenuates oxidative stress and diminishes mitochondrial dysfunction and reactive oxygen species generation. CBD suppresses, through activation of PPARγ, pro-inflammatory signaling and may be a potential new candidate for AD therapy.
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Affiliation(s)
- Alexandre Vallée
- Experimental and Clinical Neurosciences Laboratory, INSERM U1084, University of Poitiers, Poitiers, France
- Laboratoire de Mathématiques et Applications (LMA), UMR CNRS 7348, Université de Poitiers, Poitiers, France
| | | | - Rémy Guillevin
- Université de Poitiers et CHU de Poitiers, DACTIM, Laboratoire de Mathématiques et Applications, UMR CNRS 7348, SP2MI, Futuroscope, France
| | - Jean-Noël Vallée
- Laboratoire de Mathématiques et Applications (LMA), UMR CNRS 7348, Université de Poitiers, Poitiers, France
- CHU Amiens Picardie, Université Picardie Jules Verne (UPJV), Amiens, France
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81
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Zhou L, Chen D, Huang XM, Long F, Cai H, Yao WX, Chen ZC, Liao ZJ, Deng ZZ, Tan S, Shan YL, Cai W, Wang YG, Yang RH, Jiang N, Peng T, Hong MF, Lu ZQ. Wnt5a Promotes Cortical Neuron Survival by Inhibiting Cell-Cycle Activation. Front Cell Neurosci 2017; 11:281. [PMID: 29033786 PMCID: PMC5626855 DOI: 10.3389/fncel.2017.00281] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2017] [Accepted: 08/30/2017] [Indexed: 01/11/2023] Open
Abstract
β-Amyloid protein (Aβ) is thought to cause neuronal loss in Alzheimer’s disease (AD). Aβ treatment promotes the re-activation of a mitotic cycle and induces rapid apoptotic death of neurons. However, the signaling pathways mediating cell-cycle activation during neuron apoptosis have not been determined. We find that Wnt5a acts as a mediator of cortical neuron survival, and Aβ42 promotes cortical neuron apoptosis by downregulating the expression of Wnt5a. Cell-cycle activation is mediated by the reduced inhibitory effect of Wnt5a in Aβ42 treated cortical neurons. Furthermore, Wnt5a signals through the non-canonical Wnt/Ca2+ pathway to suppress cyclin D1 expression and negatively regulate neuronal cell-cycle activation in a cell-autonomous manner. Together, aberrant downregulation of Wnt5a signaling is a crucial step during Aβ42 induced cortical neuron apoptosis and might contribute to AD-related neurodegeneration.
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Affiliation(s)
- Li Zhou
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.,Department of Rehabilitation, The First Affiliated Hospital of Clinical Medicine of Guangdong Pharmaceutical University, Guangzhou, China
| | - Di Chen
- Laboratory of Viral Immunology, State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Sino-French Hoffmann Institute of Immunology, Guangzhou Medical University, Guangzhou, China
| | - Xu-Ming Huang
- Department of Rehabilitation, The First Affiliated Hospital of Clinical Medicine of Guangdong Pharmaceutical University, Guangzhou, China
| | - Fei Long
- Laboratory of Viral Immunology, State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Sino-French Hoffmann Institute of Immunology, Guangzhou Medical University, Guangzhou, China
| | - Hua Cai
- Laboratory of Viral Immunology, State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Sino-French Hoffmann Institute of Immunology, Guangzhou Medical University, Guangzhou, China
| | - Wen-Xia Yao
- Laboratory of Viral Immunology, State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Sino-French Hoffmann Institute of Immunology, Guangzhou Medical University, Guangzhou, China
| | - Zhong-Cheng Chen
- Department of Laboratory, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | | | - Zhe-Zhi Deng
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Sha Tan
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yi-Long Shan
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Wei Cai
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yu-Ge Wang
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Ri-Hong Yang
- Department of Pathology, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Nan Jiang
- Department of Hepatic Surgery, Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Tao Peng
- Laboratory of Viral Immunology, State Key Laboratory of Respiratory Disease, Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, Sino-French Hoffmann Institute of Immunology, Guangzhou Medical University, Guangzhou, China
| | - Ming-Fan Hong
- Department of Neurology, The First Affiliated Hospital of Clinical Medicine of Guangdong Pharmaceutical University, Guangzhou, China
| | - Zheng-Qi Lu
- Department of Neurology, The Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
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Brafman D, Willert K. Wnt/β-catenin signaling during early vertebrate neural development. Dev Neurobiol 2017; 77:1239-1259. [PMID: 28799266 DOI: 10.1002/dneu.22517] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Revised: 07/24/2017] [Accepted: 08/09/2017] [Indexed: 12/29/2022]
Abstract
The vertebrate central nervous system (CNS) is comprised of vast number of distinct cell types arranged in a highly organized manner. This high degree of complexity is achieved by cellular communication, including direct cell-cell contact, cell-matrix interactions, and cell-growth factor signaling. Among the several developmental signals controlling the development of the CNS, Wnt proteins have emerged as particularly critical and, hence, have captivated the attention of many researchers. With Wnts' evolutionarily conserved function as primordial symmetry breaking signals, these proteins and their downstream effects are responsible for simultaneously establishing cellular diversity and tissue organization. With their expansive repertoire of secreted agonists and antagonists, cell surface receptors, signaling cascades and downstream biological effects, Wnts are ideally suited to control the complex processes underlying vertebrate neural development. In this review, we will describe the mechanisms by which Wnts exert their potent effects on cells and tissues and highlight the many roles of Wnt signaling during neural development, starting from the initial induction of the neural plate, the subsequent patterning along the embryonic axes, to the intricately organized structure of the CNS. © 2017 Wiley Periodicals, Inc. Develop Neurobiol 77: 1239-1259, 2017.
