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Shang Y, Zheng L, Du Y, Shang T, Liu X, Zou W. Role of Regulatory T Cells in Intracerebral Hemorrhage. Mol Neurobiol 2024:10.1007/s12035-024-04281-7. [PMID: 38877366 DOI: 10.1007/s12035-024-04281-7] [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: 03/06/2024] [Accepted: 06/03/2024] [Indexed: 06/16/2024]
Abstract
Intracerebral hemorrhage (ICH) is a common cerebrovascular disease that can lead to severe neurological dysfunction in surviving patients, resulting in a heavy burden on patients and their families. When ICH occurs, the blood‒brain barrier is disrupted, thereby promoting immune cell migration into damaged brain tissue. As important immunosuppressive T cells, regulatory T (Treg) cells are involved in the maintenance of immune homeostasis and the suppression of immune responses after ICH. Treg cells mitigate brain tissue damage after ICH in a variety of ways, such as inhibiting the neuroinflammatory response, protecting against blood‒brain barrier damage, reducing oxidative stress damage and promoting nerve repair. In this review, we discuss the changes in Treg cells in ICH clinical patients and experimental animals, the mechanisms by which Treg cells regulate ICH and treatments targeting Treg cells in ICH, aiming to support new therapeutic strategies for clinical treatment.
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Affiliation(s)
- Yaxin Shang
- The Graduate School, Heilongjiang University of Chinese Medicine, Harbin, 150000, Heilongjiang, People's Republic of China
| | - Lei Zheng
- The First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, 150000, Heilongjiang, People's Republic of China
- Molecular Biology Laboratory of Clinical Integrated of Traditional Chinese and Western Medicine of Heilong Jiang Province, Heilongjiang University of Chinese Medicine, Harbin, 150000, Heilongjiang, People's Republic of China
| | - Yunpeng Du
- The Graduate School, Heilongjiang University of Chinese Medicine, Harbin, 150000, Heilongjiang, People's Republic of China
| | - Tong Shang
- The Graduate School, Heilongjiang University of Chinese Medicine, Harbin, 150000, Heilongjiang, People's Republic of China
| | - Xueting Liu
- The Graduate School, Heilongjiang University of Chinese Medicine, Harbin, 150000, Heilongjiang, People's Republic of China
| | - Wei Zou
- The First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Harbin, 150000, Heilongjiang, People's Republic of China.
- Molecular Biology Laboratory of Clinical Integrated of Traditional Chinese and Western Medicine of Heilong Jiang Province, Heilongjiang University of Chinese Medicine, Harbin, 150000, Heilongjiang, People's Republic of China.
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2
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Mi Z, Povysheva N, Rose ME, Ma J, Zeh DJ, Harikumar N, Bhuiyan MIH, Graham SH. Abolishing UCHL1's hydrolase activity exacerbates ischemia-induced axonal injury and functional deficits in mice. J Cereb Blood Flow Metab 2024:271678X241258809. [PMID: 38833565 DOI: 10.1177/0271678x241258809] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/06/2024]
Abstract
Ubiquitin C-terminal hydrolase L1 (UCHL1) is a neuronal protein important in maintaining axonal integrity and motor function and may be important in the pathogenesis of many neurological disorders. UCHL1 may ameliorate acute injury and improve recovery after cerebral ischemia. In the current study, the hypothesis that UCHL1's hydrolase activity underlies its effect in maintaining axonal integrity and function is tested after ischemic injury. Hydrolase activity was inhibited by treatment with a UCHL1 hydrolase inhibitor or by employing knockin mice bearing a mutation in the hydrolase active site (C90A). Ischemic injury was induced by oxygen-glucose deprivation (OGD) in brain slice preparations and by transient middle cerebral artery occlusion (tMCAO) surgery in mice. Hydrolase activity inhibition increased restoration time and decreased the amplitude of evoked axonal responses in the corpus callosum after OGD. Mutation of the hydrolase active site exacerbated white matter injury as detected by SMI32 immunohistochemistry, and motor deficits as detected by beam balance and cylinder testing after tMCAO. These results demonstrate that UCHL1 hydrolase activity ameliorates white matter injury and functional deficits after acute ischemic injury and support the hypothesis that UCHL1 activity plays a significant role in preserving white matter integrity and recovery of function after cerebral ischemia.
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Affiliation(s)
- Zhiping Mi
- Department of Neurology, School of Medicine, Kenneth P. Dietrich School of Arts and Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nadya Povysheva
- Department of Neuroscience, Kenneth P. Dietrich School of Arts and Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Marie E Rose
- Department of Neurology, School of Medicine, Kenneth P. Dietrich School of Arts and Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Jie Ma
- Department of Neurology, School of Medicine, Kenneth P. Dietrich School of Arts and Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Dennis J Zeh
- Department of Neurology, School of Medicine, Kenneth P. Dietrich School of Arts and Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Nikitha Harikumar
- Department of Neuroscience, Kenneth P. Dietrich School of Arts and Sciences, University of Pittsburgh, Pittsburgh, PA, USA
| | - Mohammad Iqbal H Bhuiyan
- Department of Pharmaceutical Sciences, School of Pharmacy, University of Texas at El Paso, El Paso, TX, USA
| | - Steven H Graham
- Department of Neurology, School of Medicine, Kenneth P. Dietrich School of Arts and Sciences, University of Pittsburgh, Pittsburgh, PA, USA
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3
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Han Y, Jing Y, Shi Y, Mo H, Wan Y, Zhou H, Deng F. The role of language-related functional brain regions and white matter tracts in network plasticity of post-stroke aphasia. J Neurol 2024; 271:3095-3115. [PMID: 38607432 DOI: 10.1007/s00415-024-12358-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/26/2024] [Accepted: 03/27/2024] [Indexed: 04/13/2024]
Abstract
The neural mechanisms underlying language recovery after a stroke remain controversial. This review aimed to summarize the plasticity and reorganization mechanisms of the language network through neuroimaging studies. Initially, we discussed the involvement of right language homologues, perilesional tissue, and domain-general networks. Subsequently, we summarized the white matter functional mapping and remodeling mechanisms associated with language subskills. Finally, we explored how non-invasive brain stimulation (NIBS) promoted language recovery by inducing neural network plasticity. It was observed that the recruitment of right hemisphere language area homologues played a pivotal role in the early stages of frontal post-stroke aphasia (PSA), particularly in patients with larger lesions. Perilesional plasticity correlated with improved speech performance and prognosis. The domain-general networks could respond to increased "effort" in a task-dependent manner from the top-down when the downstream language network was impaired. Fluency, repetition, comprehension, naming, and reading skills exhibited overlapping and unique dual-pathway functional mapping models. In the acute phase, the structural remodeling of white matter tracts became challenging, with recovery predominantly dependent on cortical activation. Similar to the pattern of cortical activation, during the subacute and chronic phases, improvements in language functions depended, respectively, on the remodeling of right white matter tracts and the restoration of left-lateralized language structural network patterns. Moreover, the midline superior frontal gyrus/dorsal anterior cingulate cortex emerged as a promising target for NIBS. These findings offered theoretical insights for the early personalized treatment of aphasia after stroke.
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Affiliation(s)
- Yue Han
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Yuanyuan Jing
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Yanmin Shi
- Health Management (Physical Examination) Center, The Second Norman Bethune Hospital of Jilin University, Changchun, China
| | - Hongbin Mo
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Yafei Wan
- Department of Neurology, The First Hospital of Jilin University, Changchun, China
| | - Hongwei Zhou
- Department of Radiology, The First Hospital of Jilin University, Changchun, China.
| | - Fang Deng
- Department of Neurology, The First Hospital of Jilin University, Changchun, China.
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Huang J, Zhu Z, Schlüter D, Lambertsen KL, Song W, Wang X. Ubiquitous regulation of cerebrovascular diseases by ubiquitin-modifying enzymes. Clin Transl Med 2024; 14:e1719. [PMID: 38778460 PMCID: PMC11111633 DOI: 10.1002/ctm2.1719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 05/06/2024] [Accepted: 05/11/2024] [Indexed: 05/25/2024] Open
Abstract
Cerebrovascular diseases (CVDs) are a major threat to global health. Elucidation of the molecular mechanisms underlying the pathology of CVDs is critical for the development of efficacious preventative and therapeutic approaches. Accumulating studies have highlighted the significance of ubiquitin-modifying enzymes (UMEs) in the regulation of CVDs. UMEs are a group of enzymes that orchestrate ubiquitination, a post-translational modification tightly involved in CVDs. Functionally, UMEs regulate multiple pathological processes in ischemic and hemorrhagic stroke, moyamoya disease, and atherosclerosis. Considering the important roles of UMEs in CVDs, they may become novel druggable targets for these diseases. Besides, techniques applying UMEs, such as proteolysis-targeting chimera and deubiquitinase-targeting chimera, may also revolutionize the therapy of CVDs in the future.
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Affiliation(s)
- Jingyong Huang
- Department of Vascular SurgeryThe First Affiliated Hospital of Wenzhou Medical UniversityWenzhouChina
| | - Zhenhu Zhu
- School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhouChina
| | - Dirk Schlüter
- Institute of Medical Microbiology and Hospital Epidemiology, Hannover Medical SchoolHannoverGermany
| | - Kate Lykke Lambertsen
- Department of Neurobiology ResearchInstitute of Molecular MedicineUniversity of Southern DenmarkOdense CDenmark
- BRIGDE—Brain Research—Inter‐Disciplinary Guided Excellence, Department of Clinical ResearchUniversity of Southern DenmarkOdense CDenmark
- Department of NeurologyOdense University HospitalOdense CDenmark
| | - Weihong Song
- Oujiang LaboratoryKey Laboratory of Alzheimer's Disease of Zhejiang ProvinceZhejiang Provincial Clinical Research Center for Mental DisordersInstitute of AgingSchool of Mental HealthAffiliated Kangning HospitalThe Second Affiliated HospitalYuying Children's HospitalWenzhou Medical UniversityWenzhouChina
| | - Xu Wang
- School of Pharmaceutical SciencesWenzhou Medical UniversityWenzhouChina
- Oujiang LaboratoryKey Laboratory of Alzheimer's Disease of Zhejiang ProvinceZhejiang Provincial Clinical Research Center for Mental DisordersInstitute of AgingSchool of Mental HealthAffiliated Kangning HospitalThe Second Affiliated HospitalYuying Children's HospitalWenzhou Medical UniversityWenzhouChina
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Cheng YJ, Wang F, Feng J, Yu B, Wang B, Gao Q, Wang TY, Hu B, Gao X, Chen JF, Chen YJ, Lv SQ, Feng H, Xiao L, Mei F. Prolonged myelin deficits contribute to neuron loss and functional impairments after ischaemic stroke. Brain 2024; 147:1294-1311. [PMID: 38289861 DOI: 10.1093/brain/awae029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2023] [Revised: 12/29/2023] [Accepted: 01/13/2024] [Indexed: 02/01/2024] Open
Abstract
Ischaemic stroke causes neuron loss and long-term functional deficits. Unfortunately, effective approaches to preserving neurons and promoting functional recovery remain unavailable. Oligodendrocytes, the myelinating cells in the CNS, are susceptible to oxygen and nutrition deprivation and undergo degeneration after ischaemic stroke. Technically, new oligodendrocytes and myelin can be generated by the differentiation of oligodendrocyte precursor cells (OPCs). However, myelin dynamics and their functional significance after ischaemic stroke remain poorly understood. Here, we report numerous denuded axons accompanied by decreased neuron density in sections from ischaemic stroke lesions in human brain, suggesting that neuron loss correlates with myelin deficits in these lesions. To investigate the longitudinal changes in myelin dynamics after stroke, we labelled and traced pre-existing and newly-formed myelin, respectively, using cell-specific genetic approaches. Our results indicated massive oligodendrocyte death and myelin loss 2 weeks after stroke in the transient middle cerebral artery occlusion (tMCAO) mouse model. In contrast, myelin regeneration remained insufficient 4 and 8 weeks post-stroke. Notably, neuronal loss and functional impairments worsened in aged brains, and new myelin generation was diminished. To analyse the causal relationship between remyelination and neuron survival, we manipulated myelinogenesis by conditional deletion of Olig2 (a positive regulator) or muscarinic receptor 1 (M1R, a negative regulator) in OPCs. Deleting Olig2 inhibited remyelination, reducing neuron survival and functional recovery after tMCAO. Conversely, enhancing remyelination by M1R conditional knockout or treatment with the pro-myelination drug clemastine after tMCAO preserved white matter integrity and neuronal survival, accelerating functional recovery. Together, our findings demonstrate that enhancing myelinogenesis is a promising strategy to preserve neurons and promote functional recovery after ischaemic stroke.
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Affiliation(s)
- Yong-Jie Cheng
- Department of Neurosurgery and Key Laboratory of Neurotrauma, 1st affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
- Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Department of Histology and Embryology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Fei Wang
- Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Department of Histology and Embryology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Jie Feng
- Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Department of Histology and Embryology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Bin Yu
- Department of Neurosurgery, 2nd affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Bin Wang
- Department of Physiology, Chongqing Key Laboratory of Neurobiology, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University, Chongqing 400038, China
| | - Qing Gao
- The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Laboratory for Neuroinformation, High-Field Magnetic Resonance Brain Imaging Key Laboratory of Sichuan Province, School of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, PR China
| | - Teng-Yue Wang
- The Clinical Hospital of Chengdu Brain Science Institute, MOE Key Laboratory for Neuroinformation, High-Field Magnetic Resonance Brain Imaging Key Laboratory of Sichuan Province, School of Mathematical Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, PR China
| | - Bo Hu
- Department of Physiology, Chongqing Key Laboratory of Neurobiology, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University, Chongqing 400038, China
| | - Xing Gao
- Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Department of Histology and Embryology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Jing-Fei Chen
- Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Department of Histology and Embryology, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Yu-Jie Chen
- Department of Neurosurgery and Key Laboratory of Neurotrauma, 1st affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Sheng-Qing Lv
- Department of Neurosurgery, 2nd affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Hua Feng
- Department of Neurosurgery and Key Laboratory of Neurotrauma, 1st affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Lan Xiao
- Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Department of Histology and Embryology, Third Military Medical University (Army Medical University), Chongqing 400038, China
- Department of Neurosurgery, 2nd affiliated Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Feng Mei
- Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Department of Histology and Embryology, Third Military Medical University (Army Medical University), Chongqing 400038, China
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Erdoğan MŞ, Arpak ES, Keles CSK, Villagra F, Işık EÖ, Afşar N, Yucesoy CA, Mur LAJ, Akanyeti O, Saybaşılı H. Biochemical, biomechanical and imaging biomarkers of ischemic stroke: Time for integrative thinking. Eur J Neurosci 2024; 59:1789-1818. [PMID: 38221768 DOI: 10.1111/ejn.16245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 12/12/2023] [Accepted: 12/16/2023] [Indexed: 01/16/2024]
Abstract
Stroke is one of the leading causes of adult disability affecting millions of people worldwide. Post-stroke cognitive and motor impairments diminish quality of life and functional independence. There is an increased risk of having a second stroke and developing secondary conditions with long-term social and economic impacts. With increasing number of stroke incidents, shortage of medical professionals and limited budgets, health services are struggling to provide a care that can break the vicious cycle of stroke. Effective post-stroke recovery hinges on holistic, integrative and personalized care starting from improved diagnosis and treatment in clinics to continuous rehabilitation and support in the community. To improve stroke care pathways, there have been growing efforts in discovering biomarkers that can provide valuable insights into the neural, physiological and biomechanical consequences of stroke and how patients respond to new interventions. In this review paper, we aim to summarize recent biomarker discovery research focusing on three modalities (brain imaging, blood sampling and gait assessments), look at some established and forthcoming biomarkers, and discuss their usefulness and complementarity within the context of comprehensive stroke care. We also emphasize the importance of biomarker guided personalized interventions to enhance stroke treatment and post-stroke recovery.
