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Bahire KL, Maļuhins R, Bello F, Upīte J, Makarovs A, Jansone B. Long-Term Region-Specific Mitochondrial Functionality Changes in Both Cerebral Hemispheres after fMCAo Model of Ischemic Stroke. Antioxidants (Basel) 2024; 13:416. [PMID: 38671864 PMCID: PMC11047464 DOI: 10.3390/antiox13040416] [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: 02/29/2024] [Revised: 03/24/2024] [Accepted: 03/27/2024] [Indexed: 04/28/2024] Open
Abstract
Cerebral ischemia/reperfusion (I/R) refers to a secondary brain injury that results in mitochondrial dysfunction of variable extent, leading to neuronal cell damage. The impact of this process has mainly been studied in the short term, from the early hours up to one week after blood flow reperfusion, and in the ischemic hemisphere only. The focus of this study was to assess the long-term impacts of I/R on mitochondrial functionality using high-resolution fluorespirometry to evaluate state-dependent activities in both ischemic (ipsilateral) and non-ischemic (contralateral) hemispheres of male mice 60, 90, 120, and 180 days after I/R caused by 60-min-long filament-induced middle cerebral artery occlusion (fMCAo). Our results indicate that in cortical tissues, succinate-supported oxygen flux (Complex I&II OXPHOS state) and H2O2 production (Complex II LEAK state) were significantly decreased in the fMCAo (stroke) group ipsilateral hemisphere compared to measurements in the contralateral hemisphere 60 and 90 days after stroke. In hippocampal tissues, during the Complex I&II ET state, mitochondrial respiration was generally lower in the ipsilateral compared to the contralateral hemisphere 90 days following stroke. An aging-dependent impact on mitochondria oxygen consumption following I/R injury was observed 180 days after surgery, wherein Complex I&II activities were lowest in both hemispheres. The obtained results highlight the importance of long-term studies in the field of ischemic stroke, particularly when evaluating mitochondrial bioenergetics in specific brain regions within and between separately affected cerebral hemispheres.
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Affiliation(s)
- Ksenija Lūcija Bahire
- Department of Pharmacology, Faculty of Medicine, University of Latvia, LV-1586 Riga, Latvia; (R.M.); (F.B.); (J.U.); (A.M.)
| | | | | | | | | | - Baiba Jansone
- Department of Pharmacology, Faculty of Medicine, University of Latvia, LV-1586 Riga, Latvia; (R.M.); (F.B.); (J.U.); (A.M.)
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Jiang Z, Wei J, Liang J, Huang W, Ouyang F, Chen C, Li P, Cao S, Cai Y, Li J, Huang B, Zeng J, Chen Y. Dl-3-n-Butylphthalide Alleviates Secondary Brain Damage and Improves Working Memory After Stroke in Cynomolgus Monkeys. Stroke 2024; 55:725-734. [PMID: 38406851 DOI: 10.1161/strokeaha.123.045037] [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: 08/30/2023] [Accepted: 01/17/2024] [Indexed: 02/27/2024]
Abstract
BACKGROUND Remote secondary neurodegeneration is associated with poststroke cognitive impairment (PSCI). Dl-3-n-butylphthalide (NBP) improves PSCI clinically. However, whether it ameliorates PSCI by alleviating secondary neurodegeneration remains uncertain. Nonhuman primates provide more relevant models than rodents for human stroke and PSCI. This study investigated the effects of NBP on PSCI and secondary neurodegeneration in cynomolgus monkeys after permanent left middle cerebral artery occlusion (MCAO). METHODS Thirteen adult male cynomolgus monkeys were randomly assigned to sham (n=4), MCAO+placebo (n=5), and MCAO+NBP groups (n=4). The MCAO+placebo and MCAO+NBP groups received saline and NBP injections intravenously, respectively, starting at 6-hour postsurgery for 2 weeks, followed by soybean oil and NBP orally, respectively, for 10 weeks after MCAO. Infarct size was assessed at week 4 by magnetic resonance imaging. Working memory and executive function were evaluated dynamically using the delayed response task and object retrieval detour task, respectively. Neuron loss, glia proliferation, and neuroinflammation in the ipsilateral dorsal lateral prefrontal cortex, thalamus, and hippocampus were analyzed by immunostaining 12 weeks after MCAO. RESULTS Infarcts were located in the left middle cerebral artery region, apart from the ipsilateral dorsal lateral prefrontal cortex, thalamus, or hippocampus, with no significant difference between the MCAO+placebo and MCAO+NBP group. Higher success in delayed response task was achieved at weeks 4, 8, and 12 after NBP compared with placebo treatments (P<0.05), but not in the object retrieval detour task (all P>0.05). More neurons and less microglia, astrocytes, CD68-positive microglia, tumor necrosis factor-α, and inducible NO synthase were observed in the ipsilateral dorsal lateral prefrontal cortex and thalamus after 12 weeks of NBP treatment (P<0.05), but not in the hippocampus (P>0.05). CONCLUSIONS Our findings indicate that NBP improves working memory by alleviating remote secondary neurodegeneration and neuroinflammation in the ipsilateral dorsal lateral prefrontal cortex and thalamus after MCAO in cynomolgus monkeys.
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Affiliation(s)
- Zimu Jiang
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
| | - Jiating Wei
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
| | - Jiahui Liang
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
| | - Weixian Huang
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
| | - Fubing Ouyang
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
| | - Chunyong Chen
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- Department of Neurology, The First Affiliated Hospital, Guangxi Medical University; Nanning, China (C.C., P.L., B.H.)
| | - Pingping Li
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- Department of Neurology, The First Affiliated Hospital, Guangxi Medical University; Nanning, China (C.C., P.L., B.H.)
| | - Suhan Cao
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
| | - Yuangui Cai
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
| | - Jianle Li
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
| | - Baozi Huang
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- Department of Neurology, The First Affiliated Hospital, Guangxi Medical University; Nanning, China (C.C., P.L., B.H.)
| | - Jinsheng Zeng
- Department of Neurology (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z.), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
| | - Yicong Chen
- Section II, Department of Neurology and Stroke Center (Y. Chen), The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Diagnosis and Treatment of Major Neurological Diseases, Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
- National Key Clinical Department, Key Discipline of Neurology; Guangzhou, China (Z.J., J.W., J. Liang, W.H., F.O., C.C., P.L., S.C., Y. Cai, J. Li, B.H., J.Z., Y. Chen)
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Jia W, Zhou Y, Zuo L, Liu T, Li Z. Effects of brain atrophy and altered functional connectivity on poststroke cognitive impairment. Brain Res 2024; 1822:148635. [PMID: 37852525 DOI: 10.1016/j.brainres.2023.148635] [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: 06/16/2023] [Revised: 09/12/2023] [Accepted: 10/14/2023] [Indexed: 10/20/2023]
Abstract
BACKGROUND AND PURPOSE Brain atrophy and disrupted functional connectivity are often present in patients with poststroke cognitive impairment (PSCI). This study aimed to explore the relationship between remote brain atrophy, connectional diaschisis and cognitive impairment in ischemic stroke patients to provide valuable information about the mechanisms underlying cognitive function recovery. METHODS Forty first-time stroke patients with basal ganglia infarcts and twenty-nine age-matched healthy people were enrolled. All participants underwent T1-weighted and functional MRI scans, comprehensive cognitive function assessments at baseline, and 3-month follow-up. Brain volumes were calculated, and the atrophic regions were regarded as regions of interest in seed-based functional connectivity analyses. Pearson correlation analysis was used to explore the relationships among cognitive performance, brain atrophy, and functional connectivity alterations. RESULTS Compared with healthy participants, stroke patients had worse cognitive performance at baseline and the 3-month follow-up. Worse cognitive performance was associated with smaller bilateral thalamus, left hippocampus, and left amygdala volumes, as well as lower functional connectivity between the left thalamus and the left medial superior frontal gyrus, between the right thalamus and the left median cingulate and paracingulate gyri, between the right hippocampus and the left medial superior frontal gyrus, and between the left amygdala and the right dorsolateral superior frontal gyrus. CONCLUSIONS In patients with basal ganglia infarction, connectional diaschisis between remote brain atrophy and the prefrontal lobe plays a significant role in PSCI. This finding provides new scientific evidence for understanding the mechanisms of PSCI and indicates that the prefrontal lobe may be a target to improve cognitive function after stroke.
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Affiliation(s)
- Weili Jia
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Yijun Zhou
- Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China
| | - Lijun Zuo
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China
| | - Tao Liu
- Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing, China.
| | - Zixiao Li
- Department of Neurology, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; China National Clinical Research Center for Neurological Diseases, Beijing, China; Chinese Institute for Brain Research, Beijing, China; Research Unit of Artificial Intelligence in Cerebrovascular Disease, Chinese Academy of Medical Sciences, Beijing, China.
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Sadeghzadeh J, Hosseini L, Mobed A, Zangbar HS, Jafarzadeh J, Pasban J, Shahabi P. The Impact of Cerebral Ischemia on Antioxidant Enzymes Activity and Neuronal Damage in the Hippocampus. Cell Mol Neurobiol 2023; 43:3915-3928. [PMID: 37740074 DOI: 10.1007/s10571-023-01413-w] [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: 02/27/2023] [Accepted: 09/09/2023] [Indexed: 09/24/2023]
Abstract
Cerebral ischemia and subsequent reperfusion, leading to reduced blood supply to specific brain areas, remain significant contributors to neurological damage, disability, and mortality. Among the vulnerable regions, the subcortical areas, including the hippocampus, are particularly susceptible to ischemia-induced injuries, with the extent of damage influenced by the different stages of ischemia. Neural tissue undergoes various changes and damage due to intricate biochemical reactions involving free radicals, oxidative stress, inflammatory responses, and glutamate toxicity. The consequences of these processes can result in irreversible harm. Notably, free radicals play a pivotal role in the neuropathological mechanisms following ischemia, contributing to oxidative stress. Therefore, the function of antioxidant enzymes after ischemia becomes crucial in preventing hippocampal damage caused by oxidative stress. This study explores hippocampal neuronal damage and enzymatic antioxidant activity during ischemia and reperfusion's early and late stages.
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Affiliation(s)
- Jafar Sadeghzadeh
- Department of Neuroscience and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Leila Hosseini
- Research Center of Psychiatry and Behavioral Sciences, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Ahmad Mobed
- Physical Medicine and Rehabilitation Research Center, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Hamid Soltani Zangbar
- Department of Neuroscience and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Jaber Jafarzadeh
- Department of Community Nutrition Faculty of Nutrition and Food Science, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Jamshid Pasban
- Department of Neuroscience and Cognition, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran
| | - Parviz Shahabi
- Department of Physiology, School of Medicine, Tabriz University of Medical Sciences, Tabriz, Islamic Republic of Iran.
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5
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Liang W, Miao J, Wang Y, Sun W, Pan C, Chen M, Li G, Lan Y, Qiu X, Zhao X, Jing P, Chen G, Mei J, Zhu Z. Longitudinal relationships between depressive symptoms and cognitive function after stroke: A cross-lagged panel design. J Psychosom Res 2023; 174:111486. [PMID: 37729753 DOI: 10.1016/j.jpsychores.2023.111486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 09/02/2023] [Accepted: 09/04/2023] [Indexed: 09/22/2023]
Abstract
OBJECTIVE Stroke is a leading cause of mortality and disability. This study aimed to investigate the temporal and directional relationships between post-stroke depressive symptoms and cognitive impairment using a cross-lagged panel design. Depressive symptoms and cognitive impairment are two common post-stroke complications. However, the precise underlying mechanism remains unclear despite their close relationship. Therefore, elucidating the causal relationship between these two issues is of great clinical significance for improving the poor prognosis of stroke. METHODS This study employed a hospital-based multicenter prospective cohort design. A total of 610 patients with ischemic stroke were eligible. Depressive symptoms (measured using the seventeen-item Hamilton Rating Scale for Depression) and cognitive function (measured using the Montreal Cognitive Assessment) were assessed at baseline and the 12-month follow-up. Spearman's correlation was used to examine the correlation between cognitive function and depressive symptoms. Additionally, a cross-lagged panel analysis was employed to elucidate the causal relationship between these factors after adjusting for potential covariates. RESULTS The results of a four-iteration cross-lagged panel analysis substantiated a bidirectional relationship between post-stroke depressive symptoms and cognitive function over time. Specifically, higher scores for early depressive symptoms were associated with lower scores for later cognitive function; additionally, higher baseline cognitive function scores were associated with lower depressive symptom scores at a later point. CONCLUSION This study establishes a reciprocally causal long-term relationship between depressive symptoms and cognitive function after an ischemic stroke. Therefore, interventions aimed at improving cognitive function and ameliorating depressive symptoms may positively affect both cognition and mood. TRIAL REGISTRATION ChiCTR-ROC-17013993.
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Affiliation(s)
- Wenwen Liang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Jinfeng Miao
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Yanyan Wang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Wenzhe Sun
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Chensheng Pan
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Man Chen
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Guo Li
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Yan Lan
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Xiuli Qiu
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Xin Zhao
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China
| | - Ping Jing
- Department of Neurology, Wuhan Central Hospital, Wuhan, Hubei 430014, China
| | - Guohua Chen
- Department of Neurology, Wuhan First Hospital, Wuhan, Hubei 430022, China
| | - Junhua Mei
- Department of Neurology, Wuhan First Hospital, Wuhan, Hubei 430022, China
| | - Zhou Zhu
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei 430030, China.
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Jones KT, Gallen CL, Ostrand AE, Rojas JC, Wais P, Rini J, Chan B, Lago AL, Boxer A, Zhao M, Gazzaley A, Zanto TP. Gamma neuromodulation improves episodic memory and its associated network in amnestic mild cognitive impairment: a pilot study. Neurobiol Aging 2023; 129:72-88. [PMID: 37276822 PMCID: PMC10583532 DOI: 10.1016/j.neurobiolaging.2023.04.005] [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: 09/06/2022] [Revised: 04/10/2023] [Accepted: 04/17/2023] [Indexed: 06/07/2023]
Abstract
Amnestic mild cognitive impairment (aMCI) is a predementia stage of Alzheimer's disease associated with dysfunctional episodic memory and limited treatment options. We aimed to characterize feasibility, clinical, and biomarker effects of noninvasive neurostimulation for aMCI. 13 individuals with aMCI received eight 60-minute sessions of 40-Hz (gamma) transcranial alternating current stimulation (tACS) targeting regions related to episodic memory processing. Feasibility, episodic memory, and plasma Alzheimer's disease biomarkers were assessed. Neuroplastic changes were characterized by resting-state functional connectivity (RSFC) and neuronal excitatory/inhibitory balance. Gamma tACS was feasible and aMCI participants demonstrated improvement in multiple metrics of episodic memory, but no changes in biomarkers. Improvements in episodic memory were most pronounced in participants who had the highest modeled tACS-induced electric fields and exhibited the greatest changes in RSFC. Increased RSFC was also associated with greater hippocampal excitability and higher baseline white matter integrity. This study highlights initial feasibility and the potential of gamma tACS to rescue episodic memory in an aMCI population by modulating connectivity and excitability within an episodic memory network.
