1
|
Patterson JR, Kochmanski J, Stoll AC, Kubik M, Kemp CJ, Duffy MF, Thompson K, Howe JW, Cole-Strauss A, Kuhn NC, Miller KM, Nelson S, Onyekpe CU, Beck JS, Counts SE, Bernstein AI, Steece-Collier K, Luk KC, Sortwell CE. Transcriptomic profiling of early synucleinopathy in rats induced with preformed fibrils. NPJ Parkinsons Dis 2024; 10:7. [PMID: 38172128 PMCID: PMC10764951 DOI: 10.1038/s41531-023-00620-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 12/08/2023] [Indexed: 01/05/2024] Open
Abstract
Examination of early phases of synucleinopathy when inclusions are present, but long before neurodegeneration occurs, is critical to both understanding disease progression and the development of disease modifying therapies. The rat alpha-synuclein (α-syn) preformed fibril (PFF) model induces synchronized synucleinopathy that recapitulates the pathological features of Parkinson's disease (PD) and can be used to study synucleinopathy progression. In this model, phosphorylated α-syn (pSyn) inclusion-containing neurons and reactive microglia (major histocompatibility complex-II immunoreactive) peak in the substantia nigra pars compacta (SNpc) months before appreciable neurodegeneration. However, it remains unclear which specific genes are driving these phenotypic changes. To identify transcriptional changes associated with early synucleinopathy, we used laser capture microdissection of the SNpc paired with RNA sequencing (RNASeq). Precision collection of the SNpc allowed for the assessment of differential transcript expression in the nigral dopamine neurons and proximal glia. Transcripts upregulated in early synucleinopathy were mainly associated with an immune response, whereas transcripts downregulated were associated with neurotransmission and the dopamine pathway. A subset of 29 transcripts associated with neurotransmission/vesicular release and the dopamine pathway were verified in a separate cohort of males and females to confirm reproducibility. Within this subset, fluorescent in situ hybridization (FISH) was used to localize decreases in the Syt1 and Slc6a3 transcripts to pSyn inclusion-containing neurons. Identification of transcriptional changes in early synucleinopathy provides insight into the molecular mechanisms driving neurodegeneration.
Collapse
Affiliation(s)
- Joseph R Patterson
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA.
- Neuroscience Program, Michigan State University, East Lansing, MI, USA.
| | - Joseph Kochmanski
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | - Anna C Stoll
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
- Department of Pharmacology and Toxicology, Michigan State University, East Lansing, MI, USA
| | - Michael Kubik
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
- Neuroscience Program, Michigan State University, East Lansing, MI, USA
| | - Christopher J Kemp
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | - Megan F Duffy
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
- Neuroscience Program, Michigan State University, East Lansing, MI, USA
| | - Kajene Thompson
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | - Jacob W Howe
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
- Neuroscience Program, Michigan State University, East Lansing, MI, USA
| | - Allyson Cole-Strauss
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | - Nathan C Kuhn
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | - Kathryn M Miller
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
- Neuroscience Program, Michigan State University, East Lansing, MI, USA
| | - Seth Nelson
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | - Christopher U Onyekpe
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | - John S Beck
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | - Scott E Counts
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
- Neuroscience Program, Michigan State University, East Lansing, MI, USA