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Affiliation(s)
| | - Esra Sümer Arpak
- Institute of Biomedical Engineering, Boğaziçi University, Istanbul, Turkey
| | - Cemre Su Kaya Keles
- Institute of Biomedical Engineering, Boğaziçi University, Istanbul, Turkey
- Institute of Structural Mechanics and Dynamics in Aerospace Engineering, University of Stuttgart, Stuttgart, Germany
| | - Federico Villagra
- Department of Life Sciences, Aberystwyth University, Aberystwyth, Wales, UK
| | - Esin Öztürk Işık
- Institute of Biomedical Engineering, Boğaziçi University, Istanbul, Turkey
| | - Nazire Afşar
- Neurology, Acıbadem Mehmet Ali Aydınlar University, İstanbul, Turkey
| | - Can A Yucesoy
- Institute of Biomedical Engineering, Boğaziçi University, Istanbul, Turkey
| | - Luis A J Mur
- Department of Life Sciences, Aberystwyth University, Aberystwyth, Wales, UK
| | - Otar Akanyeti
- Department of Computer Science, Llandinam Building, Aberystwyth University, Aberystwyth, UK
| | - Hale Saybaşılı
- Institute of Biomedical Engineering, Boğaziçi University, Istanbul, Turkey
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Tian M, Kawaguchi R, Shen Y, Machnicki M, Villegas NG, Cooper DR, Montgomery N, Haring J, Lan R, Yuan AH, Williams CK, Magaki S, Vinters HV, Zhang Y, De Biase LM, Silva AJ, Carmichael ST. Intercellular Signaling Pathways as Therapeutic Targets for Vascular Dementia Repair. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.24.585301. [PMID: 38585718 PMCID: PMC10996514 DOI: 10.1101/2024.03.24.585301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Vascular dementia (VaD) is a white matter ischemic disease and the second-leading cause of dementia, with no direct therapy. Within the lesion site, cell-cell interactions dictate the trajectory towards disease progression or repair. To elucidate the underlying intercellular signaling pathways, a VaD mouse model was developed for transcriptomic and functional studies. The mouse VaD transcriptome was integrated with a human VaD snRNA-Seq dataset. A custom-made database encompassing 4053 human and 2032 mouse ligand-receptor (L-R) interactions identified significantly altered pathways shared between human and mouse VaD. Two intercellular L-R systems, Serpine2-Lrp1 and CD39-A3AR, were selected for mechanistic study as both the ligand and receptor were dysregulated in VaD. Decreased Seprine2 expression enhances OPC differentiation in VaD repair. A clinically relevant drug that reverses the loss of CD39-A3AR function promotes tissue and behavioral recovery in the VaD model. This study presents novel intercellular signaling targets and may open new avenues for VaD therapies.
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Boseley RE, Sylvain NJ, Peeling L, Kelly ME, Pushie MJ. A review of concepts and methods for FTIR imaging of biomarker changes in the post-stroke brain. BIOCHIMICA ET BIOPHYSICA ACTA. BIOMEMBRANES 2024; 1866:184287. [PMID: 38266967 DOI: 10.1016/j.bbamem.2024.184287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2023] [Revised: 01/11/2024] [Accepted: 01/12/2024] [Indexed: 01/26/2024]
Abstract
Stroke represents a core area of study in neurosciences and public health due to its global contribution toward mortality and disability. The intricate pathophysiology of stroke, including ischemic and hemorrhagic events, involves the interruption in oxygen and nutrient delivery to the brain. Disruption of these crucial processes in the central nervous system leads to metabolic dysregulation and cell death. Fourier transform infrared (FTIR) spectroscopy can simultaneously measure total protein and lipid content along with a number of key biomarkers within brain tissue that cannot be observed using conventional techniques. FTIR imaging provides the opportunity to visualize this information in tissue which has not been chemically treated prior to analysis, thus retaining the spatial distribution and in situ chemical information. Here we present a review of FTIR imaging methods for investigating the biomarker responses in the post-stroke brain.
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Affiliation(s)
- Rhiannon E Boseley
- Department of Surgery, University of Saskatchewan, Saskatoon, SK S7N 0W8, Canada
| | - Nicole J Sylvain
- Department of Surgery, University of Saskatchewan, Saskatoon, SK S7N 0W8, Canada
| | - Lissa Peeling
- Department of Surgery, University of Saskatchewan, Saskatoon, SK S7N 0W8, Canada
| | - Michael E Kelly
- Department of Surgery, University of Saskatchewan, Saskatoon, SK S7N 0W8, Canada
| | - M Jake Pushie
- Department of Surgery, University of Saskatchewan, Saskatoon, SK S7N 0W8, Canada.
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Lau SCL, Connor LT, Skidmore ER. Associations of Circadian Rest-Activity Rhythms With Affect and Cognition in Community-Dwelling Stroke Survivors: An Ambulatory Assessment Study. Neurorehabil Neural Repair 2024; 38:197-206. [PMID: 38318642 DOI: 10.1177/15459683241230027] [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: 02/07/2024]
Abstract
BACKGROUND Rest-activity rhythm (RAR) is a modifiable behavioral factor associated with affect and cognition. Identifying RAR characteristics associated with affect and cognition among stroke survivors provides insight into preventing poststroke affective and cognitive impairment. OBJECTIVE To examine the associations of RAR characteristics with affect and cognition among community-dwelling stroke survivors. METHODS Forty participants with mild stroke (mean age = 52.8; 42.5% female; 55% White) reported their affect and cognitive complaints using ecological momentary assessment and wore an accelerometer for 7 consecutive days and completed the National Institutes of Health Toolbox Cognition Battery. RAR characteristics were extracted using parametric and non-parametric approaches. Multivariable linear regressions were used to identify RAR characteristics associated with affect and cognition. RESULTS Later onset of rest (B = 0.45; P = .008) and activity (B = 0.36; P = .041) were positively associated with depressed affect. These associations were reversed for cheerful effect (rest onset: B = -0.42; P = .017; activity onset: B = -0.39; P = .033). Cheerful affect was also positively associated with relative amplitude (ie, distinctions in activity levels between rest and activity; B = .39; P = .030). Intra-daily variability (ie, RAR fragmentation; B = 0.35; P = .042) and later onset of activity (B = .36; P = .048) were positively associated with cognitive complaints. Less erratic RAR was positively associated with fluid cognition (B = 0.29; P = .036); RAR fragmentation was positively associated with crystallized cognition (B = 0.39; P = .015). CONCLUSIONS We identified RAR correlates of affect and cognition among stroke survivors, highlighting the value of managing RAR and sleep in stroke rehabilitation. Future studies should test whether advancing the onset of rest and activity, promoting a regular active lifestyle, and improving rest and sleep in the nighttime protect stroke survivors from affective and cognitive impairment.
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Affiliation(s)
- Stephen C L Lau
- Program in Occupational Therapy, Washington University School of Medicine, St. Louis, MO, USA
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
- Department of Occupational Therapy, School of Health and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA
| | - Lisa Tabor Connor
- Program in Occupational Therapy, Washington University School of Medicine, St. Louis, MO, USA
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
| | - Elizabeth R Skidmore
- Department of Occupational Therapy, School of Health and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA
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Kim YK, Jo D, Arjunan A, Ryu Y, Lim YH, Choi SY, Kim HK, Song J. Identification of IGF-1 Effects on White Adipose Tissue and Hippocampus in Alzheimer's Disease Mice via Transcriptomic and Cellular Analysis. Int J Mol Sci 2024; 25:2567. [PMID: 38473814 DOI: 10.3390/ijms25052567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 02/17/2024] [Accepted: 02/19/2024] [Indexed: 03/14/2024] Open
Abstract
Alzheimer's disease (AD) stands as the most prevalent neurodegenerative disorder, characterized by a multitude of pathological manifestations, prominently marked by the aggregation of amyloid beta. Recent investigations have revealed a compelling association between excessive adiposity and glial activation, further correlating with cognitive impairments. Additionally, alterations in levels of insulin-like growth factor 1 (IGF-1) have been reported in individuals with metabolic conditions accompanied by memory dysfunction. Hence, our research endeavors to comprehensively explore the impact of IGF-1 on the hippocampus and adipose tissue in the context of Alzheimer's disease. To address this, we have conducted an in-depth analysis utilizing APP/PS2 transgenic mice, recognized as a well-established mouse model for Alzheimer's disease. Upon administering IGF-1 injections to the APP/PS2 mice, we observed notable alterations in their behavioral patterns, prompting us to undertake a comprehensive transcriptomic analysis of both the hippocampal and adipose tissues. Our data unveiled significant modifications in the functional profiles of these tissues. Specifically, in the hippocampus, we identified changes associated with synaptic activity and neuroinflammation. Concurrently, the adipose tissue displayed shifts in processes related to fat browning and cell death signaling. In addition to these findings, our analysis enabled the identification of a collection of long non-coding RNAs and circular RNAs that exhibited significant changes in expression subsequent to the administration of IGF-1 injections. Furthermore, we endeavored to predict the potential roles of these identified RNA molecules within the context of our study. In summary, our study offers valuable transcriptome data for hippocampal and adipose tissues within an Alzheimer's disease model and posits a significant role for IGF-1 within both the hippocampus and adipose tissue.
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Affiliation(s)
- Young-Kook Kim
- Department of Biochemistry, Chonnam National University Medical School, Hwasun 58128, Jeollanamdo, Republic of Korea
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Hwasun 58128, Jeollanamdo, Republic of Korea
| | - Danbi Jo
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Hwasun 58128, Jeollanamdo, Republic of Korea
- Department of Anatomy, Chonnam National University Medical School, Hwasun 58128, Jeollanamdo, Republic of Korea
| | - Archana Arjunan
- Department of Anatomy, Chonnam National University Medical School, Hwasun 58128, Jeollanamdo, Republic of Korea
| | - Yeongseo Ryu
- Department of Biochemistry, Chonnam National University Medical School, Hwasun 58128, Jeollanamdo, Republic of Korea
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Hwasun 58128, Jeollanamdo, Republic of Korea
| | - Yeong-Hwan Lim
- Department of Biochemistry, Chonnam National University Medical School, Hwasun 58128, Jeollanamdo, Republic of Korea
| | - Seo Yoon Choi
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Hwasun 58128, Jeollanamdo, Republic of Korea
- Department of Anatomy, Chonnam National University Medical School, Hwasun 58128, Jeollanamdo, Republic of Korea
| | - Hee Kyung Kim
- Department of Endocrinology and Metabolism, Department of Internal Medicine, Chonnam National University Medical School, Hwasun 58128, Jeollanamdo, Republic of Korea
| | - Juhyun Song
- Biomedical Science Graduate Program (BMSGP), Chonnam National University, Hwasun 58128, Jeollanamdo, Republic of Korea
- Department of Anatomy, Chonnam National University Medical School, Hwasun 58128, Jeollanamdo, Republic of Korea
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李 文, 宋 娟, 张 含, 杨 禄, 岳 宇, 张 新, 王 永. [Effects of α1-antitrypsin on motor function in mice with immature brain white matter injury]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2024; 26:181-187. [PMID: 38436317 PMCID: PMC10921877 DOI: 10.7499/j.issn.1008-8830.2309003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 09/04/2023] [Accepted: 01/11/2024] [Indexed: 03/05/2024]
Abstract
OBJECTIVES To investigate the effects of α1-antitrypsin (AAT) on motor function in adult mice with immature brain white matter injury. METHODS Five-day-old C57BL/6J mice were randomly assigned to the sham surgery group (n=27), hypoxia-ischemia (HI) + saline group (n=27), and HI+AAT group (n=27). The HI white matter injury mouse model was established using HI methods. The HI+AAT group received intraperitoneal injections of AAT (50 mg/kg) 24 hours before HI, immediately after HI, and 72 hours after HI; the HI+saline group received intraperitoneal injections of the same volume of saline at the corresponding time points. Brain T2-weighted magnetic resonance imaging scans were performed at 7 and 55 days after modeling. At 2 months of age, adult mice were evaluated for static, dynamic, and coordination parameters using the Catwalk gait analysis system. RESULTS Compared to the sham surgery group, mice with HI injury showed high signal intensity on brain T2-weighted magnetic resonance imaging at 7 days after modeling, indicating significant white matter injury. The white matter injury persisted at 55 days after modeling. In comparison to the sham surgery group, the HI+saline group exhibited decreased paw print area, maximum contact area, average pressure, maximum pressure, paw print width, average velocity, body velocity, stride length, swing speed, percentage of gait pattern AA, and percentage of inter-limb coordination (left hind paw → left front paw) (P<0.05). The HI+saline group showed increased inter-paw distance, percentage of gait pattern AB, and percentage of phase lag (left front paw → left hind paw) compared to the sham surgery group (P<0.05). In comparison to the HI+saline group, the HI+AAT group showed increased average velocity, body velocity, stride length, and swing speed (right front paw) (P<0.05). CONCLUSIONS The mice with immature brain white matter injury may exhibit significant motor dysfunction in adulthood, while the use of AAT can improve some aspects of their motor function.
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Su H, Yan S, Zhu H, Liu Y, Zhang G, Peng X, Zhang S, Li Y, Zhu W. A normative modeling approach to quantify white matter changes and predict functional outcomes in stroke patients. Front Neurosci 2024; 18:1334508. [PMID: 38379757 PMCID: PMC10877717 DOI: 10.3389/fnins.2024.1334508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 01/12/2024] [Indexed: 02/22/2024] Open
Abstract
Objectives The diverse nature of stroke necessitates individualized assessment, presenting challenges to case-control neuroimaging studies. The normative model, measuring deviations from a normal distribution, provides a solution. We aim to evaluate stroke-induced white matter microstructural abnormalities at group and individual levels and identify potential prognostic biomarkers. Methods Forty-six basal ganglia stroke patients and 46 healthy controls were recruited. Diffusion-weighted imaging and clinical assessment were performed within 7 days after stroke. We used automated fiber quantification to characterize intergroup alterations of segmental diffusion properties along 20 fiber tracts. Then each patient was compared to normative reference (46 healthy participants) by Mahalanobis distance tractometry for 7 significant fiber tracts. Mahalanobis distance-based deviation loads (MaDDLs) and fused MaDDLmulti were extracted to quantify individual deviations. We also conducted correlation and logistic regression analyses to explore relationships between MaDDL metrics and functional outcomes. Results Disrupted microstructural integrity was observed across the left corticospinal tract, bilateral inferior fronto-occipital fasciculus, left inferior longitudinal fasciculus, bilateral thalamic radiation, and right uncinate fasciculus. The correlation coefficients between MaDDL metrics and initial functional impairment ranged from 0.364 to 0.618 (p < 0.05), with the highest being MaDDLmulti. Furthermore, MaDDLmulti demonstrated a significant enhancement in predictive efficacy compared to MaDDL (integrated discrimination improvement [IDI] = 9.62%, p = 0.005) and FA (IDI = 34.04%, p < 0.001) of the left corticospinal tract. Conclusion MaDDLmulti allows for assessing behavioral disorders and predicting prognosis, offering significant implications for personalized clinical decision-making and stroke recovery. Importantly, our method demonstrates prospects for widespread application in heterogeneous neurological diseases.
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Affiliation(s)
| | | | | | | | | | | | | | - Yuanhao Li
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wenzhen Zhu
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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d'Orio P, Squarza S, Revay M, Cardinale F, Castana L, Sartori I, Tassi L, Lo Russo G, Cossu M. Neurological morbidity of surgery for suprasylvian operculoinsular epilepsy. Epilepsia 2024; 65:402-413. [PMID: 38041557 DOI: 10.1111/epi.17844] [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] [Received: 07/24/2023] [Revised: 11/22/2023] [Accepted: 11/30/2023] [Indexed: 12/03/2023]
Abstract
OBJECTIVE The objective of this study was to identify risk factors associated with surgery-related neurological morbidity in patients with drug-resistant epilepsy undergoing suprasylvian operculoinsular resections. As secondary outcomes, we also analyzed the risk factors for ischemic lesion (IL) of corona radiata and seizure recurrence. METHODS A retrospective analysis was conducted on a cohort of patients who underwent suprasylvian operculoinsular resections for drug-resistant epilepsy. The association of several presurgical, surgical, and postsurgical factors with both primary (persistent neurological deficits) and secondary (structural abnormalities on postoperative magnetic resonance imaging [MRI] and seizure recurrence) postoperative outcomes was investigated with univariate and multivariate statistical analysis. RESULTS The study included a total of 65 patients; 46.2% of patients exhibited postoperative neurological deficits, but only 12.3% experienced persistent deficits. On postoperative MRI, IL in the corona radiata and corticospinal tract Wallerian degeneration (CSTWd) were seen in 68% and 29% of cases, respectively. Only CSTWd was significantly associated with persistent neurological deficits (relative risk [RR] = 2.6). Combined operculoinsular resection (RR = 3.62) and surgery performed on the left hemisphere (RR = .37) were independently associated with IL in the corona radiata. Variables independently associated with CSTWd were the presence of malacic components in the IL (RR = 1.96), right central operculum resection (RR = 1.79), and increasing age at surgery (RR = 1.03). Sixty-two patients had a postoperative follow-up > 12 months (median = 56, interquartile range = 30.75-73.5), and 62.9% were in Engel class I at last outpatient control. The risk of seizure recurrence was reduced by selective opercular resection (RR = .25) and increased by the histological diagnosis of aspecific gliosis (RR = 1.39). SIGNIFICANCE This study provides insights into the risk factors associated with surgery-related neurological morbidity, as well as further evidence on the postoperative occurrence of subcortical injury and seizure recurrence in epileptic patients undergoing suprasylvian operculoinsular resections. The findings highlighted in this study may be useful to better understand the processes supporting the increased surgical risk in the operculoinsular region.
