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Mersha MD, Hubbard R, Zeiler SR. Alternate Day Fasting Leads to Improved Post-Stroke Motor Recovery in Mice. Neurorehabil Neural Repair 2024; 38:187-196. [PMID: 38425047 DOI: 10.1177/15459683241232680] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/02/2024]
Abstract
BACKGROUND Caloric restriction promotes neuroplasticity and recovery after neurological injury. In mice, we tested the hypothesis that caloric restriction can act post-stroke to enhance training-associated motor recovery. METHODS Mice were trained to perform a skilled prehension task. We then induced a photothrombotic stroke in the caudal forelimb area, after which we retrained animals on the prehension task following an 8-day delay. Mice underwent either ad libitum feeding or alternate day fasting beginning 1-day after stroke and persisting for either 7 days or the entire post-stroke training period until sacrifice. RESULTS Prior studies have shown that post-stroke recovery of prehension can occur if animals receive rehabilitative training during an early sensitive period but is incomplete if rehabilitative training is delayed. In contrast, we show complete recovery of prehension, despite a delay in rehabilitative training, when mice underwent alternate day fasting beginning 1-day post-stroke and persisting for either 7 days or the entire post-stroke training period until sacrifice. Recovery was independent of weight loss. Stroke volumes were similar across groups. CONCLUSIONS Post-stroke caloric restriction led to recovery of motor function independent of a protective effect on stroke volume. Prehension recovery improved even after ad libitum feeding was reinstituted suggesting that the observed motor recovery was not merely a motivational response. These data add to the growing evidence that post-stroke caloric restriction can enhance recovery.
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Affiliation(s)
- Mahlet D Mersha
- Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
| | - Robert Hubbard
- Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
| | - Steven R Zeiler
- Department of Neurology, Johns Hopkins University, Baltimore, MD, USA
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2
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Gao J, Pang X, Zhang L, Li S, Qin Z, Xie X, Liu J. Transcriptome analysis reveals the neuroprotective effect of Dlg4 against fastigial nucleus stimulation-induced ischemia/reperfusion injury in rats. BMC Neurosci 2023; 24:40. [PMID: 37525090 PMCID: PMC10391810 DOI: 10.1186/s12868-023-00811-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Accepted: 07/17/2023] [Indexed: 08/02/2023] Open
Abstract
BACKGROUND Previous studies have demonstrated that electrical stimulation of the cerebellar fastigial nucleus (FNS) can considerably decrease infarction volume and improve neurofunction restoration following cerebral ischemia. Nevertheless, the molecular mechanism of the neuroprotective effect of FNS is still vague. METHODS In this study, we developed a rat model of ischemia/reperfusion that included 1 h FNS followed by reperfusion for 3, 6, 12, 24, and 72 h. The expression profile of molecular alterations in brain tissues was obtained by transcriptome sequencing at five different time points. The function and pathway of miRNA expression pattern and core genes were annotated by Allen Brain Atlas, STRING database and Cytoscape software, so as to explore the mechanism of FNS-mediated neuroprotection. RESULTS The results indicated that FNS is associated with the neurotransmitter cycle pathway. FNS may regulate the release of monoamine neurotransmitters in synaptic vesicles by targeting the corresponding miRNAs through core Dlg4 gene, stimulate the Alternative polyadenylation (APA) incident's anti -apoptosis effect on the brain, and stimulate the interaction activation of neurons in cerebellum, cortex/thalamus and other brain regions, regulate neurovascular coupling, and reduce cerebral damage. CONCLUSION FNS may activate neuronal and neurovascular coupling by regulating the release of neurotransmitters in synaptic vesicles through the methylation of core Dlg4 gene and the corresponding transcription factors and protein kinases, inducing the anti-apoptotic mechanism of APA events. The findings from our investigation offer a new perspective on the way brain tissue responds to FNS-driven neuroprotection.