| | - Alison I Bernstein
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
- Department of Pharmacology and Toxicology, Rutgers University, Piscataway, NJ, USA
- Environmental and Occupational Health Science Institute, Rutgers University, Piscataway, NJ, USA
| | - Kathy Steece-Collier
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
| | - Kelvin C Luk
- Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA, USA
| | - Caryl E Sortwell
- Department of Translational Science and Molecular Medicine, Michigan State University, Grand Rapids, MI, USA
- Neuroscience Program, Michigan State University, East Lansing, MI, USA
| |
Collapse
|
2
|
Fulop T, Larbi A, Pawelec G, Cohen AA, Provost G, Khalil A, Lacombe G, Rodrigues S, Desroches M, Hirokawa K, Franceschi C, Witkowski JM. Immunosenescence and Altered Vaccine Efficiency in Older Subjects: A Myth Difficult to Change. Vaccines (Basel) 2022; 10:vaccines10040607. [PMID: 35455356 PMCID: PMC9030923 DOI: 10.3390/vaccines10040607] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2022] [Revised: 04/05/2022] [Accepted: 04/08/2022] [Indexed: 12/14/2022] Open
Abstract
Organismal ageing is associated with many physiological changes, including differences in the immune system of most animals. These differences are often considered to be a key cause of age-associated diseases as well as decreased vaccine responses in humans. The most often cited vaccine failure is seasonal influenza, but, while it is usually the case that the efficiency of this vaccine is lower in older than younger adults, this is not always true, and the reasons for the differential responses are manifold. Undoubtedly, changes in the innate and adaptive immune response with ageing are associated with failure to respond to the influenza vaccine, but the cause is unclear. Moreover, recent advances in vaccine formulations and adjuvants, as well as in our understanding of immune changes with ageing, have contributed to the development of vaccines, such as those against herpes zoster and SARS-CoV-2, that can protect against serious disease in older adults just as well as in younger people. In the present article, we discuss the reasons why it is a myth that vaccines inevitably protect less well in older individuals, and that vaccines represent one of the most powerful means to protect the health and ensure the quality of life of older adults.
Collapse
Affiliation(s)
- Tamas Fulop
- Research Center on Aging, Geriatric Division, Department of Medicine, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (A.K.); (G.L.)
- Correspondence: (T.F.); (S.R.)
| | - Anis Larbi
- Singapore Immunology Network (SIgN), Agency for Science Technology and Research (A*STAR), Immunos Building, Singapore 138648, Singapore;
| | - Graham Pawelec
- Department of Immunology, University of Tübingen, 72072 Tübingen, Germany;
- Health Sciences North Research Institute, Sudbury, ON P3E 2H2, Canada
| | - Alan A. Cohen
- Groupe de Recherche PRIMUS, Department of Family Medicine, University of Sherbrooke, 3001 12e Ave N, Sherbrooke, QC J1H 5N4, Canada;
| | | | - Abedelouahed Khalil
- Research Center on Aging, Geriatric Division, Department of Medicine, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (A.K.); (G.L.)
| | - Guy Lacombe
- Research Center on Aging, Geriatric Division, Department of Medicine, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada; (A.K.); (G.L.)
| | - Serafim Rodrigues
- Ikerbasque, The Basque Foundation for Science, 48009 Bilbao, Spain;
- BCAM—The Basque Center for Applied Mathematics, 48009 Bilbao, Spain
- Correspondence: (T.F.); (S.R.)
| | - Mathieu Desroches
- MathNeuro Team, Inria Sophia Antipolis Méditerranée, CEDEX, 06902 Sophia Antipolis, France;
- The Jean Alexandre Dieudonné Laboratory, Université Côte d’Azur, CEDEX 2, 06108 Nice, France
| | - Katsuiku Hirokawa
- Institute of Health and Life Science, Tokyo Medical and Dental University, Tokyo 113-8510, Japan;