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Affiliation(s)
- Piergiorgio d'Orio
- "Claudio Munari" Epilepsy Surgery Center, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Milan, Italy
- Department of Medicine and Surgery, Unit of Neuroscience, University of Parma, Parma, Italy
| | - Silvia Squarza
- Neuroradiology Department, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Martina Revay
- "Claudio Munari" Epilepsy Surgery Center, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Milan, Italy
- Department of Medicine and Surgery, Unit of Neuroscience, University of Parma, Parma, Italy
| | - Francesco Cardinale
- "Claudio Munari" Epilepsy Surgery Center, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Milan, Italy
- Department of Medicine and Surgery, Unit of Neuroscience, University of Parma, Parma, Italy
| | - Laura Castana
- "Claudio Munari" Epilepsy Surgery Center, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Ivana Sartori
- "Claudio Munari" Epilepsy Surgery Center, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Laura Tassi
- "Claudio Munari" Epilepsy Surgery Center, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Giorgio Lo Russo
- "Claudio Munari" Epilepsy Surgery Center, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Milan, Italy
| | - Massimo Cossu
- "Claudio Munari" Epilepsy Surgery Center, Azienda Socio Sanitaria Territoriale Grande Ospedale Metropolitano Niguarda, Milan, Italy
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Guan X, Wu J, Geng J, Ji D, Wei D, Ling Y, Zhang Y, Jiang G, Pang T, Huang Z. A Novel Hybrid of Telmisartan and Borneol Ameliorates Neuroinflammation and White Matter Injury in Ischemic Stroke Through ATF3/CH25H Axis. Transl Stroke Res 2024; 15:195-218. [PMID: 36577854 DOI: 10.1007/s12975-022-01121-5] [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] [Received: 04/27/2022] [Revised: 12/20/2022] [Accepted: 12/23/2022] [Indexed: 12/30/2022]
Abstract
Cerebral ischemic stroke causes substantial white matter injury, which is further aggravated by neuroinflammation mediated by microglia/astrocytes. Given the anti-neuroinflammatory action of telmisartan and the enhancing blood-brain barrier (BBB) permeability potential of resuscitation-inducing aromatic herbs, 13 hybrids (3a-m) of telmisartan (or its simplified analogues) with resuscitation-inducing aromatic agents were designed, synthesized, and biologically evaluated. Among them, the optimal compound 3a (the ester hybrid of telmisartan and (+)-borneol) potently inhibited neuroinflammation mediated by microglia/astrocytes and ameliorated ischemic stroke. Particularly, 3a significantly conferred protection for white matter integrity after cerebral ischemic stroke via decreasing abnormally dephosphorylated neurofilament protein, upregulating myelin basic protein, and attenuating oligodendrocyte damage. Further RNA-sequencing data revealed that 3a upregulated expression of transcriptional regulator ATF3 to reduce the expression of CH25H, prevented proinflammatory state of lipid-droplet-accumulating microglia/astrocytes to limit excessive inflammation, and eventually protected neighboring oligodendrocytes to prevent white matter injury. Taken with the desirable pharmacokinetics behavior and improved brain distribution, 3a may be a feasible therapeutic agent for ischemic stroke and other neurological disorders with white matter injury.
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Affiliation(s)
- Xin Guan
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Drug Discovery, New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, Institute of Pharmaceutical Sciences, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, People's Republic of China
| | - Jianbing Wu
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Drug Discovery, New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, Institute of Pharmaceutical Sciences, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, People's Republic of China
| | - Jiahui Geng
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Drug Discovery, New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, Institute of Pharmaceutical Sciences, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, People's Republic of China
| | - Duorui Ji
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Drug Discovery, New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, Institute of Pharmaceutical Sciences, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, People's Republic of China
| | - Dasha Wei
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Drug Discovery, New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, Institute of Pharmaceutical Sciences, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, People's Republic of China
| | - Yong Ling
- School of Pharmacy, Nantong University, Nantong, 226001, People's Republic of China
| | - Yihua Zhang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Drug Discovery, New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, Institute of Pharmaceutical Sciences, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, People's Republic of China
| | - Guojun Jiang
- Department of Pharmacy, Zhejiang Xiaoshan Hospital, Hangzhou, 311201, People's Republic of China
| | - Tao Pang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Drug Discovery, New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, Institute of Pharmaceutical Sciences, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, People's Republic of China.
- State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, 210023, People's Republic of China.
| | - Zhangjian Huang
- State Key Laboratory of Natural Medicines, Jiangsu Key Laboratory of Drug Discovery for Metabolic Diseases, Center of Drug Discovery, New Drug Screening Center, Jiangsu Center for Pharmacodynamics Research and Evaluation, Institute of Pharmaceutical Sciences, China Pharmaceutical University, #24 Tong Jia Xiang Street, Nanjing, 210009, People's Republic of China.
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15
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Khaksar S, Bigdeli M, Mohammadi R. Expression of Na +/Ca 2+ exchangers was enhanced following pre-treatment of olive leaf extract and olive oil in animal model of ischemic stroke. Int J Neurosci 2024:1-15. [PMID: 38153337 DOI: 10.1080/00207454.2023.2300732] [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: 07/25/2023] [Accepted: 12/26/2023] [Indexed: 12/29/2023]
Abstract
BACKGROUND Neuroprotective role of olive and its natural products can introduce them as alternative candidates for the management of neurodegenerative diseases including stroke. The present study was designed to evaluate whether pretreatment of olive oil and leaf extract can attenuate the most important destructive processes in cerebral ischemia called excitotoxicity. MATERIAL AND METHODS The male rats were categorized into control, virgin olive oil (OVV), MCAO, MCAO + OVV (with doses of 0.25, 0.50 and 0.75 ml/kg as treatment groups), olive leaf extract, MCAO + olive leaf extract (with doses 50, 75 and 100 mg/kg as treatment groups) groups. Rats of treatment groups received gastric gavage with olive oil or leaf extract for 30 consecutive days. After pretreatment, the intraluminal filament technique was used to block middle cerebral artery (MCA) transiently. Neurological deficits, infarct volume and expression of Na+/Ca2+ exchangers (NCX1, NCX2 and NCX3) proteins were measured. RESULTS The results revealed that olive oil at doses of 0.50 and 0.75 ml/kg reduced the infarction and neurological score and upregulated NCXs expression in rat brain. In addition, olive leaf extract at doses of 75 and 100 mg/kg attenuated the infarction and neurological score and enhanced NCXs expression in rat brain. CONCLUSION These findings support the view that olive oil and leaf extract play the neuroprotective role in cerebral ischemia due to the upregulation of NCXs protein expression.
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Affiliation(s)
- Sepideh Khaksar
- Department of Plant Sciences, Faculty of biological Sciences, Alzahra University, Tehran, Iran
| | - Mohammadreza Bigdeli
- Department of Animal Sciences and Marine Biology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
- Institute for Cognitive and Brain Science, Shahid Beheshti University, Tehran, Iran
| | - Raziyeh Mohammadi
- Department of Animal Sciences and Marine Biology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University, Tehran, Iran
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16
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Jia J, Xu S, Hu J, Gan Y, Sun M, Xia S, Bao X, Zhang M, Xu Y. Growth arrest specific protein 6 alleviated white matter injury after experimental ischemic stroke. J Cereb Blood Flow Metab 2024; 44:77-93. [PMID: 37794790 PMCID: PMC10905636 DOI: 10.1177/0271678x231205078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 09/09/2023] [Accepted: 09/11/2023] [Indexed: 10/06/2023]
Abstract
Ischemic white matter injury leads to long-term neurological deficits and lacks effective medication. Growth arrest specific protein 6 (Gas6) clears myelin debris, which is hypothesized to promote white matter integrity in experimental stroke models. By the middle cerebral artery occlusion (MCAO) stroke model, we observed that Gas6 reduced infarcted volume and behavior deficits 4 weeks after MCAO. Compared with control mice, Gas6-treatment mice represented higher FA values in the ipsilateral external capsules by MRI DTI scan. The SMI32/MBP ratio of the ipsilateral cortex and striatum was profoundly alleviated by Gas6 administration. Gas6-treatment group manifested thicker myelin sheaths than the control group by electron microscopy. We observed that Gas6 mainly promoted OPC maturation, which was closely related to microglia. Mechanically, Gas6 accelerated microglia-mediated myelin debris clearance and cholesterol transport protein expression (abca1, abcg1, apoc1, apoe) in vivo and in vitro, accordingly less myelin debris and lipid deposited in Gas6 treated stroke mice. HX531 (RXR inhibitor) administration mitigated the functions of Gas6 in speeding up debris clearance and cholesterol transport protein expression. Generally, we concluded that Gas6 cleared myelin debris and promoted cholesterol transportation protein expression through activating RXR, which could be one critical mechanism contributing to white matter repair after stroke.
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Affiliation(s)
- Junqiu Jia
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Siyi Xu
- Department of Neurology, Nanjing Drum Tower Hospital Clinical College of Jiangsu University, Zhenjiang, China
| | - Jinglong Hu
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Yonghui Gan
- Department of Neurology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, China
| | - Min Sun
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Shengnan Xia
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Xinyu Bao
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
| | - Meijuan Zhang
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
- Department of Neurology, Nanjing Drum Tower Hospital Clinical College of Nanjing University of Chinese Medicine, Nanjing, China
- Department of Neurology, Nanjing Drum Tower Hospital, State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, China
- Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, China
- Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, China
| | - Yun Xu
- Department of Neurology, Nanjing Drum Tower Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, China
- Department of Neurology, Nanjing Drum Tower Hospital Clinical College of Jiangsu University, Zhenjiang, China
- Department of Neurology, Nanjing Drum Tower Hospital, State Key Laboratory of Pharmaceutical Biotechnology and Institute of Translational Medicine for Brain Critical Diseases, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, China
- Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, China
- Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, China
- Jiangsu Provincial medical key discipline, Nanjing, China
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Yang K, Tan J, Deng Y, Jiang S, Tang J, Shi W, Yu B. Debris generated by laser and/or balloon cause cerebral infarction with different severity. Lasers Med Sci 2023; 39:15. [PMID: 38135785 DOI: 10.1007/s10103-023-03904-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 10/04/2023] [Indexed: 12/24/2023]
Abstract
The purpose of this study is to determine the effects that debris generated by laser and/or balloon on the brain. Debris generated by laser, balloon, and laser combined with balloon were collected and then injected into rats' left common carotid artery. Rats were divided into five groups: sham, saline, laser (L), balloon (B), and laser combined with balloon (LB). The cognition ability of rats was evaluated by Morris water maze. Cerebral blood flow (CBF) was examined by laser speckle. TTC staining and MRI scan were conducted to detect cerebral ischemic infarction. Intracranial arteries in rats were visualized by MRI angiography via contrast medium injected via tail vein. Immunohistologic staining for NeuN and Iba1 and hematoxylin-eosin staining were performed to assess brain infarction. White matter demyelination was assessed by Luxol fast blue staining. Long-term memory and CBF of rats in different groups exhibited no significant difference. No obstruction sign in intracranial artery tree was noticed in each group. Debris generated by different treatments all caused brain infarction. Infarction lesion caused by debris produced by balloon was much more severe than the one caused by debris generated by laser. While the LB group lay in between. The thickness of white matter decreased in the B group, but not in the L and LB groups. Rat brain has a tolerance for debris as cognition ability and cerebral blood flow are not significantly declined. The severity of cerebral infarction varies by debris generated by different treatments.
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Affiliation(s)
- Kai Yang
- Department of Vascular Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, 2800 Gongwei Road, Pudong, 201399, Shanghai, China
- Department of Vascular Surgery, Huashan Hospital, Fudan University, 12 Urumqi Middle Road, Jingan, 200040, Shanghai, China
- Shanghai Key Laboratory of Vascular Lesions Regulation and Remodeling, Fudan University Pudong Medical Center, 2800 Gongwei Road, 201399, Shanghai, China
| | - Jinyun Tan
- Department of Vascular Surgery, Huashan Hospital, Fudan University, 12 Urumqi Middle Road, Jingan, 200040, Shanghai, China
- Shanghai Key Laboratory of Vascular Lesions Regulation and Remodeling, Fudan University Pudong Medical Center, 2800 Gongwei Road, 201399, Shanghai, China
- Zhangjiang Institute, Fudan University, 1688 Guoquan North Road, Yangpu, 201203, Shanghai, China
| | - Ying Deng
- Department of Vascular Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, 2800 Gongwei Road, Pudong, 201399, Shanghai, China
- Shanghai Key Laboratory of Vascular Lesions Regulation and Remodeling, Fudan University Pudong Medical Center, 2800 Gongwei Road, 201399, Shanghai, China
| | - Shuai Jiang
- Department of Vascular Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, 2800 Gongwei Road, Pudong, 201399, Shanghai, China
- Shanghai Key Laboratory of Vascular Lesions Regulation and Remodeling, Fudan University Pudong Medical Center, 2800 Gongwei Road, 201399, Shanghai, China
| | - Jingdong Tang
- Department of Vascular Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, 2800 Gongwei Road, Pudong, 201399, Shanghai, China
- Shanghai Key Laboratory of Vascular Lesions Regulation and Remodeling, Fudan University Pudong Medical Center, 2800 Gongwei Road, 201399, Shanghai, China
| | - Weihao Shi
- Department of Vascular Surgery, Huashan Hospital, Fudan University, 12 Urumqi Middle Road, Jingan, 200040, Shanghai, China
- Shanghai Key Laboratory of Vascular Lesions Regulation and Remodeling, Fudan University Pudong Medical Center, 2800 Gongwei Road, 201399, Shanghai, China
| | - Bo Yu
- Department of Vascular Surgery, Shanghai Pudong Hospital, Fudan University Pudong Medical Center, 2800 Gongwei Road, Pudong, 201399, Shanghai, China.
- Shanghai Key Laboratory of Vascular Lesions Regulation and Remodeling, Fudan University Pudong Medical Center, 2800 Gongwei Road, 201399, Shanghai, China.
- Zhangjiang Institute, Fudan University, 1688 Guoquan North Road, Yangpu, 201203, Shanghai, China.
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18
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Benarroch E. What Are the Roles of Oligodendrocyte Precursor Cells in Normal and Pathologic Conditions? Neurology 2023; 101:958-965. [PMID: 37985182 PMCID: PMC10663025 DOI: 10.1212/wnl.0000000000208000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 09/25/2023] [Indexed: 11/22/2023] Open
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19
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Li C, Lu P, Zhang L, He Y, Zhang L, Yang L, Zhang F, Kong X, Tao Q, Zhou J, Wu J, Peng T, Xie B, Jiang Y, Peng J. Apolipoprotein E Polymorphism Impacts White Matter Injury Through Microglial Phagocytosis After Experimental Subarachnoid Hemorrhage. Neuroscience 2023; 524:220-232. [PMID: 37290684 DOI: 10.1016/j.neuroscience.2023.05.020] [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] [Received: 01/26/2023] [Revised: 05/19/2023] [Accepted: 05/23/2023] [Indexed: 06/10/2023]
Abstract
Apolipoprotein E (apoE, protein; APOE, gene), divided into three alleles of E2, E3 and E4 in humans, is associated with the progression of white matter lesion load. However, mechanism evidence has not been reported regarding the APOE genotype in early white matter injury (WMI) under subarachnoid hemorrhage (SAH) conditions. In the present study, we investigated the effects of APOE gene polymorphisms, by constructing microglial APOE3 and APOE4-specific overexpression, on WMI and underlying mechanisms of microglia phagocytosis in a mice model of SAH. A total of 167 male C57BL/6J mice (weight 22-26 g) were used. SAH and bleeding environment were induced by endovascular perforation in vivo and oxyHb in vitro, respectively. Multi-technology approaches, including immunohistochemistry, high throughput sequencing, gene editing for adeno-associated viruses, and several molecular biotechnologies were used to validate the effects of APOE polymorphisms on microglial phagocytosis and WMI after SAH. Our results revealed that APOE4 significantly aggravated the WMI and decreased neurobehavioral function by impairing microglial phagocytosis after SAH. Indicators negatively associated with microglial phagocytosis increased like CD16, CD86 and the ratio of CD16/CD206, while the indicators positively associated with microglial phagocytosis decreased like Arg-1 and CD206. The increased ROS and aggravating mitochondrial damage demonstrated that the damaging effects of APOE4 in SAH may be associated with microglial oxidative stress-dependent mitochondrial damage. Inhibiting mitochondrial oxidative stress by Mitoquinone (mitoQ) can enhance the phagocytic function of microglia. In conclusion, anti-oxidative stress and phagocytosis protection may serve as promising treatments in the management of SAH.