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Affiliation(s)
- Jinggui Gao
- Department of Neurology, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Xiaomin Pang
- Department of Neurology, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Lei Zhang
- Department of Neurology, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Shenghua Li
- Department of Neurology, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Zhenxiu Qin
- Department of Neurology, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Xiaoyun Xie
- Department of Neurology, The First Affiliated Hospital, Guangxi Medical University, Nanning, China
| | - Jingli Liu
- Department of Neurology, The First Affiliated Hospital, Guangxi Medical University, Nanning, China.
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3
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Borbor M, Yin D, Brockmeier U, Wang C, Doeckel M, Pillath-Eilers M, Kaltwasser B, Hermann DM, Dzyubenko E. Neurotoxicity of ischemic astrocytes involves STAT3-mediated metabolic switching and depends on glycogen usage. Glia 2023; 71:1553-1569. [PMID: 36810803 DOI: 10.1002/glia.24357] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 02/24/2023]
Abstract
Astrocytic responses are critical for the maintenance of neuronal networks in health and disease. In stroke, reactive astrocytes undergo functional changes potentially contributing to secondary neurodegeneration, but the mechanisms of astrocyte-mediated neurotoxicity remain elusive. Here, we investigated metabolic reprogramming in astrocytes following ischemia-reperfusion in vitro, explored their role in synaptic degeneration, and verified the key findings in a mouse model of stroke. Using indirect cocultures of primary mouse astrocytes and neurons, we demonstrate that transcription factor STAT3 controls metabolic switching in ischemic astrocytes promoting lactate-directed glycolysis and hindering mitochondrial function. Upregulation of astrocytic STAT3 signaling associated with nuclear translocation of pyruvate kinase isoform M2 and hypoxia response element activation. Reprogrammed thereby, the ischemic astrocytes induced mitochondrial respiration failure in neurons and triggered glutamatergic synapse loss, which was prevented by inhibiting astrocytic STAT3 signaling with Stattic. The rescuing effect of Stattic relied on the ability of astrocytes to utilize glycogen bodies as an alternative metabolic source supporting mitochondrial function. After focal cerebral ischemia in mice, astrocytic STAT3 activation was associated with secondary synaptic degeneration in the perilesional cortex. Inflammatory preconditioning with LPS increased astrocytic glycogen content, reduced synaptic degeneration, and promoted neuroprotection post stroke. Our data indicate the central role of STAT3 signaling and glycogen usage in reactive astrogliosis and suggest novel targets for restorative stroke therapy.
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Affiliation(s)
- Mina Borbor
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Dongpei Yin
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Ulf Brockmeier
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Chen Wang
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Marius Doeckel
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Matthias Pillath-Eilers
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Britta Kaltwasser
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Dirk M Hermann
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
| | - Egor Dzyubenko
- Department of Neurology and Center for Translational Neuro- and Behavioral Sciences (C-TNBS), University Hospital Essen, Essen, Germany
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4
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Bielanin JP, Sun D. Significance of Microglial Energy Metabolism in Maintaining Brain Homeostasis. Transl Stroke Res 2022:10.1007/s12975-022-01069-6. [PMID: 35879639 PMCID: PMC9877240 DOI: 10.1007/s12975-022-01069-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 07/19/2022] [Accepted: 07/20/2022] [Indexed: 01/29/2023]
Abstract
Microglia are the most prominent immune cells of the central nervous system (CNS) and play a critical role in maintaining normal brain homeostasis. Under physiological conditions, microglia act as professional phagocytes of the CNS and aid in shaping neural circuity and plasticity through constant surveillance of the brain’s microenvironment. Microglia morphology and physiology exhibit both spatial and temporal heterogeneity, allowing for diverse functionality throughout the brain under control or disease conditions. Increasing evidence suggests that loss of microglial homeostatic function and/or altered energy metabolism plays a role in the pathogenesis of brain diseases, such as stroke, traumatic brain injury (TBI), Alzheimer’s disease (AD), etc. New research findings indicate that metabolic reprogramming is essential for microglia to regulate their effector responses to brain injury. This brief communication highlights the significance of balancing mitochondrial oxidative phosphorylation (OxPHOS) and glycolysis in metabolic homeostasis regulation of microglial cells. However, during brain disease states, the homeostatic balance of OxPHOS and glycolysis is disrupted. Targeting the dysregulation of microglial immunometabolism emerges as a new therapeutic strategy for treating a variety of neurodegenerative diseases.
