1
|
Knorr U, Simonsen AH, Nilsson J, Brinkmalm A, Zetterberg H, Blennow K, Knudsen MB, Forman J, Hasselbalch SG, Kessing LV. Cerebrospinal fluid synaptic biomarker changes in bipolar disorder - A longitudinal case-control study. J Affect Disord 2024; 358:250-259. [PMID: 38723679 DOI: 10.1016/j.jad.2024.05.034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/03/2024] [Accepted: 05/04/2024] [Indexed: 05/13/2024]
Abstract
BACKGROUND This exploratory study investigated cerebrospinal fluid (CSF) synaptic protein biomarkers in bipolar disorder (BD), aiming to highlight the neurobiological basis of the disorder. With shared cognitive impairment features between BD and Alzheimer's disease, and considering increased dementia risk in BD patients, the study explores potential connections. METHODS Fifty-nine well-characterized patients with BD and thirty-seven healthy control individuals were examined and followed for one year. Synaptic proteins encompassing neuronal pentraxins (NPTX)1, NPTX2, and NPTX-receptor, 14-3-3 protein family epsilon, and zeta/delta, activating protein-2 complex subunit beta, synucleins beta-synuclein and gamma-synuclein, complexin-2, phosphatidylethanolamine-binding protein 1, rab GDP dissociation inhibitor alpha, and syntaxins 1B and 7 were measured in CSF using a microflow liquid chromatography-mass spectrometric multiple reaction monitoring set-up. Biomarker levels were compared between BD and HC and in BD before, during, and after mood episodes. RESULTS The synaptic proteins revealed no statistically significant differences between BD and HC, neither at baseline, one-year follow-up, or in terms of changes from baseline to follow-up. Moreover, the CSF synaptic protein levels in patients with BD were unaltered compared to baseline when they stabilized in euthymia following an affective episode and at one-year follow-up. LIMITATION It is uncertain what the CSF biomarker concentrations reflect since we yet do not know the mechanisms of release of these proteins, and we are uncertain of what increased or decreased levels reflect. CONCLUSION This first-ever investigation of a panel of CSF protein biomarkers of synaptic dysfunction in patients with BD and HC individuals found no statistically significant differences cross-sectionally or longitudinally.
Collapse
Affiliation(s)
- Ulla Knorr
- Copenhagen Affective Disorder Research Center (CADIC), Psychiatric Center Copenhagen, Department Rigshospitalet, Copenhagen, Denmark; Department of Clinical Medicine, University of Copenhagen, Denmark.
| | - Anja Hviid Simonsen
- Danish Dementia Research Center, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Johanna Nilsson
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden
| | - Ann Brinkmalm
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden; Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden
| | - Henrik Zetterberg
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden; Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden; Department of Neurodegenerative Disease, University College London, Queen Square, London, United Kingdom; UK Dementia Research Institute University College London, London, United Kingdom; Hong Kong Center for Neurodegenerative Diseases, Hong Kong, China; Wisconsin Alzheimer's Disease Research Center, University of Wisconsin School of Medicine and Public Health, University of Wisconsin-Madison, Madison, WI, USA
| | - Kaj Blennow
- Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry, the Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden; Clinical Neurochemistry Laboratory, Sahlgrenska University Hospital, Mölndal, Sweden; Paris Brain Institute, ICM, Pitié-Salpêtrière Hospital, Sorbonne University, Paris, France; Neurodegenerative Disorder Research Center, Division of Life Sciences and Medicine, and Department of Neurology, Institute on Aging and Brain Disorders, University of Science and Technology of China and First Affiliated Hospital of USTC, Hefei, PR China
| | - Mark Bech Knudsen
- Section of Biostatistics, Department of Public Health, University of Copenhagen, Denmark
| | - Julie Forman
- Section of Biostatistics, Department of Public Health, University of Copenhagen, Denmark
| | - Steen Gregers Hasselbalch
- Danish Dementia Research Center, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark; Department of Clinical Medicine, University of Copenhagen, Denmark
| | - Lars Vedel Kessing
- Copenhagen Affective Disorder Research Center (CADIC), Psychiatric Center Copenhagen, Department Rigshospitalet, Copenhagen, Denmark; Department of Clinical Medicine, University of Copenhagen, Denmark
| |
Collapse
|
2
|
Huang V, Roem J, Ng DK, McElrath Schwartz J, Everett AD, Padmanabhan N, Romero D, Joe J, Campbell C, Sigal GB, Wohlstadter JN, Bembea MM. Exploratory factor analysis yields grouping of brain injury biomarkers significantly associated with outcomes in neonatal and pediatric ECMO. Sci Rep 2024; 14:10790. [PMID: 38734737 PMCID: PMC11088671 DOI: 10.1038/s41598-024-61388-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Accepted: 05/06/2024] [Indexed: 05/13/2024] Open
Abstract
In this two-center prospective cohort study of children on ECMO, we assessed a panel of plasma brain injury biomarkers using exploratory factor analysis (EFA) to evaluate their interplay and association with outcomes. Biomarker concentrations were measured daily for the first 3 days of ECMO support in 95 participants. Unfavorable composite outcome was defined as in-hospital mortality or discharge Pediatric Cerebral Performance Category > 2 with decline ≥ 1 point from baseline. EFA grouped 11 biomarkers into three factors. Factor 1 comprised markers of cellular brain injury (NSE, BDNF, GFAP, S100β, MCP1, VILIP-1, neurogranin); Factor 2 comprised markers related to vascular processes (vWF, PDGFRβ, NPTX1); and Factor 3 comprised the BDNF/MMP-9 cellular pathway. Multivariable logistic models demonstrated that higher Factor 1 and 2 scores were associated with higher odds of unfavorable outcome (adjusted OR 2.88 [1.61, 5.66] and 1.89 [1.12, 3.43], respectively). Conversely, higher Factor 3 scores were associated with lower odds of unfavorable outcome (adjusted OR 0.54 [0.31, 0.88]), which is biologically plausible given the role of BDNF in neuroplasticity. Application of EFA on plasma brain injury biomarkers in children on ECMO yielded grouping of biomarkers into three factors that were significantly associated with unfavorable outcome, suggesting future potential as prognostic instruments.
Collapse
Affiliation(s)
- Victoria Huang
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, 1800 Orleans Street, Bloomberg Suite 6321, Baltimore, MD, 21287, USA
| | - Jennifer Roem
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Derek K Ng
- Department of Epidemiology, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD, USA
| | - Jamie McElrath Schwartz
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, 1800 Orleans Street, Bloomberg Suite 6321, Baltimore, MD, 21287, USA
| | - Allen D Everett
- Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | | | | | | | | | | | | | - Melania M Bembea
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, 1800 Orleans Street, Bloomberg Suite 6321, Baltimore, MD, 21287, USA.
| |
Collapse
|
3
|
Coutelier M, Jacoupy M, Janer A, Renaud F, Auger N, Saripella GV, Ancien F, Pucci F, Rooman M, Gilis D, Larivière R, Sgarioto N, Valter R, Guillot-Noel L, Le Ber I, Sayah S, Charles P, Nümann A, Pauly MG, Helmchen C, Deininger N, Haack TB, Brais B, Brice A, Trégouët DA, El Hachimi KH, Shoubridge EA, Durr A, Stevanin G. NPTX1 mutations trigger endoplasmic reticulum stress and cause autosomal dominant cerebellar ataxia. Brain 2022; 145:1519-1534. [PMID: 34788392 DOI: 10.1093/brain/awab407] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2021] [Revised: 09/25/2021] [Accepted: 10/10/2021] [Indexed: 11/14/2022] Open
Abstract
With more than 40 causative genes identified so far, autosomal dominant cerebellar ataxias exhibit a remarkable genetic heterogeneity. Yet, half the patients are lacking a molecular diagnosis. In a large family with nine sampled affected members, we performed exome sequencing combined with whole-genome linkage analysis. We identified a missense variant in NPTX1, NM_002522.3:c.1165G>A: p.G389R, segregating with the phenotype. Further investigations with whole-exome sequencing and an amplicon-based panel identified four additional unrelated families segregating the same variant, for whom a common founder effect could be excluded. A second missense variant, NM_002522.3:c.980A>G: p.E327G, was identified in a fifth familial case. The NPTX1-associated phenotype consists of a late-onset, slowly progressive, cerebellar ataxia, with downbeat nystagmus, cognitive impairment reminiscent of cerebellar cognitive affective syndrome, myoclonic tremor and mild cerebellar vermian atrophy on brain imaging. NPTX1 encodes the neuronal pentraxin 1, a secreted protein with various cellular and synaptic functions. Both variants affect conserved amino acid residues and are extremely rare or absent from public databases. In COS7 cells, overexpression of both neuronal pentraxin 1 variants altered endoplasmic reticulum morphology and induced ATF6-mediated endoplasmic reticulum stress, associated with cytotoxicity. In addition, the p.E327G variant abolished neuronal pentraxin 1 secretion, as well as its capacity to form a high molecular weight complex with the wild-type protein. Co-immunoprecipitation experiments coupled with mass spectrometry analysis demonstrated abnormal interactions of this variant with the cytoskeleton. In agreement with these observations, in silico modelling of the neuronal pentraxin 1 complex evidenced a destabilizing effect for the p.E327G substitution, located at the interface between monomers. On the contrary, the p.G389 residue, located at the protein surface, had no predictable effect on the complex stability. Our results establish NPTX1 as a new causative gene in autosomal dominant cerebellar ataxias. We suggest that variants in NPTX1 can lead to cerebellar ataxia due to endoplasmic reticulum stress, mediated by ATF6, and associated to a destabilization of NP1 polymers in a dominant-negative manner for one of the variants.
