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Youssef MI, Ma J, Chen Z, Hu WW. Potential therapeutic agents for ischemic white matter damage. Neurochem Int 2021; 149:105116. [PMID: 34229025 DOI: 10.1016/j.neuint.2021.105116] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 06/24/2021] [Indexed: 11/19/2022]
Abstract
Ischemic white matter damage (WMD) is increasingly being considered as one of the major causes of neurological disorders in older adults and preterm infants. The functional consequences of WMD triggers a progressive cognitive decline and dementia particularly in patients with ischemic cerebrovascular diseases. Despite the major stride made in the pathogenesis mechanisms of ischemic WMD in the last century, effective medications are still not available. So, there is an urgent need to explore a promising approach to slow the progression or modify its pathological course. In this review, we discussed the animal models, the pathological mechanisms and the potential therapeutic agents for ischemic WMD. The development in the studies of anti-oxidants, free radical scavengers, anti-inflammatory or anti-apoptotic agents and neurotrophic factors in ischemic WMD were summarized. The agents which either alleviate oligodendrocyte damage or promote its proliferation or differentiation may have potential value for the treatment of ischemic WMD. Moreover, drugs with multifaceted protective activities or a wide therapeutic window may be optimal for clinical translation.
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Affiliation(s)
- Mahmoud I Youssef
- Department of Pharmacology, NHC and CAMS Key Laboratory of Medical Neurobiology, School of Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, PR China
| | - Jing Ma
- Department of Pharmacy, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200092, PR China.
| | - Zhong Chen
- Department of Pharmacology, NHC and CAMS Key Laboratory of Medical Neurobiology, School of Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, PR China; Key Laboratory of Neuropharmacology and Translational Medicine of Zhejiang Province, College of Pharmaceutical Sciences, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, 310053, PR China.
| | - Wei-Wei Hu
- Department of Pharmacology, NHC and CAMS Key Laboratory of Medical Neurobiology, School of Medicine, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, Zhejiang, 310058, PR China.
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2
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Jun YH, Ju GS, Chung YY, Shin HK, Kim DJ, Choi MS, Kim ST, Son KM. Differential Expression of Vascular Endothelial Growth Factor in the Cortex and Hippocampus upon Cerebral Hypoperfusion. In Vivo 2020; 34:191-197. [PMID: 31882479 DOI: 10.21873/invivo.11761] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2019] [Revised: 10/02/2019] [Accepted: 10/15/2019] [Indexed: 12/19/2022]
Abstract
BACKGROUND/AIM Vascular endothelial growth factor (VEGF) provides tolerance against ischemic brain injury, yet, the pattern of VEGF expression in the neurogenic zones following chronic cerebral hypoperfusion has not been studied. Here we evaluated the immunoreactivity of VEGF in a rat model of chronic cerebral hypoperfusion. MATERIALS AND METHODS Chronic hypoperfusion was induced by bilateral common carotid artery ligation in rats. Immunohistochemistry was performed against hypoxia-inducible factor-1α (HIF-1α) and VEGF on brain sections. RESULTS The density of HIF1α-positive cells in the hypoxia group was increased in the cerebral cortex and hippocampus. Further, the density of VEGF-positive cells was significantly higher in the hypoxia group compared to the control group in the cerebral cortex whereas it was similar in the subventricular zone, and in the dentate gyrus in the hippocampus between the two groups. CONCLUSION The pattern of VEGF expression varies in different brain regions following chronic cerebral hypoperfusion.
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Affiliation(s)
- Yong Hyun Jun
- Department of Anatomy, School of Medicine, Chosun University, Gwang-ju, Republic of Korea
| | - Gang San Ju
- Department of Plastic and Reconstructive Surgery, Chosun University Hospital, Gwang-ju, Republic of Korea
| | - Yoon Young Chung
- Department of Anatomy, School of Medicine, Chosun University, Gwang-ju, Republic of Korea
| | - Hye-Kyoung Shin
- Department of Anatomy, School of Medicine, Chosun University, Gwang-ju, Republic of Korea
| | - Dong-Joon Kim
- Department of Anesthesiology and Pain Medicine, Chosun University Hospital, Gwang-ju, Republic of Korea
| | - Min Seon Choi
- Department of Pediatrics, Chosun University Hospital, Gwang-ju, Republic of Korea
| | - Seong Taeck Kim
- Department of Ophthalmology, Chosun University Hospital, Gwang-ju, Republic of Korea
| | - Kyung Min Son
- Department of Plastic and Reconstructive Surgery, Chosun University Hospital, Gwang-ju, Republic of Korea
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Pérez-Corredor PA, Gutiérrez-Vargas JA, Ciro-Ramírez L, Balcazar N, Cardona-Gómez GP. High fructose diet-induced obesity worsens post-ischemic brain injury in the hippocampus of female rats. Nutr Neurosci 2020; 25:122-136. [DOI: 10.1080/1028415x.2020.1724453] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- P. A. Pérez-Corredor
- Neuroscience Group of Antioquia, Cellular and Molecular Neurobiology Area, SIU, Faculty of Medicine, University of Antioquia, Medellin, Colombia
| | - J. A. Gutiérrez-Vargas
- Neuroscience Group of Antioquia, Cellular and Molecular Neurobiology Area, SIU, Faculty of Medicine, University of Antioquia, Medellin, Colombia
- Faculty of Health Sciences, Corporación Universitaria Remington, Medellin, Colombia
| | - L. Ciro-Ramírez