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Affiliation(s)
- David Brafman
- School of Biological and Health Systems Engineering, Arizona State University, Tempe, Arizona, 85287
| | - Karl Willert
- Department of Cellular & Molecular Medicine, University of California San Diego, La Jolla, CA, 92093-0695
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A proteomic analysis of LRRK2 binding partners reveals interactions with multiple signaling components of the WNT/PCP pathway. Mol Neurodegener 2017; 12:54. [PMID: 28697798 PMCID: PMC5505151 DOI: 10.1186/s13024-017-0193-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2016] [Accepted: 06/20/2017] [Indexed: 01/14/2023] Open
Abstract
BACKGROUND Autosomal-dominant mutations in the Park8 gene encoding Leucine-rich repeat kinase 2 (LRRK2) have been identified to cause up to 40% of the genetic forms of Parkinson's disease. However, the function and molecular pathways regulated by LRRK2 are largely unknown. It has been shown that LRRK2 serves as a scaffold during activation of WNT/β-catenin signaling via its interaction with the β-catenin destruction complex, DVL1-3 and LRP6. In this study, we examine whether LRRK2 also interacts with signaling components of the WNT/Planar Cell Polarity (WNT/PCP) pathway, which controls the maturation of substantia nigra dopaminergic neurons, the main cell type lost in Parkinson's disease patients. METHODS Co-immunoprecipitation and tandem mass spectrometry was performed in a mouse substantia nigra cell line (SN4741) and human HEK293T cell line in order to identify novel LRRK2 binding partners. Inhibition of the WNT/β-catenin reporter, TOPFlash, was used as a read-out of WNT/PCP pathway activation. The capacity of LRRK2 to regulate WNT/PCP signaling in vivo was tested in Xenopus laevis' early development. RESULTS Our proteomic analysis identified that LRRK2 interacts with proteins involved in WNT/PCP signaling such as the PDZ domain-containing protein GIPC1 and Integrin-linked kinase (ILK) in dopaminergic cells in vitro and in the mouse ventral midbrain in vivo. Moreover, co-immunoprecipitation analysis revealed that LRRK2 binds to two core components of the WNT/PCP signaling pathway, PRICKLE1 and CELSR1, as well as to FLOTILLIN-2 and CULLIN-3, which regulate WNT secretion and inhibit WNT/β-catenin signaling, respectively. We also found that PRICKLE1 and LRRK2 localize in signalosomes and act as dual regulators of WNT/PCP and β-catenin signaling. Accordingly, analysis of the function of LRRK2 in vivo, in X. laevis revelaed that LRKK2 not only inhibits WNT/β-catenin pathway, but induces a classical WNT/PCP phenotype in vivo. CONCLUSIONS Our study shows for the first time that LRRK2 activates the WNT/PCP signaling pathway through its interaction to multiple WNT/PCP components. We suggest that LRRK2 regulates the balance between WNT/β-catenin and WNT/PCP signaling, depending on the binding partners. Since this balance is crucial for homeostasis of midbrain dopaminergic neurons, we hypothesize that its alteration may contribute to the pathophysiology of Parkinson's disease.
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Cuesta S, Severin MJ, Batuecas J, Rosso SB, Pacchioni AM. Wnt/β-catenin pathway in the prefrontal cortex is required for cocaine-induced neuroadaptations. Addict Biol 2017; 22:933-945. [PMID: 26910786 DOI: 10.1111/adb.12377] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 01/19/2016] [Accepted: 01/20/2016] [Indexed: 12/21/2022]
Abstract
Behavioral sensitization is a progressive and enduring enhancement of the motor stimulant effects elicited by repeated administration of drugs of abuse. It can be divided into two distinct temporal and anatomical domains, termed initiation and expression, which are characterized by specific molecular and neurochemical changes. This study examines the role of the Wnt canonical pathway mediating the induction of cocaine sensitization. We found that β-catenin levels in the prefrontal cortex (PFC), amygdala (Amyg) and dorsal striatum (CPu) are decreased in animals that show sensitization. Accordingly, GSK3β activity levels are increased in the same areas. Moreover, β-catenin levels in nuclear fraction, mRNA expression of Axin2 and Wnt7b are decreased in the PFC of sensitized animals. Then, in order to demonstrate that changes in the PFC are crucial for initiation of sensitization, we either rescue β-catenin levels with a systemic treatment of a GSK3β inhibitor (Lithium Chloride) or inhibit Wnt/β-catenin pathway with an intracerebral infusion of Sulindac before each cocaine injection. As expected, rescuing β-catenin levels in the PFC as well as CPu and Amyg blocks cocaine-induced sensitization, while decreasing β-catenin levels exclusively in the PFC exacerbates it. Therefore, our results demonstrate a new role for the Wnt/β-catenin pathway as a required neuroadaptation in inducing behavioral sensitization.
