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https://www.readbyqxmd.com/read/29905040/-promotion-of-transplanted-collagen-scaffolds-combined-with-brain-derived-neurotrophic-factor-for-axonal-regeneration-and-motor-function-recovery-in-rats-after-transected-spinal-cord-injury
#1
Xi Chen, Yongheng Fan, Zhifeng Xiao, Xing Li, Bin Yang, Yannan Zhao, Xianglin Hou, Sufang Han, Jianwu Dai
Objective: To evaluate the effect of the combination of collagen scaffold and brain-derived neurotrophic factor (BDNF) on the repair of transected spinal cord injury in rats. Methods: Thirty-two Sprague-Dawley rats were randomly divided into 4 groups: group A (sham operation group), T 9 , T 10 segments of the spinal cord was only exposed; group B, 4-mm T 9 , T 10 segments of the spinal cord were resected; group C, 4-mm T 9 , T 10 segments of the spinal cord were resected and linear ordered collagen scaffolds (LOCS) with corresponding length was transplanted into lesion site; group D, 4-mm T 9 , T 10 segments of the spinal cord were resected and LOCS with collagen binding domain (CBD)-BDNF was transplanted into lesion site...
June 1, 2018: Chinese Journal of Reparative and Reconstructive Surgery
https://www.readbyqxmd.com/read/29902485/a-nanoformulation-for-the-preferential-accumulation-in-adult-neurogenic-niches
#2
Catarina Praça, Akhilesh Rai, Tiago Santos, Ana C Cristovão, Sonia L Pinho, Romeo Cecchelli, Marie-Pierre Dehouck, Liliana Bernardino, Lino S Ferreira
Stimulation of adult neurogenesis by targeting the endogenous neural stem cells (NSCs), located in hippocampus and subventricular zone (SVZ), with nanoformulations has been proposed for brain repair in cases of neurodegenerative diseases. Unfortunately, it is relatively unknown the nanoformulation properties to facilitate their accumulation in the neurogenic niches after intravenous injection. Here, we have screened different gold-based formulations having variable morphology, surface chemistry and responsiveness to light for their capacity to cross the blood brain barrier (BBB) and accumulate preferentially in the neurogenic niches...
June 11, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29895321/neural-stem-cell-therapy-for-subacute-and-chronic-ischemic-stroke
#3
REVIEW
Austin C Boese, Quan-Son Eric Le, Dylan Pham, Milton H Hamblin, Jean-Pyo Lee
Neural stem cells (NSCs) play vital roles in brain homeostasis and exhibit a broad repertoire of potentially therapeutic actions following neurovascular injury. One such injury is stroke, a worldwide leading cause of death and disability. Clinically, extensive injury from ischemic stroke results from ischemia-reperfusion (IR), which is accompanied by inflammation, blood-brain barrier (BBB) damage, neural cell death, and extensive tissue loss. Tissue plasminogen activator (tPA) is still the only US Food and Drug Administration-approved clot-lysing agent...
June 13, 2018: Stem Cell Research & Therapy
https://www.readbyqxmd.com/read/29808458/transfer-of-obturator-nerve-for-femoral-nerve-injury-an-experiment-study-in-rats
#4
Depeng Meng, Jun Zhou, Yaofa Lin, Zheng Xie, Huihao Chen, Ronghua Yu, Haodong Lin, Chunlin Hou
BACKGROUND: Quadriceps palsy is mainly caused by proximal lesions in the femoral nerve. The obturator nerve has been previously used to repair the femoral nerve, although only a few reports have described the procedure, and the outcomes have varied. In the present study, we aimed to confirm the feasibility and effectiveness of this treatment in a rodent model using the randomized control method. METHODS: Sixty Sprague-Dawley rats were randomized into two groups: the experimental group, wherein rats underwent femoral neurectomy and obturator nerve transfer to the femoral nerve motor branch; and the control group, wherein rats underwent femoral neurectomy without nerve transfer...
May 28, 2018: Acta Neurochirurgica
https://www.readbyqxmd.com/read/29696925/-effects-of-electroacupuncture-at-changqiang-gv-1-on-expression-of-nerve-growth-factor-and-brain-derived-neurotrophic-factor-in-rats-after-acute-spinal-cord-injury
#5
Zhiqiang Huang, Yu Liu, Zhaoyuan Su, Jiafu Su, Qiang Wu
OBJECTIVE: To observe the effects of electroacupuncture (EA) at"Changqiang"(GV 1) on expression of nerve growth factor (NGF) and brain derived neurotrophic factor (BDNF) in rats after acute spinal cord injury (ASCI), and to explore the mechanism of EA at"Changqiang"(GV 1) on ASCI. METHODS: Twenty-four adult female SD rats were randomly divided into an EA group, a model group and a sham operation group, 8 rats in each one. The rats in the sham operation group were treated with laminectomy to expose the spinal cord without any strike...