- Faculty of Health Sciences, Corporación Universitaria Remington, Medellin, Colombia
| | - Norman Balcazar
- Molecular Genetics Group, University of Antioquia, Medellin, Colombia
- Department of Physiology and Biochemistry, School of Medicine, Universidad de Antioquia, Medellin, Colombia
| | - G. P. Cardona-Gómez
- Neuroscience Group of Antioquia, Cellular and Molecular Neurobiology Area, SIU, Faculty of Medicine, University of Antioquia, Medellin, Colombia
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Sabogal-Guáqueta AM, Villamil-Ortiz JG, Arias-Londoño JD, Cardona-Gómez GP. Inverse Phosphatidylcholine/Phosphatidylinositol Levels as Peripheral Biomarkers and Phosphatidylcholine/Lysophosphatidylethanolamine-Phosphatidylserine as Hippocampal Indicator of Postischemic Cognitive Impairment in Rats. Front Neurosci 2018; 12:989. [PMID: 30627084 PMCID: PMC6309919 DOI: 10.3389/fnins.2018.00989] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2018] [Accepted: 12/10/2018] [Indexed: 12/11/2022] Open
Abstract
Vascular dementia is a transversal phenomenon in different kinds of neurodegenerative diseases involving acute and chronic brain alterations. Specifically, the role of phospholipids in the pathogenesis of dementia remains unknown. In the present study, we explored phospholipid profiles a month postischemia in cognitively impaired rats. The two-vessel occlusion (2-VO) model was used to generate brain parenchyma ischemia in adult male rats confirmed by alterations in myelin, endothelium, astrocytes and inflammation mediator. A lipidomic analysis was performed via mass spectrometry in the hippocampus and serum a month postischemia. We found decreases in phospholipids (PLs) associated with neurotransmission, such as phosphatidylcholine (PC 32:0, PC 34:2, PC 36:3, PC 36:4, and PC 42:1), and increases in PLs implied in membrane structure and signaling, such as lysophosphatidylethanolamine (LPE 18:1, 20:3, and 22:6) and phosphatidylserine (PS 38:4, 36:2, and 40:4), in the hippocampus. Complementarily, PC (PC 34:2, PC 34:3, PC 38:5, and PC 36:5) and ether-PC (ePC 34:1, 34:2, 36:2, 38:2, and 38:3) decreased, while Lyso-PC (LPC 18:0, 18:1, 20:4, 20:5, and LPC 22:6) and phosphatidylinositol (PI 36:2, 38:4, 38:5, and 40:5), as neurovascular state sensors, increased in the serum. Taken together, these data suggest inverse PC/LPC-PI levels as peripheral biomarkers and inverse PC/LPE-PS as a central indicator of postischemic cognitive impairment in rats.
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Affiliation(s)
- Angelica Maria Sabogal-Guáqueta
- Neuroscience Group of Antioquia, Cellular and Molecular Neurobiology Area - School of Medicine, Sede de Investigación Universitaria (SIU), University of Antioquia, Medellin, Colombia
| | - Javier Gustavo Villamil-Ortiz
- Neuroscience Group of Antioquia, Cellular and Molecular Neurobiology Area - School of Medicine, Sede de Investigación Universitaria (SIU), University of Antioquia, Medellin, Colombia
| | | | - Gloria Patricia Cardona-Gómez
- Neuroscience Group of Antioquia, Cellular and Molecular Neurobiology Area - School of Medicine, Sede de Investigación Universitaria (SIU), University of Antioquia, Medellin, Colombia
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5
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Tiwari N, Bhatia P, Kumar A, Jaggi AS, Singh N. Potential of carnosine, a histamine precursor in rat model of bilateral common carotid artery occlusion-induced vascular dementia. Fundam Clin Pharmacol 2018; 32:516-531. [DOI: 10.1111/fcp.12376] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 03/28/2018] [Accepted: 04/13/2018] [Indexed: 01/04/2023]
Affiliation(s)
- Nidhi Tiwari
- CNS Research Lab.; Pharmacology Division; Department of Pharmaceutical Sciences and Drug Research; Faculty of Medicine; Punjabi University; Patiala 147002 Punjab India
| | - Pankaj Bhatia
- CNS Research Lab.; Pharmacology Division; Department of Pharmaceutical Sciences and Drug Research; Faculty of Medicine; Punjabi University; Patiala 147002 Punjab India
| | - Amit Kumar
- CNS Research Lab.; Pharmacology Division; Department of Pharmaceutical Sciences and Drug Research; Faculty of Medicine; Punjabi University; Patiala 147002 Punjab India
- Pharmacology Division; Maharaja Agrasen School of Pharmacy; Maharaja Agrasen University; Baddi 174103 Himachal Pradesh India
| | - Amteshwar S. Jaggi
- Pharmacology Division; Department of Pharmaceutical Sciences and Drug Research; Faculty of Medicine; Punjabi University; Patiala 147002 Punjab India
| | - Nirmal Singh
- Pharmacology Division; Department of Pharmaceutical Sciences and Drug Research; Faculty of Medicine; Punjabi University; Patiala 147002 Punjab India
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Hardigan T, Ward R, Ergul A. Cerebrovascular complications of diabetes: focus on cognitive dysfunction. Clin Sci (Lond) 2016; 130:1807-22. [PMID: 27634842 PMCID: PMC5599301 DOI: 10.1042/cs20160397] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Accepted: 07/11/2015] [Indexed: 01/01/2023]
Abstract
The incidence of diabetes has more than doubled in the United States in the last 30 years and the global disease rate is projected to double by 2030. Cognitive impairment has been associated with diabetes, worsening quality of life in patients. The structural and functional interaction of neurons with the surrounding vasculature is critical for proper function of the central nervous system including domains involved in learning and memory. Thus, in this review we explore cognitive impairment in patients and experimental models, focusing on links to vascular dysfunction and structural changes. Lastly, we propose a role for the innate immunity-mediated inflammation in neurovascular changes in diabetes.