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Affiliation(s)
- Santiago Cuesta
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
- Douglas Mental Health University Institute; Canada
- Área Toxicología, Departamento de Ciencias de los Alimentos y del Medioambiente, Facultad de Ciencias Bioquímicas y Farmacéuticas; Universidad Nacional de Rosario (U.N.R); Argentina
| | - Maria J. Severin
- Área Toxicología, Departamento de Ciencias de los Alimentos y del Medioambiente, Facultad de Ciencias Bioquímicas y Farmacéuticas; Universidad Nacional de Rosario (U.N.R); Argentina
| | - Jorgelina Batuecas
- Área Toxicología, Departamento de Ciencias de los Alimentos y del Medioambiente, Facultad de Ciencias Bioquímicas y Farmacéuticas; Universidad Nacional de Rosario (U.N.R); Argentina
| | - Silvana B. Rosso
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
- Área Toxicología, Departamento de Ciencias de los Alimentos y del Medioambiente, Facultad de Ciencias Bioquímicas y Farmacéuticas; Universidad Nacional de Rosario (U.N.R); Argentina
| | - Alejandra M. Pacchioni
- Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET); Argentina
- Área Toxicología, Departamento de Ciencias de los Alimentos y del Medioambiente, Facultad de Ciencias Bioquímicas y Farmacéuticas; Universidad Nacional de Rosario (U.N.R); Argentina
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Regulation of WNT Signaling at the Neuromuscular Junction by the Immunoglobulin Superfamily Protein RIG-3 in Caenorhabditis elegans. Genetics 2017; 206:1521-1534. [PMID: 28515212 PMCID: PMC5500148 DOI: 10.1534/genetics.116.195297] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2016] [Accepted: 05/11/2017] [Indexed: 12/17/2022] Open
Abstract
Perturbations in synaptic function could affect the normal behavior of an animal, making it important to understand the regulatory mechanisms of synaptic signaling. Previous work has shown that in Caenorhabditis elegans an immunoglobulin superfamily protein, RIG-3, functions in presynaptic neurons to maintain normal acetylcholine receptor levels at the neuromuscular junction (NMJ). In this study, we elucidate the molecular and functional mechanism of RIG-3. We demonstrate by genetic and BiFC (Bi-molecular Fluorescence Complementation) assays that presynaptic RIG-3 functions by directly interacting with the immunoglobulin domain of the nonconventional Wnt receptor, ROR receptor tyrosine kinase (RTK), CAM-1, which functions in postsynaptic body-wall muscles. This interaction in turn inhibits Wnt/LIN-44 signaling through the ROR/CAM-1 receptor, and allows for maintenance of normal acetylcholine receptor, AChR/ACR-16, levels at the neuromuscular synapse. Further, this work reveals that RIG-3 and ROR/CAM-1 function through the β-catenin/HMP-2 at the NMJ. Taken together, our results demonstrate that RIG-3 functions as an inhibitory molecule of the Wnt/LIN-44 signaling pathway through the RTK, CAM-1.
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86
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Velíšek L. Knockin' Out the Spasms. Epilepsy Curr 2017; 17:177-179. [PMID: 28684956 PMCID: PMC5486431 DOI: 10.5698/1535-7511.17.3.177] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/19/2024] Open
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87
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Potential Role for a β-Catenin Coactivator (High-Mobility Group AT-Hook 1 Protein) during the Latency-Reactivation Cycle of Bovine Herpesvirus 1. J Virol 2017; 91:JVI.02132-16. [PMID: 28003484 DOI: 10.1128/jvi.02132-16] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 12/12/2016] [Indexed: 12/25/2022] Open
Abstract
The latency-related (LR) RNA encoded by bovine herpesvirus 1 (BoHV-1) is abundantly expressed in latently infected sensory neurons. Although the LR gene encodes several products, ORF2 appears to mediate important steps during the latency-reactivation cycle because a mutant virus containing stop codons at the amino terminus of ORF2 does not reactivate from latency in calves. We recently found that the Wnt/β-catenin signaling pathway is regulated during the BoHV-1 latency-reactivation cycle (Y. Liu, M. Hancock, A. Workman, A. Doster, and C. Jones, J Virol 90:3148-3159, 2016). In the present study, a β-catenin coactivator, high-mobility group AT-hook 1 protein (HMGA1), was detected in significantly more neurons in the trigeminal ganglia of latently infected calves than in those of uninfected calves. Consequently, we hypothesized that HMGA1 cooperates with ORF2 and β-catenin to maintain latency. In support of this hypothesis, coimmunoprecipitation studies demonstrated that ORF2 stably interacts with a complex containing β-catenin and/or HMGA1 in transfected mouse neuroblastoma (Neuro-2A) cells. Confocal microscopy provided evidence that ORF2 was relocalized by HMGA1 and β-catenin in Neuro-2A cells. ORF2 consistently enhanced the ability of HMGA1 to stimulate β-catenin-dependent transcription, suggesting that interactions between ORF2 and a complex containing β-catenin and HMGA1 have functional significance. An ORF2 stop codon mutant, an ORF2 nuclear localization mutant, or a mutant lacking the 5 protein kinase A or C phosphorylation sites interfered with its ability to stimulate β-catenin-dependent transcription. Since the canonical Wnt/β-catenin signaling pathway promotes neurogenesis (synapse formation and remodeling) and inhibits neurodegeneration, interactions between ORF2, HMGA1, and β-catenin may be important for certain aspects of the latency-reactivation cycle.IMPORTANCE The lifelong latency of bovine herpesvirus 1 (BoHV-1) requires that significant numbers of infected sensory neurons survive infection and maintain normal functions. Consequently, we hypothesize that viral products expressed during latency cooperate with neuronal factors to maintain latency. Our studies revealed that a β-catenin coactivator, high-mobility group AT-hook 1 protein (HMGA1), was readily detected in a subset of trigeminal ganglion neurons in latently infected calves but not in uninfected calves. A viral protein (ORF2) expressed in latently infected neurons interacted with β-catenin and HMGA1 in transfected cells, which resulted in the nuclear localization of β-catenin. This interaction correlated with the ability of ORF2 to stimulate the coactivator functions of HMGA1. These findings are significant because the canonical Wnt/β-catenin signaling pathway promotes neurogenesis and inhibits neurodegeneration.
