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Cerebral amyloid angiopathy

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https://www.readbyqxmd.com/read/29134927/cerebral-amyloid-angiopathy-associated-with-inflammation-a-systematic-review-of-clinical-and-imaging-features-and-outcome
#1
Andrej Corovic, Siobhan Kelly, Hugh S Markus
Background Cerebral amyloid angiopathy associated with inflammation is an increasingly recognized condition, characterized by an inflammatory response to the vascular deposits of β-amyloid within the brain that are the hallmark of cerebral amyloid angiopathy. Two main patterns of this inflammatory response have been identified to date: one involving a perivascular inflammatory cell infiltrate (cerebral amyloid angiopathy-related inflammation); the other a transmural vasculitic process (A-beta related angiitis)...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/29126445/ykl-40-in-the-brain-and-cerebrospinal-fluid-of-neurodegenerative-dementias
#2
Franc Llorens, Katrin Thüne, Waqas Tahir, Eirini Kanata, Daniela Diaz-Lucena, Konstantinos Xanthopoulos, Eleni Kovatsi, Catharina Pleschka, Paula Garcia-Esparcia, Matthias Schmitz, Duru Ozbay, Susana Correia, Ângela Correia, Ira Milosevic, Olivier Andréoletti, Natalia Fernández-Borges, Ina M Vorberg, Markus Glatzel, Theodoros Sklaviadis, Juan Maria Torres, Susanne Krasemann, Raquel Sánchez-Valle, Isidro Ferrer, Inga Zerr
BACKGROUND: YKL-40 (also known as Chitinase 3-like 1) is a glycoprotein produced by inflammatory, cancer and stem cells. Its physiological role is not completely understood but YKL-40 is elevated in the brain and cerebrospinal fluid (CSF) in several neurological and neurodegenerative diseases associated with inflammatory processes. Yet the precise characterization of YKL-40 in dementia cases is missing. METHODS: In the present study, we comparatively analysed YKL-40 levels in the brain and CSF samples from neurodegenerative dementias of different aetiologies characterized by the presence of cortical pathology and disease-specific neuroinflammatory signatures...
November 10, 2017: Molecular Neurodegeneration
https://www.readbyqxmd.com/read/29125055/cerebral-amyloid-angiopathy-cerebral-microbleeds-and-implications-for-anticoagulation-decisions-the-need-for-a-balanced-approach
#3
Andreas Charidimou, Ashkan Shoamanesh, Rustam Al-Shahi Salman, Charlotte Cordonnier, Luke A Perry, Kevin N Sheth, Alessandro Biffi, Jonathan Rosand, Anand Viswanathan
Cerebral amyloid angiopathy is a common hemorrhagic small vessel disease of the brain, often associated with high risk of spontaneous lobar intracerebral hemorrhage. When the suspicion of cerebral amyloid angiopathy is raised, clinicians are hesitant in prescribing oral anticoagulation in patients in whom it is otherwise indicated, including the case of non-valvular atrial fibrillation. This is one of the thorniest clinical dilemmas in the field currently. In this short Leading Opinion piece by an international panel of clinicians-researchers active in the field, we present our consistent approach and future outlook on oral anticoagulation post intracerebral hemorrhage and in the setting of clinical-radiologic evidence of cerebral amyloid angiopathy...
January 1, 2017: International Journal of Stroke: Official Journal of the International Stroke Society
https://www.readbyqxmd.com/read/29120920/the-growing-clinical-spectrum-of-cerebral-amyloid-angiopathy
#4
Marieke J H Wermer, Steven M Greenberg
PURPOSE OF REVIEW: Cerebral amyloid angiopathy (CAA) is diagnosed primarily as a cause of lobar intracerebral hemorrhages (ICH) in elderly patients. With improving MRI techniques, however, the role of CAA in causing other symptoms has become clear. Recognizing the full clinical spectrum of CAA is important for diagnosis and treatment. In this review we summarize recent insights in clinical CAA features, MRI biomarkers, and management. RECENT FINDINGS: The rate of ICH recurrence in CAA is among the highest of all stroke subtypes...
November 7, 2017: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29112196/understanding-the-roles-of-mutations-in-the-amyloid-precursor-protein-in-alzheimer-disease
#5
REVIEW
S Hunter, C Brayne
Many models of disease progression in Alzheimer's disease (AD) have been proposed to help guide experimental design and aid the interpretation of results. Models focussing on the genetic evidence include the amyloid cascade (ACH) and presenilin (PSH) hypotheses and the amyloid precursor protein (APP) matrix approach (AMA), of which the ACH has held a dominant position for over two decades. However, the ACH has never been fully accepted and has not yet delivered on its therapeutic promise. We review the ACH, PSH and AMA in relation to levels of APP proteolytic fragments reported from AD-associated mutations in APP...