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Affiliation(s)
- Trevor Hardigan
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, GA 30912, U.S.A
| | - Rebecca Ward
- Department of Neuroscience and Regenerative Medicine, Medical College of Georgia, Augusta University, Augusta, GA 30912, U.S.A
| | - Adviye Ergul
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, GA 30912, U.S.A. Charlie Norwood Veterans Administration Medical Center, Augusta, GA 30912, U.S.A.
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Kitamura A, Saito S, Maki T, Oishi N, Ayaki T, Hattori Y, Yamamoto Y, Urushitani M, Kalaria RN, Fukuyama H, Horsburgh K, Takahashi R, Ihara M. Gradual cerebral hypoperfusion in spontaneously hypertensive rats induces slowly evolving white matter abnormalities and impairs working memory. J Cereb Blood Flow Metab 2016; 36:1592-602. [PMID: 26661170 PMCID: PMC5012514 DOI: 10.1177/0271678x15606717] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Accepted: 07/29/2015] [Indexed: 12/31/2022]
Abstract
Rats subjected to bilateral common carotid arteries (CCAs) occlusion or 2-vessel occlusion (2VO) have been used as animal models of subcortical ischemic vascular dementia (SIVD). However, these models possess an inherent limitation in that cerebral blood flow (CBF) drops sharply and substantially after ligation of CCAs without vascular risk factors and causative small vessel changes. We previously reported a novel rat model of 2-vessel gradual occlusion (2VGO) in which ameroid constrictors (ACs) were placed bilaterally in the CCAs of Wistar-Kyoto rats. To simulate SIVD pathology more closely, we applied ACs in spontaneously hypertensive rats (SHRs), which naturally develop small vessel pathology, and compared their phenotypes with SHR-2VO and sham-operated rats. The mortality rate of the SHR-2VGO was 0% while that of the SHR-2VO was 56.5%. The CBF of the SHR-2VO dropped to 50% of the baseline level at 3 h, whereas the SHR-2VGO showed a gradual CBF reduction reaching only 68% of the baseline level at seven days. The SHR-2VGO showed slowly evolving white matter abnormalities and subsequent spatial working memory impairments of a similar magnitude to the remaining SHR-2VO at 28 days. We suggest the SHR-2VGO robustly replicates selective aspects of the pathophysiology of SIVD with low mortality rate.
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Affiliation(s)
- Akihiro Kitamura
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Satoshi Saito
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Takakuni Maki
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Naoya Oishi
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Takashi Ayaki
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Yorito Hattori
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Yumi Yamamoto
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Suita, Japan
| | - Makoto Urushitani
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Raj N Kalaria
- Institute of Neuroscience, Campus for Ageing and Vitality, Newcastle University, UK
| | - Hidenao Fukuyama
- Human Brain Research Center, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Karen Horsburgh
- Centre for Neuroregeneration, University of Edinburgh, Edinburgh, UK
| | - Ryosuke Takahashi
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
| | - Masafumi Ihara
- Department of Stroke and Cerebrovascular Diseases, National Cerebral and Cardiovascular Center, Suita, Japan
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8
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Helman AM, Murphy MP. Vascular cognitive impairment: Modeling a critical neurologic disease in vitro and in vivo. Biochim Biophys Acta Mol Basis Dis 2015; 1862:975-82. [PMID: 26704178 DOI: 10.1016/j.bbadis.2015.12.009] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2015] [Revised: 12/04/2015] [Accepted: 12/07/2015] [Indexed: 01/23/2023]
Abstract
BACKGROUND Vascular contributions to cognitive impairment and dementia (VCID) is a complex form of dementia, combining aspects of vascular disease and other forms of dementia, such as Alzheimer's disease. VCID encompasses a wide spectrum of cerebrovascular-driven cognitive impairment, from mild cognitive impairment to fully developed dementia. This disease state is further complicated by metabolic disorders, such as type 2 diabetes and hypertension, and lifestyle factors, like obesity and high fat diets. SCOPE OF REVIEW This manuscript is meant to both define VCID and review the in vitro and in vivo models of the disease state. This includes in vitro models of the neurovascular unit, models of chronic cerebral hypoperfusion, animals with NOTCH3 mutations as a model of small vessel disease, large animals with cerebral amyloid angiopathy (CAA), and animal models of mixed dementia. MAJOR CONCLUSIONS Synthetic microvessels are a promising technique to study the neurovascular unit and canines, despite the cost, are an excellent model to study CAA. While there are several good models of individual aspects of VCID, the heterogeneity of the disease states prevents them from being a model of all aspects of the disease. Therefore, VCID needs to be further defined into disease states that exist within this umbrella term. This includes specific guidelines for stroke counts and stroke locations and further categorization of overlapping cerebrovascular and AD pathologies that contribute to dementia. This will allow for better models and a more thorough understanding of how vascular disease contributes to dementia. GENERAL SIGNIFICANCE VCID is the second most common form of dementia and is expected to increase in coming years. The heterogeneity of VCID makes it difficult to study, but without better definitions and models, VCID presents a major public health problem for our aging population. This article is part of a Special Issue entitled: Vascular Contributions to Cognitive Impairment and Dementia, edited by M. Paul Murphy, Roderick A. Corriveau and Donna M. Wilcock.
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Affiliation(s)
- Alex M Helman
- Department of Molecular and Cellular Biochemistry, University of Kentucky, 800 South Limestone, Lexington, KY 40536, USA; Sanders-Brown Center on Aging, University of Kentucky, 800 South Limestone, Lexington, KY 40536, USA
| | - M Paul Murphy
- Department of Molecular and Cellular Biochemistry, University of Kentucky, 800 South Limestone, Lexington, KY 40536, USA; Sanders-Brown Center on Aging, University of Kentucky, 800 South Limestone, Lexington, KY 40536, USA.