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Cortactin Is a Regulator of Activity-Dependent Synaptic Plasticity Controlled by Wingless. J Neurosci 2017; 37:2203-2215. [PMID: 28123080 DOI: 10.1523/jneurosci.1375-16.2017] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2016] [Revised: 12/05/2016] [Accepted: 01/17/2017] [Indexed: 01/07/2023] Open
Abstract
Major signaling molecules initially characterized as key early developmental regulators are also essential for the plasticity of the nervous system. Previously, the Wingless (Wg)/Wnt pathway was shown to underlie the structural and electrophysiological changes during activity-dependent synaptic plasticity at the Drosophila neuromuscular junction. A challenge remains to understand how this signal mediates the cellular changes underlying this plasticity. Here, we focus on the actin regulator Cortactin, a major organizer of protrusion, membrane mobility, and invasiveness, and define its new role in synaptic plasticity. We show that Cortactin is present presynaptically and postsynaptically at the Drosophila NMJ and that it is a presynaptic regulator of rapid activity-dependent modifications in synaptic structure. Furthermore, animals lacking presynaptic Cortactin show a decrease in spontaneous release frequency, and presynaptic Cortactin is necessary for the rapid potentiation of spontaneous release frequency that takes place during activity-dependent plasticity. Most interestingly, Cortactin levels increase at stimulated synaptic terminals and this increase requires neuronal activity, de novo transcription and depends on Wg/Wnt expression. Because it is not simply the presence of Cortactin in the presynaptic terminal but its increase that is necessary for the full range of activity-dependent plasticity, we conclude that it probably plays a direct and important role in the regulation of this process.SIGNIFICANCE STATEMENT In the nervous system, changes in activity that lead to modifications in synaptic structure and function are referred to as synaptic plasticity and are thought to be the basis of learning and memory. The secreted Wingless/Wnt molecule is a potent regulator of synaptic plasticity in both vertebrates and invertebrates. Understanding the molecular mechanisms that underlie these plastic changes is a major gap in our knowledge. Here, we identify a presynaptic effector molecule of the Wingless/Wnt signal, Cortactin. We show that this molecule is a potent regulator of modifications in synaptic structure and is necessary for the electrophysiological changes taking place during synaptic plasticity.
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Combined small-molecule inhibition accelerates the derivation of functional cortical neurons from human pluripotent stem cells. Nat Biotechnol 2017; 35:154-163. [PMID: 28112759 PMCID: PMC5516899 DOI: 10.1038/nbt.3777] [Citation(s) in RCA: 151] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Accepted: 12/16/2016] [Indexed: 02/06/2023]
Abstract
Considerable progress has been made in converting human pluripotent stem cells (hPSCs) into functional neurons. However, the protracted timing of human neuron specification and functional maturation remains a key challenge that hampers the routine application of hPSC-derived lineages in disease modeling and regenerative medicine. Using a combinatorial small-molecule screen, we previously identified conditions to rapidly differentiate hPSCs into peripheral sensory neurons. Here we generalize the approach to central nervous system (CNS) fates by developing a small-molecule approach for accelerated induction of early-born cortical neurons. Combinatorial application of six pathway inhibitors induces post-mitotic cortical neurons with functional electrophysiological properties by day 16 of differentiation, in the absence of glial cell co-culture. The resulting neurons, transplanted at 8 d of differentiation into the postnatal mouse cortex, are functional and establish long-distance projections, as shown using iDISCO whole-brain imaging. Accelerated differentiation into cortical neuron fates should facilitate hPSC-based strategies for disease modeling and cell therapy in CNS disorders.
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90
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Mulligan KA, Cheyette BNR. Neurodevelopmental Perspectives on Wnt Signaling in Psychiatry. MOLECULAR NEUROPSYCHIATRY 2017; 2:219-246. [PMID: 28277568 DOI: 10.1159/000453266] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Mounting evidence indicates that Wnt signaling is relevant to pathophysiology of diverse mental illnesses including schizophrenia, bipolar disorder, and autism spectrum disorder. In the 35 years since Wnt ligands were first described, animal studies have richly explored how downstream Wnt signaling pathways affect an array of neurodevelopmental processes and how their disruption can lead to both neurological and behavioral phenotypes. Recently, human induced pluripotent stem cell (hiPSC) models have begun to contribute to this literature while pushing it in increasingly translational directions. Simultaneously, large-scale human genomic studies are providing evidence that sequence variation in Wnt signal pathway genes contributes to pathogenesis in several psychiatric disorders. This article reviews neurodevelopmental and postneurodevelopmental functions of Wnt signaling, highlighting mechanisms, whereby its disruption might contribute to psychiatric illness, and then reviews the most reliable recent genetic evidence supporting that mutations in Wnt pathway genes contribute to psychiatric illness. We are proponents of the notion that studies in animal and hiPSC models informed by the human genetic data combined with the deep knowledge base and tool kits generated over the last several decades of basic neurodevelopmental research will yield near-term tangible advances in neuropsychiatry.