Collapse
Affiliation(s)
- Marie Coutelier
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
| | - Maxime Jacoupy
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
- Department of Human Genetics, McGill University, H3A 0C7 Montreal, Canada
- Montreal Neurological Institute, McGill University, H3A 2B4 Montreal, Canada
| | - Alexandre Janer
- Department of Human Genetics, McGill University, H3A 0C7 Montreal, Canada
- Montreal Neurological Institute, McGill University, H3A 2B4 Montreal, Canada
| | - Flore Renaud
- CNRS UMR 9019, Gustave Roussy, Université Paris-Saclay, 94805 Villejuif, France
- Neurogenetics team, Ecole Pratique des Hautes Etudes (EPHE), Paris Sciences Lettres (PSL) Research University, 75014, Paris, France
| | - Nicolas Auger
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
- Neurogenetics team, Ecole Pratique des Hautes Etudes (EPHE), Paris Sciences Lettres (PSL) Research University, 75014, Paris, France
| | - Ganapathi-Varma Saripella
- ICAN Institute, Pitié-Salpêtrière University Hospital, INSERM, Sorbonne Université, 75013 Paris, France
| | - François Ancien
- Computational Biology and Bioinformatics, Université libre de Bruxelles, 1050 Bruxelles, Belgium
| | - Fabrizio Pucci
- Computational Biology and Bioinformatics, Université libre de Bruxelles, 1050 Bruxelles, Belgium
| | - Marianne Rooman
- Computational Biology and Bioinformatics, Université libre de Bruxelles, 1050 Bruxelles, Belgium
| | - Dimitri Gilis
- Computational Biology and Bioinformatics, Université libre de Bruxelles, 1050 Bruxelles, Belgium
| | - Roxanne Larivière
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, H3A 2B4 Montreal, Canada
| | - Nicolas Sgarioto
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, H3A 2B4 Montreal, Canada
| | - Rémi Valter
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
- Neurogenetics team, Ecole Pratique des Hautes Etudes (EPHE), Paris Sciences Lettres (PSL) Research University, 75014, Paris, France
| | - Léna Guillot-Noel
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
- Neurogenetics team, Ecole Pratique des Hautes Etudes (EPHE), Paris Sciences Lettres (PSL) Research University, 75014, Paris, France
| | - Isabelle Le Ber
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
| | - Sabrina Sayah
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
| | - Perrine Charles
- Department of Genetics, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
| | - Astrid Nümann
- Department of Neurology, Charité University Hospital Berlin, 10117 Berlin, Germany
| | - Martje G Pauly
- Department of Neurology, University Hospital Schleswig Holstein Campus Luebeck, 23562 Luebeck, Germany
- Institute of Neurogenetics, University of Luebeck, 23562 Luebeck, Germany
| | - Christoph Helmchen
- Department of Neurology, University Hospital Schleswig Holstein Campus Luebeck, 23562 Luebeck, Germany
| | - Natalie Deininger
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076 Tuebingen, Germany
| | - Tobias B Haack
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076 Tuebingen, Germany
- Centre for Rare Diseases, University of Tübingen, 72076 Tuebingen, Germany
| | - Bernard Brais
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, H3A 2B4 Montreal, Canada
| | - Alexis Brice
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
| | - David-Alexandre Trégouët
- ICAN Institute, Pitié-Salpêtrière University Hospital, INSERM, Sorbonne Université, 75013 Paris, France
- Université de Bordeaux, INSERM U1219, Bordeaux Population Health Research Center, 33076 Bordeaux, France
| | - Khalid H El Hachimi
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
- Neurogenetics team, Ecole Pratique des Hautes Etudes (EPHE), Paris Sciences Lettres (PSL) Research University, 75014, Paris, France
| | - Eric A Shoubridge
- Department of Human Genetics, McGill University, H3A 0C7 Montreal, Canada
- Montreal Neurological Institute, McGill University, H3A 2B4 Montreal, Canada
| | - Alexandra Durr
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
| | - Giovanni Stevanin
- Sorbonne Université, Institut du Cerveau - Paris Brain Institute, ICM, INSERM U 1127, CNRS UMR 7225, APHP, Pitié-Salpêtrière University Hospital, 75013 Paris, France
- Neurogenetics team, Ecole Pratique des Hautes Etudes (EPHE), Paris Sciences Lettres (PSL) Research University, 75014, Paris, France
| |
Collapse
|
4
|
Cao X, Ma J, Li S. Mechanism of lncRNA SNHG16 in oxidative stress and inflammation in oxygen-glucose deprivation and reoxygenation-induced SK-N-SH cells. Bioengineered 2022; 13:5021-5034. [PMID: 35170375 PMCID: PMC8974115 DOI: 10.1080/21655979.2022.2026861] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Cerebral ischemia-reperfusion injury imposes a clinical challenge for physicians in the wake of ischemic stroke. Meanwhile, recent evidence has come to light eliciting the neuroprotective function of SNHG16 in cerebrovascular diseases. Accordingly, the current study sought to analyze the regulatory mechanism of long non-coding RNA small nucleolar RNA host gene16 (SNHG16) in oxidative stress (OS) injury and cell inflammation. Firstly, models of oxygen-glucose deprivation and reoxygenation (OGD/R) were established in SK-N-SH cells. Cell proliferation and apoptosis were appraised using cell counting kit-8 and flow cytometry. Additionally, SNHG16, X-linked inhibitor of apoptosis protein (XIAP), microRNA (miR-421), reactive oxygen species (ROS), lactate dehydrogenase (LDH), malondialdehyde (MDA), superoxide dismutase (SOD), tumor necrosis factor -α, interleukin (IL)-1β, and IL-10 expression patterns were determined. In addition, we determined and validated the subcellular localization of SNHG16 and the binding relationships between SNHG16 and miR-421, and miR-421 and XIAP. It was found that SNHG16 was poorly-expressed in OGD/R-treated cells. On the other hand, SNHG16 over-expression enhanced cell proliferation, inhibited apoptosis, and alleviated OS and cell inflammation. Furthermore, SNHG16 bound to miR-421 to facilitate the expression of XIAP. Up-regulation of miR-421 or down-regulation of XIAP could reverse the suppressive effects of SNHG16 on OS and cell inflammation. Collectively, our findings indicated that SNHG16 bound to miR-421 to facilitate XIAP expression, thus alleviating OS injury and inflammation in OGD/R-induced SK-N-SH cells.
Collapse
Affiliation(s)
- Xiangyuan Cao
- Department of Neurosurgery, Shanghai Tenth People's Hospital, Clinical Medical College of Nanjing Medical University, Shanghai, China
| | - Jingjing Ma
- School of Medicine, Shanghai Tenth People's Hospital, Tongji University, Shanghai, China
| | - Shaohua Li
- Department of Orthopedics, Shanghai Tenth People's Hospital, Clinical Medical College of Nanjing Medical University, Shanghai, China
| |
Collapse
|
5
|
Gómez de San José N, Massa F, Halbgebauer S, Oeckl P, Steinacker P, Otto M. Neuronal pentraxins as biomarkers of synaptic activity: from physiological functions to pathological changes in neurodegeneration. J Neural Transm (Vienna) 2022; 129:207-230. [PMID: 34460014 PMCID: PMC8866268 DOI: 10.1007/s00702-021-02411-2] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Accepted: 08/17/2021] [Indexed: 12/22/2022]
Abstract
The diagnosis of neurodegenerative disorders is often challenging due to the lack of diagnostic tools, comorbidities and shared pathological manifestations. Synaptic dysfunction is an early pathological event in many neurodegenerative disorders, but the underpinning mechanisms are still poorly characterised. Reliable quantification of synaptic damage is crucial to understand the pathophysiology of neurodegeneration, to track disease status and to obtain prognostic information. Neuronal pentraxins (NPTXs) are extracellular scaffolding proteins emerging as potential biomarkers of synaptic dysfunction in neurodegeneration. They are a family of proteins involved in homeostatic synaptic plasticity by recruiting post-synaptic receptors into synapses. Recent research investigates the dynamic changes of NPTXs in the cerebrospinal fluid (CSF) as an expression of synaptic damage, possibly related to cognitive impairment. In this review, we summarise the available data on NPTXs structure and expression patterns as well as on their contribution in synaptic function and plasticity and other less well-characterised roles. Moreover, we propose a mechanism for their involvement in synaptic damage and neurodegeneration and assess their potential as CSF biomarkers for neurodegenerative diseases.
Collapse
Affiliation(s)
| | - Federico Massa
- Department of Neurology, University of Ulm, Ulm, Germany
- Department of Neuroscience, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health (DINOGMI), University of Genoa, Genoa, Italy
| | | | - Patrick Oeckl
- Department of Neurology, University of Ulm, Ulm, Germany
- German Center for Neurodegenerative Diseases (DZNE E.V.), Ulm, Germany
| | | | - Markus Otto
- Department of Neurology, University of Ulm, Ulm, Germany.
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Ernst-Grube-Str. 40, 06120, Halle (Saale), Germany.
| |
Collapse
|
6
|
Vigeland MD, Flåm ST, Vigeland MD, Espeland A, Kristoffersen PM, Vetti N, Wigemyr M, Bråten LCH, Gjefsen E, Schistad EI, Haugen AJ, Froholdt A, Skouen JS, Zwart JA, Storheim K, Pedersen LM, Lie BA. Correlation between gene expression and MRI STIR signals in patients with chronic low back pain and Modic changes indicates immune involvement. Sci Rep 2022; 12:215. [PMID: 34997115 PMCID: PMC8741947 DOI: 10.1038/s41598-021-04189-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Accepted: 12/16/2021] [Indexed: 01/02/2023] Open
Abstract
Disability and distress caused by chronic low back pain (LBP) lacking clear pathoanatomical explanations cause huge problems both for patients and society. A subgroup of patients has Modic changes (MC), identifiable by MRI as vertebral bone marrow lesions. The cause of such changes and their relationship to pain are not yet understood. We explored the pathobiology of these lesions using profiling of gene expression in blood, coupled with an edema-sensitive MRI technique known as short tau inversion recovery (STIR) imaging. STIR images and total RNA from blood were collected from 96 patients with chronic LBP and MC type I, the most inflammatory MC state. We found the expression of 37 genes significantly associated with STIR signal volume, ten genes with edema abundancy (a constructed combination of STIR signal volume, height, and intensity), and one gene with expression levels significantly associated with maximum STIR signal intensity. Gene sets related to interferon signaling, mitochondrial metabolism and defense response to virus were identified as significantly enriched among the upregulated genes in all three analyses. Our results point to inflammation and immunological defense as important players in MC biology in patients with chronic LBP.
Collapse
Affiliation(s)
- Maria Dehli Vigeland
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway. .,Faculty of Medicine, University of Oslo, Oslo, Norway.
| | - Siri Tennebø Flåm
- Department of Medical Genetics, Oslo University Hospital, Oslo, Norway
| | - Magnus Dehli Vigeland
- Faculty of Medicine, University of Oslo, Oslo, Norway.,Department of Medical Genetics, Oslo University Hospital, Oslo, Norway
| | - Ansgar Espeland
- Department of Radiology, Haukeland University Hospital, Bergen, Norway.,Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Per Martin Kristoffersen
- Department of Radiology, Haukeland University Hospital, Bergen, Norway.,Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Nils Vetti
- Department of Radiology, Haukeland University Hospital, Bergen, Norway.,Department of Clinical Medicine, University of Bergen, Bergen, Norway
| | - Monica Wigemyr
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway
| | - Lars Christian Haugli Bråten
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway
| | - Elisabeth Gjefsen
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | | | | | - Anne Froholdt
- Department of Physical Medicine and Rehabilitation, Drammen Hospital, Drammen, Norway
| | - Jan Sture Skouen
- Department of Physical Medicine and Rehabilitation, Haukeland University Hospital, Bergen, Norway.,Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway
| | - John-Anker Zwart
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway.,Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Kjersti Storheim
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway.,Department of Physiotherapy, Oslo Metropolitan University, Oslo, Norway
| | - Linda Margareth Pedersen
- Division of Clinical Neuroscience, Department of Research, Innovation and Education, Oslo University Hospital, Oslo, Norway.,Department of Physiotherapy, Oslo Metropolitan University, Oslo, Norway
| | | | | |
Collapse
|
7
|
Al Rahim M, Thatipamula S, Pasinetti GM, Hossain MA. Neuronal Pentraxin 1 Promotes Hypoxic-Ischemic Neuronal Injury by Impairing Mitochondrial Biogenesis via Interactions With Active Bax[6A7] and Mitochondrial Hexokinase II. ASN Neuro 2021; 13:17590914211012888. [PMID: 34098747 PMCID: PMC8191073 DOI: 10.1177/17590914211012888] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Mitochondrial dysfunction is a key mechanism of cell death in hypoxic-ischemic brain injury. Neuronal pentraxin 1 (NP1) has been shown to play crucial roles in mitochondria-mediated neuronal death. However, the underlying mechanism(s) of NP1-induced mitochondrial dysfunction in hypoxia-ischemia (HI) remains obscure. Here, we report that NP1 induction following HI and its subsequent localization to mitochondria, leads to disruption of key regulatory proteins for mitochondrial biogenesis. Brain mitochondrial DNA (mtDNA) content and mtDNA-encoded subunit I of complex IV (mtCOX-1) expression was increased post-HI, but not the nuclear DNA-encoded subunit of complex II (nSDH-A). Up-regulation of mitochondrial proteins COXIV and HSP60 further supported enhanced mtDNA function. NP1 interaction with active Bax (Bax6A7) was increased in the brain after HI and in oxygen-glucose deprivation (OGD)-induced neuronal cultures. Importantly, NP1 colocalized with mitochondrial hexokinase II (mtHKII) following OGD leading to HKII dissociation from mitochondria. Knockdown of NP1 or SB216763, a GSK-3 inhibitor, prevented OGD-induced mtHKII dissociation and cellular ATP decrease. NP1 also modulated the expression of mitochondrial transcription factor A (Tfam) and peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α), regulators of mitochondrial biogenesis, following HI. Together, we reveal crucial roles of NP1 in mitochondrial biogenesis involving interactions with Bax[6A7] and mtHKII in HI brain injury.
Collapse
Affiliation(s)
- Md Al Rahim
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, Maryland, United States.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States.,Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, New York, United States
| | - Shabarish Thatipamula
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, Maryland, United States.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| | - Giulio M Pasinetti
- Department of Neurology, Icahn School of Medicine at Mount Sinai, New York, New York, United States.,James J. Peters Veterans Affairs Medical Center, Bronx, New York, United States
| | - Mir Ahamed Hossain
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, Maryland, United States.,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
| |
Collapse
|
8
|
Kovács RÁ, Vadászi H, Bulyáki É, Török G, Tóth V, Mátyás D, Kun J, Hunyadi-Gulyás É, Fedor FZ, Csincsi Á, Medzihradszky K, Homolya L, Juhász G, Kékesi KA, Józsi M, Györffy BA, Kardos J. Identification of Neuronal Pentraxins as Synaptic Binding Partners of C1q and the Involvement of NP1 in Synaptic Pruning in Adult Mice. Front Immunol 2021; 11:599771. [PMID: 33628204 PMCID: PMC7897678 DOI: 10.3389/fimmu.2020.599771] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 12/21/2020] [Indexed: 12/13/2022] Open
Abstract
Elements of the immune system particularly that of innate immunity, play important roles beyond their traditional tasks in host defense, including manifold roles in the nervous system. Complement-mediated synaptic pruning is essential in the developing and healthy functioning brain and becomes aberrant in neurodegenerative disorders. C1q, component of the classical complement pathway, plays a central role in tagging synapses for elimination; however, the underlying molecular mechanisms and interaction partners are mostly unknown. Neuronal pentraxins (NPs) are involved in synapse formation and plasticity, moreover, NP1 contributes to cell death and neurodegeneration under adverse conditions. Here, we investigated the potential interaction between C1q and NPs, and its role in microglial phagocytosis of synapses in adult mice. We verified in vitro that NPs interact with C1q, as well as activate the complement system. Flow cytometry, immunostaining and co-immunoprecipitation showed that synapse-bound C1q colocalizes and interacts with NPs. High-resolution confocal microscopy revealed that microglia-surrounded C1q-tagged synapses are NP1 positive. We have also observed the synaptic occurrence of C4 suggesting that activation of the classical pathway cannot be ruled out in synaptic plasticity in healthy adult animals. In summary, our results indicate that NPs play a regulatory role in the synaptic function of C1q. Whether this role can be intensified upon pathological conditions, such as in Alzheimer’s disease, is to be disclosed.