| | - Claudio Franceschi
- IRCCS Institute of Neurological Sciences of Bologna, Alma Mater Studiorum University of Bologna, 40126 Bologna, Italy;
- Department of Applied Mathematics and Laboratory of Systems Biology of Healthy Aging, Lobachevsky State University, 603000 Nizhny Novgorod, Russia
| | - Jacek M. Witkowski
- Department of Pathophysiology, Medical University of Gdansk, 80-210 Gdansk, Poland;
| |
Collapse
|
3
|
Fülöp T, Desroches M, A Cohen A, Santos FAN, Rodrigues S. Why we should use topological data analysis in ageing: Towards defining the “topological shape of ageing”. Mech Ageing Dev 2020; 192:111390. [DOI: 10.1016/j.mad.2020.111390] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2020] [Revised: 10/17/2020] [Accepted: 10/20/2020] [Indexed: 12/26/2022]
|
4
|
Tsentsevitsky AN, Zakyrjanova GF, Petrov AM. Cadmium desynchronizes neurotransmitter release in the neuromuscular junction: Key role of ROS. Free Radic Biol Med 2020; 155:19-28. [PMID: 32445865 DOI: 10.1016/j.freeradbiomed.2020.05.017] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Revised: 05/18/2020] [Accepted: 05/18/2020] [Indexed: 12/11/2022]
Abstract
Cd2+ is one of the most widespread environmental pollutants and its accumulation in central and peripheral nervous systems leads to neurotoxicity as well as aggravation of common neurodegenerative diseases. Mechanism of the Cd2+ toxicity is far from being resolved. Here, using microelectrode recordings of postsynaptic responses and fluorescent redox indicators we studied the effect of Cd2+ in the submicromolar range on timing of neurotransmitter release and oxidative status in two functionally different compartments of the same frog motor nerve terminal. Cd2+ (0.1-1 μM) acting as typical voltage-gated Ca2+channel (VGCC) antagonist decreased neurotransmitter release in both distal and proximal parts of the nerve terminal, but in contrast to the VGCC blockers Cd2+(0.1-0.5 μM) desynchronized the release selectively in the distal region. The latter action of Cd2+ was completely prevented by inhibitor of NADPH-oxidase and antioxidants, including mitochondrial specific, as well as redox-sensitive TRPV1 channel blocker. Cd2+ markedly increased levels of mitochondrial reactive oxygen species (ROS) in both the distal and proximal compartments of the nerve terminal, which was associated with lipid peroxidation mainly in the distal region. Zn2+, whose transport systems translocate Cd2+, markedly enhanced the effects of Cd2+ on both the mitochondrial ROS levels and timing of neurotransmitter release. Furthermore, in the presence of Zn2+ ions, Cd2+ also desynchronized the neurotransmitter release in the proximal region. Thus, in synapses Cd2+ at very low concentrations can increase mitochondrial ROS, lipid peroxidation and disturb the timing of neurotransmitter release via a ROS/TRPV-dependent mechanism. Desynchronization of neurotransmitter release and synaptic oxidative stress could be early events in Cd2+ neurotoxicity.
Collapse
Affiliation(s)
- A N Tsentsevitsky
- Laboratory of Biophysics of Synaptic Processes, Kazan Institute of Biochemistry and Biophysics, Federal Research Center ''Kazan Scientific Center of RAS", 2/31 Lobachevsky Street, Box 30, Kazan, 420111, Russia
| | - G F Zakyrjanova
- Laboratory of Biophysics of Synaptic Processes, Kazan Institute of Biochemistry and Biophysics, Federal Research Center ''Kazan Scientific Center of RAS", 2/31 Lobachevsky Street, Box 30, Kazan, 420111, Russia; Institute of Neuroscience, Kazan State Medial University, 49 Butlerova Street, Kazan, 420012, Russia
| | - A M Petrov
- Laboratory of Biophysics of Synaptic Processes, Kazan Institute of Biochemistry and Biophysics, Federal Research Center ''Kazan Scientific Center of RAS", 2/31 Lobachevsky Street, Box 30, Kazan, 420111, Russia; Institute of Neuroscience, Kazan State Medial University, 49 Butlerova Street, Kazan, 420012, Russia.
