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Yang L, Li CY, Ouyang JY, Li MZ, Zhan Y, Feng XF, Lu Y, Li MC, Lei JF, Zhao T, Wang L, Zou HY, Zhao H. Trillium tschonoskii rhizomes' saponins induces oligodendrogenesis and axonal reorganization for ischemic stroke recovery in rats. JOURNAL OF ETHNOPHARMACOLOGY 2021; 279:114358. [PMID: 34166736 DOI: 10.1016/j.jep.2021.114358] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Revised: 06/18/2021] [Accepted: 06/19/2021] [Indexed: 06/13/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Trillium tschonoskii Maxim. is one of traditional Chinese medical herbs that has been utilized to treat brain damages and cephalalgia. The neuroprotective effect of total saponins from Trillium tschonoskii rhizome (TSTT) has been demonstrated efficacy in rats following ischemia. However, the axonal remodeling effect of TSTT and the detailed mechanisms after ischemic stroke have not been investigated. AIM OF THE STUDY We aimed to estimate therapeutic role of TSTT in axonal remodeling using magnetic resonance imaging (MRI) technique, and explored possible mechanisms underlying this process followed by histological assays in ischemic rats. METHODS Male Sprague-Dawley (SD) rats underwent permanently focal cerebral ischemia induced by occluding right permanent middle cerebral artery. TSTT was intragastrically administrated 6 h after surgery and once daily for consecutive 15 days. Neurological function was assessed by the motor deficit score and beam walking test. T2 relaxation mapping and diffusion tensor imaging (DTI) were applied for detecting cerebral tissues damages and microstructural integrity of axons. Luxol fast blue (LFB) and transmission electron microscope (TEM) were performed to evaluate histopathology in myelinated axons. Double immunofluorescent staining was conducted to assess oligodendrogenesis. Furthermore, the protein expressions regarding to axonal remodeling related signaling pathways were detected by Western blot assays. RESULTS TSTT treatment (65, 33 mg/kg) markedly improved motor function after ischemic stroke. T2 mapping MRI demonstrated that TSTT decreased lesion volumes, and DTI further confirmed that TSTT preserved axonal microstructure of the sensorimotor cortex and internal capsule. Meanwhile, diffusion tensor tractography (DTT) showed that TSTT elevated correspondent density and length of fiber in the internal capsule. These MRI measurements were confirmed by histological examinations. Notably, TSTT significantly increased Ki67/NG2, Ki67/CNPase double-labeled cells along the boundary zone of ischemic cortex and striatum. Meanwhile, TSTT treatment up-regulated the phosphorylation level of Ser 9 in GSK-3β, and down-regulated phosphorylated β-catenin and CRMP-2 expression. CONCLUSION Taken together, our findings indicated that TSTT (65, 33 mg/kg) enhanced post-stroke functional recovery, amplified endogenous oligodendrogenesis and promoted axonal regeneration. The beneficial role of TSTT might be correlated with GSK-3/β-catenin/CRMP-2 modulating axonal reorganization after ischemic stroke.
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Affiliation(s)
- Le Yang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Chang-Yi Li
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Jun-Yao Ouyang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Man-Zhong Li
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Yu Zhan
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Xue-Feng Feng
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Yun Lu
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Ming-Cong Li
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Jian-Feng Lei
- Medical Imaging laboratory of Core Facility Center, Capital Medical University, Beijing, 100069, China.
