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Guan PP, Ge TQ, Wang P. As a Potential Therapeutic Target, C1q Induces Synapse Loss Via Inflammasome-activating Apoptotic and Mitochondria Impairment Mechanisms in Alzheimer's Disease. J Neuroimmune Pharmacol 2023; 18:267-284. [PMID: 37386257 DOI: 10.1007/s11481-023-10076-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 06/16/2023] [Indexed: 07/01/2023]
Abstract
C1q, the initiator of the classical pathway of the complement system, is activated during Alzheimer's disease (AD) development and progression and is especially associated with the production and deposition of β-amyloid protein (Aβ) and phosphorylated tau in β-amyloid plaques (APs) and neurofibrillary tangles (NFTs). Activation of C1q is responsible for induction of synapse loss, leading to neurodegeneration in AD. Mechanistically, C1q could activate glial cells, which results in the loss of synapses via regulation of synapse pruning and phagocytosis in AD. In addition, C1q induces neuroinflammation by inducing proinflammatory cytokine secretion, which is partially mediated by inflammasome activation. Activation of inflammasomes might mediate the effects of C1q on induction of synapse apoptosis. On the other hand, activation of C1q impairs mitochondria, which hinders the renovation and regeneration of synapses. All these actions of C1q contribute to the loss of synapses during neurodegeneration in AD. Therefore, pharmacological, or genetic interventions targeting C1q may provide potential therapeutic strategies for combating AD.
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Affiliation(s)
- Pei-Pei Guan
- College of Life and Health Sciences, Northeastern University, 110819, Shenyang, People's Republic of China
| | - Tong-Qi Ge
- College of Life and Health Sciences, Northeastern University, 110819, Shenyang, People's Republic of China
| | - Pu Wang
- College of Life and Health Sciences, Northeastern University, 110819, Shenyang, People's Republic of China.
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2
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Zhang M, Wang ZZ, Chen NH. Connexin 43 Phosphorylation: Implications in Multiple Diseases. Molecules 2023; 28:4914. [PMID: 37446576 DOI: 10.3390/molecules28134914] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 06/16/2023] [Accepted: 06/20/2023] [Indexed: 07/15/2023] Open
Abstract
Connexin 43 (Cx43) is most widely distributed in mammals, especially in the cardiovascular and nervous systems. Its phosphorylation state has been found to be regulated by the action of more than ten kinases and phosphatases, including mitogen-activated protein kinase/extracellular signaling and regulating kinase signaling. In addition, the phosphorylation status of different phosphorylation sites affects its own synthesis and assembly and the function of the gap junctions (GJs) to varying degrees. The phosphorylation of Cx43 can affect the permeability, electrical conductivity, and gating properties of GJs, thereby having various effects on intercellular communication and affecting physiological or pathological processes in vitro and in vivo. Therefore, clarifying the relationship between Cx43 phosphorylation and specific disease processes will help us better understand the disease. Based on the above clinical and preclinical findings, we present in this review the functional significance of Cx43 phosphorylation in multiple diseases and discuss the potential of Cx43 as a drug target in Cx43-related disease pathophysiology, with an emphasis on the importance of connexin 43 as an emerging therapeutic target in cardiac and neuroprotection.
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Affiliation(s)
- Meng Zhang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica & Neuroscience Center, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China
| | - Zhen-Zhen Wang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica & Neuroscience Center, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China
| | - Nai-Hong Chen
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica & Neuroscience Center, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100050, China
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3
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Andrés-Benito P, Íñigo-Marco I, Brullas M, Carmona M, del Rio JA, Fernández-Irigoyen J, Santamaría E, Povedano M, Ferrer I. Proteostatic modulation in brain aging without associated Alzheimer's disease-and age-related neuropathological changes. Aging (Albany NY) 2023; 15:3295-3330. [PMID: 37179123 PMCID: PMC10449282 DOI: 10.18632/aging.204698] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2023] [Accepted: 04/17/2023] [Indexed: 05/15/2023]
Abstract
AIMS (Phospho)proteomics of old-aged subjects without cognitive or behavioral symptoms, and without AD-neuropathological changes and lacking any other neurodegenerative alteration will increase understanding about the physiological state of human brain aging without associate neurological deficits and neuropathological lesions. METHODS (Phospho)proteomics using conventional label-free- and SWATH-MS (Sequential window acquisition of all theoretical fragment ion spectra mass spectrometry) has been assessed in the frontal cortex (FC) of individuals without NFTs, senile plaques (SPs) and age-related co-morbidities classified by age (years) in four groups; group 1 (young, 30-44); group 2 (middle-aged: MA, 45-52); group 3 (early-elderly, 64-70); and group 4 (late-elderly, 75-85). RESULTS Protein levels and deregulated protein phosphorylation linked to similar biological terms/functions, but involving different individual proteins, are found in FC with age. The modified expression occurs in cytoskeleton proteins, membranes, synapses, vesicles, myelin, membrane transport and ion channels, DNA and RNA metabolism, ubiquitin-proteasome-system (UPS), kinases and phosphatases, fatty acid metabolism, and mitochondria. Dysregulated phosphoproteins are associated with the cytoskeleton, including microfilaments, actin-binding proteins, intermediate filaments of neurons and glial cells, and microtubules; membrane proteins, synapses, and dense core vesicles; kinases and phosphatases; proteins linked to DNA and RNA; members of the UPS; GTPase regulation; inflammation; and lipid metabolism. Noteworthy, protein levels of large clusters of hierarchically-related protein expression levels are stable until 70. However, protein levels of components of cell membranes, vesicles and synapses, RNA modulation, and cellular structures (including tau and tubulin filaments) are markedly altered from the age of 75. Similarly, marked modifications occur in the larger phosphoprotein clusters involving cytoskeleton and neuronal structures, membrane stabilization, and kinase regulation in the late elderly. CONCLUSIONS Present findings may increase understanding of human brain proteostasis modifications in the elderly in the subpopulation of individuals not having AD neuropathological change and any other neurodegenerative change in any telencephalon region.
