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Cerebral amyloid angiopathy

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https://www.readbyqxmd.com/read/27915995/lack-of-p-glycoprotein-results-in-impairment-of-removal-of-beta-amyloid-and-increased-intraparenchymal-cerebral-amyloid-angiopathy-after-active-immunization-in-a-transgenic-mouse-model-of-alzheimer-s-disease
#1
Sascha Brückmann, Anja Brenn, Markus Grube, Katharina Niedrig, Silva Holtfreter, Oliver von Bohlen Und Halbach, Martin Groschup, Markus Keller, Silke Vogelgesang
Immunization against beta-amyloid (Aβ) reduces cerebral Aβ deposits and improves cognitive capacities in transgenic mouse models, and thus has been considered a promising disease-modifying therapeutic approach for Alzheimer's disease (AD). Although clinical trials in AD patients have yielded evidence for clearance of parenchymal Aβ plaques, Aβ increases in blood vessels of treated patients. We hypothesize that an age-related decline in the mechanisms that clear Aβ from the brain might be at least in part responsible for the failure to purge and re-distribute Aβ...
December 1, 2016: Current Alzheimer Research
https://www.readbyqxmd.com/read/27915116/7t-mr-of-intracranial-pathology-preliminary-observations-and-comparisons-to-3t-and-1-5t
#2
Emmanuel C Obusez, Mark Lowe, Se-Hong Oh, Irene Wang, M S Jennifer Bullen, Paul Ruggieri, Virginia Hill, Daniel Lockwood, Todd Emch, Doksu Moon, Gareth Loy, Jonathan Lee, Matthew Kiczek, D O Manoj Massand, Volodymyr Statsevych, Todd Stultz, Stephen E Jones
PURPOSE: There have been an increasing number of studies involving ultra-high-field 7T of intracranial pathology, however, comprehensive clinical studies of neuropathology at 7T still remain limited. 7T has the advantage of a higher signal-to-noise ratio and a higher contrast-to-noise ratio, compared to current low field clinical MR scanners. We hypothesized 7T applied clinically, may improve detection and characterization of intracranial pathology. MATERIALS AND METHODS: We performed an IRB-approved 7T prospective study of patients with neurological disease who previously had lower field 3T and 1...
November 30, 2016: NeuroImage
https://www.readbyqxmd.com/read/27913939/erratum-to-cerebral-amyloid-angiopathy-in-a-young-man-with-a-history-of-traumatic-brain-injury-a-case-report-and-review-of-the-literature
#3
Yoichi Nakayama, Yohei Mineharu, Yoshiki Arakawa, Sei Nishida, Hirofumi Tsuji, Hidehiko Miyake, Maki Yamaguchi, Sachiko Minamiguchi, Yasushi Takagi, Susumu Miyamoto
No abstract text is available yet for this article.
December 3, 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27913818/-amyloid-positron-emission-tomography-with-18-%C3%A2-f-florbetaben-in-the-diagnostic-workup-of-dementia-patients
#4
S Schönecker, C Prix, T Raiser, N Ackl, E Wlasich, G Stenglein-Krapf, E Mille, M Brendel, O Sabri, M Patt, H Barthel, P Bartenstein, J Levin, A Rominger, A Danek
BACKGROUND: To this day the definite diagnosis of Alzheimer's disease still relies on post-mortem histopathological detection of neurofibrillary tangles and beta-amyloid deposits. Amyloid positron emission tomography (PET) is a new diagnostic tool that enables the in vivo quantification of pathological beta-amyloid deposits. The aim of the current study was to evaluate to what extent (18)F-florbetaben-PET (FBB-PET) influences the diagnosis of patients with dementia. MATERIAL AND METHODS: Imaging with FBB-PET was performed on 33 patients from our outpatient department for cognitive neurology...
December 2, 2016: Der Nervenarzt
https://www.readbyqxmd.com/read/27911290/rare-genetic-variant-in-sorl1-may-increase-penetrance-of-alzheimer-s-disease-in-a-family-with-several-generations-of-apoe-%C3%A9-4-homozygosity
#5
Eva Louwersheimer, Petra E Cohn-Hokke, Yolande A L Pijnenburg, Marjan M Weiss, Erik A Sistermans, Annemieke J Rozemuller, Marc Hulsman, John C van Swieten, Cock M van Duijn, Frederik Barkhof, Teddy Koene, Philip Scheltens, Wiesje M Van der Flier, Henne Holstege
BACKGROUND: The major genetic risk factor for late onset Alzheimer's disease (AD) is the APOE-ɛ4 allele. However, APOE-ɛ4 homozygosity is not fully penetrant, suggesting co-occurrence of additional genetic variants. OBJECTIVE: To identify genetic factors that, next to APOE-ɛ4 homozygosity, contribute to the development of AD. METHODS: We identified a family with nine AD patients spanning four generations, with an inheritance pattern suggestive of autosomal dominant AD, with no variants in PSEN1, PSEN2, or APP...