Collapse
Affiliation(s)
- Réka Á Kovács
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Henrietta Vadászi
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Éva Bulyáki
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - György Török
- Molecular Cell Biology Research Group, Institute of Enzymology, Research Center for Natural Sciences, Hungarian Academy of Sciences Centre of Excellence, Budapest, Hungary.,Department of Biophysics and Radiation Biology, Semmelweis University, Budapest, Hungary
| | - Vilmos Tóth
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary.,Laboratory of Proteomics, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Dominik Mátyás
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary.,Laboratory of Proteomics, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Judit Kun
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Éva Hunyadi-Gulyás
- Laboratory of Proteomics Research, Biological Research Centre, Eötvös Loránd Research Network (ELKH), Szeged, Hungary
| | - Flóra Zsófia Fedor
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary.,Doctoral School of Chemical Engineering and Material Sciences, Pannon University, Veszprém, Hungary
| | - Ádám Csincsi
- Complement Research Group, Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Katalin Medzihradszky
- Laboratory of Proteomics Research, Biological Research Centre, Eötvös Loránd Research Network (ELKH), Szeged, Hungary
| | - László Homolya
- Molecular Cell Biology Research Group, Institute of Enzymology, Research Center for Natural Sciences, Hungarian Academy of Sciences Centre of Excellence, Budapest, Hungary
| | - Gábor Juhász
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary.,Laboratory of Proteomics, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Katalin A Kékesi
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary.,Laboratory of Proteomics, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary.,Department of Physiology and Neurobiology, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Mihály Józsi
- Complement Research Group, Department of Immunology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - Balázs A Györffy
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary.,Laboratory of Proteomics, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| | - József Kardos
- ELTE NAP Neuroimmunology Research Group, Department of Biochemistry, Institute of Biology, ELTE Eötvös Loránd University, Budapest, Hungary
| |
Collapse
|
9
|
Zhao M, Wang J, Yuan M, Ma Z, Bao Y, Hui Z. Multivariate gene expression-based survival predictor model in esophageal adenocarcinoma. Thorac Cancer 2020; 11:2896-2908. [PMID: 32869505 PMCID: PMC7529573 DOI: 10.1111/1759-7714.13626] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 12/15/2022] Open
Abstract
Background Despite the recent development of molecular‐targeted treatment and immunotherapy, survival of patients with esophageal adenocarcinoma (EAC) with poor prognosis is still poor due to lack of an effective biomarker. In this study, we aimed to explore the ceRNA and construct a multivariate gene expression predictor model using data from The Cancer Genome Atlas (TCGA) to predict the prognosis of EAC patients. Methods We conducted differential expression analysis using mRNA, miRNA and lncRNA transciptome data from EAC and normal patients as well as corresponding clinical information from TCGA database, and gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analysis of those unique differentially expressed mRNAs using the Integrate Discovery Database (DAVID) database. We then constructed the lncRNA‐miRNA‐mRNA competing endogenous RNA (ceRNA) network of EAC and used Cox proportional hazard analysis to generate a multivariate gene expression predictor model. We finally performed survival analysis to determine the effect of differentially expressed mRNA on patients' overall survival and discover the hub gene. Results We identified a total of 488 lncRNAs, 33 miRNAs, and 1207 mRNAs with differentially expressed profiles. Cox proportional hazard analysis and survival analysis using the ceRNA network revealed four genes (IL‐11, PDGFD, NPTX1, ITPR1) as potential biomarkers of EAC prognosis in our predictor model, and IL‐11 was identified as an independent prognostic factor. Conclusions In conclusion, we identified differences in the ceRNA regulatory networks and constructed a four–gene expression‐based survival predictor model, which could be referential for future clinical research.
Collapse
Affiliation(s)
- Maoyuan Zhao
- Department of Radiation Oncology, National Cancer Center/ National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Jingsong Wang
- State Key Laboratory of Molecular Oncology, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Meng Yuan
- Department of Radiation Oncology, National Cancer Center/ National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Zeliang Ma
- Department of Radiation Oncology, National Cancer Center/ National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Yongxin Bao
- Department of Radiation Oncology, National Cancer Center/ National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| | - Zhouguang Hui
- Department of Radiation Oncology, National Cancer Center/ National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China.,Department of VIP Medical Services, National Cancer Center/ National Clinical Research Center for Cancer/ Cancer Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing, China
| |
Collapse
|
10
|
Al Rahim M, Yoon Y, Dimovasili C, Shao Z, Huang Q, Zhang E, Kezunovic N, Chen L, Schaffner A, Huntley GW, Ubarretxena-Belandia I, Georgakopoulos A, Robakis NK. Presenilin1 familial Alzheimer disease mutants inactivate EFNB1- and BDNF-dependent neuroprotection against excitotoxicity by affecting neuroprotective complexes of N-methyl-d-aspartate receptor. Brain Commun 2020; 2:fcaa100. [PMID: 33005890 PMCID: PMC7520050 DOI: 10.1093/braincomms/fcaa100] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2020] [Revised: 05/15/2020] [Accepted: 05/22/2020] [Indexed: 12/11/2022] Open
Abstract
Excitotoxicity is thought to play key roles in brain neurodegeneration and stroke. Here we show that neuroprotection against excitotoxicity by trophic factors EFNB1 and brain-derived neurotrophic factor (called here factors) requires de novo formation of 'survival complexes' which are factor-stimulated complexes of N-methyl-d-aspartate receptor with factor receptor and presenilin 1. Absence of presenilin 1 reduces the formation of survival complexes and abolishes neuroprotection. EPH receptor B2- and N-methyl-d-aspartate receptor-derived peptides designed to disrupt formation of survival complexes also decrease the factor-stimulated neuroprotection. Strikingly, factor-dependent neuroprotection and levels of the de novo factor-stimulated survival complexes decrease dramatically in neurons expressing presenilin 1 familial Alzheimer disease mutants. Mouse neurons and brains expressing presenilin 1 familial Alzheimer disease mutants contain increased amounts of constitutive presenilin 1-N-methyl-d-aspartate receptor complexes unresponsive to factors. Interestingly, the stability of the familial Alzheimer disease presenilin 1-N-methyl-d-aspartate receptor complexes differs from that of wild type complexes and neurons of mutant-expressing brains are more vulnerable to cerebral ischaemia than neurons of wild type brains. Furthermore, N-methyl-d-aspartate receptor-mediated excitatory post-synaptic currents at CA1 synapses are altered by presenilin 1 familial Alzheimer disease mutants. Importantly, high levels of presenilin 1-N-methyl-d-aspartate receptor complexes are also found in post-mortem brains of Alzheimer disease patients expressing presenilin 1 familial Alzheimer disease mutants. Together, our data identify a novel presenilin 1-dependent neuroprotective mechanism against excitotoxicity and indicate a pathway by which presenilin 1 familial Alzheimer disease mutants decrease factor-depended neuroprotection against excitotoxicity and ischaemia in the absence of Alzheimer disease neuropathological hallmarks which may form downstream of neuronal damage. These findings have implications for the pathogenic effects of familial Alzheimer disease mutants and therapeutic strategies.
Collapse
Affiliation(s)
- Md Al Rahim
- Departments of Psychiatry and Neuroscience, Center for Molecular Biology and Genetics of Neurodegeneration, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Yonejung Yoon
- Departments of Psychiatry and Neuroscience, Center for Molecular Biology and Genetics of Neurodegeneration, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Christina Dimovasili
- Departments of Psychiatry and Neuroscience, Center for Molecular Biology and Genetics of Neurodegeneration, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Zhiping Shao
- Departments of Psychiatry and Neuroscience, Center for Molecular Biology and Genetics of Neurodegeneration, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Qian Huang
- Departments of Psychiatry and Neuroscience, Center for Molecular Biology and Genetics of Neurodegeneration, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Emily Zhang
- Departments of Psychiatry and Neuroscience, Center for Molecular Biology and Genetics of Neurodegeneration, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Nebojsa Kezunovic
- Nash Family Department of Neuroscience, and the Friedman Brain Institute, The Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Lei Chen
- Departments of Psychiatry and Neuroscience, Center for Molecular Biology and Genetics of Neurodegeneration, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Adam Schaffner
- Department of Pharmacological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - George W Huntley
- Nash Family Department of Neuroscience, and the Friedman Brain Institute, The Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | | | - Anastasios Georgakopoulos
- Departments of Psychiatry and Neuroscience, Center for Molecular Biology and Genetics of Neurodegeneration, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Nikolaos K Robakis
- Departments of Psychiatry and Neuroscience, Center for Molecular Biology and Genetics of Neurodegeneration, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| |
Collapse
|
11
|
Chew S, Lampinen R, Saveleva L, Korhonen P, Mikhailov N, Grubman A, Polo JM, Wilson T, Komppula M, Rönkkö T, Gu C, Mackay-Sim A, Malm T, White AR, Jalava P, Kanninen KM. Urban air particulate matter induces mitochondrial dysfunction in human olfactory mucosal cells. Part Fibre Toxicol 2020; 17:18. [PMID: 32487172 PMCID: PMC7268298 DOI: 10.1186/s12989-020-00352-4] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 05/20/2020] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND The adverse effects of air pollutants including particulate matter (PM) on the central nervous system is increasingly reported by epidemiological, animal and post-mortem studies in the last decade. Oxidative stress and inflammation are key consequences of exposure to PM although little is known of the exact mechanism. The association of PM exposure with deteriorating brain health is speculated to be driven by PM entry via the olfactory system. How air pollutants affect this key entry site remains elusive. In this study, we investigated effects of urban size-segregated PM on a novel cellular model: primary human olfactory mucosal (hOM) cells. RESULTS Metabolic activity was reduced following 24-h exposure to PM without evident signs of toxicity. Results from cytometric bead array suggested a mild inflammatory response to PM exposure. We observed increased oxidative stress and caspase-3/7 activity as well as perturbed mitochondrial membrane potential in PM-exposed cells. Mitochondrial dysfunction was further verified by a decrease in mitochondria-dependent respiration. Transient suppression of the mitochondria-targeted gene, neuronal pentraxin 1 (NPTX1), was carried out, after being identified to be up-regulated in PM2.5-1 treated cells via RNA sequencing. Suppression of NPTX1 in cells exposed to PM did not restore mitochondrial defects resulting from PM exposure. In contrast, PM-induced adverse effects were magnified in the absence of NPTX1, indicating a critical role of this protein in protection against PM effects in hOM cells. CONCLUSION Key mitochondrial functions were perturbed by urban PM exposure in a physiologically relevant cellular model via a mechanism involving NPTX1. In addition, inflammatory response and early signs of apoptosis accompanied mitochondrial dysfunction during exposure to PM. Findings from this study contribute to increased understanding of harmful PM effects on human health and may provide information to support mitigation strategies targeted at air pollution.