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Affiliation(s)
- Pol Andrés-Benito
- Neurologic Diseases and Neurogenetics Group - Bellvitge Institute for Biomedical Research (IDIBE LL), L’Hospitalet de Llobregat, Barcelona 08907, Spain
- CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, L’Hospitalet de Llobregat, Barcelona 08907, Spain
| | - Ignacio Íñigo-Marco
- Clinical Neuroproteomics Unit, Proteomics Platform, Proteored-ISCIII, Navarrabiomed, Complejo Hospitalario de Navarra (CHN), Universidad Pública de Navarra (UPNA), diSNA, Pamplona 31008, Spain
| | - Marta Brullas
- CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, L’Hospitalet de Llobregat, Barcelona 08907, Spain
- Neuropathology Group, Institute of Biomedical Research, IDIBELL, L’Hospitalet de Llobregat, Barcelona 08907, Spain
| | - Margarita Carmona
- CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, L’Hospitalet de Llobregat, Barcelona 08907, Spain
- Neuropathology Group, Institute of Biomedical Research, IDIBELL, L’Hospitalet de Llobregat, Barcelona 08907, Spain
| | - José Antonio del Rio
- CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, L’Hospitalet de Llobregat, Barcelona 08907, Spain
- Molecular and Cellular Neurobiotechnology Group, Institute of Bioengineering of Catalonia (IBEC), Barcelona Institute for Science and Technology, Science Park Barcelona (PCB), Barcelona 08028, Spain
- Department of Cell Biology, Physiology and Immunology, Faculty of Biology, University of Barcelona, Barcelona 08007, Spain
| | - Joaquín Fernández-Irigoyen
- Clinical Neuroproteomics Unit, Proteomics Platform, Proteored-ISCIII, Navarrabiomed, Complejo Hospitalario de Navarra (CHN), Universidad Pública de Navarra (UPNA), diSNA, Pamplona 31008, Spain
| | - Enrique Santamaría
- Clinical Neuroproteomics Unit, Proteomics Platform, Proteored-ISCIII, Navarrabiomed, Complejo Hospitalario de Navarra (CHN), Universidad Pública de Navarra (UPNA), diSNA, Pamplona 31008, Spain
| | - Mónica Povedano
- Neurologic Diseases and Neurogenetics Group - Bellvitge Institute for Biomedical Research (IDIBE LL), L’Hospitalet de Llobregat, Barcelona 08907, Spain
- CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, L’Hospitalet de Llobregat, Barcelona 08907, Spain
| | - Isidro Ferrer
- CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, L’Hospitalet de Llobregat, Barcelona 08907, Spain
- Neuropathology Group, Institute of Biomedical Research, IDIBELL, L’Hospitalet de Llobregat, Barcelona 08907, Spain
- Department of Pathology and Experimental Therapeutics, University of Barcelona, L’Hospitalet de Llobregat, Barcelona 08907, Spain
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Ferrer I, Andrés-Benito P, Ausín K, Cartas-Cejudo P, Lachén-Montes M, Del Rio JA, Fernández-Irigoyen J, Santamaría E. Dysregulated Protein Phosphorylation in a Mouse Model of FTLD-Tau. J Neuropathol Exp Neurol 2022; 81:696-706. [PMID: 35848963 DOI: 10.1093/jnen/nlac062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
The neocortex of P301S mice, used as a model of fronto-temporal lobar degeneration linked to tau mutation (FTLD-tau), and wild-type mice, both aged 9 months, were analyzed with conventional label-free phosphoproteomics and SWATH-MS (sequential window acquisition of all theoretical fragment ion spectra mass spectrometry) to assess the (phospho)proteomes. The total number of identified dysregulated phosphoproteins was 328 corresponding to 524 phosphorylation sites. The majority of dysregulated phosphoproteins, most of them hyperphosphorylated, were proteins of the membranes, synapses, membrane trafficking, membrane vesicles linked to endo- and exocytosis, cytoplasmic vesicles, and cytoskeleton. Another group was composed of kinases. In contrast, proteins linked to DNA, RNA metabolism, RNA splicing, and protein synthesis were hypophosphorylated. Other pathways modulating energy metabolism, cell signaling, Golgi apparatus, carbohydrates, and lipids are also targets of dysregulated protein phosphorylation in P301S mice. The present results, together with accompanying immunohistochemical and Western-blotting studies, show widespread abnormal phosphorylation of proteins, in addition to protein tau, in P301S mice. These observations point to dysregulated protein phosphorylation as a relevant contributory pathogenic component of tauopathies.
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Affiliation(s)
- Isidro Ferrer
- Department of Pathology and Experimental Therapeutics, University of Barcelona, Barcelona, Spain.,CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Bellvitge University Hospital/Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Barcelona, Spain
| | - Pol Andrés-Benito
- Department of Pathology and Experimental Therapeutics, University of Barcelona, Barcelona, Spain.,CIBERNED (Network Centre of Biomedical Research of Neurodegenerative Diseases), Institute of Health Carlos III, Barcelona, Spain.,Bellvitge University Hospital/Bellvitge Biomedical Research Institute (IDIBELL), Hospitalet de Llobregat, Barcelona, Spain
| | - Karina Ausín
- Proteomics Platform, Navarrabiomed, Hospital Universitario de Navarra (HUN), Universidad Pública de Navarra (UPNA), IdiSNA, Pamplona, Spain
| | - Paz Cartas-Cejudo
- Clinical Neuroproteomics Unit, Navarrabiomed, Hospital Universitario de Navarra (HUN), Universidad Pública de Navarra (UPNA), IdiSNA, Pamplona, Spain (PC-C, ML-M, ES)
| | - Mercedes Lachén-Montes
- Clinical Neuroproteomics Unit, Navarrabiomed, Hospital Universitario de Navarra (HUN), Universidad Pública de Navarra (UPNA), IdiSNA, Pamplona, Spain (PC-C, ML-M, ES)
| | - José Antonio Del Rio
- Molecular and Cellular Neurobiotechnology, Institute of Bioengineering of Catalonia (IBEC), Barcelona Institute for Science and Technology, Science Park Barcelona (PCB), Barcelona, Spain.,Department of Cell Biology, Physiology and Immunology, Faculty of Biology, University of Barcelona, Barcelona, Spain
| | - Joaquín Fernández-Irigoyen
- Proteomics Platform, Navarrabiomed, Hospital Universitario de Navarra (HUN), Universidad Pública de Navarra (UPNA), IdiSNA, Pamplona, Spain
| | - Enrique Santamaría
- Clinical Neuroproteomics Unit, Navarrabiomed, Hospital Universitario de Navarra (HUN), Universidad Pública de Navarra (UPNA), IdiSNA, Pamplona, Spain (PC-C, ML-M, ES)
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Whitson HE, Colton C, El Khoury J, Gate D, Goate A, Heneka MT, Kaddurah-Daouk R, Klein RS, Shinohara ML, Sisodia S, Spudich SS, Stevens B, Tanzi R, Ting JP, Garden G. Infection and inflammation: New perspectives on Alzheimer's disease. Brain Behav Immun Health 2022; 22:100462. [PMID: 36118272 PMCID: PMC9475126 DOI: 10.1016/j.bbih.2022.100462] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 04/10/2022] [Indexed: 11/24/2022] Open
Abstract
Neuroinflammation has been recognized as a component of Alzheimer's Disease (AD) pathology since the original descriptions by Alois Alzheimer and a role for infections in AD pathogenesis has long been hypothesized. More recently, this hypothesis has gained strength as human genetics and experimental data suggest key roles for inflammatory cells in AD pathogenesis. To review this topic, Duke/University of North Carolina (Duke/UNC) Alzheimer's Disease Research Center hosted a virtual symposium: "Infection and Inflammation: New Perspectives on Alzheimer's Disease (AD)." Participants considered current evidence for and against the hypothesis that AD could be caused or exacerbated by infection or commensal microbes. Discussion focused on connecting microglial transcriptional states to functional states, mouse models that better mimic human immunity, the potential involvement of inflammasome signaling, metabolic alterations, self-reactive T cells, gut microbes and fungal infections, and lessons learned from Covid-19 patients with neurologic symptoms. The content presented in the symposium, and major topics raised in discussions are reviewed in this summary of the proceedings.