April 12, 2018: Zhongguo Zhen Jiu, Chinese Acupuncture & Moxibustion
https://www.readbyqxmd.com/read/29619293/in-vivo-photoacoustic-imaging-of-brain-injury-and-rehabilitation-by-high-efficient-near-infrared-dye-labeled-mesenchymal-stem-cells-with-enhanced-brain-barrier-permeability
#6
Weitao Li, Ronghe Chen, Jing Lv, Hongke Wang, Yu Liu, Ya Peng, Zhiyu Qian, Guo Fu, Liming Nie
Stem cell migration and interaction with pathology are critical to understand the complexity and status of disease recovery progress. However, the dynamic visualization still remains a great challenge due to imaging technical limitation, cell labeling difficulty, or blood-brain barrier (BBB). Herein, fast photoacoustic tomography (PAT) with optical molecular probes is applied to noninvasively monitor traumatic brain injury (TBI) and its rehabilitation. The vascular distribution and TBI hemorrhage are clearly imaged, longitudinally monitored, and quantified...
February 2018: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/29618808/fibrinogen-in-neurological-diseases-mechanisms-imaging-and-therapeutics
#7
REVIEW
Mark A Petersen, Jae Kyu Ryu, Katerina Akassoglou
The blood coagulation protein fibrinogen is deposited in the brain in a wide range of neurological diseases and traumatic injuries with blood-brain barrier (BBB) disruption. Recent research has uncovered pleiotropic roles for fibrinogen in the activation of CNS inflammation, induction of scar formation in the brain, promotion of cognitive decline and inhibition of repair. Such diverse roles are possible in part because of the unique structure of fibrinogen, which contains multiple binding sites for cellular receptors and proteins expressed in the nervous system...
May 2018: Nature Reviews. Neuroscience
https://www.readbyqxmd.com/read/29618365/apolipoprotein-e4-impairs-spontaneous-blood-brain-barrier-repair-following-traumatic-brain-injury
#8
Bevan S Main, Sonia Villapol, Stephanie S Sloley, David J Barton, Maia Parsadanian, Chinyere Agbaegbu, Kathryn Stefos, Mondona S McCann, Patricia M Washington, Olga C Rodriguez, Mark P Burns
BACKGROUND: Traumatic Brain Injury (TBI) is a major cause of disability and mortality, to which there is currently no comprehensive treatment. Blood Brain Barrier (BBB) dysfunction is well documented in human TBI patients, yet the molecular mechanisms that underlie this neurovascular unit (NVU) pathology remains unclear. The apolipoprotein-E (apoE) protein has been implicated in controlling BBB integrity in an isoform dependent manner, via suppression of Cyclophilin A (CypA)-Matrix metallopeptidase-9 (MMP-9) signaling cascades, however the contribution of this pathway in TBI-induced BBB permeability is not fully investigated...
April 4, 2018: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/29571873/transplantation-of-in-vitro-cultured-endothelial-progenitor-cells-repairs-the-blood-brain-barrier-and-improves-cognitive-function-of-app-ps1-transgenic-ad-mice
#9
Shishuang Zhang, Yongle Zhi, Fei Li, Shan Huang, Huabin Gao, Zhaoli Han, Xintong Ge, Dai Li, Fanglian Chen, Xiaodong Kong, Ping Lei
To date, the pathogenesis of Alzheimer's disease (AD) remains unclear. It is well-known that excessive deposition of Aβ in the brain is a crucial part of the pathogenesis of AD. In recent years, the AD neurovascular unit hypothesis has attracted much attention. Impairment of the blood-brain barrier (BBB) leads to abnormal amyloid-β (Aβ) transport, and chronic cerebral hypoperfusion causes Aβ deposition throughout the onset and progression of AD. Endothelial progenitor cells (EPCs) are the universal cells for repairing blood vessels...
April 15, 2018: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29486300/vascular-tight-junction-disruption-and-angiogenesis-in-spontaneously-hypertensive-rat-with-neuroinflammatory-white-matter-injury
#10
Yi Yang, Shihoko Kimura-Ohba, Jeffrey F Thompson, Victor M Salayandia, Melissa Cossé, Limor Raz, Fakhreya Y Jalal, Gary A Rosenberg
Vascular cognitive impairment is a major cause of dementia caused by chronic hypoxia, producing progressive damage to white matter (WM) secondary to blood-brain barrier (BBB) opening and vascular dysfunction. Tight junction proteins (TJPs), which maintain BBB integrity, are lost in acute ischemia. Although angiogenesis is critical for neurovascular remodeling, less is known about its role in chronic hypoxia. To study the impact of TJP degradation and angiogenesis during pathological progression of WM damage, we used the spontaneously hypertensive/stroke prone rats with unilateral carotid artery occlusion and Japanese permissive diet to model WM damage...