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9
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The Effects of Exercise on Cognitive Recovery after Acquired Brain Injury in Animal Models: A Systematic Review. Neural Plast 2015; 2015:830871. [PMID: 26509085 PMCID: PMC4609870 DOI: 10.1155/2015/830871] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 06/09/2015] [Indexed: 12/15/2022] Open
Abstract
The objective of the present paper is to review the current status of exercise as a tool to promote cognitive rehabilitation after acquired brain injury (ABI) in animal model-based research. Searches were conducted on the PubMed, Scopus, and psycINFO databases in February 2014. Search strings used were: exercise (and) animal model (or) rodent (or) rat (and) traumatic brain injury (or) cerebral ischemia (or) brain irradiation. Studies were selected if they were (1) in English, (2) used adult animals subjected to acquired brain injury, (3) used exercise as an intervention tool after inflicted injury, (4) used exercise paradigms demanding movement of all extremities, (5) had exercise intervention effects that could be distinguished from other potential intervention effects, and (6) contained at least one measure of cognitive and/or emotional function. Out of 2308 hits, 22 publications fulfilled the criteria. The studies were examined relative to cognitive effects associated with three themes: exercise type (forced or voluntary), timing of exercise (early or late), and dose-related factors (intensity, duration, etc.). The studies indicate that exercise in many cases can promote cognitive recovery after brain injury. However, the optimal parameters to ensure cognitive rehabilitation efficacy still elude us, due to considerable methodological variations between studies.
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Villamil-Ortiz JG, Cardona-Gomez GP. Comparative analysis of autophagy and tauopathy related markers in cerebral ischemia and Alzheimer's disease animal models. Front Aging Neurosci 2015; 7:84. [PMID: 26042033 PMCID: PMC4436888 DOI: 10.3389/fnagi.2015.00084] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 04/30/2015] [Indexed: 01/07/2023] Open
Abstract
Alzheimer's disease (AD) and cerebral ischemia (CI) are neuropathologies that are characterized by aggregates of tau protein, a hallmark of cognitive disorder and dementia. Protein accumulation can be induced by autophagic failure. Autophagy is a metabolic pathway involved in the homeostatic recycling of cellular components. However, the role of autophagy in those tauopathies remains unclear. In this study, we performed a comparative analysis to identify autophagy related markers in tauopathy generated by AD and CI during short-term, intermediate, and long-term progression using the 3xTg-AD mouse model (aged 6,12, and 18 months) and the global CI 2-VO (2-Vessel Occlusion) rat model (1,15, and 30 days post-ischemia). Our findings confirmed neuronal loss and hyperphosphorylated tau aggregation in the somatosensory cortex (SS-Cx) of the 3xTg-AD mice in the late stage (aged 18 months), which was supported by a failure in autophagy. These results were in contrast to those obtained in the SS-Cx of the CI rats, in which we detected neuronal loss and tauopathy at 1 and 15 days post-ischemia, and this phenomenon was reversed at 30 days. We proposed that this phenomenon was associated with autophagy induction in the late stage, since the data showed a decrease in p-mTOR activity, an association of Beclin-1 and Vps34, a progressive reduction in PHF-1, an increase in LC3B puncta and autophago-lysosomes formation were observed. Furthermore, the survival pathways remained unaffected. Together, our comparative study suggest that autophagy could ameliorates tauopathy in CI but not in AD, suggesting a differential temporal approach to the induction of neuroprotection and the prevention of neurodegeneration.
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Affiliation(s)
| | - Gloria P. Cardona-Gomez
- *Correspondence: Gloria P. Cardona-Gomez, Cellular and Molecular Neurobiology Area, Group of Neuroscience of Antioquia, Faculty of Medicine, Sede de Investigación Universitaria, University of Antioquia, Calle 62 #52–59, Torre 1, Piso 4, Laboratorio 412, Antioquia, Medellín, Colombia
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Venkat P, Chopp M, Chen J. Models and mechanisms of vascular dementia. Exp Neurol 2015; 272:97-108. [PMID: 25987538 DOI: 10.1016/j.expneurol.2015.05.006] [Citation(s) in RCA: 197] [Impact Index Per Article: 21.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 05/04/2015] [Accepted: 05/08/2015] [Indexed: 02/02/2023]
Abstract
Vascular dementia (VaD) is the second leading form of dementia after Alzheimer's disease (AD) plaguing the elderly population. VaD is a progressive disease caused by reduced blood flow to the brain, and it affects cognitive abilities especially executive functioning. VaD is poorly understood and lacks suitable animal models, which constrain the progress on understanding the basis of the disease and developing treatments. This review article discusses VaD, its risk factors, induced cognitive disability, various animal (rodent) models of VaD, pathology, and mechanisms of VaD and treatment options.
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Affiliation(s)
- Poornima Venkat
- Neurology, Henry Ford Hospital, Detroit, MI, USA; Physics, Oakland University, Rochester, MI, USA.
| | - Michael Chopp
- Neurology, Henry Ford Hospital, Detroit, MI, USA; Physics, Oakland University, Rochester, MI, USA.
| | - Jieli Chen
- Neurology, Henry Ford Hospital, Detroit, MI, USA; Department of Geriatrics, Tianjin Medical University General Hospital, Tianjin Geriatrics Institute, Tianjin, China.
