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https://www.readbyqxmd.com/read/29333917/role-of-cortical-microbleeds-in-cognitive-impairment-in%C3%A2-vivo-behavioral-and-imaging-characterization-of-a-novel-murine-model
#1
Sandrine Bergeron, Yaohua Chen, Florent Auger, Julie Deguil, Nicolas Durieux, Emilie Skrobala, Romain Barus, Camille Potey, Charlotte Cordonnier, Florence Pasquier, Laura Ravasi, Régis Bordet, Sophie Gautier
Cerebral microbleeds (CMBs) could contribute to cognitive impairment in the general population and in patients with dementia. We designed a study to (i) develop a murine model of CMBs, (ii) assess whether CMBs affect cognition in this model and (iii) assess whether this model is sensitive to pharmacological modulation. Male C57Bl6/J mice were stereotactically administered collagenase to induce cortical lesion analysed by MRI at 24 h. CMB-mice were assessed at six weeks post-lesion for cognitive performances (Barnes maze and Touchscreen automated paired-associated learning (PAL) task) and for cerebral metabolism (in vivo PET/CT with fluorodeoxyglucose (FDG))...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29286334/a-single-neonatal-exposure-to-bmaa-in-a-rat-model-produces-neuropathology-consistent-with-neurodegenerative-diseases
#2
Laura Louise Scott, Timothy Grant Downing
Although cyanobacterial β-N-methylamino-l-alanine (BMAA) has been implicated in the development of Alzheimer's Disease (AD), Parkinson's Disease (PD) and Amyotrophic Lateral Sclerosis (ALS), no BMAA animal model has reproduced all the neuropathology typically associated with these neurodegenerative diseases. We present here a neonatal BMAA model that causes β-amyloid deposition, neurofibrillary tangles of hyper-phosphorylated tau, TDP-43 inclusions, Lewy bodies, microbleeds and microgliosis as well as severe neuronal loss in the hippocampus, striatum, substantia nigra pars compacta, and ventral horn of the spinal cord in rats following a single BMAA exposure...
December 29, 2017: Toxins
https://www.readbyqxmd.com/read/29282815/prevalence-of-and-risk-factors-for-cerebral-microbleeds-among-adult-patients-with-haemophilia-a-or-b
#3
H Husseinzadeh, T Chiasakul, P A Gimotty, B Pukenas, R Wolf, M Kelty, E Chiang, P F Fogarty, A Cuker
INTRODUCTION: Cerebral microbleeds (CMBs) represent clinically silent haemorrhagic events. Cerebral microbleeds (CMBs) portend negative neurovascular and cognitive outcomes in the general population and are associated with cognitive impairment in persons with haemophilia (PWH). Prevalence, patterns, and risk factors for CMBs in PWH have not been directly compared to persons without coagulopathy. AIM: To examine prevalence, patterns, and risk factors for CMBs in PWH vs normal controls...
December 28, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/29282347/-a-case-of-kanji-agraphia-resulting-from-intracerebral-hemorrhage-on-the-left-temporal-lobe-associated-with-multiple-dural-arteriovenous-fistulas
#4
Sakura Kurosu, Yasunobu Nakai, Satoshi Yamada, Tomoko Chujo, Etsuko Mori, Junzo Nakao, Kazuya Uemura
A 60-year-old, right-handed man suffered from mild word finding difficulties and kanji agraphia. Brain computed tomography revealed left temporal lobe hemorrhage, and cerebral angiogram revealed multiple dural arteriovenous fistulas (d-AVFs) in the left anterior cranial fossa and middle cranial fossa. Surgical shunt ablation was performed, and the lesions were obliterated completely. Analysis of the kanji agraphia during neuropsychological rehabilitation showed similar symptoms to those of the left posterior inferior temporal lobe lesion...
December 2017: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/29279021/increased-myo-inositol-in-primary-motor-cortex-of-contact-sport-athletes-without-a-history-of-concussion
#5
Genevieve Lefebvre, Emilie Chamard, Sebastien Proulx, Sara Tremblay, Mark Halko, Salil Soman, Elaine de Guise, Alvaro Pascual-Leone, Hugo Theoret
OBJECTIVE: Determine whether repetitive hits to the head at a subclinical level are associated with structural and functional brain abnormalities and if these effects are influenced by high levels of fitness associated with intense physical activity. METHODS: Seventy-two college students were recruited: 24 non-athletes, 24 athletes practicing a varsity contact sport, and 24 athletes practicing a varsity non-contact sport. They were recruited for a neuropsychological evaluation and a magnetic resonance imaging session that included magnetic resonance spectroscopy of primary motor cortex (M1) and prefrontal cortex and susceptibility-weighted imaging...