| | - Ting Zhao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Lei Wang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Hai-Yan Zou
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
| | - Hui Zhao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China; Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
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Sun L, Wang G, Wu Z, Xie Y, Zhou L, Xiao L, Wang H. Swimming exercise reduces the vulnerability to stress and contributes to the AKT/GSK3β/CRMP2 pathway and microtubule dynamics mediated protective effects on neuroplasticity in male C57BL/6 mice. Pharmacol Biochem Behav 2021; 211:173285. [PMID: 34626621 DOI: 10.1016/j.pbb.2021.173285] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 11/25/2022]
Abstract
While swimming exercise has been shown to positively affect the development of the nervous system, it still remains unclear whether it reduces the vulnerability to stress. In this study, male C57BL/6 mice were exposed to swimming training for 5 weeks, and then subjected to chronic unpredictable mild stress (CUMS) for 4 weeks. We found that swimming exercise prevented anxiety-like and depressive phenotypes induced by CUMS, including increased anxiety-like behavior in the open field test (OFT) and elevated plus-maze (EPM) test and increased despair behavior in the tail suspension test (TST). Moreover, the control+stress group showed reduced expression of phosphorylated AKT kinase (p-AKT), phosphorylated glycogen synthase kinase-3β (p-GSK3β), and tubulin-tyrosine ligase (Tyr-tubulin) and increased protein expression of phosphorylated collapsin response mediator protein 2 (p-CRMP-2); the control+control, swim+control, and swim+stress groups exhibited higher expression of these proteins than the control+stress group. This study confirmed that swimming exercise could reduce the vulnerability of individuals to stress and that it contributes to the AKT/GSK-3β/CRMP-2 pathway and microtubule dynamics mediated protective effects on neuroplasticity. The AKT/GSK-3β/CRMP-2 pathway and microtubule dynamics may be involved in resilience to stress.
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Affiliation(s)
- Limin Sun
- Department of Psychiatry, Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Jiefang Road No. 238, Wuhan 430060, China
| | - Gaohua Wang
- Department of Psychiatry, Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Jiefang Road No. 238, Wuhan 430060, China.
| | - Zuotian Wu
- Department of Psychiatry, Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Jiefang Road No. 238, Wuhan 430060, China
| | - Yumeng Xie
- Department of Psychiatry, Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Jiefang Road No. 238, Wuhan 430060, China
| | - Lin Zhou
- Department of Psychiatry, Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Jiefang Road No. 238, Wuhan 430060, China
| | - Ling Xiao
- Department of Psychiatry, Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Jiefang Road No. 238, Wuhan 430060, China
| | - Huiling Wang
- Department of Psychiatry, Institute of Neuropsychiatry, Renmin Hospital of Wuhan University, Jiefang Road No. 238, Wuhan 430060, China
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Bone marrow-derived mesenchymal stem cells improve post-ischemia neurological function in rats via the PI3K/AKT/GSK-3β/CRMP-2 pathway. Mol Cell Biochem 2021; 476:2193-2201. [PMID: 33559827 DOI: 10.1007/s11010-021-04073-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 01/16/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND Transplantation of bone marrow-derived mesenchymal stem cells (BMSCs) is a potential therapy for cerebral ischemia. However, the underlying protective mechanism remains undetermined. Here, we tested the hypothesis that transplantation of BMSCs via intravenous injection can alleviate neurological functional deficits through activating PI3K/AKT signaling pathway after cerebral ischemia in rats. METHODS A cerebral ischemic rat model was established by the 2 h middle cerebral artery occlusion (MCAO). Twenty-four hours later, BMSCs (1 × 106 in 1 ml PBS) from SD rats were injected into the tail vein. Neurological function was evaluated by modified neurological severity score (mNSS) and modified adhesive removal test before and on d1, d3, d7, d10 and d14 after MCAO. Protein expressions of AKT, GSK-3β, CRMP-2 and GAP-43 were detected by Western-bolt. NF-200 was detected by immunofluorescence. RESULTS BMSCs transplantation did not only significantly improve the mNSS score and the adhesive-removal somatosensory test after MCAO, but also increase the density of NF-200 and the expression of p-AKT, pGSK-3β and GAP-43, while decrease the expression of pCRMP-2. Meanwhile, these effects can be suppressed by LY294002, a specific inhibitor of PI3K/AKT. CONCLUSION These data suggest that transplantation of BMSCs could promote axon growth and neurological deficit recovery after MCAO, which was associated with activation of PI3K/AKT /GSK-3β/CRMP-2 signaling pathway.