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12
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Lee KM, Bang J, Kim BY, Lee IS, Han JS, Hwang BY, Jeon WK. Fructus mume alleviates chronic cerebral hypoperfusion-induced white matter and hippocampal damage via inhibition of inflammation and downregulation of TLR4 and p38 MAPK signaling. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 15:125. [PMID: 25898017 PMCID: PMC4411748 DOI: 10.1186/s12906-015-0652-1] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/27/2013] [Accepted: 04/15/2015] [Indexed: 02/08/2023]
Abstract
Background Fructus mume (F. mume) has been used as a traditional medicine for many years in Asian countries. The present study was designed to determine the effect of a 70% ethanol extract of F. mume on white matter and hippocampal damage induced by chronic cerebral hypoperfusion. Methods Permanent bilateral common carotid artery occlusion (BCCAo) was performed on male Wistar rats to induce chronic cerebral hypoperfusion. Daily oral administration of F. mume (200 mg/kg) was initiated 21 days after BCCAo and continued for 42 days. The experimental groups in this study were divided into three groups: a sham-operated group, a BCCAo group, and a BCCAo group that was administered with the F. mume extract. The activation of glial cells, including microglia and astrocytes, and the levels of myelin basic protein (MBP), inflammatory mediators, Toll-like receptor 4 (TLR4), myeloid differentiation factor 88 (MyD88), and p38 mitogen-activated protein kinase (MAPK) phosphorylation were measured in brains from rats subjected to chronic BCCAo. Results Our results revealed that F. mume alleviates the reduction in MBP expression caused by chronic BCCAo in the white matter and the hippocampus and significantly attenuates microglial and astrocytic activation induced by chronic BCCAo in the optic tract of white matter. In addition, F. mume treatment reduced the increased expression of cyclooxygenase-2 (COX-2), interleukin-1β (IL-1β) and interleukin-6 (IL-6), as well as the activation of TLR4/MyD88 and p38 MAPK signaling, in the hippocampus of rats subjected to chronic BCCAo. Conclusion Taken together, our findings demonstrate that brain injury induced by chronic BCCAo is ameliorated by the anti-inflammatory effects of F. mume via inhibition of MBP degradation, microglial and astrocytic activation, increased inflammatory mediator expression, and activated intracellular signalings, including TLR4 and p38 MAPK, implying that F. mume is potentially an effective therapeutics for the treatment of vascular dementia. Electronic supplementary material The online version of this article (doi:10.1186/s12906-015-0652-1) contains supplementary material, which is available to authorized users.
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Liang CC, Lin YH, Liu HL, Lee TH. Bladder dysfunction induced by cerebral hypoperfusion after bilateral common carotid artery occlusion in rats. Neurourol Urodyn 2014; 34:586-91. [DOI: 10.1002/nau.22628] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 04/14/2014] [Indexed: 12/24/2022]
Affiliation(s)
- Ching-Chung Liang
- Division of Urogynecology, Department of Obstetrics and Gynecology; Chang Gung Memorial Hospital, Linkou Medical Center; Taoyuan Taiwan
- College of Medicine; Chang Gung University; Taoyuan Taiwan
| | - Yi-Hao Lin
- Division of Urogynecology, Department of Obstetrics and Gynecology; Chang Gung Memorial Hospital, Linkou Medical Center; Taoyuan Taiwan
- College of Medicine; Chang Gung University; Taoyuan Taiwan
| | - Ho-Ling Liu
- Department of Medical Imaging and Radiological Sciences, and Healthy Aging Research Center; Chang Gung University College of Medicine; Taoyuan Taiwan
| | - Tsong-Hai Lee
- College of Medicine; Chang Gung University; Taoyuan Taiwan
- Stroke Section, Department of Neurology and Stroke Center; Chang Gung Memorial Hospital Linkou Medical Center; Taoyuan Taiwan
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14
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Anastácio JR, Netto CA, Castro CC, Sanches EF, Ferreira DC, Noschang C, Krolow R, Dalmaz C, Pagnussat A. Resveratrol treatment has neuroprotective effects and prevents cognitive impairment after chronic cerebral hypoperfusion. Neurol Res 2014; 36:627-33. [DOI: 10.1179/1743132813y.0000000293] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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15
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Metaxa V, Lagoudaki R, Meditskou S, Thomareis O, Oikonomou L, Sakadamis A. Delayed post-ischaemic administration of xenon reduces brain damage in a rat model of global ischaemia. Brain Inj 2013; 28:364-9. [DOI: 10.3109/02699052.2013.865273] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Cardiotonic pill attenuates white matter and hippocampal damage via inhibiting microglial activation and downregulating ERK and p38 MAPK signaling in chronic cerebral hypoperfused rat. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 13:334. [PMID: 24274593 PMCID: PMC4222777 DOI: 10.1186/1472-6882-13-334] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 11/22/2013] [Indexed: 11/26/2022]
Abstract
Background The cardiotonic pill (CP) is a herbal medicine composed of Salvia miltiorrhiza (SM), Panax notoginseng (PN), and Dryobalanops aromatica Gaertner (DAG) that is widely used to treat cardiovascular diseases. The present experiment was conducted to examine the effects of CP on white matter and hippocampal damage induced by chronic cerebral hypoperfusion. Methods Chronic cerebral hypoperfusion was induced in male Wistar rats by permanent bilateral common carotid artery occlusion (BCCAo). Daily oral administration of CP (200 mg/kg) began 21 days after BCCAo and continued for 42 days. The levels of microglial activation and myelin basic protein (MBP) were measured in the white matter and hippocampus of rats with chronic BCCAo, and the expression levels of mitogen-activated protein kinases (MAPKs) and inflammatory markers such as cyclooxygenase-2, interleukin-1β, and interleukin-6 were examined. Results MBP expression was reduced in the white matter and hippocampal regions of rats that received BCCAo. In contrast, reduced levels of MBP were not observed in BCCAo rats given CP treatments. The administration of CP alleviated microglial activation, the alteration of ERK and p38 MAPK signaling, and inflammatory mediator expression in rats with chronic BCCAo. Conclusion These results suggest that CP may have protective effects against chronic BCCAo-induced white matter and hippocampal damage by inhibiting inflammatory processes including microglial activation and proinflammatory mediator expression, and downreguating the hyperphosphorylation of ERK and p38 MAPK signaling.