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Affiliation(s)
- Kimberly A Mulligan
- Department of Biological Sciences, California State University, Sacramento, CA, USA
| | - Benjamin N R Cheyette
- Department of Psychiatry, Kavli Institute for Fundamental Neuroscience, Weill Institute for Neurosciences, University of California San Francisco, San Francisco, CA, USA
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91
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Zhu L, Thunuguntla P, Liu Y, Hancock M, Jones C. The β-catenin signaling pathway stimulates bovine herpesvirus 1 productive infection. Virology 2017; 500:91-95. [PMID: 27788397 PMCID: PMC6248879 DOI: 10.1016/j.virol.2016.10.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 10/10/2016] [Accepted: 10/18/2016] [Indexed: 12/29/2022]
Abstract
Bovine herpes virus 1 (BoHV-1), an important bovine pathogen, causes conjunctivitis and disorders in the upper respiratory tract. Following acute infection, BoHV1 establishes life-long latency in sensory neurons. Recent studies demonstrated that viral gene products expressed in trigeminal ganglionic neurons during latency stabilize β-catenin levels, an important signaling molecule that interacts with a family of DNA binding proteins (T-cell factors) and subsequently stimulates transcription. In this study, we provide new evidence demonstrating that BoHV-1 transiently increased β-catenin protein levels in bovine kidney (CRIB) cells, but not in rabbit skin cells. β-catenin dependent transcription was also stimulated by infection of CRIB cells. The β-catenin small molecule inhibitor (iCRT14) significantly reduced the levels of BoHV-1 virus during productive infection of CRIB cells and rabbit skin cells. In summary, these studies suggested the ability of β-catenin to stimulate cell survival and cell cycle regulatory factors enhances productive infection in non-neuronal cells.
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Affiliation(s)
- Liqian Zhu
- Oklahoma State University Center for Veterinary Health Sciences Department of Veterinary Pathobiology Stillwater, OK 74078, USA; Yangzhou University, College of Veterinary Medicine and Jiangsu Co-innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonosis, 48 Wenhui East Road, Yangzhou 225009, China
| | - Prasanth Thunuguntla
- Oklahoma State University Center for Veterinary Health Sciences Department of Veterinary Pathobiology Stillwater, OK 74078, USA
| | - Yilin Liu
- University of Nebraska, Lincoln School of Veterinary Medicine and Biomedical Sciences Nebraska Center for Virology Morisson Life Science Center Lincoln, NE 68583-0900, USA
| | - Morgan Hancock
- University of Nebraska, Lincoln School of Veterinary Medicine and Biomedical Sciences Nebraska Center for Virology Morisson Life Science Center Lincoln, NE 68583-0900, USA
| | - Clinton Jones
- Oklahoma State University Center for Veterinary Health Sciences Department of Veterinary Pathobiology Stillwater, OK 74078, USA.
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Early Transcriptional Changes Induced by Wnt/ β-Catenin Signaling in Hippocampal Neurons. Neural Plast 2016; 2016:4672841. [PMID: 28116168 PMCID: PMC5223035 DOI: 10.1155/2016/4672841] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Revised: 10/20/2016] [Accepted: 11/27/2016] [Indexed: 01/04/2023] Open
Abstract
Wnt/β-catenin signaling modulates brain development and function and its deregulation underlies pathological changes occurring in neurodegenerative and neurodevelopmental disorders. Since one of the main effects of Wnt/β-catenin signaling is the modulation of target genes, in the present work we examined global transcriptional changes induced by short-term Wnt3a treatment (4 h) in primary cultures of rat hippocampal neurons. RNAseq experiments allowed the identification of 170 differentially expressed genes, including known Wnt/β-catenin target genes such as Notum, Axin2, and Lef1, as well as novel potential candidates Fam84a, Stk32a, and Itga9. Main biological processes enriched with differentially expressed genes included neural precursor (GO:0061364, p-adjusted = 2.5 × 10−7), forebrain development (GO:0030900, p-adjusted = 7.3 × 10−7), and stem cell differentiation (GO:0048863 p-adjusted = 7.3 × 10−7). Likewise, following activation of the signaling cascade, the expression of a significant number of genes with transcription factor activity (GO:0043565, p-adjusted = 4.1 × 10−6) was induced. We also studied molecular networks enriched upon Wnt3a activation and detected three highly significant expression modules involved in glycerolipid metabolic process (GO:0046486, p-adjusted = 4.5 × 10−19), learning or memory (GO:0007611, p-adjusted = 4.0 × 10−5), and neurotransmitter secretion (GO:0007269, p-adjusted = 5.3 × 10−12). Our results indicate that Wnt/β-catenin mediated transcription controls multiple biological processes related to neuronal structure and activity that are affected in synaptic dysfunction disorders.
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Serafino A, Sferrazza G, Colini Baldeschi A, Nicotera G, Andreola F, Pittaluga E, Pierimarchi P. Developing drugs that target the Wnt pathway: recent approaches in cancer and neurodegenerative diseases. Expert Opin Drug Discov 2016; 12:169-186. [PMID: 27960558 DOI: 10.1080/17460441.2017.1271321] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
INTRODUCTION Wnt/β-catenin signaling is an evolutionarily conserved pathway that has a crucial role in embryonic and adult life. Dysregulation of Wnt/β-catenin pathway has been associated with various diseases, including cancer and neurodegenerative disorders, including Parkinson's disease (PD). Several molecular components of the signaling have been proposed as innovative targets for cancer therapy, and very recently, some of them have been also evaluated as potential therapeutic targets for PD. Areas covered: This review focuses on the role of Wnt/β-catenin pathway in the pathogenensis of cancer and PD, examining some recent therapeutic approaches that are ongoing in preclinical and clinical studies. The possibilities that this signaling offers for diagnosis and prognosis of neoplastic diseases, and the concerns of targeting this pathway are also discussed. Expert opinion: Despite the stimulating results obtained in preclinical studies on cancer and other disease models, the clinical experience with Wnt modulators is still in its infancy, and is mainly restricted to anticancer therapy. Even with concerns of the safety of drugs targeting Wnt signaling, the attention of researchers worldwide is increasing to this issue in terms of their therapeutic potential for diseases such as PD, for which no cure exists.