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Lacosamide modulates collapsin response mediator protein 2 and inhibits mossy fiber sprouting after kainic acid-induced status epilepticus. Neuroreport 2019; 29:1384-1390. [PMID: 30169428 DOI: 10.1097/wnr.0000000000001123] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Mossy fiber sprouting (MFS) and neuronal loss are important pathological features of chronic epilepsy closely related to the development of spontaneous recurrent seizures. However, the pathological mechanism of MFS remains unclear. Collapsin response mediator protein 2 (CRMP2) is a cytoplasmic protein highly expressed in the nervous system and is involved in axon/dendrite specification and axonal growth. It is possibly associated with the development of MFS. Lacosamide (LCM), a novel antiepileptic drug, was recently found to inhibit the CRMP2-mediated neurite outgrowth. Therefore, we studied the relationships between LCM, CRMP2, and MFS, seeking potential therapeutic targets for epileptogenesis and a better understanding of the mechanism of action of LCM. We used kainic acid to induce status epilepticus in an animal model and examined the resultant changes in protein expression by Western blot and changes in histology by specific staining for cell death and MFS. Our results showed that the expression level of CRMP2 was elevated and the expression level of phosphorylated CRMP2 (p-CRMP2) was reduced following status epilepticus. Administration of LCM not only reversed this effect but also suppressed spontaneous recurrent seizures and reduced MFS and loss of hippocampal neurons. This study reveals that, in addition to its antiseizure efficacy, LCM has a neuroprotective effect and inhibits the development of epilepsy. CRMP2 is possibly involved in the mechanism by which LCM suppresses MFS and is expected to be a new therapeutic target for treating epileptogenesis.
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Shah FA, Liu G, Al Kury LT, Zeb A, Abbas M, Li T, Yang X, Liu F, Jiang Y, Li S, Koh PO. Melatonin Protects MCAO-Induced Neuronal Loss via NR2A Mediated Prosurvival Pathways. Front Pharmacol 2019; 10:297. [PMID: 31024297 PMCID: PMC6461025 DOI: 10.3389/fphar.2019.00297] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 03/11/2019] [Indexed: 12/27/2022] Open
Abstract
Stroke is the significant cause of human mortality and sufferings depending upon race and demographic location. Melatonin is a potent antioxidant that exerts protective effects in differential experimental stroke models. Several mechanisms have been previously suggested for the neuroprotective effects of melatonin in ischemic brain injury. The aim of this study is to investigate whether melatonin treatment affects the glutamate N-methyl-D-aspartate (NMDA) and alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA) receptor signaling in cerebral cortex and striatum 24 h after permanent middle cerebral artery occlusion (MCAO). Melatonin (5 mg/kg) attenuated ischemia-induced down regulation of NMDA receptor 2 (NR2a), postsynaptic density-95 (PSD95) and increases NR2a/PSD95 complex association, which further activates the pro-survival PI3K/Akt/GSK3β pathway with mitigated collapsin response mediator protein 2 (CRMP2) phosphorylation. Furthermore, melatonin increases the expression of γ-enolase, a neurotrophic factor in ischemic cortex and striatum, and preserve the expression of presynaptic (synaptophysin and SNAP25) and postsynaptic (p-GluR1845) protein. Our study demonstrated a novel neuroprotective mechanism for melatonin in ischemic brain injury which could be a promising neuroprotective agent for the treatment of ischemic stroke.
