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Alsbrook DL, Di Napoli M, Bhatia K, Biller J, Andalib S, Hinduja A, Rodrigues R, Rodriguez M, Sabbagh SY, Selim M, Farahabadi MH, Jafarli A, Divani AA. Neuroinflammation in Acute Ischemic and Hemorrhagic Stroke. Curr Neurol Neurosci Rep 2023; 23:407-431. [PMID: 37395873 PMCID: PMC10544736 DOI: 10.1007/s11910-023-01282-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/24/2023] [Indexed: 07/04/2023]
Abstract
PURPOSE OF REVIEW This review aims to provide an overview of neuroinflammation in ischemic and hemorrhagic stroke, including recent findings on the mechanisms and cellular players involved in the inflammatory response to brain injury. RECENT FINDINGS Neuroinflammation is a crucial process following acute ischemic stroke (AIS) and hemorrhagic stroke (HS). In AIS, neuroinflammation is initiated within minutes of the ischemia onset and continues for several days. In HS, neuroinflammation is initiated by blood byproducts in the subarachnoid space and/or brain parenchyma. In both cases, neuroinflammation is characterized by the activation of resident immune cells, such as microglia and astrocytes, and infiltration of peripheral immune cells, leading to the release of pro-inflammatory cytokines, chemokines, and reactive oxygen species. These inflammatory mediators contribute to blood-brain barrier disruption, neuronal damage, and cerebral edema, promoting neuronal apoptosis and impairing neuroplasticity, ultimately exacerbating the neurologic deficit. However, neuroinflammation can also have beneficial effects by clearing cellular debris and promoting tissue repair. The role of neuroinflammation in AIS and ICH is complex and multifaceted, and further research is necessary to develop effective therapies that target this process. Intracerebral hemorrhage (ICH) will be the HS subtype addressed in this review. Neuroinflammation is a significant contributor to brain tissue damage following AIS and HS. Understanding the mechanisms and cellular players involved in neuroinflammation is essential for developing effective therapies to reduce secondary injury and improve stroke outcomes. Recent findings have provided new insights into the pathophysiology of neuroinflammation, highlighting the potential for targeting specific cytokines, chemokines, and glial cells as therapeutic strategies.
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Affiliation(s)
- Diana L Alsbrook
- Department of Neurology, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Mario Di Napoli
- Neurological Service, SS Annunziata Hospital, Sulmona, L'Aquila, Italy
| | - Kunal Bhatia
- Department of Neurology, University of Mississippi Medical Center, Jackson, MS, USA
| | - José Biller
- Department of Neurology, Loyola University Chicago, Stritch School of Medicine, Maywood, IL, USA
| | - Sasan Andalib
- Research Unit of Neurology, Department of Clinical Research, Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark
| | - Archana Hinduja
- Department of Neurology, The Ohio State University Wexner Medical Center, Columbus, OH, USA
| | - Roysten Rodrigues
- Department of Neurology, University of Louisville, Louisville, KY, USA
| | - Miguel Rodriguez
- College of Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Sara Y Sabbagh
- Department of Neurology, University of New Mexico, Albuquerque, NM, USA
| | - Magdy Selim
- Stroke Division, Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | | | - Alibay Jafarli
- Department of Neurology, Tufts Medical Center, Boston, MA, USA
| | - Afshin A Divani
- Department of Neurology, University of New Mexico, Albuquerque, NM, USA.
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Advances in Molecular Psychiatry - March 2023: mitochondrial function, stress, neuroinflammation - bipolar disorder, psychosis, and Alzheimer's disease. Mol Psychiatry 2023; 28:968-971. [PMID: 36899214 DOI: 10.1038/s41380-023-01968-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Accepted: 01/17/2023] [Indexed: 03/12/2023]
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Tang ML, Wen ZH, Wang JH, Wang ML, Zhang H, Liu XH, Jin L, Chang J. Discovery of Pyridone-Substituted Triazolopyrimidine Dual A 2A/A 1 AR Antagonists for the Treatment of Ischemic Stroke. ACS Med Chem Lett 2022; 13:436-442. [PMID: 35295085 PMCID: PMC8919384 DOI: 10.1021/acsmedchemlett.1c00599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 02/16/2022] [Indexed: 11/28/2022] Open
Abstract
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Ischemic stroke is
a complex systemic disease characterized by
high morbidity, disability, and mortality. The activation of the presynaptic
adenosine A2A and A1 receptors modifies a variety
of brain insults from excitotoxicity to stroke. Therefore, the discovery
of dual A2A/A1 adenosine receptor (AR)-targeting
therapeutic compounds could be a strategy for the treatment of ischemic
stroke. Inspired by two clinical phase III drugs, ASP-5854 (dual A2A/A1 AR antagonist) and preladenant (selective
A2A AR antagonist), and using the hybrid medicinal strategy,
we characterized novel pyridone-substituted triazolopyrimidine scaffolds
as dual A2A/A1 AR antagonists. Among them, compound 1a exerted excellent A2A/A1 AR binding
affinity (Ki = 5.58/24.2
nM), an antagonistic effect (IC50 = 5.72/25.9 nM), and
good metabolic stability in human liver microsomes, rat liver microsomes,
and dog liver microsomes. Importantly, compound 1a demonstrated
a dose–effect relationship in the oxygen-glucose deprivation/reperfusion
(OGD/R)-treated HT22 cell model. These findings support the development
of dual A2A/A1 AR antagonists as a potential
treatment for ischemic stroke.
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Affiliation(s)
- Mei-Lin Tang
- School of Pharmacy, Human Phenome Institute, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Zi-Hao Wen
- School of Pharmacy, Human Phenome Institute, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Jing-Huan Wang
- School of Pharmacy, Human Phenome Institute, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Mei-Ling Wang
- School of Pharmacy, Human Phenome Institute, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Heyanhao Zhang
- School of Pharmacy, Human Phenome Institute, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Xin-Hua Liu
- School of Pharmacy, Human Phenome Institute, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
| | - Lin Jin
- Department of Anesthesia, Zhongshan Hospital, Fudan University, 180 Fenglin Road, Shanghai 200032, China
| | - Jun Chang
- School of Pharmacy, Human Phenome Institute, Fudan University, 826 Zhangheng Road, Shanghai 201203, China
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Asano H, Moriya S, Hatakeyama T, Kobayashi S, Akimoto T, Ohta R, Kawaguchi M. Possible effects of voluntary exercise intensity on anxiety-like behavior and its underlying molecular mechanisms in the hippocampus: Results from a study in Hatano rats. Behav Brain Res 2022; 427:113854. [DOI: 10.1016/j.bbr.2022.113854] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 03/13/2022] [Accepted: 03/15/2022] [Indexed: 11/02/2022]
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Palomino-Antolin A, Narros-Fernández P, Farré-Alins V, Sevilla-Montero J, Decouty-Pérez C, Lopez-Rodriguez AB, Fernández N, Monge L, Casas AI, Calzada MJ, Egea J. Time-dependent dual effect of NLRP3 inflammasome in brain ischemia. Br J Pharmacol 2021; 179:1395-1410. [PMID: 34773639 DOI: 10.1111/bph.15732] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2020] [Revised: 09/21/2021] [Accepted: 10/05/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Post-ischemic inflammation contributes to worsening of ischemic brain injury and in this process, the inflammasomes play a key role. Inflammasomes are cytosolic multiprotein complexes which upon assembly activate the maturation and secretion of the inflammatory cytokines IL-1β and IL-18. However, participation of the NLRP3 inflammasome in ischemic stroke remains controversial. Our aims were to determine the role of NLRP3 in ischemia and to explore the mechanism involved in the potential protective effect of the neurovascular unit. METHODS WT and NLRP3 knock-out mice were subjected to ischemia by middle cerebral artery occlusion (60 minutes) with or without treatment with MCC950 at different time points post-stroke. Brain injury was measured histologically with 2,3,5-triphenyltetrazolium chloride (TTC) staining. RESULTS We identified a time-dependent dual effect of NLRP3. While neither the pre-treatment with MCC950 nor the genetic approach (NLRP3 KO) proved to be neuroprotective, post-reperfusion treatment with MCC950 significantly reduced the infarct volume in a dose-dependent manner. Importantly, MCC950 improved the neuro-motor function and reduced the expression of different pro-inflammatory cytokines (IL-1β, TNF-α), NLRP3 inflammasome components (NLRP3, pro-caspase-1), protease expression (MMP9) and endothelial adhesion molecules (ICAM, VCAM). We observed a marked protection of the blood-brain barrier (BBB), which was also reflected in the recovery of the tight junctions proteins (ZO-1, Claudin-5). Additionally, MCC950 produced a reduction of the CCL2 chemokine in blood serum and in brain tissue, which lead to a reduction in the immune cell infiltration. CONCLUSIONS These findings suggest that post-reperfusion NLRP3 inhibition may be an effective acute therapy for protecting the blood-brain barrier in cerebral ischemia with potential clinical translation.