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Affiliation(s)
- Kevin T Jones
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Neuroscape, University of California-San Francisco, San Francisco, CA.
| | - Courtney L Gallen
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Neuroscape, University of California-San Francisco, San Francisco, CA
| | - Avery E Ostrand
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Neuroscape, University of California-San Francisco, San Francisco, CA
| | - Julio C Rojas
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Weill Institute for Neurosciences, Memory and Aging Center, University of California-San Francisco, San Francisco, CA
| | - Peter Wais
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Neuroscape, University of California-San Francisco, San Francisco, CA
| | - James Rini
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Neuroscape, University of California-San Francisco, San Francisco, CA
| | - Brandon Chan
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Weill Institute for Neurosciences, Memory and Aging Center, University of California-San Francisco, San Francisco, CA
| | - Argentina Lario Lago
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Weill Institute for Neurosciences, Memory and Aging Center, University of California-San Francisco, San Francisco, CA
| | - Adam Boxer
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Weill Institute for Neurosciences, Memory and Aging Center, University of California-San Francisco, San Francisco, CA
| | - Min Zhao
- Departments of Ophthalmology and Vision Science and Dermatology, Institute for Regenerative Cures, University of California-Davis, Davis, CA
| | - Adam Gazzaley
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Neuroscape, University of California-San Francisco, San Francisco, CA; Departments of Physiology and Psychiatry, University of California-San Francisco, San Francisco, CA
| | - Theodore P Zanto
- Department of Neurology, University of California-San Francisco, San Francisco, CA; Neuroscape, University of California-San Francisco, San Francisco, CA.
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Schell M, Foltyn-Dumitru M, Bendszus M, Vollmuth P. Automated hippocampal segmentation algorithms evaluated in stroke patients. Sci Rep 2023; 13:11712. [PMID: 37474622 PMCID: PMC10359355 DOI: 10.1038/s41598-023-38833-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Accepted: 07/16/2023] [Indexed: 07/22/2023] Open
Abstract
Deep learning segmentation algorithms can produce reproducible results in a matter of seconds. However, their application to more complex datasets is uncertain and may fail in the presence of severe structural abnormalities-such as those commonly seen in stroke patients. In this investigation, six recent, deep learning-based hippocampal segmentation algorithms were tested on 641 stroke patients of a multicentric, open-source dataset ATLAS 2.0. The comparisons of the volumes showed that the methods are not interchangeable with concordance correlation coefficients from 0.266 to 0.816. While the segmentation algorithms demonstrated an overall good performance (volumetric similarity [VS] 0.816 to 0.972, DICE score 0.786 to 0.921, and Hausdorff distance [HD] 2.69 to 6.34), no single out-performing algorithm was identified: FastSurfer performed best in VS, QuickNat in DICE and average HD, and Hippodeep in HD. Segmentation performance was significantly lower for ipsilesional segmentation, with a decrease in performance as a function of lesion size due to the pathology-based domain shift. Only QuickNat showed a more robust performance in volumetric similarity. Even though there are many pre-trained segmentation methods, it is important to be aware of the possible decrease in performance for the segmentation results on the lesion side due to the pathology-based domain shift. The segmentation algorithm should be selected based on the research question and the evaluation parameter needed. More research is needed to improve current hippocampal segmentation methods.
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Affiliation(s)
- Marianne Schell
- Department of Neuroradiology, Heidelberg University Hospital, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Martha Foltyn-Dumitru
- Department of Neuroradiology, Heidelberg University Hospital, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Martin Bendszus
- Department of Neuroradiology, Heidelberg University Hospital, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany
| | - Philipp Vollmuth
- Department of Neuroradiology, Heidelberg University Hospital, Im Neuenheimer Feld 400, 69120, Heidelberg, Germany.
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8
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Verhulst MMLH, Glimmerveen AB, van Heugten CM, Helmich RCG, Hofmeijer J. MRI factors associated with cognitive functioning after acute onset brain injury: Systematic review and meta-analysis. Neuroimage Clin 2023; 38:103415. [PMID: 37119695 PMCID: PMC10165272 DOI: 10.1016/j.nicl.2023.103415] [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: 01/13/2023] [Revised: 03/22/2023] [Accepted: 04/19/2023] [Indexed: 05/01/2023]
Abstract
Impairments of memory, attention, and executive functioning are frequently reported after acute onset brain injury. MRI markers hold potential to contribute to identification of patients at risk for cognitive impairments and clarification of mechanisms. The aim of this systematic review was to summarize and value the evidence on MRI markers of memory, attention, and executive functioning after acute onset brain injury. We included ninety-eight studies, on six classes of MRI factors (location and severity of damage (n = 15), volume/atrophy (n = 36), signs of small vessel disease (n = 15), diffusion-weighted imaging measures (n = 36), resting-state functional MRI measures (n = 13), and arterial spin labeling measures (n = 1)). Three measures showed consistent results regarding their association with cognition. Smaller hippocampal volume was associated with worse memory in fourteen studies (pooled correlation 0.58 [95% CI: 0.46-0.68] for whole, 0.11 [95% CI: 0.04-0.19] for left, and 0.34 [95% CI: 0.17-0.49] for right hippocampus). Lower fractional anisotropy in cingulum and fornix was associated with worse memory in six and five studies (pooled correlation 0.20 [95% CI: 0.08-0.32] and 0.29 [95% CI: 0.20-0.37], respectively). Lower functional connectivity within the default-mode network was associated with worse cognition in four studies. In conclusion, hippocampal volume, fractional anisotropy in cingulum and fornix, and functional connectivity within the default-mode network showed consistent associations with cognitive performance in all types of acute onset brain injury. External validation and cut off values for predicting cognitive impairments are needed for clinical implementation.
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Affiliation(s)
- Marlous M L H Verhulst
- Clinical Neurophysiology, University of Twente, Enschede, The Netherlands; Department of Neurology, Rijnstate Hospital, Arnhem, The Netherlands.
| | - Astrid B Glimmerveen
- Clinical Neurophysiology, University of Twente, Enschede, The Netherlands; Department of Neurology, Rijnstate Hospital, Arnhem, The Netherlands
| | - Caroline M van Heugten
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience, Maastricht University, Maastricht, The Netherlands; Limburg Brain Injury Center, Maastricht University, Maastricht, The Netherlands; Department of Neuropsychology and Psychopharmacology, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - Rick C G Helmich
- Donders Institute for Brain, Cognition, and Behavior, Centre for Cognitive Neuroimaging, Radboud University Nijmegen, Nijmegen, The Netherlands; Department of Neurology, Centre of Expertise for Parkinson & Movement Disorders, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Jeannette Hofmeijer
- Clinical Neurophysiology, University of Twente, Enschede, The Netherlands; Department of Neurology, Rijnstate Hospital, Arnhem, The Netherlands
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Geng J, Gao F, Ramirez J, Honjo K, Holmes MF, Adamo S, Ozzoude M, Szilagyi GM, Scott CJM, Stebbins GT, Nyenhuis DL, Goubran M, Black SE. Secondary thalamic atrophy related to brain infarction may contribute to post-stroke cognitive impairment. J Stroke Cerebrovasc Dis 2023; 32:106895. [PMID: 36495644 DOI: 10.1016/j.jstrokecerebrovasdis.2022.106895] [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: 07/27/2022] [Revised: 10/24/2022] [Accepted: 11/10/2022] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND AND PURPOSE The thalamus is a key brain hub that is globally connected to many cortical regions. Previous work highlights thalamic contributions to multiple cognitive functions, but few studies have measured thalamic volume changes or cognitive correlates. This study investigates associations between thalamic volumes and post-stroke cognitive function. METHODS Participants with non-thalamic brain infarcts (3-42 months) underwent MRI and cognitive testing. Focal infarcts and thalami were traced manually. In cases with bilateral infarcts, the side of the primary infarct volume defined the hemisphere involved. Brain parcellation and volumetrics were extracted using a standardized and previously validated neuroimaging pipeline. Age and gender-matched healthy controls provided normal comparative thalamic volumes. Thalamic atrophy was considered when the volume exceeded 2 standard deviations greater than the controls. RESULTS Thalamic volumes ipsilateral to the infarct in stroke patients (n=55) were smaller than left (4.4 ± 1.4 vs. 5.4 ± 0.5 cc, p < 0.001) and right (4.4 ± 1.4 vs. 5.5 ± 0.6 cc, p < 0.001) thalamic volumes in the controls. After controlling for head-size and global brain atrophy, infarct volume independently correlated with ipsilateral thalamic volume (β= -0.069, p=0.024). Left thalamic atrophy correlated significantly with poorer cognitive performance (β = 4.177, p = 0.008), after controlling for demographics and infarct volumes. CONCLUSIONS Our results suggest that the remote effect of infarction on ipsilateral thalamic volume is associated with global post-stroke cognitive impairment.
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Affiliation(s)
- Jieli Geng
- Department of Neurology, Renji Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
| | - Fuqiang Gao
- LC Campbell Cognitive Neurology, Dr. Sandra Black Centre for Brain Resilience & Recovery, Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Ontario, Canada
| | - Joel Ramirez
- LC Campbell Cognitive Neurology, Dr. Sandra Black Centre for Brain Resilience & Recovery, Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Ontario, Canada; Heart and Stroke Foundation Canadian Partnership for Stroke Recovery (Sunnybrook site), Toronto, Ontario, Canada
| | - Kie Honjo
- LC Campbell Cognitive Neurology, Dr. Sandra Black Centre for Brain Resilience & Recovery, Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Ontario, Canada; Heart and Stroke Foundation Canadian Partnership for Stroke Recovery (Sunnybrook site), Toronto, Ontario, Canada
| | - Melissa F Holmes
- LC Campbell Cognitive Neurology, Dr. Sandra Black Centre for Brain Resilience & Recovery, Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Ontario, Canada
| | - Sabrina Adamo
- LC Campbell Cognitive Neurology, Dr. Sandra Black Centre for Brain Resilience & Recovery, Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Ontario, Canada
| | - Miracle Ozzoude
- LC Campbell Cognitive Neurology, Dr. Sandra Black Centre for Brain Resilience & Recovery, Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Ontario, Canada
| | - Gregory M Szilagyi
- LC Campbell Cognitive Neurology, Dr. Sandra Black Centre for Brain Resilience & Recovery, Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Ontario, Canada
| | - Christopher J M Scott
- LC Campbell Cognitive Neurology, Dr. Sandra Black Centre for Brain Resilience & Recovery, Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Ontario, Canada
| | - Glen T Stebbins
- Department of Neurological Sciences, Rush University Medical Center, Chicago, IL, USA
| | - David L Nyenhuis
- Hauenstein Neuroscience Center, Saint Mary's Health Care, Grand Rapids, MI, USA; LCC International University
| | - Maged Goubran
- LC Campbell Cognitive Neurology, Dr. Sandra Black Centre for Brain Resilience & Recovery, Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Ontario, Canada; Heart and Stroke Foundation Canadian Partnership for Stroke Recovery (Sunnybrook site), Toronto, Ontario, Canada; Department of Medical Biophysics, University of Toronto, Ontario, Canada
| | - Sandra E Black
- LC Campbell Cognitive Neurology, Dr. Sandra Black Centre for Brain Resilience & Recovery, Hurvitz Brain Sciences Research Program, Sunnybrook Research Institute, University of Toronto, Ontario, Canada; Heart and Stroke Foundation Canadian Partnership for Stroke Recovery (Sunnybrook site), Toronto, Ontario, Canada; Department of Medicine (Neurology), Sunnybrook Health Sciences Centre and University of Toronto, Ontario, Canada.
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10
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Cutia CA, Leverton LK, Christian-Hinman CA. Sex and estrous cycle stage shape left-right asymmetry in chronic hippocampal seizures in mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.01.20.524965. [PMID: 36712086 PMCID: PMC9882284 DOI: 10.1101/2023.01.20.524965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Lateralization of hippocampal function is indicated by varied outcomes of patients with neurological disorders that selectively affect one hemisphere of this structure, such as temporal lobe epilepsy (TLE). The intrahippocampal kainic acid (IHKA) injection model of TLE allows for targeted damage to the left or right hippocampus, enabling systematic comparison of effects of left-right asymmetry on seizure and non-seizure outcomes. Although varying non-seizure phenotypic outcomes based on injection side in dorsal hippocampus were recently evaluated in this model, differences in chronic seizure patterns in left- (IHKA-L) vs. right-injected (IHKA-R) IHKA animals have yet to be evaluated. Here, we evaluated hippocampal seizure incidence in male and female IHKA-L and IHKA-R mice. Females displayed increased electrographic seizure activity compared to males at both 2 months and 4 months post-injection (mpi). In addition, IHKA-L females showed higher seizure frequency than IHKA-R on diestrus and estrus at 2 mpi, but seizure duration and time in seizures were only higher in IHKA-L females on diestrus. These cycle stage-associated changes, however, did not persist to 4 mpi. Furthermore, this lateralized difference in seizure burden was not observed in males. These results indicate for the first time that the side of IHKA injection can shape chronic electrographic seizure burden. Overall, these results demonstrate a female-specific left-right asymmetry in hippocampal function can interact with estrous cycle stage to shape chronic seizures in mice with epilepsy, with implications for neural activity and behavior in both normal and disease states.
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Affiliation(s)
- Cathryn A. Cutia
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL, 61801 USA
| | - Leanna K. Leverton
- Department of Molecular and Integrative Physiology, University of Illinois Urbana-Champaign, Urbana, IL, 61801 USA
| | - Catherine A. Christian-Hinman
- Neuroscience Program, University of Illinois Urbana-Champaign, Urbana, IL, 61801 USA
- Department of Molecular and Integrative Physiology, University of Illinois Urbana-Champaign, Urbana, IL, 61801 USA
- Beckman Institute for Advanced Science and Technology, University of Illinois Urbana-Champaign, Urbana, IL, 61801 USA
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Abstract
Memory impairment occurs in over a third of patients after symptomatic stroke. Memory deficits rarely occur in isolation but are an important component of the poststroke cognitive syndrome because of the strong relationship with the risk of poststroke dementia. In this review, we summarize available data on impairment of episodic memory, with a particular emphasis on the natural history of memory impairment after stroke and the factors influencing trajectory informed by an updated systematic review. We next discuss the pathophysiology of memory impairment and mechanisms of both decline and recovery of function. We then turn to the practical issue of measurement of memory deficits after stroke, emerging biomarkers, and therapeutic approaches. Our review identifies critical gaps, particularly in studies of the natural history that properly map the long-term trajectory of memory and the associations with factors that modulate prognosis. Few studies have used advanced neuroimaging and this, in conjunction with other biomarker approaches, has the potential to provide a much richer understanding of the mechanisms at play and promising therapeutic avenues.
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Affiliation(s)
- Michael J O'Sullivan
- Institute for Molecular Bioscience, University of Queensland, St Lucia, Australia (M.J.O.).,UQ Centre for Clinical Research, Faculty of Medicine, University of Queensland, Herston, Australia (M.J.O., X.L., D.G.).,Department of Neurology, Royal Brisbane and Women's Hospital, QLD, Australia (M.J.O.)
| | - Xuqian Li
- UQ Centre for Clinical Research, Faculty of Medicine, University of Queensland, Herston, Australia (M.J.O., X.L., D.G.)
| | - Dana Galligan
- UQ Centre for Clinical Research, Faculty of Medicine, University of Queensland, Herston, Australia (M.J.O., X.L., D.G.)
| | - Sarah T Pendlebury
- Wolfson Centre for Prevention of Stroke and Dementia, Nuffield Department of Clinical Neurosciences, University of Oxford, United Kingdom (S.T.P.).,Departments of Medicine and Geratology and UK National Institute for Health and Care Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust, John Radcliffe Hospital, United Kingdom (S.T.P.)