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Affiliation(s)
- Fawad Ali Shah
- State Key Laboratory of Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, China.,Riphah Institute of Pharmaceutical Sciences, Riphah International University Islamabad, Islamabad, Pakistan
| | - Gongping Liu
- Key Laboratory of Ministry of Education of China and Hubei Province for Neurological Disorders, Department of Pathophysiology, School of Basic Medicine and the Collaborative Innovation Center for Brain Science, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Co-innovation Center of Neuroregeneration, Nantong University, Nantong, China
| | - Lina T Al Kury
- College of Natural and Health Sciences, Zayed University, Abu Dhabi, United Arab Emirates
| | - Alam Zeb
- Riphah Institute of Pharmaceutical Sciences, Riphah International University Islamabad, Islamabad, Pakistan
| | - Muzaffar Abbas
- Department of Pharmacy, Capital University of Science and Technology, Islamabad, Pakistan
| | - Tao Li
- Department of Forensic Medicine, School of Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Xifei Yang
- Centre for Addiction and Mental Health, Campbell Research Institute, Toronto, ON, Canada
| | - Fang Liu
- Department of Psychiatry, University of Toronto, Toronto, ON, Canada.,Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
| | - Yuhua Jiang
- Cancer Centre, The Second Hospital of Shandong University, Jinan, China
| | - Shupeng Li
- State Key Laboratory of Oncogenomics, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen, China.,Department of Psychiatry, University of Toronto, Toronto, ON, Canada.,Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Center for Disease Control and Prevention, Shenzhen, China
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Li MZ, Zhang Y, Zou HY, Ouyang JY, Zhan Y, Yang L, Cheng BCY, Wang L, Zhang QX, Lei JF, Zhao YY, Zhao H. Investigation of Ginkgo biloba extract (EGb 761) promotes neurovascular restoration and axonal remodeling after embolic stroke in rat using magnetic resonance imaging and histopathological analysis. Biomed Pharmacother 2018; 103:989-1001. [DOI: 10.1016/j.biopha.2018.04.125] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Revised: 04/14/2018] [Accepted: 04/17/2018] [Indexed: 02/06/2023] Open
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Li MZ, Zhang Y, Zou HY, Wang YL, Cheng BCY, Wang L, Zhang QX, Lei JF, Zhao H. Xiaoshuan enteric-coated capsule alleviates cognitive impairment by enhancing hippocampal glucose metabolism, hemodynamics and neuroplasticity of rat with chronic cerebral hypoperfusion. Sci Rep 2018; 8:7449. [PMID: 29748641 PMCID: PMC5945608 DOI: 10.1038/s41598-018-25929-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 05/01/2018] [Indexed: 11/29/2022] Open
Abstract
Chronic cerebral hypoperfusion (CCH) is identified as a critical risk factor of dementia in patients with cerebrovascular disease. Xiaoshuan enteric-coated capsule (XSECC) is a compound Chinese medicine approved by Chinese State Food and Drug Administration for promoting brain remodeling and plasticity after stroke. The present study aimed to explore the potential of XSECC to improve cognitive function after CCH and further investigate the underlying mechanisms. CCH was induced by bilateral common carotid artery occlusion (BCCAO) in rats. XSECC (420 or 140 mg/kg) treatment remarkably reversed BCCAO-induced cognitive deficits. Notably, after XSECC treatment, magnetic resonance angiography combined with arterial spin labeling noninvasively demonstrated significantly improved hippocampal hemodynamics, and 18F-FDG PET/CT showed enhanced hippocampal glucose metabolism. In addition, XSECC treatment markedly alleviated neuropathologies and improved neuroplasticity in the hippocampus. More importantly, XSECC treatment facilitated axonal remodeling by regulating the phosphorylation of axonal growth related proteins including protein kinase B (AKT), glycogen synthase kinase-3β (GSK-3β) and collapsin response mediator protein-2 (CRMP2) in the hippocampus. Taken together, the present study demonstrated the beneficial role of XSECC in alleviating BCCAO-induced cognitive deficits by enhancing hippocampal glucose metabolism, hemodynamics and neuroplasticity, suggesting that XSECC could be a useful strategy in cerebral hypoperfusion state and dementia.