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Affiliation(s)
- Chaojie Li
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Peng Lu
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Lihan Zhang
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Yijing He
- Institute of Epigenetics and Brain Science, Southwest Medical University, Luzhou 646000, China
| | - Lifang Zhang
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China; Sichuan Clinical Research Center for Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Lei Yang
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Fan Zhang
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Xi Kong
- Institute of Epigenetics and Brain Science, Southwest Medical University, Luzhou 646000, China
| | - Qianke Tao
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Jian Zhou
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China; Sichuan Clinical Research Center for Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Jinpeng Wu
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Tangming Peng
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China
| | - Bingqing Xie
- Institute of Epigenetics and Brain Science, Southwest Medical University, Luzhou 646000, China
| | - Yong Jiang
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China; Laboratory of Neurological Diseases and Brain Function, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China; Institute of Epigenetics and Brain Science, Southwest Medical University, Luzhou 646000, China.
| | - Jianhua Peng
- Department of Neurosurgery, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China; Laboratory of Neurological Diseases and Brain Function, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China; Institute of Epigenetics and Brain Science, Southwest Medical University, Luzhou 646000, China; Academician (Expert) Workstation of Sichuan Province, the Affiliated Hospital of Southwest Medical University, Luzhou 646000, China.
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20
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Karkoska KA, Gollamudi J, Hyacinth HI. Molecular and environmental contributors to neurological complications in sickle cell disease. Exp Biol Med (Maywood) 2023; 248:1319-1332. [PMID: 37688519 PMCID: PMC10625341 DOI: 10.1177/15353702231187646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/11/2023] Open
Abstract
Sickle cell disease (SCD) is an inherited hemoglobinopathy in which affected hemoglobin polymerizes under hypoxic conditions resulting in red cell distortion and chronic hemolytic anemia. SCD affects millions of people worldwide, primarily in Sub-Saharan Africa and the Indian subcontinent. Due to vaso-occlusion of sickled red cells within the microvasculature, SCD affects virtually every organ system and causes significant morbidity and early mortality. The neurological complications of SCD are particularly devastating and diverse, ranging from overt stroke to covert cerebral injury, including silent cerebral infarctions and blood vessel tortuosity. However, even individuals without evidence of neuroanatomical changes in brain imaging have evidence of cognitive deficits compared to matched healthy controls likely due to chronic cerebral hypoxemia and neuroinflammation. In this review, we first examined the biological contributors to SCD-related neurological complications and then discussed the equally important socioenvironmental contributors. We then discuss the evidence for neuroprotection from the two primary disease-modifying therapies, chronic monthly blood transfusions and hydroxyurea, and end with several experimental therapies designed to specifically target these complications.
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Affiliation(s)
- Kristine A Karkoska
- Division of Hematology & Oncology, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45219-0525, USA
| | - Jahnavi Gollamudi
- Division of Hematology & Oncology, Department of Internal Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45219-0525, USA
| | - Hyacinth I Hyacinth
- Department of Neurology & Rehabilitation Medicine, University of Cincinnati College of Medicine, Cincinnati, OH 45267-0525, USA
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21
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Novorolsky RJ, Kasheke GDS, Hakim A, Foldvari M, Dorighello GG, Sekler I, Vuligonda V, Sanders ME, Renden RB, Wilson JJ, Robertson GS. Preserving and enhancing mitochondrial function after stroke to protect and repair the neurovascular unit: novel opportunities for nanoparticle-based drug delivery. Front Cell Neurosci 2023; 17:1226630. [PMID: 37484823 PMCID: PMC10360135 DOI: 10.3389/fncel.2023.1226630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Accepted: 06/22/2023] [Indexed: 07/25/2023] Open
Abstract
The neurovascular unit (NVU) is composed of vascular cells, glia, and neurons that form the basic component of the blood brain barrier. This intricate structure rapidly adjusts cerebral blood flow to match the metabolic needs of brain activity. However, the NVU is exquisitely sensitive to damage and displays limited repair after a stroke. To effectively treat stroke, it is therefore considered crucial to both protect and repair the NVU. Mitochondrial calcium (Ca2+) uptake supports NVU function by buffering Ca2+ and stimulating energy production. However, excessive mitochondrial Ca2+ uptake causes toxic mitochondrial Ca2+ overloading that triggers numerous cell death pathways which destroy the NVU. Mitochondrial damage is one of the earliest pathological events in stroke. Drugs that preserve mitochondrial integrity and function should therefore confer profound NVU protection by blocking the initiation of numerous injury events. We have shown that mitochondrial Ca2+ uptake and efflux in the brain are mediated by the mitochondrial Ca2+ uniporter complex (MCUcx) and sodium/Ca2+/lithium exchanger (NCLX), respectively. Moreover, our recent pharmacological studies have demonstrated that MCUcx inhibition and NCLX activation suppress ischemic and excitotoxic neuronal cell death by blocking mitochondrial Ca2+ overloading. These findings suggest that combining MCUcx inhibition with NCLX activation should markedly protect the NVU. In terms of promoting NVU repair, nuclear hormone receptor activation is a promising approach. Retinoid X receptor (RXR) and thyroid hormone receptor (TR) agonists activate complementary transcriptional programs that stimulate mitochondrial biogenesis, suppress inflammation, and enhance the production of new vascular cells, glia, and neurons. RXR and TR agonism should thus further improve the clinical benefits of MCUcx inhibition and NCLX activation by increasing NVU repair. However, drugs that either inhibit the MCUcx, or stimulate the NCLX, or activate the RXR or TR, suffer from adverse effects caused by undesired actions on healthy tissues. To overcome this problem, we describe the use of nanoparticle drug formulations that preferentially target metabolically compromised and damaged NVUs after an ischemic or hemorrhagic stroke. These nanoparticle-based approaches have the potential to improve clinical safety and efficacy by maximizing drug delivery to diseased NVUs and minimizing drug exposure in healthy brain and peripheral tissues.
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Affiliation(s)
- Robyn J. Novorolsky
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Brain Repair Centre, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Gracious D. S. Kasheke
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Brain Repair Centre, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Antoine Hakim
- School of Pharmacy, Faculty of Science, University of Waterloo, Waterloo, ON, Canada
| | - Marianna Foldvari
- School of Pharmacy, Faculty of Science, University of Waterloo, Waterloo, ON, Canada
| | - Gabriel G. Dorighello
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Brain Repair Centre, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
| | - Israel Sekler
- Department of Physiology and Cell Biology, Faculty of Health Sciences, Ben Gurion University, Beersheva, Israel
| | | | | | - Robert B. Renden
- Department of Physiology and Cell Biology, School of Medicine, University of Nevada, Reno, NV, United States
| | - Justin J. Wilson
- Department of Chemistry and Chemical Biology, College of Arts and Sciences, Cornell University, Ithaca, NY, United States
| | - George S. Robertson
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Brain Repair Centre, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
- Department of Psychiatry, Faculty of Medicine, Dalhousie University, Halifax, NS, Canada
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22
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Nie L, Yao D, Chen S, Wang J, Pan C, Wu D, Liu N, Tang Z. Directional induction of neural stem cells, a new therapy for neurodegenerative diseases and ischemic stroke. Cell Death Discov 2023; 9:215. [PMID: 37393356 DOI: 10.1038/s41420-023-01532-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2023] [Revised: 06/16/2023] [Accepted: 06/22/2023] [Indexed: 07/03/2023] Open
Abstract
Due to the limited capacity of the adult mammalian brain to self-repair and regenerate, neurological diseases, especially neurodegenerative disorders and stroke, characterized by irreversible cellular damage are often considered as refractory diseases. Neural stem cells (NSCs) play a unique role in the treatment of neurological diseases for their abilities to self-renew and form different neural lineage cells, such as neurons and glial cells. With the increasing understanding of neurodevelopment and advances in stem cell technology, NSCs can be obtained from different sources and directed to differentiate into a specific neural lineage cell phenotype purposefully, making it possible to replace specific cells lost in some neurological diseases, which provides new approaches to treat neurodegenerative diseases as well as stroke. In this review, we outline the advances in generating several neuronal lineage subtypes from different sources of NSCs. We further summarize the therapeutic effects and possible therapeutic mechanisms of these fated specific NSCs in neurological disease models, with special emphasis on Parkinson's disease and ischemic stroke. Finally, from the perspective of clinical translation, we compare the strengths and weaknesses of different sources of NSCs and different methods of directed differentiation, and propose future research directions for directed differentiation of NSCs in regenerative medicine.
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Affiliation(s)
- Luwei Nie
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Dabao Yao
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Shiling Chen
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Jingyi Wang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Chao Pan
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China
| | - Dongcheng Wu
- Department of Biochemistry and Molecular Biology, Wuhan University School of Basic Medical Sciences, Wuhan, 430030, China
- Wuhan Hamilton Biotechnology Co., Ltd., Wuhan, 430030, China
| | - Na Liu
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
| | - Zhouping Tang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, Hubei, China.
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23
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Chen J, Xu S, Lee H, Wu L, He X, Zhao W, Zhang M, Ma Y, Ding Y, Fu Y, Wu C, Li M, Jiang M, Cheng H, Li S, Ma T, Ji X, Wu D. Hypothermic neuroprotection by targeted cold autologous blood transfusion in a non-human primate stroke model. Sci Bull (Beijing) 2023:S2095-9273(23)00392-4. [PMID: 37391345 DOI: 10.1016/j.scib.2023.06.017] [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: 03/02/2023] [Revised: 05/06/2023] [Accepted: 06/12/2023] [Indexed: 07/02/2023]
Abstract
Over decades, nearly all attempts to translate the benefits of therapeutic hypothermia in stroke models of lower-order species to stroke patients have failed. Potentially overlooked reasons may be biological gaps between different species and the mismatched initiation of therapeutic hypothermia in translational studies. Here, we introduce a novel strategy of selective therapeutic hypothermia in a non-human primate ischemia-reperfusion model, in which autologous blood was cooled ex vivo and the cool blood transfusion was administered at the middle cerebral artery just after the onset of reperfusion. Cold autologous blood cooled the targeted brain rapidly to below 34 °C while the rectal temperature remained around 36 °C with the assistance of a heat blanket during a 2-h hypothermic process. Therapeutic hypothermia or extracorporeal-circulation related complications were not observed. Cold autologous blood treatment reduced infarct sizes, preserved white matter integrity, and improved functional outcomes. Together, our results suggest that therapeutic hypothermia, induced by cold autologous blood transfusion, was achieved in a feasible, swift, and safe way in a non-human primate model of stroke. More importantly, this novel hypothermic approach conferred neuroprotection in a clinically relevant model of ischemic stroke due to reduced brain damage and improved neurofunction. This study reveals an underappreciated potential for this novel hypothermic modality for acute ischemic stroke in the era of effective reperfusion.
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Affiliation(s)
- Jian Chen
- Department of Neurosurgery, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China
| | - Shuaili Xu
- China-America Institute of Neuroscience, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China
| | - Hangil Lee
- Department of Neurological Surgery, Wayne State University School of Medicine, Detroit MI 46801, USA
| | - Longfei Wu
- Department of Neurology, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China
| | - Xiaoduo He
- China-America Institute of Neuroscience, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China
| | - Wenbo Zhao
- Department of Neurology, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China
| | - Mo Zhang
- Department of Radiology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Yanhui Ma
- Department of Anesthesiology, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China
| | - Yuchuan Ding
- Department of Neurological Surgery, Wayne State University School of Medicine, Detroit MI 46801, USA
| | - Yongjuan Fu
- Department of Pathology, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China
| | - Chuanjie Wu
- Department of Neurology, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China
| | - Ming Li
- Department of Neurosurgery, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China; Beijing Key Laboratory of Hypoxia Conditioning Translational Medicine, Beijing 100053, China
| | - Miuwen Jiang
- Interdisciplinary Innovation Institute of Medicine and Engineering, Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China
| | - Huakun Cheng
- Department of Neurosurgery, Heilongjiang Provincial Hospital, Harbin 1500036, China
| | - Shengli Li
- Department of Laboratory Animal Science, Capital Medical University, Beijing 100069, China
| | - Ting Ma
- Department of Anesthesiology, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China.
| | - Xunming Ji
- Department of Neurosurgery, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China; Beijing Key Laboratory of Hypoxia Conditioning Translational Medicine, Beijing 100053, China; Interdisciplinary Innovation Institute of Medicine and Engineering, Beijing Advanced Innovation Center for Big Data-Based Precision Medicine, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
| | - Di Wu
- China-America Institute of Neuroscience, Xuanwu Hospital, Beijing Institute of Brain Disorders, Capital Medical University, Beijing 100053, China.
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24
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Duque ACM, Cuesta TAC, Melo ADS, Lima Maldonado I. Right hemisphere and metaphor comprehension: A connectionist perspective. Neuropsychologia 2023; 187:108618. [PMID: 37321404 DOI: 10.1016/j.neuropsychologia.2023.108618] [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: 09/26/2022] [Revised: 04/11/2023] [Accepted: 06/10/2023] [Indexed: 06/17/2023]
Abstract
Metaphor comprehension is a cognitively complex task, with evidence pointing to the engagement of multiple cerebral areas. In addition, the involvement of the right hemisphere appears to vary with cognitive effort. Therefore, the interconnecting pathways of such distributed cortical centers should be taken into account when studying this topic. Despite this, the potential contribution of white matter fasciculi has received very little attention in the literature to date and is not mentioned in most metaphor comprehension studies. To highlight the probable implications of the right inferior fronto-occipital fasciculus, right superior longitudinal system, and callosal radiations, we bring together findings from different research fields. The aim is to describe important insights enabled by the cross-fertilization of functional neuroimaging, clinical findings, and structural connectivity.
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Affiliation(s)
- Anna Clara Mota Duque
- Programa de Pós-Graduação em Medicina e Saúde, Universidade Federal da Bahia, Salvador, Brazil; Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Taryn Ariadna Castro Cuesta
- Programa de Pós-Graduação em Medicina e Saúde, Universidade Federal da Bahia, Salvador, Brazil; Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Ailton de Souza Melo
- Programa de Pós-Graduação em Medicina e Saúde, Universidade Federal da Bahia, Salvador, Brazil; Faculdade de Medicina da Bahia, Universidade Federal da Bahia, Salvador, Brazil
| | - Igor Lima Maldonado
- Programa de Pós-Graduação em Medicina e Saúde, Universidade Federal da Bahia, Salvador, Brazil; Dep. Biomorfologia, Instituto de Ciências da Saúde, Universidade Federal da Bahia, Salvador, Brazil; UMR 1253, iBrain, Université de Tours, Inserm, Tours, France.
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25
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Frazier AP, Mitchell DN, Given KS, Hunn G, Burch AM, Childs CR, Moreno-Garcia M, Corigilano MR, Quillinan N, Macklin WB, Herson PS, Dingman AL. Chronic changes in oligodendrocyte sub-populations after middle cerebral artery occlusion in neonatal mice. Glia 2023; 71:1429-1450. [PMID: 36794545 DOI: 10.1002/glia.24349] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 01/23/2023] [Accepted: 01/25/2023] [Indexed: 02/17/2023]
Abstract
Neonatal stroke is common and causes life-long motor and cognitive sequelae. Because neonates with stroke are not diagnosed until days-months after the injury, chronic targets for repair are needed. We evaluated oligodendrocyte maturity and myelination and assessed oligodendrocyte gene expression changes using single cell RNA sequencing (scRNA seq) at chronic timepoints in a mouse model of neonatal arterial ischemic stroke. Mice underwent 60 min of transient right middle cerebral artery occlusion (MCAO) on postnatal day 10 (p10) and received 5-ethynyl-2'-deoxyuridine (EdU) on post-MCAO days 3-7 to label dividing cells. Animals were sacrificed 14 and 28-30 days post-MCAO for immunohistochemistry and electron microscopy. Oligodendrocytes were isolated from striatum 14 days post-MCAO for scRNA seq and differential gene expression analysis. The density of Olig2+ EdU+ cells was significantly increased in ipsilateral striatum 14 days post-MCAO and the majority of oligodendrocytes were immature. Density of Olig2+ EdU+ cells declined significantly between 14 and 28 days post-MCAO without a concurrent increase in mature Olig2+ EdU+ cells. By 28 days post-MCAO there were significantly fewer myelinated axons in ipsilateral striatum. scRNA seq identified a cluster of "disease associated oligodendrocytes (DOLs)" specific to the ischemic striatum, with increased expression of MHC class I genes. Gene ontology analysis suggested decreased enrichment of pathways involved in myelin production in the reactive cluster. Oligodendrocytes proliferate 3-7 days post-MCAO and persist at 14 days, but fail to mature by 28 days. MCAO induces a subset of oligodendrocytes with reactive phenotype, which may be a therapeutic target to promote white matter repair.