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12
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Syeda W, Ermine CM, Khilf MS, Wright D, Brait VH, Nithianantharajah J, Kolbe S, Johnston LA, Thompson LH, Brodtmann A. Long-term structural brain changes in adult rats after mild ischaemic stroke. Brain Commun 2022; 4:fcac185. [PMID: 35898722 PMCID: PMC9309495 DOI: 10.1093/braincomms/fcac185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2021] [Revised: 03/09/2022] [Accepted: 07/20/2022] [Indexed: 11/13/2022] Open
Abstract
Preclinical studies of remote degeneration have largely focused on brain changes over the first few days or weeks after stroke. Accumulating evidence suggests that neurodegeneration occurs in other brain regions remote to the site of infarction for months and even years following ischaemic stroke. Brain atrophy appears to be driven by both axonal degeneration and widespread brain inflammation. The evolution and duration of these changes are increasingly being described in human studies, using advanced brain imaging techniques. Here, we sought to investigate long-term structural brain changes in a model of mild focal ischaemic stroke following injection of endothlin-1 in adult Long–Evans rats (n = 14) compared with sham animals (n = 10), over a clinically relevant time-frame of 48 weeks. Serial structural and diffusion-weighted MRI data were used to assess dynamic volume and white matter trajectories. We observed dynamic regional brain volume changes over the 48 weeks, reflecting both normal changes with age in sham animals and neurodegeneration in regions connected to the infarct following ischaemia. Ipsilesional cortical volume loss peaked at 24 weeks but was less prominent at 36 and 48 weeks. We found significantly reduced fractional anisotropy in both ipsi- and contralesional motor cortex and cingulum bundle regions of infarcted rats (P < 0.05) from 4 to 36 weeks, suggesting ongoing white matter degeneration in tracts connected to but distant from the stroke. We conclude that there is evidence of significant cortical atrophy and white matter degeneration up to 48 weeks following infarct, consistent with enduring, pervasive stroke-related degeneration.
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Affiliation(s)
- Warda Syeda
- The Florey Institute of Neuroscience and Mental Health , Parkville, Victoria , Australia
- Melbourne Neuropsychiatry Centre, The University of Melbourne , Parkville, Victoria , Australia
| | - Charlotte M Ermine
- The Florey Institute of Neuroscience and Mental Health , Parkville, Victoria , Australia
| | - Mohamed Salah Khilf
- The Florey Institute of Neuroscience and Mental Health , Parkville, Victoria , Australia
| | - David Wright
- Department of Neuroscience, Monash University , Clayton , Australia
| | - Vanessa H Brait
- The Florey Institute of Neuroscience and Mental Health , Parkville, Victoria , Australia
| | - Jess Nithianantharajah
- The Florey Institute of Neuroscience and Mental Health , Parkville, Victoria , Australia
| | - Scott Kolbe
- Department of Neuroscience, Monash University , Clayton , Australia
| | - Leigh A Johnston
- The Melbourne Brain Centre Imaging Unit, The University of Melbourne , Parkville, Victoria , Australia
- Department of Biomedical Engineering, The University of Melbourne , Parkville, Victoria , Australia
| | - Lachlan H Thompson
- The Florey Institute of Neuroscience and Mental Health , Parkville, Victoria , Australia
| | - Amy Brodtmann
- The Florey Institute of Neuroscience and Mental Health , Parkville, Victoria , Australia
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13
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Zavaliangos‐Petropulu A, Lo B, Donnelly MR, Schweighofer N, Lohse K, Jahanshad N, Barisano G, Banaj N, Borich MR, Boyd LA, Buetefisch CM, Byblow WD, Cassidy JM, Charalambous CC, Conforto AB, DiCarlo JA, Dula AN, Egorova‐Brumley N, Etherton MR, Feng W, Fercho KA, Geranmayeh F, Hanlon CA, Hayward KS, Hordacre B, Kautz SA, Khlif MS, Kim H, Kuceyeski A, Lin DJ, Liu J, Lotze M, MacIntosh BJ, Margetis JL, Mohamed FB, Piras F, Ramos‐Murguialday A, Revill KP, Roberts PS, Robertson AD, Schambra HM, Seo NJ, Shiroishi MS, Stinear CM, Soekadar SR, Spalletta G, Taga M, Tang WK, Thielman GT, Vecchio D, Ward NS, Westlye LT, Werden E, Winstein C, Wittenberg GF, Wolf SL, Wong KA, Yu C, Brodtmann A, Cramer SC, Thompson PM, Liew S. Chronic Stroke Sensorimotor Impairment Is Related to Smaller Hippocampal Volumes: An ENIGMA Analysis. J Am Heart Assoc 2022; 11:e025109. [PMID: 35574963 PMCID: PMC9238563 DOI: 10.1161/jaha.121.025109] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2021] [Accepted: 03/29/2022] [Indexed: 11/22/2022]
Abstract
Background Persistent sensorimotor impairments after stroke can negatively impact quality of life. The hippocampus is vulnerable to poststroke secondary degeneration and is involved in sensorimotor behavior but has not been widely studied within the context of poststroke upper-limb sensorimotor impairment. We investigated associations between non-lesioned hippocampal volume and upper limb sensorimotor impairment in people with chronic stroke, hypothesizing that smaller ipsilesional hippocampal volumes would be associated with greater sensorimotor impairment. Methods and Results Cross-sectional T1-weighted magnetic resonance images of the brain were pooled from 357 participants with chronic stroke from 18 research cohorts of the ENIGMA (Enhancing NeuoImaging Genetics through Meta-Analysis) Stroke Recovery Working Group. Sensorimotor impairment was estimated from the FMA-UE (Fugl-Meyer Assessment of Upper Extremity). Robust mixed-effects linear models were used to test associations between poststroke sensorimotor impairment and hippocampal volumes (ipsilesional and contralesional separately; Bonferroni-corrected, P<0.025), controlling for age, sex, lesion volume, and lesioned hemisphere. In exploratory analyses, we tested for a sensorimotor impairment and sex interaction and relationships between lesion volume, sensorimotor damage, and hippocampal volume. Greater sensorimotor impairment was significantly associated with ipsilesional (P=0.005; β=0.16) but not contralesional (P=0.96; β=0.003) hippocampal volume, independent of lesion volume and other covariates (P=0.001; β=0.26). Women showed progressively worsening sensorimotor impairment with smaller ipsilesional (P=0.008; β=-0.26) and contralesional (P=0.006; β=-0.27) hippocampal volumes compared with men. Hippocampal volume was associated with lesion size (P<0.001; β=-0.21) and extent of sensorimotor damage (P=0.003; β=-0.15). Conclusions The present study identifies novel associations between chronic poststroke sensorimotor impairment and ipsilesional hippocampal volume that are not caused by lesion size and may be stronger in women.
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Affiliation(s)
- Artemis Zavaliangos‐Petropulu
- Mark and Mary Stevens Neuroimaging and Informatics InstituteKeck School of Medicine, University of Southern CaliforniaLos AngelesCA
- Neuroscience Graduate ProgramUniversity of Southern CaliforniaLos AngelesCA
| | - Bethany Lo
- Chan Division of Occupational Science and Occupational TherapyUniversity of Southern CaliforniaLos AngelesCA
| | - Miranda R. Donnelly
- Chan Division of Occupational Science and Occupational TherapyUniversity of Southern CaliforniaLos AngelesCA
| | - Nicolas Schweighofer
- Biokinesiology and Physical TherapyUniversity of Southern CaliforniaLos AngelesCA
| | - Keith Lohse
- Physical Therapy and NeurologyWashington University School of Medicine in Saint LouisMO
| | - Neda Jahanshad
- Mark and Mary Stevens Neuroimaging and Informatics InstituteKeck School of Medicine, University of Southern CaliforniaLos AngelesCA
| | - Giuseppe Barisano
- Mark and Mary Stevens Neuroimaging and Informatics InstituteKeck School of Medicine, University of Southern CaliforniaLos AngelesCA
- Neuroscience Graduate ProgramUniversity of Southern CaliforniaLos AngelesCA
| | - Nerisa Banaj
- Laboratory of NeuropsychiatryIRCCS Santa Lucia FoundationRomeItaly
| | - Michael R. Borich
- Division of Physical TherapyDepartment of Rehabilitation MedicineEmory University School of MedicineAtlantaGA
| | - Lara A. Boyd
- Department of Physical TherapyUniversity of British ColumbiaVancouverCanada
| | | | - Winston D. Byblow
- Department of Exercise Sciences, and Centre for Brain ResearchUniversity of AucklandNew Zealand
| | - Jessica M. Cassidy
- Department of Allied Health SciencesUniversity of North Carolina at Chapel HillNC
| | - Charalambos C. Charalambous
- Department of Basic and Clinical SciencesUniversity of Nicosia Medical SchoolNicosiaCyprus
- Center for Neuroscience and Integrative Brain Research (CENIBRE)NicosiaCyprus
| | - Adriana B. Conforto
- Hospital das ClínicasSão Paulo UniversitySão PauloBrazil
- Hospital Israelita Albert EinsteinSão PauloBrazil
| | - Julie A. DiCarlo
- Center for Neurotechnology and Neurorecovery (CNTR)Massachusetts General HospitalBostonMA
| | - Adrienne N. Dula
- Department of NeurologyDell Medical SchoolUniversity of Texas at AustinTX
| | | | - Mark R. Etherton
- Department of NeurologyJ. Philip Kistler Stroke Research CenterMassachusetts General HospitalBostonMA
| | - Wuwei Feng
- Department of NeurologyDuke University School of MedicineDurhamNC
| | - Kelene A. Fercho
- Basic Biomedical SciencesUniversity of South DakotaVermillionSD
- Federal Aviation AdministrationCivil Aerospace Medical InstituteOklahoma CityOK
| | | | | | - Kathryn S. Hayward
- Departments of Physiotherapy and Medicine, University of MelbourneHeidelbergVictoriaAustralia
- The Florey Institute of Neuroscience and Mental HealthHeidelbergVictoriaAustralia
| | - Brenton Hordacre
- Innovation, Implementation and Clinical Translation (IIMPACT) in HealthAllied Health and Human PerformanceUniversity of South AustraliaAdelaideSouth AustraliaAustralia
| | - Steven A. Kautz
- Ralph H Johnson Veterans Affairs Medical CenterCharlestonSC
- Department of Health Sciences & ResearchMedical University of South CarolinaCharlestonSC
| | - Mohamed Salah Khlif
- The Florey Institute of Neuroscience and Mental HealthHeidelbergVictoriaAustralia
| | - Hosung Kim
- Mark and Mary Stevens Neuroimaging and Informatics InstituteKeck School of Medicine, University of Southern CaliforniaLos AngelesCA
| | - Amy Kuceyeski
- Department of RadiologyWeill Cornell MedicineNew YorkNY
| | - David J. Lin
- Center for Neurotechnology and Neurorecovery (CNTR)Massachusetts General HospitalBostonMA
| | - Jingchun Liu
- Department of RadiologyTianjin Medical University General HospitalTianjinChina
| | - Martin Lotze
- Functional ImagingInstitute for Diagnostic Radiology and NeuroradiologyUniversity Medicine GreifswaldGermany
| | - Bradley J. MacIntosh
- Hurvitz Brain Sciences ProgramSunnybrook Research InstituteTorontoCanada
- Department of Medical BiophysicsUniversity of TorontoOntarioCanada
| | - John L. Margetis
- Chan Division of Occupational Science and Occupational TherapyUniversity of Southern CaliforniaLos AngelesCA
| | - Feroze B. Mohamed
- Department of RadiologyJefferson Integrated MR CenterThomas Jefferson UniversityPhiladelphiaPA
| | - Fabrizio Piras
- Laboratory of NeuropsychiatryIRCCS Santa Lucia FoundationRomeItaly
| | - Ander Ramos‐Murguialday
- Institute of Medical Psychology and Behavioral NeurobiologyUniversity of TübingenGermany
- Health DivisionTECNALIASan SebastianSpain
| | | | - Pamela S. Roberts
- Chan Division of Occupational Science and Occupational TherapyUniversity of Southern CaliforniaLos AngelesCA
- Department of Physical Medicine and RehabilitationCedars‐SinaiLos AngelesCA
| | - Andrew D. Robertson
- Department of Kinesiology and Health SciencesUniversity of WaterlooOntarioCanada
| | - Heidi M. Schambra
- Departments of Neurology & Rehabilitation MedicineNYU LangoneNew YorkNY
| | - Na Jin Seo
- Ralph H Johnson Veterans Affairs Medical CenterCharlestonSC
- Department of Rehabilitation SciencesDepartment of Health Science and ResearchMedical University of South CarolinaCharlestonSC
| | - Mark S. Shiroishi
- Mark and Mary Stevens Neuroimaging and Informatics InstituteKeck School of Medicine, University of Southern CaliforniaLos AngelesCA
- Department of RadiologyKeck School of MedicineUniversity of Southern CaliforniaLos AngelesCA
| | | | - Surjo R. Soekadar
- Clinical Neurotechnology LaboratoryDepartment of Psychiatry and Neurosciences (CCM)Charité ‐ Universitätsmedizin BerlinBerlinGermany
| | | | - Myriam Taga
- NYU Langone Department of NeurologyNew YorkNY
| | - Wai Kwong Tang
- Department of PsychiatryThe Chinese University of Hong KongChina
| | - Gregory T. Thielman
- Department of Physical Therapy and NeuroscienceUniversity of the SciencesPhiladelphiaPA
| | - Daniela Vecchio
- Laboratory of NeuropsychiatryIRCCS Santa Lucia FoundationRomeItaly
| | - Nick S. Ward
- University College London Queen Square Institute of NeurologyLondonUnited Kingdom
| | - Lars T. Westlye
- Department of PsychologyUniversity of OsloNorway
- Department of Mental Health and AddictionOslo University HospitalOsloNorway
| | - Emilio Werden
- The Florey Institute of Neuroscience and Mental HealthHeidelbergVictoriaAustralia
- Melbourne Dementia Research CenterUniversity of MelbourneVictoriaAustralia
| | - Carolee Winstein
- Biokinesiology and Physical TherapyUniversity of Southern CaliforniaLos AngelesCA
| | - George F. Wittenberg
- Department of NeurologyUniversity of PittsburghPA
- Department of Veterans AffairsGeriatrics Research Educational & Clinical CenterVeterans Affairs Pittsburgh Healthcare System (VAPHS)PittsburghPA
| | - Steven L. Wolf
- Division of Physical TherapyDepartment of Rehabilitation MedicineEmory University School of MedicineAtlantaGA
- Department of MedicineEmory University School of MedicineAtlantaGA
| | - Kristin A. Wong
- Department of Physical Medicine & RehabilitationDell Medical SchoolUniversity of Texas at AustinTX
| | - Chunshui Yu
- Department of RadiologyTianjin Medical University General HospitalTianjinChina
| | - Amy Brodtmann
- The Florey Institute of Neuroscience and Mental HealthHeidelbergVictoriaAustralia
| | - Steven C. Cramer
- Department of NeurologyUniversity of California Los AngelesDavid Geffen School of MedicineLos AngelesCA
- California Rehabilitation HospitalLos AngelesCA
| | - Paul M. Thompson
- Mark and Mary Stevens Neuroimaging and Informatics InstituteKeck School of Medicine, University of Southern CaliforniaLos AngelesCA
| | - Sook‐Lei Liew
- Mark and Mary Stevens Neuroimaging and Informatics InstituteKeck School of Medicine, University of Southern CaliforniaLos AngelesCA
- Chan Division of Occupational Science and Occupational TherapyUniversity of Southern CaliforniaLos AngelesCA
- Biokinesiology and Physical TherapyUniversity of Southern CaliforniaLos AngelesCA
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He M, Li Y, Zhou L, Li Y, Lei T, Yan W, Song J, Chen L. Relationships Between Memory Impairments and Hippocampal Structure in Patients With Subcortical Ischemic Vascular Disease. Front Aging Neurosci 2022; 14:823535. [PMID: 35517055 PMCID: PMC9062133 DOI: 10.3389/fnagi.2022.823535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Accepted: 03/21/2022] [Indexed: 11/13/2022] Open
Abstract
Background and PurposePatients with subcortical ischemic vascular disease (SIVD) suffer from memory disorders that are thought to be associated with the hippocampus. We aimed to explore changes in hippocampal subfields and the relationship between different hippocampal subfield volumes and different types of memory dysfunction in SIVD patients.MethodsA total of 77 SIVD patients with cognitive impairment (SIVD-CI, n = 39) or normal cognition (HC-SIVD, n = 38) and 41 matched healthy controls (HCs) were included in this study. Memory function was measured in all subjects, and structural magnetic resonance imaging (MRI) was performed. Then, the hippocampus was segmented and measured by FreeSurfer 6.0 software. One-way ANOVA was used to compare the volume of hippocampal subfields among the three groups while controlling for age, sex, education and intracranial volume (ICV). Then, post hoc tests were used to evaluate differences between each pair of groups. Finally, correlations between significantly different hippocampal subfield volumes and memory scores were tested in SIVD patients.ResultsAlmost all hippocampal subfields were significantly different among the three groups except for the bilateral hippocampal fissure (p = 0.366, p = 0.086, respectively.) and left parasubiculum (p = 0.166). Furthermore, the SIVD-CI patients showed smaller volumes in the right subiculum (p < 0.001), CA1 (p = 0.002), presubiculum (p = 0.002) and molecular layer of the hippocampus (p = 0.017) than the HC-SIVD patients. In addition, right subiculum volumes were positively related to Rey’s Auditory Verbal Learning Test (RAVLT) word recognition (r = 0.230, p = 0.050), reverse digit span test (R-DST) (r = 0.326, p = 0.005) and Rey–Osterrieth Complex Figure Test (ROCF) immediate recall (r = 0.247, p = 0.035) scores, right CA1 volumes were positively correlated with RAVLT word recognition (r = 0.261, p = 0.026), and right presubiculum volumes showed positive relationships with R-DST (r = 0.254, p = 0.030) and ROCF immediate recall (r = 0.242, p = 0.039) scores.ConclusionSIVD might lead to general reductions in volume in multiple hippocampal subfields. However, SIVD-CI patients showed atrophy in specific subfields, which might be associated with memory deficits.