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Affiliation(s)
- Heather E. Whitson
- Duke Center for the Study of Aging and Human Development, Duke University School of Medicine, Busse Bldg Rm 3502, Durham, NC, 27710, USA
- Durham VA Medical Center, Geriatric Research Education and Clinical Center, 508 Fulton Street, Durham, NC, 27705, USA
| | - Carol Colton
- Department of Neurology, Duke University School of Medicine, 3116 N Duke St, Durham, NM, 27704, USA
| | - Joseph El Khoury
- Center for Immunology & Inflammatory Diseases, Division of Infectious Diseases, Massachusetts General Hospital, 55 Fruit St, Boston, MA, 02114, USA
| | - David Gate
- The Ken & Ruth Davee Dept of Neurology, Northwestern University Feinberg School of Medicine, 303 E Chicago Ave, Ward 12-140, Chicago, IL 60611, USA
| | - Alison Goate
- Dept of Genetics and Genomic Sciences, Icahn School of Medicine at Mt. Sinai, One Gustave L. Levy Place, Box 1498, New York, NY, 10029-6574, USA
| | - Michael T. Heneka
- Dept of Neurodegenerative Disease and Geriatric Psychiatry/Neurology, University of Bonn Medical Center, Sigmund-Freud Str. 25, 53127, Bonn, Germany
| | - Rima Kaddurah-Daouk
- Dept of Psychiatry and Behavioral Sciences, Dept of Medicine, Duke Institute of Brain Sciences, Duke University School of Medicine, DUMC Box 3903, Blue Zone, South, Durham, NC, 27710, USA
| | - Robyn S. Klein
- Center for Neuroimmunology & Neuroinfectious Diseases, Depts of Medicine, Pathology & Immunology, and Neuroscience, Washington University School of Medicine, 660 S Euclid Ave, Box 8015, St. Louis, MO, 63110, USA
| | - Mari L. Shinohara
- Dept of Immunology, Duke University School of Medicine, 207 Research Dr, Box 3010, Durham, NC, 27710, USA
| | - Sangram Sisodia
- Dept of Neurobiology, University of Chicago, Abbott Memorial Hall, 947 East 58th St, MC 0928, Chicago, IL, 60637, USA
| | - Serena S. Spudich
- Dept of Neurology, Yale School of Medicine, PO Box 208018, New Haven, CT, 06520, USA
| | - Beth Stevens
- F.M. Kirby Neurobiology Center, Children's Hospital Boston, 300 Longwood Ave, Center for Life Sciences 12th Floor, Boston, MA, 02115, USA
| | - Rudolph Tanzi
- McCance Center for Brain Health, Massachusetts General Hospital, 114 16th St, Charlestown, MA, 02129, USA
| | - Jenny P. Ting
- Depts of Genetics, Microbiology and Immunology, Lineberger Comprehensive Cancer Center, Center for Translational Immunology, UNC School of Medicine, 125 Mason Farm Road, 6th Floor Marsico Hall, Chapel Hill, NC, 27599-7290, USA
| | - Gwenn Garden
- Dept of Neurology, UNC School of Medicine, Physicians Office Building, 170 Manning Drive, Campus Box 7025, Chapel Hill, NC, 27599-7025, USA
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6
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Miller-Rhodes P, Li H, Velagapudi R, Chiang W, Terrando N, Gelbard HA. URMC-099 prophylaxis prevents hippocampal vascular vulnerability and synaptic damage in an orthopedic model of delirium superimposed on dementia. FASEB J 2022; 36:e22343. [PMID: 35535564 PMCID: PMC9175136 DOI: 10.1096/fj.202200184rr] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 04/21/2022] [Accepted: 04/25/2022] [Indexed: 11/11/2022]
Abstract
Systemic perturbations can drive a neuroimmune cascade after surgical trauma, including affecting the blood-brain barrier (BBB), activating microglia, and contributing to cognitive deficits such as delirium. Delirium superimposed on dementia (DSD) is a particularly debilitating complication that renders the brain further vulnerable to neuroinflammation and neurodegeneration, albeit these molecular mechanisms remain poorly understood. Here, we have used an orthopedic model of tibial fracture/fixation in APPSwDI/mNos2-/- AD (CVN-AD) mice to investigate relevant pathogenetic mechanisms underlying DSD. We conducted the present study in 6-month-old CVN-AD mice, an age at which we speculated amyloid-β pathology had not saturated BBB and neuroimmune functioning. We found that URMC-099, our brain-penetrant anti-inflammatory neuroprotective drug, prevented inflammatory endothelial activation, breakdown of the BBB, synapse loss, and microglial activation in our DSD model. Taken together, our data link post-surgical endothelial activation, microglial MafB immunoreactivity, and synapse loss as key substrates for DSD, all of which can be prevented by URMC-099.
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Affiliation(s)
- Patrick Miller-Rhodes
- Center for Neurotherapeutics Discovery, Department of Neurology, University of Rochester Medical Center, Rochester, New York, USA.,Neuroscience Graduate Program, University of Rochester Medical Center, Rochester, New York, USA
| | - Herman Li
- Center for Neurotherapeutics Discovery, Department of Neurology, University of Rochester Medical Center, Rochester, New York, USA
| | - Ravikanth Velagapudi
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, North Carolina, USA
| | - Wesley Chiang
- Department of Biochemistry and Biophysics, University of Rochester Medical Center, Rochester, New York, USA
| | - Niccolò Terrando
- Department of Anesthesiology, Center for Translational Pain Medicine, Duke University Medical Center, Durham, North Carolina, USA.,Department of Cell Biology, Duke University Medical Center, Durham, North Carolina, USA.,Department of Immunology, Duke University Medical Center, Durham, North Carolina, USA
| | - Harris A Gelbard
- Center for Neurotherapeutics Discovery, Department of Neurology, University of Rochester Medical Center, Rochester, New York, USA.,Department of Neurology, University of Rochester Medical Center, Rochester, New York, USA.,Department of Neuroscience, University of Rochester Medical Center, Rochester, New York, USA.,Department of Pediatrics, University of Rochester Medical Center, Rochester, New York, USA.,Department of Microbiology & Immunology, University of Rochester Medical Center, Rochester, New York, USA
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7
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Chovsepian A, Berchtold D, Winek K, Mamrak U, Ramírez Álvarez I, Dening Y, Golubczyk D, Weitbrecht L, Dames C, Aillery M, Fernandez‐Sanz C, Gajewski Z, Dieterich M, Janowski M, Falkai P, Walczak P, Plesnila N, Meisel A, Pan‐Montojo F. A Primeval Mechanism of Tolerance to Desiccation Based on Glycolic Acid Saves Neurons in Mammals from Ischemia by Reducing Intracellular Calcium-Mediated Excitotoxicity. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2103265. [PMID: 34904402 PMCID: PMC8811841 DOI: 10.1002/advs.202103265] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2021] [Revised: 11/02/2021] [Indexed: 06/09/2023]
Abstract
Stroke is the second leading cause of death and disability worldwide. Current treatments, such as pharmacological thrombolysis or mechanical thrombectomy, reopen occluded arteries but do not protect against ischemia-induced damage that occurs before reperfusion or neuronal damage induced by ischemia/reperfusion. It has been shown that disrupting the conversion of glyoxal to glycolic acid (GA) results in a decreased tolerance to anhydrobiosis in Caenorhabditis elegans dauer larva and that GA itself can rescue this phenotype. During the process of desiccation/rehydration, a metabolic stop/start similar to the one observed during ischemia/reperfusion occurs. In this study, the protective effect of GA is tested in different ischemia models, i.e., in commonly used stroke models in mice and swine. The results show that GA, given during reperfusion, strongly protects against ischemic damage and improves functional outcome. Evidence that GA exerts its effect by counteracting the glutamate-dependent increase in intracellular calcium during excitotoxicity is provided. These results suggest that GA treatment has the potential to reduce mortality and disability in stroke patients.
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Affiliation(s)
- Alexandra Chovsepian
- Department of Psychiatry and PsychotherapyLudwig‐Maximilian University HospitalNussbaumstrasse. 780336MunichGermany
| | - Daniel Berchtold
- Department of NeurologyNeuroCure Clinical Research CenterCenter for Stroke ResearchCharité University MedicineCharitéplatz 110117BerlinGermany
| | - Katarzyna Winek
- Department of NeurologyNeuroCure Clinical Research CenterCenter for Stroke ResearchCharité University MedicineCharitéplatz 110117BerlinGermany
- Present address:
Present address: Edmond and Lily Safra Center for Brain SciencesHebrew University of JerusalemJerusalem9190401Israel
| | - Uta Mamrak
- Laboratory of Experimental Stroke ResearchInstitute for Stroke and Dementia Research (ISD)University of Munich Medical CenterFeodor‐Lynen‐Strasse 1781377MunichGermany
| | - Inés Ramírez Álvarez
- Department of NeurologyLudwig‐Maximilian University HospitalMarchioninstrasse. 1581377MunichGermany
- Munich Cluster for Systems Neurology (SyNergy)Ludwig‐Maximilian University Munich81377MunichGermany
| | - Yanina Dening
- Department of Psychiatry and PsychotherapyLudwig‐Maximilian University HospitalNussbaumstrasse. 780336MunichGermany
- Department of NeurologyLudwig‐Maximilian University HospitalMarchioninstrasse. 1581377MunichGermany
| | | | - Luis Weitbrecht
- Department of NeurologyNeuroCure Clinical Research CenterCenter for Stroke ResearchCharité University MedicineCharitéplatz 110117BerlinGermany
| | - Claudia Dames
- Department of NeurologyNeuroCure Clinical Research CenterCenter for Stroke ResearchCharité University MedicineCharitéplatz 110117BerlinGermany
| | - Marine Aillery
- Department of NeurologyNeuroCure Clinical Research CenterCenter for Stroke ResearchCharité University MedicineCharitéplatz 110117BerlinGermany