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Affiliation(s)
- Alexandra P Frazier
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Danae N Mitchell
- Department of Pediatrics, Division of Child Neurology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Katherine S Given
- Department of Developmental and Cell Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Genevieve Hunn
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Amelia M Burch
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Christine R Childs
- Department of Dermatology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Myriam Moreno-Garcia
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Michael R Corigilano
- Department of Graduate Medical Education, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Nidia Quillinan
- Department of Anesthesiology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Wendy B Macklin
- Department of Developmental and Cell Biology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Paco S Herson
- Department of Neurosurgery, The Ohio State University, Columbus, Ohio, USA
| | - Andra L Dingman
- Department of Pediatrics, Division of Child Neurology, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
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26
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Dong W, Gong T, Zhao S, Wen S, Chen Q, Jiang M, Ye W, Huang Q, Wang C, Yang C, Liu X, Wang Y. A novel extract from Ginkgo biloba inhibits neuroinflammation and maintains white matter integrity in experimental stroke. Neuroscience 2023:S0306-4522(23)00226-9. [PMID: 37225050 DOI: 10.1016/j.neuroscience.2023.05.015] [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: 02/12/2023] [Revised: 05/10/2023] [Accepted: 05/16/2023] [Indexed: 05/26/2023]
Abstract
Ginkgo biloba L. leaf extract (GBE) has been added in many commercial herbal formulations such as EGb 761 and Shuxuening Injection to treat cardiovascular diseases and stroke worldwide. However, the comprehensive effects of GBE on cerebral ischemia remained unclear. Using a novel GBE (nGBE), which consists of all the compounds of traditional (t)GBE and one new compound, pinitol, we investigated its effect on inflammation, white matter integrity, and long-term neurological function in an experimental stroke model. Both transient middle cerebral artery occlusion (MCAO) and distal MCAO were conducted in male C57/BL6 mice. We found that nGBE significantly reduced infarct volume at 1, 3, and 14 days after ischemia. Sensorimotor and cognitive functions were superior in nGBE treated mice after MCAO. nGBE inhibited the release of IL-1β in the brain, promoted microglial ramification, and regulated the microglial M1 to M2 phenotype shift at 7 days post injury. In vitro analyses showed that nGBE treatment reduced the production of IL-1β and TNFα in primary microglia. Administration of nGBE also decreased the SMI-32/MBP ratio and enhanced myelin integrity, thus exhibiting improved white matter integrity at 28 days post stroke. These findings demonstrate that nGBE protects against cerebral ischemia by inhibiting microglia-related inflammation and promoting white matter repair, suggesting that nGBE is a promising therapeutic strategy for long-term recovery after stroke.
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Affiliation(s)
- Wen Dong
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China
| | - Ting Gong
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China; Department of Biomedicine, Beijing City University, Beijing, 100094, P.R. China
| | - Shunying Zhao
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China
| | - Shaohong Wen
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China
| | - Qingfang Chen
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China
| | - Mingyu Jiang
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China
| | - Weizhen Ye
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China
| | - Qiuru Huang
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China
| | - Chunjuan Wang
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China; Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China
| | - Chunmei Yang
- Department of Biomedicine, Beijing City University, Beijing, 100094, P.R. China
| | - Xiangrong Liu
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China
| | - Yongjun Wang
- China National Clinical Research Center for Neurological Diseases, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China; Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, 100070, P.R. China.
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27
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Yi C, Verkhratsky A, Niu J. Pathological potential of oligodendrocyte precursor cells: terra incognita. Trends Neurosci 2023:S0166-2236(23)00103-0. [PMID: 37183154 DOI: 10.1016/j.tins.2023.04.003] [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: 01/08/2023] [Revised: 03/12/2023] [Accepted: 04/13/2023] [Indexed: 05/16/2023]
Abstract
Adult oligodendrocyte precursor cells (aOPCs), transformed from fetal OPCs, are idiosyncratic neuroglia of the central nervous system (CNS) that are distinct in many ways from other glial cells. OPCs have been classically studied in the context of their remyelinating capacity. Recent studies, however, revealed that aOPCs not only contribute to post-lesional remyelination but also play diverse crucial roles in multiple neurological diseases. In this review we briefly present the physiology of aOPCs and summarize current knowledge of the beneficial and detrimental roles of aOPCs in different CNS diseases. We discuss unique features of aOPC death, reactivity, and changes during senescence, as well as aOPC interactions with other glial cells and pathological remodeling during disease. Finally, we outline future perspectives for the study of aOPCs in brain pathologies which may instigate the development of aOPC-targeting therapeutic strategies.
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Affiliation(s)
- Chenju Yi
- Research Centre, Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen 518107, China; Department of Pathology, First Affiliated Hospital of Gannan Medical University, Ganzhou, 341000, China; Shenzhen Key Laboratory of Chinese Medicine Active Substance Screening and Translational Research, Shenzhen 518107, China; Guangdong Provincial Key Laboratory of Brain Function and Disease, Guangzhou, China.
| | - Alexei Verkhratsky
- Faculty of Biology, Medicine, and Health, University of Manchester, Manchester M13 9PL, UK; Achucarro Centre for Neuroscience, Basque Foundation for Science (IKERBASQUE), Bilbao 48011, Spain; Department of Stem Cell Biology, State Research Institute Centre for Innovative Medicine, LT-01102 Vilnius, Lithuania; Department of Forensic Analytical Toxicology, School of Forensic Medicine, China Medical University, Shenyang, China.
| | - Jianqin Niu
- Department of Histology and Embryology, Chongqing Key Laboratory of Neurobiology, Brain and Intelligence Research Key Laboratory of Chongqing Education Commission, Third Military Medical University, Chongqing 400038, China.
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28
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Wang M, Thomson AW, Yu F, Hazra R, Junagade A, Hu X. Regulatory T lymphocytes as a therapy for ischemic stroke. Semin Immunopathol 2023; 45:329-346. [PMID: 36469056 PMCID: PMC10239790 DOI: 10.1007/s00281-022-00975-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 11/17/2022] [Indexed: 12/09/2022]
Abstract
Unrestrained excessive inflammatory responses exacerbate ischemic brain injury and impede post-stroke brain recovery. CD4+CD25+Foxp3+ regulatory T (Treg) cells play important immunosuppressive roles to curtail inflammatory responses and regain immune homeostasis after stroke. Accumulating evidence confirms that Treg cells are neuroprotective at the acute stage after stroke and promote brain repair at the chronic phases. The beneficial effects of Treg cells are mediated by diverse mechanisms involving cell-cell interactions and soluble factor release. Multiple types of cells, including both immune cells and non-immune CNS cells, have been identified to be cellular targets of Treg cells. In this review, we summarize recent findings regarding the function of Treg cells in ischemic stroke and the underlying cellular and molecular mechanisms. The protective and reparative properties of Treg cells endorse them as good candidates for immune therapy. Strategies that boost the numbers and functions of Treg cells have been actively developing in the fields of transplantation and autoimmune diseases. We discuss the approaches for Treg cell expansion that have been tested in stroke models. The application of these approaches to stroke patients may bring new hope for stroke treatments.
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Affiliation(s)
- Miao Wang
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15261, USA
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, School of Medicine, University of Pittsburgh, 200 Lothrop Street, SBST, Pittsburgh, PA, 15213, USA
| | - Angus W Thomson
- Department of Surgery and Department of Immunology, Starzl Transplantation Institute, University of Pittsburgh School of Medicine, Pittsburgh, PA, 15213, USA
| | - Fang Yu
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, School of Medicine, University of Pittsburgh, 200 Lothrop Street, SBST, Pittsburgh, PA, 15213, USA
| | - Rimi Hazra
- Pittsburgh Heart, Lung, and Blood Vascular Medicine Institute, Department of Medicine, University of Pittsburgh, Pittsburgh, PA, 15213, USA
| | - Aditi Junagade
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, School of Medicine, University of Pittsburgh, 200 Lothrop Street, SBST, Pittsburgh, PA, 15213, USA
| | - Xiaoming Hu
- Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, 15261, USA.
- Pittsburgh Institute of Brain Disorders and Recovery and Department of Neurology, School of Medicine, University of Pittsburgh, 200 Lothrop Street, SBST, Pittsburgh, PA, 15213, USA.
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Egorova-Brumley N, Dhollander T, Khan W, Khlif MS, Ebaid D, Brodtmann A. Changes in White Matter Microstructure Over 3 Years in People With and Without Stroke. Neurology 2023; 100:e1664-e1672. [PMID: 36792378 PMCID: PMC10115498 DOI: 10.1212/wnl.0000000000207065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 01/03/2023] [Indexed: 02/17/2023] Open
Abstract
BACKGROUND AND OBJECTIVES Cerebral white matter health can be estimated by MRI-derived indices of microstructure. White matter dysfunction is increasingly recognized as a contributor to neurodegenerative disorders affecting cognition and to functional outcomes after stroke. Reduced indices of white matter microstructure have been demonstrated cross-sectionally in stroke survivors compared with stroke-free participants, but longitudinal changes in the structure of white matter after stroke remain largely unexplored. We aimed to characterize white matter micro- and macrostructure over 3 years after stroke and study associations with white matter metrics and cognitive functions. METHODS Patients with first-ever or recurrent ischemic stroke of any etiology in any vascular territory were compared with stroke-free age- and sex-matched controls. Those diagnosed with hemorrhagic stroke, TIA, venous infarction, or significant medical comorbidities, psychiatric and neurodegenerative disorders, substance abuse, or history of dementia were excluded. Diffusion-weighted MRI data at 3, 12, and 36 months were analyzed using a longitudinal fixel-based analysis, sensitive to fiber tract-specific differences within a voxel. It was used to examine whole-brain white matter degeneration in stroke compared with control participants. We studied microstructural differences in fiber density and macrostructural changes in fiber-bundle cross-section, in relation to cognitive performance. Analyses were performed controlling for age, intracranial volume, and education (family-wise error-corrected p < 0.05, nonparametric testing over 5,000 permutations). RESULTS We included 71 participants with stroke (age 66 ± 12 years, 22 women) and 36 controls (age 69 ± 5 years, 13 women). We observed extensive white matter structural degeneration across the whole brain, particularly affecting the thalamic, cerebellar, striatal, and superior longitudinal tracts and corpus callosum. Importantly, follow-up regression analyses in 72 predefined tracts showed that the decline in fiber density and cross-section from 3 months to 3 years was associated with worse cognitive performance at 3 years after stroke, especially affecting visuospatial processing, processing speed, language, and recognition memory. DISCUSSION We conclude that white matter neurodegeneration in ipsi- and contralesional thalamic, striatal, and cerebellar tracts continues to be greater in stroke survivors compared with stroke-free controls. White matter degeneration persists even years after stroke and is associated with poststroke cognitive impairment. TRIAL REGISTRATION INFORMATION ClinicalTrails.gov NCT02205424.
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Affiliation(s)
- Natalia Egorova-Brumley
- From the Melbourne School of Psychological Sciences (N.E.-B.), University of Melbourne; Dementia Theme (N.E.-B., W.K., M.S.K., D.E., A.B.), The Florey Institute of Neuroscience and Mental Health; Developmental Imaging (T.D.), Murdoch Children's Research Institute; and Cognitive Health Initiative (M.S.K., A.B.), Central Clinical School (CCS), Monash University, Melbourne, Australia.
| | - Thijs Dhollander
- From the Melbourne School of Psychological Sciences (N.E.-B.), University of Melbourne; Dementia Theme (N.E.-B., W.K., M.S.K., D.E., A.B.), The Florey Institute of Neuroscience and Mental Health; Developmental Imaging (T.D.), Murdoch Children's Research Institute; and Cognitive Health Initiative (M.S.K., A.B.), Central Clinical School (CCS), Monash University, Melbourne, Australia
| | - Wasim Khan
- From the Melbourne School of Psychological Sciences (N.E.-B.), University of Melbourne; Dementia Theme (N.E.-B., W.K., M.S.K., D.E., A.B.), The Florey Institute of Neuroscience and Mental Health; Developmental Imaging (T.D.), Murdoch Children's Research Institute; and Cognitive Health Initiative (M.S.K., A.B.), Central Clinical School (CCS), Monash University, Melbourne, Australia
| | - Mohamed Salah Khlif
- From the Melbourne School of Psychological Sciences (N.E.-B.), University of Melbourne; Dementia Theme (N.E.-B., W.K., M.S.K., D.E., A.B.), The Florey Institute of Neuroscience and Mental Health; Developmental Imaging (T.D.), Murdoch Children's Research Institute; and Cognitive Health Initiative (M.S.K., A.B.), Central Clinical School (CCS), Monash University, Melbourne, Australia
| | - Deena Ebaid
- From the Melbourne School of Psychological Sciences (N.E.-B.), University of Melbourne; Dementia Theme (N.E.-B., W.K., M.S.K., D.E., A.B.), The Florey Institute of Neuroscience and Mental Health; Developmental Imaging (T.D.), Murdoch Children's Research Institute; and Cognitive Health Initiative (M.S.K., A.B.), Central Clinical School (CCS), Monash University, Melbourne, Australia
| | - Amy Brodtmann
- From the Melbourne School of Psychological Sciences (N.E.-B.), University of Melbourne; Dementia Theme (N.E.-B., W.K., M.S.K., D.E., A.B.), The Florey Institute of Neuroscience and Mental Health; Developmental Imaging (T.D.), Murdoch Children's Research Institute; and Cognitive Health Initiative (M.S.K., A.B.), Central Clinical School (CCS), Monash University, Melbourne, Australia
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30
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Meng Y, Li CX, Zhang X. Quantitative Evaluation of Oxygen Extraction Fraction Changes in the Monkey Brain during Acute Stroke by Using Quantitative Susceptibility Mapping. Life (Basel) 2023; 13:1008. [PMID: 37109537 PMCID: PMC10146121 DOI: 10.3390/life13041008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 04/05/2023] [Accepted: 04/10/2023] [Indexed: 04/29/2023] Open
Abstract
BACKGROUND The oxygen extraction fraction (OEF) indicates the brain's oxygen consumption and can be estimated by using the quantitative susceptibility mapping (QSM) MRI technique. Recent studies have suggested that OEF alteration following stroke is associated with the viability of at-risk tissue. In the present study, the temporal evolution of OEF in the monkey brain during acute stroke was investigated using QSM. METHODS Ischemic stroke was induced in adult rhesus monkeys (n = 8) with permanent middle cerebral artery occlusion (pMCAO) by using an interventional approach. Diffusion-, T2-, and T2*-weighted images were conducted on day 0, day 2, and day 4 post-stroke using a clinical 3T scanner. Progressive changes in magnetic susceptibility and OEF, along with their correlations with the transverse relaxation rates and diffusion indices, were examined. RESULTS The magnetic susceptibility and OEF in injured gray matter of the brain significantly increased during the hyperacute phase, and then decreased significantly on day 2 and day 4. Moreover, the temporal changes of OEF in gray matter were moderately correlated with mean diffusivity (MD) (r = 0.52; p = 0.046) from day 0 to day 4. Magnetic susceptibility in white matter progressively increased (from negative values to near zero) during acute stroke, and significant increases were seen on day 2 (p = 0.08) and day 4 (p = 0.003) when white matter was significantly degenerated. However, significant reduction of OEF in white matter was not seen until day 4 post-stroke. CONCLUSION The preliminary results demonstrate that QSM-derived OEF is a robust approach to examine the progressive changes of gray matter in the ischemic brain from the hyperacute phase to the subacute phase of stroke. The changes of OEF in gray matter were more prominent than those in white matter following stroke insult. The findings suggest that QSM-derived OEF may provide complementary information for understanding the neuropathology of the brain tissue following stroke and predicting stroke outcomes.