December 26, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/29260032/longitudinal-clinical-and-neuro-radiological-findings-in-a-patient-with-leukoencephalopathy-with-brain-calcifications-and-cysts-labrune-syndrome
#6
Yasushi Iwasaki, Ken-Ichiro Hoshino, Keiko Mori, Masumi Ito, Yoshinari Kawai, Maya Mimuro, Tamao Tsukie, Takeshi Ikeuchi, Mari Yoshida
Since she was 4 years old, the patient had exhibited frequent convulsive seizures, and she experienced severe headaches and depression in adulthood. At the age of 37 years, cerebral calcifications were detected, but she exhibited no cognitive or motor problems. She suffered a cerebral haemorrhage at 49 years old and experienced cognitive dysfunction, dysarthria, dysphagia, and left-hemiparesis as sequelae. After undergoing gastrostomy, she exhibited very slow cognitive deterioration associated with speech disturbance over more than 10 years...
September 2017: ENeurologicalSci
https://www.readbyqxmd.com/read/29247143/cognitive-impairment-before-intracerebral-hemorrhage-is-associated-with-cerebral-amyloid-angiopathy
#7
Gargi Banerjee, Duncan Wilson, Gareth Ambler, Karen Osei-Bonsu Appiah, Clare Shakeshaft, Surabhika Lunawat, Hannah Cohen, Tarek Yousry, Gregory Y H Lip, Keith W Muir, Martin M Brown, Rustam Al-Shahi Salman, Hans Rolf Jäger, David J Werring
BACKGROUND AND PURPOSE: Although the association between cerebral amyloid angiopathy (CAA) and cognitive impairment is increasingly recognized, it is not clear whether this is because of the impact of recurrent intracerebral hemorrhage (ICH) events, disruptions caused by cerebral small vessel damage, or both. We investigated this by considering whether cognitive impairment before ICH was associated with neuroimaging features of CAA on magnetic resonance imaging. METHODS: We studied 166 patients with neuroimaging-confirmed ICH recruited to a prospective multicentre observational study...
December 15, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29247070/mixed-location-cerebral-hemorrhage-microbleeds-underlying-microangiopathy-and-recurrence-risk
#8
Marco Pasi, Andreas Charidimou, Gregoire Boulouis, Eitan Auriel, Alison Ayres, Kristin M Schwab, Joshua N Goldstein, Jonathan Rosand, Anand Viswanathan, Leonardo Pantoni, Steven M Greenberg, M Edip Gurol
OBJECTIVE: To assess the predominant type of cerebral small vessel disease (SVD) and recurrence risk in patients who present with a combination of lobar and deep intracerebral hemorrhage (ICH)/microbleed locations (mixed ICH). METHODS: Of 391 consecutive patients with primary ICH enrolled in a prospective registry, 75 (19%) had mixed ICH. Their demographics, clinical/laboratory features, and SVD neuroimaging markers were compared to those of 191 patients with probable cerebral amyloid angiopathy (CAA-ICH) and 125 with hypertensive strictly deep microbleeds and ICH (HTN-ICH)...
December 15, 2017: Neurology
https://www.readbyqxmd.com/read/29244126/silent-cerebral-small-vessel-disease-twice-as-prevalent-in-middle-aged-well-controlled-cart-treated-hiv-infected-individuals-than-hiv-uninfected-individuals
#9
Antoine Moulignier, Julien Savatovsky, Lambert Assoumou, François-Xavier Lescure, Cédric Lamirel, Ophelia Godin, Nadia Valin, Roland Tubiana, Ana Canestri, Pascal Roux, Jean-Claude Sadik, Laurence Salomon, Marie Abrivard, Christine Katlama, Yazdan Yazdanpanah, Gilles Pialoux, Pierre-Marie Girard, Dominique Costagliola
Background: Silent cerebral small-vessel disease (CSVD) is defined as white matter hyperintensities, silent brain infarction or microbleeds. CSVD is responsible for future vascular events, cognitive impairment, frailty and shorter survival. CSVD prevalence among middle-aged persons living with well-controlled HIV infection (PLHIVs) is unknown. Methods: ANRS EP51 MicroBREAK (NCT02082574) is a cross-sectional study with prospective enrollment of treated PLHIVs, ≥50 years old with viral load controlled for ≥12 months, and frequency age- and sex-matched HIV-uninfected controls (HUCs)...
December 13, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/29240562/occurrence-of-impaired-physical-performance-in-memory-clinic-patients-with-cerebral-small-vessel-disease
#10
Jurre H Verwer, Geert-Jan Biessels, Rutger Heinen, Lieza G Exalto, Marielle H Emmelot-Vonk, Huiberdina L Koek
Cerebral small vessel disease (CSVD) occurs often in memory clinic patients. Apart from cognitive deficits, these patients can express physical decline, which predicts adverse health outcomes. In this study, we investigated the cooccurrence of clinically relevant impairments in physical performance and CSVD in memory clinic patients. We included 131 patients with vascular brain injury, mild cognitive impairment or Alzheimer disease with available 3T MRI and physical performance scores. CSVD was visually rated according to 3 subtypes and as a total burden score, composed of the presence of white matter hyperintensities (WMH), lacunar infarcts (LI), and cerebral microbleeds (MB)...