- Present address:
Present address: SeppicÎle‐de‐FranceLa Garenne‐Colombes92250France
| | - Celia Fernandez‐Sanz
- Department of NeurologyLudwig‐Maximilian University HospitalMarchioninstrasse. 1581377MunichGermany
- Munich Cluster for Systems Neurology (SyNergy)Ludwig‐Maximilian University Munich81377MunichGermany
- Present address:
Present address: Center for Translational MedicineDepartment of MedicineThomas Jefferson UniversityPhiladelphiaPA19107USA
| | - Zdzislaw Gajewski
- Center for Translational MedicineWarsaw University of Life SciencesWarsaw02‐787Poland
| | - Marianne Dieterich
- Department of NeurologyLudwig‐Maximilian University HospitalMarchioninstrasse. 1581377MunichGermany
- Munich Cluster for Systems Neurology (SyNergy)Ludwig‐Maximilian University Munich81377MunichGermany
| | - Miroslaw Janowski
- Program in Image Guided NeurointerventionsDepartment of Diagnostic Radiology and Nuclear MedicineUniversity of MarylandBaltimoreMD21201USA
| | - Peter Falkai
- Department of Psychiatry and PsychotherapyLudwig‐Maximilian University HospitalNussbaumstrasse. 780336MunichGermany
| | - Piotr Walczak
- Program in Image Guided NeurointerventionsDepartment of Diagnostic Radiology and Nuclear MedicineUniversity of MarylandBaltimoreMD21201USA
| | - Nikolaus Plesnila
- Laboratory of Experimental Stroke ResearchInstitute for Stroke and Dementia Research (ISD)University of Munich Medical CenterFeodor‐Lynen‐Strasse 1781377MunichGermany
- Munich Cluster for Systems Neurology (SyNergy)Ludwig‐Maximilian University Munich81377MunichGermany
| | - Andreas Meisel
- Department of NeurologyNeuroCure Clinical Research CenterCenter for Stroke ResearchCharité University MedicineCharitéplatz 110117BerlinGermany
| | - Francisco Pan‐Montojo
- Department of Psychiatry and PsychotherapyLudwig‐Maximilian University HospitalNussbaumstrasse. 780336MunichGermany
- Department of NeurologyLudwig‐Maximilian University HospitalMarchioninstrasse. 1581377MunichGermany
- Munich Cluster for Systems Neurology (SyNergy)Ludwig‐Maximilian University Munich81377MunichGermany
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8
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Bryan J, Mandan A, Kamat G, Gottschalk WK, Badea A, Adams KJ, Thompson JW, Colton CA, Mukherjee S, Lutz MW. Likelihood ratio statistics for gene set enrichment in Alzheimer's disease pathways. Alzheimers Dement 2021; 17:561-573. [PMID: 33480182 PMCID: PMC8044005 DOI: 10.1002/alz.12223] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
INTRODUCTION The study of Alzheimer's disease (AD) has revealed biological pathways with implications for disease neuropathology and pathophysiology. These pathway-level effects may also be mediated by individual characteristics or covariates such as age or sex. Evaluation of AD biological pathways in the context of interactions with these covariates is critical to the understanding of AD as well as the development of model systems used to study the disease. METHODS Gene set enrichment methods are powerful tools used to interpret gene-level statistics at the level of biological pathways. We introduce a method for quantifying gene set enrichment using likelihood ratio-derived test statistics (gsLRT), which accounts for sample covariates like age and sex. We then use our method to test for age and sex interactions with protein expression levels in AD and to compare the pathway results between human and mouse species. RESULTS Our method, based on nested logistic regressions is competitive with the existing standard for gene set testing in the context of linear models and complex experimental design. The gene sets we identify as having a significant association with AD-both with and without additional covariate interactions-are validated by previous studies. Differences between gsLRT results on mouse and human datasets are observed. DISCUSSION Characterizing biological pathways involved in AD builds on the important work involving single gene drivers. Our gene set enrichment method finds pathways that are significantly related to AD while accounting for covariates that may be relevant to disease development. The method highlights commonalities and differences between human AD and mouse models, which may inform the development of higher fidelity models for the study of AD.
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Affiliation(s)
- Jordan Bryan
- Department of Statistical Science, Duke University, Durham, NC 27708, USA
| | - Arpita Mandan
- Department of Statistical Science, Duke University, Durham, NC 27708, USA
| | - Gauri Kamat
- Department of Statistical Science, Duke University, Durham, NC 27708, USA
| | | | - Alexandra Badea
- Department of Neurology, Duke University, Durham, NC 27708, USA
| | - Kendra J. Adams
- Department of Neurology, Duke University, Durham, NC 27708, USA
| | | | - Carol A. Colton
- Department of Neurology, Duke University, Durham, NC 27708, USA
| | - Sayan Mukherjee
- Department of Statistical Science, Duke University, Durham, NC 27708, USA
- Departments of Mathematics, Computer Science, and Biostatistics & Bioinformatics, Duke University, Durham, NC 27708, USA
| | - Michael W. Lutz
- Department of Neurology, Duke University, Durham, NC 27708, USA
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9
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Yuen SC, Zhu H, Leung SW. A Systematic Bioinformatics Workflow With Meta-Analytics Identified Potential Pathogenic Factors of Alzheimer's Disease. Front Neurosci 2020; 14:209. [PMID: 32231518 PMCID: PMC7083177 DOI: 10.3389/fnins.2020.00209] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 02/25/2020] [Indexed: 12/17/2022] Open
Abstract
Potential pathogenic factors, other than well-known APP, APOE4, and PSEN, can be further identified from transcriptomics studies of differentially expressed genes (DEGs) that are specific for Alzheimer’s disease (AD), but findings are often inconsistent or even contradictory. Evidence corroboration by combining meta-analysis and bioinformatics methods may help to resolve existing inconsistencies and contradictions. This study aimed to demonstrate a systematic workflow for evidence synthesis of transcriptomic studies using both meta-analysis and bioinformatics methods to identify potential pathogenic factors. Transcriptomic data were assessed from GEO and ArrayExpress after systematic searches. The DEGs and their dysregulation states from both DNA microarray and RNA sequencing datasets were analyzed and corroborated by meta-analysis. Statistically significant DEGs were used for enrichment analysis based on KEGG and protein–protein interaction network (PPIN) analysis based on STRING. AD-specific modules were further determined by the DIAMOnD algorithm, which identifies significant connectivity patterns between specific disease-associated proteins and non-specific proteins. Within AD-specific modules, the nodes of highest degrees (>95th percentile) were considered as potential pathogenic factors. After systematic searches of 225 datasets, extensive meta-analyses among 25 datasets (21 DNA microarray datasets and 4 RNA sequencing datasets) identified 9,298 DEGs. The dysregulated genes and pathways in AD were associated with impaired amyloid-β (Aβ) clearance. From the AD-specific module, Fyn, and EGFR were the most statistically significant and biologically relevant. This meta-analytical study suggested that the reduced Aβ clearance in AD pathogenesis was associated with the genes encoding Fyn and EGFR, which were key receptors in Aβ downstream signaling.
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Affiliation(s)
- Sze Chung Yuen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Hongmei Zhu
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China
| | - Siu-Wai Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macao, China.,School of Informatics, College of Science and Engineering, University of Edinburgh, Edinburgh, United Kingdom
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10
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He JT, LI XY, Yang L, Zhao X. Astroglial connexins and cognition: memory formation or deterioration? Biosci Rep 2020; 40:BSR20193510. [PMID: 31868207 PMCID: PMC6954363 DOI: 10.1042/bsr20193510] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Revised: 11/27/2019] [Accepted: 11/29/2019] [Indexed: 01/20/2023] Open
Abstract
Connexins are the membrane proteins that form high-conductance plasma membrane channels and are the important constituents of gap junctions and hemichannels. Among different types of connexins, connexin 43 is the most widely expressed and studied gap junction proteins in astrocytes. Due to the key involvement of astrocytes in memory impairment and abundant expression of connexins in astrocytes, astroglial connexins have been projected as key therapeutic targets for Alzheimer's disease. On the other hand, the role of connexin gap junctions and hemichannels in memory formation and consolidation has also been reported. Moreover, deletion of these proteins and loss of gap junction communication result in loss of short-term spatial memory. Accordingly, both memory formation and memory deteriorating functions of astrocytes-located connexins have been documented. Physiologically expressed connexins may be involved in the memory formation, while pathologically increased expression of connexins with consequent excessive activation of astrocytes may induce neuronal injury and cognitive decline. The present review describes the memory formation as well as memory deteriorating functions of astroglial connexins in memory disorders of different etiology with possible mechanisms.