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Fitzpatrick CJ, Gopalakrishnan S, Cogan ES, Yager LM, Meyer PJ, Lovic V, Saunders BT, Parker CC, Gonzales NM, Aryee E, Flagel SB, Palmer AA, Robinson TE, Morrow JD. Variation in the form of Pavlovian conditioned approach behavior among outbred male Sprague-Dawley rats from different vendors and colonies: sign-tracking vs. goal-tracking. PLoS One 2013; 8:e75042. [PMID: 24098363 PMCID: PMC3787975 DOI: 10.1371/journal.pone.0075042] [Citation(s) in RCA: 95] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Accepted: 08/08/2013] [Indexed: 11/18/2022] Open
Abstract
Even when trained under exactly the same conditions outbred male Sprague-Dawley (SD) rats vary in the form of the Pavlovian conditioned approach response (CR) they acquire. The form of the CR (i.e. sign-tracking vs. goal-tracking) predicts to what degree individuals attribute incentive salience to cues associated with food or drugs. However, we have noticed variation in the incidence of these two phenotypes in rats obtained from different vendors. In this study, we quantified sign- and goal-tracking behavior in a reasonably large sample of SD rats obtained from two vendors (Harlan or Charles River), as well as from individual colonies operated by both vendors. Our sample of rats acquired from Harlan had, on average, more sign-trackers than goal-trackers, and vice versa for our sample of rats acquired from Charles River. Furthermore, there were significant differences among colonies of the same vendor. Although it is impossible to rule out environmental variables, SD rats at different vendors and barriers may have reduced phenotypic heterogeneity as a result of genetic variables, such as random genetic drift or population bottlenecks. Consistent with this hypothesis, we identified marked population structure among colonies from Harlan. Therefore, despite sharing the same name, investigators should be aware that important genetic and phenotypic differences exist among SD rats from different vendors or even from different colonies of the same vendor. If used judiciously this can be an asset to experimental design, but it can also be a pitfall for those unaware of the issue.
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Affiliation(s)
| | - Shyam Gopalakrishnan
- Department of Human Genetics, University of Chicago, Chicago, Illinois, United States of America
| | - Elizabeth S. Cogan
- Biopsychology Graduate Program, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Lindsay M. Yager
- Biopsychology Graduate Program, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Paul J. Meyer
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Vedran Lovic
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Benjamin T. Saunders
- Biopsychology Graduate Program, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Clarissa C. Parker
- Department of Human Genetics, University of Chicago, Chicago, Illinois, United States of America
| | - Natalia M. Gonzales
- Department of Human Genetics, University of Chicago, Chicago, Illinois, United States of America
| | - Emmanuel Aryee
- Department of Human Genetics, University of Chicago, Chicago, Illinois, United States of America
| | - Shelly B. Flagel
- Neuroscience Graduate Program, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Abraham A. Palmer
- Department of Human Genetics, University of Chicago, Chicago, Illinois, United States of America
- Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, Illinois, United States of America
| | - Terry E. Robinson
- Neuroscience Graduate Program, University of Michigan, Ann Arbor, Michigan, United States of America
- Biopsychology Graduate Program, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Psychology, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Jonathan D. Morrow
- Neuroscience Graduate Program, University of Michigan, Ann Arbor, Michigan, United States of America
- Department of Psychiatry, University of Michigan, Ann Arbor, Michigan, United States of America
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18
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Fuzik J, Gellért L, Oláh G, Herédi J, Kocsis K, Knapp L, Nagy D, Kincses ZT, Kis Z, Farkas T, Toldi J. Fundamental interstrain differences in cortical activity between Wistar and Sprague-Dawley rats during global ischemia. Neuroscience 2012; 228:371-81. [PMID: 23103797 DOI: 10.1016/j.neuroscience.2012.10.042] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2012] [Revised: 10/18/2012] [Accepted: 10/19/2012] [Indexed: 10/27/2022]
Abstract
Four-vessel occlusion (4VO), a frequently used model of global cerebral ischemia in rats, results in a dysfunction in wide brain areas, including the cerebral cortex and hippocampus. However, there are pronounced differences in response to global ischemia between the laboratory rat strains used in these studies. In the present work, the immediate acute effects of 4VO-induced global ischemia on the spontaneous electrocorticogram (ECoG) signals were analyzed in Wistar and Sprague-Dawley rats. The ECoG was isoelectric during the 10 min of global cerebral ischemia in Wistar rats and the first burst (FB) was seen 10-13 min after the start of reperfusion. In Sprague-Dawley rats, the FB was detected immediately after the start of 4VO or a few seconds later. The burst suppression ratio (BSR) in Wistar rats decreased to 45% in 5 min after FB, and after 25 min it was approximately 40%. In Sprague-Dawley rats, the BSR was 55% immediately after the FB and it decreased steeply to reach 0% by 10 min. There was also a significant difference between the two strains in the frequency composition of the ECoG pattern. The power spectral densities of the two strains differed virtually throughout the post-ischemic state. The histological results (Evans Blue, Cresyl Violet and Fluoro Jade C stainings) supplemented the electrophysiological data: the neuronal damage in the CA1 pyramids in Wistar rats was severe, whereas in the Sprague-Dawley animals it was only partial. These observations clearly demonstrate that the use of different rat strains (e.g. Wistar vs. Sprague-Dawley) can be a source of considerable variability in the results of acute experiments on global ischemia and it is important that the laboratory rats used in such experiments should be carefully chosen.
