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https://www.readbyqxmd.com/read/30024618/protective-effects-of-8-mop-on-blood-brain-barrier-via-the-nrf-2-ho-1-pathway-in-mice-model-of-cerebral-infarction
#1
C Liu, L Zhong, X-L Tian, Y-C Han
OBJECTIVE: To explore the effect of 8-MOP on the blood-brain barrier in mice model of cerebral infarction and the underlying mechanism. MATERIALS AND METHODS: Middle cerebral artery occlusion (MCAO) model was established to induce permanent cerebral infarction. The neurological function was observed and scored by the modified longa score method after model establishment. Besides, the water content of brain tissue was measured by the standard dry weight method. Evans blue exudation rate was used to evaluate the effect of 8-MOP on the permeability of the blood-brain barrier...
July 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/30018671/mst1-suppression-reduces-early-brain-injury-by-inhibiting-the-nf-%C3%AE%C2%BA-b-mmp-9-pathway-after-subarachnoid-hemorrhage-in-mice
#2
Jie Qu, Hengli Zhao, Qiang Li, Pengyu Pan, Kang Ma, Xin Liu, Hua Feng, Yujie Chen
Background: Mammalian sterile 20-like kinase 1 (MST1), the key component of the Hippo-YAP pathway, exhibits an important role in the pathophysiological process of various neurological disorders, including ischemic stroke and spinal cord injury. However, during subarachnoid hemorrhage, the involvement of MST1 in the pathophysiology of early brain injury remains unknown. Methods: We employed intravascular filament perforation to establish the subarachnoid hemorrhage (SAH) mouse model...
2018: Behavioural Neurology
https://www.readbyqxmd.com/read/29997094/-icariin-alleviates-lipid-peroxidation-after-spinal-cord-injury-in-rats
#3
Xian-Sheng Ren, Wei Ding, Xiao-Yu Yang
OBJECTIVE: To assess the effects of intragastric administration of icariin on lipid peroxidation after spinal cord injury in rats. METHODS: Seventy-two healthy adult male SD rats were randomized equally into icariin group, control group and sham-operated group. In the control and icariin groups, spinal cord injury was induced using modified Allen's method, and the rats in the sham-operated group underwent laminotomy without damaging the spinal cord. Immediately after the surgery, the rats in icariin group were subjected to intragastric administration of icariin (100 mg/kg), and those in the control and sham-operated groups received an equal volume of saline in the same manner once a day...
June 20, 2018: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/29985239/quetiapine-protects-the-blood-brain-barrier-in-traumatic-brain-injury
#4
Bobby Darnell Robinson, Claire Larson Isbell, Chinchusha Anasooya Shaji, Stanley Kurek, Justin L Regner, Binu Tharakan
BACKGROUND: The integrity of the blood-brain barrier (BBB) is paramount in limiting vasogenic edema following traumatic brain injury (TBI). The purpose of this study was to ascertain if quetiapine, an atypical antipsychotic commonly used in trauma/critical care for delirium, protects the BBB and attenuates hyperpermeability in TBI. METHOD: The effect of quetiapine on hyperpermeability was examined through molecular modeling, cellular models in vitro and small animal models in vivo...
July 5, 2018: Journal of Trauma and Acute Care Surgery
https://www.readbyqxmd.com/read/29974381/levo-tetrahydropalmatine-attenuates-neuron-apoptosis-induced-by-cerebral-ischemia-reperfusion-injury-involvement-of-c-abl-activation
#5
Ruoxi Sun, Yichen Song, Shanshan Li, Zhanqiang Ma, Xueyang Deng, Qiang Fu, Rong Qu, Shiping Ma
Ischemic stroke is one of the most dangerous acute diseases which causes death or deformity. Apoptosis has been shown to play an important role in the development and pathogenesis of cerebral ischemia-reperfusion injury (I/R injury), but the related mechanism is unclear. Levo-tetrahydropalmatine (L-THP), a bioactive ingredient extracted from the Chinese herb Corydalis, can penetrate the blood-brain barrier and exert various pharmacological effects on neural tissues. The present study examined the neuroprotective effect of L-THP on neuronal apoptosis induced by cerebral I/R injury...