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Affiliation(s)
- Miao He
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
- Department of Radiology, Gaoping District People’s Hospital, Nanchong, China
| | - Yang Li
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Lijing Zhou
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Yajun Li
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Ting Lei
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Wei Yan
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Jiarui Song
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
| | - Li Chen
- Department of Radiology, Affiliated Hospital of North Sichuan Medical College, Nanchong, China
- *Correspondence: Li Chen,
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15
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Harris MJ, Lane CA, Coath W, Malone IB, Cash DM, Barnes J, Barkhof F, Schott JM. Familial British dementia: a clinical and multi-modal imaging case study. J Neurol 2022; 269:3926-3930. [PMID: 35229189 DOI: 10.1007/s00415-022-11036-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/15/2022] [Accepted: 02/16/2022] [Indexed: 11/26/2022]
Affiliation(s)
- Matthew J Harris
- Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Christopher A Lane
- Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - William Coath
- Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Ian B Malone
- Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - David M Cash
- Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
- Dementia Research Institute, UCL Institute of Neurology, London, UK
| | - Josephine Barnes
- Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK
| | - Frederik Barkhof
- Queen Square Institute of Neurology and Centre for Medical Image Computing (CMIC), UCL Institute of Neurology, London, UK
- Department of Radiology and Nuclear Medicine, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Jonathan M Schott
- Dementia Research Centre, UCL Institute of Neurology, Queen Square, London, WC1N 3BG, UK.
- Dementia Research Institute, UCL Institute of Neurology, London, UK.
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16
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Post-Ischemic Neurodegeneration of the Hippocampus Resembling Alzheimer's Disease Proteinopathy. Int J Mol Sci 2021; 23:ijms23010306. [PMID: 35008731 PMCID: PMC8745293 DOI: 10.3390/ijms23010306] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2021] [Revised: 12/26/2021] [Accepted: 12/26/2021] [Indexed: 12/14/2022] Open
Abstract
In this review, we summarize, inter alia, the protein and gene changes associated with Alzheimer’s disease and their role in post-ischemic hippocampal neurodegeneration. In the hippocampus, studies have revealed dysregulation of the genes for the amyloid protein precursor metabolism and tau protein that is identical in nature to Alzheimer’s disease. Data indicate that amyloid and tau protein, derived from brain tissue and blood due to increased permeability of the blood–brain barrier after ischemia, play a key role in post-ischemic neurodegeneration of the hippocampus, with concomitant development of full-blown dementia. Thus, the knowledge of new neurodegenerative mechanisms that cause neurodegeneration of the hippocampus after ischemia, resembling Alzheimer’s disease proteinopathy, will provide the most important therapeutic development goals to date.
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17
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Brown GC. Neuronal Loss after Stroke Due to Microglial Phagocytosis of Stressed Neurons. Int J Mol Sci 2021; 22:13442. [PMID: 34948237 PMCID: PMC8707068 DOI: 10.3390/ijms222413442] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/09/2021] [Accepted: 12/10/2021] [Indexed: 11/17/2022] Open
Abstract
After stroke, there is a rapid necrosis of all cells in the infarct, followed by a delayed loss of neurons both in brain areas surrounding the infarct, known as 'selective neuronal loss', and in brain areas remote from, but connected to, the infarct, known as 'secondary neurodegeneration'. Here we review evidence indicating that this delayed loss of neurons after stroke is mediated by the microglial phagocytosis of stressed neurons. After a stroke, neurons are stressed by ongoing ischemia, excitotoxicity and/or inflammation and are known to: (i) release "find-me" signals such as ATP, (ii) expose "eat-me" signals such as phosphatidylserine, and (iii) bind to opsonins, such as complement components C1q and C3b, inducing microglia to phagocytose such neurons. Blocking these factors on neurons, or their phagocytic receptors on microglia, can prevent delayed neuronal loss and behavioral deficits in rodent models of ischemic stroke. Phagocytic receptors on microglia may be attractive treatment targets to prevent delayed neuronal loss after stroke due to the microglial phagocytosis of stressed neurons.
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Affiliation(s)
- Guy C Brown
- Department of Biochemistry, University of Cambridge, Cambridge CB2 1QW, UK
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18
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Khlif MS, Werden E, Bird LJ, Egorova-Brumley N, Brodtmann A. Atrophy of Ipsilesional Hippocampal Subfields Vary Over First Year After Ischemic Stroke. J Magn Reson Imaging 2021; 56:273-281. [PMID: 34837426 DOI: 10.1002/jmri.28009] [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: 10/05/2021] [Revised: 11/15/2021] [Accepted: 11/17/2021] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND The structural integrity of hippocampal subfields has been investigated in many neurological disorders and was shown to be better associated with cognitive performance than whole hippocampus. In stroke, hippocampal atrophy is linked to cognitive impairment, but it is unknown whether the hippocampal subfields atrophy differently. PURPOSE To evaluate longitudinal hippocampal subfield atrophy in first year poststroke, in comparison with atrophy in healthy individuals. STUDY TYPE Cohort. SUBJECTS A total of 92 ischemic stroke (age: 67 ± 12 years, 63 men) and 39 healthy participants (age: 69 ± 7 years, 24 men). FIELD STRENGTH/SEQUENCE A3 T/T1-MPRAGE, T2-SPACE, and T2-FLAIR. ASSESSMENT FreeSurfer (6.0) was used to delineate 12 hippocampal subfields. Whole hippocampal volume was computed as sum of subfield volumes excluding hippocampal fissure volume. Separate assessments were completed for contralesional and ipsilesional hippocampi. STATISTICAL TESTS A mixed-effect regression model was used to compare subfield volumes cross-sectionally between healthy and stroke groups and longitudinally between 3-month and 12-month timepoints. False discovery rate at 0.05 significance level was used to correct for multiple comparisons. Also, a receiver operating characteristic (ROC) curve analysis was performed to assess differentiation between healthy and stroke participants based on subfield volumes. RESULTS There were no volume differences between groups at 3 months, but there was a significant difference (P = 0.027) in whole hippocampal volume reduction over time between control and stroke ipsilesionally. Thus, the ipsilesional whole hippocampal volume in stroke became significantly smaller (P = 0.035) at 12 months. The hippocampal tail was the highest single-region contributor (22.7%) to ipsilesional hippocampal atrophy (1.19%) over 9 months. The cornu ammonis areas (CA1) subfield volume reduction was minimal in controls and stroke contralesionally but significant ipsilesionally (P = 0.007). CA1 volume significantly outperformed whole hippocampal volume (P < 0.01) in discriminating between stroke participants and healthy controls in ROC curve analysis. DATA CONCLUSION Greater stroke-induced effects were observed in the ipsilesional hippocampus anteriorly in CA1 and posteriorly in the hippocampal tail. Atrophy of CA1 and hippocampal tail may provide a better link to cognitive impairment than whole hippocampal atrophy. LEVEL OF EVIDENCE 2 TECHNICAL EFFICACY STAGE: 3.
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Affiliation(s)
- Mohamed Salah Khlif
- The Florey Institute for Neuroscience and Mental Health, University of Melbourne, Melbourne, Australia
| | - Emilio Werden
- The Florey Institute for Neuroscience and Mental Health, University of Melbourne, Melbourne, Australia
| | - Laura J Bird
- The Florey Institute for Neuroscience and Mental Health, University of Melbourne, Melbourne, Australia
| | - Natalia Egorova-Brumley
- The Florey Institute for Neuroscience and Mental Health, University of Melbourne, Melbourne, Australia.,Melbourne School of Psychological Sciences, University of Melbourne, Melbourne, Australia
| | - Amy Brodtmann
- The Florey Institute for Neuroscience and Mental Health, University of Melbourne, Melbourne, Australia.,Department of Neurology, Austin Health, Heidelberg, Victoria, Australia.,Department of Neurology, Royal Melbourne Hospital, Parkville, Victoria, Australia.,Eastern Cognitive Disorders Clinic, Box Hill Hospital, Monash University, Box Hill, Victoria, Australia
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19
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Ermine CM, Nithianantharajah J, O'Brien K, Kauhausen JA, Frausin S, Oman A, Parsons MW, Brait VH, Brodtmann A, Thompson LH. Hemispheric cortical atrophy and chronic microglial activation following mild focal ischemic stroke in adult male rats. J Neurosci Res 2021; 99:3222-3237. [PMID: 34651338 DOI: 10.1002/jnr.24939] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2021] [Accepted: 07/14/2021] [Indexed: 01/05/2023]
Abstract
Animal modeling has played an important role in our understanding of the pathobiology of stroke. The vast majority of this research has focused on the acute phase following severe forms of stroke that result in clear behavioral deficits. Human stroke, however, can vary widely in severity and clinical outcome. There is a rapidly building body of work suggesting that milder ischemic insults can precipitate functional impairment, including cognitive decline, that continues through the chronic phase after injury. Here we show that a small infarction localized to the frontal motor cortex of rats following injection of endothelin-1 results in an essentially asymptomatic state based on motor and cognitive testing, and yet produces significant histopathological change including remote atrophy and inflammation that persists up to 1 year. While there is understandably a major focus in stroke research on mitigating the acute consequences of primary infarction, these results point to progressive atrophy and chronic inflammation as additional targets for intervention in the chronic phase after injury. The present rodent model provides an important platform for further work in this area.
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Affiliation(s)
- Charlotte M Ermine
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC, Australia
| | - Jess Nithianantharajah
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC, Australia
| | - Katrina O'Brien
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC, Australia
| | - Jessica A Kauhausen
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC, Australia
| | - Stefano Frausin
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC, Australia
| | - Alexander Oman
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC, Australia
| | - Mark W Parsons
- Melbourne Brain Centre, University of Melbourne, Melbourne, VIC, Australia.,Department of Neurology, University of New Wales South Western Clinical School, Ingham Institute for Applied Medical Research, Liverpool, NSW, Australia
| | - Vanessa H Brait
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC, Australia
| | - Amy Brodtmann
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC, Australia.,Department of Neurology, Austin Health, Melbourne, VIC, Australia.,Eastern Cognitive Disorders Clinic, Eastern Health, Monash University, Clayton, VIC, Australia
| | - Lachlan H Thompson
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Melbourne, VIC, Australia
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20
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Huo K, Wei M, Zhang M, Wang Z, Pan P, Shaligram SS, Huang J, Prado LBD, Wong J, Su H. Reduction of neuroinflammation alleviated mouse post bone fracture and stroke memory dysfunction. J Cereb Blood Flow Metab 2021; 41:2162-2173. [PMID: 33641516 PMCID: PMC8393305 DOI: 10.1177/0271678x21996177] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Tibia fracture (BF) enhances stroke injury and post-stroke memory dysfunction in mouse. Reduction of neuroinflammation by activation of α-7 nicotinic acetylcholine receptor (α-7 nAchR) reduced acute neuronal injury and sensorimotor dysfunction in mice with BF 1-day after stroke. We hypothesize that reduction of neuroinflammation by activation of α-7 nAchR improves long-term memory function of mice with BF 6-h before stroke. The mice were randomly assigned to saline, PHA-568487 (α-7 nAchR agonist) and methyllycaconitine (antagonist) treatment groups. The sensorimotor function was tested by adhesive removal and corner tests at 3 days, the memory function was tested by Y-maze test weekly for 8 weeks and novel objective recognition test at 8 weeks post-injuries. We found PHA-568487 treatment reduced, methyllycaconitine increased the number of CD68+ cells in the peri-infarct and hippocampal regions, neuronal injury in the infarct region, sensorimotor and long-term memory dysfunctions. PHA-568487 treatment also reduced, while methyllycaconitine treatment increased atrophy of hippocampal granule cell layer and white matter damage in the striatum. In addition, PHA-568487 treatment increased neuron proliferation in granule cell layer. Our data indicated that reduction of neuroinflammation through activation of α-7 nAchR decreased neuronal damage, sensorimotor and long-term memory dysfunction of mice with BF shortly before stroke.
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Affiliation(s)
- Kang Huo
- Center for Cerebrovascular Research, Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
| | - Meng Wei
- Center for Cerebrovascular Research, Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
| | - Meng Zhang
- Center for Cerebrovascular Research, Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
| | - Zhanqiang Wang
- Center for Cerebrovascular Research, Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
| | - Peipei Pan
- Center for Cerebrovascular Research, Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
| | - Sonali S Shaligram
- Center for Cerebrovascular Research, Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
| | - Jinhao Huang
- Center for Cerebrovascular Research, Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
| | - Leandro B Do Prado
- Center for Cerebrovascular Research, Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
| | - Julia Wong
- Center for Cerebrovascular Research, Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
| | - Hua Su
- Center for Cerebrovascular Research, Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
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21
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Faillot M, Chaillet A, Palfi S, Senova S. Rodent models used in preclinical studies of deep brain stimulation to rescue memory deficits. Neurosci Biobehav Rev 2021; 130:410-432. [PMID: 34437937 DOI: 10.1016/j.neubiorev.2021.08.012] [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: 02/08/2021] [Revised: 08/10/2021] [Accepted: 08/13/2021] [Indexed: 11/28/2022]
Abstract
Deep brain stimulation paradigms might be used to treat memory disorders in patients with stroke or traumatic brain injury. However, proof of concept studies in animal models are needed before clinical translation. We propose here a comprehensive review of rodent models for Traumatic Brain Injury and Stroke. We systematically review the histological, behavioral and electrophysiological features of each model and identify those that are the most relevant for translational research.
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Affiliation(s)
- Matthieu Faillot
- Neurosurgery department, Henri Mondor University Hospital, APHP, DMU CARE, Université Paris Est Créteil, Mondor Institute for Biomedical Research, INSERM U955, Team 15, Translational Neuropsychiatry, France
| | - Antoine Chaillet
- Laboratoire des Signaux et Systèmes (L2S-UMR8506) - CentraleSupélec, Université Paris Saclay, Institut Universitaire de France, France
| | - Stéphane Palfi
- Neurosurgery department, Henri Mondor University Hospital, APHP, DMU CARE, Université Paris Est Créteil, Mondor Institute for Biomedical Research, INSERM U955, Team 15, Translational Neuropsychiatry, France
| | - Suhan Senova
- Neurosurgery department, Henri Mondor University Hospital, APHP, DMU CARE, Université Paris Est Créteil, Mondor Institute for Biomedical Research, INSERM U955, Team 15, Translational Neuropsychiatry, France.