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Affiliation(s)
- Jin-Ting He
- Department of Neurology, China-Japan Union Hospital, Jilin University, Changchun, 130033, Jilin Province, China
| | - Xiao-Yan LI
- Department of Neurology, China-Japan Union Hospital, Jilin University, Changchun, 130033, Jilin Province, China
| | - Le Yang
- Department of Endocrinology, The People’s Hospital of Jilin Province, Changchun 130031, China
| | - Xin Zhao
- Department of Paediatrics, The First Hospital of Jilin University, Changchun, Jilin 130021, China
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11
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Yagensky O, Kohansal-Nodehi M, Gunaseelan S, Rabe T, Zafar S, Zerr I, Härtig W, Urlaub H, Chua JJ. Increased expression of heme-binding protein 1 early in Alzheimer's disease is linked to neurotoxicity. eLife 2019; 8:47498. [PMID: 31453805 PMCID: PMC6739868 DOI: 10.7554/elife.47498] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Accepted: 08/25/2019] [Indexed: 12/15/2022] Open
Abstract
Alzheimer’s disease is the most prevalent neurodegenerative disorder leading to progressive cognitive decline. Despite decades of research, understanding AD progression at the molecular level, especially at its early stages, remains elusive. Here, we identified several presymptomatic AD markers by investigating brain proteome changes over the course of neurodegeneration in a transgenic mouse model of AD (3×Tg-AD). We show that one of these markers, heme-binding protein 1 (Hebp1), is elevated in the brains of both 3×Tg-AD mice and patients affected by rapidly-progressing forms of AD. Hebp1, predominantly expressed in neurons, interacts with the mitochondrial contact site complex (MICOS) and exhibits a perimitochondrial localization. Strikingly, wildtype, but not Hebp1-deficient, neurons showed elevated cytotoxicity in response to heme-induced apoptosis. Increased survivability in Hebp1-deficient neurons is conferred by blocking the activation of the mitochondrial-associated caspase signaling pathway. Taken together, our data highlight a role of Hebp1 in progressive neuronal loss during AD progression.
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Affiliation(s)
- Oleksandr Yagensky
- Research Group Protein Trafficking in Synaptic Development and Function, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | | | - Saravanan Gunaseelan
- Interactomics and Intracellular Trafficking Laboratory, Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Tamara Rabe
- Department of Genes and Behavior, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany
| | - Saima Zafar
- Biomedical Engineering and Sciences Department, School of Mechanical and Manufacturing Engineering (SMME), National University of Sciences and Technology (NUST), Islamabad, Pakistan.,Clinical Dementia Center, Department of Neurology, German Center for Neurodegenerative Diseases, University Medical Center Göttingen, Göttingen, Germany
| | - Inga Zerr
- Clinical Dementia Center, Department of Neurology, German Center for Neurodegenerative Diseases, University Medical Center Göttingen, Göttingen, Germany
| | - Wolfgang Härtig
- Paul Flechsig Institute for Brain Research, University of Leipzig, Leipzig, Germany
| | - Henning Urlaub
- Research Group Bioanalytical Mass Spectrometry, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Bioanalytics Group, Institute for Clinical Chemistry, University Medical Center Göttingen, Göttingen, Germany
| | - John Je Chua
- Research Group Protein Trafficking in Synaptic Development and Function, Max Planck Institute for Biophysical Chemistry, Göttingen, Germany.,Interactomics and Intracellular Trafficking Laboratory, Department of Physiology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,LSI Neurobiology Programme, National University of Singapore, Singapore, Singapore.,Institute of Molecular and Cell Biology, Agency for Science, Technology and Research (A*STAR), Singapore, Singapore.,Institute for Health Innovation and Technology, National University of Singapore, Singapore, Singapore
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12
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Butterfield DA. Phosphoproteomics of Alzheimer disease brain: Insights into altered brain protein regulation of critical neuronal functions and their contributions to subsequent cognitive loss. Biochim Biophys Acta Mol Basis Dis 2019; 1865:2031-2039. [PMID: 31167728 PMCID: PMC6602546 DOI: 10.1016/j.bbadis.2018.08.035] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Revised: 08/22/2018] [Accepted: 08/25/2018] [Indexed: 02/07/2023]
Abstract
Alzheimer disease (AD) is the major locus of dementia worldwide. In the USA there are nearly 6 million persons with this disorder, and estimates of 13-20 million AD cases in the next three decades. The molecular bases for AD remain unknown, though processes involving amyloid beta-peptide as small oligomeric forms are gaining attention as known agents to both lead to oxidative stress and synaptic dysfunction associated with cognitive dysfunction in AD and its earlier forms, including amnestic mild cognitive impairment (MCI) and possibly preclinical Alzheimer disease (PCAD). Altered brain protein phosphorylation is a hallmark of AD, and phosphoproteomics offers an opportunity to identify these altered phosphoproteins in order to gain more insights into molecular mechanisms of neuronal dysfunction and death that lead to cognitive loss. This paper reviews what, to this author, are believed to be the known phosphoproteomics studies related to in vitro and in vivo models of AD as well as phosphoproteomics studies of brains from subjects with AD, and in at least one case in MCI and PCAD as well. The results of this review are discussed with relevance to new insights into AD brain protein dysregulation in critical neuronal functions and to potential therapeutic targets to slow, or in favorable cases, halt progression of this dementing disorder that affects millions of persons and their families worldwide.
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Affiliation(s)
- D Allan Butterfield
- Department of Chemistry and Sanders-Brown Center on Aging, University of Kentucky, Lexington, KY 40506, USA.
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13
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Lan M, Tang X, Zhang J, Yao Z. Insights in pathogenesis of multiple sclerosis: nitric oxide may induce mitochondrial dysfunction of oligodendrocytes. Rev Neurosci 2018; 29:39-53. [PMID: 28822986 DOI: 10.1515/revneuro-2017-0033] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 06/15/2017] [Indexed: 01/01/2023]
Abstract
Demyelinating diseases, such as multiple sclerosis (MS), are kinds of common diseases in the central nervous system (CNS), and originated from myelin loss and axonal damage. Oligodendrocyte dysfunction is the direct reason of demyelinating lesions in the CNS. Nitric oxide (NO) plays an important role in the pathological process of demyelinating diseases. Although the neurotoxicity of NO is more likely mediated by peroxynitrite rather than NO itself, NO can impair oligodendrocyte energy metabolism through mediating the damaging of mitochondrial DNA, mitochondrial membrane and mitochondrial respiratory chain complexes. In the progression of MS, NO can mainly mediate demyelination, axonal degeneration and cell death. Hence, in this review, we extensively discuss endangerments of NO in oligodendrocytes (OLs), which is suggested to be the main mediator in demyelinating diseases, e.g. MS. We hypothesize that NO takes part in MS through impairing the function of monocarboxylate transporter 1, especially causing axonal degeneration. Then, it further provides a new insight that NO for OLs may be a reliable therapeutic target to ameliorate the course of demyelinating diseases.
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Affiliation(s)
- Minghong Lan
- Department of Physiology, Third Military Medical University, Chongqing 400038, China
| | - Xiaoyi Tang
- Department of Physiology, Third Military Medical University, Chongqing 400038, China
| | - Jie Zhang
- Department of Physiology, Third Military Medical University, Chongqing 400038, China
| | - Zhongxiang Yao
- Department of Physiology, Third Military Medical University, Chongqing 400038, China
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14
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Zafar S, Shafiq M, Younas N, Schmitz M, Ferrer I, Zerr I. Prion Protein Interactome: Identifying Novel Targets in Slowly and Rapidly Progressive Forms of Alzheimer's Disease. J Alzheimers Dis 2018; 59:265-275. [PMID: 28671123 DOI: 10.3233/jad-170237] [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] [Indexed: 12/23/2022]
Abstract
Rapidly progressive Alzheimer's disease (rpAD) is a variant of AD distinguished by a rapid decline in cognition and short disease duration from onset to death. While attempts to identify rpAD based on biomarker profile classifications have been initiated, the mechanisms which contribute to the rapid decline and prion mimicking heterogeneity in clinical signs are still largely unknown. In this study, we characterized prion protein (PrP) expression, localization, and interactome in rpAD, slow progressive AD, and in non-dementia controls. PrP along with its interacting proteins were affinity purified with magnetic Dynabeads Protein-G, and were identified using Q-TOF-ESI/MS analysis. Our data demonstrated a significant 1.2-fold decrease in di-glycosylated PrP isoforms specifically in rpAD patients. Fifteen proteins appeared to interact with PrP and only two proteins3/4histone H2B-type1-B and zinc alpha-2 protein3/4were specifically bound with PrP isoform isolated from rpAD cases. Our data suggest distinct PrP involvement in association with the altered PrP interacting protein in rpAD, though the pathophysiological significance of these interactions remains to be established.