June 2018: Neurobiology of Disease
https://www.readbyqxmd.com/read/29452218/tnf%C3%AE-disrupts-blood-brain-barrier-integrity-to-maintain-prolonged-depressive-like-behavior-in-mice
#11
Yuyan Cheng, Sachi Desse, Ana Martinez, Ryan J Worthen, Richard S Jope, Eleonore Beurel
Recovery from major depressive disorder is difficult, particularly in patients who are refractory to antidepressant treatments. To examine factors that regulate recovery, we developed a prolonged learned helplessness depression model in mice. After the induction of learned helplessness, mice were separated into groups that recovered or did not recover within 4 weeks. Comparisons were made between groups in hippocampal proteins, inflammatory cytokines, and blood brain barrier (BBB) permeability. Compared with mice that recovered and control mice, non-recovered mice displaying prolonged learned helplessness had greater hippocampal activation of glycogen synthase kinase-3 (GSK3), higher levels of tumor necrosis factor-α (TNFα), interleukin-17A, and interleukin-23, increased permeability of the blood brain barrier (BBB), and lower levels of the BBB tight junction proteins occludin, ZO1, and claudin-5...
March 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29430654/enhanced-efficacy-of-azd3759-and-radiation-on-brain-metastasis-from-egfr-mutant-non-small-cell-lung-cancer
#12
Xue Li, Yingchun Wang, Jia Wang, Tianwei Zhang, Li Zheng, Zhenfan Yang, Ligang Xing, Jinming Yu
The prognosis of patients with brain metastasis (BM) is poor. In our study, we demonstrated that AZD3759, an EGFR tyrosine kinase inhibitors (TKIs) with excellent blood-brain barrier (BBB) penetration, combined with radiation enhanced the antitumor efficacy in BM model from EGFR mutant (EGFRm) NSCLC. Besides, the antitumor activity displayed no difference between radiation concurrently with AZD3759 and radiation sequentially with AZD3759. Mechanistically, we found that two factors determined the enhanced efficacy: cells with EGFRm which were sensitive to AZD3759, and a relative high concentration of AZD3759...
July 1, 2018: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/29332257/kynurenic-acid-and-its-derivatives-are-able-to-modulate-the-adhesion-and-locomotion-of-brain-endothelial-cells
#13
Eszter Lajkó, Bernadett Tuka, Ferenc Fülöp, István Krizbai, József Toldi, Kálmán Magyar, László Vécsei, László Kőhidai
The neuroprotective actions of kynurenic acid (KYNA) and its derivatives in several neurodegenerative disorders [characterized by damage to the cerebral endothelium and to the blood-brain barrier (BBB)] are well established. Cell-extracellular matrix (ECM) adhesion is supposedly involved in recovery of impaired cerebral endothelium integrity (endothelial repair). The present work aimed to investigate the effects of KYNA and its synthetic derivatives on cellular behaviour (e.g. adhesion and locomotion) and on morphology of the GP8 rat brain endothelial cell line, modeling the BBB endothelium...
January 13, 2018: Journal of Neural Transmission
https://www.readbyqxmd.com/read/29311672/ephb3-signaling-induces-cortical-endothelial-cell-death-and-disrupts-the-blood-brain-barrier-after-traumatic-brain-injury
#14
Poincyane Assis-Nascimento, Yanina Tsenkina, Daniel J Liebl
Damage to the cerebrovascular network is a major contributor to dysfunction in patients suffering from traumatic brain injury (TBI). Vessels are composed of lumen-forming endothelial cells that associate closely with both glial and neuronal units to establish a functional blood-brain barrier (BBB). Under normal physiological conditions, these vascular units play important roles in central nervous system (CNS) homeostasis by delivering oxygen and nutrients while filtering out molecules and cells that could be harmful; however, after TBI this system is disrupted...
January 8, 2018: Cell Death & Disease
https://www.readbyqxmd.com/read/29215736/protective-effect-of-epigenetic-silencing-of-cyclind1-against-spinal-cord-injury-using-bone-marrow-derived-mesenchymal-stem-cells-in-rats
#15
Yuan Wang, Qing-Jie Kong, Jin-Chuan Sun, Xi-Ming Xu, Yong Yang, Ning Liu, Jian-Gang Shi
This study focuses on the protective effect of epigenetic silencing of CyclinD1 against spinal cord injury (SCI) using bone marrow-derived mesenchymal stem cells (BMSCs) in rats. Eighty-eight adult female Wistar rats were randomly assigned into the sham group, the control group, the si-CyclinD1 + BMSCs group and the BMSCs group. CyclinD1 protein and mRNA expressions after siRNA transfection were detected by Western blotting and qRT-PCR. The siRNA-CyclinD1 BMSCs were transplanted into rats in the si-CyclinD1 + BMSCs group using stereotaxic method 6 hr after SCI...