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22
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Liu C, Liu H, Wu D, Zhou Z, Huang W, Wu Z, Zi W, Yang Q. Severe Brain Atrophy Predicts Poor Clinical Outcome After Endovascular Treatment of Acute Basilar Artery Occlusion: An Automated Volumetric Analysis of a Nationwide Registry. Front Aging Neurosci 2021; 13:720061. [PMID: 34483888 PMCID: PMC8416246 DOI: 10.3389/fnagi.2021.720061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Accepted: 07/20/2021] [Indexed: 11/26/2022] Open
Abstract
Background: Brain atrophy globally reflects the effects of preexisting risk factors and biological aging on brain structures and normally predicts poor outcomes in anterior circulation stroke. However, comparing with these patients, acute basilar artery occlusion (ABAO) impairs infratentorial regions frequently and might benefit from brain atrophy due to the resulting residual space to reduce tissue compression and thus improve prognosis, which raises doubts that current understandings for prognostic roles of brain atrophy are also applicable for ABAO. Therefore, this study aims to evaluate brain atrophy automatically from CT images and investigates its impact on outcomes of ABAO following endovascular treatment (EVT). Methods: A total of 231 ABAO who underwent EVT from the BASILAR registry were enrolled. Brain atrophy was quantified as the ratio of brain parenchymal volume to cerebrospinal fluid volume on baseline CT. The primary outcome was the modified Rankin Scale (mRS) score at 3 months. Results: The frequency of favorable outcomes (90-day mRS ≤ 3) was significantly lower in the severe atrophy group (P = 0.014). Adjusted logistic models revealed that severe brain atrophy was significantly negatively associated with favorable outcome incidence (P = 0.006), with no relationship with either in-hospital or 90-day overall mortality (all P > 0.05). Adding a severe atrophy index into the baseline model obviously enhanced its discriminatory ability in predicting the outcome by obviously increasing areas under the receiver operating characteristic curve, net reclassification improvement algorithm, and integrated discrimination improvement algorithm values (all P < 0.05). Conclusion: Severe brain atrophy did not improve in-hospital or overall mortality but impaired the long-term recovery after EVT. This objective and automated marker has the potential to be incorporated into decision-support methods for treating ABAO.
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Affiliation(s)
- Chang Liu
- Department of Neurology, Xinqiao Hospital and The Second Affiliated Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Hansheng Liu
- Department of Neurology, Xinqiao Hospital and The Second Affiliated Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Deping Wu
- Department of Neurology, Xinqiao Hospital and The Second Affiliated Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Zhiming Zhou
- Department of Neurology, Yijishan Hospital of Wannan Medical College, Wuhu, China
| | - WenGuo Huang
- Department of Neurology, Chinese Medical Hospital of Maoming, Maoming, China
| | - Zhilin Wu
- Department of Neurology, Yunfu People's Hospital, Yunfu, China
| | - Wenjie Zi
- Department of Neurology, Xinqiao Hospital and The Second Affiliated Hospital, Army Medical University (Third Military Medical University), Chongqing, China
| | - Qingwu Yang
- Department of Neurology, Xinqiao Hospital and The Second Affiliated Hospital, Army Medical University (Third Military Medical University), Chongqing, China
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23
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Protective Role of Glutathione in the Hippocampus after Brain Ischemia. Int J Mol Sci 2021; 22:ijms22157765. [PMID: 34360532 PMCID: PMC8345998 DOI: 10.3390/ijms22157765] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 07/16/2021] [Accepted: 07/19/2021] [Indexed: 11/16/2022] Open
Abstract
Stroke is a major cause of death worldwide, leading to serious disability. Post-ischemic injury, especially in the cerebral ischemia-prone hippocampus, is a serious problem, as it contributes to vascular dementia. Many studies have shown that in the hippocampus, ischemia/reperfusion induces neuronal death through oxidative stress and neuronal zinc (Zn2+) dyshomeostasis. Glutathione (GSH) plays an important role in protecting neurons against oxidative stress as a major intracellular antioxidant. In addition, the thiol group of GSH can function as a principal Zn2+ chelator for the maintenance of Zn2+ homeostasis in neurons. These lines of evidence suggest that neuronal GSH levels could be a key factor in post-stroke neuronal survival. In neurons, excitatory amino acid carrier 1 (EAAC1) is involved in the influx of cysteine, and intracellular cysteine is the rate-limiting substrate for the synthesis of GSH. Recently, several studies have indicated that cysteine uptake through EAAC1 suppresses ischemia-induced neuronal death via the promotion of hippocampal GSH synthesis in ischemic animal models. In this article, we aimed to review and describe the role of GSH in hippocampal neuroprotection after ischemia/reperfusion, focusing on EAAC1.
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24
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Khlif MS, Bird LJ, Restrepo C, Khan W, Werden E, Egorova‐Brumley N, Brodtmann A. Hippocampal subfield volumes are associated with verbal memory after first-ever ischemic stroke. ALZHEIMER'S & DEMENTIA (AMSTERDAM, NETHERLANDS) 2021; 13:e12195. [PMID: 34136634 PMCID: PMC8197170 DOI: 10.1002/dad2.12195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 04/13/2021] [Accepted: 04/15/2021] [Indexed: 12/17/2022]
Abstract
INTRODUCTION Hippocampal subfield volumes are more closely associated with cognitive impairment than whole hippocampal volume in many diseases. Both memory and whole hippocampal volume decline after stroke. Understanding the subfields' temporal evolution could reveal valuable information about post-stroke memory. METHODS We sampled 120 participants (38 control, 82 stroke), with cognitive testing and 3T-MRI available at 3 months and 3 years, from the Cognition and Neocortical Volume after Stroke (CANVAS) study. Verbal memory was assessed using the Hopkins Verbal Learning Test-Revised. Subfields were delineated using FreeSurfer. We used partial Pearson's correlation to assess the associations between subfield volumes and verbal memory scores, adjusting for years of education, sex, and stroke side. RESULTS The left cornu ammonis areas 2/3 and hippocampal tail volumes were significantly associated with verbal memory 3-month post-stroke. At 3 years, the associations became stronger and involved more subfields. DISCUSSION Hippocampal subfield volumes may be a useful biomarker for post-stroke cognitive impairment.
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Affiliation(s)
- Mohamed Salah Khlif
- The Florey Institute of Neuroscience and Mental HealthUniversity of MelbourneParkvilleVictoriaAustralia
| | - Laura J. Bird
- The Florey Institute of Neuroscience and Mental HealthUniversity of MelbourneParkvilleVictoriaAustralia
| | - Carolina Restrepo
- The Florey Institute of Neuroscience and Mental HealthUniversity of MelbourneParkvilleVictoriaAustralia
| | - Wasim Khan
- Department of NeuroscienceCentral Clinical SchoolMonash UniversityClaytonVictoriaAustralia
- Department of Neuroimaging Institute of PsychiatryPsychology, and Neuroscience (IoPPN), King's College LondonLondonUK
| | - Emilio Werden
- The Florey Institute of Neuroscience and Mental HealthUniversity of MelbourneParkvilleVictoriaAustralia
| | - Natalia Egorova‐Brumley
- The Florey Institute of Neuroscience and Mental HealthUniversity of MelbourneParkvilleVictoriaAustralia
- Melbourne School of Psychological SciencesUniversity of MelbourneParkvilleVictoriaAustralia
| | - Amy Brodtmann
- The Florey Institute of Neuroscience and Mental HealthUniversity of MelbourneParkvilleVictoriaAustralia
- Department of NeurologyAustin HealthHeidelbergVictoriaAustralia
- Eastern Cognitive Disorders ClinicBox Hill HospitalMonash UniversityBox HillVictoriaAustralia
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25
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Brait VH, Wright DK, Nategh M, Oman A, Syeda WT, Ermine CM, O'Brien KR, Werden E, Churilov L, Johnston LA, Thompson LH, Nithianantharajah J, Jackman KA, Brodtmann A. Longitudinal hippocampal volumetric changes in mice following brain infarction. Sci Rep 2021; 11:10269. [PMID: 33986303 PMCID: PMC8119705 DOI: 10.1038/s41598-021-88284-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Accepted: 04/05/2021] [Indexed: 01/14/2023] Open
Abstract
Hippocampal atrophy is increasingly described in many neurodegenerative syndromes in humans, including stroke and vascular cognitive impairment. However, the progression of brain volume changes after stroke in rodent models is poorly characterized. We aimed to monitor hippocampal atrophy occurring in mice up to 48-weeks post-stroke. Male C57BL/6J mice were subjected to an intraluminal filament-induced middle cerebral artery occlusion (MCAO). At baseline, 3-days, and 1-, 4-, 12-, 24-, 36- and 48-weeks post-surgery, we measured sensorimotor behavior and hippocampal volumes from T2-weighted MRI scans. Hippocampal volume-both ipsilateral and contralateral-increased over the life-span of sham-operated mice. In MCAO-subjected mice, different trajectories of ipsilateral hippocampal volume change were observed dependent on whether the hippocampus contained direct infarction, with a decrease in directly infarcted tissue and an increase in non-infarcted tissue. To further investigate these volume changes, neuronal and glial cell densities were assessed in histological brain sections from the subset of MCAO mice lacking hippocampal infarction. Our findings demonstrate previously uncharacterized changes in hippocampal volume and potentially brain parenchymal cell density up to 48-weeks in both sham- and MCAO-operated mice.
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Affiliation(s)
- Vanessa H Brait
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia.
| | - David K Wright
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia.,The Department of Neuroscience, Central Clinical School, Monash University, Melbourne, VIC, Australia
| | - Mohsen Nategh
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Alexander Oman
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Warda T Syeda
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Charlotte M Ermine
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Katrina R O'Brien
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Emilio Werden
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Leonid Churilov
- Melbourne Medical School, University of Melbourne, Parkville, VIC, Australia
| | - Leigh A Johnston
- Department of Biomedical Engineering, University of Melbourne, Parkville, VIC, Australia.,Melbourne Brain Centre Imaging Unit, University of Melbourne, Parkville, VIC, Australia
| | - Lachlan H Thompson
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Jess Nithianantharajah
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Katherine A Jackman
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia
| | - Amy Brodtmann
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia.
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26
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Mouthon AL, Meyer-Heim A, Huber R, Van Hedel HJA. Neural correlates of memory recovery: Preliminary findings in children and adolescents with acquired brain injury. Restor Neurol Neurosci 2021; 39:61-71. [PMID: 33579882 PMCID: PMC7990412 DOI: 10.3233/rnn-201140] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background: After acquired brain injury (ABI), patients show various neurological impairments and outcome is difficult to predict. Identifying biomarkers of recovery could provide prognostic information about a patient’s neural potential for recovery and improve our understanding of neural reorganization. In healthy subjects, sleep slow wave activity (SWA, EEG spectral power 1–4.5 Hz) has been linked to neuroplastic processes such as learning and brain maturation. Therefore, we suggest that SWA might be a suitable measure to investigate neural reorganization underlying memory recovery. Objectives: In the present study, we used SWA to investigate neural correlates of recovery of function in ten paediatric patients with ABI (age range 7–15 years). Methods: We recorded high-density EEG (128 electrodes) during sleep at the beginning and end of rehabilitation. We used sleep EEG data of 52 typically developing children to calculate age-normalized values for individual patients. In patients, we also assessed every-day life memory impairment at the beginning and end of rehabilitation. Results: In the course of rehabilitation, memory recovery was paralleled by longitudinal changes in SWA over posterior parietal brain areas. SWA over left prefrontal and occipital brain areas at the beginning of rehabilitation predicted memory recovery. Conclusions: We show that longitudinal sleep-EEG measurements are feasible in the clinical setting. While posterior parietal and prefrontal brain areas are known to belong to the memory “core network”, occipital brain areas have never been related to memory. While we have to remain cautious in interpreting preliminary findings, we suggest that SWA is a promising measure to investigate neural reorganization.
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Affiliation(s)
- Anne-Laure Mouthon
- Swiss Children's Rehab - Research Department and Children's Research Centre, University Children's Hospital Zurich, University of Zurich, Switzerland
| | - Andreas Meyer-Heim
- Swiss Children's Rehab - Research Department and Children's Research Centre, University Children's Hospital Zurich, University of Zurich, Switzerland
| | - Reto Huber
- Child Development Centre and Children's Research Centre, University Children's Hospital Zurich, University of Zurich, Switzerland.,Department of Child and Adolescent Psychiatry and Psychotherapy, Psychiatric Hospital, University of Zurich, Switzerland
| | - Hubertus J A Van Hedel
- Swiss Children's Rehab - Research Department and Children's Research Centre, University Children's Hospital Zurich, University of Zurich, Switzerland
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Codd LN, Blackmore DG, Vukovic J, Bartlett PF. Exercise reverses learning deficits induced by hippocampal injury by promoting neurogenesis. Sci Rep 2020; 10:19269. [PMID: 33159114 PMCID: PMC7648755 DOI: 10.1038/s41598-020-76176-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Accepted: 10/05/2020] [Indexed: 12/18/2022] Open
Abstract
Hippocampal atrophy and cognitive decline are common sequelae of many neurodegenerative disorders, including stroke. To determine whether cognitive decline can be ameliorated by exercise-induced neurogenesis, C57BL/6 mice in which a unilateral hippocampal injury had been induced by injecting the vasoconstrictor endothelin-1 into their right hippocampus, were run voluntarily for 21 days on a running-wheel. We found the severe deficits in spatial learning, as detected by active place-avoidance task, following injury were almost completely restored in animals that ran whereas those that did not run showed no improvement. We show the increase in neurogenesis found in both the injured and contralateral hippocampi following running was responsible for the restoration of learning since bilateral ablation of newborn doublecortin (DCX)-positive neurons abrogated the cognitive improvement, whereas unilateral ablations of DCX-positive neurons did not prevent recovery, demonstrating that elevated neurogenesis in either the damaged or intact hippocampus is sufficient to reverse hippocampal injury-induced deficits.
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Affiliation(s)
- Lavinia N Codd
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Daniel G Blackmore
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Jana Vukovic
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, 4072, Australia.,School of Biomedical Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Perry F Bartlett
- Queensland Brain Institute, The University of Queensland, Brisbane, QLD, 4072, Australia.
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Low-Level Inhibition of GABAergic Synapses Enhances Gene Expressions Crucial for Neuronal Plasticity in the Hippocampus After Ischemic Stroke. J Stroke Cerebrovasc Dis 2020; 29:105316. [PMID: 32992173 DOI: 10.1016/j.jstrokecerebrovasdis.2020.105316] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/31/2020] [Accepted: 09/07/2020] [Indexed: 01/09/2023] Open
Abstract
OBJECTIVE Pharmacological inhibition of GABAergic synapses could represent a potent neuromodulation strategy to activate hippocampal neurons and increase neurotrophic factor gene expression, thus exerting a beneficial effect on post-stroke cognitive impairment (PSCI). The objective of this study was to assess the effects of low-level inhibition of GABAergic synapses on hippocampal gene expressions related to neuroplasticity using the middle cerebral artery occlusion surgery (MCAO) ischemic stroke rat model. METHODS The animals were randomly assigned to three experimental groups-(1) a sham operated group (SHAM), (2) a control group (CON), and (3) a bicuculline group (BIC). MCAO was performed in the CON and BIC groups. A non-epileptic dose of bicuculline (0.25 mg/kg) was intraperitoneally administered every day for two weeks, starting three days after surgery, to the rats in the BIC group. The mRNA expression of brain-derived neurotrophic factor (BDNF), tropomyosin-related kinase B (TrkB), in relation to neurotrophic intracellular signal, p75, in relation to apoptosis, and synaptophysin (SYP) and PSD-95, synaptic markers, were assessed in the hippocampus ipsilateral to the ischemic site. RESULTS MCAO increased the gene expression of TrkB. Furthermore, MCAO plus bicuculline administration increased the expression ratio of TrkB to p75 and SYP gene expression. CONCLUSION Therefore, this study showed that administration of bicuculline after stroke beneficially modulated the expression of crucial genes for neuroplasticity, including BDNF receptors and SYP, in the ipsilateral hippocampus, suggesting that low-level inhibition of GABAergic synapses could lead to beneficial neuromodulation in the hippocampus after stroke.