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Affiliation(s)
- Alejandra Palomino-Antolin
- Molecular Neuroinflammation and Neuronal Plasticity Research Laboratory, Hospital Universitario Santa Cristina, Instituto de Investigación Sanitaria-Hospital Universitario de la Princesa, Madrid, Spain; Instituto Teófilo Hernando, Departamento de Farmacología y Terapéutica, Facultad de Medicina, UAM, Madrid, Spain
| | - Paloma Narros-Fernández
- Molecular Neuroinflammation and Neuronal Plasticity Research Laboratory, Hospital Universitario Santa Cristina, Instituto de Investigación Sanitaria-Hospital Universitario de la Princesa, Madrid, Spain; Instituto Teófilo Hernando, Departamento de Farmacología y Terapéutica, Facultad de Medicina, UAM, Madrid, Spain
| | - Víctor Farré-Alins
- Molecular Neuroinflammation and Neuronal Plasticity Research Laboratory, Hospital Universitario Santa Cristina, Instituto de Investigación Sanitaria-Hospital Universitario de la Princesa, Madrid, Spain; Instituto Teófilo Hernando, Departamento de Farmacología y Terapéutica, Facultad de Medicina, UAM, Madrid, Spain
| | - Javier Sevilla-Montero
- Instituto de Investigacion Sanitaria Princesa (IIS-IP), Department of Medicine, School of Medicine, Universidad Autonoma of Madrid, Spain
| | - Celine Decouty-Pérez
- Molecular Neuroinflammation and Neuronal Plasticity Research Laboratory, Hospital Universitario Santa Cristina, Instituto de Investigación Sanitaria-Hospital Universitario de la Princesa, Madrid, Spain; Instituto Teófilo Hernando, Departamento de Farmacología y Terapéutica, Facultad de Medicina, UAM, Madrid, Spain
| | - Ana Belen Lopez-Rodriguez
- Molecular Neuroinflammation and Neuronal Plasticity Research Laboratory, Hospital Universitario Santa Cristina, Instituto de Investigación Sanitaria-Hospital Universitario de la Princesa, Madrid, Spain; Instituto Teófilo Hernando, Departamento de Farmacología y Terapéutica, Facultad de Medicina, UAM, Madrid, Spain
| | - Nuria Fernández
- Fluorescence Imaging Group, Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - Luis Monge
- Fluorescence Imaging Group, Departamento de Fisiología, Facultad de Medicina, Universidad Autónoma de Madrid, Madrid, Spain
| | - Ana I Casas
- Department of Pharmacology and Personalised Medicine, MHeNs, Maastricht University, Maastricht, The Netherlands.,Department of Neurology, University Clinics Essen, Essen, Germany
| | - María José Calzada
- Instituto de Investigacion Sanitaria Princesa (IIS-IP), Department of Medicine, School of Medicine, Universidad Autonoma of Madrid, Spain
| | - Javier Egea
- Molecular Neuroinflammation and Neuronal Plasticity Research Laboratory, Hospital Universitario Santa Cristina, Instituto de Investigación Sanitaria-Hospital Universitario de la Princesa, Madrid, Spain; Instituto Teófilo Hernando, Departamento de Farmacología y Terapéutica, Facultad de Medicina, UAM, Madrid, Spain
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Ma Z, Li K, Chen P, Pan J, Li X, Zhao G. Propofol Attenuates Inflammatory Damage via Inhibiting NLRP1-Casp1-Casp6 Signaling in Ischemic Brain Injury. Biol Pharm Bull 2021; 43:1481-1489. [PMID: 32999158 DOI: 10.1248/bpb.b20-00050] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Stroke is a common cerebrovascular disease. Inflammation-induced neuronal death is one of the key factors in stroke pathology. Propofol has been shown to ameliorate neuroinflammatory injury, but the exact mechanism of its neuroprotective role remains to be fully elucidated. In the present study, we found that inflammation was activated in ischemic cortical neurons, and the expression of nucleotide-binding domain, leucine-rich-repeat containing family, pyrin domain-containing 1 (NLRP1), NLRP3 inflammasome and effectors in primary cortical neurons increased. However, we found that propofol could inhibit the increased expression of NLRP1 and NLRP3 inflammasome induced by oxygen-glucose deprivation (OGD). Furthermore, the effector molecule caspase-1 (casp1) was revealed to be the downstream target of NLRP1 and propofol repressed the activation of caspase-1 via inhibiting NLRP1 in cortical neurons. Moreover, propofol inhibits caspase-6 activation in neurons through the NLRP1-caspase-1 pathway. Once the expression of caspase6 increases, propofol reduced its neuroprotective effect in OGD-treated cortical neurons. In the stroke middle cerebral artery occlusion (MCAO) model, infusion of caspase-6 inhibitors enhanced the protective effect of propofol on infarct size and neurological function. In conclusion, our results suggest that propofol plays a neuroprotective role in stroke by inhibiting the inflammatory pathway of NLRP1-caspase-1-caspase-6. Overall, these data suggest that propofol plays a key role in the inflammatory-dependent pathway after stroke, providing an important evidence for propofol as an effective strategy for neuroprotection in stroke.