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Affiliation(s)
- John P. Bielanin
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA 15213,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA 15213
| | - Dandan Sun
- Department of Neurology, University of Pittsburgh, Pittsburgh, PA 15213,Pittsburgh Institute for Neurodegenerative Disorders, University of Pittsburgh, Pittsburgh, PA 15213,Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA 15213,Corresponding author Dandan Sun, MD, PhD, Department of Neurology. University of Pittsburgh Medical School, 7016 Biomedical Science Tower-3, 3501 Fifth Ave., Pittsburgh, PA 15260, USA,
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5
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Liu B, Zhao T, Li Y, Han Y, Xu Y, Yang H, Wang S, Zhao Y, Li P, Wang Y. Notoginsenoside R1 ameliorates mitochondrial dysfunction to circumvent neuronal energy failure in acute phase of focal cerebral ischemia. Phytother Res 2022; 36:2223-2235. [PMID: 35419891 DOI: 10.1002/ptr.7450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 02/03/2022] [Accepted: 03/08/2022] [Indexed: 11/10/2022]
Abstract
Due to sudden loss of cerebral blood circulation, acute ischemic stroke (IS) causes neuronal energy attenuation or even exhaustion by mitochondrial dysfunction resulting in aggravation of neurological injury. In this study, we investigated if Notoginsenoside R1 ameliorated cerebral energy metabolism by limiting neuronal mitochondrial dysfunction in acute IS. Male Sprague-Dawley rats (260-280 g) were selected and performed by permanent middle cerebral artery occlusion model. In vitro, the oxygen glucose deprivation (OGD) model of Neuro2a (N2a) cells was established. We found Notoginsenoside R1 treatment reduced rats' cerebral infarct volume and neurological deficits, with increased Adenosine triphosphate (ATP) level together with upregulated expression of glucose transporter 1/3, monocarboxylate transporter 1 and citrate synthase in brain peri-ischemic tissue. In vitro, OGD-induced N2a cell death was inhibited, cell mitochondrial morphology was improved. Mitochondrial amount, mitochondrial membrane potential, and mitochondrial DNA copy number were increased by Notoginsenoside R1 administration. Furthermore, mitochondrial energy metabolism-related mRNA array found Atp12a and Atp6v1g3 gene expression were upregulated more than twofold, which were also verified in rat ischemic tissue by quantitative polymerase chain reaction (qPCR) assay. Therefore, Notoginsenoside R1 administration increases cerebral glucose and lactate transportation and ATP levels, ameliorates neuronal mitochondrial function after IS. Notoginsenoside R1 may be a novel protective agent for neuronal mitochondria poststroke.