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Egorova N, Liem F, Hachinski V, Brodtmann A. Predicted Brain Age After Stroke. Front Aging Neurosci 2019; 11:348. [PMID: 31920628 PMCID: PMC6914736 DOI: 10.3389/fnagi.2019.00348] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2019] [Accepted: 11/28/2019] [Indexed: 11/13/2022] Open
Abstract
Aging is a known non-modifiable risk factor for stroke. Usually, this refers to chronological rather than biological age. Biological brain age can be estimated based on cortical and subcortical brain measures. For stroke patients, it could serve as a more sensitive marker of brain health than chronological age. In this study, we investigated whether there is a difference in brain age between stroke survivors and control participants matched on chronological age. We estimated brain age at 3 months after stroke, and then followed the longitudinal trajectory over three time-points: within 6 weeks (baseline), at 3 and at 12 months following their clinical event. We found that brain age in stroke participants was higher compared to controls, with the mean difference between the groups varying between 3.9 and 8.7 years depending on the brain measure used for prediction. This difference in brain age was observed at 6 weeks after stroke and maintained at 3 and 12 months after stroke. The presence of group differences already at baseline suggests that stroke might be an ultimate manifestation of gradual cerebrovascular burden accumulation and brain degeneration. Brain age prediction, therefore, has the potential to be a useful biomarker for quantifying stroke risk.
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Affiliation(s)
- Natalia Egorova
- Division of Behavioural Neuroscience, The Florey Institute of Neuroscience and Mental Health, Melbourne, VIC, Australia.,Melbourne School of Psychological Sciences, University of Melbourne, Melbourne, VIC, Australia
| | - Franziskus Liem
- University Research Priority Program Dynamics of Healthy Aging, University of Zurich, Zurich, Switzerland
| | - Vladimir Hachinski
- Department of Clinical Neurological Sciences, Western University, London, ON, Canada.,Department of Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada
| | - Amy Brodtmann
- Division of Behavioural Neuroscience, The Florey Institute of Neuroscience and Mental Health, Melbourne, VIC, Australia
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Does aneurysm side influence the infarction side and patients´ outcome after subarachnoid hemorrhage? PLoS One 2019; 14:e0224013. [PMID: 31697715 PMCID: PMC6837438 DOI: 10.1371/journal.pone.0224013] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2018] [Accepted: 10/03/2019] [Indexed: 11/30/2022] Open
Abstract
Background The prognostic factors and outcome of aneurysms appear to be dependent on its locations. Therefore, we compared left- and right- sided aneurysms in patients with aneurysmal subarachnoid hemorrhage (SAH) in terms of differences in outcome and prognostic factors. Methods Patients with SAH were entered into a prospectively collected database. A total of 509 patients with aneurysmal subarachnoid hemorrhage were retrospectively selected and stratified in two groups depending on side of ruptured aneurysm (right n = 284 vs. left n = 225). Midline aneurysms of the basilar and anterior communicating arteries were excluded from the analysis. Outcomes were assessed using the modified Rankin Scale (mRS; favorable (mRS 0–2) vs. unfavorable (mRS 3–6)) six months after SAH. Results We did not identify any differences in outcome depending on left- and right-sided ruptured aneurysms. In both groups, the significant negative predictive factors included clinical admission status (WFNS IV+V), Fisher 3- bleeding pattern in CT, the occurrence of delayed cerebral ischemia (DCI), early hydrocephalus and later shunt-dependence. The side of the ruptured aneurysm does not seem to influence patients´ outcome. Interestingly, the aneurysm side predicts the side of infarction, with a significant influence on patients´ outcome in case of left-sided infarctions. In addition, the in multivariate analysis side of aneurysm was an independent predictor for the side of cerebral infarctions. Conclusion The side of the ruptured aneurysms (right or left) did not influence patients’ outcome. However, the aneurysm-side predicts the side of delayed infarctions and outcome appear to be worse in patients with left-sided infarctions.
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31
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Amini-Khoei H, Saghaei E, Mobini GR, Sabzevary-Ghahfarokhi M, Ahmadi R, Bagheri N, Mokhtari T. Possible involvement of PI3K/AKT/mTOR signaling pathway in the protective effect of selegiline (deprenyl) against memory impairment following ischemia reperfusion in rat. Neuropeptides 2019; 77:101942. [PMID: 31272684 DOI: 10.1016/j.npep.2019.101942] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2019] [Revised: 06/17/2019] [Accepted: 06/26/2019] [Indexed: 02/08/2023]
Abstract
Short-term cerebral ischemia led to memory dysfunction. There is a pressing need to introduce effective agents to reduce complications of the ischemia. Involvement of PI3K/AKT/mTOR signaling pathway has been determined in the neuroprotective effect of various agents. Selegiline (deprenyl) possessed neuroprotective properties. In this study global ischemia/reperfusion was established in rats. Selegiline (5 mg/kg for 7 consecutive days) administrated via intraperitoneal route. Possible involvement of PI3K/AKT/mTOR signaling pathway was evaluated using qRT-PCR, immunohistochemistry and histophatologic evaluations in the hippocampus. Spatial memory was evaluated by morris water maze (MWM). Results showed that ischemia impaired the memory and ischemic rats spent more time to find hidden platform in the MWM. Ischemia significantly decreased levels of PI3K, AKT and mTOR in the hippocampus. Histopathologic assessment revealed that the percent of dark neurons significantly increased in the CA1 area of the hippocampus of ischemic rats. Selegiline improved the memory as ischemic rats spent fewer time to find hidden platform in the MWM. Findings showed that selegiline increased the level and expression of PI3K, AKT and mTOR as well as decreased the proportion of dark neurons in the CA1 area of the pyramidal layer of the hippocampus. We concluded that selegiline, partially at least, through increases the expression of PI3K, AKT and mTOR as well as decreases the percent of dark neurons in the hippocampus could improve the memory impairment following the ischemia in rats.
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Affiliation(s)
- Hossein Amini-Khoei
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran.
| | - Elham Saghaei
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Gholam-Reza Mobini
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Milad Sabzevary-Ghahfarokhi
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Reza Ahmadi
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Nader Bagheri
- Medical Plants Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Tahmineh Mokhtari
- Nervous System Stem Cells Research Center, Semnan University of Medical Sciences, Semnan, Iran; Department of Anatomy, School of Medicine, Semnan University of Medical Sciences, Semnan, Iran
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32
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Eldahshan W, Fagan SC, Ergul A. Inflammation within the neurovascular unit: Focus on microglia for stroke injury and recovery. Pharmacol Res 2019; 147:104349. [PMID: 31315064 PMCID: PMC6954670 DOI: 10.1016/j.phrs.2019.104349] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Revised: 06/20/2019] [Accepted: 07/10/2019] [Indexed: 12/11/2022]
Abstract
Neuroinflammation underlies the etiology of multiple neurodegenerative diseases and stroke. Our understanding of neuroinflammation has evolved in the last few years and major players have been identified. Microglia, the brain resident macrophages, are considered sentinels at the forefront of the neuroinflammatory response to different brain insults. Interestingly, microglia perform other physiological functions in addition to their role in neuroinflammation. Therefore, an updated approach in which modulation, rather than complete elimination of microglia is necessary. In this review, the emerging roles of microglia and their interaction with different components of the neurovascular unit are discussed. In addition, recent data on sex differences in microglial physiology and in the context of stroke will be presented. Finally, the multiplicity of roles assumed by microglia in the pathophysiology of ischemic stroke, and in the presence of co-morbidities such as hypertension and diabetes are summarized.
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Affiliation(s)
- Wael Eldahshan
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, United States; Charlie Norwood VA Medical Center Augusta, GA, United States
| | - Susan C Fagan
- Program in Clinical and Experimental Therapeutics, University of Georgia College of Pharmacy, United States; Charlie Norwood VA Medical Center Augusta, GA, United States
| | - Adviye Ergul
- Ralph Johnson VA Medical Center, Medical University of South Carolina, Charleston, SC, United States; Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC, United States.
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Liu G, Tan X, Dang C, Tan S, Xing S, Huang N, Peng K, Xie C, Tang X, Zeng J. Regional Shape Abnormalities in Thalamus and Verbal Memory Impairment After Subcortical Infarction. Neurorehabil Neural Repair 2019; 33:476-485. [PMID: 31081462 DOI: 10.1177/1545968319846121] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Background. Subcortical infarcts can result in verbal memory impairment, but the potential underlying mechanisms remain unknown. Objective. We investigated the spatiotemporal deterioration patterns of brain structures in patients with subcortical infarction and identified the regions that contributed to verbal memory impairment. Methods. Cognitive assessment and structural magnetic resonance imaging were performed 1, 4, and 12 weeks after stroke onset in 28 left-hemisphere and 22 right-hemisphere stroke patients with subcortical infarction. Whole-brain volumetric analysis combined with a further-refined shape analysis was conducted to analyze longitudinal morphometric changes in brain structures and their relationship to verbal memory performance. Results. Between weeks 1 and 12, significant volume decreases in the ipsilesional basal ganglia, inferior white matter, and thalamus were found in the left-hemisphere stroke group. Among those 3 structures, only the change rate of the thalamus volume was significantly correlated with that in immediate recall. For the right-hemisphere stroke group, only the ipsilesional basal ganglia survived the week 1 to week 12 group comparison, but its change rate was not significantly correlated with the verbal memory change rate. Shape analysis of the thalamus revealed atrophies of the ipsilesional thalamic subregions connected to the prefrontal, temporal, and premotor cortices in the left-hemisphere stroke group and positive correlations between the rates of those atrophies and the change rate in immediate recall. Conclusions. Secondary damage to the thalamus, especially to the left subregions connected to specific cortices, may be associated with early verbal memory impairment following an acute subcortical infarct.
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Affiliation(s)
- Gang Liu
- 1 The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Xiaoqing Tan
- 2 Southern University of Science and Technology, Shenzhen, Guangdong, China.,3 Graduate School of Public Health, University of Pittsburgh, Pittsburgh, PA, USA
| | - Chao Dang
- 1 The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Shuangquan Tan
- 1 The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Shihui Xing
- 1 The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
| | - Nianwei Huang
- 2 Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Kangqiang Peng
- 4 Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong, China
| | - Chuanmiao Xie
- 4 Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong, China
| | - Xiaoying Tang
- 2 Southern University of Science and Technology, Shenzhen, Guangdong, China
| | - Jinsheng Zeng
- 1 The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, China
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Haque ME, Gabr RE, Hasan KM, George S, Arevalo OD, Zha A, Alderman S, Jeevarajan J, Mas MF, Zhang X, Satani N, Friedman ER, Sitton CW, Savitz S. Ongoing Secondary Degeneration of the Limbic System in Patients With Ischemic Stroke: A Longitudinal MRI Study. Front Neurol 2019; 10:154. [PMID: 30890995 PMCID: PMC6411642 DOI: 10.3389/fneur.2019.00154] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Accepted: 02/06/2019] [Indexed: 01/08/2023] Open
Abstract
Purpose: Ongoing post-stroke structural degeneration and neuronal loss preceding neuropsychological symptoms such as cognitive decline and depression are poorly understood. Various substructures of the limbic system have been linked to cognitive impairment. In this longitudinal study, we investigated the post-stroke macro- and micro-structural integrity of the limbic system using structural and diffusion tensor magnetic resonance imaging. Materials and Methods: Nineteen ischemic stroke patients (11 men, 8 women, average age 53.4 ± 12.3, range 18–75 years), with lesions remote from the limbic system, were serially imaged three times over 1 year. Structural and diffusion-tensor images (DTI) were obtained on a 3.0 T MRI system. The cortical thickness, subcortical volume, mean diffusivity (MD), and fractional anisotropy (FA) were measured in eight different regions of the limbic system. The National Institutes of Health Stroke Scale (NIHSS) was used for clinical assessment. A mixed model for multiple factors was used for statistical analysis, and p-values <0.05 was considered significant. Results: All patients demonstrated improved NIHSS values over time. The ipsilesional subcortical volumes of the thalamus, hippocampus, and amygdala significantly decreased (p < 0.05) and MD significantly increased (p < 0.05). The ipsilesional cortical thickness of the entorhinal and perirhinal cortices was significantly smaller than the contralesional hemisphere at 12 months (p < 0.05). The cortical thickness of the cingulate gyrus at 12 months was significantly decreased at the caudal and isthmus regions as compared to the 1 month assessment (p < 0.05). The cingulum fibers had elevated MD at the ipsilesional caudal-anterior and posterior regions compared to the corresponding contralesional regions. Conclusion: Despite the decreasing NIHSS scores, we found ongoing unilateral neuronal loss/secondary degeneration in the limbic system, irrespective of the lesion location. These results suggest a possible anatomical basis for post stroke psychiatric complications.
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Affiliation(s)
- Muhammad E Haque
- Institute for Stroke and Cerebrovascular Diseases, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Refaat E Gabr
- Diagnostic and Interventional Imaging, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Khader M Hasan
- Diagnostic and Interventional Imaging, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Sarah George
- Institute for Stroke and Cerebrovascular Diseases, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Octavio D Arevalo
- Diagnostic and Interventional Imaging, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Alicia Zha
- Institute for Stroke and Cerebrovascular Diseases, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Susan Alderman
- Institute for Stroke and Cerebrovascular Diseases, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Jerome Jeevarajan
- Institute for Stroke and Cerebrovascular Diseases, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Manual F Mas
- TIRR Memorial Hermann Rehabilitation and Research, Houston, TX, United States
| | - Xu Zhang
- Biostatistics/Epidemiology/Research Design Component, Center for Clinical and Translational Sciences, McGovern Medical School at University of Texas Health Science Center at Houston (UTHealth), Houston, TX, United States
| | - Nikunj Satani
- Institute for Stroke and Cerebrovascular Diseases, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Elliott R Friedman
- Diagnostic and Interventional Imaging, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Clark W Sitton
- Diagnostic and Interventional Imaging, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Sean Savitz
- Institute for Stroke and Cerebrovascular Diseases, University of Texas Health Science Center at Houston, Houston, TX, United States
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35
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Ueba Y, Aratake T, Onodera KI, Higashi Y, Hamada T, Shimizu T, Shimizu S, Yawata T, Nakamura R, Akizawa T, Ueba T, Saito M. Attenuation of zinc-enhanced inflammatory M1 phenotype of microglia by peridinin protects against short-term spatial-memory impairment following cerebral ischemia in mice. Biochem Biophys Res Commun 2018; 507:476-483. [DOI: 10.1016/j.bbrc.2018.11.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Accepted: 11/12/2018] [Indexed: 01/04/2023]
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36
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Functional Neurochemistry of the Ventral and Dorsal Hippocampus: Stress, Depression, Dementia and Remote Hippocampal Damage. Neurochem Res 2018; 44:1306-1322. [PMID: 30357653 DOI: 10.1007/s11064-018-2662-0] [Citation(s) in RCA: 80] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 09/15/2018] [Accepted: 10/15/2018] [Indexed: 12/15/2022]
Abstract
The hippocampus is not a homogeneous brain area, and the complex organization of this structure underlies its relevance and functional pleiotropism. The new data related to the involvement of the ventral hippocampus in the cognitive function, behavior, stress response and its association with brain pathology, in particular, depression, are analyzed with a focus on neuroplasticity, specializations of the intrinsic neuronal network, corticosteroid signaling through mineralocorticoid and glucocorticoid receptors and neuroinflammation in the hippocampus. The data on the septo-temporal hippicampal gradient are analyzed with particular emphasis on the ventral hippocampus, a region where most important alteration underlying depressive disorders occur. According to the recent data, the existing simple paradigm "learning (dorsal hippocampus) versus emotions (ventral hippocampus)" should be substantially revised and specified. A new hypothesis is suggested on the principal involvement of stress response mechanisms (including interaction of released glucocorticoids with hippocampal receptors and subsequent inflammatory events) in the remote hippocampal damage underlying delayed dementia and depression induced by focal brain damage (e.g. post-stroke and post-traumatic). The translational validity of this hypothesis comprising new approaches in preventing post-stroke and post-trauma depression and dementia can be confirmed in experimental and clinical studies.