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Affiliation(s)
- Zhuo Ma
- China-Japan Union Hospital of Jilin University.,Hospital of Xi'an Jiaotong University
| | - Kai Li
- China-Japan Union Hospital of Jilin University
| | - Peng Chen
- China-Japan Union Hospital of Jilin University
| | - Jizheng Pan
- China-Japan Union Hospital of Jilin University
| | - Xuyang Li
- China-Japan Union Hospital of Jilin University
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Abstract
Significance: Kidney diseases remain a worldwide public health problem resulting in millions of deaths each year; they are characterized by progressive destruction of renal function by sustained inflammation. Pyroptosis is a lytic type of programmed cell death involved in inflammation, as well as a key fibrotic mechanism that is critical in the development of kidney pathology. Pyroptosis is induced by the cleavage of Gasdermins by various caspases and is executed by the insertion of the N-terminal fragment of cleaved Gasdermins into the plasma membrane, creating oligomeric pores and allowing the release of diverse proinflammatory products into the extracellular space. Inflammasomes are multiprotein complexes leading to the activation of caspase-1, which will cleave Gasdermin D, releasing several proinflammatory cytokines; this results in the initiation and amplification of the inflammatory response. Recent Advances: The efficacy of Gasdermin D cleavage is reduced by a change in the redox balance. Recently, several studies have shown that the attenuation of reactive oxygen species (ROS) production induced by antioxidant pathways results in a reduction of renal pyroptosis. In this review, we discuss the role of pyroptosis in the pathogenesis of chronic kidney disease (CKD) and acute kidney disease; summarize the clinical outcomes and different molecular mechanisms leading to Gasdermin activation; and examine studies about the capacity of antioxidants, particularly Nrf2 activators, to ameliorate Gasdermin activity. Future Directions: We illustrate the potential influence of the deregulation of redox balance on inflammasome activity and pyroptosis as a novel therapeutic approach for the treatment of kidney diseases. Antioxid. Redox Signal. 35, 40-60.
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Affiliation(s)
- Santiago Cuevas
- Molecular Inflammation Group, Biomedical Research Institute of Murcia, University Clinical Hospital Virgen de la Arrixaca, Murcia, Spain
| | - Pablo Pelegrín
- Molecular Inflammation Group, Biomedical Research Institute of Murcia, University Clinical Hospital Virgen de la Arrixaca, Murcia, Spain
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Inserra A, De Gregorio D, Gobbi G. Psychedelics in Psychiatry: Neuroplastic, Immunomodulatory, and Neurotransmitter Mechanisms. Pharmacol Rev 2020; 73:202-277. [PMID: 33328244 DOI: 10.1124/pharmrev.120.000056] [Citation(s) in RCA: 93] [Impact Index Per Article: 23.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Mounting evidence suggests safety and efficacy of psychedelic compounds as potential novel therapeutics in psychiatry. Ketamine has been approved by the Food and Drug Administration in a new class of antidepressants, and 3,4-methylenedioxymethamphetamine (MDMA) is undergoing phase III clinical trials for post-traumatic stress disorder. Psilocybin and lysergic acid diethylamide (LSD) are being investigated in several phase II and phase I clinical trials. Hence, the concept of psychedelics as therapeutics may be incorporated into modern society. Here, we discuss the main known neurobiological therapeutic mechanisms of psychedelics, which are thought to be mediated by the effects of these compounds on the serotonergic (via 5-HT2A and 5-HT1A receptors) and glutamatergic [via N-methyl-d-aspartate (NMDA) and α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors] systems. We focus on 1) neuroplasticity mediated by the modulation of mammalian target of rapamycin-, brain-derived neurotrophic factor-, and early growth response-related pathways; 2) immunomodulation via effects on the hypothalamic-pituitary-adrenal axis, nuclear factor ĸB, and cytokines such as tumor necrosis factor-α and interleukin 1, 6, and 10 production and release; and 3) modulation of serotonergic, dopaminergic, glutamatergic, GABAergic, and norepinephrinergic receptors, transporters, and turnover systems. We discuss arising concerns and ways to assess potential neurobiological changes, dependence, and immunosuppression. Although larger cohorts are required to corroborate preliminary findings, the results obtained so far are promising and represent a critical opportunity for improvement of pharmacotherapies in psychiatry, an area that has seen limited therapeutic advancement in the last 20 years. Studies are underway that are trying to decouple the psychedelic effects from the therapeutic effects of these compounds. SIGNIFICANCE STATEMENT: Psychedelic compounds are emerging as potential novel therapeutics in psychiatry. However, understanding of molecular mechanisms mediating improvement remains limited. This paper reviews the available evidence concerning the effects of psychedelic compounds on pathways that modulate neuroplasticity, immunity, and neurotransmitter systems. This work aims to be a reference for psychiatrists who may soon be faced with the possibility of prescribing psychedelic compounds as medications, helping them assess which compound(s) and regimen could be most useful for decreasing specific psychiatric symptoms.
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Affiliation(s)
- Antonio Inserra
- Neurobiological Psychiatry Unit, Department of Psychiatry, McGill University, Montreal, Quebec, Canada
| | - Danilo De Gregorio
- Neurobiological Psychiatry Unit, Department of Psychiatry, McGill University, Montreal, Quebec, Canada
| | - Gabriella Gobbi
- Neurobiological Psychiatry Unit, Department of Psychiatry, McGill University, Montreal, Quebec, Canada
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Litvin DG, Denstaedt SJ, Borkowski LF, Nichols NL, Dick TE, Smith CB, Jacono FJ. Peripheral-to-central immune communication at the area postrema glial-barrier following bleomycin-induced sterile lung injury in adult rats. Brain Behav Immun 2020; 87:610-633. [PMID: 32097765 PMCID: PMC8895345 DOI: 10.1016/j.bbi.2020.02.006] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 02/02/2020] [Accepted: 02/13/2020] [Indexed: 02/07/2023] Open
Abstract
The pathways for peripheral-to-central immune communication (P → C I-comm) following sterile lung injury (SLI) are unknown. SLI evokes systemic and central inflammation, which alters central respiratory control and viscerosensory transmission in the nucleus tractus solitarii (nTS). These functional changes coincide with increased interleukin-1 beta (IL-1β) in the area postrema, a sensory circumventricular organ that connects P → C I-comm to brainstem circuits that control homeostasis. We hypothesize that IL-1β and its downstream transcriptional target, cyclooxygenase-2 (COX-2), mediate P → C I-comm in the nTS. In a rodent model of SLI induced by intratracheal bleomycin (Bleo), the sigh frequency and duration of post-sigh apnea increased in Bleo- compared to saline- treated rats one week after injury. This SLI-dependent change in respiratory control occurred concurrently with augmented IL-1β and COX-2 immunoreactivity (IR) in the funiculus separans (FS), a barrier between the AP and the brainstem. At this barrier, increases in IL-1β and COX-2 IR were confined to processes that stained for glial fibrillary acidic protein (GFAP) and that projected basolaterally to the nTS. Further, FS radial-glia did not express TNF-α or IL-6 following SLI. To test our hypothesis, we blocked central COX-1/2 activity by intracerebroventricular (ICV) infusion of Indomethacin (Ind). Continuous ICV Ind treatment prevented Bleo-dependent increases in GFAP + and IL-1β + IR, and restored characteristics of sighs that reset the rhythm. These data indicate that changes in sighs following SLI depend partially on activation of a central COX-dependent P → C I-comm via radial-glia of the FS.
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Affiliation(s)
- David G Litvin
- Department of Physiology & Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, United States; Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106, United States; Department of Fundamental Neuroscience, University of Lausanne, 1005 Lausanne, Switzerland
| | - Scott J Denstaedt
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106, United States; Division of Pulmonary and Critical Care Medicine, Department of Internal Medicine, University of Michigan Medical School, Ann Arbor, MI 48109, United States
| | - Lauren F Borkowski
- Department of Biomedical Sciences, University of Missouri College of Veterinary Medicine, Columbia, MO 65212, United States
| | - Nicole L Nichols
- Department of Biomedical Sciences, University of Missouri College of Veterinary Medicine, Columbia, MO 65212, United States
| | - Thomas E Dick
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106, United States; Department of Neurosciences, Case Western Reserve University School of Medicine, Cleveland, OH 44106, United States
| | - Corey B Smith
- Department of Physiology & Biophysics, Case Western Reserve University School of Medicine, Cleveland, OH 44106, United States
| | - Frank J Jacono
- Division of Pulmonary, Critical Care and Sleep Medicine, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106, United States; Division of Pulmonary, Critical Care and Sleep Medicine, Louis Stokes VA Medical Center, Cleveland, OH 44106, United States.