Collapse
Affiliation(s)
- Sweelin Chew
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Riikka Lampinen
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Liudmila Saveleva
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Paula Korhonen
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Nikita Mikhailov
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Alexandra Grubman
- Department of Anatomy and Developmental Biology, Monash University, Wellington Road, Clayton, Victoria, Australia
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute, Wellington Road, Clayton, Victoria, Australia
- Australian Regenerative Medicine Institute, Monash University, Wellington Road, Clayton, Victoria, Australia
| | - Jose M Polo
- Department of Anatomy and Developmental Biology, Monash University, Wellington Road, Clayton, Victoria, Australia
- Development and Stem Cells Program, Monash Biomedicine Discovery Institute, Wellington Road, Clayton, Victoria, Australia
- Australian Regenerative Medicine Institute, Monash University, Wellington Road, Clayton, Victoria, Australia
| | - Trevor Wilson
- Hudson Institute of Medical Research, Clayton, VIC, 3168, Australia
| | | | - Teemu Rönkkö
- Inhalation Toxicology Laboratory, Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Cheng Gu
- School of the Environment, Nanjing University, Nanjing, China
| | - Alan Mackay-Sim
- Griffith Institute for Drug Discovery, Griffith University, Nathan, QLD, 4111, Australia
| | - Tarja Malm
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland
| | - Anthony R White
- QIMR Berghofer Medical Research Institute, Herston, QLD, 4006, Australia
| | - Pasi Jalava
- Inhalation Toxicology Laboratory, Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Katja M Kanninen
- A.I. Virtanen Institute for Molecular Sciences, University of Eastern Finland, Kuopio, Finland.
| |
Collapse
|
12
|
Wang MR, Zhang XJ, Liu HC, Ma WD, Zhang ML, Zhang Y, Li X, Dou MM, Jing YL, Chu YJ, Zhu L. Matrine protects oligodendrocytes by inhibiting their apoptosis and enhancing mitochondrial autophagy. Brain Res Bull 2019; 153:30-38. [DOI: 10.1016/j.brainresbull.2019.08.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 07/03/2019] [Accepted: 08/07/2019] [Indexed: 12/16/2022]
|
13
|
As a downstream target of the AKT pathway, NPTX1 inhibits proliferation and promotes apoptosis in hepatocellular carcinoma. Biosci Rep 2019; 39:BSR20181662. [PMID: 31113871 PMCID: PMC6549097 DOI: 10.1042/bsr20181662] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2018] [Revised: 04/26/2019] [Accepted: 05/20/2019] [Indexed: 01/04/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is correlated with a poor prognosis and high mortality worldwide. Neuronal pentraxin 1 (NPTX1) has been reported to play an oncogenic role in several types of tumors. However, its expression and function in HCC is not yet fully understood. In the present study, we aimed to investigate the clinicopathological significance of NPTX1 in HCC and the underlying mechanisms. We observed that the expression of NPTX1 was decreased significantly in HCC and was associated with tumor size and metastasis in patients. Gain-of-function approaches revealed that NPTX1 suppressed the growth ability of HCC cells and contributed to mitochondria- related apoptosis. Furthermore, mechanistic investigations showed that the AKT (AKT serine/threonine kinase) pathway can regulate the effects of NPTX1 in HCC cells. After blocking the AKT pathway, the action of NPTX1 was greatly increased. In summary, we demonstrated that NPTX1 inhibited growth and promoted apoptosis in HCC via an AKT-mediated signaling mechanism. These findings indicate that NPTX1 is a potential clinical therapeutic target.
Collapse
|
14
|
Yang L, Dong Y, Wu C, Li Y, Guo Y, Yang B, Zong X, Hamblin MR, Cheng-Yi Liu T, Zhang Q. Photobiomodulation preconditioning prevents cognitive impairment in a neonatal rat model of hypoxia-ischemia. JOURNAL OF BIOPHOTONICS 2019; 12:e201800359. [PMID: 30652418 PMCID: PMC6546525 DOI: 10.1002/jbio.201800359] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/02/2018] [Accepted: 01/12/2019] [Indexed: 05/13/2023]
Abstract
Neonatal hypoxia-ischemia (HI) injury caused by oxygen deprivation is the most common cause of mortality and severe neurologic deficits in neonates. The present work evaluated the preventative effect of photobiomodulation (PBM) preconditioning, and its underlying mechanism of action on brain damage in an HI model in neonatal rats. According to the optimal time response of ATP levels in brain samples removed from normal rats, a PBM preconditioning (PBM-P) regimen (808 nm CW laser, 1 cm2 spot, 100 mW/cm2 , 12 J/cm2 ) was delivered to the scalp 6 hours before HI. PBM-P significantly attenuated cognitive impairment, volume shrinkage in the brain, neuron loss, dendritic and synaptic injury after HI. Further mechanistic investigation found that PBM-P could restore HI-induced mitochondrial dynamics and inhibit mitochondrial fragmentation, followed by a robust suppression of cytochrome c release, and prevention of neuronal apoptosis by inhibition of caspase activation. Our work suggests that PBM-P can attenuate HI-induced brain injury by maintaining mitochondrial dynamics and inhibiting the mitochondrial apoptotic pathway.
Collapse
Affiliation(s)
- Luodan Yang
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, GD 510006, China
- Department of Neuroscience & Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912
| | - Yan Dong
- Department of Neuroscience & Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912
| | - Chongyun Wu
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, GD 510006, China
| | - Yong Li
- Department of Neuroscience & Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912
| | - Yichen Guo
- Department of Neuroscience & Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912
| | - Baocheng Yang
- Department of Neuroscience & Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912
| | - Xuemei Zong
- Department of Neuroscience & Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912
| | - Michael R. Hamblin
- Wellman Center for Photomedicine, Massachusetts General Hospital, Boston, MA 02114, USA
- Department of Dermatology, Harvard Medical School, Boston, MA 02115, USA
- Harvard-MIT Division of Health Sciences and Technology, Cambridge, MA 02139, USA
| | - Timon Cheng-Yi Liu
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, GD 510006, China
| | - Quanguang Zhang
- Laboratory of Laser Sports Medicine, College of Physical Education and Sports Science, South China Normal University, University Town, Guangzhou, GD 510006, China
| |
Collapse
|
15
|
Yan H, Zheng C, Li Z, Bao B, Yang B, Hou K, Qu X, Xiao J, Che X, Liu Y. NPTX1 promotes metastasis via integrin/FAK signaling in gastric cancer. Cancer Manag Res 2019; 11:3237-3251. [PMID: 31043800 PMCID: PMC6472287 DOI: 10.2147/cmar.s196509] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
PURPOSE This study aimed to investigate the effect of NPTX1 on the prognosis of gastric cancer (GC), as well as the metastatic process in GC. MATERIALS AND METHODS The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) databases were used to analyze the association between NPTX1 expression and prognosis in GC. Quantitative real-time polymerase chain reaction and Western blots were applied to examine the expression of NPTX1 in GC cell lines and expression of genes in downstream pathways. The role of NPTX1 on the migration, invasion, adhesion, and proliferation of GC cell lines was investigated with the transwell assay, the adhesion assay, and the MTT assay. Immunofluorescence staining was used to observe the effect of NPTX1 knockdown on the morphology of cells. RESULTS According to the review of TCGA and GEO databases of GC, we found that the expression of NPTX1 increased in cancer tissues and high NPTX1 expression was correlated with poor overall survival, which was associated with lymph node stage in clinicopathologic parameters. Knockdown of NPTX1 attenuated the migration, invasion, and adhesion abilities of GC cells. According to gene set enrichment analysis, NPTX1 was found to be positively related to integrin and focal adhesion (FA). Additionally, NPTX1 knockdown decreased the expression of integrin α1 and integrin α7, followed by deregulation of the expression of p-Src, p-Akt, p-Erk, MMP2, and MMP7, as well as inhibiting the formation of FA complexes and decreasing the length of pseudopods in GC cells. CONCLUSION Our study provides strong evidence that NPTX1 plays a crucial role in promoting metastasis and acts as a prognostic indicator in GC.
Collapse
Affiliation(s)
- Hongfei Yan
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang 110001, China, ;
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang 110001, China, ;
| | - Chunlei Zheng
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang 110001, China, ;
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang 110001, China, ;
| | - Zhi Li
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang 110001, China, ;
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang 110001, China, ;
| | - Bowen Bao
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang 110001, China, ;
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang 110001, China, ;
| | - Bowen Yang
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang 110001, China, ;
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang 110001, China, ;
| | - Kezuo Hou
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang 110001, China, ;
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang 110001, China, ;
| | - Xiujuan Qu
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang 110001, China, ;
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang 110001, China, ;
| | - Jiawen Xiao
- Department of Medical Oncology, Shenyang Fifth People Hospital, Tiexi District, Shenyang 110001, China
| | - Xiaofang Che
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang 110001, China, ;
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang 110001, China, ;
| | - Yunpeng Liu
- Department of Medical Oncology, The First Hospital of China Medical University, Shenyang 110001, China, ;
- Key Laboratory of Anticancer Drugs and Biotherapy of Liaoning Province, The First Hospital of China Medical University, Shenyang 110001, China, ;
| |
Collapse
|
16
|
Abstract
Synaptic pruning is dominant in early ontogenesis when a large number of unnecessary synapses are eliminated, and it maintains synaptic plasticity in the mature healthy brain, e.g., in memory processes. Its malfunction is involved in degenerative diseases such as Alzheimer’s disease. C1q, a member of the immune complement system, plays a central role in the selective pruning of synapses by microglial phagocytosis. Understanding the molecular aspects of complement-mediated synapse elimination is of high importance for developing effective therapeutic interventions in the future. Our analysis on C1q-tagged synaptosomes revealed that C1q label-based synaptic pruning is linked to local apoptotic-like processes in synapses. C1q, a member of the immune complement cascade, is implicated in the selective pruning of synapses by microglial phagocytosis. C1q-mediated synapse elimination has been shown to occur during brain development, while increased activation and complement-dependent synapse loss is observed in neurodegenerative diseases. However, the molecular mechanisms underlying C1q-controlled synaptic pruning are mostly unknown. This study addresses distortions in the synaptic proteome leading to C1q-tagged synapses. Our data demonstrated the preferential localization of C1q to the presynapse. Proteomic investigation and pathway analysis of C1q-tagged synaptosomes revealed the presence of apoptotic-like processes in C1q-tagged synapses, which was confirmed experimentally with apoptosis markers. Moreover, the induction of synaptic apoptotic-like mechanisms in a model of sensory deprivation-induced synaptic depression led to elevated C1q levels. Our results unveiled that C1q label-based synaptic pruning is triggered by and directly linked to apoptotic-like processes in the synaptic compartment.
Collapse
|
17
|
Ma QL, Teng E, Zuo X, Jones M, Teter B, Zhao EY, Zhu C, Bilousova T, Gylys KH, Apostolova LG, LaDu MJ, Hossain MA, Frautschy SA, Cole GM. Neuronal pentraxin 1: A synaptic-derived plasma biomarker in Alzheimer's disease. Neurobiol Dis 2018; 114:120-128. [PMID: 29501530 DOI: 10.1016/j.nbd.2018.02.014] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 02/11/2018] [Accepted: 02/21/2018] [Indexed: 01/03/2023] Open
Abstract
Synaptic neurodegeneration is thought to be an early event initiated by soluble β-amyloid (Aβ) aggregates that closely correlates with cognitive decline in Alzheimer disease (AD). Apolipoprotein ε4 (APOE4) is the most common genetic risk factor for both familial AD (FAD) and sporadic AD; it accelerates Aβ aggregation and selectively impairs glutamate receptor function and synaptic plasticity. However, its molecular mechanisms remain elusive and these synaptic deficits are difficult to monitor. AD- and APOE4-dependent plasma biomarkers have been proposed, but synapse-related plasma biomarkers are lacking. We evaluated neuronal pentraxin 1 (NP1), a potential CNS-derived plasma biomarker of excitatory synaptic pathology. NP1 is preferentially expressed in brain and involved in glutamate receptor internalization. NP1 is secreted presynaptically induced by Aβ oligomers, and implicated in excitatory synaptic and mitochondrial deficits. Levels of NP1 and its fragments were increased in a correlated fashion in both brain and plasma of 7-8 month-old E4FAD mice relative to E3FAD mice. NP1 was also found in exosome preparations and reduced by dietary DHA supplementation. Plasma NP1 was higher in E4FAD+ (APOE4+/+/FAD+/-) relative to E4FAD- (non-carrier; APOE4+/+/FAD-/-) mice, suggesting NP1 is modulated by Aβ expression. Finally, relative to normal elderly, plasma NP1 was also elevated in patients with mild cognitive impairment (MCI) and elevated further in the subset who progressed to early-stage AD. In those patients, there was a trend towards increased NP1 levels in APOE4 carriers relative to non-carriers. These findings indicate that NP1 may represent a potential synapse-derived plasma biomarker relevant to early alterations in excitatory synapses in MCI and early-stage AD.