November 28, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27905358/-do-cerebral-microbleeds-increase-the-risk-of-hemorrhagic-complications-of-thrombolytic-therapy
#6
T A Polyakova, A V Arablinsky, O S Levin
The role of the cerebral microbleeds (CMB) as a potential predictor of hemorrhagic complications of thrombolytic therapy is discussed. CMB are small perivascular hemosiderin deposits in the brain detected by magnetic resonance imaging in gradient echo T2* or SWI sequences. They are associated (along with leukoaraiosis or lacunes) with cerebral microangiopathies. Most often CMB are associated with hypertensive arteriopathy (the main cause of CMB localization) or cerebral amyloid angiopathy (the main cause of cerebral CMB)...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27903811/%C3%AE-amyloid-in-csf-biomarker-for-preclinical-cerebral-amyloid-angiopathy
#7
Ellis S van Etten, Marcel M Verbeek, Jeroen van der Grond, Ronald Zielman, Sanneke van Rooden, Erik W van Zwet, Anna M van Opstal, Joost Haan, Steven M Greenberg, Mark A van Buchem, Marieke J H Wermer, Gisela M Terwindt
OBJECTIVE: To investigate CSF biomarkers in presymptomatic and symptomatic mutation carriers with hereditary cerebral hemorrhage with amyloidosis-Dutch type (HCHWA-D), a model for sporadic cerebral amyloid angiopathy, and to determine the earliest deposited form of β-amyloid (Aβ). METHODS: HCHWA-D mutation carriers and controls were enrolled in the cross-sectional EDAN (Early Diagnosis of Amyloid Angiopathy Network) study. The HCHWA-D group was divided into symptomatic carriers with a previous intracerebral hemorrhage and presymptomatic carriers...
November 30, 2016: Neurology
https://www.readbyqxmd.com/read/27898582/antithrombotic-therapy-in-patients-with-cerebral-microbleeds
#8
Duncan Wilson, David J Werring
PURPOSE OF REVIEW: Cerebral microbleeds (CMBs) are a radiological marker of cerebral small vessel disease corresponding to small haemosiderin foci identified by blood-sensitive MRI. CMBs are common in older community populations, and in individuals with ischaemic stroke or transient ischaemic attack (TIA), and intracerebral haemorrhage (ICH). We summarize how CMBs might contribute to assessing the future risk of ischaemic stroke and ICH to inform antithrombotic (antiplatelet or anticoagulant) decisions...
November 24, 2016: Current Opinion in Neurology
https://www.readbyqxmd.com/read/27893876/imaging-the-acute-formation-of-a-cortical-microbleed-in-cerebral-amyloid-angiopathy
#9
Gregoire Boulouis, Andreas Charidimou, Susanne Van Veluw, Steven M Greenberg
No abstract text is available yet for this article.
November 28, 2016: JAMA Neurology
https://www.readbyqxmd.com/read/27890830/time-course-of-glial-changes-in-the-hyperhomocysteinemia-model-of-vascular-cognitive-impairment-and-dementia-vcid
#10
Tiffany L Sudduth, Erica M Weekman, Brittani R Price, Jennifer L Gooch, Abigail Woolums, Christopher M Norris, Donna M Wilcock
Vascular cognitive impairment and dementia (VCID) is the second leading cause of dementia behind Alzheimer's disease (AD) and is a frequent co-morbidity with AD. Despite its prevalence, little is known about the molecular mechanisms underlying the cognitive dysfunction resulting from cerebrovascular disease. Astrocytic end-feet almost completely surround intraparenchymal blood vessels in the brain and express a variety of channels and markers indicative of their specialized functions in the maintenance of ionic and osmotic homeostasis and gliovascular signaling...