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Oldani M, Fabbri M, Melchioretto P, Callegaro G, Fusi P, Gribaldo L, Forcella M, Urani C. In vitro and bioinformatics mechanistic-based approach for cadmium carcinogenicity understanding. Toxicol In Vitro 2020; 65:104757. [PMID: 31904401 PMCID: PMC7166080 DOI: 10.1016/j.tiv.2020.104757] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 11/28/2019] [Accepted: 01/01/2020] [Indexed: 02/07/2023]
Abstract
Cadmium is a toxic metal able to enter the cells through channels and transport pathways dedicated to essential ions, leading, among others, to the dysregulation of divalent ions homeostasis. Despite its recognized human carcinogenicity, the mechanisms are still under investigation. A powerful tool for mechanistic studies of carcinogenesis is the Cell Transformation Assay (CTA). We have isolated and characterized by whole genome microarray and bioinformatics analysis of differentially expressed genes (DEGs) cadmium-transformed cells from different foci (F1, F2, and F3) at the end of CTA (6 weeks). The systematic analysis of up- and down-regulated transcripts and the comparison of DEGs in transformed cells evidence different functional targets and the complex picture of cadmium-induced transformation. Only 34 in common DEGs are found in cells from all foci, and among these, only 4 genes are jointly up-regulated (Ccl2, Ccl5, IL6 and Spp1), all responsible for cytokines/chemokines coding. Most in common DEGs are down-regulated, suggesting that the switching-off of specific functions plays a major role in this process. In addition, the comparison of dysregulated pathways immediately after cadmium treatment with those in transformed cells provides a valuable means to the comprehension of the overall process. Cell transformation Assay and toxicogenomics are integrated to study cadmium carcinogenesis mechanisms Inflammatory response is the only common feature in Cd-transformed cells from all different foci Switching-off of specific functions plays a major role in Cd-induced carcinogenesis Comparison of triggering signals and deregulated pathways in transformed cells provides hints on cadmium mechanisms
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Affiliation(s)
- Monica Oldani
- Department of Biotechnology and Biosciences, University of Milan - Bicocca, Piazza della Scienza 3, 20126 Milan, Italy
| | - Marco Fabbri
- Dana-Farber Cancer Institute, 450 Brookline Ave, Boston, MA 02215, USA
| | - Pasquale Melchioretto
- Department of Earth and Environmental Sciences, University of Milan - Bicocca, Piazza della Scienza 1, 20126 Milan, Italy
| | - Giulia Callegaro
- Department of Earth and Environmental Sciences, University of Milan - Bicocca, Piazza della Scienza 1, 20126 Milan, Italy; Division of Drug Discovery and Safety, Leiden Academic Centre for Drug Research (LACDR), Leiden University, The Netherlands
| | - Paola Fusi
- Department of Biotechnology and Biosciences, University of Milan - Bicocca, Piazza della Scienza 3, 20126 Milan, Italy; Integrated Models for Prevention and Protection in Environmental and Occupational Health, (MISTRAL) Interuniversity Research Center, Italy
| | - Laura Gribaldo
- European Commission, DG Joint Research Centre, Via Fermi 2749, 21027 Ispra, VA, Italy.
| | - Matilde Forcella
- Department of Biotechnology and Biosciences, University of Milan - Bicocca, Piazza della Scienza 3, 20126 Milan, Italy
| | - Chiara Urani
- Department of Earth and Environmental Sciences, University of Milan - Bicocca, Piazza della Scienza 1, 20126 Milan, Italy; Integrated Models for Prevention and Protection in Environmental and Occupational Health, (MISTRAL) Interuniversity Research Center, Italy
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Bourgognon JM, Cavanagh J. The role of cytokines in modulating learning and memory and brain plasticity. Brain Neurosci Adv 2020; 4:2398212820979802. [PMID: 33415308 PMCID: PMC7750764 DOI: 10.1177/2398212820979802] [Citation(s) in RCA: 99] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Accepted: 11/18/2020] [Indexed: 12/28/2022] Open
Abstract
Cytokines are proteins secreted in the central nervous system by neurons, microglia, astrocytes and infiltrating peripheral immune cells under physiological and pathological conditions. Over the last 20 years, a growing number of reports have investigated the effects of these molecules on brain plasticity. In this review, we describe how the key cytokines interleukin 1β, interleukin 6 and tumour necrosis factor α were found to support long-term plasticity and learning and memory processes in physiological conditions. In contrast, during inflammation where cytokines levels are elevated such as in models of brain injury or infection, depression or neurodegeneration, the effects of cytokines are mostly detrimental to memory mechanisms, associated behaviours and homeostatic plasticity.
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Affiliation(s)
| | - Jonathan Cavanagh
- Institute of Infection, Immunity &
Inflammation, University of Glasgow, Glasgow, UK
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12
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Yang C, Hawkins KE, Doré S, Candelario-Jalil E. Neuroinflammatory mechanisms of blood-brain barrier damage in ischemic stroke. Am J Physiol Cell Physiol 2018; 316:C135-C153. [PMID: 30379577 DOI: 10.1152/ajpcell.00136.2018] [Citation(s) in RCA: 435] [Impact Index Per Article: 72.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
As part of the neurovascular unit, the blood-brain barrier (BBB) is a unique, dynamic regulatory boundary that limits and regulates the exchange of molecules, ions, and cells between the blood and the central nervous system. Disruption of the BBB plays an important role in the development of neurological dysfunction in ischemic stroke. Blood-borne substances and cells have restricted access to the brain due to the presence of tight junctions between the endothelial cells of the BBB. Following stroke, there is loss of BBB tight junction integrity, leading to increased paracellular permeability, which results in vasogenic edema, hemorrhagic transformation, and increased mortality. Thus, understanding principal mediators and molecular mechanisms involved in BBB disruption is critical for the development of novel therapeutics to treat ischemic stroke. This review discusses the current knowledge of how neuroinflammation contributes to BBB damage in ischemic stroke. Specifically, we provide an updated overview of the role of cytokines, chemokines, oxidative and nitrosative stress, adhesion molecules, matrix metalloproteinases, and vascular endothelial growth factor as well as the role of different cell types in the regulation of BBB permeability in ischemic stroke.
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Affiliation(s)
- Changjun Yang
- Department of Neuroscience, McKnight Brain Institute, University of Florida , Gainesville, Florida
| | - Kimberly E Hawkins
- Department of Neuroscience, McKnight Brain Institute, University of Florida , Gainesville, Florida
| | - Sylvain Doré
- Department of Neuroscience, McKnight Brain Institute, University of Florida , Gainesville, Florida.,Departments of Anesthesiology, Neurology, Psychiatry, Psychology, and Pharmaceutics, McKnight Brain Institute, University of Florida , Gainesville, Florida
| | - Eduardo Candelario-Jalil
- Department of Neuroscience, McKnight Brain Institute, University of Florida , Gainesville, Florida
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Neuroimmunomodulation in Major Depressive Disorder: Focus on Caspase 1, Inducible Nitric Oxide Synthase, and Interferon-Gamma. Mol Neurobiol 2018; 56:4288-4305. [PMID: 30306457 PMCID: PMC6505498 DOI: 10.1007/s12035-018-1359-3] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2018] [Accepted: 09/19/2018] [Indexed: 12/13/2022]
Abstract
Major depressive disorder (MDD) is one of the leading causes of disability worldwide, and its incidence is expected to increase. Despite tremendous efforts to understand its underlying biological mechanisms, MDD pathophysiology remains elusive and pharmacotherapy outcomes are still far from ideal. Low-grade chronic inflammation seems to play a key role in mediating the interface between psychological stress, depressive symptomatology, altered intestinal microbiology, and MDD onset. We review the available pre-clinical and clinical evidence of an involvement of pro-inflammatory pathways in the pathogenesis, treatment, and remission of MDD. We focus on caspase 1, inducible nitric oxide synthase, and interferon gamma, three inflammatory systems dysregulated in MDD. Treatment strategies aiming at targeting such pathways alone or in combination with classical therapies could prove valuable in MDD. Further studies are needed to assess the safety and efficacy of immune modulation in MDD and other psychiatric disorders with neuroinflammatory components.