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Affiliation(s)
- Annalucia Serafino
- a Institute of Translational Pharmacology , National Research Council (CNR) , Rome , Italy
| | - Gianluca Sferrazza
- a Institute of Translational Pharmacology , National Research Council (CNR) , Rome , Italy
| | | | - Giuseppe Nicotera
- a Institute of Translational Pharmacology , National Research Council (CNR) , Rome , Italy
| | - Federica Andreola
- a Institute of Translational Pharmacology , National Research Council (CNR) , Rome , Italy
| | - Eugenia Pittaluga
- a Institute of Translational Pharmacology , National Research Council (CNR) , Rome , Italy
| | - Pasquale Pierimarchi
- a Institute of Translational Pharmacology , National Research Council (CNR) , Rome , Italy
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Salehi H, Amirpour N, Niapour A, Razavi S. An Overview of Neural Differentiation Potential of Human Adipose Derived Stem Cells. Stem Cell Rev Rep 2016; 12:26-41. [PMID: 26490462 DOI: 10.1007/s12015-015-9631-7] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
There is wide interest in application of adult stem cells due to easy to obtain with a minimal patient discomfort, capable of producing cell numbers in large quantities and their immunocompatible properties without restriction by ethical concerns. Among these stem cells, multipotent mesenchymal stem cells (MSCs) from human adipose tissue are considered as an ideal source for various regenerative medicine. In spite of mesodermal origin of human adipose-derived stem cells (hADSCs), these cells have differentiation potential toward mesodermal and non-mesodermal lineages. Up to now, several studies have shown that hADSCs can undergo transdifferentiation and produce cells outside of their lineage, especially into neural cells when they are transferred to a specific cell environment. The purpose of this literature review is to provide an overview of the existing state of knowledge of the differentiation potential of hADSCs, specifically their ability to give rise to neuronal cells. The following review discusses different protocols considered for differentiation of hADSCs to neural cells, the neural markers that are used in each procedure and possible mechanisms that are involved in this differentiation.
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95
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Pirone A, Alexander J, Lau LA, Hampton D, Zayachkivsky A, Yee A, Yee A, Jacob MH, Dulla CG. APC conditional knock-out mouse is a model of infantile spasms with elevated neuronal β-catenin levels, neonatal spasms, and chronic seizures. Neurobiol Dis 2016; 98:149-157. [PMID: 27852007 DOI: 10.1016/j.nbd.2016.11.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 10/24/2016] [Accepted: 11/11/2016] [Indexed: 01/08/2023] Open
Abstract
Infantile spasms (IS) are a catastrophic childhood epilepsy syndrome characterized by flexion-extension spasms during infancy that progress to chronic seizures and cognitive deficits in later life. The molecular causes of IS are poorly defined. Genetic screens of individuals with IS have identified multiple risk genes, several of which are predicted to alter β-catenin pathways. However, evidence linking malfunction of β-catenin pathways and IS is lacking. Here, we show that conditional deletion in mice of the adenomatous polyposis coli gene (APC cKO), the major negative regulator of β-catenin, leads to excessive β-catenin levels and multiple salient features of human IS. Compared with wild-type littermates, neonatal APC cKO mice exhibit flexion-extension motor spasms and abnormal high-amplitude electroencephalographic discharges. Additionally, the frequency of excitatory postsynaptic currents is increased in layer V pyramidal cells, the major output neurons of the cerebral cortex. At adult ages, APC cKOs display spontaneous electroclinical seizures. These data provide the first evidence that malfunctions of APC/β-catenin pathways cause pathophysiological changes consistent with IS. Our findings demonstrate that the APC cKO is a new genetic model of IS, provide novel insights into molecular and functional alterations that can lead to IS, and suggest novel targets for therapeutic intervention.
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Affiliation(s)
- Antonella Pirone
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA 02111, United States
| | - Jonathan Alexander
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA 02111, United States; Neuroscience Program, Tufts Sackler School of Biomedical Sciences, Boston, MA 02111, United States
| | - Lauren A Lau
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA 02111, United States; Neuroscience Program, Tufts Sackler School of Biomedical Sciences, Boston, MA 02111, United States
| | - David Hampton
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA 02111, United States
| | - Andrew Zayachkivsky
- Department of Neurosurgery, Yale University School of Medicine, New Haven, CT 06520, United States
| | - Amy Yee
- Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, Boston, MA 02111, United States
| | - Audrey Yee
- VA Eastern Colorado Health System, Golden, CO 80401, United States
| | - Michele H Jacob
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA 02111, United States.
| | - Chris G Dulla
- Department of Neuroscience, Tufts University School of Medicine, Boston, MA 02111, United States.