July 4, 2018: Journal of Molecular Neuroscience: MN
https://www.readbyqxmd.com/read/29966831/mir-155-deletion-reduces-ischemia-induced-paralysis-in-an-aortic-aneurysm-repair-mouse-model-utility-of-immunohistochemistry-and-histopathology-in-understanding-etiology-of-spinal-cord-paralysis
#6
Hamdy Awad, Anna Bratasz, Gerard Nuovo, Richard Burry, Xiaomei Meng, Hesham Kelani, Melissa Brown, Mohamed E Ramadan, Jim Williams, Lamia Bouhliqah, Phillip G Popovich, Zhen Guan, Cynthia Mcallister, Sarah E Corcoran, Brian Kaspar, D Michele Basso, José J Otero, Claudia Kirsch, Ian C Davis, Carlo Maria Croce, Jean-Jacques Michaille, Esmerina Tili
Spinal cord paralysis is relatively common after surgical repair of thoraco-abdominal aortic aneurysm (TAAA) and its etiology is unknown. The present study was designed to examine the histopathology of the disease and investigate whether miR-155 ablation would reduce spinal cord ischemic damage and delayed hindlimb paralysis induced by aortic cross-clamping (ACC) in our mouse model. The loss of locomotor function in ACC-paralyzed mice correlated with the presence of extensive gray matter damage and central cord edema, with minimal white matter histopathology...
June 18, 2018: Annals of Diagnostic Pathology
https://www.readbyqxmd.com/read/29942452/does-inhibition-of-angiotensin-function-cause-neuroprotection-in-diffuse-traumatic-brain-injury
#7
Mohammad Khaksari, Mohammad Amin Rajizadeh, Mohammad Abbas Bejeshk, Zahra Soltani, Sina Motamedi, Fatemeh Moramdi, Masoud Islami, Shahriyar Shafa, Sepehr Khosravi
Objectives: Neuroprotection is created following the inhibition of angiotensin II type 1 receptor (AT1R). Therefore, the purpose of this research was examining AT1R blockage by candesartan in diffuse traumatic brain injury (TBI). Materials and Methods: Male rats were assigned into sham, TBI, vehicle, and candesartan groups. Candesartan (0.3 mg/kg) or vehicle was administered IP, 30 min post-TBI. Brain water and Evans blue contents were determined, 24 and 5 hr after TBI, respectively...
June 2018: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/29935233/adenoviral-vector-induced-silencing-of-rgma-attenuates-blood-brain-barrier-dysfunction-in-a-rat-model-of-mcao-reperfusion
#8
Min Li, Yuetao Wen, Rongrong Zhang, Fei Xie, Gang Zhang, Xinyue Qin
BACKGROUND: Repulsive guidance molecule A (RGMa) is implicated in focal cerebral ischemia-reperfusion (I/R) injury, but its mechanisms are still largely unknown. This work focused on the effects of RGMa on the blood-brain barrier (BBB) after focal cerebral I/R injury. METHODS: Sprague-Dawley (SD) rats were randomly divided into four groups: sham, middle cerebral artery occlusion (MCAO)/reperfusion (I/R), MCAO/reperfusion administered recombinant adenovirus expressing sh-con (I/R + sh-con) and MCAO/reperfusion administered recombinant adenovirus expressing sh-RGMa (I/R + sh-RGMa) groups...
June 20, 2018: Brain Research Bulletin
https://www.readbyqxmd.com/read/29935198/refinement-of-embolic-stroke-model-in-rats-effect-of-post-embolization-anesthesia-duration-on-arterial-blood-pressure-cerebral-edema-and-mortality
#9
Bryan T C Chuang, Xiaoguang Liu, Alexander J Lundberg, Tommy J K Toung, John A Ulatowski, Raymond C Koehler
BACKGROUND: Injection of a clot into the internal carotid artery is an experimental model of ischemic stroke that is considered to closely mimic embolic stroke in humans. In this model, the common carotid artery typically remains temporarily occluded to permit time for stabilization of the clot in the middle cerebral artery. However, the associated lengthening of the anesthesia duration could affect arterial blood pressure and stroke outcome. NEW METHOD: We refined the model by examining how increasing isoflurane anesthesia duration from 30 to 60 min after clot embolization affects mortality, infarct volume, edema, blood-brain barrier permeability, and the 8-h post-ischemic time course of blood pressure, which has not been reported previously in this model...
June 20, 2018: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29935189/ultrastructural-and-biochemical-features-of-cerebral-microvessels-of-adult-rat-subjected-to-a-low-dose-of-silver-nanoparticles
#10
Beata Dąbrowska-Bouta, Grzegorz Sulkowski, Małgorzata Frontczak-Baniewicz, Joanna Skalska, Mikołaj Sałek, Jolanta Orzelska-Górka, Lidia Strużyńska
The widespread use of silver nanoparticles (AgNPs) in medicine and in multiple commercial products has motivated researchers to investigate their potentially hazardous effects in organisms. Since AgNPs may easily enter the brain through the blood-brain barrier (BBB), characterization of their interactions with cellular components of the neurovascular unit (NVU) is of particular importance. Therefore, in an animal model of prolonged low-dose exposure, we investigate the extent and mechanisms of influence of AgNPs on cerebral microvessels...