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Role of the IL-1 Pathway in Dopaminergic Neurodegeneration and Decreased Voluntary Movement. Mol Neurobiol 2016; 54:4486-4495. [PMID: 27356916 PMCID: PMC5509814 DOI: 10.1007/s12035-016-9988-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Accepted: 06/14/2016] [Indexed: 12/26/2022]
Abstract
Interleukin-1 (IL-1), a proinflammatory cytokine synthesized and released by activated microglia, can cause dopaminergic neurodegeneration leading to Parkinson’s disease (PD). However, it is uncertain whether IL-1 can act directly, or by exacerbating the harmful actions of other brain insults. To ascertain the role of the IL-1 pathway on dopaminergic neurodegeneration and motor skills during aging, we compared mice with impaired [caspase-1 knockout (casp1−/−)] or overactivated IL-1 activity [IL-1 receptor antagonist knockout (IL-1ra−/−)] to wild-type (wt) mice at young and middle age. Their motor skills were evaluated by the open-field and rotarod tests, and quantification of their dopamine neurons and activated microglia within the substantia nigra were performed by immunohistochemistry. IL-1ra−/− mice showed an age-related decline in motor skills, a reduced number of dopamine neurons, and an increase in activated microglia when compared to wt or casp1−/− mice. Casp1−/− mice had similar changes in motor skills and dopamine neurons, but fewer activated microglia cells than wt mice. Our results suggest that the overactivated IL-1 pathway occurring in IL-1ra−/− mice in the absence of inflammatory interventions (e.g., intracerebral injections performed in animal models of PD) increased activated microglia, decreased the number of dopaminergic neurons, and reduced their motor skills. Decreased IL-1 activity in casp1−/− mice did not yield clear protective effects when compared with wt mice. In summary, in the absence of overt brain insults, chronic activation of the IL-1 pathway may promote pathological aspects of PD per se, but its impairment does not appear to yield advantages over wt mice.
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Wong ML, Inserra A, Lewis MD, Mastronardi CA, Leong L, Choo J, Kentish S, Xie P, Morrison M, Wesselingh SL, Rogers GB, Licinio J. Inflammasome signaling affects anxiety- and depressive-like behavior and gut microbiome composition. Mol Psychiatry 2016; 21:797-805. [PMID: 27090302 PMCID: PMC4879188 DOI: 10.1038/mp.2016.46] [Citation(s) in RCA: 360] [Impact Index Per Article: 45.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Revised: 02/19/2016] [Accepted: 02/22/2016] [Indexed: 12/13/2022]
Abstract
The inflammasome is hypothesized to be a key mediator of the response to physiological and psychological stressors, and its dysregulation may be implicated in major depressive disorder. Inflammasome activation causes the maturation of caspase-1 and activation of interleukin (IL)-1β and IL-18, two proinflammatory cytokines involved in neuroimmunomodulation, neuroinflammation and neurodegeneration. In this study, C57BL/6 mice with genetic deficiency or pharmacological inhibition of caspase-1 were screened for anxiety- and depressive-like behaviors, and locomotion at baseline and after chronic stress. We found that genetic deficiency of caspase-1 decreased depressive- and anxiety-like behaviors, and conversely increased locomotor activity and skills. Caspase-1 deficiency also prevented the exacerbation of depressive-like behaviors following chronic stress. Furthermore, pharmacological caspase-1 antagonism with minocycline ameliorated stress-induced depressive-like behavior in wild-type mice. Interestingly, chronic stress or pharmacological inhibition of caspase-1 per se altered the fecal microbiome in a very similar manner. When stressed mice were treated with minocycline, the observed gut microbiota changes included increase in relative abundance of Akkermansia spp. and Blautia spp., which are compatible with beneficial effects of attenuated inflammation and rebalance of gut microbiota, respectively, and the increment in Lachnospiracea abundance was consistent with microbiota changes of caspase-1 deficiency. Our results suggest that the protective effect of caspase-1 inhibition involves the modulation of the relationship between stress and gut microbiota composition, and establishes the basis for a gut microbiota-inflammasome-brain axis, whereby the gut microbiota via inflammasome signaling modulate pathways that will alter brain function, and affect depressive- and anxiety-like behaviors. Our data also suggest that further elucidation of the gut microbiota-inflammasome-brain axis may offer novel therapeutic targets for psychiatric disorders.
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Affiliation(s)
- M-L Wong
- Mind and Brain Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
- Department of Psychiatry, Flinders Medical Centre, Adelaide, SA, Australia
| | - A Inserra
- Mind and Brain Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
- Department of Psychiatry, Flinders Medical Centre, Adelaide, SA, Australia
| | - M D Lewis
- Mind and Brain Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
- Department of Psychiatry, Flinders Medical Centre, Adelaide, SA, Australia
| | - C A Mastronardi
- Genomics and Predictive Medicine, The John Curtin School of Medical Research, Australian National University, Canberra, ACT, Australia
| | - L Leong
- Infection and Immunity Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
- Department of Microbiology and Infectious Diseases, Flinders University School of Medicine and Flinders Medical Centre, Adelaide, SA, Australia
| | - J Choo
- Infection and Immunity Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
- Department of Microbiology and Infectious Diseases, Flinders University School of Medicine and Flinders Medical Centre, Adelaide, SA, Australia
| | - S Kentish
- Gastrointestinal Vagal Afferent Research Group, The University of Adelaide, Adelaide, SA, Australia
| | - P Xie
- Department of Neurology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Key Laboratory of Neurobiology, and Institute of Neuroscience and the Collaborative Innovation Center for Brain Science, Chongqing Medical University, Chongqing, China
| | - M Morrison
- Translational Research Institute, The University of Queensland Diamantine Institute, Wooloongabba, QLD, Australia
| | - S L Wesselingh
- Infection and Immunity Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
- Department of Microbiology and Infectious Diseases, Flinders University School of Medicine and Flinders Medical Centre, Adelaide, SA, Australia
| | - G B Rogers
- Infection and Immunity Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
- Department of Microbiology and Infectious Diseases, Flinders University School of Medicine and Flinders Medical Centre, Adelaide, SA, Australia
| | - J Licinio
- Mind and Brain Theme, South Australian Health and Medical Research Institute, Adelaide, SA, Australia
- Department of Psychiatry, Flinders Medical Centre, Adelaide, SA, Australia
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Mohamed IN, Ishrat T, Fagan SC, El-Remessy AB. Role of inflammasome activation in the pathophysiology of vascular diseases of the neurovascular unit. Antioxid Redox Signal 2015; 22:1188-206. [PMID: 25275222 PMCID: PMC4403234 DOI: 10.1089/ars.2014.6126] [Citation(s) in RCA: 64] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
SIGNIFICANCE Inflammation is the standard double-edged defense mechanism that aims at protecting the human physiological homeostasis from devastating threats. Both acute and chronic inflammation have been implicated in the occurrence and progression of vascular diseases. Interference with components of the immune system to improve patient outcome after ischemic injury has been uniformly unsuccessful. There is a need for a deeper understanding of the innate immune response to injury in order to modulate, rather than to block inflammation and improve the outcome for vascular diseases. RECENT ADVANCES Nucleotide-binding oligomerization domain-like receptors or NOD-like receptor proteins (NLRPs) can be activated by sterile and microbial inflammation. NLR family plays a major role in activating the inflammasome. CRITICAL ISSUES The aim of this work is to review recent findings that provided insights into key inflammatory mechanisms and define the place of the inflammasome, a multi-protein complex involved in instigating inflammation in neurovascular diseases, including retinopathy, neurodegenerative diseases, and stroke. FUTURE DIRECTIONS The significant contribution of NLRP-inflammasome activation to vascular disease of the neurovascular unit in the brain and retina suggests that therapeutic strategies focused on specific targeting of inflammasome components could significantly improve the outcomes of these diseases.