November 25, 2016: Neuroscience
https://www.readbyqxmd.com/read/27884212/angiotensin-converting-enzyme-2-is-reduced-in-alzheimer-s-disease-in-association-with-increasing-amyloid-%C3%AE-and-tau-pathology
#11
Patrick Gavin Kehoe, Steffenny Wong, Noura Al Mulhim, Laura Elyse Palmer, J Scott Miners
BACKGROUND: Hyperactivity of the classical axis of the renin-angiotensin system (RAS), mediated by angiotensin II (Ang II) activation of the angiotensin II type 1 receptor (AT1R), is implicated in the pathogenesis of Alzheimer's disease (AD). Angiotensin-converting enzyme-2 (ACE-2) degrades Ang II to angiotensin 1-7 (Ang (1-7)) and counter-regulates the classical axis of RAS. We have investigated the expression and distribution of ACE-2 in post-mortem human brain tissue in relation to AD pathology and classical RAS axis activity...
November 25, 2016: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/27871078/cerebral-microhemorrhages-and-meningeal-siderosis-in-infective-endocarditis
#12
Ajay Malhotra, Joseph Schindler, Brian Mac Grory, Stacy Y Chu, Teddy S Youn, Charles Matouk, David M Greer, Matthew Schrag
OBJECTIVE: Patients with infective endocarditis (IE) frequently experience cerebral insults, and neurological involvement in IE has been reported to herald a worse prognosis. In this manuscript, we describe a distinctive pattern of findings on susceptibility-weighted imaging (SWI) sequences in subjects with IE. METHODS: Patients with IE who underwent SWI MRI at an academic hospital from 2009 to 2014 were retrospectively analyzed. The pattern of findings was compared to SWI findings in groups of subjects with cerebral amyloid angiopathy (CAA) or severe hypertension...
November 22, 2016: Cerebrovascular Diseases
https://www.readbyqxmd.com/read/27869115/cerebral-vascular-amyloid-seeds-drive-amyloid-%C3%AE-protein-fibril-assembly-with-a-distinct-anti-parallel-structure
#13
Feng Xu, Ziao Fu, Sharmila Dass, AnnMarie E Kotarba, Judianne Davis, Steven O Smith, William E Van Nostrand
Cerebrovascular accumulation of amyloid β-protein (Aβ), a condition known as cerebral amyloid angiopathy (CAA), is a common pathological feature of patients with Alzheimer's disease. Familial Aβ mutations, such as Dutch-E22Q and Iowa-D23N, can cause severe cerebrovascular accumulation of amyloid that serves as a potent driver of vascular cognitive impairment and dementia. The distinctive features of vascular amyloid that underlie its unique pathological properties remain unknown. Here, we use transgenic mouse models producing CAA mutants (Tg-SwDI) or overproducing human wild-type Aβ (Tg2576) to demonstrate that CAA-mutant vascular amyloid influences wild-type Aβ deposition in brain...
November 21, 2016: Nature Communications
https://www.readbyqxmd.com/read/27858710/app-mutations-in-cerebral-amyloid-angiopathy-with-or-without-cortical-calcifications-report-of-three-families-and-a%C3%A2-literature-review
#14
François Sellal, David Wallon, Laurent Martinez-Almoyna, Cecilia Marelli, Abhinav Dhar, Héléne Oesterlé, Anne Rovelet-Lecrux, Stéphane Rousseau, Christina E Kourkoulis, Jon Rosand, Zora Y DiPucchio, Matthew Frosch, Claudine Gombert, Bertrand Audoin, Manuéle Mine, Florence Riant, Thierry Frebourg, Didier Hannequin, Dominique Campion, Steven M Greenberg, Elisabeth Tournier-Lasserve, Gaël Nicolas
BACKGROUND: Specific APP mutations cause cerebral amyloid angiopathy (CAA) with or without Alzheimer's disease (AD). OBJECTIVE: We aimed at reporting APP mutations associated with CAA, describe the clinical, cerebrospinal fluid AD biomarkers, and neuroimaging features, and compare them with the data from the literature. METHODS: We performed a retrospective study in two French genetics laboratories by gathering all clinical and neuroimaging data from patients referred for a genetic diagnosis of CAA with an age of onset before 66 years and fulfilling the other Boston revised criteria...
November 14, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27853131/rapidly-sequential-and-fatal-hemorrhaging-in-a-case-of-cerebral-amyloid-angiopathy
#15
Zachary B Bulwa, G Carter Ward, Owen Kramer, Birju Rao, Melvin Wichter
BACKGROUND Cerebral amyloid angiopathy (CAA) is an increasingly recognized cause of lobar intracerebral hemorrhage (ICH) and cognitive impairment in the aging population. Magnetic resonance imaging (MRI) of cerebral microbleeds is the most reliable option for clinical diagnosis of suspected CAA. The pathophysiology of microbleeds and ICH in CAA is not well understood, but it is thought to be the result of vessel weakening and rupture secondary to amyloid deposition. Little evidence has been established pertaining to the time course of recurrent CAA-related microbleeds or larger hemorrhages...