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Affiliation(s)
- J Fuzik
- University of Szeged, Department of Physiology, Anatomy and Neuroscience, Közép fasor 52, H-6726 Szeged, Hungary
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Kitamura A, Fujita Y, Oishi N, Kalaria RN, Washida K, Maki T, Okamoto Y, Hase Y, Yamada M, Takahashi J, Ito H, Tomimoto H, Fukuyama H, Takahashi R, Ihara M. Selective white matter abnormalities in a novel rat model of vascular dementia. Neurobiol Aging 2011; 33:1012.e25-35. [PMID: 22133276 DOI: 10.1016/j.neurobiolaging.2011.10.033] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2011] [Revised: 10/25/2011] [Accepted: 10/26/2011] [Indexed: 11/16/2022]
Abstract
Rats subjected to bilateral common carotid artery (CCA) occlusion or 2-vessel occlusion (2VO) have been used as animal models of subcortical ischemic vascular dementia. However, this model possesses an inherent limitation in that cerebral blood flow (CBF) drops too sharply and substantially after ligation of CCAs. To circumvent such hypoxic-ischemic conditions, we tested implantation of the ameroid constrictor device on bilateral CCAs of male Wistar-Kyoto rats and more precisely replicated chronic cerebral hypoperfusion by gradual narrowing of the CCAs (2-vessel gradual occlusion; 2VGO). The acute cerebral blood flow reduction and resultant inflammatory responses observed in the 2VO rats were eliminated in the 2VGO rats. Thus, chronic cerebral hypoperfusion was segregated, and induced selective white matter changes with relatively preserved neurovascular coupling and substantially less metabolic and histological derangements in the gray matter including the hippocampus. This led to significant spatial working memory impairment of a magnitude similar to the 2VO rats at 28 days postoperation. The 2VGO model may more closely mimic cognitive impairment subsequent to selective white matter damage.
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Affiliation(s)
- Akihiro Kitamura
- Department of Neurology, Graduate School of Medicine, Kyoto University, Sakyo-ku, Kyoto, Japan
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Is endothelial dysfunction of cerebral small vessel responsible for white matter lesions after chronic cerebral hypoperfusion in rats? J Neurol Sci 2010; 299:72-80. [PMID: 20850139 DOI: 10.1016/j.jns.2010.08.035] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Revised: 08/20/2010] [Accepted: 08/22/2010] [Indexed: 11/22/2022]
Abstract
Cerebral white matter (WM) lesions contribute to cognitive impairment and motor dysfunction in the elderly. Intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) are two important adhesion molecules that are upregulated during endothelial activation. Data from recent studies have suggested that ICAM-1 levels are related to progression of white matter hyperintensities (WMH) on MRI. In the present study, we hypothesized that ICAM-1 and VCAM-1 are involved in the endothelial dysfunction and the subsequent WM lesions after chronic cerebral hypoperfusion. Rats underwent bilateral common carotid artery ligation. They were divided into the lipoic acid group and the saline (vehicle) group. RT-PCR and double immunofluorescence for ICAM-1, VCAM-1, endothelial cells (staining positive for von Willebrand factor, vWF), reactive astrocytes (GFAP staining) and activated microglia/macrophages/(CD11b/c staining) were analyzed at baseline and at 1, 3, 7, 14 and 28 days after hypoperfusion. The severity of the WM lesions in the corpus callosum, internal capsule, and external capsule of both hemispheres was graded by luxol fast blue staining. RT-PCR and double immunofluorescence analysis of white matter from rats that had received lipoic acid (100mg/kg/day) for 28 days exhibited markedly reduced expression of ICAM-1 and VCAM-1 over endothelial cells compared with that of rats receiving saline. In the rats treated with lipoic acid, the WM lesions after chronic cerebral hypoperfusion were significantly less severe, and the number of reactive astrocytes and activated microglia/macrophages (CD11b/c staining) were also significantly lower as compared with the saline-treated rats. These findings indicate that endothelial dysfunction plays a critical role in overexpression of ICAM-1 and VCAM-1, glial cell activation and WM lesions after chronic cerebral hypoperfusion and suggest the potential value of lipoic acid as a therapeutic tool in cerebrovascular WM lesions. Our results also provide support for endothelial activation being involved in early pathogenesis of WM lesions and suggest that therapies that stabilize the endothelium may have a role in preventing WM lesions progression.
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Rac1 activity changes are associated with neuronal pathology and spatial memory long-term recovery after global cerebral ischemia. Neurochem Int 2010; 57:762-73. [PMID: 20817060 DOI: 10.1016/j.neuint.2010.08.014] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2009] [Revised: 07/01/2010] [Accepted: 08/10/2010] [Indexed: 11/21/2022]
Abstract
Excitotoxicity is the main event during neurological disorders producing drastic morphological and functional changes. Rac-GTPase is involved in cytoskeletal remodeling and survival. However, the role of Rac1 after cerebral ischemia has not been completely understood yet. In this study, we evaluated the activity of Rac1 and its immunoreactivity associated to neuropathological hallmarks and behavioral task analyses after global cerebral ischemia in an acute and long-term post-ischemia period. Our findings showed that during the acute phase (24h) after global cerebral ischemia, a decrease of the active state of Rac1 was detected in the hippocampus, together with a down-regulation of survival signaling. In this same post-ischemia time, Rac1 immunoreactivity was redistributed to cytoplasm and to aberrant neurites, accompanied by dendritic and actin cytoskeletal retraction both in vivo and in vitro in neuronal primary cultures treated with glutamate. Neurons transfected with the constitutively active mutant of Rac1 were recovered from the glutamate-induced affection in vitro. However, in the in vivo model an inactive state of Rac1, and its cellular localization remained one month after ischemia, with still decreased survival signaling, significant tauopathy, and learning and memory alterations. These neuropathological hallmarks were reversed two months post-ischemia, related with a Rac1 activity state similar to control, as well as a "normalization" of the learning and memory tasks in the ischemic rats. In summary, our data suggests that changes in Rac1 activity are involved in the neurodegenerative processes after cerebral ischemia, and also in its long-term recovery.