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Affiliation(s)
- Islam N Mohamed
- 1 Program in Clinical and Experimental Therapeutics, College of Pharmacy, University of Georgia , Augusta, Georgia
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Mastronardi CA, Paz-Filho G, Zanoni M, Molano-González N, Arcos-Burgos M, Licinio J, Wong ML. Temporal gene expression in the hippocampus and peripheral organs to endotoxin-induced systemic inflammatory response in caspase-1-deficient mice. Neuroimmunomodulation 2015; 22:263-73. [PMID: 25633245 PMCID: PMC4710542 DOI: 10.1159/000368310] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Accepted: 09/05/2014] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVES Caspase-1 (casp1), a key protease involved in the systemic inflammatory response syndrome (SIRS), controls the brain expression of a set of eight genes: Nos2 and Ptgs2 (nitric oxide synthase 2 and prostaglandin-endoperoxide synthase 2, two inducible enzymes), Cxcl1 and Cxcl10 (C-X-C motif chemokine ligand 1 and ligand 10), Tgtp and Gbp2 (T cell-specific GTPase 1 and guanylate-binding protein 2, two GTPases), Adamts1 (a disintegrin-like and metallopeptidase with thrombospondin type 1 motif, 1, a metalloprotease) and Il1rn (interleukin-1 receptor antagonist). Our objective was to ascertain whether casp1 also controlled the peripheral expression of these genes and, if so, to compare their central versus peripheral patterns of gene expression in immune and endocrine tissues during SIRS. METHODS Wild-type (wt) and casp1 knockout (casp1(-/-)) mice were injected with either saline or a high dose of endotoxin/lipopolysaccharide (LPS; 800 μg/mice i.p.). Saline-injected mice were immediately euthanized after injection, whereas LPS-injected mice were sacrificed 6 and 12 h after LPS administration. Hippocampal, splenic and adrenal gene expressions were determined by real-time PCR. RESULTS Overall, casp1(-/-) mice showed a lower inflammatory response than wt mice. The expression levels of powerful proinflammatory factors such as Nos2 and Ptgs2 was reduced in casp1(-/-) mice. Moreover, a hierarchical clustering analysis aimed at studying patterns of gene coexpression revealed large alterations in the hippocampal pattern of casp1(-/-) mice. Surprisingly, the expression of Adamts1 was increased in the hippocampus and adrenals of casp1(-/-) mice. CONCLUSIONS The resilience of casp1(-/-) mice to SIRS lethality is associated with a lower inflammatory response, loss of hippocampal gene coexpression patterns, and increased hippocampal Adamts1 gene expression. The latter might be beneficial for casp1(-/-) mice, since ADAMTS1 is likely to play a role in neuronal plasticity. The mechanisms described here may help the development of either novel biomarkers or therapeutic targets against SIRS/sepsis.
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Affiliation(s)
- Claudio Alberto Mastronardi
- Genomics and Predictive Medicine Group, Genome Biology Department, John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Gilberto Paz-Filho
- Genomics and Predictive Medicine Group, Genome Biology Department, John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Martina Zanoni
- Department of Psychiatry, University of Verona, Verona, Italy
| | - Nicolas Molano-González
- Center for Autoimmune Diseases Research (CREA), School of Medicine and Health Sciences, Universidad del Rosario, Bogotá, Colombia
| | - Mauricio Arcos-Burgos
- Genomics and Predictive Medicine Group, Genome Biology Department, John Curtin School of Medical Research, Australian National University, Canberra, Australia
| | - Julio Licinio
- Mind and Brain Theme, South Australian Health and Medical Research Institute and Flinders University of South Australia, Adelaide, Australia
| | - Ma-Li Wong
- Mind and Brain Theme, South Australian Health and Medical Research Institute and Flinders University of South Australia, Adelaide, Australia
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Intravenous immunoglobulin suppresses NLRP1 and NLRP3 inflammasome-mediated neuronal death in ischemic stroke. Cell Death Dis 2013; 4:e790. [PMID: 24008734 PMCID: PMC3789184 DOI: 10.1038/cddis.2013.326] [Citation(s) in RCA: 291] [Impact Index Per Article: 26.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Revised: 07/31/2013] [Accepted: 08/02/2013] [Indexed: 12/12/2022]
Abstract
Multi-protein complexes called inflammasomes have recently been identified and shown to contribute to cell death in tissue injury. Intravenous immunoglobulin (IVIg) is an FDA-approved therapeutic modality used for various inflammatory diseases. The objective of this study is to investigate dynamic responses of the NLRP1 and NLRP3 inflammasomes in stroke and to determine whether the NLRP1 and NLRP3 inflammasomes can be targeted with IVIg for therapeutic intervention. Primary cortical neurons were subjected to glucose deprivation (GD), oxygen-glucose deprivation (OGD) or simulated ischemia-reperfusion (I/R). Ischemic stroke was induced in C57BL/6J mice by middle cerebral artery occlusion, followed by reperfusion. Neurological assessment was performed, brain tissue damage was quantified, and NLRP1 and NLRP3 inflammasome protein levels were evaluated. NLRP1 and NLRP3 inflammasome components were also analyzed in postmortem brain tissue samples from stroke patients. Ischemia-like conditions increased the levels of NLRP1 and NLRP3 inflammasome proteins, and IL-1β and IL-18, in primary cortical neurons. Similarly, levels of NLRP1 and NLRP3 inflammasome proteins, IL-1β and IL-18 were elevated in ipsilateral brain tissues of cerebral I/R mice and stroke patients. Caspase-1 inhibitor treatment protected cultured cortical neurons and brain cells in vivo in experimental stroke models. IVIg treatment protected neurons in experimental stroke models by a mechanism involving suppression of NLRP1 and NLRP3 inflammasome activity. Our findings provide evidence that the NLRP1 and NLRP3 inflammasomes have a major role in neuronal cell death and behavioral deficits in stroke. We also identified NLRP1 and NLRP3 inflammasome inhibition as a novel mechanism by which IVIg can protect brain cells against ischemic damage, suggesting a potential clinical benefit of therapeutic interventions that target inflammasome assembly and activity.