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37
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The Relationship between Cerebral White Matter Integrity and Cognitive Function in Mild Stroke with Basal Ganglia Region Infarcts. Sci Rep 2018; 8:8422. [PMID: 29849078 PMCID: PMC5976674 DOI: 10.1038/s41598-018-26316-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Accepted: 04/04/2018] [Indexed: 12/11/2022] Open
Abstract
Mild stroke is a known risk factor for dementia. The relationship between cerebral white matter (WM) integrity and cognitive impairment (CI) in mild stroke patients with basal ganglia region infarcts is unknown. Total of 33 stroke patients and 19 age-matched controls underwent diffusion tensor imaging scans and a formal neuropsychological test battery. CI was defined as having a performance score 1.5 SD below the established norm. We compared the differences in Z-scores and Fraction Anisotropy (FA) values among controls, stroke with no CI (NCI) and stroke with CI groups. Multiple linear regressions were performed between FA values in affected regions and neuropsychological tests in stroke patients. The majority of stroke patients were in their 50s (56.90 ± 9.23 years). CI patients exhibited a significantly decreased Z score in visual delayed memory and remarkably decreased FA values in the right external capsule and right fornix (FWE-corrected) compared with NCI patients and controls. In stroke patients, the FA value in the right fornix was positively correlated with delayed visual memory. Mild stroke with basal ganglia region infarcts may be related to widespread abnormality of WM integrity. The lower WM integrity in the right fornix may be a marker of impaired delayed visual memory.
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Diao Q, Liu J, Wang C, Cheng J, Han T, Zhang X. Regional structural impairments outside lesions are associated with verbal short-term memory deficits in chronic subcortical stroke. Oncotarget 2018; 8:30900-30907. [PMID: 28427203 PMCID: PMC5458176 DOI: 10.18632/oncotarget.15882] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Accepted: 02/21/2017] [Indexed: 11/25/2022] Open
Abstract
Background and Purpose We aimed to explore the neural mechanisms of verbal short-term memory (VSTM) impairment in subcortical stroke by evaluating the contributions of lesion and remote grey matter volume (GMV) reduction. Results There was no significant correlation between lesions and VSTM. In stroke patients with left lesions, GMV reductions in the right middle frontal gyrus and in the left inferior frontal gyrus were positively correlated with VSTM impairment. In patients with right lesions, GMV reduction in the right dorsal posterior cingulate cortex was positively correlated with VSTM impairment. Materials and Methods Ninety-seven patients with chronic subcortical ischemic stroke and seventy-nine healthy controls underwent VSTM and structural MRI examinations. Voxel-based lesion symptom mapping was used to identify correlations between lesions and VSTM. Voxel-wise comparisons were used to identify brain regions with significant GMV reduction in patients with left and right lesions. These regions were used in correlation analyses between GMV and VSTM in each patient subgroup. Conclusions These findings suggest that VSTM impairment in subcortical stroke is associated with secondary regional structural damage in non-lesion regions, rather than with the lesion itself. Moreover, different neural substrates may underlie VSTM impairment in stroke patients with left and right lesions.
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Affiliation(s)
- Qingqing Diao
- Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Jingchun Liu
- Department of Radiology and Tianjin Key Laboratory of Functional Imaging, Tianjin Medical University General Hospital, Tianjin 300052, China
| | - Caihong Wang
- Department of Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, China
| | - Jingliang Cheng
- Department of Radiology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, 450052, China
| | - Tong Han
- Department of Radiology, Tianjin Huanhu Hospital, Tianjin 300350, China
| | - Xuejun Zhang
- School of Medical Imaging, Tianjin Medical University, Tianjin 300070, China
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Dundon NM, Katshu MZUH, Harry B, Roberts D, Leek EC, Downing P, Sapir A, Roberts C, d’Avossa G. Human Parahippocampal Cortex Supports Spatial Binding in Visual Working Memory. Cereb Cortex 2017; 28:3589-3599. [DOI: 10.1093/cercor/bhx231] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Indexed: 01/19/2023] Open
Affiliation(s)
- Neil Michael Dundon
- School of Psychology, Bangor University, Bangor, UK
- Department of Child and Adolescent Psychiatry, Psychotherapy and Psychosomatics, University of Freiburg, Freiburg, Germany
| | - Mohammad Zia Ul Haq Katshu
- Faculty of Medicine and Health Sciences, Division of Psychiatry and Applied Psychology, University of Nottingham, Nottingham, UK
| | - Bronson Harry
- Bankstown Campus, The MARCS Institute for Brain, Behaviour and Development, Western Sydney University, Penrith, NSW, Australia
| | - Daniel Roberts
- Faculty of Science, School of Natural Sciences and Psychology, Liverpool John Moores University, Liverpool, UK
| | - E Charles Leek
- School of Psychology, Bangor University, Bangor, UK
- Laboratoire de Psychologie et NeuroCognition (LPNC), Universite Grenoble Alpes, Grenoble, France
| | - Paul Downing
- School of Psychology, Bangor University, Bangor, UK
| | - Ayelet Sapir
- School of Psychology, Bangor University, Bangor, UK
| | - Craig Roberts
- Betsi Cadwaladr University Health Board, North Wales Brain Injury Service, Colwyn Bay, Conwy, UK
| | - Giovanni d’Avossa
- School of Psychology, Bangor University, Bangor, UK
- Betsi Cadwaladr University Health Board, North Wales Brain Injury Service, Colwyn Bay, Conwy, UK
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Werden E, Cumming T, Li Q, Bird L, Veldsman M, Pardoe HR, Jackson G, Donnan GA, Brodtmann A. Structural MRI markers of brain aging early after ischemic stroke. Neurology 2017; 89:116-124. [PMID: 28600458 PMCID: PMC5501937 DOI: 10.1212/wnl.0000000000004086] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 03/16/2017] [Indexed: 01/29/2023] Open
Abstract
Objective: To examine associations between ischemic stroke, vascular risk factors, and MRI markers of brain aging. Methods: Eighty-one patients (mean age 67.5 ± 13.1 years, 31 left-sided, 61 men) with confirmed first-ever (n = 66) or recurrent (n = 15) ischemic stroke underwent 3T MRI scanning within 6 weeks of symptom onset (mean 26 ± 9 days). Age-matched controls (n = 40) completed identical testing. Multivariate regression analyses examined associations between group membership and MRI markers of brain aging (cortical thickness, total brain volume, white matter hyperintensity [WMH] volume, hippocampal volume), normalized against intracranial volume, and the effects of vascular risk factors on these relationships. Results: First-ever stroke was associated with smaller hippocampal volume (p = 0.025) and greater WMH volume (p = 0.004) relative to controls. Recurrent stroke was in turn associated with smaller hippocampal volume relative to both first-ever stroke (p = 0.017) and controls (p = 0.001). These associations remained significant after adjustment for age, sex, education, and, in stroke patients, infarct volume. Total brain volume was not significantly smaller in first-ever stroke patients than in controls (p = 0.056), but the association became significant after further adjustment for atrial fibrillation (p = 0.036). Cortical thickness and brain volumes did not differ as a function of stroke type, infarct volume, or etiology. Conclusions: Brain structure is likely to be compromised before ischemic stroke by vascular risk factors. Smaller hippocampal and total brain volumes and increased WMH load represent proxies for underlying vascular brain injury.
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Affiliation(s)
- Emilio Werden
- From the Florey Institute of Neuroscience and Mental Health (E.W., T.C., Q.L., L.B., M.V., H.R.P., G.J., G.A.D., A.B.), University of Melbourne; Austin Health (G.J., A.B.), Heidelberg; and Eastern Clinical Research Unit (A.B.), Monash University, Box Hill Hospital, Melbourne, Victoria, Australia
| | - Toby Cumming
- From the Florey Institute of Neuroscience and Mental Health (E.W., T.C., Q.L., L.B., M.V., H.R.P., G.J., G.A.D., A.B.), University of Melbourne; Austin Health (G.J., A.B.), Heidelberg; and Eastern Clinical Research Unit (A.B.), Monash University, Box Hill Hospital, Melbourne, Victoria, Australia
| | - Qi Li
- From the Florey Institute of Neuroscience and Mental Health (E.W., T.C., Q.L., L.B., M.V., H.R.P., G.J., G.A.D., A.B.), University of Melbourne; Austin Health (G.J., A.B.), Heidelberg; and Eastern Clinical Research Unit (A.B.), Monash University, Box Hill Hospital, Melbourne, Victoria, Australia
| | - Laura Bird
- From the Florey Institute of Neuroscience and Mental Health (E.W., T.C., Q.L., L.B., M.V., H.R.P., G.J., G.A.D., A.B.), University of Melbourne; Austin Health (G.J., A.B.), Heidelberg; and Eastern Clinical Research Unit (A.B.), Monash University, Box Hill Hospital, Melbourne, Victoria, Australia
| | - Michele Veldsman
- From the Florey Institute of Neuroscience and Mental Health (E.W., T.C., Q.L., L.B., M.V., H.R.P., G.J., G.A.D., A.B.), University of Melbourne; Austin Health (G.J., A.B.), Heidelberg; and Eastern Clinical Research Unit (A.B.), Monash University, Box Hill Hospital, Melbourne, Victoria, Australia
| | - Heath R Pardoe
- From the Florey Institute of Neuroscience and Mental Health (E.W., T.C., Q.L., L.B., M.V., H.R.P., G.J., G.A.D., A.B.), University of Melbourne; Austin Health (G.J., A.B.), Heidelberg; and Eastern Clinical Research Unit (A.B.), Monash University, Box Hill Hospital, Melbourne, Victoria, Australia
| | - Graeme Jackson
- From the Florey Institute of Neuroscience and Mental Health (E.W., T.C., Q.L., L.B., M.V., H.R.P., G.J., G.A.D., A.B.), University of Melbourne; Austin Health (G.J., A.B.), Heidelberg; and Eastern Clinical Research Unit (A.B.), Monash University, Box Hill Hospital, Melbourne, Victoria, Australia
| | - Geoffrey A Donnan
- From the Florey Institute of Neuroscience and Mental Health (E.W., T.C., Q.L., L.B., M.V., H.R.P., G.J., G.A.D., A.B.), University of Melbourne; Austin Health (G.J., A.B.), Heidelberg; and Eastern Clinical Research Unit (A.B.), Monash University, Box Hill Hospital, Melbourne, Victoria, Australia
| | - Amy Brodtmann
- From the Florey Institute of Neuroscience and Mental Health (E.W., T.C., Q.L., L.B., M.V., H.R.P., G.J., G.A.D., A.B.), University of Melbourne; Austin Health (G.J., A.B.), Heidelberg; and Eastern Clinical Research Unit (A.B.), Monash University, Box Hill Hospital, Melbourne, Victoria, Australia.
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Ihle-Hansen H, Hagberg G, Fure B, Thommessen B, Fagerland MW, Øksengård AR, Engedal K, Selnes P. Association between total-Tau and brain atrophy one year after first-ever stroke. BMC Neurol 2017; 17:107. [PMID: 28583116 PMCID: PMC5460365 DOI: 10.1186/s12883-017-0890-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 05/29/2017] [Indexed: 11/27/2022] Open
Abstract
Background Although the most serious consequence of neuronal ischemia is acute neuronal death, mounting evidence suggests similarities between stroke and neurodegenerative disease. Brain atrophy visualized on structural MRI and pathological cerebrospinal fluid (CSF) concentrations of microtubule-associated protein tau (T-tau) and phosphorylated microtubule-associated protein tau indicate neurofibrillary degeneration. We aimed to explore the association between CSF T-tau and brain atrophy 1 year post-stroke. Methods We included 210 patients with first-ever ischemic stroke or transitory ischemic attack without pre-existing cognitive impairment. After 12 months, subjects underwent MRI, and CSF biomarkers were assessed. Using SIENAX (part of FSL), ventricular CSF volume and total brain volume were estimated and normalized for subject head size. The association between T-tau as explanatory variable and ventricular and total brain volume as outcome variables were studied using linear regression. Results One hundred eighty-two patients completed the follow-up. Forty-four had a lumbar puncture. Of these, 31 had their MRI with identical scan parameters. Mean age was 70.2 years (SD 11.7). Ventricular volume on MRI was significantly associated with age, but not with gender. In the multiple regression model, there was a significant association between T-tau and both ventricular (beta 0.44, 95% CI 376.3, 394.9, p = 0.021) and global brain volume (beta −0.50, 95% CI −565.9, −78.3, p = 0.011). There was no significant association between CSF T-tau 1 year post-stroke and baseline volumes. Conclusion T-tau measured 1 year post-stroke is associated with measures of brain atrophy. The findings indicate that acute stroke may enhance or trigger tau-linked neurodegeneration with loss of neurons. Trial registration Clinicaltrials.gov NCT00506818, July 23, 2007. Inclusion from February 2007, randomization and intervention from May 2007 and trial registration in July 2007.
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Affiliation(s)
- Hege Ihle-Hansen
- Department of Internal medicine, Vestre Viken Hospital Trust, Baerum Hospital, Norway, 3004, Drammen, Norway.
| | - Guri Hagberg
- Department of Internal medicine, Vestre Viken Hospital Trust, Baerum Hospital, Norway, 3004, Drammen, Norway
| | - Brynjar Fure
- Norwegian Knowledge Centre for the Health Services, Oslo, Norway
| | - Bente Thommessen
- Department of Neurology, Akershus University Hospital, Lørenskog, Norway
| | - Morten W Fagerland
- Unit of Biostatistics and Epidemiology, Oslo University Hospital, Oslo, Norway
| | - Anne R Øksengård
- Department of Internal medicine, Vestre Viken Hospital Trust, Baerum Hospital, Norway, 3004, Drammen, Norway
| | - Knut Engedal
- Norwegian Centre for Dementia Research, Oslo University Hospital, Oslo, Norway
| | - Per Selnes
- Department of Neurology, Akershus University Hospital, Lørenskog, Norway
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Martins A, Schimidt HL, Garcia A, Colletta Altermann CD, Santos FW, Carpes FP, da Silva WC, Mello-Carpes PB. Supplementation with different teas from Camellia sinensis prevents memory deficits and hippocampus oxidative stress in ischemia-reperfusion. Neurochem Int 2017; 108:287-295. [PMID: 28465087 DOI: 10.1016/j.neuint.2017.04.019] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 04/22/2017] [Accepted: 04/28/2017] [Indexed: 02/06/2023]
Abstract
Memory and cognition impairments resultant of ischemic stroke could be minimized or avoided by antioxidant supplementation. In this regard, the neuroprotective potential of Green tea from Camellia sinensis has been investigated. However, there is a lack of information regarding the neuroprotective potential of others teas processed from the Camellia sinensis. Here we investigate the neuroprotective role of green, red, white and black tea on memory deficits and brain oxidative stress in a model of ischemic stroke in rats. Our findings show that green and red teas prevent deficits in object and social recognition memories, but only green tea protects against deficits in spatial memory and avoids hippocampal oxidative status and intense necrosis and others alterations in the brain tissue. In summary, green tea shows better neuroprotection in ischemic stroke than the others teas from Camellia sinensis.