July 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29133510/single-cell-immuno-laser-microdissection-coupled-to-label-free-proteomics-to-reveal-the-proteotypes-of-human-brain-cells-after-ischemia
#16
Teresa García-Berrocoso, Víctor Llombart, Laura Colàs-Campàs, Alexandre Hainard, Virginie Licker, Anna Penalba, Laura Ramiro, Alba Simats, Alejandro Bustamante, Elena Martínez-Saez, Francesc Canals, Jean-Charles Sanchez, Joan Montaner
Cerebral ischemia entails rapid tissue damage in the affected brain area causing devastating neurological dysfunction. How each component of the neurovascular unit contributes or responds to the ischemic insult in the context of the human brain has not been solved yet. Thus, the analysis of the proteome is a straightforward approach to unraveling these cell proteotypes. In this study, post-mortem brain slices from ischemic stroke patients were obtained corresponding to infarcted (IC) and contralateral (CL) areas...
January 2018: Molecular & Cellular Proteomics: MCP
https://www.readbyqxmd.com/read/29115923/neuroprotective-effect-of-neuroserpin-in-non-tpa-induced-intracerebral-hemorrhage-mouse-models
#17
Wei Li, Tetsuya Asakawa, Sha Han, Baoguo Xiao, Hiroki Namba, Chuanzhen Lu, Qiang Dong, Liang Wang
BACKGROUND: The neuroprotective effects of neuroserpin (NSP) have been well documented in both patients and animal models with cerebral ischemia; however, have never been investigated in hemorrhagic stroke. The aim of this study is to verify the neuroprotection of NSP in the non-tPA-induced intracerebral hemorrhage (ICH) mouse model. METHODS: C57BL/6J male mice (n = 198) were involved in this study. ICH models were established with infusion of autologous blood into the brain parenchyma...
November 7, 2017: BMC Neurology
https://www.readbyqxmd.com/read/29061693/alzheimer-s-disease-a-matter-of-blood-brain-barrier-dysfunction
#18
REVIEW
Axel Montagne, Zhen Zhao, Berislav V Zlokovic
The blood-brain barrier (BBB) keeps neurotoxic plasma-derived components, cells, and pathogens out of the brain. An early BBB breakdown and/or dysfunction have been shown in Alzheimer's disease (AD) before dementia, neurodegeneration and/or brain atrophy occur. However, the role of BBB breakdown in neurodegenerative disorders is still not fully understood. Here, we examine BBB breakdown in animal models frequently used to study the pathophysiology of AD, including transgenic mice expressing human amyloid-β precursor protein, presenilin 1, and tau mutations, and apolipoprotein E, the strongest genetic risk factor for AD...
November 6, 2017: Journal of Experimental Medicine
https://www.readbyqxmd.com/read/29054133/effects-of-intrathecal-injection-of-the-conditioned-medium-from-bone-marrow-stromal-cells-on-spinal-cord-injury-in-rats
#19
Kenji Kanekiyo, Tamami Wakabayashi, Norihiko Nakano, Yoshihiro Yamada, Masahiro Tamachi, Yoshihisa Suzuki, Masatoshi Fukushima, Fukuki Saito, Seiya Abe, Chihiro Tsukagoshi, Chimi Miyamoto, Chizuka Ide
Bone marrow stromal cells (BMSCs) have been studied for the treatment of spinal cord injury (SCI). In previous studies, we showed that the transplantation of BMSCs, even though they disappeared from the host spinal cord within 1-3 weeks after transplantation, improved locomotor behaviors and promoted axonal regeneration. This result led to the hypothesis that BMSCs might release some neurotrophic factors effective for the treatment of SCI. The present study examined this by injecting the conditioned medium (CM) of BMSCs to treat SCI in rats...
February 1, 2018: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28987927/blood-brain-barrier-dysfunction-and-recovery-after-ischemic-stroke
#20
REVIEW
Xiaoyan Jiang, Anuska V Andjelkovic, Ling Zhu, Tuo Yang, Michael V L Bennett, Jun Chen, Richard F Keep, Yejie Shi
The blood-brain barrier (BBB) plays a vital role in regulating the trafficking of fluid, solutes and cells at the blood-brain interface and maintaining the homeostatic microenvironment of the CNS. Under pathological conditions, such as ischemic stroke, the BBB can be disrupted, followed by the extravasation of blood components into the brain and compromise of normal neuronal function. This article reviews recent advances in our knowledge of the mechanisms underlying BBB dysfunction and recovery after ischemic stroke...
April 2018: Progress in Neurobiology
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