December 13, 2017: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/29237799/differential-associations-between-retinal-signs-and-cmbs-by-location-the-ages-reykjavik-study
#11
Chengxuan Qiu, Jie Ding, Sigurdur Sigurdsson, Diana E Fisher, Qian Zhang, Gudny Eiriksdottir, Ronald Klein, Mark A van Buchem, Vilmundur Gudnason, Mary Frances Cotch, Lenore J Launer
OBJECTIVE: To test the hypothesis that age-related macular degeneration (AMD) and retinal microvascular signs are differentially associated with lobar and deep cerebral microbleeds (CMBs). METHODS: CMBs in lobar regions indicate cerebral amyloid angiopathy (CAA). β-Amyloid deposits are implicated in both CAA and AMD. Deep CMBs are associated with hypertension, a major risk factor for retinal microvascular damage. This population-based cohort study included 2,502 participants in the Age, Gene/Environment Susceptibility (AGES)-Reykjavik Study who undertook binocular digital retinal photographs at baseline (2002-2006) to assess retinal microvascular signs and AMD and brain MRI scan at both baseline and follow-up (2007-2011) to assess CMBs...
December 13, 2017: Neurology
https://www.readbyqxmd.com/read/29233158/etiology-of-isolated-pontine-infarctions-a-study-based-on-high-resolution-mri-and-brain-small-vessel-disease-scores
#12
Cheng Xia, Hui-Sheng Chen, Shi-Wen Wu, Wei-Hai Xu
BACKGROUND: In this retrospective study, we investigated the main pathogenesis of the two types of isolated pontine infarction: paramedian pontine infarcts (PPIs) and small deep pontine infarcts (SDPIs). METHODS: Acute ischemic stroke patients, comprising 117 PPI patients and 40 SDPI patients, were enrolled. High-resolution magnetic resonance imaging (HR-MRI) and routine MRI sequences were performed for each patient, and clinical data were collected. The following brain small vessel disease (SVD) features of the MRI scans were each rated (0 or 1) separately: asymptomatic lacunar infarcts, white matter lesions (WMLs), deep and infratentorial cerebral microbleeds (CMBs), and enlarged perivascular spaces in the basal ganglia...
December 12, 2017: BMC Neurology
https://www.readbyqxmd.com/read/29232251/are-the-brain-s-vascular-and-alzheimer-pathologies-additive-or-interactive
#13
Rebecca Koncz, Perminder Sachdev
PURPOSE OF REVIEW: Alzheimer's disease and cerebrovascular disease (CVD) commonly co-occur. Whether CVD promotes the progression of Alzheimer's disease pathology remains a source of great interest. Recent technological developments have enabled us to examine their inter-relationship using quantifiable, biomarker-based approaches. We provide an overview of advances in understanding the relationship between vascular and Alzheimer's disease pathologies, with particular emphasis on β-amyloid and tau as measured by positron emission tomography and cerebrospinal fluid (CSF) concentration, and magnetic resonance imaging markers of small vessel disease (SVD)...
December 9, 2017: Current Opinion in Psychiatry
https://www.readbyqxmd.com/read/29222944/cerebral-microbleeds-an-mri-review-of-common-and-less-common-causes
#14
REVIEW
Dimitri Renard
Cerebral microbleeds (CMB) are small foci of (acute, subacute, or chronic) blood products, best seen using MRI techniques sensitive to iron deposits (i.e. gradient-echo T2*-weighted and susceptibility-weighted imaging), frequently encountered in small vessel disease (SVD, with hypertensive vasculopathy and cerebral amyloid angiopathy as most frequent conditions) and also in other disorders. In this review, we will mainly discuss the MRI characteristics of CMB and the associated MRI abnormalities encountered in common and less common SVD and non-SVD conditions...
December 9, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29217662/long-term-prognostic-implications-of-cerebral-microbleeds-in-chinese-patients-with-ischemic-stroke
#15
Kui Kai Lau, Yuen Kwun Wong, Kay Cheong Teo, Richard S K Chang, Man Yu Tse, Chu Peng Hoi, Chung Yan Chan, Oi Ling Chan, Ryan Hoi Kit Cheung, Edmund Ka Ming Wong, Joseph Shiu Kwong Kwan, Edward S Hui, Henry Ka Fung Mak
BACKGROUND: This study was performed to determine the clinical correlates and long-term prognostic implications of microbleed burden and location in Chinese patients with ischemic stroke. METHODS AND RESULTS: We recruited 1003 predominantly Chinese patients with ischemic stroke who received magnetic resonance imaging at the University of Hong Kong. We determined the clinical correlates of microbleeds and the long-term risks (3126 patient-years of follow-up) of recurrent ischemic stroke and intracerebral hemorrhage (ICH) by microbleed burden (0 versus 1, 2-4, and ≥5) and location, adjusting for age, sex, and vascular risk factors and stratified by antithrombotic use...