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96
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Marzo A, Galli S, Lopes D, McLeod F, Podpolny M, Segovia-Roldan M, Ciani L, Purro S, Cacucci F, Gibb A, Salinas PC. Reversal of Synapse Degeneration by Restoring Wnt Signaling in the Adult Hippocampus. Curr Biol 2016; 26:2551-2561. [PMID: 27593374 PMCID: PMC5070786 DOI: 10.1016/j.cub.2016.07.024] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 07/05/2016] [Accepted: 07/12/2016] [Indexed: 11/30/2022]
Abstract
Synapse degeneration occurs early in neurodegenerative diseases and correlates strongly with cognitive decline in Alzheimer’s disease (AD). The molecular mechanisms that trigger synapse vulnerability and those that promote synapse regeneration after substantial synaptic failure remain poorly understood. Increasing evidence suggests a link between a deficiency in Wnt signaling and AD. The secreted Wnt antagonist Dickkopf-1 (Dkk1), which is elevated in AD, contributes to amyloid-β-mediated synaptic failure. However, the impact of Dkk1 at the circuit level and the mechanism by which synapses disassemble have not yet been explored. Using a transgenic mouse model that inducibly expresses Dkk1 in the hippocampus, we demonstrate that Dkk1 triggers synapse loss, impairs long-term potentiation, enhances long-term depression, and induces learning and memory deficits. We decipher the mechanism involved in synapse loss induced by Dkk1 as it can be prevented by combined inhibition of the Gsk3 and RhoA-Rock pathways. Notably, after loss of synaptic connectivity, reactivation of the Wnt pathway by cessation of Dkk1 expression completely restores synapse number, synaptic plasticity, and long-term memory. These findings demonstrate the remarkable capacity of adult neurons to regenerate functional circuits and highlight Wnt signaling as a targetable pathway for neuronal circuit recovery after synapse degeneration. Wnt signaling is required for synapse integrity in the adult hippocampus Dkk1 induces synapse loss and deficits in synaptic plasticity and long-term memory Dkk1 disassembles synapses by activating the Gsk3 and Rock pathways Synapse loss and memory defects are reversible by reactivation of the Wnt pathway
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Affiliation(s)
- Aude Marzo
- Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK
| | - Soledad Galli
- Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK
| | - Douglas Lopes
- Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK
| | - Faye McLeod
- Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK
| | - Marina Podpolny
- Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK
| | | | - Lorenza Ciani
- Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK
| | - Silvia Purro
- Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK
| | - Francesca Cacucci
- Department of Neuroscience, Physiology, and Pharmacology, University College London, London WC1E 6BT, UK
| | - Alasdair Gibb
- Department of Neuroscience, Physiology, and Pharmacology, University College London, London WC1E 6BT, UK
| | - Patricia C Salinas
- Department of Cell and Developmental Biology, University College London, London WC1E 6BT, UK.
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97
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Pećina-Šlaus N, Kafka A, Lechpammer M. Molecular Genetics of Intracranial Meningiomas with Emphasis on Canonical Wnt Signalling. Cancers (Basel) 2016; 8:E67. [PMID: 27429002 PMCID: PMC4963809 DOI: 10.3390/cancers8070067] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Revised: 06/27/2016] [Accepted: 07/07/2016] [Indexed: 12/15/2022] Open
Abstract
Research over the last decade recognized the importance of novel molecular pathways in pathogenesis of intracranial meningiomas. In this review, we focus on human brain tumours meningiomas and the involvement of Wnt signalling pathway genes and proteins in this common brain tumour, describing their known functional effects. Meningiomas originate from the meningeal layers of the brain and the spinal cord. Most meningiomas have benign clinical behaviour and are classified as grade I by World Health Organization (WHO). However, up to 20% histologically classified as atypical (grade II) or anaplastic (grade III) are associated with higher recurrent rate and have overall less favourable clinical outcome. Recently, there is emerging evidence that multiple signalling pathways including Wnt pathway contribute to the formation and growth of meningiomas. In the review we present the synopsis on meningioma histopathology and genetics and discuss our research regarding Wnt in meningioma. Epithelial-to-mesenchymal transition, a process in which Wnt signalling plays an important role, is shortly discussed.
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Affiliation(s)
- Nives Pećina-Šlaus
- Laboratory of Neuro-Oncology, Croatian Institute for Brain Research, School of Medicine, University of Zagreb, Salata 12, Zagreb 10000, Croatia.
- Department of Biology, School of Medicine, University of Zagreb, Salata 3, Zagreb 10000, Croatia.
| | - Anja Kafka
- Laboratory of Neuro-Oncology, Croatian Institute for Brain Research, School of Medicine, University of Zagreb, Salata 12, Zagreb 10000, Croatia.
- Department of Biology, School of Medicine, University of Zagreb, Salata 3, Zagreb 10000, Croatia.
| | - Mirna Lechpammer
- Department of Pathology & Laboratory Medicine, University of California, Davis, Medical Center 4400 V Street, Sacramento, CA 95817, USA.
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98
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Zaghlool A, Halvardson J, Zhao JJ, Etemadikhah M, Kalushkova A, Konska K, Jernberg-Wiklund H, Thuresson AC, Feuk L. A Role for the Chromatin-Remodeling Factor BAZ1A in Neurodevelopment. Hum Mutat 2016; 37:964-75. [PMID: 27328812 PMCID: PMC6681169 DOI: 10.1002/humu.23034] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2015] [Revised: 06/04/2016] [Accepted: 06/09/2016] [Indexed: 12/13/2022]
Abstract
Chromatin‐remodeling factors are required for a wide range of cellular and biological processes including development and cognition, mainly by regulating gene expression. As these functions would predict, deregulation of chromatin‐remodeling factors causes various disease syndromes, including neurodevelopmental disorders. Recent reports have linked mutations in several genes coding for chromatin‐remodeling factors to intellectual disability (ID). Here, we used exome sequencing and identified a nonsynonymous de novo mutation in BAZ1A (NM_182648.2:c.4043T > G, p.Phe1348Cys), encoding the ATP‐utilizing chromatin assembly and remodeling factor 1 (ACF1), in a patient with unexplained ID. ACF1 has been previously reported to bind to the promoter of the vitamin D receptor (VDR)‐regulated genes and suppress their expression. Our results show that the patient displays decreased binding of ACF1 to the promoter of the VDR‐regulated gene CYP24A1. Using RNA sequencing, we find that the mutation affects the expression of genes involved in several pathways including vitamin D metabolism, Wnt signaling and synaptic formation. RNA sequencing of BAZ1A knockdown cells and Baz1a knockout mice revealed that BAZ1A carry out distinctive functions in different tissues. We also demonstrate that BAZ1A depletion influence the expression of genes important for nervous system development and function. Our data point to an important role for BAZ1A in neurodevelopment, and highlight a possible link for BAZ1A to ID.