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Affiliation(s)
- Bowen Liu
- Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Macao SAR, China
| | - Tingting Zhao
- Faculty of Chinese Medicine, Macau University of Science and Technology, Macao SAR, China
| | - Yiyang Li
- Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Macao SAR, China
| | - Yan Han
- Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Macao SAR, China
| | - Youhua Xu
- Faculty of Chinese Medicine, Macau University of Science and Technology, Macao SAR, China
| | - Hua Yang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Shengpeng Wang
- Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Macao SAR, China
| | - Yonghua Zhao
- Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Macao SAR, China
| | - Ping Li
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, China
| | - Yitao Wang
- Institute of Chinese Medical Sciences, State Key Laboratory of Quality Research in Chinese Medicine, University of Macau, Macao SAR, China
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6
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Silva de Carvalho T, Singh V, Mohamud Yusuf A, Wang J, Schultz Moreira AR, Sanchez-Mendoza EH, Sardari M, Nascentes Melo LM, Doeppner TR, Kehrmann J, Scholtysik R, Hitpass L, Gunzer M, Hermann DM. Post-ischemic protein restriction induces sustained neuroprotection, neurological recovery, brain remodeling, and gut microbiota rebalancing. Brain Behav Immun 2022; 100:134-144. [PMID: 34848338 DOI: 10.1016/j.bbi.2021.11.016] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 10/26/2021] [Accepted: 11/22/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Moderate dietary protein restriction confers neuroprotection when applied before ischemic stroke. How a moderately protein-reduced diet influences stroke recovery when administered after stroke, is a clinically relevant question. This question has not yet been investigated. METHODS Male C57BL6/J mice were exposed to transient intraluminal middle cerebral artery occlusion. Immediately after the stroke, mice were randomized to two normocaloric diets: a moderately protein-reduced diet containing 8% protein (PRD) or normal diet containing 20% protein (ND). Post-stroke neurological deficits were evaluated by a comprehensive test battery. Antioxidant and neuroinflammatory responses in the brain and liver were evaluated by Western blot and RTqPCR. Stroke-induced brain injury, microvascular integrity, glial responses, and neuroplasticity were assessed by immunohistochemistry. Fecal microbiota analysis was performed using 16S ribosomal RNA amplicon sequencing. RESULTS We show that PRD reduces brain infarct volume after three days and enhances neurological and, specifically, motor-coordination recovery over six weeks in stroke mice. The recovery-promoting effects of PRD were associated with increased antioxidant responses and reduced neuroinflammation. Histochemical studies revealed that PRD increased long-term neuronal survival, increased peri-infarct microvascular density, reduced microglia/macrophage accumulation, increased contralesional pyramidal tract plasticity, and reduced brain atrophy. Fecal microbiota analysis showed reduced bacterial richness and diversity in ischemic mice on ND starting at 7 dpi. PRD restored bacterial richness and diversity at these time points. CONCLUSION Moderate dietary protein restriction initiated post-ischemic stroke induces neurological recovery, brain remodeling, and neuroplasticity in mice by mechanisms involving antiinflammation and, in the post-acute phase, commensal gut microbiota rebalancing.
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Affiliation(s)
- Tayana Silva de Carvalho
- Department of Neurology, University Hospital Essen, Essen, Germany; Center for Translational and Behavioral Neurosciences, University Hospital Essen, Essen, Germany
| | - Vikramjeet Singh
- Institute for Experimental Immunology and Imaging, University Hospital Essen, Essen, Germany
| | - Ayan Mohamud Yusuf
- Department of Neurology, University Hospital Essen, Essen, Germany; Center for Translational and Behavioral Neurosciences, University Hospital Essen, Essen, Germany
| | - Jing Wang
- Department of Neurology, University Hospital Essen, Essen, Germany; Center for Translational and Behavioral Neurosciences, University Hospital Essen, Essen, Germany
| | - Adriana R Schultz Moreira
- Department of Neurology, University Hospital Essen, Essen, Germany; Center for Translational and Behavioral Neurosciences, University Hospital Essen, Essen, Germany
| | - Eduardo H Sanchez-Mendoza
- Department of Neurology, University Hospital Essen, Essen, Germany; Center for Translational and Behavioral Neurosciences, University Hospital Essen, Essen, Germany
| | - Maryam Sardari
- Department of Neurology, University Hospital Essen, Essen, Germany; Center for Translational and Behavioral Neurosciences, University Hospital Essen, Essen, Germany; Department of Animal Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran
| | - Luiza M Nascentes Melo
- Department of Neurology, University Hospital Essen, Essen, Germany; Center for Translational and Behavioral Neurosciences, University Hospital Essen, Essen, Germany
| | | | - Jan Kehrmann
- Institute of Medical Microbiology, University Hospital Essen, Essen, Germany
| | - Rene Scholtysik
- Institute of Cell Biology, University Hospital Essen, Essen, Germany
| | - Ludger Hitpass
- Institute of Cell Biology, University Hospital Essen, Essen, Germany
| | - Matthias Gunzer
- Institute for Experimental Immunology and Imaging, University Hospital Essen, Essen, Germany; Leibniz-Institut für Analytische Wissenschaften ISAS e.V, Dortmund, Germany
| | - Dirk M Hermann
- Department of Neurology, University Hospital Essen, Essen, Germany; Center for Translational and Behavioral Neurosciences, University Hospital Essen, Essen, Germany.