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Affiliation(s)
- Man-Zhong Li
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China
| | - Yi Zhang
- Department of Pharmacology, Beijing University of Chinese Medicine, Beijing, 100102, China
| | - Hai-Yan Zou
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China
| | - Ya-Li Wang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China
| | - Brian-Chi Yan Cheng
- College of Professional and Continuing Education, The Hong Kong Polytechnic University, Hung Hom, Hong Kong, China
| | - Lei Wang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China
| | - Qiu-Xia Zhang
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China.,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China
| | - Jian-Feng Lei
- Medical Imaging laboratory of Core Facility Center, Capital Medical University, Beijing, 100069, China
| | - Hui Zhao
- School of Traditional Chinese Medicine, Capital Medical University, Beijing, 100069, China. .,Beijing Key Lab of TCM Collateral Disease Theory Research, Beijing, 100069, China.
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Wang Y, Wang XL, Xie GL, Li HY, Wang YL. Collapsin Response Mediator Protein-2-induced Retinal Ischemic Injury in a Novel Mice Model of Ocular Ischemia Syndrome. Chin Med J (Engl) 2018; 130:1342-1351. [PMID: 28524835 PMCID: PMC5455045 DOI: 10.4103/0366-6999.206340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Collapsin response mediator protein-2 (CRMP2) has been shown to be involved in ischemia/hypoxia (IH) injury. We determined whether CRMP2 modulates ischemic injury in the retinal of Ocular ischemic syndrome (OIS). This study was to explore the molecular mechanisms underlying OIS in a novel mice model. METHODS Experiments were performed on adult male C57/BL6 mice that received bilateral internal carotid arteries ligation for 1, 2, or 4 weeks. The mice received injection of calpeptin group before occlusion for 4 weeks or not. The expression of CRMP2 in the retinal was examined by western blotting (WB) analysis and immunohistochemical analysis (IHC). The effects of ischemic injury on retinal were evaluated by fundus examination, fundus fluorescein angiography, electroretinogram, cell counting of retinal ganglion cell (RGC), and measurement of the thickness of the retina. RESULTS The veins dilated after chronic ischemia. In the electroretinography, the amplitudes of a- and b-waves kept diminishing in an ischemia time-dependent manner. Moreover, the tail vein-retinal circulation time prolonged in the 1- and 2-week group. In comparison, thickness of the retina decreased gradually with the ischemia time elapsed. WB analysis showed the CRMP2 and p-CRMP2 levels decreased in the 2- and 4-week groups. The results of IHC analysis were compatible with our results of WB. The loss of RGCs, decrease of the total reaction time and reduction of CRMP2 was alleviated by intravitreal injection of calpeptin. CONCLUSIONS These results revealed that bilateral ligation of the internal carotid artery causes retinal ischemia in mice. Moreover, CRMP2 might play a pivotal role during the ischemic injury in the retina and inhibit the cleavage of CRMP2 can ameliorate the IH injury.
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Affiliation(s)
- Yu Wang
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Xiao-Lei Wang
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Guo-Li Xie
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Hong-Yang Li
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Yan-Ling Wang
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
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Ohshima M, Coq JO, Otani K, Hattori Y, Ogawa Y, Sato Y, Harada-Shiba M, Ihara M, Tsuji M. Mild intrauterine hypoperfusion reproduces neurodevelopmental disorders observed in prematurity. Sci Rep 2016; 6:39377. [PMID: 27996031 PMCID: PMC5171836 DOI: 10.1038/srep39377] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2016] [Accepted: 11/23/2016] [Indexed: 12/17/2022] Open
Abstract
Severe intrauterine ischemia is detrimental to the developing brain. The impact of mild intrauterine hypoperfusion on neurological development, however, is still unclear. We induced mild intrauterine hypoperfusion in rats on embryonic day 17 via arterial stenosis with metal microcoils wrapped around the uterine and ovarian arteries. All pups were born with significantly decreased birth weights. Decreased gray and white matter areas were observed without obvious tissue damage. Pups presented delayed newborn reflexes, muscle weakness, and altered spontaneous activity. The levels of proteins indicative of inflammation and stress in the vasculature, i.e., RANTES, vWF, VEGF, and adiponectin, were upregulated in the placenta. The levels of mRNA for proteins associated with axon and astrocyte development were downregulated in fetal brains. The present study demonstrates that even mild intrauterine hypoperfusion can alter neurological development, which mimics the clinical signs and symptoms of children with neurodevelopmental disorders born prematurely or with intrauterine growth restriction.