November 7, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29110998/total-small-vessel-disease-burden-and-brain-network-efficiency-in-cerebral-amyloid-angiopathy
#6
Raffaella Valenti, Yael D Reijmer, Andreas Charidimou, Gregoire Boulouis, Sergi Ramirez Martinez, Li Xiong, Panagiotis Fotiadis, Michael Jessel, Alison Ayres, Grace Riley, Leonardo Pantoni, M Edip Gurol, Steven M Greenberg, Anand Viswanathan
BACKGROUND: Cerebral amyloid angiopathy (CAA) is associated with hemorrhagic and nonhemorrhagic markers small vessel disease (SVD). A composite score to quantify the total burden of SVD on MRI specifically for CAA patients was recently developed. Brain network alterations related to individual MRI markers of SVD in CAA were demonstrated. OBJECTIVES: Considering diffusion based network measures sensitive to detect different relevant SVD-related brain injury, we investigated if increased overall SVD injury on MRI corresponds to worse global brain connectivity in CAA...
November 15, 2017: Journal of the Neurological Sciences
https://www.readbyqxmd.com/read/29109280/oxalate-curcumin-based-probe-for-micro-and-macroimaging-of-reactive-oxygen-species-in-alzheimer-s-disease
#7
Jian Yang, Xueli Zhang, Peng Yuan, Jing Yang, Yungen Xu, Jaime Grutzendler, Yihan Shao, Anna Moore, Chongzhao Ran
Alzheimer's disease (AD) is an irreversible neurodegenerative disorder that has a progression that is closely associated with oxidative stress. It has long been speculated that the reactive oxygen species (ROS) level in AD brains is much higher than that in healthy brains. However, evidence from living beings is scarce. Inspired by the "chemistry of glow stick," we designed a near-IR fluorescence (NIRF) imaging probe, termed CRANAD-61, for sensing ROS to provide evidence at micro- and macrolevels. In CRANAD-61, an oxalate moiety was utilized to react with ROS and to consequentially produce wavelength shifting...
November 6, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29077753/correction-imaging-features-of-intracerebral-hemorrhage-with-cerebral-amyloid-angiopathy-systematic-review-and-meta-analysis
#8
Neshika Samarasekera, Mark Alexander Rodrigues, Pheng Shiew Toh, Rustam Al-Shahi Salman
[This corrects the article DOI: 10.1371/journal.pone.0180923.].
2017: PloS One
https://www.readbyqxmd.com/read/29077577/sporadic-cerebral-amyloid-angiopathy-with-cortical-occipital-calcifications-in-the-elderly
#9
Gaël Nicolas, Olivier Martinaud
No abstract text is available yet for this article.
October 26, 2017: Alzheimer Disease and Associated Disorders
https://www.readbyqxmd.com/read/29070715/prevalence-and-natural-history-of-superficial-siderosis-a-population-based-study
#10
Michael Pichler, Prashanthi Vemuri, Alejandro A Rabinstein, Jeremiah Aakre, Kelly D Flemming, Robert D Brown, Neeraj Kumar, Kejal Kantarci, Walter Kremers, Michelle M Mielke, David S Knopman, Clifford R Jack, Ronald C Petersen, Val Lowe, Jonathan Graff-Radford
BACKGROUND AND PURPOSE: Superficial siderosis (SS) is characterized by hemosiderin deposition in the superficial layers of the central nervous system and can be seen during postmortem examination or with iron-sensitive magnetic resonance imaging techniques. The distribution of SS may predict the probable underlying cause. This study aimed to report the prevalence and natural history of SS in a population-based study. METHODS: Brain magnetic resonance imaging scans from the MCSA (Mayo Clinic Study of Aging), a population-based study of residents 50 to 89 years of age in Olmsted County, Minnesota, were reviewed...
October 25, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29070669/cortical-superficial-siderosis-multifocality-in-cerebral-amyloid-angiopathy-a-prospective-study
#11
Andreas Charidimou, Gregoire Boulouis, Duangnapa Roongpiboonsopit, Eitan Auriel, Marco Pasi, Kellen Haley, Ellis S van Etten, Sergi Martinez-Ramirez, Alison Ayres, Anastasia Vashkevich, Kristin M Schwab, Joshua N Goldstein, Jonathan Rosand, Anand Viswanathan, Steven M Greenberg, M Edip Gurol
OBJECTIVE: In order to explore the mechanisms of cortical superficial siderosis (cSS) multifocality and its clinical implications for recurrent intracerebral hemorrhage (ICH) risk in patients with cerebral amyloid angiopathy (CAA), we used a new rating method that we developed specifically to evaluate cSS extent at spatially separated foci. METHODS: Consecutive patients with CAA-related ICH according to Boston criteria from a single-center prospective cohort were analyzed...