Collapse
Affiliation(s)
- Qiu-Lan Ma
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, United States; Veterans Affairs Greater Los Angeles Healthcare System, United States.
| | - Edmond Teng
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, United States; Veterans Affairs Greater Los Angeles Healthcare System, United States
| | - Xiaohong Zuo
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, United States; Veterans Affairs Greater Los Angeles Healthcare System, United States
| | - Mychica Jones
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, United States; Veterans Affairs Greater Los Angeles Healthcare System, United States
| | - Bruce Teter
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, United States; Veterans Affairs Greater Los Angeles Healthcare System, United States
| | - Evan Y Zhao
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, United States; Veterans Affairs Greater Los Angeles Healthcare System, United States
| | - Cansheng Zhu
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, United States; Department of Neurology, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Tina Bilousova
- School of Nursing, University of California, Los Angeles, United States
| | - Karen H Gylys
- School of Nursing, University of California, Los Angeles, United States
| | - Liana G Apostolova
- Departments of Neurology, Radiology, and Medical and Molecular Genetics, Indiana University School of Medicine, United States
| | - Mary Jo LaDu
- Department of Anatomy and Cell Biology, University of Illinois at Chicago, United States
| | - Mir Ahamed Hossain
- The Johns Hopkins University School of Medicine, The Kennedy Krieger Institute, United States
| | - Sally A Frautschy
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, United States; Veterans Affairs Greater Los Angeles Healthcare System, United States
| | - Gregory M Cole
- Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, United States; Veterans Affairs Greater Los Angeles Healthcare System, United States.
| |
Collapse
|
18
|
Qu Z, D'Mello SR. Proteomic analysis identifies NPTX1 and HIP1R as potential targets of histone deacetylase-3-mediated neurodegeneration. Exp Biol Med (Maywood) 2018; 243:627-638. [PMID: 29486577 DOI: 10.1177/1535370218761149] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
A defining feature of neurodegenerative diseases is the abnormal and excessive loss of neurons. One molecule that is particularly important in promoting neuronal death in a variety of cell culture and in vivo models of neurodegeneration is histone deacetylase-3 (HDAC3), a member of the histone deacetylase family of proteins. As a step towards understanding how HDAC3 promotes neuronal death, we conducted a proteomic screen aimed at identifying proteins that were regulated by HDAC3. HDAC3 was overexpressed in cultured rat cerebellar granule neurons (CGNs) and protein lysates were analyzed by mass spectrometry. Of over 3000 proteins identified in the screen, only 21 proteins displayed a significant alteration in expression. Of these, 12 proteins were downregulated whereas 9 proteins were upregulated. The altered expression of five of these proteins, TEX10, NPTX1, TFG, TSC1, and NFL, along with another protein that was downregulated in the proteomic screen, HIP1R, was confirmed using Western blots and commercially available antibodies. Because antibodies were not available for some of the proteins and since HDAC3 is a transcriptional regulator of gene expression, we conducted RT-PCR analysis to confirm expression changes. In separate analyses, we also included other proteins that are known to regulate neurodegeneration, including HDAC9, HSF1, huntingtin, GAPDH, FUS, and p65/RELA. Based on our proteomic screen and candidate protein approach, we identify three genes, Nptx1, Hip1r, and Hdac9, all known to regulate neurodegeneration that are robustly regulated by HDAC3. Given their suggested roles in regulating neuronal death, these genes are likely to be involved in regulating HDAC3-mediated neurotoxicity. Impact statement Neurodegenerative diseases are a major medical, social, and economic problem. Recent studies by several laboratories have indicated that histone deacetylase-3 (HDAC3) plays a key role in promoting neuronal death. But the downstream mediators of HDAC3 neurotoxicity have yet to be identified. We conducted a proteomic screen to identify HDAC3 targets the results of which have been described in this report. Briefly, we identify Nptx1, Hip1r, and Hdac9 as genes whose expression is altered by HDAC3. Investigating how these genes are involved in HDAC3 neurotoxicity could shed valuable insight into neurodegenerative disease and identify molecules that can be targeted to treat these devastating disorders.
Collapse
Affiliation(s)
- Zhe Qu
- Department of Biological Sciences, Southern Methodist University, Dallas, TX 75275, USA
| | - Santosh R D'Mello
- Department of Biological Sciences, Southern Methodist University, Dallas, TX 75275, USA
| |
Collapse
|
19
|
Peng X, Pan K, Zhao W, Zhang J, Yuan S, Wen X, Zhou W, Yu Z. NPTX1 inhibits colon cancer cell proliferation through down-regulating cyclin A2 and CDK2 expression. Cell Biol Int 2018; 42:589-597. [PMID: 29345391 DOI: 10.1002/cbin.10935] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2017] [Accepted: 01/13/2018] [Indexed: 01/06/2023]
Affiliation(s)
- Xiaofeng Peng
- Department of Pathology; Huizhou First Hospital; Huizhou People's Republic of China
| | - Kangming Pan
- Department of Hepatobiliary Surgery; The First Affiliated Hospital of Sun Yat-sen University; Guangzhou People's Republic of China
| | - Wenli Zhao
- Department of Pathology; Huizhou First Hospital; Huizhou People's Republic of China
| | - Jianzhu Zhang
- Department of Pathology; Huizhou First Hospital; Huizhou People's Republic of China
| | - Shicheng Yuan
- Department of Pathology; Huizhou First Hospital; Huizhou People's Republic of China
| | - Xiang Wen
- Department of Pathology; Huizhou First Hospital; Huizhou People's Republic of China
| | - Wenquan Zhou
- Department of Pathology; Huizhou First Hospital; Huizhou People's Republic of China
| | - Zhijin Yu
- Department of Gastroenterology; Huizhou Municipal Central Hospital; Huizhou People's Republic of China
| |
Collapse
|
20
|
Ruan X, Chen T, Wang X, Li Y. Suxiao Jiuxin Pill protects cardiomyocytes against mitochondrial injury and alters gene expression during ischemic injury. Exp Ther Med 2017; 14:3523-3532. [PMID: 29042943 PMCID: PMC5639384 DOI: 10.3892/etm.2017.4964] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Accepted: 06/16/2017] [Indexed: 12/11/2022] Open
Abstract
Suxiao Jiuxin Pill (SX), a traditional Chinese medicine compound consisting primarily of tetramethylpyrazine and borneol, has been reported to protect against ischemic heart disease. However, the effects of SX on mitochondrial injury and gene expression in various signaling pathways are unclear. The aim of the present study was to investigate the effects of SX on mitochondrial injury and to screen the expression of genes potentially altered by SX using a cell culture model of ischemic injury. Simulated ischemia was established by culturing HL-1 cardiomyocytes in Dulbecco's modified Eagle medium without glucose or serum in a hypoxic chamber containing 95% N2 and 5% CO2 for 24 h. HL-1 cardiomyocytes were divided into 3 groups: Control, ischemic injury and ischemic injury + SX (100 µg/ml; n=3 wells/group). Mitochondrial membrane potential was detected by staining with JC-1 dye. The mRNA expression levels of adenylyl cyclase (Adcy) 1–9, adrenoceptor β1, Akt1, ATPase Na+/K+ transporting subunit β2, calcium voltage-gated channel auxiliary subunit α2δ (Cacna2d)2, Cacna2d3, calcium channel voltage-dependent γ subunit 8, cytochrome C oxidase subunit 6A2 (Cox6a2), fibroblast growth factor receptor (Fgfr) 4, Fgf8, Fgf12, Gnas complex locus, glycogen synthase kinase 3β (Gsk3b), mitogen-activated protein kinase (Mapk)11-14, Mapk kinase kinase kinase 1 (Map4k1), Mas1, nitric oxide synthase 3 (Nos3), phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit α (Pik3ca), phospholipase A2 group 4A, rap guanine nucleotide exchange factor 4 and ryanodine receptor 2 were detected using reverse transcription-quantitative polymerase chain reaction. The protein expression levels of phosphoinositide 3-kinase (PI3K), MAS-1 and phosphorylated-endothelial NOS were also examined by immunofluorescence staining. The decrease in mitochondrial membrane potential in the cell culture model of ischemic injury (P<0.001) was significantly attenuated by SX treatment (P<0.001). Furthermore, increases in the mRNA expression levels of Adcy2 (P<0.05), 3 (P<0.01) and 8 (P<0.05) in the ischemic injury model were significantly attenuated by SX treatment (P<0.01), and SX treatment significantly decreased the mRNA expression levels of Adcy1 (P<0.01) and 6 (P<0.05) in ischemic cells. Decreases in the mRNA expression levels of Cox6a2 (P<0.001), Gsk3b (P<0.01) and Pik3ca (P<0.001) in the ischemic injury model were also significantly attenuated by SX treatment (P<0.05, P<0.01 and P<0.001, respectively). In addition, the decrease in the protein expression of PI3K (P<0.001) was significantly attenuated by SX treatment (P<0.001). The present findings indicate that SX may protect cardiomyocytes against mitochondrial injury and attenuate alterations in the gene expression of Adcy2, 3 and 8, Cox6a2, Gsk3b and Pik3ca during ischemic injury.
Collapse
Affiliation(s)
- Xiaofen Ruan
- Cardiovascular Department, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P.R. China
| | - Tiejun Chen
- Cardiovascular Department, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P.R. China
| | - Xiaolong Wang
- Cardiovascular Department, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P.R. China
| | - Yiping Li
- Cardiovascular Department, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P.R. China
| |
Collapse
|
21
|
Hooper AWM, Alamilla JF, Venier RE, Gillespie DC, Igdoura SA. Neuronal pentraxin 1 depletion delays neurodegeneration and extends life in Sandhoff disease mice. Hum Mol Genet 2017; 26:661-673. [PMID: 28007910 DOI: 10.1093/hmg/ddw422] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 12/09/2016] [Indexed: 01/15/2023] Open
Abstract
GM2 gangliosidoses are a group of lysosomal storage disorders which include Sandhoff disease and Tay-Sachs disease. Dysregulation of glutamate receptors has been recently postulated in the pathology of Sandhoff disease. Glutamate receptor association with neuronal pentraxins 1 and 2, and the neuronal pentraxin receptor facilitates receptor potentiation and synaptic shaping. In this study, we have observed an upregulation of a novel form of neuronal pentraxin 1 (NP1-38) in the brains of a mouse model of Sandhoff disease and Tay-Sachs disease. In order to determine the impact of NP1 on the pathophysiology of Sandhoff disease mouse models, we have generated an Np1-/-Hexb-/- double knockout mouse, and observed extended lifespan, improved righting reflex and enhanced body condition relative to Hexb-/- mice, with no effect on gliosis or apoptotic markers in the CNS. Sandhoff mouse brain slices reveals a reduction in AMPA receptor-mediated currents, and increased variability in total glutamate currents in the CA1 region of the hippocampus; Np1-/-Hexb-/- mice show a correction of this phenotype, suggesting NP1-38 may be interfering with glutamate receptor function. Indeed, some of the psychiatric aspects of Sandhoff and Tay-Sachs disease (particularly late onset) may be attributed to a dysfunctional hippocampal glutamatergic system. Our work highlights a potential role for synaptic proteins, such as NP1 and glutamate receptors in lysosomal storage diseases.
Collapse
Affiliation(s)
| | | | | | | | - Suleiman A Igdoura
- Department of Biology.,Department of Pathology and Molecular Medicine, McMaster University, Hamilton, ON L8S 4L8, Canada
| |
Collapse
|
22
|
Zhao P, Chang RY, Liu N, Wang J, Zhou R, Qi X, Liu Y, Ma L, Niu Y, Sun T, Li YX, He YP, Yu JQ. Neuroprotective Effect of Oxysophocarpine by Modulation of MAPK Pathway in Rat Hippocampal Neurons Subject to Oxygen-Glucose Deprivation and Reperfusion. Cell Mol Neurobiol 2017; 38:529-540. [PMID: 28488010 DOI: 10.1007/s10571-017-0501-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2017] [Accepted: 05/03/2017] [Indexed: 12/19/2022]
Abstract
Oxysophocarpine (OSC), an alkaloid isolated from Sophora flavescens Ait, has been traditionally used as a medicinal agent based on the observed pharmacological effects. In this study, the direct effect of OSC against neuronal injuries induced by oxygen and glucose deprivation (OGD) in neonatal rat primary-cultured hippocampal neurons and its mechanisms were investigated. Cultured hippocampal neurons, which were exposed to OGD for 2 h followed by a 24 h reoxygenation, were used as an in vitro model of ischemia and reperfusion. 2-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and lactate dehydrogenase (LDH) assay were used to confirm neural damage and to further evaluate the protective effects of OSC. The concentration of intracellular-free calcium [Ca2+]i and mitochondrial membrane potential (MMP) were measured to determine the intracellular mechanisms and to further estimate the degree of neuronal damage. Changes in expression of tumor necrosis factor-α (TNF-α), interleukin (IL)-1β, p-ERK1/2, p-JNK1/2, and p-p38 MAPK were also observed in the in vitro model. It was shown that OSC (0.8, 2, or 5 µmol/L) significantly attenuated the increased absorbance of MTT, and the release of LDH manifests the neuronal damage by the OGD/R. Meanwhile, the pretreatment of the neurons during the reoxygenation period with OSC significantly increased MMP; it also inhibited [Ca2+]i the elevation in a dose-dependent manner. Furthermore, the pretreatment with OSC (0.8, 2, or 5 µmol/L) significantly down-regulated expressions of IL-1β, TNF-α, p-ERK1/2, p-JNK1/2, and p-p38 MAPK in neonatal rat primary-cultured hippocampal neurons induced by OGD/R injury. In conclusion, OSC displays a protective effect on OGD-injured hippocampal neurons by attenuating expression of inflammatory factors via down-regulated the MAPK signaling pathway.