| |
Collapse
|
5
|
beim Graben P, Jimenez-Marin A, Diez I, Cortes JM, Desroches M, Rodrigues S. Metastable Resting State Brain Dynamics. Front Comput Neurosci 2019; 13:62. [PMID: 31551744 PMCID: PMC6743347 DOI: 10.3389/fncom.2019.00062] [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: 05/29/2019] [Accepted: 08/23/2019] [Indexed: 12/26/2022] Open
Abstract
Metastability refers to the fact that the state of a dynamical system spends a large amount of time in a restricted region of its available phase space before a transition takes place, bringing the system into another state from where it might recur into the previous one. beim Graben and Hutt (2013) suggested to use the recurrence plot (RP) technique introduced by Eckmann et al. (1987) for the segmentation of system's trajectories into metastable states using recurrence grammars. Here, we apply this recurrence structure analysis (RSA) for the first time to resting-state brain dynamics obtained from functional magnetic resonance imaging (fMRI). Brain regions are defined according to the brain hierarchical atlas (BHA) developed by Diez et al. (2015), and as a consequence, regions present high-connectivity in both structure (obtained from diffusion tensor imaging) and function (from the blood-level dependent-oxygenation-BOLD-signal). Remarkably, regions observed by Diez et al. were completely time-invariant. Here, in order to compare this static picture with the metastable systems dynamics obtained from the RSA segmentation, we determine the number of metastable states as a measure of complexity for all subjects and for region numbers varying from 3 to 100. We find RSA convergence toward an optimal segmentation of 40 metastable states for normalized BOLD signals, averaged over BHA modules. Next, we build a bistable dynamics at population level by pooling 30 subjects after Hausdorff clustering. In link with this finding, we reflect on the different modeling frameworks that can allow for such scenarios: heteroclinic dynamics, dynamics with riddled basins of attraction, multiple-timescale dynamics. Finally, we characterize the metastable states both functionally and structurally, using templates for resting state networks (RSNs) and the automated anatomical labeling (AAL) atlas, respectively.
Collapse
Affiliation(s)
- Peter beim Graben
- Communication Engineering, Institute of Electrical Engineering and Information Science, Brandenburg University of Technology Cottbus – Senftenberg, Cottbus, Germany
| | - Antonio Jimenez-Marin
- Computational Neuroimaging Lab, BioCruces-Bizkaia Health Research Institute, Barakaldo, Spain
| | - Ibai Diez
- Department of Radiology, Gordon Center for Medical Imaging, Harvard Medical School, Massachusetts General Hospital, Boston, MA, United States
- Neurology Department, Harvard Medical School, Boston, MA, United States
- Neurotechnology Laboratory, Tecnalia Health Department, Derio, Spain
| | - Jesus M. Cortes
- Computational Neuroimaging Lab, BioCruces-Bizkaia Health Research Institute, Barakaldo, Spain
- Ikerbasque - the Basque Foundation for Science, Bilbao, Spain
- Department of Cell Biology and Histology, University of the Basque Country, Leioa, Spain
| | - Mathieu Desroches
- MathNeuro Team, Inria Sophia Antipolis Méditerranée, Valbonne, France
- Université Côte d'Azur, Nice, France
| | - Serafim Rodrigues
- Ikerbasque - the Basque Foundation for Science, Bilbao, Spain
- Mathematical, Computational and Experimental Neuroscience, Basque Center for Applied Mathematics, Bilbao, Spain
| |
Collapse
|
6
|
Mahoney JM, Mills JD, Muhlebner A, Noebels J, Potschka H, Simonato M, Kobow K. 2017 WONOEP appraisal: Studying epilepsy as a network disease using systems biology approaches. Epilepsia 2019; 60:1045-1053. [DOI: 10.1111/epi.15216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 04/17/2019] [Accepted: 04/17/2019] [Indexed: 12/15/2022]
Affiliation(s)
- John M. Mahoney
- Department of Neurological Sciences Department of Computer Science University of Vermont Larner College of Medicine Burlington Vermont
| | - James D. Mills
- Department of (Neuro)Pathology Amsterdam University Medical CenterUniversity of Amsterdam Amsterdam The Netherlands
| | - Angelika Muhlebner
- Department of (Neuro)Pathology Amsterdam University Medical CenterUniversity of Amsterdam Amsterdam The Netherlands
| | - Jeffrey Noebels
- Department of Neurology Baylor College of Medicine Houston Texas
| | - Heidrun Potschka
- Institute of Pharmacology, Toxicology, and Pharmacy Ludwig Maximilian University of Munich Munich Germany
| | - Michele Simonato
- Department of Medical Sciences University of Ferrara and School of Medicine University Vita‐Salute San Raffaele Milan Italy
| | - Katja Kobow