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Affiliation(s)
- Ammar Zaghlool
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Sweden
| | - Jonatan Halvardson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Sweden
| | - Jin J Zhao
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Sweden
| | - Mitra Etemadikhah
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Sweden
| | - Antonia Kalushkova
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Sweden
| | - Katarzyna Konska
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Sweden
| | - Helena Jernberg-Wiklund
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Sweden
| | - Ann-Charlotte Thuresson
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Sweden
| | - Lars Feuk
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Sweden
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99
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Libro R, Bramanti P, Mazzon E. The role of the Wnt canonical signaling in neurodegenerative diseases. Life Sci 2016; 158:78-88. [PMID: 27370940 DOI: 10.1016/j.lfs.2016.06.024] [Citation(s) in RCA: 117] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2016] [Revised: 06/20/2016] [Accepted: 06/26/2016] [Indexed: 01/06/2023]
Abstract
The Wnt/β-catenin or Wnt canonical pathway controls multiple biological processes throughout development and adult life. Growing evidences have suggested that deregulation of the Wnt canonical pathway could be involved in the pathogenesis of neurodegenerative diseases. The Wnt canonical signaling is a pathway tightly regulated, which activation results in the inhibition of the Glycogen Synthase Kinase 3β (GSK-3β) function and in increased β-catenin activity, that migrates into the nucleus, activating the transcription of the Wnt target genes. Conversely, when the Wnt canonical pathway is turned off, increased levels of GSK-3β promote β-catenin degradation. Hence, GSK-3β could be considered as a key regulator of the Wnt canonical pathway. Of note, GSK-3β has also been involved in the modulation of inflammation and apoptosis, determining the delicate balance between immune tolerance/inflammation and neuronal survival/neurodegeneration. In this review, we have summarized the current acknowledgements about the role of the Wnt canonical pathway in the pathogenesis of some neurodegenerative diseases including Alzheimer's disease, cerebral ischemia, Parkinson's disease, Huntington's disease, multiple sclerosis and amyotrophic lateral sclerosis, with particular regard to the main in vitro and in vivo studies in this field, by reviewing 85 research articles about.
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Affiliation(s)
- Rosaliana Libro
- IRCCS Centro Neurolesi "Bonino-Pulejo", Via Provinciale Palermo, Contrada Casazza, 98124 Messina, Italy
| | - Placido Bramanti
- IRCCS Centro Neurolesi "Bonino-Pulejo", Via Provinciale Palermo, Contrada Casazza, 98124 Messina, Italy
| | - Emanuela Mazzon
- IRCCS Centro Neurolesi "Bonino-Pulejo", Via Provinciale Palermo, Contrada Casazza, 98124 Messina, Italy.
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100
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Terauchi A, Johnson-Venkatesh EM, Bullock B, Lehtinen MK, Umemori H. Retrograde fibroblast growth factor 22 (FGF22) signaling regulates insulin-like growth factor 2 (IGF2) expression for activity-dependent synapse stabilization in the mammalian brain. eLife 2016; 5. [PMID: 27083047 PMCID: PMC4868541 DOI: 10.7554/elife.12151] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Accepted: 04/14/2016] [Indexed: 02/06/2023] Open
Abstract
Communication between pre- and postsynaptic cells promotes the initial organization of synaptic specializations, but subsequent synaptic stabilization requires transcriptional regulation. Here we show that fibroblast growth factor 22 (FGF22), a target-derived presynaptic organizer in the mouse hippocampus, induces the expression of insulin-like growth factor 2 (IGF2) for the stabilization of presynaptic terminals. FGF22 is released from CA3 pyramidal neurons and organizes the differentiation of excitatory nerve terminals formed onto them. Local application of FGF22 on the axons of dentate granule cells (DGCs), which are presynaptic to CA3 pyramidal neurons, induces IGF2 in the DGCs. IGF2, in turn, localizes to DGC presynaptic terminals and stabilizes them in an activity-dependent manner. IGF2 application rescues presynaptic defects of Fgf22(-/-) cultures. IGF2 is dispensable for the initial presynaptic differentiation, but is required for the following presynaptic stabilization both in vitro and in vivo. These results reveal a novel feedback signal that is critical for the activity-dependent stabilization of presynaptic terminals in the mammalian hippocampus.
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Affiliation(s)
- Akiko Terauchi
- Department of Neurology, F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, United States
| | - Erin M Johnson-Venkatesh
- Department of Neurology, F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, United States
| | - Brenna Bullock
- Department of Neurology, F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, United States
| | - Maria K Lehtinen
- Department of Pathology, F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, United States
| | - Hisashi Umemori
- Department of Neurology, F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, United States
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