Collapse
Affiliation(s)
- Peng Zhao
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, 750004, China
| | - Ren-Yuan Chang
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, 750004, China
- Pharmacy Department of Yulin First Hospital, Shaanxi, China
| | - Ning Liu
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, 750004, China
| | - Jing Wang
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, 750004, China
| | - Ru Zhou
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, 750004, China
| | - Xue Qi
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, 750004, China
| | - Yue Liu
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, 750004, China
| | - Lin Ma
- Key Laboratory of Craniocerebral Diseases of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
| | - Yang Niu
- Key Laboratory of Hui Ethnic Medicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan, China
| | - Tao Sun
- Key Laboratory of Craniocerebral Diseases of Ningxia Hui Autonomous Region, Ningxia Medical University, Yinchuan, China
| | - Yu-Xiang Li
- College of Nursing, Ningxia Medical University, Yinchuan, China
| | - Yan-Ping He
- General Hospital of Ningxia Medical University, 804 Shengli Street, Yinchuan, 750004, China.
| | - Jian-Qiang Yu
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, 1160 Shengli Street, Yinchuan, 750004, China.
- Ningxia Hui Medicine Modern Engineering Research Center, Ningxia Medical University, Yinchuan, China.
| |
Collapse
|
23
|
Ray L, Pal MK, Ray RS. Synergism of co-delivered nanosized antioxidants displayed enhanced anticancer efficacy in human colon cancer cell lines. Bioact Mater 2017; 2:82-95. [PMID: 29744415 PMCID: PMC5935044 DOI: 10.1016/j.bioactmat.2017.02.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Revised: 02/24/2017] [Accepted: 02/25/2017] [Indexed: 12/24/2022] Open
Abstract
Combination of chemopreventive and/or therapeutic agents is the imminent smart approach to cope up with cancer because it may act on multiple targets through different pathways. In the present study, we have synthesized multiple chemopreventive and/or therapeutic agents (Curcumin, Quercetin and Aspirin) loaded nanoparticles by simple cation-anion interaction among the amine groups of chitosan (CS) and phosphate groups of sodium hexametaphosphate (SHMP). These nanosized bioactive materials (CS-SHMP-CQA-NPs) were well characterized and found most effective in colon cancer cell line (HCT-116) compared to other cancer cell lines. Triplex chemopreventive and/or therapeutic agents-loaded NPs were synergistically inducing apoptosis in HCT-116 cells compared to two-chemopreventive agents-loaded NPs as evident by an increase in sub-G1 cells (percent), and chromatin condensation along with the decrease in mitochondrial membrane potential (MMP). Interestingly, Chou–Talalay analysis revealed that CS-SHMP-CQA-NPs showed strong synergistic effect in its all doses. Thus, our study demonstrates that nanoparticles based bioactive materials significantly inhibit the growth of HCT-116 cells and thus could be a promising approach for colon cancer chemoprevention. Multiple antioxidants loaded nanoparticle base bioactive materials have been synthesized. This nanoparticular bioactive materials (CS-SHMP-CQA-NPs) were well characterized and found most effective in colon cancer cell line (HCT-116) compared to other cancer cell lines. Nanosized bioactivematerial inhibited HCT-116 cells synergistically, could be a promising approach for colon cancer chemotherapy.
Collapse
Affiliation(s)
- Lipika Ray
- CSIR-Indian Institute of Toxicology Research, P.O. Box No. 80, M.G. Marg, Lucknow, UP, 226001, India
| | - Manish Kumar Pal
- CSIR-Indian Institute of Toxicology Research, P.O. Box No. 80, M.G. Marg, Lucknow, UP, 226001, India
| | - Ratan Singh Ray
- CSIR-Indian Institute of Toxicology Research, P.O. Box No. 80, M.G. Marg, Lucknow, UP, 226001, India.,Academy of Scientific and Innovative Research, New Delhi 110001, India
| |
Collapse
|
24
|
Zook P, Pathak HB, Belinsky MG, Gersz L, Devarajan K, Zhou Y, Godwin AK, von Mehren M, Rink L. Combination of Imatinib Mesylate and AKT Inhibitor Provides Synergistic Effects in Preclinical Study of Gastrointestinal Stromal Tumor. Clin Cancer Res 2016; 23:171-180. [PMID: 27370604 DOI: 10.1158/1078-0432.ccr-16-0529] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 05/31/2016] [Accepted: 06/16/2016] [Indexed: 12/30/2022]
Abstract
PURPOSE Gastrointestinal stromal tumors (GIST) generally harbor activating mutations in the receptor tyrosine kinase KIT or in the related platelet-derived growth factor receptor alpha (PDGFRA). GIST treated with imatinib mesylate or second-line therapies that target mutant forms of these receptors generally escape disease control and progress over time. Inhibiting additional molecular targets may provide more substantial disease control. Recent studies have implicated the PI3K/AKT pathway in the survival of imatinib mesylate-resistant GIST cell lines and tumors. EXPERIMENTAL DESIGN Here, we performed in vitro and in vivo studies evaluating the novel combination of imatinib mesylate with the AKT inhibitor MK-2206 in GIST. Whole-transcriptome sequencing (WTS) of xenografts was performed to explore the molecular aspects of tumor response to this novel combination and to potentially identify additional therapeutic targets in GIST. RESULTS This drug combination demonstrated significant synergistic effects in a panel of imatinib mesylate-sensitive and -resistant GIST cell lines. Furthermore, combination therapy provided significantly greater efficacy, as measured by tumor response and animal survival, in imatinib mesylate-sensitive GIST xenografts as compared with treatment with imatinib mesylate or MK-2206 alone. WTS implicated two neural genes, brain expressed X-linked 1 and neuronal pentraxin I, whose expression was significantly upregulated in combination-treated tumors compared with tumors treated with the two monotherapies. CONCLUSIONS These studies provide strong preclinical justification for combining imatinib mesylate with an AKT inhibitor as a front-line therapy in GIST. In addition, the WTS implicated the BCL-2/BAX/BAD apoptotic pathway as a potential mechanism for this enhanced combination effect. Clin Cancer Res; 23(1); 171-80. ©2016 AACR.
Collapse
Affiliation(s)
- Phillip Zook
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Harsh B Pathak
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Martin G Belinsky
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Lawrence Gersz
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Karthik Devarajan
- Department of Biostatistics and Bioinformatics, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Yan Zhou
- Department of Biostatistics and Bioinformatics, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Andrew K Godwin
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, Kansas, USA
| | - Margaret von Mehren
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| | - Lori Rink
- Molecular Therapeutics Program, Fox Chase Cancer Center, Philadelphia, Pennsylvania, USA
| |
Collapse
|
25
|
Cui W, Zhang Y, Yang C, Sun Y, Zhang M, Wang S. Hydrogen sulfide prevents Abeta-induced neuronal apoptosis by attenuating mitochondrial translocation of PTEN. Neuroscience 2016; 325:165-74. [PMID: 27026591 DOI: 10.1016/j.neuroscience.2016.03.053] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 03/22/2016] [Accepted: 03/22/2016] [Indexed: 12/22/2022]
Abstract
Neuronal cell apoptosis is an important pathological change in Alzheimer's disease (AD). Hydrogen sulfide (H(2)S) is known to be a novel gaseous signaling molecule and a cytoprotectant in many diseases including AD. However, the molecular mechanism of the antiapoptosis activity of H(2)S in AD is not yet fully understood. The aim of the present study is to evaluate the inhibitory effects of H(2)S on Abeta (Aβ)-induced apoptosis and the molecular mechanisms underlying primary neuron cells. Our results showed that sodium hydrosulfide (NaHS), a donor of H(2)S, significantly ameliorated Aβ-induced cell apoptosis. NaHS also reversed the Aβ-induced translocation of the phosphatase and tensin homologs deleted on chromosome 10 (PTEN) from the cytosol to the mitochondria. Furthermore, H(2)S increased the level of p-AKT/AKT significantly. Interestingly, the antiapoptosis effects of H(2)S were blocked down by specific PI3K/AKT inhibitor wortmannin. In conclusion, these data indicate that H(2)S inhibits Aβ-induced neuronal apoptosis by attenuating mitochondrial translocation of PTEN and that activation of PI3K/AKT signaling pathway plays a critical role in H(2)S-mediated neuronal protection. Our findings provide a novel route into the molecular mechanisms of neuronal apoptosis in AD.
Collapse
Affiliation(s)
- Weigang Cui
- Henan Key Laboratory of Medical Tissue Regeneration, Department of Human Anatomy, Xinxiang Medical University, Xinxiang, Henan 453003, China.
| | - Yinghua Zhang
- Henan Key Laboratory of Medical Tissue Regeneration, Department of Human Anatomy, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Chenxi Yang
- Undergraduate Students of Basic Medicine School, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Yiyuan Sun
- Undergraduate Students of Basic Medicine School, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Min Zhang
- Undergraduate Students of Basic Medicine School, Xinxiang Medical University, Xinxiang, Henan 453003, China
| | - Songtao Wang
- Henan Key Laboratory of Medical Tissue Regeneration, Department of Human Anatomy, Xinxiang Medical University, Xinxiang, Henan 453003, China
| |
Collapse
|
26
|
Schatz F, Guzeloglu-Kayisli O, Arlier S, Kayisli UA, Lockwood CJ. The role of decidual cells in uterine hemostasis, menstruation, inflammation, adverse pregnancy outcomes and abnormal uterine bleeding. Hum Reprod Update 2016; 22:497-515. [PMID: 26912000 DOI: 10.1093/humupd/dmw004] [Citation(s) in RCA: 130] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Accepted: 02/01/2016] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Human pregnancy requires robust hemostasis to prevent hemorrhage during extravillous trophoblast (EVT) invasion of the decidualized endometrium, modification of spiral arteries and post-partum processes. However, decidual hemorrhage (abruption) can occur throughout pregnancy from poorly transformed spiral arteries, causing fetal death or spontaneous preterm birth (PTB), or it can promote the aberrant placentation observed in intrauterine growth restriction (IUGR) and pre-eclampsia; all leading causes of perinatal or maternal morbidity and mortality. In non-fertile cycles, the decidua undergoes controlled menstrual bleeding. Abnormal uterine bleeding (AUB) accompanying progestin-only, long-acting, reversible contraception (pLARC) accounts for most discontinuations of these safe and highly effective agents, thereby contributing to unwanted pregnancies and abortion. The aim of this study was to investigate the role of decidual cells in uterine hemostasis, menstruation, inflammation, adverse pregnancy outcomes and abnormal uterine bleeding. METHODS We conducted a critical review of the literature arising from PubMed searches up to December 2015, regarding in situ and in vitro expression and regulation of several specific proteins involved in uterine hemostasis in decidua and cycling endometrium. In addition, we discussed clinical and molecular mechanisms associated with pLARC-induced AUB and pregnancy complications with abruptions, chorioamnionitis or pre-eclampsia. RESULTS Progestin-induced decidualization of estradiol-primed human endometrial stromal cells (HESCs) increases in vivo and in vitro expression of tissue factor (TF) and type-1 plasminogen activator inhibitor (PAI-1) while inhibiting plasminogen activators (PAs), matrix metalloproteinases (MMPs), and the vasoconstrictor, endothelin-1 (ET-1). These changes in decidual cell-derived regulators of hemostasis, fibrinolysis, extracellular matrix (ECM) turnover, and vascular tone prevent hemorrhage during EVT invasion and vascular remodeling. In non-fertile cycles, progesterone withdrawal reduces TF and PAI-1 while increasing PA, MMPs and ET-1, causing menstrual-associated bleeding, fibrinolysis, ECM degradation and ischemia. First trimester decidual hemorrhage elicits later adverse outcomes including pregnancy loss, pre-eclampsia, abruption, IUGR and PTB. Decidual hemorrhage generates excess thrombin that binds to decidual cell-expressed protease-activated receptors (PARs) to induce chemokines promoting shallow placentation; such bleeding later in pregnancy generates thrombin to down-regulate decidual cell progesterone receptors and up-regulate cytokines and MMPs linked to PTB. Endometria of pLARC users display ischemia-induced excess vasculogenesis and progestin inhibition of spiral artery vascular smooth muscle cell proliferation and migration leading to dilated fragile vessels prone to bleeding. Moreover, aberrant TF-derived thrombin signaling also contributes to the pathogenesis of endometriosis via induction of angiogenesis, inflammation and cell survival. CONCLUSION Perivascular decidualized HESCs promote endometrial hemostasis during placentation yet facilitate menstruation through progestational regulation of hemostatic, proteolytic, and vasoactive proteins. Pathological endometrial hemorrhage elicits excess local thrombin generation, which contributes to pLARC associated AUB, endometriosis and adverse pregnancy outcomes through several biochemical mechanisms.