June 20, 2018: Toxicology
https://www.readbyqxmd.com/read/29928110/theaflavin-alleviates-inflammatory-response-and-brain-injury-induced-by-cerebral-hemorrhage-via-inhibiting-the-nuclear-transcription-factor-kappa-%C3%AE-related-pathway-in-rats
#11
Guanglei Fu, Hua Wang, Youli Cai, Hui Zhao, Wenjun Fu
Objective: Intracerebral hemorrhage (ICH) is one of the most common acute cerebrovascular diseases with high mortality. Numerous studies have shown that inflammatory response played an important role in ICH-induced brain injury. Theaflavin (TF) extracted from black tea has various biological functions including anti-inflammatory activity. In this study, we investigated whether TF could inhibit ICH-induced inflammatory response in rats and explored its mechanism. Materials and methods: ICH rat models were induced with type VII collagenase and pretreated with TF by gavage in different doses (25 mg/kg-100 mg/kg)...
2018: Drug Design, Development and Therapy
https://www.readbyqxmd.com/read/29916544/yc%C3%A2-1-reduces-inflammatory-responses-by-inhibiting-nuclear-factor%C3%A2-%C3%AE%C2%BAb-translocation-in-mice-subjected-to-transient-focal-cerebral-ischemia
#12
Wei-Ting Lee, Shih-Huang Tai, Yu-Wen Lin, Tian-Shung Wu, E-Jian Lee
3‑(5‑hydroxymethyl‑2‑furyl)‑1‑benzyl‑indazole (YC‑1) is understood to protect against ischemic stroke, but the molecular basis for its neuroprotection remains to be fully characterized. The present study investigated the influence of YC‑1 on inflammatory responses following experimental stroke. Previous studies indicated that nuclear factor (NF)‑κB‑driven signals serve a pivotal role in mediating inflammatory responses following stroke. Ischemic stroke results in activation of NF‑κB to induce gene expression of factors including inducible nitric oxide synthase, interleukin (IL)‑1β, IL‑6 and matrix metalloproteinases (MMPs)...
June 15, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29910744/yangxue-qingnao-wan-and-silibinin-capsules-the-two-chinese-medicines-attenuate-cognitive-impairment-in-aged-ldlr-golden-syrian-hamsters-involving-protection-of-blood-brain-barrier
#13
You-Yu Gu, Ping Huang, Quan Li, Yu-Ying Liu, George Liu, Yu-Hui Wang, Ming Yi, Li Yan, Xiao-Hong Wei, Lei Yang, Bai-He Hu, Xin-Rong Zhao, Xin Chang, Kai Sun, Chun-Shui Pan, Yuan-Chen Cui, Qing-Fang Chen, Chuan-She Wang, Jing-Yu Fan, Zhi-Zhong Ma, Jing-Yan Han
The purpose of the study was to explore the effect and the underlying mechanism of YangXue QingNao Wan (YXQNW) and Silibinin Capsules (SC), the two Chinese medicines, on cognitive impairment in older people with familial hyperlipidaemia. Fourteen month-old female LDLR (+/-) golden Syrian hamsters were used with their wild type as control. YXQNW (0.5 g/kg/day), SC (0.1 g/kg/day), or YXQNW (0.5 g/kg/day) + SC (0.1 g/kg/day) were administrated orally for 30 days. To assess the effects of the two drugs on plasma lipid content and cognitive ability, plasma TC, TG, LDL-C, and HDL-C were measured, and Y maze task was carried out both before and after administration...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29905889/thioredoxin-interacting-protein-mediates-mitochondrion-dependent-apoptosis-in-early-brain-injury-after-subarachnoid-hemorrhage
#14
Yidan Liang, Xudong Che, Qing Zhao, Rami Darwazeh, Hongxia Zhang, Dengzhi Jiang, Jun Zhao, Xiang Xiang, Wang Qin, Liu Liu, Zhaohui He
Early brain injury (EBI) was reported to be the primary cause of high mortality and poor outcomes in subarachnoid hemorrhage (SAH) patients, and apoptosis is regarded as the most important physiopathologic mechanism during EBI. Recently, our team found that thioredoxin-interacting protein (TXNIP) links endoplasmic reticulum stress (ER stress) to neuronal apoptosis and aggravates EBI. However, the other underlying mechanisms remain unknown. Mitochondria are considered to be the central points in integrating apoptotic cell death...