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19
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Vasilache AM, Kugelberg U, Blomqvist A, Nilsberth C. Minor changes in gene expression in the mouse preoptic hypothalamic region by inflammation-induced prostaglandin E2. J Neuroendocrinol 2013; 25:635-43. [PMID: 23631667 DOI: 10.1111/jne.12044] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2013] [Revised: 04/14/2013] [Accepted: 04/26/2013] [Indexed: 11/30/2022]
Abstract
We investigated to what extent inflammation-induced prostaglandin E2 (PGE2 ) regulates gene expression in the central nervous system. Wild-type mice and mice with deletion of the gene encoding microsomal prostaglandin E synthase-1 (mPGES-1), which cannot produce inflammation-induced PGE2 , were subjected to peripheral injection of bacterial wall lipopolysaccharide (LPS) and killed after 5 h. The median and medial preoptic nuclei, which are rich in prostaglandin E receptors, were isolated by laser capture microdissection (LCM), and subjected to whole genome microarray analysis. Although the immune stimulus induced robust transcriptional changes in the brain, as seen by a quantitative reverse transcriptase-polymerase chain reaction (qRT-PCR) on selected genes, only small PGE2 -dependent gene expression changes were observed in the gene array analysis and, for only two genes, a pronounced differential expression between LPS-treated wild-type and mPGES-1 knockout mice could be verified by qRT-PCR. These were Hspa1a and Hspa1b, encoding heat shock proteins, which showed a two- to three-fold higher expression in wild-type mice than in knockout mice after immune challenge. However, the induced expression of these genes was found to be secondary to increased body temperature because they were induced also by cage exchange stress, which did not elicit PGE2 synthesis, and thus were not induced per se by PGE2 -elicited transcriptional events. Our findings suggest that inflammation-induced PGE2 has little effect on gene expression in the preoptic region, and that centrally elicited disease symptoms, although PGE2 -dependent, occur as a result of regulation of neuronal excitability that is a consequence of intracellular, transcriptional-independent signalling cascades. Our findings also imply that the profound changes in gene expression in the brain that are elicited by peripheral inflammation occur independently of PGE2 via a yet unidentified mechanism.
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Affiliation(s)
- A M Vasilache
- Division of Cell Biology, Department of Clinical and Experimental Medicine, Faculty of Health Sciences, Linköping University, S-581 85 Linköping, Sweden
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The absence of P2X7 receptors (P2rx7) on non-haematopoietic cells leads to selective alteration in mood-related behaviour with dysregulated gene expression and stress reactivity in mice. Int J Neuropsychopharmacol 2013; 16:213-33. [PMID: 22243662 PMCID: PMC3666310 DOI: 10.1017/s1461145711001933] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
The purpose of this study was to explore how genetic deletion and pharmacological antagonism of the P2X7 receptor (P2rx7) alter mood-related behaviour, gene expression and stress reactivity in the brain. The forced swim test (FST), tail suspension test (TST) and amphetamine-induced hyperlocomotion (AH) tests were used in wild-type (P2rx7(+/+)) and P2rx7-deficient (P2rx7(-/-)) mice. Biogenic amine levels were analysed in the amygdala and striatum, adrenocorticotropic hormone (ACTH) and corticosterone levels were measured in the plasma and pituitary after restraint stress. Chimeric mice were generated by bone marrow transplantation. A whole genome microarray analysis with real-time polymerase chain reaction validation was performed on the amygdala. In the absence of P2rx7s decreased behavioural despair in the FST, reduced immobility in the TST and attenuated amphetamine-induced hyperactivity were detected. Basal norepinephrine levels were elevated in the amygdala, whereas stress-induced ACTH and corticosterone responses were alleviated in P2rx7(-/-) mice. Sub-acute treatment with the selective P2rx7 antagonist, Brilliant Blue G, reproduced the effect of genetic deletion in the TST and AH test in P2rx7(+/+) but not P2rx7(-/-) mice. No change in behavioural phenotype was observed in chimeras lacking the P2rx7 in their haematopoietic compartment. Whole genome microarray analysis indicated a widespread up- and down-regulation of genes crucial for synaptic function and neuroplasticity by genetic deletion. Here, we present evidence that the absence of P2rx7s on non-haematopoietic cells leads to a mood-stabilizing phenotype in several behavioural models and suggest a therapeutic potential of P2rx7 antagonists for the treatment of mood disorders.
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Using optogenetics to translate the "inflammatory dialogue" between heart and brain in the context of stress. Neurosci Bull 2012; 28:435-48. [PMID: 22833041 DOI: 10.1007/s12264-012-1246-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
Inflammatory processes are an integral part of the stress response and are likely to result from a programmed adaptation that is vital to the organism's survival and well-being. The whole inflammatory response is mediated by largely overlapping circuits in the limbic forebrain, hypothalamus and brainstem, but is also under the control of the neuroendocrine and autonomic nervous systems. Genetically predisposed individuals who fail to tune the respective contributions of the two systems in accordance with stressor modality and intensity after adverse experiences can be at risk for stress-related psychiatric disorders and cardiovascular diseases. Altered glucocorticoid (GC) homeostasis due to GC resistance leads to the failure of neural and negative feedback regulation of the hypothalamic-pituitary-adrenal axis during chronic inflammation, and this might be the mechanism underlying the ensuing brain and heart diseases and the high prevalence of co-morbidity between the two systems. By the combined use of light and genetically-encoded light-sensitive proteins, optogenetics allows cell-type-specific, fast (millisecond-scale) control of precisely defined events in biological systems. This method is an important breakthrough to explore the causality between neural activity patterns and behavioral profiles relevant to anxiety, depression, autism and schizophrenia. Optogenetics also helps to understand the "inflammatory dialogue", the inflammatory processes in psychiatric disorders and cardiovascular diseases, shared by heart and brain in the context of stress.
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Kim CS, Ross IA, Sapienza PP, Hanes DE, Johnson W, Hutter JC. Distribution and pharmacokinetics of double-radiolabeled endotoxin in the rat brain and peripheral organs. Toxicol Ind Health 2012; 30:432-41. [PMID: 22933553 DOI: 10.1177/0748233712458139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The endotoxin, lipopolysaccharide (LPS), of Salmonella typhimurium was biosynthetically labeled with (3)H and (14)C incorporated into the fatty acyl chains and glucosamine residues, respectively. The radio-labeled LPS was isolated from the bacteria and then injected into Sprague-Dawley rats. The distribution of (14)C and (3)H-LPS in plasma and other organs was determined following intraperitoneal (IP) doses of (14)C and (3)H-LPS (200 μg/kg). Plasma concentrations of both fatty acyl chains and glucosamine residues were biphasic, with a relatively rapid decay followed by a slow decline for 48 h. Similar biphasic results were found in the peripheral organs (kidney and heart) and brain barrier tissues (meninges and choroid plexus). In other brain tissues (brain stem, caudate nucleus, hypothalamus, frontal cortex, cerebellum and hippocampus), the glucosamine residue was biphasic, whereas the fatty acyl chains showed accumulation. Highest concentrations of LPS were found in the plasma, spleen and the liver. In addition, in the liver, sustained elevations of (14)C-glucosamine and (3)H-fatty acyl chains were observed. This indicates LPS accumulation in the liver. By contrast, the spleen showed biphasic decay of glucosamine residues and accumulation of fatty acyl chains. In the brain barrier tissues, peak LPS concentrations were significantly reduced (about 70%) and were further reduced (about 95%) in other brain tissues. The high elevation of LPS in the spleen is considered indicative of an immune response. Our findings highlight the potential significant role of lipid A as shown with the sustained elevation of (3)H-fatty acyl chains in the brain.