Collapse
Affiliation(s)
- Frederick Schatz
- Department of Obstetrics and Gynecology, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Ozlem Guzeloglu-Kayisli
- Department of Obstetrics and Gynecology, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Sefa Arlier
- Department of Obstetrics and Gynecology, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Umit A Kayisli
- Department of Obstetrics and Gynecology, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| | - Charles J Lockwood
- Department of Obstetrics and Gynecology, Morsani College of Medicine, University of South Florida, Tampa, FL 33612, USA
| |
Collapse
|
27
|
Chang R, Zhou R, Qi X, Wang J, Wu F, Yang W, Zhang W, Sun T, Li Y, Yu J. Protective effects of aloin on oxygen and glucose deprivation-induced injury in PC12 cells. Brain Res Bull 2016; 121:75-83. [PMID: 26772628 DOI: 10.1016/j.brainresbull.2016.01.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 12/28/2015] [Accepted: 01/04/2016] [Indexed: 01/11/2023]
Abstract
The present study aims to determine whether aloin could protect cells from ischemic and reperfusion injury in vitro and to elucidate the related mechanisms. Oxygen and glucose deprivation model in PC12 cells was used in the present study. 2-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), lactate dehydrogenase (LDH) assay and Hoechst 33342 nuclear staining were used to evaluate the protective effects of aloin, at concentrations of 10, 20, or 40 μg/mL in PC12 cells. PCR was applied to detect fluorescence caspase-3, Bax and Bcl-2 mRNA expression in PC12 cells. The contents of malondialdehyde (MDA), superoxide dismutase (SOD) activity were evaluated by biochemical method. The concentration of intracellular-free calcium [Ca(2+)]i, mitochondrial membrane potential (MMP) were determined to estimate the degree of neuronal damage. It was shown that aloin (10, 20, and 40 μg/mL) significantly attenuated PC12 cells damage with characteristics of an increased injured cells absorbance of MTT and releases of LDH, decreasing cell apoptosis, and antagonizing decreases in SOD activity and increase in MDA level induced by OGD-reoxygenation. Meanwhile pretreatment with aloin significantly reduced injury-induced intracellular ROS, increased MMP (P<0.01), but it inhibited [Ca(2+)]i (P<0.01) elevation in a dose-dependent manner. Furthermore, pre-treatment with aloin significantly up-regulated Bcl-2 mRNA expression, down-regulated Bax mRNA expression and consequently activated caspase-3 mRNA expression in a dose-dependent manner. The results indicated that the protection of aloin on OGD-induced apoptosis in PC12 cells is associated with its suppression on OGD-induced oxidative stress and protection on mitochondrial function and inhibition of caspase activity. Alion could be a promising candidate in the development of a novel class of anti-ischemic agent.
Collapse
Affiliation(s)
- Renyuan Chang
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Ru Zhou
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Xue Qi
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Jing Wang
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Fan Wu
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Wenli Yang
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Wannian Zhang
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, Yinchuan, China
| | - Tao Sun
- Ningxia Key Lab of Craniocerebral Diseases of Ningxia Hui Autonomous Region, Yinchuan, China
| | - Yuxiang Li
- College of Nursing, Ningxia Medical University, Yinchuan, China.
| | - Jianqiang Yu
- Department of Pharmacology, College of Pharmacy, Ningxia Medical University, Yinchuan, China; Ningxia Hui Medicine Modern Engineering Research Center, Ningxia Medical University, Yinchuan, China.
| |
Collapse
|
28
|
Ramírez-Sánchez J, Simões Pires EN, Nuñez-Figueredo Y, Pardo-Andreu GL, Fonseca-Fonseca LA, Ruiz-Reyes A, Ochoa-Rodríguez E, Verdecia-Reyes Y, Delgado-Hernández R, Souza DO, Salbego C. Neuroprotection by JM-20 against oxygen-glucose deprivation in rat hippocampal slices: Involvement of the Akt/GSK-3β pathway. Neurochem Int 2015; 90:215-23. [PMID: 26361722 DOI: 10.1016/j.neuint.2015.09.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 09/03/2015] [Accepted: 09/04/2015] [Indexed: 12/25/2022]
Abstract
Cerebral ischemia is the third most common cause of death and a major cause of disability worldwide. Beyond a shortage of essential metabolites, ischemia triggers many interconnected pathophysiological events, including excitotoxicity, oxidative stress, inflammation and apoptosis. Here, we investigated the neuroprotective mechanisms of JM-20, a novel synthetic molecule, focusing on the phosphoinositide-3-kinase (PI3K)/Akt survival pathway and glial cell response as potential targets of JM-20. For this purpose, we used organotypic hippocampal slice cultures exposed to oxygen-glucose deprivation (OGD) to achieve ischemic/reperfusion damage in vitro. Treatment with JM-20 at 0.1 and 10 μM reduced PI incorporation (indicative of cell death) after OGD. OGD decreased the phosphorylation of Akt (pro-survival) and GSK 3β (pro-apoptotic), resulting in respective inhibition and activation of these proteins. Treatment with JM20 prevented the reduced phosphorylation of these proteins after OGD, representing a shift from pro-apoptotic to pro-survival signaling. The OGD-induced activation of caspase-3 was also attenuated by JM-20 treatment at 10 μM. Moreover, in cultures treated with JM-20 and exposed to OGD conditioning, we observed a decrease in activated microglia, as well as a decrease in interleukin (IL)-1β, IL-6 and tumor necrosis factor (TNF)-α release into the culture medium, while the level of the anti-inflammatory IL-10 increased. GFAP immunostaining and IB4 labeling showed that JM-20 treatment significantly augmented GFAP immunoreactivity after OGD, when compared with cultures exposed to OGD only, suggesting the activation of astroglial cells. Our results confirm that JM-20 has a strong neuroprotective effect against ischemic injury and suggest that the mechanisms involved in this effect may include the modulation of reactive astrogliosis, as well as neuroinflammation and the anti-apoptotic cell signaling pathway.
Collapse
Affiliation(s)
- Jeney Ramírez-Sánchez
- Centro de Investigación y Desarrollo de Medicamentos, Ave 26, No. 1605 Boyeros y Puentes Grandes, CP 10600 La Habana, Cuba
| | - Elisa Nicoloso Simões Pires
- Programa de Pós-graduação em Bioquímica, Departamento de Bioquímica, ICBS, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo I, Porto Alegre, RS 90035-003, Brazil
| | - Yanier Nuñez-Figueredo
- Centro de Investigación y Desarrollo de Medicamentos, Ave 26, No. 1605 Boyeros y Puentes Grandes, CP 10600 La Habana, Cuba
| | - Gilberto L Pardo-Andreu
- Centro de Estudio para las Investigaciones y Evaluaciones Biológicas, Instituto de Farmacia y Alimentos, Universidad de La Habana, ave. 23 # 21425 e/214 y 222, La Coronela, La Lisa CP 13600, La Habana, Cuba
| | - Luis Arturo Fonseca-Fonseca
- Centro de Investigación y Desarrollo de Medicamentos, Ave 26, No. 1605 Boyeros y Puentes Grandes, CP 10600 La Habana, Cuba
| | - Alberto Ruiz-Reyes
- Laboratorio de Síntesis Orgánica de La Facultad de Química de La Universidad de La Habana, Zapata s/n entre G y Carlitos Aguirre, Vedado Plaza de la Revolución, CP 10400, La Habana, Cuba
| | - Estael Ochoa-Rodríguez
- Laboratorio de Síntesis Orgánica de La Facultad de Química de La Universidad de La Habana, Zapata s/n entre G y Carlitos Aguirre, Vedado Plaza de la Revolución, CP 10400, La Habana, Cuba
| | - Yamila Verdecia-Reyes
- Laboratorio de Síntesis Orgánica de La Facultad de Química de La Universidad de La Habana, Zapata s/n entre G y Carlitos Aguirre, Vedado Plaza de la Revolución, CP 10400, La Habana, Cuba
| | - René Delgado-Hernández
- Centro de Investigación y Desarrollo de Medicamentos, Ave 26, No. 1605 Boyeros y Puentes Grandes, CP 10600 La Habana, Cuba
| | - Diogo O Souza
- Programa de Pós-graduação em Bioquímica, Departamento de Bioquímica, ICBS, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo I, Porto Alegre, RS 90035-003, Brazil; Departamento de Bioquímica, PPG em Bioquímica, PPG em Educação em Ciência, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600 anexo, Porto Alegre, RS 90035-003, Brazil
| | - Christianne Salbego
- Programa de Pós-graduação em Bioquímica, Departamento de Bioquímica, ICBS, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600-Anexo I, Porto Alegre, RS 90035-003, Brazil; Departamento de Bioquímica, PPG em Bioquímica, PPG em Educação em Ciência, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Rua Ramiro Barcelos, 2600 anexo, Porto Alegre, RS 90035-003, Brazil.
| |
Collapse
|
29
|
Rajkumar AP, Christensen JH, Mattheisen M, Jacobsen I, Bache I, Pallesen J, Grove J, Qvist P, McQuillin A, Gurling HM, Tümer Z, Mors O, Børglum AD. Analysis of t(9;17)(q33.2;q25.3) chromosomal breakpoint regions and genetic association reveals novel candidate genes for bipolar disorder. Bipolar Disord 2015; 17:205-11. [PMID: 25053281 DOI: 10.1111/bdi.12239] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 04/29/2014] [Indexed: 01/08/2023]
Abstract
OBJECTIVES Breakpoints of chromosomal abnormalities facilitate identification of novel candidate genes for psychiatric disorders. Genome-wide significant evidence supports the linkage between chromosome 17q25.3 and bipolar disorder (BD). Co-segregation of translocation t(9;17)(q33.2;q25.3) with psychiatric disorders has been reported. We aimed to narrow down these chromosomal breakpoint regions and to investigate the associations between single nucleotide polymorphisms within these regions and BD as well as schizophrenia (SZ) in large genome-wide association study samples. METHODS We cross-linked Danish psychiatric and cytogenetic case registers to identify an individual with both t(9;17)(q33.2;q25.3) and BD. Fluorescent in situ hybridization was employed to map the chromosomal breakpoint regions of this proband. We accessed the Psychiatric Genomics Consortium BD (n = 16,731) and SZ (n = 21,856) data. Genetic associations between these disorders and single nucleotide polymorphisms within these breakpoint regions were analysed by BioQ, FORGE, and RegulomeDB programmes. RESULTS Four protein-coding genes [coding for (endonuclease V (ENDOV), neuronal pentraxin I (NPTX1), ring finger protein 213 (RNF213), and regulatory-associated protein of mammalian target of rapamycin (mTOR) (RPTOR)] were found to be located within the 17q25.3 breakpoint region. NPTX1 was significantly associated with BD (p = 0.004), while ENDOV was significantly associated with SZ (p = 0.0075) after Bonferroni correction. CONCLUSIONS Prior linkage evidence and our findings suggest NPTX1 as a novel candidate gene for BD.