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Affiliation(s)
- Yuguang Meng
- EPC Imaging Center, Emory National Primate Research Center, Emory University, Atlanta, GA 30329, USA
| | - Chun-Xia Li
- EPC Imaging Center, Emory National Primate Research Center, Emory University, Atlanta, GA 30329, USA
| | - Xiaodong Zhang
- EPC Imaging Center, Emory National Primate Research Center, Emory University, Atlanta, GA 30329, USA
- Division of Neuropharmacology and Neurologic Diseases, Emory National Primate Research Center, Emory University, Atlanta, GA 30329, USA
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31
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Zhao RY, Wei PJ, Sun X, Zhang DH, He QY, Liu J, Chang JL, Yang Y, Guo ZN. Role of lipocalin 2 in stroke. Neurobiol Dis 2023; 179:106044. [PMID: 36804285 DOI: 10.1016/j.nbd.2023.106044] [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: 05/12/2022] [Revised: 01/22/2023] [Accepted: 02/12/2023] [Indexed: 02/18/2023] Open
Abstract
Stroke is the second leading cause of death worldwide; however, the treatment choices available to neurologists are limited in clinical practice. Lipocalin 2 (LCN2) is a secreted protein, belonging to the lipocalin superfamily, with multiple biological functions in mediating innate immune response, inflammatory response, iron-homeostasis, cell migration and differentiation, energy metabolism, and other processes in the body. LCN2 is expressed at low levels in the brain under normal physiological conditions, but its expression is significantly up-regulated in multiple acute stimulations and chronic pathologies. An up-regulation of LCN2 has been found in the blood/cerebrospinal fluid of patients with ischemic/hemorrhagic stroke, and could serve as a potential biomarker for the prediction of the severity of acute stroke. LCN2 activates reactive astrocytes and microglia, promotes neutrophil infiltration, amplifies post-stroke inflammation, promotes blood-brain barrier disruption, white matter injury, and neuronal death. Moreover, LCN2 is involved in brain injury induced by thrombin and erythrocyte lysates, as well as microvascular thrombosis after hemorrhage. In this paper, we review the role of LCN2 in the pathological processes of ischemic stroke; intracerebral hemorrhage; subarachnoid hemorrhage; and stroke-related brain diseases, such as vascular dementia and post-stroke depression, and their underlying mechanisms. We hope that this review will help elucidate the value of LCN2 as a therapeutic target in stroke.
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Affiliation(s)
- Ruo-Yu Zhao
- Stroke Center, Department of Neurology, the First Hospital of Jilin University, Chang Chun, China
| | - Peng-Ju Wei
- Shenzhen Key Laboratory of Biomimetic Materials and Cellular Immunomodulation, Institute of Biomedicine and Biotechnology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Xin Sun
- Stroke Center, Department of Neurology, the First Hospital of Jilin University, Chang Chun, China
| | - Dian-Hui Zhang
- Stroke Center, Department of Neurology, the First Hospital of Jilin University, Chang Chun, China
| | - Qian-Yan He
- Stroke Center, Department of Neurology, the First Hospital of Jilin University, Chang Chun, China
| | - Jie Liu
- Stroke Center, Department of Neurology, the First Hospital of Jilin University, Chang Chun, China
| | - Jun-Lei Chang
- Shenzhen Key Laboratory of Biomimetic Materials and Cellular Immunomodulation, Institute of Biomedicine and Biotechnology, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yi Yang
- Stroke Center, Department of Neurology, the First Hospital of Jilin University, Chang Chun, China; Neuroscience Research Center, the First Hospital of Jilin University, Chang Chun, China; Jilin Provincial Key Laboratory of Cerebrovascular Disease, Changchun, China.
| | - Zhen-Ni Guo
- Stroke Center, Department of Neurology, the First Hospital of Jilin University, Chang Chun, China; Neuroscience Research Center, the First Hospital of Jilin University, Chang Chun, China; Jilin Provincial Key Laboratory of Cerebrovascular Disease, Changchun, China.
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Yuan C, Shi L, Sun Z, Xu F, Wang C, Shan J, Hitchens TK, Foley LM, Ye Q, Chen J, Sun D, Hu X. Regulatory T cell expansion promotes white matter repair after stroke. Neurobiol Dis 2023; 179:106063. [PMID: 36889482 DOI: 10.1016/j.nbd.2023.106063] [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: 11/14/2022] [Revised: 02/21/2023] [Accepted: 03/01/2023] [Indexed: 03/08/2023] Open
Abstract
Recent research highlights the function of regulatory T cells (Tregs) in white matter integrity in CNS diseases. Approaches that expand the number of Tregs have been utilized to improve stroke recovery. However, it remains unclear if Treg augmentation preserves white matter integrity early after stroke or promotes white matter repair. This study evaluates the effect of Treg augmentation on white matter injury and repair after stroke. Adult male C57/BL6 mice randomly received Treg or splenocyte (2 million, iv) transfer 2 h after transient (60 min) middle cerebral artery occlusion (tMCAO). Immunostaining showed improved white matter recovery after tMCAO in Treg-treated mice compared to mice received splenocytes. In another group of mice, IL-2/IL-2 antibody complexes (IL-2/IL-2Ab) or isotype IgG were administered (i.p) for 3 consecutive days starting 6 h after tMCAO, and repeated on day 10, 20 and 30. The IL-2/IL-2Ab treatment boosted the number of Tregs in blood and spleen and increased Treg infiltration into the ischemic brain. Longitudinal in vivo and ex vivo diffusion tensor imaging analysis revealed an increase in fractional anisotropy 28d and 35d, but not 14d, after stroke in IL-2/IL-2Ab-treated mice compared to isotype-treated mice, suggesting a delayed improvement in white matter integrity. IL-2/IL-2Ab also improved sensorimotor functions (rotarod test and adhesive removal test) 35d after stroke. There were correlations between white matter integrity and behavior performance. Immunostaining confirmed the beneficial effects of IL-2/IL-2Ab on white matter structures 35d after tMCAO. IL-2/IL-2Ab treatment starting as late as 5d after stroke still improved white matter integrity 21d after tMCAO, suggesting long-term salutary effects of Tregs on the late-stage tissue repair. We also found that IL-2/IL-2Ab treatment reduced the number of dead/dying OPCs and oligodendrocytes in the brain 3d after tMCAO. To confirm the direct effect of Tregs on remyelination, Tregs were cocultured with lysophosphatidyl choline (LPC)-treated organotypic cerebella. LPC exposure for 17 h induced demyelination in organotypic cultures, followed by gradual spontaneous remyelination upon removal of LPC. Co-culture with Tregs accelerated remyelination in organotypic cultures 7d after LPC. In conclusion, Boosting the number of Tregs protects oligodendrocyte lineage cells early after stroke and promotes long-term white matter repair and functional recovery. IL-2/IL-2Ab represents a feasible approach of Treg expansion for stroke treatment.
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Affiliation(s)
- Chunling Yuan
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Ligen Shi
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Zeyu Sun
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Fei Xu
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Chujun Wang
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - Jiajing Shan
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
| | - T Kevin Hitchens
- Animal Imaging Center, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15203, USA; Department of Neurobiology, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15203, USA
| | - Lesley M Foley
- Animal Imaging Center, School of Medicine, University of Pittsburgh, Pittsburgh, PA 15203, USA
| | - Qing Ye
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Jun Chen
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Dandan Sun
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA
| | - Xiaoming Hu
- Department of Neurology, University of Pittsburgh School of Medicine, Pittsburgh, PA, USA; Geriatric Research, Education and Clinical Center, Veterans Affairs Pittsburgh Health Care System, Pittsburgh, PA, USA.
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Eisenmenger LB, Peret A, Famakin BM, Spahic A, Roberts GS, Bockholt JH, Johnson KM, Paulsen JS. Vascular contributions to Alzheimer's disease. Transl Res 2023; 254:41-53. [PMID: 36529160 PMCID: PMC10481451 DOI: 10.1016/j.trsl.2022.12.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 12/05/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022]
Abstract
Alzheimer's disease (AD) is the most common cause of dementia and is characterized by progressive neurodegeneration and cognitive decline. Understanding the pathophysiology underlying AD is paramount for the management of individuals at risk of and suffering from AD. The vascular hypothesis stipulates a relationship between cardiovascular disease and AD-related changes although the nature of this relationship remains unknown. In this review, we discuss several potential pathological pathways of vascular involvement in AD that have been described including dysregulation of neurovascular coupling, disruption of the blood brain barrier, and reduced clearance of metabolite waste such as beta-amyloid, a toxic peptide considered the hallmark of AD. We will also discuss the two-hit hypothesis which proposes a 2-step positive feedback loop in which microvascular insults precede the accumulation of Aß and are thought to be at the origin of the disease development. At neuroimaging, signs of vascular dysfunction such as chronic cerebral hypoperfusion have been demonstrated, appearing early in AD, even before cognitive decline and alteration of traditional biomarkers. Cerebral small vessel disease such as cerebral amyloid angiopathy, characterized by the aggregation of Aß in the vessel wall, is highly prevalent in vascular dementia and AD patients. Current data is unclear whether cardiovascular disease causes, precipitates, amplifies, precedes, or simply coincides with AD. Targeted imaging tools to quantitatively evaluate the intracranial vasculature and longitudinal studies in individuals at risk for or in the early stages of the AD continuum could be critical in disentangling this complex relationship between vascular disease and AD.
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Affiliation(s)
- Laura B Eisenmenger
- Department of Radiology, University of Wisconsin-Madison, Madison, Wisconsin
| | - Anthony Peret
- Department of Radiology, University of Wisconsin-Madison, Madison, Wisconsin
| | - Bolanle M Famakin
- Department of Neurology, University of Wisconsin-Madison, Madison, Wisconsin
| | - Alma Spahic
- Department of Medical Physics, University of Wisconsin-Madison, Madison, Wisconsin
| | - Grant S Roberts
- Department of Medical Physics, University of Wisconsin-Madison, Madison, Wisconsin
| | - Jeremy H Bockholt
- Tri-Institutional Center for Translational Research in Neuroimaging and Data Science (TReNDS), Georgia State University, Georgia Institute of Technology, and Emory University, Atlanta, Georgia
| | - Kevin M Johnson
- Department of Medical Physics, University of Wisconsin-Madison, Madison, Wisconsin
| | - Jane S Paulsen
- Department of Neurology, University of Wisconsin-Madison, Madison, Wisconsin.
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Georgakopoulou T, van der Wijk AE, van Bavel E, Bakker ENTP. Perivascular clearance of blood proteins after blood-brain barrier disruption in a rat model of microinfarcts. Microvasc Res 2023; 148:104515. [PMID: 36893583 DOI: 10.1016/j.mvr.2023.104515] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 02/15/2023] [Accepted: 03/01/2023] [Indexed: 03/09/2023]
Abstract
Microinfarcts result in a transient loss of the blood-brain barrier (BBB) in the ischemic territory. This leads to the extravasation of blood proteins into the brain parenchyma. It is not clear how these proteins are removed. Here we studied the role of perivascular spaces in brain clearance from extravasated blood proteins. Male and female Wistar rats were infused with microspheres of either 15, 25, or 50 μm in diameter (n = 6 rats per group) via the left carotid artery. We infused either 25,000 microspheres of 15 μm, 5500 of 25 μm, or 1000 of 50 μm. One day later, rats were infused with lectin and hypoxyprobe to label perfused blood vessels and hypoxic areas, respectively. Rats were then euthanized and perfusion-fixed. Brains were excised, sectioned, and analyzed using immunostaining and confocal imaging. Microspheres induced a size-dependent increase in ischemic volume per territory, but the cumulative ischemic volume was similar in all groups. The total volumes of ischemia, hypoxia and infarction affected 1-2 % of the left hemisphere. Immunoglobulins (IgG) were present in ischemic brain tissue surrounding lodged microspheres in all groups. In addition, staining for IgG was found in perivascular spaces of blood vessels nearby areas of BBB disruption. About 2/3 of these vessels were arteries, while the remaining 1/3 of these vessels were veins. The subarachnoid space (SAS) of the affected hemisphere stained stronger for IgG than the contralateral hemisphere in all groups: +27 %, +44 % and +27 % respectively. Microspheres of various sizes induce a local loss of BBB integrity, evidenced by parenchymal IgG staining. The presence of IgG in perivascular spaces of both arteries and veins distinct from the ischemic territories suggests that both contribute to the removal of blood proteins. The strong staining for IgG in the SAS of the affected hemisphere suggests that this perivascular route egresses via the CSF. Perivascular spaces therefore play a previously unrecognized role in tissue clearance of fluid and extravasated proteins after BBB disruption induced by microinfarcts.
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Affiliation(s)
- Theodosia Georgakopoulou
- Amsterdam UMC Location University of Amsterdam, Biomedical Engineering and Physics, Meibergdreef 9, Amsterdam, the Netherlands
| | - Anne-Eva van der Wijk
- Amsterdam UMC Location University of Amsterdam, Biomedical Engineering and Physics, Meibergdreef 9, Amsterdam, the Netherlands; Amsterdam Cardiovascular Sciences, Microcirculation, Amsterdam, the Netherlands
| | - Ed van Bavel
- Amsterdam UMC Location University of Amsterdam, Biomedical Engineering and Physics, Meibergdreef 9, Amsterdam, the Netherlands; Amsterdam Cardiovascular Sciences, Microcirculation, Amsterdam, the Netherlands; Amsterdam Neuroscience, Neurovascular Disorders, Amsterdam, the Netherlands
| | - Erik N T P Bakker
- Amsterdam UMC Location University of Amsterdam, Biomedical Engineering and Physics, Meibergdreef 9, Amsterdam, the Netherlands; Amsterdam Cardiovascular Sciences, Microcirculation, Amsterdam, the Netherlands; Amsterdam Neuroscience, Neurovascular Disorders, Amsterdam, the Netherlands.
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Fang J, Song F, Chang C, Yao M. Intracerebral Hemorrhage Models and Behavioral Tests in Rodents. Neuroscience 2023; 513:1-13. [PMID: 36690062 DOI: 10.1016/j.neuroscience.2023.01.011] [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: 08/23/2022] [Revised: 01/08/2023] [Accepted: 01/13/2023] [Indexed: 01/22/2023]
Abstract
Intracerebral hemorrhage (ICH) is one of the common types of stroke, which can cause neurological dysfunction. In preclinical ICH studies, researchers often established rodent models by donor/autologous whole blood or a collagenase injection. White matter injury (WMI) can result from primary and secondary injuries after ICH. WMI can lead to short- and long-term neurological impairment, and functional recovery can assess the effect of drug therapy after ICH. Therefore, researchers have devised various behavioral tests to assess dysfunction. This review compares the two ICH modeling methods in rodents and summarizes the pathological mechanisms underlying dysfunction after ICH. We also summarize the functions and characteristics of various behavioral methods, including sensation, motion, emotion, and cognition, to assist researchers in selecting the appropriate tests for preclinical ICH research.
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Affiliation(s)
- Jie Fang
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen 518060, China
| | - Fanglai Song
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen 518060, China
| | - Chunqi Chang
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen 518060, China.
| | - Min Yao
- School of Pharmaceutical Sciences, Health Science Centre, Shenzhen University, Shenzhen 518060, China; Shenzhen SMQ Group Medical Laboratory, Shenzhen Academy of Measurement and Quality Inspection, Shenzhen 518060, China.
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Wang H, Liu Y, Guo Z, Cui M, Pang P, Yang J, Wu C. Enhancement of oligodendrocyte autophagy alleviates white matter injury and cognitive impairment induced by chronic cerebral hypoperfusion in rats. Acta Pharm Sin B 2023; 13:2107-2123. [DOI: 10.1016/j.apsb.2023.03.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 10/23/2022] [Accepted: 02/28/2023] [Indexed: 03/18/2023] Open
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Jia J, Zheng L, Ye L, Chen J, Shu S, Xu S, Bao X, Xia S, Liu R, Xu Y, Zhang M. CD11c + microglia promote white matter repair after ischemic stroke. Cell Death Dis 2023; 14:156. [PMID: 36828819 PMCID: PMC9958101 DOI: 10.1038/s41419-023-05689-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2022] [Revised: 02/14/2023] [Accepted: 02/15/2023] [Indexed: 02/26/2023]
Abstract
Ischemic stroke leads to white matter damage and neurological deficits. However, the characteristics of white matter injury and repair after stroke are unclear. Additionally, the precise molecular communications between microglia and white matter repair during the stroke rehabilitation phase remain elusive. In this current study, MRI DTI scan and immunofluorescence staining were performed to trace white matter and microglia in the mouse transient middle cerebral artery occlusion (tMCAO) stroke model. We found that the most serious white matter damage was on Day 7 after the ischemic stroke, then it recovered gradually from Day 7 to Day 30. Parallel to white matter recovery, we observed that microglia centered around the damaged myelin sheath and swallowed myelin debris in the ischemic areas. Then, microglia of the ischemic hemisphere were sorted by flow cytometry for RNA sequencing and subpopulation analysis. We found that CD11c+ microglia increased from Day 7 to Day 30, demonstrating high phagocytotic capabilities, myelin-supportive genes, and lipid metabolism associated genes. CD11c+ microglia population was partly depleted by the stereotactic injecting of rAAV2/6M-taCasp3 (rAAV2/6M-CMV-DIO-taCasp3-TEVp) into CD11c-cre mice. Selective depletion of CD11c+ microglia disrupted white matter repair, oligodendrocyte maturation, and functional recovery after stroke by Rotarod test, Adhesive Removal test, and Morris Water Maze test. These findings suggest that spontaneous white matter repair occurs after ischemic stroke, while CD11c+ microglia play critical roles in this white matter restorative progress.
