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Current Neurovascular Research

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https://www.readbyqxmd.com/read/28721811/moving-to-the-rhythm-with-clock-circadian-genes-autophagy-mtor-and-sirt1-in-degenerative-disease-and-cancer
#1
Kenneth Maiese
BACKGROUND: The mammalian circadian clock and its associated clock genes are increasingly be recognized as critical components for a number of physiological and disease processes that extend beyond hormone release, thermal regulation, and sleep-wake cycles. New evidence suggests that clinical behavior disruptions that involve prolonged shift work and even space travel may negatively impact circadian rhythm and lead to multi-system disease. METHODS: In light of the significant role circadian rhythm can hold over the body's normal physiology as well as disease processes, we examined and discussed the impact circadian rhythm and clock genes hold over lifespan, neurodegenerative disorders, and tumorigenesis...
July 17, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28721810/centralized-and-local-color-doppler-ultrasound-reading-agreement-for-diagnosis-of-the-chronic-cerebrospinal-venous-insufficiency-in-patients-with-multiple-sclerosis
#2
Maria Grazia Caprio, Karen Marr, Sirin Gandhi, Dejan Jakimovski, Jesper Hagemeier, Bianca Weinstock-Guttman, Robert Zivadinov, Marcello Mancini
BACKGROUND: An impaired cerebrospinal venous drainage was postulated to be a cofactor in the multifactorial pathogenesis of multiple sclerosis (MS). Chronic cerebrospinal venous insufficiency (CCSVI) is characterized by abnormalities of the main extracranial cerebrospinal venous outflow routes, which can be detected by color Doppler Ultrasound (CDUS) using 5 venous hemodynamic (VH) criteria. Discrepant results between different investigators were reported in the past, therefore the usefulness and applicability of the CCSVI CDUS-based diagnosis in clinical research and practice has been questioned...
July 17, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28721809/acellular-spinal-cord-scaffold-implantation-promotes-vascular-remodeling-with-sustained-delivery-of-vegf-in-a-rat-spinal-cord-hemisection-model
#3
Zi-Xing Xu, Li-Qun Zhang, Chang-Sheng Wang, Rong-Sheng Chen, Gui-Shuang Li, Yu Guo, Wei-Hong Xu
: Background: Promoting angiogenesis provides a possible therapeutic approach in treating spinal cord injury (SCI). Vascular endothelial growth fact (VEGF) is a pro-angiogenic substance that involves in endothelial cell (EC) proliferation, migration, and survival. Exogenous administration of VEGF to the lesion epicenter of the spinal cord has been recently revealed as a potential method for promoting the blood vessel sprouting. METHODS: Spinal cord hemisection in a rat model was established and angiogenesis was studied through implant of an acellular spinal cord scaffold (ASCS) with sustained delivery of VEGF165...
July 17, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28677497/platelets-their-potential-contribution-to-the-generation-of-beta-amyloid-plaques-in-alzheimer-s-disease
#4
Christian Humpel
BACKGROUND: Alzheimer's disease is a severe neurodegenerative brain disorder, showing severe beta-amyloid depositions in the brain (plaques) and in vessels (cerebral amyloid angiopathy, CAA), tau pathology, neurodegeneration (and loss of acetylcholine), inflammation with reactive astrocytes and microglia and cerebrovascular damage, all resulting in memory loss. METHODS AND RESULTS: In this review I present a hypothesis that chronic vascular lesions and bleedings cause platelet overactivation and repair...
July 5, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28637414/hyperfibrinogenemia-and-in-hospital-mortality-in-acute-ischemic-stroke-patients
#5
Shoujiang You, Xiaowei Yin, Huihui Liu, Danni Zheng, Chongke Zhong, Huaping Du, Yu Zhang, Hongru Zhao, Chenhong Qiu, Liangfeng Fan, Shaofang Pei, Zhaoxi Ma, Yongjun Cao, Chun-Feng Liu
BACKGROUND: The impact of hyperfibrinogenemia on short-term outcomes after acute ischemic stroke (AIS) is still not understood. OBJECTIVE: We investigated the association between hyperfibrinogenemia upon hospital admission and the short-term prognosis of acute ischemic stroke (AIS) patients. METHODS: A total of 3,212 AIS patients enrolled from December 2013 to May 2014 across 22 hospitals in Suzhou city were included in the present study. Hyperfibrinogenemia was defined as having a serum fibrinogen>4...