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Affiliation(s)
- Saima Zafar
- Department of Neurology, Clinical Dementia Center and DZNE, Georg-August University, University Medical Center Göttingen (UMG), Göttingen, Germany
| | - Mohsin Shafiq
- Department of Neurology, Clinical Dementia Center and DZNE, Georg-August University, University Medical Center Göttingen (UMG), Göttingen, Germany
| | - Neelam Younas
- Department of Neurology, Clinical Dementia Center and DZNE, Georg-August University, University Medical Center Göttingen (UMG), Göttingen, Germany
| | - Matthias Schmitz
- Department of Neurology, Clinical Dementia Center and DZNE, Georg-August University, University Medical Center Göttingen (UMG), Göttingen, Germany
| | - Isidre Ferrer
- Institute of Neuropathology, IDIBELL-University Hospital Bellvitge, University of Barcelona, Hospitalet de Llobregat, Spain.,CIBERNED (Network center for biomedical research of neurodegenerative diseases), Institute Carlos III, Ministry of Health, Spain
| | - Inga Zerr
- Department of Neurology, Clinical Dementia Center and DZNE, Georg-August University, University Medical Center Göttingen (UMG), Göttingen, Germany
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15
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Acylation of Superoxide Dismutase 1 (SOD1) at K122 Governs SOD1-Mediated Inhibition of Mitochondrial Respiration. Mol Cell Biol 2017; 37:MCB.00354-17. [PMID: 28739857 DOI: 10.1128/mcb.00354-17] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Accepted: 07/11/2017] [Indexed: 12/24/2022] Open
Abstract
In this study, we employed proteomics to identify mechanisms of posttranslational regulation on cell survival signaling proteins. We focused on Cu-Zn superoxide dismutase (SOD1), which protects cells from oxidative stress. We found that acylation of K122 on SOD1, while not impacting SOD1 catalytic activity, suppressed the ability of SOD1 to inhibit mitochondrial metabolism at respiratory complex I. We found that deacylase depletion increased K122 acylation on SOD1, which blocked the suppression of respiration in a K122-dependent manner. In addition, we found that acyl-mimicking mutations at K122 decreased SOD1 accumulation in mitochondria, initially hinting that SOD1 may inhibit respiration directly within the intermembrane space (IMS). However, surprisingly, we found that forcing the K122 acyl mutants into the mitochondria with an IMS-targeting tag did not recover their ability to suppress respiration. Moreover, we found that suppressing or boosting respiration levels toggled SOD1 in or out of the mitochondria, respectively. These findings place SOD1-mediated inhibition of respiration upstream of its mitochondrial localization. Lastly, deletion-rescue experiments show that a respiration-defective mutant of SOD1 is also impaired in its ability to rescue cells from toxicity caused by SOD1 deletion. Together, these data suggest a previously unknown interplay between SOD1 acylation, metabolic regulation, and SOD1-mediated cell survival.
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16
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Foster MW, Gwinn WM, Kelly FL, Brass DM, Valente AM, Moseley MA, Thompson JW, Morgan DL, Palmer SM. Proteomic Analysis of Primary Human Airway Epithelial Cells Exposed to the Respiratory Toxicant Diacetyl. J Proteome Res 2017; 16:538-549. [PMID: 27966365 DOI: 10.1021/acs.jproteome.6b00672] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Occupational exposures to the diketone flavoring agent, diacetyl, have been associated with bronchiolitis obliterans, a rare condition of airway fibrosis. Model studies in rodents have suggested that the airway epithelium is a major site of diacetyl toxicity, but the effects of diacetyl exposure upon the human airway epithelium are poorly characterized. Here we performed quantitative LC-MS/MS-based proteomics to study the effects of repeated diacetyl vapor exposures on 3D organotypic cultures of human primary tracheobronchial epithelial cells. Using a label-free approach, we quantified approximately 3400 proteins and 5700 phosphopeptides in cell lysates across four independent donors. Altered expression of proteins and phosphopeptides were suggestive of loss of cilia and increased squamous differentiation in diacetyl-exposed cells. These phenomena were confirmed by immunofluorescence staining of culture cross sections. Hyperphosphorylation and cross-linking of basal cell keratins were also observed in diacetyl-treated cells, and we used parallel reaction monitoring to confidently localize and quantify previously uncharacterized sites of phosphorylation in keratin 6. Collectively, these data identify numerous molecular changes in the epithelium that may be important to the pathogenesis of flavoring-induced bronchiolitis obliterans. More generally, this study highlights the utility of quantitative proteomics for the study of in vitro models of airway injury and disease.
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Affiliation(s)
| | - William M Gwinn
- National Institute of Environmental Health Sciences , Research Triangle Park, North Carolina 27709, United States
| | | | | | | | | | | | - Daniel L Morgan
- National Institute of Environmental Health Sciences , Research Triangle Park, North Carolina 27709, United States
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17
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Badea A, Kane L, Anderson RJ, Qi Y, Foster M, Cofer GP, Medvitz N, Buckley AF, Badea AK, Wetsel WC, Colton CA. The fornix provides multiple biomarkers to characterize circuit disruption in a mouse model of Alzheimer's disease. Neuroimage 2016; 142:498-511. [PMID: 27521741 DOI: 10.1016/j.neuroimage.2016.08.014] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2016] [Revised: 06/23/2016] [Accepted: 08/09/2016] [Indexed: 12/19/2022] Open
Abstract
Multivariate biomarkers are needed for detecting Alzheimer's disease (AD), understanding its etiology, and quantifying the effect of therapies. Mouse models provide opportunities to study characteristics of AD in well-controlled environments that can help facilitate development of early interventions. The CVN-AD mouse model replicates multiple AD hallmark pathologies, and we identified multivariate biomarkers characterizing a brain circuit disruption predictive of cognitive decline. In vivo and ex vivo magnetic resonance imaging (MRI) revealed that CVN-AD mice replicate the hippocampal atrophy (6%), characteristic of humans with AD, and also present changes in subcortical areas. The largest effect was in the fornix (23% smaller), which connects the septum, hippocampus, and hypothalamus. In characterizing the fornix with diffusion tensor imaging, fractional anisotropy was most sensitive (20% reduction), followed by radial (15%) and axial diffusivity (2%), in detecting pathological changes. These findings were strengthened by optical microscopy and ultrastructural analyses. Ultrastructual analysis provided estimates of axonal density, diameters, and myelination-through the g-ratio, defined as the ratio between the axonal diameter, and the diameter of the axon plus the myelin sheath. The fornix had reduced axonal density (47% fewer), axonal degeneration (13% larger axons), and abnormal myelination (1.5% smaller g-ratios). CD68 staining showed that white matter pathology could be secondary to neuronal degeneration, or due to direct microglial attack. In conclusion, these findings strengthen the hypothesis that the fornix plays a role in AD, and can be used as a disease biomarker and as a target for therapy.