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Affiliation(s)
- Junqiu Jia
- Department of Neurology, Drum Tower Hospital, The State Key Laboratory of Pharmaceutical Biotechnology, Institute of Brain Science, Medical School, Nanjing University, Nanjing, China
| | - Lili Zheng
- Department of Neurology, Drum Tower Hospital, The State Key Laboratory of Pharmaceutical Biotechnology, Institute of Brain Science, Medical School, Nanjing University, Nanjing, China
| | - Lei Ye
- Department of Neurology, Drum Tower Hospital, The State Key Laboratory of Pharmaceutical Biotechnology, Institute of Brain Science, Medical School, Nanjing University, Nanjing, China
| | - Jian Chen
- Department of Neurology, Drum Tower Hospital, The State Key Laboratory of Pharmaceutical Biotechnology, Institute of Brain Science, Medical School, Nanjing University, Nanjing, China
| | - Shu Shu
- Department of Neurology, Drum Tower Hospital, The State Key Laboratory of Pharmaceutical Biotechnology, Institute of Brain Science, Medical School, Nanjing University, Nanjing, China
| | - Siyi Xu
- Department of Neurology, Nanjing Drum Tower Hospital Clinical College of Jiangsu University, Zhenjiang, China
| | - Xinyu Bao
- Department of Neurology, Drum Tower Hospital, The State Key Laboratory of Pharmaceutical Biotechnology, Institute of Brain Science, Medical School, Nanjing University, Nanjing, China
| | - Shengnan Xia
- Department of Neurology, Drum Tower Hospital, The State Key Laboratory of Pharmaceutical Biotechnology, Institute of Brain Science, Medical School, Nanjing University, Nanjing, China
| | - Renyuan Liu
- Department of Radiology, Affiliated Nanjing Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Yun Xu
- Department of Neurology, Drum Tower Hospital, The State Key Laboratory of Pharmaceutical Biotechnology, Institute of Brain Science, Medical School, Nanjing University, Nanjing, China.
- Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, China.
- Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, China.
- Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, China.
| | - Meijuan Zhang
- Department of Neurology, Drum Tower Hospital, The State Key Laboratory of Pharmaceutical Biotechnology, Institute of Brain Science, Medical School, Nanjing University, Nanjing, China.
- Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, China.
- Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, China.
- Nanjing Neuropsychiatry Clinic Medical Center, Nanjing, China.
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Effects of HF-rTMS on microglial polarization and white matter integrity in rats with poststroke cognitive impairment. Behav Brain Res 2023; 439:114242. [PMID: 36455674 DOI: 10.1016/j.bbr.2022.114242] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2022] [Revised: 11/24/2022] [Accepted: 11/27/2022] [Indexed: 11/30/2022]
Abstract
Poststroke cognitive impairment (PSCI) occurs frequently after stroke, but effective treatments are lacking. Previous studies have revealed that high-frequency repetitive transcranial magnetic stimulation (HF-rTMS) has a beneficial effect on PSCI, but the mechanism is unclear. This study aimed to evaluate the effect of 10 and 20 Hz HF-rTMS on PSCI and the possible mechanisms. An ischemic stroke rat model was established by transient middle cerebral artery occlusion (tMCAO). The modified neurological deficit score (mNSS) and Morris water maze tests were conducted to assess neurological function and cognitive function. Luxol Fast Blue (LFB) staining was performed to evaluate white matter damage. Proinflammatory and anti-inflammatory cytokines were measured using enzyme-linked immunosorbent assays (ELISA). Immunofluorescence was used to assess microglial activation and polarization. Western blotting was performed to measure JAK2-STAT3 pathway-related protein expression. We found that HF-rTMS decreased the neurological deficit score. Compared with 10 Hz HF-rTMS, 20 Hz HF-rTMS more markedly improved the cognitive function of tMCAO rats at day 28 after operation. Furthermore, 20 Hz HF-rTMS attenuates white matter lesion, decreased proinflammatory cytokine levels, and increased anti-inflammatory cytokine levels. It also decreased the number of CD68- and CD16/32-positive microglia and increased the number of CD206-positive microglia. In addition, p-JAK2, JAK2, p-STAT3 and STAT3 expression was increased. These findings suggest that HF-rTMS improves cognitive function and attenuates white matter lesion in tMCAO rats by shifting microglia toward the M2 phenotype. Mechanisms may be related to regulation JAK2-STAT3 pathways.
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White Matter Injury: An Emerging Potential Target for Treatment after Subarachnoid Hemorrhage. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2023; 2023:3842493. [PMID: 36798684 PMCID: PMC9928519 DOI: 10.1155/2023/3842493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 12/20/2022] [Accepted: 01/04/2023] [Indexed: 02/10/2023]
Abstract
Subarachnoid hemorrhage (SAH) refers to vascular brain injury mainly from a ruptured aneurysm, which has a high lifetime risk and imposes a substantial burden on patients, families, and society. Previous studies on SAH mainly focused on neurons in gray matter (GM). However, according to literature reports in recent years, in-depth research on the mechanism of white matter (WM) is of great significance to injury and recovery after SAH. In terms of functional recovery after SAH, all kinds of cells in the central nervous system (CNS) should be protected. In other words, it is necessary to protect not only GM but also WM, not only neurons but also glial cells and axons, and not only for the lesion itself but also for the prevention and treatment of remote damage. Clarifying the mechanism of white matter injury (WMI) and repair after SAH is of great importance. Therefore, this present review systematically summarizes the current research on WMI after SAH, which might provide therapeutic targets for treatment after SAH.
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Migliolo L, de A. Boleti A, de O. Cardoso P, Frihling BF, e Silva P, de Moraes LRN. Adipose tissue, systematic inflammation, and neurodegenerative diseases. Neural Regen Res 2023; 18:38-46. [PMID: 35799506 PMCID: PMC9241402 DOI: 10.4103/1673-5374.343891] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
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Carmichael ST, Llorente IL. The Ties That Bind: Glial Transplantation in White Matter Ischemia and Vascular Dementia. Neurotherapeutics 2023; 20:39-47. [PMID: 36357662 PMCID: PMC10119342 DOI: 10.1007/s13311-022-01322-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/20/2022] [Indexed: 11/12/2022] Open
Abstract
White matter injury is a progressive vascular disease that leads to neurological deficits and vascular dementia. It comprises up to 30% of all diagnosed strokes, though up to ten times as many events go undiagnosed in early stages. There are several pathologies that can lead to white matter injury. While some studies suggest that white matter injury starts as small infarcts in deep penetrating blood vessels in the brain, others point to the breakdown of endothelial function or the blood-brain barrier as the primary cause of the disease. Whether due to local endothelial or BBB dysfunction, or to local small infarcts (or a combination), white matter injury progresses, accumulates, and expands from preexisting lesions into adjacent white matter to produce motor and cognitive deficits that present as vascular dementia in the elderly. Vascular dementia is the second leading cause of dementia, and white matter injury-attributed vascular dementia represents 40% of all diagnosed dementias and aggravates Alzheimer's pathology. Despite the advances in the last 15 years, there are few animal models of progressive subcortical white matter injury or vascular dementia. This review will discuss recent progress in animal modeling of white matter injury and the emerging principles to enhance glial function as a means of promoting repair and recovery.
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Affiliation(s)
- S Thomas Carmichael
- Department of Neurology, David Geffen School of Medicine at UCLA, 635 Charles E Young Drive South, NRB 407, Los Angeles, CA, 90095, USA
| | - Irene L Llorente
- Department of Neurosurgery, Stanford University, 3801 Miranda Ave, 94304, Palo alto, USA.
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Gerbasi A, Konduri P, Tolhuisen M, Cavalcante F, Rinkel L, Kappelhof M, Wolff L, Coutinho JM, Emmer BJ, Costalat V, Arquizan C, Hofmeijer J, Uyttenboogaart M, van Zwam W, Roos Y, Quaglini S, Bellazzi R, Majoie C, Marquering H. Prognostic Value of Combined Radiomic Features from Follow-Up DWI and T2-FLAIR in Acute Ischemic Stroke. J Cardiovasc Dev Dis 2022; 9:jcdd9120468. [PMID: 36547465 PMCID: PMC9786822 DOI: 10.3390/jcdd9120468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 12/13/2022] [Accepted: 12/15/2022] [Indexed: 12/24/2022] Open
Abstract
The biological pathways involved in lesion formation after an acute ischemic stroke (AIS) are poorly understood. Despite successful reperfusion treatment, up to two thirds of patients with large vessel occlusion remain functionally dependent. Imaging characteristics extracted from DWI and T2-FLAIR follow-up MR sequences could aid in providing a better understanding of the lesion constituents. We built a fully automated pipeline based on a tree ensemble machine learning model to predict poor long-term functional outcome in patients from the MR CLEAN-NO IV trial. Several feature sets were compared, considering only imaging, only clinical, or both types of features. Nested cross-validation with grid search and a feature selection procedure based on SHapley Additive exPlanations (SHAP) was used to train and validate the models. Considering features from both imaging modalities in combination with clinical characteristics led to the best prognostic model (AUC = 0.85, 95%CI [0.81, 0.89]). Moreover, SHAP values showed that imaging features from both sequences have a relevant impact on the final classification, with texture heterogeneity being the most predictive imaging biomarker. This study suggests the prognostic value of both DWI and T2-FLAIR follow-up sequences for AIS patients. If combined with clinical characteristics, they could lead to better understanding of lesion pathophysiology and improved long-term functional outcome prediction.
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Affiliation(s)
- Alessia Gerbasi
- Department of Electrical, Computer and Biomedical Engineering, University of Pavia, 27100 PV Pavia, Italy
- Correspondence:
| | - Praneeta Konduri
- Department of Biomedical Engineering and Physics, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Manon Tolhuisen
- Department of Biomedical Engineering and Physics, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Fabiano Cavalcante
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Leon Rinkel
- Department of Neurology, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Manon Kappelhof
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Lennard Wolff
- Department of Radiology and Nuclear Medicine, Erasmus MC University Medical Center, 3015 Rotterdam, The Netherlands
| | - Jonathan M. Coutinho
- Department of Neurology, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Bart J. Emmer
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Vincent Costalat
- Department of Neuroradiology, Centre Hospitalier Universitaire de Montpellier, 34400 Montpellier, France
| | - Caroline Arquizan
- Department of Neurology, Centre Hospitalier Universitaire de Montpellier, 34400 Montpellier, France
| | - Jeannette Hofmeijer
- Department of Neurology, Rijnstate Hospital, 6836 BH Arnhem, The Netherlands
| | - Maarten Uyttenboogaart
- Department of Neurology and Department of Medical Imaging Center, University Medical Center Groningen, 9713 GZ Groningen, The Netherlands
| | - Wim van Zwam
- Department of Radiology and Nuclear Medicine, Maastricht University Medical Center, 6229 HX Maastricht, The Netherlands
| | - Yvo Roos
- Department of Neurology, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Silvana Quaglini
- Department of Electrical, Computer and Biomedical Engineering, University of Pavia, 27100 PV Pavia, Italy
| | - Riccardo Bellazzi
- Department of Electrical, Computer and Biomedical Engineering, University of Pavia, 27100 PV Pavia, Italy
| | - Charles Majoie
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
| | - Henk Marquering
- Department of Biomedical Engineering and Physics, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
- Department of Radiology and Nuclear Medicine, Amsterdam UMC Location University of Amsterdam, 1105 AZ Amsterdam, The Netherlands
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Lin YH, Chen CH, Tang SC, Lee CW, Yeh SJ, Tsai LK, Jeng JS. Posterior Limb of Internal Capsule Infarct Predicts Functional Outcome in Acute Terminal Internal Carotid Artery Occlusion After Thrombectomy. Clin Neuroradiol 2022; 32:951-959. [PMID: 35238949 DOI: 10.1007/s00062-022-01148-z] [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] [Received: 11/01/2021] [Accepted: 01/31/2022] [Indexed: 12/15/2022]
Abstract
PURPOSES This study investigated the impact of posterior limb of internal capsule (PLIC) infarct on outcomes of acute internal carotid artery (ICA) occlusion after endovascular thrombectomy (EVT) and the diagnostic accuracy of pretreatment noncontrast computerized tomography (NCCT) and computerized tomography angiography (CTA) findings. METHODS Patients who underwent EVT for acute ICA occlusion between September 2014 and August 2020 were included in the study. The patients were dichotomized as PLIC infarct or spared. The risk factors for PLIC infarct were investigated, and the association between infarct patterns and clinical outcomes were assessed using logistic regression analysis. Pretreatment NCCT and CTA findings, including PLIC hypodensity, choroid plexus enhancement (CPE), and posterior cerebral artery (PCA) flow status, were calculated for diagnosis of PLIC infarct. RESULTS Among 72 patients, the mean age was 70.9 years, and the mean stroke scale was 19.4. PLIC infarct was identified in 15 patients (20.8%). PLIC infarct was associated with worse 90-day functional outcome (P = 0.01, shift test). Lack of CPE is the only independent predictor of PLIC infarct (odds ratio: 127.48, P = 0.001). Lack of CPE and impaired PCA flow produce greater diagnostic accuracy for PLIC infarct than does NCCT hypodensity (area under the receiver operating characteristics curve: 0.85 and 0.76, P = 0.0005 and 0.02, respectively). CONCLUSIONS In acute ICA occlusion, PLIC infarct is an independent risk factor for worse clinical outcome at 90 days. The lack of CPE was associated with PLIC infarct, and pretreatment CTA can be useful for early diagnosis.
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Affiliation(s)
- Yen-Heng Lin
- Department of Medical Imaging, National Taiwan University Hospital, No. 7, Chung-Shan South Road, 10055, Taipei, Taiwan
| | - Chih-Hao Chen
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
| | - Sung-Chun Tang
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chung-Wei Lee
- Department of Medical Imaging, National Taiwan University Hospital, No. 7, Chung-Shan South Road, 10055, Taipei, Taiwan.
| | - Shin-Joe Yeh
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
| | - Li-Kai Tsai
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
| | - Jiann-Shing Jeng
- Stroke Center and Department of Neurology, National Taiwan University Hospital, Taipei, Taiwan
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Zhao Y, Zhu W, Wan T, Zhang X, Li Y, Huang Z, Xu P, Huang K, Ye R, Xie Y, Liu X. Vascular endothelium deploys caveolin-1 to regulate oligodendrogenesis after chronic cerebral ischemia in mice. Nat Commun 2022; 13:6813. [PMID: 36357389 PMCID: PMC9649811 DOI: 10.1038/s41467-022-34293-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Accepted: 10/18/2022] [Indexed: 11/12/2022] Open
Abstract
Oligovascular coupling contributes to white matter vascular homeostasis. However, little is known about the effects of oligovascular interaction on oligodendrocyte precursor cell (OPC) changes in chronic cerebral ischemia. Here, using a mouse of bilateral carotid artery stenosis, we show a gradual accumulation of OPCs on vasculature with impaired oligodendrogenesis. Mechanistically, chronic ischemia induces a substantial loss of endothelial caveolin-1 (Cav-1), leading to vascular secretion of heat shock protein 90α (HSP90α). Endothelial-specific over-expression of Cav-1 or genetic knockdown of vascular HSP90α restores normal vascular-OPC interaction, promotes oligodendrogenesis and attenuates ischemic myelin damage. miR-3074(-1)-3p is identified as a direct inducer of Cav-1 reduction in mice and humans. Endothelial uptake of nanoparticle-antagomir improves myelin damage and cognitive deficits dependent on Cav-1. In summary, our findings demonstrate that vascular abnormality may compromise oligodendrogenesis and myelin regeneration through endothelial Cav-1, which may provide an intercellular mechanism in ischemic demyelination.