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7
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de Carvalho TS. Calorie restriction or dietary restriction: how far they can protect the brain against neurodegenerative diseases? Neural Regen Res 2022; 17:1640-1644. [PMID: 35017409 PMCID: PMC8820686 DOI: 10.4103/1673-5374.332126] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Finding the correct nutritional intervention is one of the biggest challenges in treating patients with neurodegenerative diseases. In general, these patients develop strong metabolic alterations, resulting in lower treatment efficacy and higher mortality rates. However, there are still many open questions regarding the effectiveness of dietary interventions in neurodiseases. Some studies have shown that a reduction in calorie intake activates key pathways that might be important for preventing or slowing down the progression of such diseases. However, it is still unclear whether these neuroprotective effects are associated with an overall reduction in calories (hypocaloric diet) or a specific nutrient restriction (diet restriction). Therefore, here we discuss how commonly or differently hypocaloric and restricted diets modulate signaling pathways and how these changes can protect the brain against neurodegenerative diseases.
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8
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de Carvalho TS, Sanchez-Mendoza EH, Schultz Moreira AR, Nascentes Melo LM, Wang C, Sardari M, Hagemann N, Doeppner TR, Kleinschnitz C, Hermann DM. Hypocaloric Diet Initiated Post-Ischemia Provides Long-Term Neuroprotection and Promotes Peri-Infarct Brain Remodeling by Regulating Metabolic and Survival-Promoting Proteins. Mol Neurobiol 2021; 58:1491-1503. [PMID: 33200399 PMCID: PMC7932971 DOI: 10.1007/s12035-020-02207-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 11/09/2020] [Indexed: 11/26/2022]
Abstract
Calorie restriction confers post-ischemic neuroprotection, when administered in a defined time window before ischemic stroke. How a hypocaloric diet influences stroke recovery when initiated after stroke has not been investigated. Male C57BL6/j mice were exposed to transient intraluminal middle cerebral artery occlusion. Immediately post-ischemia, mice were randomized to two groups receiving moderately hypocaloric (2286 kcal/kg food) or normocaloric (3518 kcal/kg) diets ad libitum. Animals were sacrificed at 3 or 56 days post-ischemia (dpi). Besides increased low density lipoprotein at 3 days and reduced alanine aminotransferase and increased urea at 56 days, no alterations of plasma markers were found in ischemic mice on hypocaloric diet. Body weight mildly decreased over 56 dpi by 7.4%. Hypocaloric diet reduced infarct volume in the acute stroke phase at 3 dpi and decreased brain atrophy, increased neuronal survival and brain capillary density in peri-infarct striatum and reduced motor coordination impairment in tight rope tests in the post-acute stroke phase over up to 56 dpi. The abundance of brain-derived neurotrophic factor, the NAD-dependent deacetylase and longevity protein sirtuin-1, the anti-oxidant glutathione peroxidase-3, and the ammonium detoxifier glutamine synthetase in the peri-infarct brain tissue was increased by hypocaloric diet. This study shows that a moderately hypocaloric diet that is initiated after stroke confers long-term neuroprotection and promotes peri-infarct brain remodeling.
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Affiliation(s)
| | | | | | - Luiza M Nascentes Melo
- Department of Neurology, University Hospital Essen, Hufelandstraße 55, D-45122, Essen, Germany
| | - Chen Wang
- Department of Neurology, University Hospital Essen, Hufelandstraße 55, D-45122, Essen, Germany
| | - Maryam Sardari
- Department of Neurology, University Hospital Essen, Hufelandstraße 55, D-45122, Essen, Germany
| | - Nina Hagemann
- Department of Neurology, University Hospital Essen, Hufelandstraße 55, D-45122, Essen, Germany
| | | | - Christoph Kleinschnitz
- Department of Neurology, University Hospital Essen, Hufelandstraße 55, D-45122, Essen, Germany
| | - Dirk M Hermann
- Department of Neurology, University Hospital Essen, Hufelandstraße 55, D-45122, Essen, Germany.