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Affiliation(s)
- Alexandra Badea
- Center for In Vivo Microscopy, Duke University Medical Center, Department of Radiology, Durham, NC 27710, USA.
| | - Lauren Kane
- Trinity College of Arts & Sciences, Duke University, Durham, NC 27710, USA
| | - Robert J Anderson
- Center for In Vivo Microscopy, Duke University Medical Center, Department of Radiology, Durham, NC 27710, USA
| | - Yi Qi
- Center for In Vivo Microscopy, Duke University Medical Center, Department of Radiology, Durham, NC 27710, USA
| | - Mark Foster
- Center for In Vivo Microscopy, Duke University Medical Center, Department of Radiology, Durham, NC 27710, USA
| | - Gary P Cofer
- Center for In Vivo Microscopy, Duke University Medical Center, Department of Radiology, Durham, NC 27710, USA
| | - Neil Medvitz
- Department of Pathology, and Preston Robert Tisch Brain Tumor Center, Duke University Medical Center, Durham, NC 27710, USA
| | - Anne F Buckley
- Department of Pathology, and Preston Robert Tisch Brain Tumor Center, Duke University Medical Center, Durham, NC 27710, USA
| | - Andreas K Badea
- Center for In Vivo Microscopy, Duke University Medical Center, Department of Radiology, Durham, NC 27710, USA
| | - William C Wetsel
- Departments of Psychiatry and Behavioral Sciences, Cell Biology, and Neurobiology, Duke University Medical Center, Durham, NC 27710, USA
| | - Carol A Colton
- Department of Neurology, Duke University Medical Center, Durham, NC 27710, USA
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18
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Boyer A, Girard M, Thimmanahalli DS, Levasseur A, Céleste C, Paquet M, Duggavathi R, Boerboom D. mTOR Regulates Gap Junction Alpha-1 Protein Trafficking in Sertoli Cells and Is Required for the Maintenance of Spermatogenesis in Mice. Biol Reprod 2016; 95:13. [PMID: 27281705 PMCID: PMC5029431 DOI: 10.1095/biolreprod.115.138016] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Revised: 02/14/2016] [Accepted: 05/17/2016] [Indexed: 12/29/2022] Open
Abstract
The mammalian target of rapamycin (Mtor) gene encodes a serine/threonine kinase that acts as a master regulator of processes as diverse as cell growth, protein synthesis, cytoskeleton reorganization, and cell survival. In the testis, physiological roles for Mtor have been proposed in perinatal Sertoli cell proliferation and blood-testis barrier (BTB) remodeling during spermatogenesis, but no in vivo studies of Mtor function have been reported. Here, we used a conditional knockout approach to target Mtor in Sertoli cells. The resulting Mtor(flox/flox); Amhr2(cre/+) mice were characterized by progressive, adult-onset testicular atrophy associated with disorganization of the seminiferous epithelium, loss of Sertoli cell polarity, increased germ cell apoptosis, premature release of germ cells, decreased epididymal sperm counts, increased sperm abnormalities, and infertility. Histopathologic analysis and quantification of the expression of stage-specific markers showed a specific loss of pachytene spermatocytes and spermatids. Although the BTB and the ectoplasmic specializations did not appear to be altered in Mtor(flox/flox);Amhr2(cre/+) mice, a dramatic redistribution of gap junction alpha-1 (GJA1) was detected in their Sertoli cells. Phosphorylation of GJA1 at Ser373, which is associated with its internalization, was increased in the testes of Mtor(flox/flox); Amhr2(cre/+) mice, as was the expression and phosphorylation of AKT, which phosphorylates GJA1 at this site. Together, these results indicate that Mtor expression in Sertoli cells is required for the maintenance of spermatogenesis and the progression of germ cell development through the pachytene spermatocyte stage. One mechanism of mTOR action may be to regulate gap junction dynamics by inhibiting AKT, thereby decreasing GJA1 phosphorylation and internalization. mTOR regulates gap junction alpha-1 protein distribution in Sertoli cells and is necessary for progression through the pachytene spermatocyte stage.
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Affiliation(s)
- Alexandre Boyer
- Centre de Recherche en Reproduction Animale, Faculté de Médecine Vétérinaire, Université de Montréal, Montréal, Québec, Canada
| | - Meggie Girard
- Centre de Recherche en Reproduction Animale, Faculté de Médecine Vétérinaire, Université de Montréal, Montréal, Québec, Canada
| | | | - Adrien Levasseur
- Centre de Recherche en Reproduction Animale, Faculté de Médecine Vétérinaire, Université de Montréal, Montréal, Québec, Canada
| | - Christophe Céleste
- Centre de Recherche en Reproduction Animale, Faculté de Médecine Vétérinaire, Université de Montréal, Montréal, Québec, Canada
| | - Marilène Paquet
- Centre de Recherche en Reproduction Animale, Faculté de Médecine Vétérinaire, Université de Montréal, Montréal, Québec, Canada
| | - Rajesha Duggavathi
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, Québec, Canada
| | - Derek Boerboom
- Centre de Recherche en Reproduction Animale, Faculté de Médecine Vétérinaire, Université de Montréal, Montréal, Québec, Canada
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19
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Distler U, Kuharev J, Navarro P, Tenzer S. Label-free quantification in ion mobility–enhanced data-independent acquisition proteomics. Nat Protoc 2016; 11:795-812. [DOI: 10.1038/nprot.2016.042] [Citation(s) in RCA: 176] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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20
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Petzold A. Glial fibrillary acidic protein is a body fluid biomarker for glial pathology in human disease. Brain Res 2015; 1600:17-31. [DOI: 10.1016/j.brainres.2014.12.027] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2014] [Accepted: 12/01/2014] [Indexed: 12/20/2022]
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21
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Foster MW, Morrison LD, Todd JL, Snyder LD, Thompson JW, Soderblom EJ, Plonk K, Weinhold KJ, Townsend R, Minnich A, Moseley MA. Quantitative proteomics of bronchoalveolar lavage fluid in idiopathic pulmonary fibrosis. J Proteome Res 2015; 14:1238-49. [PMID: 25541672 DOI: 10.1021/pr501149m] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The proteomic analysis of bronchoalveolar lavage fluid (BALF) can give insight into pulmonary disease pathology and response to therapy. Here, we describe the first gel-free quantitative analysis of BALF in idiopathic pulmonary fibrosis (IPF), a chronic and fatal scarring lung disease. We utilized two-dimensional reversed-phase liquid chromatography and ion-mobility-assisted data-independent acquisition (HDMSE) for quantitation of >1000 proteins in immunodepleted BALF from the right middle and lower lobes of normal controls and patients with IPF. Among the analytes that were increased in IPF were well-described mediators of pulmonary fibrosis (osteopontin, MMP7, CXCL7, CCL18), eosinophil- and neutrophil-derived proteins, and proteins associated with fibroblast foci. For additional discovery and targeted validation, BALF was also screened by multiple reaction monitoring (MRM), using the JPT Cytokine SpikeMix library of >400 stable isotope-labeled peptides. A refined MRM assay confirmed the robust expression of osteopontin, and demonstrated, for the first time, upregulation of the pro-fibrotic cytokine, CCL24, in BALF in IPF. These results show the utility of BALF proteomics for the molecular profiling of fibrotic lung diseases and the targeted quantitation of soluble markers of IPF. More generally, this study addresses critical quality control measures that should be widely applicable to BALF profiling in pulmonary disease.
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Affiliation(s)
- Matthew W Foster
- Pulmonary, Allergy and Critical Care Medicine, ‡Duke Proteomics and Metabolomics Shared Resource, §Department of Surgery, Duke University Medical Center , Durham, North Carolina 27710, United States , and
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22
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Weerasekara VK, Panek DJ, Broadbent DG, Mortenson JB, Mathis AD, Logan GN, Prince JT, Thomson DM, Thompson JW, Andersen JL. Metabolic-stress-induced rearrangement of the 14-3-3ζ interactome promotes autophagy via a ULK1- and AMPK-regulated 14-3-3ζ interaction with phosphorylated Atg9. Mol Cell Biol 2014; 34:4379-88. [PMID: 25266655 PMCID: PMC4248729 DOI: 10.1128/mcb.00740-14] [Citation(s) in RCA: 82] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2014] [Revised: 07/05/2014] [Accepted: 09/17/2014] [Indexed: 01/19/2023] Open
Abstract
14-3-3ζ promotes cell survival via dynamic interactions with a vast network of binding partners, many of which are involved in stress regulation. We show here that hypoxia (low glucose and oxygen) triggers a rearrangement of the 14-3-3ζ interactome to favor an interaction with the core autophagy regulator Atg9A. Our data suggest that the localization of mammalian Atg9A to autophagosomes requires phosphorylation on the C terminus of Atg9A at S761, which creates a 14-3-3ζ docking site. Under basal conditions, this phosphorylation is maintained at a low level and is dependent on both ULK1 and AMPK. However, upon induction of hypoxic stress, activated AMPK bypasses the requirement for ULK1 and mediates S761 phosphorylation directly, resulting in an increase in 14-3-3ζ interactions, recruitment of Atg9A to LC3-positive autophagosomes, and enhanced autophagosome production. These data suggest a novel mechanism whereby the level of autophagy induction can be modulated by AMPK/ULK1-mediated phosphorylation of mammalian Atg9A.