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Portelli J, Aourz N, De Bundel D, Meurs A, Smolders I, Michotte Y, Clinckers R. Intrastrain differences in seizure susceptibility, pharmacological response and basal neurochemistry of Wistar rats. Epilepsy Res 2009; 87:234-46. [PMID: 19833479 DOI: 10.1016/j.eplepsyres.2009.09.009] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2009] [Revised: 09/16/2009] [Accepted: 09/18/2009] [Indexed: 10/20/2022]
Abstract
Reliable well-characterised animal models of seizures are necessary in order to better understand the underlying pathophysiological mechanisms as well as to screen potential anticonvulsant drugs. We currently use the focal pilocarpine model as an acute limbic seizure model. Due to breeding problems at the vendor, and apparent changes in pilocarpine-induced seizure susceptibility, we were forced to change breeding locations and vendors over a period of 2 years. Male Wistar rats were either purchased from two breeding locations of Charles River Laboratories (France and Germany), or obtained from Harlan Laboratories (The Netherlands). In the present retrospective study we evaluated the impact of these vendor changes on ketamine dosing to establish anaesthesia, on pilocarpine-induced seizure susceptibility, and on basal extracellular hippocampal noradrenaline, dopamine, serotonin, gamma-amino butyric acid, and glutamate levels of all pilocarpine-treated rats included in our studies. Significant differences were present in all of the parameters analyzed. This study clearly illustrates that intrastrain differences do exist from one vendor/breeding location to another, or even between rats from the same breeding location.
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Affiliation(s)
- Jeanelle Portelli
- Department of Pharmaceutical Chemistry, Drug Analysis & Drug Information, Vrije Universiteit Brussel, Brussels, Belgium
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23
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Farkas E, Luiten PGM, Bari F. Permanent, bilateral common carotid artery occlusion in the rat: a model for chronic cerebral hypoperfusion-related neurodegenerative diseases. ACTA ACUST UNITED AC 2007; 54:162-80. [PMID: 17296232 DOI: 10.1016/j.brainresrev.2007.01.003] [Citation(s) in RCA: 510] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2006] [Revised: 12/30/2006] [Accepted: 01/03/2007] [Indexed: 11/16/2022]
Abstract
Chronic cerebral hypoperfusion has been associated with cognitive decline in aging and Alzheimer's disease. Moreover, the pattern of cerebral blood flow in mild cognitive impairment has emerged as a predictive marker for the progression into Alzheimer's disease. The reconstruction of a pathological condition in animal models is a suitable approach to the unraveling of causal relationships. For this reason, permanent, bilateral occlusion of the common carotid arteries (2VO) in rats has been established as a procedure to investigate the effects of chronic cerebral hypoperfusion on cognitive dysfunction and neurodegenerative processes. Over the years, the 2VO model has generated a large amount of data, revealing the 2VO-related pattern of cerebral hypoperfusion and metabolic changes, learning and memory disturbances, failure of neuronal signaling, and the neuropathological changes in the hippocampus. In addition, the model has been introduced in research into ischemic white matter injury and ischemic eye disease. The present survey sets out to provide a comprehensive summary of the achievements made with the 2VO model, and a critical evaluation and integration of the various results, and to relate the experimental data to human diseases. The data that have accumulated from use of the 2VO model in the rat permit an understanding of the causative role played by cerebral hypoperfusion in neurodegenerative diseases. Thorough characterization of the model suggests that 2VO in the rat is suitable for the development of potentially neuroprotective strategies in neurodegenerative diseases.
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Affiliation(s)
- Eszter Farkas
- Department of Anatomy, School of Medicine, University of Szeged, H-6701 Szeged, P.O. Box 427, Hungary.
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Tai KK, Truong DD. NMDA receptor-mediated excitotoxicity contributes to the cerebral hypoxic injury of a rat model of posthypoxic myoclonus. Brain Res 2006; 1133:209-15. [PMID: 17196560 DOI: 10.1016/j.brainres.2006.11.076] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2006] [Revised: 11/16/2006] [Accepted: 11/17/2006] [Indexed: 11/16/2022]
Abstract
Cardiac arrest-induced cerebral hypoxic injury could induce posthypoxic movement disorders. Here we investigated the effects of memantine, an NMDA receptor channel blocker, on the neurodegeneration occurred in an established rat model of posthypoxic myoclonus. We found that administration of memantine for 7 days significantly reduced cerebral hypoxia-induced neurodegeneration in the CA1 of the hippocampus, the reticular thalamic nucleus (RTN) and the primary fissure of the cerebellum of the posthypoxic animals. The results suggest that the neurodegeneration observed in specific areas of the brain of the posthypoxic rats is contributed by NMDA receptor-mediated excitotoxicity.
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Affiliation(s)
- Kwok-Keung Tai
- The Parkinson's and Movement Disorder Research Laboratory, Long Beach Memorial Medical Center, Long Beach, CA 90806, USA.
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