Collapse
Affiliation(s)
- Anto P Rajkumar
- Department of Biomedicine, Institute of Human Genetics, Aarhus University, Aarhus, Denmark; Translational Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, Risskov, Denmark; The Lundbeck Foundation Initiative for Integrative Psychiatric Research, iPSYCH, Aarhus, Denmark; Centre for Integrative Sequencing, iSEQ, Aarhus University, Aarhus, Denmark
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Thatipamula S, Al Rahim M, Zhang J, Hossain MA. Genetic deletion of neuronal pentraxin 1 expression prevents brain injury in a neonatal mouse model of cerebral hypoxia-ischemia. Neurobiol Dis 2014; 75:15-30. [PMID: 25554688 DOI: 10.1016/j.nbd.2014.12.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 12/01/2014] [Accepted: 12/18/2014] [Indexed: 12/23/2022] Open
Abstract
Neonatal hypoxic-ischemic (HI) brain injury is a leading cause of mortality and morbidity in infants and children for which there is no promising therapy at present. Previously, we reported induction of neuronal pentraxin 1 (NP1), a novel neuronal protein of the long-pentraxin family, following HI injury in neonatal brain. Here, we report that genetic deletion of NP1 expression prevents HI injury in neonatal brain. Elevated expression of NP1 was observed in neurons, not in astrocytes, of the ipsilateral cortical layers (I-IV) and in the hippocampal CA1 and CA3 areas of WT brains following hypoxia-ischemia; brain areas that developed infarcts (at 24-48 h), showed significantly increased numbers of TUNEL-(+) cells and tissue loss (at 7 days). In contrast, NP1-KO mice showed no evidence of brain infarction and tissue loss after HI. The immunofluorescence staining of brain sections with mitochondrial protein COX IV and subcellular fractionation analysis showed increased accumulation of NP1 in mitochondria, pro-death protein Bax activation and NP1 co-localization with activated caspase-3 in WT, but not in the NP1-KO brains; corroborating NP1 interactions with the mitochondria-derived pro-death pathways. Disruption of NP1 translocation to mitochondria by NP1-siRNA in primary cortical cultures significantly reduced ischemic neuronal death. NP1 was immunoprecipitated with activated Bax [6A7] proteins; HI caused increased interactions of NP1 with Bax, thereby, facilitating Bax translocation to mitochondrial and neuronal death. To further delineate the specificity of NPs, we found that NP1 but not the NP2 induction is specifically involved in brain injury mechanisms and that knockdown of NP1 only results in neuroprotection. Furthermore, live in vivo T2-weighted magnetic resonance imaging (MRI) including fractional anisotropy (FA) mapping showed no sign of delayed brain injury or tissue loss in the NP1-KO mice as compared to the WT at different post-HI periods (4-24 weeks) examined; indicating a long-term neuroprotective efficacy of NP1 gene deletion. Collectively, our results demonstrate a novel mechanism of neuronal death and predict that inhibition of NP1 expression is a promising strategy to prevent hypoxic-ischemic injury in immature brain.
Collapse
Affiliation(s)
| | - Md Al Rahim
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD 21205, USA; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Jiangyang Zhang
- Department of Radiology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA
| | - Mir Ahamed Hossain
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD 21205, USA; Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
| |
Collapse
|
31
|
Thatipamula S, Hossain MA. Critical role of extracellularly secreted neuronal pentraxin 1 in ischemic neuronal death. BMC Neurosci 2014; 15:133. [PMID: 25526743 PMCID: PMC4280030 DOI: 10.1186/s12868-014-0133-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 12/11/2014] [Indexed: 01/27/2023] Open
Abstract
Background Developing brain is highly susceptible to hypoxic-ischemic injury leading to severe neurological disabilities in surviving infants and children. Previously we reported induction of neuronal pentraxin 1 (NP1) in hypoxic-ischemic injury in neonatal brain and NP1 co-localization with the excitatory AMPA receptors GluR1 at the synaptic sites. However, how NP1 contributes to hypoxic-ischemic neuronal injury is not completely understood. Results Here we report that extracellular secretion of NP1 is required for ischemic neuronal death. Primary cortical neurons at days in vitro (DIV) 12 were subjected to oxygen glucose deprivation (OGD), an in vitro model of ischemic stroke, for different time periods (2–8 h). Oxygen glucose deprivation showed characteristic morphological changes of dying cells, OGD time-dependent induction of NP1 (2-4-fold) and increased neuronal death. In contrast, the NP1-KO cortical neurons were healthy and showed no sign of dying cells under similar conditions. NP1gene silencing by NP1-specific small interfering RNA (NP1-siRNA) protected cortical neurons from OGD-induced death. Conditioned media (CM) collected from OGD exposed WT cortical cultures caused neurotoxicity when added to a subset of DIV 12 normoxia control WT cortical cultures. In contrast, CM from OGD-exposed NP1-KO cultures did not induce cell toxicity in control WT cultures, suggesting a role for extracellular NP1 in neuronal death. However, NP1-KO neurons, which showed normal neuronal morphology and protection against OGD, sustained enhanced death following incubation with CM from WT OGD-exposed cultures. Western blot analysis of OGD exposed WT CM showed temporal increase of NP1 protein levels in the CM. Most strikingly, in contrast to NP1-KO CM, incubation of normal cortical cultures with CM from OGD exposed NP2-KO cultures showed neurotoxicity similar to that observed with CM from OGD exposed WT neuronal cultures. Western immunoblotting further confirmed the increased presence of NP1 protein in OGD-exposed NP2-KO CM. Live immunofluorescence analysis show intense cell surface clustering of NP1 with AMPA GluR1 receptors. Conclusions Collectively, our results demonstrate that extracellular release of NP1 promote hypoxic-ischemic neuronal death possibly via surface clustering with GluR1 at synaptic sites and that NP1, not its family member NP2, is involved in the neuronal death mechanisms.
Collapse
Affiliation(s)
| | - Mir Ahamed Hossain
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, 21205, USA. .,Department of Neurology, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA. .,Department of Neurology, The Kennedy Krieger Institute, 707 North Broadway, Room 400-N, MD, 21205, Baltimore, USA.
| |
Collapse
|
32
|
Guzeloglu-Kayisli O, Basar M, Shapiro JP, Semerci N, Huang JS, Schatz F, Lockwood CJ, Kayisli UA. Long-acting progestin-only contraceptives enhance human endometrial stromal cell expressed neuronal pentraxin-1 and reactive oxygen species to promote endothelial cell apoptosis. J Clin Endocrinol Metab 2014; 99:E1957-66. [PMID: 25029423 PMCID: PMC4184079 DOI: 10.1210/jc.2014-1770] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
CONTEXT Despite the absence of progesterone receptor protein in human endometrial endothelial cells (HEECs), endometria of women receiving long-acting progestin-only contraceptives (LAPCs) display reduced uterine blood flow, elevated reactive oxygen species generation, increased angiogenesis, and irregularly distributed, enlarged, fragile microvessels resulting in abnormal uterine bleeding. OBJECTIVE We propose that paracrine factors from LAPC-treated human endometrial stromal cells (HESCs) impair HEEC functions by shifting the balance between HEEC viability and death in favor of the latter. DESIGN AND SETTING Proliferation, apoptosis, and transcriptome analyses were performed in HEECs treated with conditioned medium supernatant (CMS) derived from HESCs treated with estradiol (E2) ± medroxyprogesterone acetate or etonogestrel under normoxia or hypoxia. Mass spectrometry interrogated the CMS secretome while immunostaining for neuronal pentraxin-1 (NPTX1), cleaved caspase-3, and cytochrome c was performed in cultured HEECs and paired endometria from women using LAPCs. MAIN OUTCOME HEEC apoptosis and its underlying mechanism. RESULTS HESC CMS from E2 + medroxyprogesterone acetate or E2 + etonogestrel incubations under hypoxia induced HEEC apoptosis (P < .05), whereas mass spectrometry of the CMS revealed increased NPTX1 secretion (P < .05). Endothelial cleaved caspase-3 and stromal NPTX1 immunoreactivity were significantly higher in LAPC-treated endometria (P < .001). Transcriptomics revealed AKT signaling inhibition and mitochondrial dysfunction in HEECs incubated with HESC CMS. In vitro analyses proved that CMS decreased HEEC AKT phosphorylation (P < .05) and that recombinant NPTX1 (P < .05) or NPTX1 + H2O2 (P < .001) increase HEEC apoptosis and cytosolic cytochrome c levels. CONCLUSIONS LAPC-enhanced NPTX1 secretion and reactive oxygen species generation in HESCs impair HEEC survival resulting in a loss in vascular integrity, demonstrating a novel paracrine mechanism to explain LAPC-induced abnormal uterine bleeding.
Collapse
Affiliation(s)
- O Guzeloglu-Kayisli
- Department of Obstetrics and Gynecology, the Ohio State University College of Medicine, Columbus, Ohio 43210
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Xu X, Zhang Q, Hu JY, Zhang DX, Jiang XP, Jia JZ, Zhu JC, Huang YS. Phosphorylation of DYNLT1 at serine 82 regulates microtubule stability and mitochondrial permeabilization in hypoxia. Mol Cells 2013; 36:322-32. [PMID: 24170091 PMCID: PMC3887991 DOI: 10.1007/s10059-013-0114-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2013] [Revised: 07/09/2013] [Accepted: 08/22/2013] [Indexed: 12/19/2022] Open
Abstract
Hypoxia-induced microtubule disruption and mitochondrial permeability transition (mPT) are crucial events leading to fatal cell damage and recent studies showed that microtubules (MTs) are involved in the modulation of mitochondrial function. Dynein light chain Tctex-type 1 (DYNLT1) is thought to be associated with MTs and mitochondria. Previously we demonstrated that DYNLT1 knockdown aggravates hypoxia-induced mitochondrial permeabilization, which indicates a role of DYNLT1 in hypoxic cytoprotection. But the underlying regulatory mechanism of DYNLT1 remains illusive. Here we aimed to investigate the phosphorylation alteration of DYNLT1 at serine 82 (S82) in hypoxia (1% O2). We therefore constructed recombinant adenoviruses to generate S82E and S82A mutants, used to transfect H9c2 and HeLa cell lines. Development of hypoxia-induced mPT (MMP examining, Cyt c release and mPT pore opening assay), hypoxic energy metabolism (cellular viability and ATP quantification), and stability of MTs were examined. Our results showed that phosph-S82 (S82-P) expression was increased in early hypoxia; S82E mutation (phosphomimic) aggravated mitochondrial damage, elevated the free tubulin in cytoplasm and decreased the cellular viability; S82A mutation (dephosphomimic) seemed to diminish the hypoxia-induced injury. These data suggest that DYNLT1 phosphorylation at S82 is involved in MTs and mitochondria regulation, and their interaction and cooperation contribute to the cellular hypoxic tolerance. Thus, we provide new insights into a DYNLT1 mechanism in stabilizing MTs and mitochondria, and propose a potential therapeutic target for hypoxia cytoprotective studies.
Collapse
Affiliation(s)
- Xue Xu
- School of Nursing, The Third Military Medical University, Chongqing, China
| | - Qiong Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing 400038, China
| | - Jiong-yu Hu
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing 400038, China
| | - Dong-xia Zhang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing 400038, China
| | - Xu-pin Jiang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing 400038, China
| | - jie-zhi Jia
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing 400038, China
| | - Jing-ci Zhu
- School of Nursing, The Third Military Medical University, Chongqing, China
| | - Yue-sheng Huang
- Institute of Burn Research, State Key Laboratory of Trauma, Burns and Combined Injury, Southwest Hospital, The Third Military Medical University, Chongqing 400038, China
| |
Collapse
|
34
|
Al Rahim M, Hossain MA. Genetic deletion of NP1 prevents hypoxic-ischemic neuronal death via reducing AMPA receptor synaptic localization in hippocampal neurons. J Am Heart Assoc 2013; 2:e006098. [PMID: 23525449 PMCID: PMC3603251 DOI: 10.1161/jaha.112.006098] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Trafficking of α‐amino‐3‐hydroxy‐5‐methyl‐4‐isoxazole propionic acid receptors (AMPARs) to excitatory synapses is critical to their synaptic functions. Previously, we have shown induction of neuronal pentraxin 1 (NP1) and its colocalization with AMPAR subunit GluR1 in hypoxic‐ischemic (HI) brain injury. However, the role of NP1 in mediating GluR1 surface expression, trafficking, and clustering at synapses in HI neuronal death is unclear. Methods and Results Primary hippocampal neurons, isolated from wild‐type (WT) and NP1‐knockout (C57BL/6 background) mice at DIV 12 to 14 were exposed to 2 to 8 hours of oxygen glucose deprivation (OGD)—in vitro conditions that mimic human stroke. OGD exposure resulted in time‐dependent induction of NP1 (∼4‐fold), enhanced redistribution of AMAP GluR1 receptors at excitatory synapses, and increased neuronal death. We observed a significant increase in surface and synaptic GluR1 clusters that colocalized with PSD‐95 on dendrites with a simultaneous decrease in internalized GluR1. Surface cross‐linking with BS3 showed enhanced membrane insertions of GluR1, and increased phosphorylation at Ser‐845 further supported enhanced surface availability of GluR1 after OGD. NP1 protein colocalized with GluR1 and PSD‐95, and OGD significantly increased their synaptic coclustering. Most strikingly, the genetic deletion of NP1 resulted in decreases in surface GluR1 cluster density, synaptic localization, phospho‐GluR1 (Ser‐845) levels, and neuronal death after OGD compared with WT neurons. AMPA (50 μmol/L) induced NP1 and significant cell death in WT but not in NP1−/− neurons. Conclusions Our results indicate that NP1 plays a key role in synaptic clustering of GluR1, suggesting that targeting NP1 might be a practical approach to preventing ischemic brain damage.
Collapse
Affiliation(s)
- Md Al Rahim
- Hugo W. Moser Research Institute at Kennedy Krieger, Baltimore, MD, USA
| | | |
Collapse
|