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Affiliation(s)
- Ying Zhao
- grid.41156.370000 0001 2314 964XDepartment of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210000 China
| | - Wusheng Zhu
- grid.41156.370000 0001 2314 964XDepartment of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210000 China
| | - Ting Wan
- grid.233520.50000 0004 1761 4404Department of Neurology, Xijing Hospital, Air Force Medical University, Xi’an, Shanxi 710032 China
| | - Xiaohao Zhang
- grid.89957.3a0000 0000 9255 8984Department of Neurology, Nanjing First Hospital, Nanjing Medical University, Nanjing, Jiangsu 210000 China
| | - Yunzi Li
- grid.41156.370000 0001 2314 964XDepartment of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210000 China
| | - Zhenqian Huang
- grid.41156.370000 0001 2314 964XDepartment of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210000 China
| | - Pengfei Xu
- grid.59053.3a0000000121679639Stroke Center & Department of Neurology, The Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230036 Anhui China
| | - Kangmo Huang
- grid.41156.370000 0001 2314 964XDepartment of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210000 China
| | - Ruidong Ye
- grid.41156.370000 0001 2314 964XDepartment of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210000 China
| | - Yi Xie
- grid.41156.370000 0001 2314 964XDepartment of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210000 China
| | - Xinfeng Liu
- grid.41156.370000 0001 2314 964XDepartment of Neurology, Affiliated Jinling Hospital, Medical School of Nanjing University, Nanjing, Jiangsu 210000 China ,grid.59053.3a0000000121679639Stroke Center & Department of Neurology, The Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, 230036 Anhui China
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Liu L, Liu J, Li M, Lyu J, Su W, Feng S, Ji X. Selective brain hypothermia attenuates focal cerebral ischemic injury and improves long-term neurological outcome in aged female mice. CNS Neurosci Ther 2022; 29:129-139. [PMID: 36341958 PMCID: PMC9804044 DOI: 10.1111/cns.14017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2022] [Revised: 10/09/2022] [Accepted: 10/20/2022] [Indexed: 11/09/2022] Open
Abstract
AIMS This study aimed to investigate the effects of mild selective brain hypothermia on aged female ischemic mice. METHODS A distal middle cerebral artery occlusion (dMCAO) model was established in aged female mice, who were then subjected to mild selective brain hypothermia immediately after the dMCAO procedure. Neurological behavioral examinations were conducted prior to and up to 35 days post-ischemia. Infarct volume, brain atrophy, pro-inflammation, and anti-inflammation microglia/macrophages phenotype and white matter injury were evaluated by immunofluorescence staining. Correlations between neurological behaviors and histological parameters were evaluated by Pearson product linear regression analysis. RESULTS Sensorimotor and cognitive function tests confirmed the protective effect of mild selective brain hypothermia in elderly female ischemic mice. In addition, hypothermia decreased the infarct volume and brain atrophy induced by focal cerebral ischemia. Furthermore, hypothermia alleviated ischemia-induced short-term and long-term white matter injury, which was correlated with behavioral deficits. Finally, hypothermia suppressed the harmful immunological response by promoting the transformation of pro-inflammatory microglia/macrophages to anti-inflammatory phenotype. This polarization was negatively correlated with neuronal loss and white matter injury. CONCLUSION Mild selective brain hypothermia promoted long-term functional recovery by alleviating white matter damage in an aged female mouse model of ischemia.
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Affiliation(s)
- Liqiang Liu
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain DisordersCapital Medical UniversityBeijingChina
| | - Jia Liu
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain DisordersCapital Medical UniversityBeijingChina
| | - Ming Li
- Beijing Institute of Geriatrics, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Junxuan Lyu
- Department of Neurology, Xuanwu HospitalCapital Medical UniversityBeijingChina
| | - Wei Su
- Department of Neurosurgery, Beijing Tsing Hua Chang Gung Hospital, School of Clinical MedicineTsing Hua UniversityBeijingChina
| | - Shejun Feng
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain DisordersCapital Medical UniversityBeijingChina
| | - Xunming Ji
- Beijing Institute of Brain Disorders, Laboratory of Brain Disorders, Ministry of Science and Technology, Collaborative Innovation Center for Brain DisordersCapital Medical UniversityBeijingChina,Department of Neurosurgery, Xuanwu HospitalCapital Medical UniversityBeijingChina
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A retrospective study of perioperative clinical seizures and epilepsy in children after operation for CHD. Cardiol Young 2022; 32:1807-1813. [PMID: 34961572 DOI: 10.1017/s1047951121005011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
This study investigated the incidence and risk factors of perioperative clinical seizure and epilepsy in children after operation for CHD. We included 777 consecutive children who underwent operation from January 2013 to December 2016 at Kanagawa Children's Medical Center, Kanagawa, Japan. Perinatal, perioperative, and follow-up medical data were collected. Elastic net regression and mediation analysis were performed to investigate risk factors of perioperative clinical seizure and epilepsy. Anatomic CHD classification was performed based on the preoperative echocardiograms; cardiac surgery was evaluated using Risk Adjustment in Congenital Heart Surgery 1. Twenty-three (3.0%) and 15 (1.9%) patients experienced perioperative clinical seizure and epilepsy, respectively. Partial regression coefficient with epilepsy as the objective variable for anatomical CHD classification, Risk Adjustment in Congenital Heart Surgery 1, and the number of surgeries was 0.367, 0.014, and 0.142, respectively. The proportion of indirect effects on epilepsy via perioperative clinical seizure was 22.0, 21.0, and 33.0%, respectively. The 15 patients with epilepsy included eight cases with cerebral infarction, two cases with cerebral haemorrhage, and three cases with hypoxic-ischaemic encephalopathy; white matter integrity was not found. Anatomical complexity of CHD, high-risk cardiac surgery, and multiple cardiac surgeries were identified as potential risk factors for developing epilepsy, with a low rate of indirect involvement via perioperative clinical seizure and a high rate of direct involvement independently of perioperative clinical seizure. Unlike white matter integrity, stroke and hypoxic-ischaemic encephalopathy were identified as potential factors for developing epilepsy.
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Nadkarni NA, Arias E, Fang R, Haynes ME, Zhang HF, Muller WA, Batra A, Sullivan DP. Platelet Endothelial Cell Adhesion Molecule (PECAM/CD31) Blockade Modulates Neutrophil Recruitment Patterns and Reduces Infarct Size in Experimental Ischemic Stroke. THE AMERICAN JOURNAL OF PATHOLOGY 2022; 192:1619-1632. [PMID: 35952762 PMCID: PMC9667712 DOI: 10.1016/j.ajpath.2022.07.008] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Revised: 07/05/2022] [Accepted: 07/14/2022] [Indexed: 12/15/2022]
Abstract
The infiltration of polymorphonuclear leukocytes (PMNs) in ischemia-reperfusion injury (I/RI) has been implicated as a critical component of inflammatory damage following ischemic stroke. However, successful blockade of PMN transendothelial migration (TEM) in preclinical studies has not translated to meaningful clinical outcomes. To investigate this further, leukocyte infiltration patterns were quantified, and these patterns were modulated by blocking platelet endothelial cell adhesion molecule-1 (PECAM), a key regulator of TEM. LysM-eGFP mice and microscopy were used to visualize all myeloid leukocyte recruitment following ischemia/reperfusion. Visual examination showed heterogeneous leukocyte distribution across the infarct at both 24 and 72 hours after I/RI. A semiautomated process was designed to precisely map PMN position across brain sections. Treatment with PECAM function-blocking antibodies did not significantly affect total leukocyte recruitment but did alter their distribution, with more observed at the cortex at both early and later time points (24 hours: 89% PECAM blocked vs. 72% control; 72 hours: 69% PECAM blocked vs. 51% control). This correlated with a decrease in infarct volume. These findings suggest that TEM, in the setting of I/RI in the cerebrovasculature, occurs primarily at the cortical surface. The reduction of stroke size with PECAM blockade suggests that infiltrating PMNs may exacerbate I/RI and indicate the potential therapeutic benefit of regulating the timing and pattern of leukocyte infiltration after stroke.
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Affiliation(s)
- Neil A Nadkarni
- Department of Neurology, Northwestern University, Chicago, Illinois
| | - Erika Arias
- Department of Pathology, Northwestern University, Chicago, Illinois
| | - Raymond Fang
- Department of Biomedical Engineering, Northwestern University, Chicago, Illinois
| | - Maureen E Haynes
- Department of Pathology, Northwestern University, Chicago, Illinois
| | - Hao F Zhang
- Department of Biomedical Engineering, Northwestern University, Chicago, Illinois
| | - William A Muller
- Department of Pathology, Northwestern University, Chicago, Illinois
| | - Ayush Batra
- Department of Neurology, Northwestern University, Chicago, Illinois; Department of Pathology, Northwestern University, Chicago, Illinois
| | - David P Sullivan
- Department of Pathology, Northwestern University, Chicago, Illinois.
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Cao XW, Yang H, Liu XM, Lou SY, Kong LP, Rong LQ, Shan JJ, Xu Y, Zhang QX. Blocking postsynaptic density-93 binding to C-X3-C motif chemokine ligand 1 promotes microglial phenotypic transformation during acute ischemic stroke. Neural Regen Res 2022; 18:1033-1039. [PMID: 36254989 PMCID: PMC9827769 DOI: 10.4103/1673-5374.355759] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We previously reported that postsynaptic density-93 mediates neuron-microglia crosstalk by interacting with amino acids 357-395 of C X3 C motif chemokine ligand 1 (CX3CL1) to induce microglia polarization. More importantly, the peptide Tat-CX3CL1 (comprising amino acids 357-395 of CX3CL1) disrupts the interaction between postsynaptic density-93 and CX3CL1, reducing neurological impairment and exerting a protective effect in the context of acute ischemic stroke. However, the mechanism underlying these effects remains unclear. In the current study, we found that the pro-inflammatory M1 phenotype increased and the anti-inflammatory M2 phenotype decreased at different time points. The M1 phenotype increased at 6 hours after stroke and peaked at 24 hours after perfusion, whereas the M2 phenotype decreased at 6 and 24 hours following reperfusion. We found that the peptide Tat-CX3CL1 (357-395aa) facilitates microglial polarization from M1 to M2 by reducing the production of soluble CX3CL1. Furthermore, the a disintegrin and metalloprotease domain 17 (ADAM17) inhibitor GW280264x, which inhibits metalloprotease activity and prevents CX3CL1 from being sheared into its soluble form, facilitated microglial polarization from M1 to M2 by inhibiting soluble CX3CL1 formation. Additionally, Tat-CX3CL1 (357-395aa) attenuated long-term cognitive deficits and improved white matter integrity as determined by the Morris water maze test at 31-34 days following surgery and immunofluorescence staining at 35 days after stroke, respectively. In conclusion, Tat-CX3CL1 (357-395aa) facilitates functional recovery after ischemic stroke by promoting microglial polarization from M1 to M2. Therefore, the Tat-CX3CL1 (357-395aa) is a potential therapeutic agent for ischemic stroke.
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Affiliation(s)
- Xiao-Wei Cao
- Department of Neurology of Drum Tower Hospital, Medical School and the State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu Province, China,Nanjing Drum Tower Clinical College of Xuzhou Medical University, Nanjing, Jiangsu Province, China,Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu Province, China,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu Province, China,Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu Province, China,Nanjing Neurology Clinic Medical Center, Nanjing, Jiangsu Province, China,Department of Neurology, Lianyungang Municipal Hospital, Affiliated Hospital of Xuzhou Medical University, Lianyungang, Jiangsu Province, China
| | - Hui Yang
- Department of Neurosurgery of Drum Tower Hospital, Medical School and the State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu Province, China,Department of Neurosurgery, Affiliated Xuzhou Municipal Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Xiao-Mei Liu
- Jiangsu Key Laboratory of Immunity and Metabolism, Department of Pathogen Biology and Immunology and Laboratory of Infection and Immunity, Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Shi-Ying Lou
- Department of Neurology of Drum Tower Hospital, Medical School and the State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu Province, China,Nanjing Drum Tower Clinical College of Xuzhou Medical University, Nanjing, Jiangsu Province, China,Department of Neurology, Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Li-Ping Kong
- Department of Neurology, Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Liang-Qun Rong
- Department of Neurology, Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Jun-Jun Shan
- Department of Neurology, Second Affiliated Hospital of Xuzhou Medical University, Xuzhou, Jiangsu Province, China
| | - Yun Xu
- Department of Neurology of Drum Tower Hospital, Medical School and the State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu Province, China,Nanjing Drum Tower Clinical College of Xuzhou Medical University, Nanjing, Jiangsu Province, China,Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu Province, China,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu Province, China,Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu Province, China,Nanjing Neurology Clinic Medical Center, Nanjing, Jiangsu Province, China
| | - Qing-Xiu Zhang
- Department of Neurology of Drum Tower Hospital, Medical School and the State Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing, Jiangsu Province, China,Nanjing Drum Tower Clinical College of Xuzhou Medical University, Nanjing, Jiangsu Province, China,Institute of Brain Sciences, Nanjing University, Nanjing, Jiangsu Province, China,Jiangsu Key Laboratory for Molecular Medicine, Medical School of Nanjing University, Nanjing, Jiangsu Province, China,Jiangsu Province Stroke Center for Diagnosis and Therapy, Nanjing, Jiangsu Province, China,Nanjing Neurology Clinic Medical Center, Nanjing, Jiangsu Province, China,Correspondence to: Qing-Xiu Zhang, .
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49
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Dietz RM, Dingman AL, Herson PS. Cerebral ischemia in the developing brain. J Cereb Blood Flow Metab 2022; 42:1777-1796. [PMID: 35765984 PMCID: PMC9536116 DOI: 10.1177/0271678x221111600] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2021] [Revised: 04/29/2022] [Accepted: 05/27/2022] [Indexed: 11/16/2022]
Abstract
Brain ischemia affects all ages, from neonates to the elderly population, and is a leading cause of mortality and morbidity. Multiple preclinical rodent models involving different ages have been developed to investigate the effect of ischemia during different times of key brain maturation events. Traditional models of developmental brain ischemia have focused on rodents at postnatal day 7-10, though emerging models in juvenile rodents (postnatal days 17-25) indicate that there may be fundamental differences in neuronal injury and functional outcomes following focal or global cerebral ischemia at different developmental ages, as well as in adults. Here, we consider the timing of injury in terms of excitation/inhibition balance, oxidative stress, inflammatory responses, blood brain barrier integrity, and white matter injury. Finally, we review translational strategies to improve function after ischemic brain injury, including new ideas regarding neurorestoration, or neural repair strategies that restore plasticity, at delayed time points after ischemia.
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Affiliation(s)
- Robert M Dietz
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
- Department of Anesthesiology, University of Colorado School of Medicine, Aurora, CO, USA
- Neuronal Injury Program, University of Colorado School of Medicine, Aurora, CO, USA
| | - Andra L Dingman
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, CO, USA
- Neuronal Injury Program, University of Colorado School of Medicine, Aurora, CO, USA
| | - Paco S Herson
- Department of Neurological Surgery, The Ohio State University College of Medicine, Columbus, OH, USA
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Role of NAD + and FAD in Ischemic Stroke Pathophysiology: An Epigenetic Nexus and Expanding Therapeutic Repertoire. Cell Mol Neurobiol 2022:10.1007/s10571-022-01287-4. [PMID: 36180651 DOI: 10.1007/s10571-022-01287-4] [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: 04/03/2022] [Accepted: 09/15/2022] [Indexed: 11/03/2022]
Abstract
The redox coenzymes viz., oxidized β-nicotinamide adenine dinucleotide (NAD+) and flavin adenine dinucleotide (FAD) by way of generation of optimal reducing power and cellular energy currency (ATP), control a staggering array of metabolic reactions. The prominent cellular contenders for NAD+ utilization, inter alia, are sirtuins (SIRTs) and poly(ADP-ribose) polymerase (PARP-1), which have been significantly implicated in ischemic stroke (IS) pathogenesis. NAD+ and FAD are also two crucial epigenetic enzyme-required metabolites mediating histone deacetylation and poly(ADP-ribosyl)ation through SIRTs and PARP-1 respectively, and demethylation through FAD-mediated lysine specific demethylase activity. These enzymes and post-translational modifications impinge on the components of neurovascular unit, primarily neurons, and elicit diverse functional upshots in an ischemic brain. These could be circumstantially linked with attendant cognitive deficits and behavioral outcomes in post-stroke epoch. Parsing out the contribution of NAD+/FAD-synthesizing and utilizing enzymes towards epigenetic remodeling in IS setting, together with their cognitive and behavioral associations, combined with possible therapeutic implications will form the crux of this review.
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