June 21, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28637413/early-phase-18f-av-45-pet-imaging-can-detect-crossed-cerebellar-diaschisis-following-carotid-artery-stenosis-and-cerebral-hypoperfusion
#6
Tsong-Hai Lee, Kuo-Lun Huang, Ting-Yu Chang, Meng-Yang Ho, Shiaw-Pyng Wey, Chia-Ju Hsieh, Tzu-Chen Yen, Kun-Ju Lin, Ing-Tsung Hsiao
Background Carotid artery stenosis (CAS) may induce cerebral hypoperfusion. Early-phase 18F-Florbetapir (AV-45/Amyvid, 18F-AV-45) positron emission tomography (PET) imaging can provide perfusion-like property (pAV-45) for the estimation of cerebral blood flow (CBF). Supra-tentorial lesions may cause decreased blood flow and metabolism in the contralateral cerebellum known as crossed cerebellar diaschisis (CCD). Objective To study the occurrence of CCD after CAS using pAV-45 PET. Methods Eleven healthy controls and 21 patients with unilateral CAS were studied...
June 21, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28637412/vascular-lesion-thickness-in-the-lenticulostriate-artery-region-serves-as-a-biomarker-for-early-neurological-deterioration
#7
Yuan Gao, Bo Song, Lu Zhao, Hui Fang, Yan Ji, Quan Yong, Zhengrong Wu, Yuming Xu
Background:Early neurological deterioration (END) was common in single small subcortical infarction (SSSI). Distal type of SSSI (dSSSI) was reported to have a lower risk of END than proximal type of SSSI(pSSSI) in lenticulostriate artery(LSA) territory. However, dSSSIs with different lesion thickness might have different risks of END. Objective:In this prospective cohort study, we aimed to investigate whether dSSSIs visible on ≥3 serial axial diffusion weighted imaging(DWI) slices were also imaging markers for END...
June 21, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28625130/remote-ischemic-conditioning-improves-cognitive-function-during-cerebral-vascular-injury-through-the-induction-of-autophagy
#8
Hongjuan Wang, Qinglin Zhang, Yang Xu, Hetao Bian, Cuiping Si, Zhongrui Yan, Meijia Zhu
BACKGROUND: The most valid model for vascular cognitive impairment (VCI) is the mouse bilateral common carotid artery stenosis (BCAS), whose behavioral outcomes is supposedly affected by the remote ischemic conditioning (RIC) through the induction of autophgy. We hope to determine whether RIC contributes to the neuroprotection through the induction of autophagy.. METHODS: Wastar male mice were randomized into three groups including the Sham, the BCAS and the RIC+BCAS groups...
June 18, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28625129/triamcinolone-acetonide-suppresses-inflammation-and-facilitates-vascular-barrier-function-in-human-retinal-microvascular-endothelial-cells
#9
Shunsuke Imai, Tomohiro Otsuka, Akira Naito, Masamitsu Shimazawa, Hideaki Hara
BACKGROUND: Diabetic macular edema (DME) is resulted from the retinal microvascular leakage that accompanies the breakdown of blood-retinal barrier. Triamcinolone acetonide (TA) is a therapeutic agent for DME, but since the detailed mechanism of action of TA is not known, part of its action was examined. METHODS: In vitro model to enhance the permeability of human retinal microvascular endothelial cells (HRMECs) was constructed by using DME-related cytokines such as vascular endothelial growth factor (VEGF), tumor necrosis factor-α (TNF-α), and interleukin-1β (IL-1β)...
June 18, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28625128/the-wnt-%C3%AE-catenin-signalling-pathway-inhibitor-sclerostin-is-a-biomarker-for-early-atherosclerosis-in-obesity
#10
Djordje S Popovic, Milena Mitrovic, Dragana Tomic-Naglic, Tijana Icin, Ivana Bajkin, Bojan Vukovic, Damir Benc, Zeljko Zivanovic, Branka Kovacev-Zavisic, Edita Stokic
BACKGROUND: Sclerostin is an inhibitor of the wingless-type mouse mammary tumor virus integration site family/β-catenin signalling pathway (WβcSP), which plays an important role in bone metabolism and in vascular biology. It could act protective regarding atherosclerosis development through its effect on WβcSP in vascular cells. Nevertheless, results of studies analyzing association between circulating sclerostin level (CSL) and atherosclerotic diseases (AD) are showing conflicting results...