June 15, 2018: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/29896083/annexin-a7-levels-increase-in-rats-with-traumatic-brain-injury-and-promote-secondary-brain-injury
#15
Fan Gao, Di Li, Qin Rui, Haibo Ni, Huixiang Liu, Feng Jiang, Li Tao, Rong Gao, Baoqi Dang
The incidence of traumatic brain injury (TBI) has been increasing annually. Annexin A7 is a calcium-dependent phospholipid binding protein. It can promote melting of the cell membrane. Recent studies have shown that it plays an important role in atherosclerosis, other cardiovascular diseases, and a variety of tumors. However, few studies of ANXA7 in TBI have been performed. We here observed how ANXA7 changes after TBI and discuss whether brain injury is associated with the use of ANXA7 antagonist intervention...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29895352/direct-comparison-of-the-thioacetamide-and-azoxymethane-models-of-type-a-hepatic-encephalopathy-in-mice
#16
Stephanie Grant, Matthew McMillin, Gabriel Frampton, Anca D Petrescu, Elaina Williams, Victoria Jaeger, Jessica Kain, Sharon DeMorrow
Acute liver failure is a devastating consequence of hepatotoxic liver injury that can lead to the development of hepatic encephalopathy. There is no consensus on the best model to represent these syndromes in mice and therefore the aim of this study was to classify hepatic and neurological consequences of azoxymethane- and thioacetamide-induced liver injury. Azoxymethane-treated mice were euthanized at time points representing absence of, minor and significant stages of neurological decline. Thioacetamidetreated mice had tissue collected at up to 3 days following daily injections...
June 12, 2018: Gene Expression
https://www.readbyqxmd.com/read/29893407/long-noncoding-ribonucleic-acid-nkila-induces-the-endoplasmic-reticulum-stress-autophagy-pathway-and-inhibits-the-nuclear-factor-k-gene-binding-pathway-in-rats-after-intracerebral-hemorrhage
#17
Jiaoying Jia, Mingming Zhang, Qi Li, Qian Zhou, Yugang Jiang
Long noncoding RNAs (lncRNAs) have emerged as an important class of molecules that have been associated with brain function and neurological disease, but the expression profiles of lncRNAs after intracerebral hemorrhage (ICH) remain to be elucidated. In this study, we determined the expression pattern of nuclear factor-k-gene binding (NF-kB) interacting lncRNA (NKILA) after ICH and examined its respective effects on the endoplasmic reticulum stress (ERS)/autophagy pathway, hippocampal neuron loss, and the NF-kB pathway after type VII collagenase-induced ICH in rats...
June 12, 2018: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/29886252/the-pathological-role-of-nlrs-and-aim2-inflammasome-mediated-pyroptosis-in-damaged-blood-brain-barrier-after-traumatic-brain-injury
#18
Xintong Ge, Wenzhu Li, Shan Huang, Zhenyu Yin, Xin Xu, Fanglian Chen, Xiaodong Kong, Haichen Wang, Jianning Zhang, Ping Lei
Pyroptosis is a highly specific type of inflammatory programmed cell death that different from necrosis or apoptosis. It is initiated by cellular detection of acute damage via recognizing pathogen-associated molecular patterns (PAMPs) by NOD-like receptors (NLRs) or AIM2-like receptor (AIM2). NLRs and AIM2 could trigger the formation of a multi-protein complex, known as inflammasome. It also contains apoptotic speck-containing protein (ASC) and pro-Caspase-1, and could process the signals to induce a cascade of inflammatory response...
June 7, 2018: Brain Research
https://www.readbyqxmd.com/read/29886251/a-cannabinoid-receptor-2-agonist-reduces-blood-brain-barrier-damage-via-induction-of-mkp-1-after-intracerebral-hemorrhage-in-rats
#19
Lin Li, Debo Yun, Yuan Zhang, Yihao Tao, Qiang Tan, Fei Qiao, Bo Luo, Yi Liu, Runjin Fan, Jishu Xian, Anyong Yu
BACKGROUND AND PURPOSE: The blood-brain barrier (BBB) disruption and the following development of brain edema, is the most life-threatening secondary injury after intracerebral hemorrhage (ICH). This study is to investigate a potential role and mechanism of JWH133, a selected cannabinoid receptor type2 (CB2R) agonist, on protecting blood-brain barrier integrity after ICH. METHODS: 192 adult male Sprague-Dawley (SD) rats were randomly divided into Sham; ICH+Vehicle; ICH+JWH 1...
June 7, 2018: Brain Research
https://www.readbyqxmd.com/read/29883817/manf-prevents-traumatic-brain-injury-in-rats-by-inhibiting-inflammatory-activation-and-protecting-blood-brain-barrier
#20
Qing-Xin Li, Yu-Xian Shen, Akhlaq Ahmad, Yu-Jun Shen, Yi-Quan Zhang, Pei-Kun Xu, Wei-Wei Chen, Yong-Qiang Yu
BACKGROUND: Our previous studies have shown that MANF provides neuroprotective effect against ischemia/reperfusion injury and is also involved in inflammatory disease models. This work investigates the potential role and mechanism of MANF in acute brain damage after traumatic brain injury (TBI). METHODS: The model of TBI was induced by Feeney free falling methods with male Sprauge-Dawley rats. The expression of MANF, 24 hrs after TBI, was detected by the immunohistochemistry, immunofluorescence, Western blot and Reverse transcription PCR(RT-PCR) techniques...
June 5, 2018: World Neurosurgery
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