- Department of Neuropathology Universitätsklinikum ErlangenFriedrich‐Alexander University Erlangen‐Nürnberg Erlangen Germany
| |
Collapse
|
7
|
Hamel É, Labib R. Modeling biological refractory periods and synaptic depression in an artificial neuron. Biomed Phys Eng Express 2019. [DOI: 10.1088/2057-1976/ab00a0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
8
|
Chauhan AS, Taylor JD, Nogaret A. Dual Mechanism for the Emergence of Synchronization in Inhibitory Neural Networks. Sci Rep 2018; 8:11431. [PMID: 30061738 PMCID: PMC6065321 DOI: 10.1038/s41598-018-29822-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2017] [Accepted: 07/16/2018] [Indexed: 11/16/2022] Open
Abstract
During cognitive tasks cortical microcircuits synchronize to bind stimuli into unified perception. The emergence of coherent rhythmic activity is thought to be inhibition-driven and stimulation-dependent. However, the exact mechanisms of synchronization remain unknown. Recent optogenetic experiments have identified two neuron sub-types as the likely inhibitory vectors of synchronization. Here, we show that local networks mimicking the soma-targeting properties observed in fast-spiking interneurons and the dendrite-projecting properties observed in somatostatin interneurons synchronize through different mechanisms which may provide adaptive advantages by combining flexibility and robustness. We probed the synchronization phase diagrams of small all-to-all inhibitory networks in-silico as a function of inhibition delay, neurotransmitter kinetics, timings and intensity of stimulation. Inhibition delay is found to induce coherent oscillations over a broader range of experimental conditions than high-frequency entrainment. Inhibition delay boosts network capacity (ln2)−N-fold by stabilizing locally coherent oscillations. This work may inform novel therapeutic strategies for moderating pathological cortical oscillations.
Collapse
Affiliation(s)
- Ashok S Chauhan
- Department of Physics, University of Bath, Bath, BA2 7AY, UK
| | - Joseph D Taylor
- Department of Physics, University of Bath, Bath, BA2 7AY, UK
| | - Alain Nogaret
- Department of Physics, University of Bath, Bath, BA2 7AY, UK.
| |
Collapse
|
9
|
Khan AI, Liu J, Dutta P. Iron transport kinetics through blood-brain barrier endothelial cells. Biochim Biophys Acta Gen Subj 2018; 1862:1168-1179. [PMID: 29466707 DOI: 10.1016/j.bbagen.2018.02.010] [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: 01/24/2018] [Accepted: 02/14/2018] [Indexed: 11/16/2022]
Abstract
BACKGROUND Transferrin and its receptors play an important role during the uptake and transcytosis of iron through blood-brain barrier (BBB) endothelial cells (ECs) to maintain iron homeostasis in BBB endothelium and brain. Any disruptions in the cell environment may change the distribution of transferrin receptors on the cell surface, which eventually alter the homeostasis and initiate neurodegenerative disorders. In this paper, we developed a comprehensive mathematical model that considers the necessary kinetics for holo-transferrin internalization and acidification, apo-transferrin recycling, and exocytosis of free iron and transferrin-bound iron through basolateral side of BBB ECs. METHODS Ordinary differential equations are formulated based on the first order reaction kinetics to model the iron transport considering their interactions with transferrin and transferrin receptors. Unknown kinetics rate constants are determined from experimental data by applying a non-linear optimization technique. RESULTS Using the estimated kinetic rate constants, the presented model can effectively reproduce the experimental data of iron transports through BBB ECs for many in-vitro studies. Model results also suggest that the BBB ECs can regulate the extent of the two possible iron transport pathways (free and transferrin-bound iron) by controlling the receptor expression, internalization of holo-transferrin-receptor complexes and acidification of holo-transferrin inside the cell endosomes. CONCLUSION The comprehensive mathematical model described here can predict the iron transport through BBB ECs considering various possible routes from blood side to brain side. The model can also predict the transferrin and iron transport behavior in iron-enriched and iron-depleted cells, which has not been addressed in previous work.
Collapse
Affiliation(s)
- Aminul Islam Khan
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, United States
| | - Jin Liu
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, United States
| | - Prashanta Dutta
- School of Mechanical and Materials Engineering, Washington State University, Pullman, WA 99164-2920, United States.
| |
Collapse
|