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Affiliation(s)
- Vajira K Weerasekara
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, USA
| | - David J Panek
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, USA
| | - David G Broadbent
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, USA
| | - Jeffrey B Mortenson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, USA
| | - Andrew D Mathis
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, USA
| | - Gideon N Logan
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, USA
| | - John T Prince
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, USA
| | - David M Thomson
- Department of Physiology and Developmental Biology, Brigham Young University, Provo, Utah, USA
| | - J Will Thompson
- Institute for Genome Sciences and Policy, Duke University Medical Center, Durham, North Carolina, USA
| | - Joshua L Andersen
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah, USA
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Distler U, Kuharev J, Tenzer S. Biomedical applications of ion mobility-enhanced data-independent acquisition-based label-free quantitative proteomics. Expert Rev Proteomics 2014; 11:675-84. [DOI: 10.1586/14789450.2014.971114] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Abstract
Supplemental digital content is available in the text. Understanding the pathophysiologic mechanisms underlying Alzheimer disease relies on knowledge of disease onset and the sequence of development of brain pathologies. We present a comprehensive analysis of early and progressive changes in a mouse model that demonstrates a full spectrum of characteristic Alzheimer disease–like pathologies. This model demonstrates an altered immune redox state reminiscent of the human disease and capitalizes on data indicating critical differences between human and mouse immune responses, particularly in nitric oxide levels produced by immune activation of the NOS2 gene. Using the APPSwDI+/+/mNos2−/− (CVN-AD) mouse strain, we show a sequence of pathologic events leading to neurodegeneration,which include pathologically hyperphosphorylated tau in the perforant pathway at 6 weeks of age progressing to insoluble tau, early appearance of β-amyloid peptides in perivascular deposits around blood vessels in brain regions known to be vulnerable to Alzheimer disease, and progression to damage and overt loss in select vulnerable neuronal populations in these regions. The role of species differences between hNOS2 and mNos2 was supported by generating mice in which the human NOS2 gene replaced mNos2. When crossed with CVN-AD mice, pathologic characteristics of this new strain (APPSwDI+/−/HuNOS2tg+/+/mNos2−/−) mimicked the pathologic phenotypes found in the CVN-AD strain.
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25
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Suszyńska-Zajczyk J, Utyro O, Jakubowski H. Methionine-induced hyperhomocysteinemia and bleomycin hydrolase deficiency alter the expression of mouse kidney proteins involved in renal disease. Mol Genet Metab 2014; 112:339-46. [PMID: 24913063 DOI: 10.1016/j.ymgme.2014.05.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2014] [Revised: 05/18/2014] [Accepted: 05/18/2014] [Indexed: 02/07/2023]
Abstract
SCOPE Hyperhomocysteinemia (HHcy) induced by dietary or genetic factors is linked to kidney disease. Bleomycin hydrolase (Blmh) metabolizes Hcy-thiolactone to Hcy. We aimed to explain the role of dietary HHcy in kidney disease. METHODS AND RESULTS We examined kidney proteome in dietary HHcy and Blmh-knockout mouse models using 2D IEF/SDS-PAGE gel electrophoresis and MALDI-TOF mass spectrometry. We found that the kidney proteome was altered by dietary HHcy and the Blmh(-/-) genotype. Proteins involved in metabolism of lipoprotein (ApoA1), amino acid and protein (Acy1, Hspd1), carbohydrate (Pdhb, Fbp1-isoform 1, Eno1), and energy metabolism (Ndufs8, Ldhd) were down-regulated. Proteins involved in carbohydrate metabolism (Fbp1-isoform 2), oxidative stress response (Prdx2), and detoxification (Glod4) were up-regulated. The Blmh(-/-) genotype down-regulated Glod4 isoform 3 mRNA but did not affect isoform 1 mRNA expression in mouse kidneys, suggesting post-transcriptional regulation of the Glod4 protein by the Blmh(+/+) genotype. Responses of ApoA1, Acy1, Hspd1, Ndufs8, Fbp1, Eno1, and Prdx2 to HHcy and/or Blmh deficiency mimic their responses to renal disease. CONCLUSION Our findings indicate that Blmh interacts with diverse cellular processes--lipoprotein, amino acid and protein, carbohydrate, and energy metabolisms, detoxification, antioxidant defenses--that are essential for normal kidney homeostasis and that deregulation of these processes can account for the involvement of HHcy in kidney disease.
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Affiliation(s)
| | - Olga Utyro
- Institute of Bioorganic Chemistry, Poznan, Poland; Department of Biochemistry and Biotechnology, University of Life Sciences, Poznan, Poland
| | - Hieronim Jakubowski
- Institute of Bioorganic Chemistry, Poznan, Poland; Department of Biochemistry and Biotechnology, University of Life Sciences, Poznan, Poland; Department of Microbiology & Molecular Genetics, Rutgers-New Jersey Medical School, International Center for Public Health, Newark, NJ, USA.
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26
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Corradini E, Vallur R, Raaijmakers LM, Feil S, Feil R, Heck AJR, Scholten A. Alterations in the cerebellar (Phospho)proteome of a cyclic guanosine monophosphate (cGMP)-dependent protein kinase knockout mouse. Mol Cell Proteomics 2014; 13:2004-16. [PMID: 24925903 DOI: 10.1074/mcp.m113.035154] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The cyclic nucleotide cyclic guanosine monophosphate (cGMP) plays an important role in learning and memory, but its signaling mechanisms in the mammalian brain are not fully understood. Using mass-spectrometry-based proteomics, we evaluated how the cerebellum adapts its (phospho)proteome in a knockout mouse model of cGMP-dependent protein kinase type I (cGKI). Our data reveal that a small subset of proteins in the cerebellum (∼3% of the quantified proteins) became substantially differentially expressed in the absence of cGKI. More changes were observed at the phosphoproteome level, with hundreds of sites being differentially phosphorylated between wild-type and knockout cerebellum. Most of these phosphorylated sites do not represent known cGKI substrates. An integrative computational network analysis of the data indicated that the differentially expressed proteins and proteins harboring differentially phosphorylated sites largely belong to a tight network in the Purkinje cells of the cerebellum involving important cGMP/cAMP signaling nodes (e.g. PDE5 and PKARIIβ) and Ca(2+) signaling (e.g. SERCA3). In this way, removal of cGKI could be linked to impaired cerebellar long-term depression at Purkinje cell synapses. In addition, we were able to identify a set of novel putative (phospho)proteins to be considered in this network. Overall, our data improve our understanding of cerebellar cGKI signaling and suggest novel players in cGKI-regulated synaptic plasticity.
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Affiliation(s)
- Eleonora Corradini
- From ‡Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; §Netherlands Proteomics Centre, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Raghavan Vallur
- ¶Interfakultäres Institut für Biochemie, Universität Tübingen, D-72074 Tübingen, Germany; ‖Graduate School for Cellular and Molecular Neuroscience, Universität Tübingen, D-72074 Tübingen, Germany; **German Center for Neurodegenerative diseases (DZNE), D-72076 Tübingen, Germany
| | - Linsey M Raaijmakers
- From ‡Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; §Netherlands Proteomics Centre, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Susanne Feil
- ¶Interfakultäres Institut für Biochemie, Universität Tübingen, D-72074 Tübingen, Germany
| | - Robert Feil
- ¶Interfakultäres Institut für Biochemie, Universität Tübingen, D-72074 Tübingen, Germany
| | - Albert J R Heck
- From ‡Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; §Netherlands Proteomics Centre, Padualaan 8, 3584 CH Utrecht, The Netherlands;
| | - Arjen Scholten
- From ‡Biomolecular Mass Spectrometry and Proteomics, Bijvoet Center for Biomolecular Research and Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands; §Netherlands Proteomics Centre, Padualaan 8, 3584 CH Utrecht, The Netherlands;
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