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9
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Rh-CSF1 Attenuates Oxidative Stress and Neuronal Apoptosis via the CSF1R/PLCG2/PKA/UCP2 Signaling Pathway in a Rat Model of Neonatal HIE. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2020; 2020:6801587. [PMID: 33101590 PMCID: PMC7568161 DOI: 10.1155/2020/6801587] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Accepted: 07/30/2020] [Indexed: 12/12/2022]
Abstract
Oxidative stress (OS) and neuronal apoptosis are major pathological processes after hypoxic-ischemic encephalopathy (HIE). Colony stimulating factor 1 (CSF1), binding to CSF1 receptor (CSF1R), has been shown to reduce neuronal loss after hypoxic-ischemia- (HI-) induced brain injury. In the present study, we hypothesized that CSF1 could alleviate OS-induced neuronal degeneration and apoptosis through the CSF1R/PLCG2/PKA/UCP2 signaling pathway in a rat model of HI. A total of 127 ten-day old Sprague Dawley rat pups were used. HI was induced by right common carotid artery ligation with subsequent exposure to hypoxia for 2.5 h. Exogenous recombinant human CSF1 (rh-CSF1) was administered intranasally at 1 h and 24 h after HI. The CSF1R inhibitor, BLZ945, or phospholipase C-gamma 2 (PLCG2) inhibitor, U73122, was injected intraperitoneally at 1 h before HI induction. Brain infarct volume measurement, cliff avoidance test, righting reflex test, double immunofluorescence staining, western blot assessment, 8-OHdG and MitoSOX staining, Fluoro-Jade C staining, and TUNEL staining were used. Our results indicated that the expressions of endogenous CSF1, CSF1R, p-CSF1R, p-PLCG2, p-PKA, and uncoupling protein2 (UCP2) were increased after HI. CSF1 and CSF1R were expressed in neurons and astrocytes. Rh-CSF1 treatment significantly attenuated neurological deficits, infarct volume, OS, neuronal apoptosis, and degeneration at 48 h after HI. Moreover, activation of CSF1R by rh-CSF1 significantly increased the brain tissue expressions of p-PLCG2, p-PKA, UCP2, and Bcl2/Bax ratio, but reduced the expression of cleaved caspase-3. The neuroprotective effects of rh-CSF1 were abolished by BLZ945 or U73122. These results suggested that rh-CSF1 treatment attenuated OS-induced neuronal degeneration and apoptosis after HI, at least in part, through the CSF1R/PLCG2/PKA/UCP2 signaling pathway. Rh-CSF1 may serve as therapeutic strategy against brain damage in patients with HIE.
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10
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Salameh E, Jarbeau M, Morel FB, Zeilani M, Aziz M, Déchelotte P, Marion-Letellier R. Modeling undernutrition with enteropathy in mice. Sci Rep 2020; 10:15581. [PMID: 32973261 PMCID: PMC7518247 DOI: 10.1038/s41598-020-72705-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 07/28/2020] [Indexed: 01/25/2023] Open
Abstract
Undernutrition is a global health issue leading to 1 out 5 all deaths in children under 5 years. Undernutrition is often associated with environmental enteric dysfunction (EED), a syndrome associated with increased intestinal permeability and gut inflammation. We aimed to develop a novel murine model of undernutrition with these EED features. Post-weaning mice were fed with low-protein diet (LP) alone or combined with a gastrointestinal insult trigger (indomethacin or liposaccharides). Growth, intestinal permeability and inflammation were assessed. LP diet induced stunting and wasting in post-weaning mice but did not impact gut barrier. We therefore combined LP diet with a single administration of indomethacin or liposaccharides (LPS). Indomethacin increased fecal calprotectin production while LPS did not. To amplify indomethacin effects, we investigated its repeated administration in addition to LP diet and mice exhibited stunting and wasting with intestinal hyperpermeability and gut inflammation. The combination of 3-weeks LP diet with repeated oral indomethacin administration induced wasting, stunting and gut barrier dysfunction as observed in undernourished children with EED. As noninvasive methods for investigating gut function in undernourished children are scarce, the present pre-clinical model provides an affordable tool to attempt to elucidate pathophysiological processes involved in EED and to identify novel therapeutic strategies.