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Affiliation(s)
- Alexandre Martins
- Physiology Research Group, Federal University of Pampa, Uruguaiana, RS, Brazil
| | - Helen L Schimidt
- Applied Neuromechanics Group, Federal University of Pampa, Uruguaiana, RS, Brazil
| | - Alexandre Garcia
- Physiology Research Group, Federal University of Pampa, Uruguaiana, RS, Brazil
| | | | - Francielli W Santos
- Biotechnology of Reproduction Laboratory, Federal University of Pampa, Uruguaiana, RS, Brazil
| | - Felipe P Carpes
- Applied Neuromechanics Group, Federal University of Pampa, Uruguaiana, RS, Brazil
| | - Weber Cláudio da Silva
- Neuropsychopharmacology Laboratory, University of the Centro-Oeste of Paraná, PR, Brazil
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Schaapsmeerders P, Tuladhar AM, Arntz RM, Franssen S, Maaijwee NA, Rutten-Jacobs LC, Schoonderwaldt HC, Dorresteijn LD, van Dijk EJ, Kessels RP, de Leeuw FE. Remote Lower White Matter Integrity Increases the Risk of Long-Term Cognitive Impairment After Ischemic Stroke in Young Adults. Stroke 2016; 47:2517-25. [DOI: 10.1161/strokeaha.116.014356] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Accepted: 08/05/2016] [Indexed: 12/16/2022]
Abstract
Background and Purpose—
Poststroke cognitive impairment occurs frequently in young patients with ischemic stroke (18 through 50 years of age). Accumulating data suggest that stroke is associated with lower white matter integrity remote from the stroke impact area, which might explain why some patients have good long-term cognitive outcome and others do not. Given the life expectancy of decades in young patients, we therefore investigated remote white matter in relation to long-term cognitive function.
Methods—
We included all consecutive first-ever ischemic stroke patients, left/right hemisphere, without recurrent stroke or transient ischemic attack during follow-up, aged 18 through 50 years, admitted to our university medical center between 1980 and 2010. One hundred seventeen patients underwent magnetic resonance imaging scanning including a T1-weighted scan, a diffusion tensor imaging scan, and completed a neuropsychological assessment. Patients were compared with a matched stroke-free control group (age, sex, and education matched). Cognitive impairment was defined as >1.5 SD below the mean cognitive index score of controls and no cognitive impairment as ≤1 SD. Tract-Based Spatial Statistics was used to assess the white matter integrity (fractional anisotropy and mean diffusivity).
Results—
About 11 years after ischemic stroke, lower remote white matter integrity was associated with a worse long-term cognitive performance. A lower remote white matter integrity, even in the contralesional hemisphere, was observed in cognitively impaired patients (n=25) compared with cognitively unimpaired patients (n=71).
Conclusions—
These findings indicate that although stroke has an acute onset, it might have long lasting effects on remote white matter integrity and thereby increases the risk of long-term cognitive impairment.
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Affiliation(s)
- Pauline Schaapsmeerders
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
| | - Anil M. Tuladhar
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
| | - Renate M. Arntz
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
| | - Sieske Franssen
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
| | - Noortje A.M. Maaijwee
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
| | - Loes C.A. Rutten-Jacobs
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
| | - Hennie C. Schoonderwaldt
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
| | - Lucille D.A. Dorresteijn
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
| | - Ewoud J. van Dijk
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
| | - Roy P.C. Kessels
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
| | - Frank-Erik de Leeuw
- From the Departments of Neurology (P.S., A.M.T., R.M.A., S.F., N.A.M.M., H.C.S., E.J.v.D., F.-E.d.L.) and Medical Psychology (R.P.C.K.), Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands; Department of Clinical Neurosciences, University of Cambridge, United Kingdom (L.C.A.R.-J.); and Department of Neurology, Medisch Spectrum Twente, Enschede, The Netherlands (L.D.A.D.)
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Zuo X, Hou Q, Jin J, Zhan L, Li X, Sun W, Lin K, Xu E. Inhibition of Cathepsin B Alleviates Secondary Degeneration in Ipsilateral Thalamus After Focal Cerebral Infarction in Adult Rats. J Neuropathol Exp Neurol 2016; 75:816-26. [PMID: 27371711 DOI: 10.1093/jnen/nlw054] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Secondary degeneration in areas beyond ischemic foci can inhibit poststroke recovery. The cysteine protease Cathepsin B (CathB) regulates cell death and intracellular protein catabolism. To investigate the roles of CathB in the development of secondary degeneration in the ventroposterior nucleus (VPN) of the ipsilateral thalamus after focal cerebral infarction, infarct volumes, immunohistochemistry and immunofluorescence, and Western blotting analyses were conducted in a distal middle cerebral artery occlusion (dMCAO) stroke model in adult rats. We observed marked neuron loss and gliosis in the ipsilateral thalamus after dMCAO, and the expression of CathB and cleaved caspase-3 in the VPN was significantly upregulated; glial cells were the major source of CathB. Although it had no effect on infarct volume, delayed intracerebroventricular treatment with the membrane-permeable CathB inhibitor CA-074Me suppressed the expression of CathB and cleaved caspase-3 in ipsilateral VPN and accordingly alleviated the secondary degeneration. These data indicate that CathB mediates a novel mechanism of secondary degeneration in the VPN of the ipsilateral thalamus after focal cortical infarction and suggest that CathB might be a therapeutic target for the prevention of secondary degeneration in patients after stroke.
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Affiliation(s)
- Xialin Zuo
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Institute of Neurosciences and the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China (XZ, QH, JJ, LZ, XL, WS, KL, EX); and Department of Neurology, Provincial People's Hospital, Guangdong No.2, Guangzhou, China (QH)
| | - Qinghua Hou
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Institute of Neurosciences and the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China (XZ, QH, JJ, LZ, XL, WS, KL, EX); and Department of Neurology, Provincial People's Hospital, Guangdong No.2, Guangzhou, China (QH)
| | - Jizi Jin
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Institute of Neurosciences and the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China (XZ, QH, JJ, LZ, XL, WS, KL, EX); and Department of Neurology, Provincial People's Hospital, Guangdong No.2, Guangzhou, China (QH)
| | - Lixuan Zhan
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Institute of Neurosciences and the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China (XZ, QH, JJ, LZ, XL, WS, KL, EX); and Department of Neurology, Provincial People's Hospital, Guangdong No.2, Guangzhou, China (QH)
| | - Xinyu Li
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Institute of Neurosciences and the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China (XZ, QH, JJ, LZ, XL, WS, KL, EX); and Department of Neurology, Provincial People's Hospital, Guangdong No.2, Guangzhou, China (QH)
| | - Weiwen Sun
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Institute of Neurosciences and the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China (XZ, QH, JJ, LZ, XL, WS, KL, EX); and Department of Neurology, Provincial People's Hospital, Guangdong No.2, Guangzhou, China (QH)
| | - Kunqin Lin
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Institute of Neurosciences and the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China (XZ, QH, JJ, LZ, XL, WS, KL, EX); and Department of Neurology, Provincial People's Hospital, Guangdong No.2, Guangzhou, China (QH)
| | - En Xu
- Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, Institute of Neurosciences and the Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, China (XZ, QH, JJ, LZ, XL, WS, KL, EX); and Department of Neurology, Provincial People's Hospital, Guangdong No.2, Guangzhou, China (QH).
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Wong GKC, Nung RCH, Sitt JCM, Mok VCT, Wong A, Ho FLY, Poon WS, Wang D, Abrigo J, Siu DYW. Location, Infarct Load, and 3-Month Outcomes of Delayed Cerebral Infarction After Aneurysmal Subarachnoid Hemorrhage. Stroke 2015; 46:3099-104. [PMID: 26419967 DOI: 10.1161/strokeaha.115.010844] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Accepted: 08/26/2015] [Indexed: 11/16/2022]
Affiliation(s)
- George Kwok Chu Wong
- From the Division of Neurosurgery, Department of Surgery (G.K.C.W., F.L.Y.H., W.S.P.), Department of Imaging and Interventional Radiology (R.C.H.N., J.C.M.S., D.W., J.A.), and Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M., A.W.), Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China; and Department of Diagnostic Radiology, Kwong Wah Hospital, Hong Kong, China (D.Y.W.S.)
| | - Ryan Chi Hang Nung
- From the Division of Neurosurgery, Department of Surgery (G.K.C.W., F.L.Y.H., W.S.P.), Department of Imaging and Interventional Radiology (R.C.H.N., J.C.M.S., D.W., J.A.), and Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M., A.W.), Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China; and Department of Diagnostic Radiology, Kwong Wah Hospital, Hong Kong, China (D.Y.W.S.)
| | - Jacqueline Ching Man Sitt
- From the Division of Neurosurgery, Department of Surgery (G.K.C.W., F.L.Y.H., W.S.P.), Department of Imaging and Interventional Radiology (R.C.H.N., J.C.M.S., D.W., J.A.), and Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M., A.W.), Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China; and Department of Diagnostic Radiology, Kwong Wah Hospital, Hong Kong, China (D.Y.W.S.)
| | - Vincent Chung Tong Mok
- From the Division of Neurosurgery, Department of Surgery (G.K.C.W., F.L.Y.H., W.S.P.), Department of Imaging and Interventional Radiology (R.C.H.N., J.C.M.S., D.W., J.A.), and Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M., A.W.), Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China; and Department of Diagnostic Radiology, Kwong Wah Hospital, Hong Kong, China (D.Y.W.S.)
| | - Adrian Wong
- From the Division of Neurosurgery, Department of Surgery (G.K.C.W., F.L.Y.H., W.S.P.), Department of Imaging and Interventional Radiology (R.C.H.N., J.C.M.S., D.W., J.A.), and Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M., A.W.), Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China; and Department of Diagnostic Radiology, Kwong Wah Hospital, Hong Kong, China (D.Y.W.S.)
| | - Faith Lok Yan Ho
- From the Division of Neurosurgery, Department of Surgery (G.K.C.W., F.L.Y.H., W.S.P.), Department of Imaging and Interventional Radiology (R.C.H.N., J.C.M.S., D.W., J.A.), and Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M., A.W.), Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China; and Department of Diagnostic Radiology, Kwong Wah Hospital, Hong Kong, China (D.Y.W.S.)
| | - Wai Sang Poon
- From the Division of Neurosurgery, Department of Surgery (G.K.C.W., F.L.Y.H., W.S.P.), Department of Imaging and Interventional Radiology (R.C.H.N., J.C.M.S., D.W., J.A.), and Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M., A.W.), Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China; and Department of Diagnostic Radiology, Kwong Wah Hospital, Hong Kong, China (D.Y.W.S.)
| | - Defeng Wang
- From the Division of Neurosurgery, Department of Surgery (G.K.C.W., F.L.Y.H., W.S.P.), Department of Imaging and Interventional Radiology (R.C.H.N., J.C.M.S., D.W., J.A.), and Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M., A.W.), Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China; and Department of Diagnostic Radiology, Kwong Wah Hospital, Hong Kong, China (D.Y.W.S.)
| | - Jill Abrigo
- From the Division of Neurosurgery, Department of Surgery (G.K.C.W., F.L.Y.H., W.S.P.), Department of Imaging and Interventional Radiology (R.C.H.N., J.C.M.S., D.W., J.A.), and Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M., A.W.), Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China; and Department of Diagnostic Radiology, Kwong Wah Hospital, Hong Kong, China (D.Y.W.S.)
| | - Deyond Yun Woon Siu
- From the Division of Neurosurgery, Department of Surgery (G.K.C.W., F.L.Y.H., W.S.P.), Department of Imaging and Interventional Radiology (R.C.H.N., J.C.M.S., D.W., J.A.), and Division of Neurology, Department of Medicine and Therapeutics (V.C.T.M., A.W.), Prince of Wales Hospital, Chinese University of Hong Kong, Hong Kong, China; and Department of Diagnostic Radiology, Kwong Wah Hospital, Hong Kong, China (D.Y.W.S.)
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Schaapsmeerders P, Tuladhar AM, Maaijwee NAM, Rutten-Jacobs LCA, Arntz RM, Schoonderwaldt HC, Dorresteijn LDA, van Dijk EJ, Kessels RPC, de Leeuw FE. Lower Ipsilateral Hippocampal Integrity after Ischemic Stroke in Young Adults: A Long-Term Follow-Up Study. PLoS One 2015; 10:e0139772. [PMID: 26462115 PMCID: PMC4603678 DOI: 10.1371/journal.pone.0139772] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 09/17/2015] [Indexed: 11/18/2022] Open
Abstract
Background and purpose Memory impairment after stroke is poorly understood as stroke rarely occurs in the hippocampus. Previous studies have observed smaller ipsilateral hippocampal volumes after stroke compared with controls. Possibly, these findings on macroscopic level are not the first occurrence of structural damage and are preceded by microscopic changes that may already be associated with a worse memory function. We therefore examined the relationship between hippocampal integrity, volume, and memory performance long after first-ever ischemic stroke in young adults. Methods We included all consecutive first-ever ischemic stroke patients, without hippocampal strokes or recurrent stroke/TIA, aged 18–50 years, admitted to our academic hospital between 1980 and 2010. One hundred and forty-six patients underwent T1 MPRAGE, DTI scanning and completed the Rey Auditory Verbal Learning Test and were compared with 84 stroke-free controls. After manual correction of hippocampal automatic segmentation, we calculated mean hippocampal fractional anisotropy (FA) and diffusivity (MD). Results On average 10 years after ischemic stroke, lesion volume was associated with lower ipsilateral hippocampal integrity (p<0.05), independent of hippocampal volume. In patients with a normal ipsilateral hippocampal volume (volume is less than or equal to 1.5 SD below the mean volume of controls) significant differences in ipsilateral hippocampal MD were observed (p<0.0001). However, patients with a normal hippocampal volume and high hippocampal MD did not show a worse memory performance compared with patients with a normal volume and low hippocampal MD (p>0.05). Conclusions Patients with average ipsilateral hippocampal volume could already have lower ipsilateral hippocampal integrity, although at present with no attendant worse memory performance compared with patients with high hippocampal integrity. Longitudinal studies are needed to investigate whether a low hippocampal integrity after stroke might lead to exacerbated memory decline with increasing age.
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Affiliation(s)
- Pauline Schaapsmeerders
- Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Nijmegen, the Netherlands
| | - Anil M. Tuladhar
- Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Nijmegen, the Netherlands
| | - Noortje A. M. Maaijwee
- Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Nijmegen, the Netherlands
| | | | - Renate M. Arntz
- Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Nijmegen, the Netherlands
| | - Hennie C. Schoonderwaldt
- Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Nijmegen, the Netherlands
| | | | - Ewoud J. van Dijk
- Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Nijmegen, the Netherlands
| | - Roy P. C. Kessels
- Donders Institute for Brain, Cognition and Behaviour, Centre for Neuroscience and Centre for Cognition, Radboud University Nijmegen, Nijmegen, the Netherlands
- Department of Medical Psychology, Radboud university medical centre, Nijmegen, the Netherlands
| | - Frank-Erik de Leeuw
- Radboud University Medical Centre, Donders Institute for Brain, Cognition and Behaviour, Department of Neurology, Nijmegen, the Netherlands
- * E-mail:
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