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Affiliation(s)
- Makiko Ohshima
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Osaka 565-8565, Japan
| | - Jacques-Olivier Coq
- Institut de Neurosciences de la Timone, UMR7289, CNRS, Aix Marseille Université, Marseille 13005, France
| | - Kentaro Otani
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Osaka 565-8565, Japan
| | - Yorito Hattori
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Osaka 565-8565, Japan
| | - Yuko Ogawa
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Osaka 565-8565, Japan
| | - Yoshiaki Sato
- Division of Neonatology, Center for Maternal-Neonatal Care, Nagoya University Hospital, Nagoya 466-8550, Japan
| | - Mariko Harada-Shiba
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Osaka 565-8565, Japan
| | - Masafumi Ihara
- Department of Stroke and Cerebrovascular Diseases, National Cerebral and Cardiovascular Center, Osaka 565-8565, Japan
| | - Masahiro Tsuji
- Department of Regenerative Medicine and Tissue Engineering, National Cerebral and Cardiovascular Center, Osaka 565-8565, Japan
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Yang X, Zhang X, Li Y, Han S, Howells DW, Li S, Li J. Conventional protein kinase Cβ-mediated phosphorylation inhibits collapsin response-mediated protein 2 proteolysis and alleviates ischemic injury in cultured cortical neurons and ischemic stroke-induced mice. J Neurochem 2016; 137:446-59. [PMID: 26788931 DOI: 10.1111/jnc.13538] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 01/07/2016] [Accepted: 01/11/2016] [Indexed: 01/13/2023]
Abstract
We previously reported that conventional protein kinase C (cPKC)β participated in hypoxic preconditioning-induced neuroprotection against cerebral ischemic injury, and collapsin response-mediated protein 2 (CRMP2) was identified as a cPKCβ interacting protein. In this study, we explored the regulation of CRMP2 phosphorylation and proteolysis by cPKCβ, and their role in ischemic injury of oxygen-glucose deprivation (OGD)-treated cortical neurons and brains of mice with middle cerebral artery occlusion-induced ischemic stroke. The results demonstrated that cPKCβ-mediated CRMP2 phosphorylation via the cPKCβ-selective activator 12-deoxyphorbol 13-phenylacetate 20-acetate (DOPPA) and inhibition of calpain-mediated CRMP2 proteolysis by calpeptin and a fusing peptide containing TAT peptide and the calpain cleavage site of CRMP2 (TAT-CRMP2) protected neurons against OGD-induced cell death through inhibiting CRMP2 proteolysis in cultured cortical neurons. The OGD-induced nuclear translocation of the CRMP2 breakdown product was inhibited by DOPPA, calpeptin, and TAT-CRMP2 in cortical neurons. In addition, both cPKCβ activation and CRMP2 proteolysis inhibition by hypoxic preconditioning and intracerebroventricular injections of DOPPA, calpeptin, and TAT-CRMP2 improved the neurological deficit in addition to reducing the infarct volume and proportions of cells with pyknotic nuclei in the peri-infact region of mice with ischemic stroke. These results suggested that cPKCβ modulates CRMP2 phosphorylation and proteolysis, and cPKCβ activation alleviates ischemic injury in the cultured cortical neurons and brains of mice with ischemic stroke through inhibiting CRMP2 proteolysis by phosphorylation. Focal cerebral ischemia induces a large flux of Ca(2+) to activate calpain which cleaves collapsin response mediator (CRMP) 2 into breakdown product (BDP). Inhibition of CRMP2 cleavage by calpeptin and TAT-CRMP2 alleviates ischemic injury. Conventional protein kinase C (cPKC)β-mediated phosphorylation could inhibit CRMP2 proteolysis and alleviate ischemic injury in cultured cortical neurons and ischemic stroke-induced mice.