June 18, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28625127/the-hippocampal-autophagic-machinery-is-depressed-in-the-absence-of-the-circadian-clock-protein-per1-that-may-lead-to-vulnerability-during-cerebral-ischemia
#11
Abdelhaq Rami, Oliver Rawashdeh
BACKGROUND: Autophagy is an intracellular bulk self-degrading process in which cytoplasmic contents of abnormal proteins and excess or damaged organelles are sequestered into autophagosomes, and degraded upon fusion with lysosomes. Although autophagy is generally considered to be pro-survival, it also functions in cell death processes. We recently reported on the hippocampal higher vulnerability to cerebral ischemia in mice lacking the circadian clock protein PERIOD1 (PER1), a phenomenon we found to be linked to a PER1-dependent modulation of the expression patterns of apoptotic/autophagic markers...
June 18, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28625126/enhanced-risk-for-specific-somatic-myeloproliferative-neoplastic-mutations-in-patients-with-stroke
#12
Chih-Cheng Chen, Chia-Chen Hsu, Cih-En Huang, Yi-Yang Chen, Jrhau Lung, Hsing-Ying Ho, Chian-Pei Li, Jiann-Der Lee
BACKGROUND: Somatic mutations of Janus kinase 2 (JAK2V617F), calreticulin (CALR), and myeloproliferative leukemia virus oncogene (MPL) are the major clonal molecules that drive the pathogenesis of myeloproliferative neoplasms (MPN). It is well recognized that MPN patients carry an excessive risk of thrombohemorrhagic complications. However, little is known about the prevalence of these clonal markers in patients with cerebral vascular disease. METHODS: To address this issue, 153 consecutive stroke patients in Taiwan were enrolled in the study...
June 18, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28412909/prolonged-perfusion-predicts-recurrent-ischemic-stroke-but-not-transient-ischemic-attack-in-patients-with-symptomatic-intracranial-stenosis
#13
Linfang Lan, Xinyi Leng, Vincent Ip, Thomas Leung, Yannie Soo, Jill Abrigo, Ka Sing Wong
BACKGROUND: Intracranial arterial stenosis (ICAS) is the dominant cause for ischemic stroke worldwide, with hemodynamic compromise as a crucial contributor. Prolonged perfusion is commonly observed in ICAS patients on CT perfusion (CTP) maps, while the clinical significance of this perfusion pattern has not been elucidated. METHODS: Patients having symptomatic ICAS of 50-99% stenosis with sustained downstream cerebral blood flow (CBF) were enrolled into this study...
April 13, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28393703/mir-106a-is-associated-with-diabetic-peripheral-neuropathy-through-the-regulation-of-12-15-lox-mediated-oxidative-nitrative-stress
#14
Yuanbo Wu, Dandan Xu, Xiang Zhu, Guangwei Yang, Mingshan Ren
BACKGROUND: Diabetic peripheral neuropathy (DPN) is a common complication of diabetes that with a complex pathogenesis. Study has reported that oxidative stress and nitrative stress were all involved in the DPN, however, the mechanism between them was still unclear. In the present study, we investigated whether miR-106a signaling regulated 12/15-Lipoxygenase (12/15-LOX) on oxidative/nitrative stress in DPN. METHODS: Dorsal root ganglion (DRG) was isolated from 10 healthy mice and 10 DPN mice...
April 4, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28393702/trem2-and-the-progression-of-alzheimer-s-disease
#15
Li Gao, Teng Jiang, Xiaoying Yao, Ling Yu, Xiaolan Yang, Yansheng Li
Alzheimer's disease (AD) is the most common form of dementia, which has been currently considered as a genetically complex disorder caused by a combination of environmental and genetic risk factors. Previous studies have reported that triggering receptor expressed on myeloid cells 2 (TREM2) gene represents a promising candidate gene for AD susceptibility and progression. Interestingly, recent findings further suggested that the association between TREM2 variants and AD risk was quite diverse among different ethnicities and populations...
April 4, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28356003/young-stroke-patients-treated-with-intravenous-thrombolysis-have-a-more-favorable-outcome-and-mortality-compared-with-older-patients
#16
Jijun Shi, Yongjun Cao, Shoujiang You, Zhichao Huang, Xia Zhang, Huihui Liu, Chun-Feng Liu
BACKGROUND: Previous clinical studies suggest that intravenous thrombolysis (IVT) with recombinant tissue plasminogen activator benefits stroke patients, but the efficacy of IVT in young stroke patients is not well-studied in China. OBJECTIVE: We compared the safety and efficacy of IVT with recombinant tissue plasminogen activator between Chinese young stroke patients (18-50 years old) and older patients (51-80 years old). METHODS: We analyzed data from the Soochow Stroke Registry for 373 stroke patients (18-50 years, n=74 vs...