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Affiliation(s)
- Chung S Kim
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD, USA
| | - Ivan A Ross
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD, USA
| | - Philip P Sapienza
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD, USA
| | - Darcy E Hanes
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD, USA
| | - Widmark Johnson
- Office of Applied Research and Safety Assessment, Center for Food Safety and Applied Nutrition, Food and Drug Administration, Laurel, MD, USA
| | - Joseph C Hutter
- Office of Device Evaluation, Center for Devices and Radiological Health, Silver Spring, MD, USA
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A potential role for pro-inflammatory cytokines in regulating synaptic plasticity in major depressive disorder. Int J Neuropsychopharmacol 2009; 12:561-78. [PMID: 19224657 PMCID: PMC2771334 DOI: 10.1017/s1461145709009924] [Citation(s) in RCA: 230] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
A growing body of data suggests that hyperactivation of the immune system has been implicated in the pathophysiology of major depressive disorder (MDD). Several pro-inflammatory cytokines, such as tumour necrosis factor-alpha (TNF-alpha) and interleukin-1 (IL-1) have been found to be significantly increased in patients with MDD. This review focuses on these two cytokines based on multiple lines of evidence from genetic, animal behaviour, and clinical studies showing that altered levels of serum TNF-alpha and IL-1 are associated with increased risk of depression, cognitive impairments, and reduced responsiveness to treatment. In addition, recent findings have shown that centrally expressed TNF-alpha and IL-1 play a dual role in the regulation of synaptic plasticity. In this paper, we review and critically appraise the mechanisms by which cytokines regulate synaptic and neural plasticity, and their implications for the pathophysiology and treatment of MDD. Finally, we discuss the therapeutic potential of anti-inflammatory-based approaches for treating patients with severe mood disorders. This is a promising field for increasing our understanding of the mechanistic interaction between the immune system, synaptic plasticity, and antidepressants, and for the ultimate development of novel and improved therapeutics for severe mood disorders.
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Neural stem/progenitor cells modulate immune responses by suppressing T lymphocytes with nitric oxide and prostaglandin E2. Exp Neurol 2009; 216:177-83. [DOI: 10.1016/j.expneurol.2008.11.017] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2008] [Revised: 11/18/2008] [Accepted: 11/23/2008] [Indexed: 01/14/2023]
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The brain expression of genes involved in inflammatory response, the ribosome, and learning and memory is altered by centrally injected lipopolysaccharide in mice. THE PHARMACOGENOMICS JOURNAL 2008; 9:116-26. [PMID: 18957951 DOI: 10.1038/tpj.2008.15] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Neuroinflammation plays a role in the progression of several neurodegenerative disorders. We used a lipopolysaccharide (LPS) model of neuroinflammation to characterize the gene expression changes underlying the inflammatory and behavioral effects of neuroinflammation. A single intracerebroventricular injection of LPS (5 microg) was administered into the lateral ventricle of mice and, 24 h later, we examined gene expression in the cerebral cortex and hippocampus using microarray technology. Gene Ontology (GO) terms for inflammation and the ribosome were significantly enriched by LPS, whereas GO terms associated with learning and memory had decreased expression. We detected 224 changed transcripts in the cerebral cortex and 170 in the hippocampus. Expression of Egr1 (also known as Zif268) and Arc, two genes associated with learning and memory, was significantly lower in the cortex, but not in the hippocampus, of LPS-treated animals. Overall, altered expression of these genes may underlie some of the inflammatory and behavioral effects of neuroinflammation.
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Abstract
Multiple lines of evidence suggest that inflammation and glutamate dysfunction contribute to the pathophysiology of depression. In this review we provide an overview of how these two systems may interact. Excess levels of inflammatory mediators occur in a subgroup of depressed patients. Studies of acute experimental activation of the immune system with endotoxin and of chronic activation during interferon-alpha treatment show that inflammation can cause depression. Peripheral inflammation leads to microglial activation which could interfere with excitatory amino acid metabolism leading to inappropriate glutamate receptor activation. Loss of astroglia, a feature of depression, upsets the balance of anti- and pro-inflammatory mediators and further impairs the removal of excitatory amino acids. Microglia activated by excess inflammation, astroglial loss, and inappropriate glutamate receptor activation ultimately disrupt the delicate balance of neuroprotective versus neurotoxic effects in the brain, potentially leading to depression.
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Licinio J, Mastronardi C, Wong ML. Pharmacogenomics of neuroimmune interactions in human psychiatric disorders. Exp Physiol 2007; 92:807-11. [PMID: 17675415 DOI: 10.1113/expphysiol.2007.038471] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
There is bidirectional communication between the brain and the immune system. Overproduction of interleukin-1beta (IL-1beta) leads to systemic inflammatory response syndrome (SIRS). The crucial role of IL-1beta in inflammation has been highlighted by studies performed in caspase-1 knockout mice (casp1(-/-)), transgenic mice that lack mature IL-1beta and survive lethal doses of lypopolysaccharide (LPS). We have previously shown that IL-1beta, its receptor IL-1 receptor I (IL-1RI) and caspase-1 are expressed within the brain. Moreover, we documented that peripherally injected LPS triggers a specific spatiotemporal pattern of expression of IL-1beta mRNA within the brain, suggesting that IL-1beta could be a major regulator of the central inflammatory cascade. Therefore, we studied brain transcriptional patterns that occur during LPS-induced SIRS in wild-type and casp1(-/-) mice. We showed patterns of gene expression in wild-type and casp1(-/-) mice that included differential expression of several genes, such as those for cytokines, chemokines, nitric oxide synthase 2 and cyclo-oygenase 2. A key component of the neuroimmune-endocrine axis that is increased by IL-1beta is corticotrophin releasing hormone (CRH). We found increased response to antidepressants in patients homozygous for the GAG haplotype of CRH receptor-1. Our results support the hypotheses that the CRH receptor-1 gene and possibly other genes in stress-inflammatory pathways are involved in the response to antidepressant treatment. Since dysregulation of the neuroimmune-endocrine axis appears to be one of the fundamental biological mechanisms that underlie psychiatric disorders, our findings might contribute to increase the understanding of the molecular pathways that are altered in these diseases.
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Affiliation(s)
- Julio Licinio
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
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Sanchez-Alavez M, Bartfai T. It all happens between Toll receptors and caspase 1. Proc Natl Acad Sci U S A 2007; 104:7733-4. [PMID: 17483463 PMCID: PMC1876513 DOI: 10.1073/pnas.0702505104] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
| | - Tamas Bartfai
- The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, CA 92037
- *To whom correspondence should be addressed. E-mail:
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Bornstein SR. From Neuroendocrinology to Neuroimmunomodulation - a tribute to Prof. Dr. Samuel McCann. Neuroimmunomodulation 2007; 14:122-5. [PMID: 18073502 DOI: 10.1159/000110634] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
One of the leading experts in the field of Neuroendocrinology and Neuroimmunmodulation, Samuel Mac Donald McCann, known by all his friends as 'Don', passed away in 2007. This article pays tribute to his outstanding scientific contribution and a glimpse on his fascinating personality. A member of the National Academy of Sciences of the United States and pioneer in the field of neuroendocrine regulation, he identified numerous hormones and peptides and set the stage for basic concepts in physiology and clinical medicine.
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Affiliation(s)
- Stefan R Bornstein
- Department of Medicine, University of Dresden, Carl Gustav Carus, Dresden, Gemany.
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