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Affiliation(s)
- Xuan Yang
- Department of Neurobiology and Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Xinxin Zhang
- Department of Neurobiology and Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Yun Li
- Department of Neurobiology and Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - Song Han
- Department of Neurobiology and Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
| | - David W Howells
- Florey Institute of Neuroscience and Mental Health, Melbourne, Victoria, Australia
| | - Shujuan Li
- Department of Neurology, Capital Medical University Affiliated Beijing Chao-Yang Hospital, Beijing, China
| | - Junfa Li
- Department of Neurobiology and Beijing Institute for Brain Disorders, Capital Medical University, Beijing, China
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Arbeille E, Reynaud F, Sanyas I, Bozon M, Kindbeiter K, Causeret F, Pierani A, Falk J, Moret F, Castellani V. Cerebrospinal fluid-derived Semaphorin3B orients neuroepithelial cell divisions in the apicobasal axis. Nat Commun 2015; 6:6366. [PMID: 25721514 DOI: 10.1038/ncomms7366] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2014] [Accepted: 01/22/2015] [Indexed: 01/05/2023] Open
Abstract
The spatial orientation of cell divisions is fundamental for tissue architecture and homeostasis. Here we analysed neuroepithelial progenitors in the developing mouse spinal cord to determine whether extracellular signals orient the mitotic spindle. We report that Semaphorin3B (Sema3B) released from the floor plate and the nascent choroid plexus in the cerebrospinal fluid (CSF) controls progenitor division orientation. Delivery of exogenous Sema3B to neural progenitors after neural tube opening in living embryos promotes planar orientation of their division. Preventing progenitor access to cues present in the CSF by genetically engineered canal obstruction affects the proportion of planar and oblique divisions. Sema3B knockout phenocopies the loss of progenitor access to the CSF. Sema3B binds to the apical surface of mitotic progenitors and exerts its effect via Neuropilin receptors, GSK3 activation and subsequent inhibition of the microtubule stabilizer CRMP2. Thus, extrinsic control mediated by the Semaphorin signalling orients progenitor divisions in neurogenic zones.
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Affiliation(s)
- Elise Arbeille
- University of Lyon, University of Lyon1, CGΦMC, UMR CNRS 5534, F-69100 Villeurbanne, France
| | - Florie Reynaud
- University of Lyon, University of Lyon1, CGΦMC, UMR CNRS 5534, F-69100 Villeurbanne, France
| | - Isabelle Sanyas
- University of Lyon, University of Lyon1, CGΦMC, UMR CNRS 5534, F-69100 Villeurbanne, France
| | - Muriel Bozon
- University of Lyon, University of Lyon1, CGΦMC, UMR CNRS 5534, F-69100 Villeurbanne, France
| | - Karine Kindbeiter
- University of Lyon, University of Lyon1, CGΦMC, UMR CNRS 5534, F-69100 Villeurbanne, France
| | - Frédéric Causeret
- CNRS UMR 7592, Institut Jacques Monod, University Paris Diderot, Sorbonne Paris Cité, F-75205 Paris, France
| | - Alessandra Pierani
- CNRS UMR 7592, Institut Jacques Monod, University Paris Diderot, Sorbonne Paris Cité, F-75205 Paris, France
| | - Julien Falk
- University of Lyon, University of Lyon1, CGΦMC, UMR CNRS 5534, F-69100 Villeurbanne, France
| | - Frédéric Moret
- University of Lyon, University of Lyon1, CGΦMC, UMR CNRS 5534, F-69100 Villeurbanne, France
| | - Valérie Castellani
- University of Lyon, University of Lyon1, CGΦMC, UMR CNRS 5534, F-69100 Villeurbanne, France
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Specific binding of lacosamide to collapsin response mediator protein 2 (CRMP2) and direct impairment of its canonical function: implications for the therapeutic potential of lacosamide. Mol Neurobiol 2014; 51:599-609. [PMID: 24944082 DOI: 10.1007/s12035-014-8775-9] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Accepted: 06/01/2014] [Indexed: 12/22/2022]
Abstract