March 27, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28356002/prognostic-parameters-for-symptomatic-intracranial-hemorrhage-after-intravenous-thrombolysis-in-acute-ischemic-stroke-in-an-asian-population
#17
Thanin Lokeskrawee, Sombat Muengtaweepongsa, Jayanton Patumanond, Somsak Tiamkao, Thanoot Thamangraksat, Phanyarat Phankhian, Polchai Pleumpanupatand, Paworamon Sribussara, Teeraparp Kitjavijit, Anake Supap, Weerawan Rattanaphibool, Jariya Prisiri
Symptomatic intracranial hemorrhage (sICH) is a major complication after intravenous thrombolysis leading to severe disability and death. The incidence was higher in Asian than in westernized countries. Prognostic factors across ethnicities are presumably different. Studies in Asian populations are limited. Clinical data from January 2008 to September 2016 in one provincial and four regional hospitals in the northern part of Thailand were retrospectively reviewed. Patients were those with acute ischemic stroke, to whom recombinant tissue plasminogen activator (rt-PA) had been prescribed...
March 27, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28356001/atomoxetine-protects-against-nmda-receptor-mediated-hippocampal-neuronal-death-following-transient-global-cerebral-ischemia
#18
Joon Ha Park, Yang Hee Kim, Ji Hyeon Ahn, Soo Young Choi, Seongkweon Hong, Sung Koo Kim, Il Jun Kang, Young-Myeong Kim, Tae-Kyeong Lee, Moo-Ho Won, Choong-Hyun Lee
BACKGROUND: Atomoxetine has been widely used for the treatment of attention-deficit/hyperactivity disorder. ATX has additional abilities such as antagonistic effects on the N-methyl-D-aspartate receptors (NMDARs) and benefit effects in some animal models of neurological disorders. However, there were few studies regarding protective effects and related mechanisms of ATX against cerebral ischemic insults. OBJECTIVE: The objective of this study is to investigate neuroprotection of ATX pretreatment and its mechanisms in the hippocampal cornu ammonis 1 (CA1) region following transient global cerebral ischemia in gerbils...
March 27, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28294065/tetramethylpyrazine-facilitates-functional-recovery-after-spinal-cord-injury-by-inhibiting-mmp2-mmp9-and-vascular-endothelial-cell-apoptosis
#19
Jian-Zhong Hu, Xiao-Kai Wang, Yong Cao, Dong-Zhe Li, Tian-Ding Wu, Tao Zhang, Da-Qi Xu, Hong-Bin Lu
BACKGROUND: Spinal cord injury (SCI) is a major public health issue that leads to neurological dysfunctions and morbidities in patients. Tetramethylpyrazine (TMP) plays a neuroprotective role in SCI; however, the underlying mechanism has not been fully elucidated. Objective In the present study, we aimed to investigate the mechanisms and therapeutic effects of TMP on SCI. METHODS: A contusion SCI model was established that used a modified Allen's method. In the TMP group, TMP (200 mg/kg) was injected daily for 5 days post-injury, while in the Negative Control (NC) group, an equal volume of normal saline was injected...
March 13, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28294064/knockdown-of-c-c-chemokine-receptor-5-ccr5-is-protective-against-cerebral-ischemia-and-reperfusion-injury
#20
Edna Constanza Gómez Victoria, Eliana Cristina de Brito Toscano, Ana Clara de Sousa Cardoso, Daniele Gonçalves da Silva, Aline Silva de Miranda, Lucíola da Silva Barcelos, Michelle Adriane Sugimoto, Lirlândia Pires Sousa, Isabel Vieira de Assis Lima, Antônio Carlos Pinheiro de Oliveira, Fátima Brant, Fabiana Simão Machado, Mauro Martins Teixeira, Antônio Lúcio Teixeira, Milene Alvarenga Rachid
BACKGROUND: Stroke is the second leading cause of death and a major cause of disability of adults worldwide. Inflammatory processes are known to contribute to the pathophysiology of cerebral ischemia, especially following reperfusion. Chemokines and their receptors are involved in migration of leukocytes and have been implicated in pathogenesis of ischemic stroke. OBJECTIVE: In the present study, we investigated the effects of C-C chemokine receptor type 5 (CCR5) deficiency on neurological outcome, brain damage and expression of pro-inflammatory chemokines: chemokine (C-X-C motif) ligand 1 (CXCL1), chemokine (CC motif) ligand 3 (CCL3) and chemokine (C-C motif) ligand 5 (CCL5), and the brain-derived neurotrophic factor (BDNF)...
March 13, 2017: Current Neurovascular Research
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