November 17, 2016: American Journal of Case Reports
https://www.readbyqxmd.com/read/27836896/reduced-nitric-oxide-bioavailability-mediates-cerebroarterial-dysfunction-independent-of-cerebral-amyloid-angiopathy-in-a-mouse-model-of-alzheimer-s-disease
#16
Mario Merlini, Yi Shi, Stephan Keller, Gianluigi Savarese, Alexander Akhmedov, Rebecca Derungs, Remo Daniel Spescha, Luka Kulic, Roger Nitsch, Thomas Lüscher, Giovanni Camici
In Alzheimer's disease (AD), cerebral arteries, in contrast to cerebral microvessels, show both cerebral amyloid angiopathy- (CAA) dependent and -independent vessel wall pathology. However, it remains unclear whether CAA-independent vessel wall pathology affects arterial function thereby chronically reducing cerebral perfusion, and if so which mechanisms mediate this effect. To this end, we assessed the ex vivo vascular function of the basilar artery and a similar-sized peripheral artery (femoral artery) in the Swedish-Arctic (SweArc) transgenic AD mouse model at different disease stages...
November 11, 2016: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/27834748/early-magnetic-resonance-imaging-and-cognitive-markers-of-hereditary-cerebral-amyloid-angiopathy
#17
Sanneke van Rooden, Anna M van Opstal, Gerda Labadie, Gisela M Terwindt, Marieke J H Wermer, Andrew G Webb, Huub A M Middelkoop, Steven M Greenberg, Jeroen van der Grond, Mark A van Buchem
BACKGROUND AND PURPOSE: Early markers for cerebral amyloid angiopathy are largely unknown. We aimed to identify which magnetic resonance imaging (MRI) (performed at 7 and 3T) and cognitive markers are an early sign in (pre) symptomatic subjects with hereditary cerebral hemorrhage with amyloidosis-Dutch type. METHODS: Twenty-seven DNA-proven Dutch-type mutation carriers (15 symptomatic and 12 presymptomatic) (mean age of 45.9 years) and 33 controls (mean age of 45...
December 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27816341/stroke-prevention
#18
Clothilde Isabel, David Calvet, Jean-Louis Mas
Patients who have had a stroke are at high risk for recurrent stroke, myocardial infarction, and vascular death. Prevention of these events should be initiated promptly after stroke, because many recurrent events occur early, and should be tailored to the precise cause of stroke, which may require specific treatment. Lifestyle advice including abstinence from smoking, regular exercise, Mediterranean-style diet, and reduction of salt intake and alcohol consumption are recommended for all patients with stroke...
November 3, 2016: La Presse Médicale
https://www.readbyqxmd.com/read/27812816/cerebral-amyloid-angiopathy-in-a-young-man-with-a-history-of-traumatic-brain-injury-a-case-report-and-review-of-the-literature
#19
Yoichi Nakayama, Yohei Mineharu, Yoshiki Arawaka, Sei Nishida, Hirofumi Tsuji, Hidehiko Miyake, Maki Yamaguchi, Sachiko Minamiguchi, Yasushi Takagi, Susumu Miyamoto
Cerebral amyloid angiopathy (CAA), a cause of recurrent and multiple lobar hemorrhages, characteristically occurs in persons aged ≥55 years. We report a case of a 32-year-old male who had recurrent hemorrhage in the left multiple lobes, with a history of traumatic brain injury and hematoma evacuation at the age of 1 year. He underwent surgical treatment and was histopathologically diagnosed as having CAA. The literature review yielded six CAA cases, including ours, aged less than 55 years. All were male and four had histories of severe TBI, suggesting that male sex and TBI may be associated with CAA in young persons...
November 4, 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27806359/etiologic-and-clinical-characterization-of-patients-with-recurrent-spontaneous-intracerebral-hemorrhage
#20
Marc E Wolf, Angelika Alonso, Anne D Ebert, Kristina Szabo, Anastasios Chatzikonstantinou
BACKGROUND: The impact of recurrent stroke has been extensively addressed with regard to ischemic stroke, revealing potentially different etiologies of recurrent events in the individual patient. In contrast, data on recurrent intracerebral hemorrhage (ICH) are scarce, especially considering etiologic characterization. We aimed to determine the etiology of recurrent ICH at each event to identify potential etiologic changes. PATIENTS AND METHODS: We analyzed the data of patients admitted to our stroke unit with recurrent ICH between 1998 and 2014 with regard to clinical characteristics and etiology...
2016: European Neurology
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