December 7, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/29210074/white-matter-degeneration-in-vascular-and-other-ageing-related-dementias
#16
REVIEW
Yoshika Hase, Karen Horsburgh, Masafumi Ihara, Raj N Kalaria
Advances in neuroimaging have enabled greater understanding of the progression of cerebral degenerative processes associated with ageing-related dementias. Leukoaraiosis or rarefied white matter (WM) originally described on computed tomography is one of the most prominent changes which occurs in older age. White matter hyperintensities (WMH) evident on magnetic resonance imaging have become commonplace to describe WM changes in relation to cognitive dysfunction, types of stroke injury, cerebral small vessel disease and neurodegenerative disorders including Alzheimer's disease...
December 6, 2017: Journal of Neurochemistry
https://www.readbyqxmd.com/read/29204961/patterns-of-convexal-subarachnoid-haemorrhage-clinical-radiological-and-outcome-differences-between-cerebral-amyloid-angiopathy-and-other-causes
#17
Lionel Calviere, Nicolas Raposo, Victor Cuvinciuc, Christophe Cognard, Fabrice Bonneville, Alain Viguier
BACKGROUND: Cerebral amyloid angiopathy (CAA) is a common aetiology of convexal subarachnoid haemorrhage (cSAH) but little is known about its specific characteristics in comparison with cSAH from other causes. In this study we compared patients with CAA vs. non-CAA-related cSAH. METHODS: Retrospective review of baseline and follow-up data of consecutive patients admitted with a symptomatic acute cSAH. RESULTS: Sixty-two patients were included (mean age 66...
December 4, 2017: Journal of Neurology
https://www.readbyqxmd.com/read/29201555/background-and-distribution-of-lobar-microbleeds-in-cognitive-dysfunction
#18
Hirofumi Matsuyama, Yuichiro Ii, Masayuki Maeda, Maki Umino, Yukito Ueda, Ken-Ichi Tabei, Hirotaka Kida, Masayuki Satoh, Akihiro Shindo, Akira Taniguchi, Ryosuke Takahashi, Hidekazu Tomimoto
Objectives: Cerebral microbleeds (CMBs) are often observed in memory clinic patients. It has been generally accepted that deep CMBs (D-CMBs) result from hypertensive vasculopathy (HV), whereas strictly lobar CMBs (SL-CMBs) result from cerebral amyloid angiopathy (CAA) which frequently coexists with Alzheimer's disease (AD). Mixed CMBs (M-CMBs) have been partially attributed to HV and also partially attributed to CAA. The aim of this study was to elucidate the differences between SL-CMBs and M-CMBs in terms of clinical features and regional distribution...
November 2017: Brain and Behavior
https://www.readbyqxmd.com/read/29183952/cerebellar-hematoma-location-implications-for-the-underlying-microangiopathy
#19
Marco Pasi, Sandro Marini, Andrea Morotti, Gregoire Boulouis, Li Xiong, Andreas Charidimou, Alison M Ayres, Myung Joo Lee, Alessandro Biffi, Joshua N Goldstein, Jonathan Rosand, M Edip Gurol, Steven M Greenberg, Anand Viswanathan
BACKGROUND AND PURPOSE: Spontaneous cerebellar intracerebral hemorrhage (ICH) has been reported to be mainly associated with vascular changes secondary to hypertension. However, a subgroup of cerebellar ICH seems related to vascular amyloid deposition (cerebral amyloid angiopathy). We sought to determine whether location of hematoma in the cerebellum (deep and superficial regions) was suggestive of a particular hemorrhage-prone small-vessel disease pathology (cerebral amyloid angiopathy or hypertensive vasculopathy)...
November 28, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29180960/association-of-cerebral-small-vessel-disease-burden-and-health-related-quality-of-life-after-acute-ischemic-stroke
#20
Yan Liang, Yang-Kun Chen, Min Deng, Vincent C T Mok, De-Feng Wang, Gabor S Ungvari, Chiu-Wing W Chu, Akane Kamiya, Wai-Kwong Tang
Objective: Cerebral small vessel disease (SVD) is associated with increased mortality, disability and cognitive decline, depression in stroke survivors. This study examined the association between SVD burden, defined by a combination of SVD markers, and health-related quality of life (HRQoL) in acute ischemic stroke. Methods: Patients admitted with acute ischemic stroke of any etiology were prospectively screened between January 2010 to December 2014 and enrolled in the study if they met study entry criteria...
2017: Frontiers in Aging Neuroscience
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