The novel antiepileptic drug lacosamide (LCM; SPM927, Vimpat®) has been heralded as having a dual-mode of action through interactions with both the voltage-gated sodium channel and the neurite outgrowth-promoting collapsin response mediator protein 2 (CRMP2). Lacosamide's ability to dampen neuronal excitability through the voltage-gated sodium channel likely underlies its efficacy in attenuating the symptoms of epilepsy (i.e., seizures). While the role of CRMP2 in epilepsy has not been well studied, given the proposed involvement of circuit reorganization in epileptogenesis, the ability of lacosamide to alter CRMP2 function may prove disease modifying. Recently, however, the validity of lacosamide's interaction with CRMP2 has come under scrutiny. In this review, we address the contradictory reports concerning the binding of lacosamide to CRMP2 as well as the ability of lacosamide to directly impact CRMP2 function. Additionally, we address similarly the contradicting reports regarding the potential disease-modifying effect of lacosamide on the development and progression of epilepsy. As the vast majority of antiepileptic drugs influences only the symptoms of epilepsy, the ability to hinder disease progression would be a major breakthrough in efforts to cure or prevent this debilitating syndrome.
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13
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Tat-Collapsin Response Mediator Protein 2 (CRMP2) Increases the Survival of Neurons After NMDA Excitotoxity by Reducing the Cleavage of CRMP2. Neurochem Res 2013; 38:2095-104. [DOI: 10.1007/s11064-013-1118-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2013] [Revised: 07/22/2013] [Accepted: 07/25/2013] [Indexed: 10/26/2022]
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14
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Wang Y, Li B, Li Z, Huang S, Wang J, Sun R. Improvement of hypoxia-ischemia-induced white matter injury in immature rat brain by ethyl pyruvate. Neurochem Res 2013; 38:742-52. [PMID: 23471594 DOI: 10.1007/s11064-013-0972-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2012] [Revised: 12/10/2012] [Accepted: 01/11/2013] [Indexed: 01/09/2023]
Abstract
Ethyl pyruvate (EP) has been reported to be neuroprotective in several models of brain injury, yet its influence on periventricular leukomalacia still remains elusive. Here we investigated whether repeated administration of EP could protect against white matter injury after hypoxia-ischemia (HI) (right common carotid artery ligation and 6 % O2 for 60 min) in post-natal 3 day rat pups. EP was injected (50 mg/kg, intraperitoneally) 10 min, 1 and 24 h after HI insult. Treatment with EP significantly reduced HI-induced ventricular enlargement, loss of developing oligodendrocytes, and hypomyelination. We further demonstrated a marked inhibitory effect of EP on inflammatory responses, as indicated by the decreased number of activated microglia and astrocytes and the reduced release of proinflammatory cytokines. Moreover, EP down-regulated the expression of cleaved caspase-3 and Bax, and up-regulated Bcl-2 expression after HI exposure. In conclusion, our results demonstrated that EP was able to provide potent protection on white matter injury through blocking the cerebral inflammatory responses and modulating the apoptotic death program of oligodendrocytes, indicating a potential neuroprotective agent in neonatal brain injury.
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Affiliation(s)
- Yingyan Wang
- Pediatric Department of Qilu Hospital, Shandong University, Wenhuaxi Road 44, Jinan, 250012 Shandong Province, China
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Involvement of the Akt/GSK-3β/CRMP-2 pathway in axonal injury after hypoxic–ischemic brain damage in neonatal rat. Neuroscience 2012; 216:123-32. [DOI: 10.1016/j.neuroscience.2012.04.052] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 04/01/2012] [Accepted: 04/19/2012] [Indexed: 11/17/2022]
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