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Affiliation(s)
- Emmeline Salameh
- Normandie Univ, INSERM Unit 1073, University of Rouen, 22 Boulevard Gambetta, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine (IRIB), University of Rouen, Rouen, France.,Nutrition Department, Nutriset S.A.S, Malaunay, France
| | - Marine Jarbeau
- Normandie Univ, INSERM Unit 1073, University of Rouen, 22 Boulevard Gambetta, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine (IRIB), University of Rouen, Rouen, France
| | - Fanny B Morel
- Nutrition Department, Nutriset S.A.S, Malaunay, France
| | | | - Moutaz Aziz
- Anatomopathology, Rouen University Hospital, Rouen, France
| | - Pierre Déchelotte
- Normandie Univ, INSERM Unit 1073, University of Rouen, 22 Boulevard Gambetta, 76000, Rouen, France.,Institute for Research and Innovation in Biomedicine (IRIB), University of Rouen, Rouen, France.,Nutrition Unit, Rouen University Hospital, Rouen, France
| | - Rachel Marion-Letellier
- Normandie Univ, INSERM Unit 1073, University of Rouen, 22 Boulevard Gambetta, 76000, Rouen, France. .,Institute for Research and Innovation in Biomedicine (IRIB), University of Rouen, Rouen, France.
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11
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Moderate Protein Restriction Protects Against Focal Cerebral Ischemia in Mice by Mechanisms Involving Anti-inflammatory and Anti-oxidant Responses. Mol Neurobiol 2019; 56:8477-8488. [PMID: 31257559 PMCID: PMC6835038 DOI: 10.1007/s12035-019-01679-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Accepted: 06/10/2019] [Indexed: 12/02/2022]
Abstract
Food composition influences stroke risk, but its effects on ischemic injury and neurological deficits are poorly examined. While severe reduction of protein content was found to aggravate neurological impairment and brain injury as a consequence of combined energy-protein malnutrition, moderate protein restriction not resulting in energy deprivation was recently suggested to protect against perinatal hypoxia-ischemia. Male C57BL6/j mice were exposed to moderate protein restriction by providing a normocaloric diet containing 8% protein (control: 20% protein) for 7, 14, or 30 days. Intraluminal middle cerebral artery occlusion was then induced. Mice were sacrificed 24 h later. Irrespective of the duration of food modification (that is, 7–30 days), protein restriction reduced neurological impairment of ischemic mice revealed by a global and focal deficit score. Prolonged protein restriction over 30 days also reduced infarct volume, brain edema, and blood-brain barrier permeability and increased the survival of NeuN+ neurons in the core of the stroke (i.e., striatum). Neuroprotection by prolonged protein restriction went along with reduced brain infiltration of CD45+ leukocytes and reduced expression of inducible NO synthase and interleukin-1β. As potential mechanisms, increased levels of the NAD-dependent deacetylase sirtuin-1 and anti-oxidant glutathione peroxidase-3 were noted in ischemic brain tissue. Irrespective of the protein restriction duration, a shift from pro-oxidant oxidative stress markers (NADPH oxidase-4) to anti-oxidant markers (superoxide dismutase-1/2, glutathione peroxidase-3 and catalase) was found in the liver. Moderate protein restriction protects against ischemia in the adult brain. Accordingly, dietary modifications may be efficacious strategies promoting stroke outcome.
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