October 25, 2017: Neurology
https://www.readbyqxmd.com/read/29070668/evolution-of-dwi-lesions-in-cerebral-amyloid-angiopathy-evidence-for-ischemia
#12
Susanne J van Veluw, Arne Lauer, Andreas Charidimou, Narimene Bounemia, Li Xiong, Gregoire Boulouis, Panagiotis Fotiadis, Alison Ayres, M Edip Gurol, Anand Viswanathan, Steven M Greenberg, Meike W Vernooij
OBJECTIVE: To address the pathophysiologic nature of small diffusion-weighted imaging (DWI) lesions in patients with cerebral amyloid angiopathy (CAA) who underwent serial MRI. Specifically, we tested (1) whether DWI lesions occurred preferentially in individuals with prior DWI lesions, (2) the cross-sectional association with chronic cortical cerebral microinfarcts (CMIs), and (3) the evolution of DWI lesions over time. METHODS: Patients with probable CAA (n = 79) who underwent at least 2 MRI sessions were included...
October 25, 2017: Neurology
https://www.readbyqxmd.com/read/29070646/amyloid-pet-burden-and-regional-distribution-in-cerebral-amyloid-angiopathy-a-systematic-review-and-meta-analysis-of-biomarker-performance
#13
Andreas Charidimou, Karim Farid, Hsin-Hsi Tsai, Li-Kai Tsai, Rouh-Fang Yen, Jean-Claude Baron
INTRODUCTION: We performed a meta-analysis to synthesise current evidence on amyloid-positron emission tomography (PET) burden and presumed preferential occipital distribution in sporadic cerebral amyloid angiopathy (CAA). METHODS: In a PubMed systematic search, we identified case-control studies with extractable data on global and occipital-to-global amyloid-PET uptake in symptomatic patients with CAA (per Boston criteria) versus control groups (healthy participants or patients with non-CAA deep intracerebral haemorrhage) and patients with Alzheimer's disease...
October 25, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29064155/assessing-inflammation-in-acute-intracerebral-hemorrhage-with-pk11195-pet-and-dynamic-contrast-enhanced-mri
#14
Kamran A Abid, Oluwaseun A Sobowale, Laura M Parkes, Josephine Naish, Geoff J M Parker, Daniel du Plessis, David Brough, Jack Barrington, Stuart M Allan, Rainer Hinz, Adrian R Parry-Jones
BACKGROUND AND PURPOSE: Studies in animal models suggest that inflammation is a major contributor to secondary injury after intracerebral hemorrhage (ICH). Direct, noninvasive monitoring of inflammation in the human brain after ICH will facilitate early-phase development of anti-inflammatory treatments. We sought to investigate the feasibility of multimodality brain imaging in subacute ICH. METHODS: Acute ICH patients were recruited to undergo multiparametric MRI (including dynamic contrast-enhanced measurement of blood-brain barrier transfer constant (K(trans) ) and PET with [(11) C]-(R)-PK11195)...
October 24, 2017: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29054916/acute-convexity-subarachnoid-haemorrhage-and-cortical-superficial-siderosis-in-probable-cerebral-amyloid-angiopathy-without-lobar-haemorrhage
#15
Andreas Charidimou, Grégoire Boulouis, Panagiotis Fotiadis, Li Xiong, Alison M Ayres, Kristin M Schwab, Mahmut Edip Gurol, Jonathan Rosand, Steve M Greenberg, Anand Viswanathan
INTRODUCTION: Acute non-traumatic convexity subarachnoid haemorrhage (cSAH) is increasingly recognised in cerebral amyloid angiopathy (CAA). We investigated: (a) the overlap between acute cSAH and cortical superficial siderosis-a new CAA haemorrhagic imaging signature and (b) whether acute cSAH presents with particular clinical symptoms in patients with probable CAA without lobar intracerebral haemorrhage. METHODS: MRI scans of 130 consecutive patients meeting modified Boston criteria for probable CAA were analysed for cortical superficial siderosis (focal, ≤3 sulci; disseminated, ≥4 sulci), and key small vessel disease markers...
October 20, 2017: Journal of Neurology, Neurosurgery, and Psychiatry
https://www.readbyqxmd.com/read/29053885/cortical-superficial-siderosis-and-acute-convexity-subarachnoid-hemorrhage-in-cerebral-amyloid-angiopathy
#16
Nicolas Raposo, Lionel Calviere, Vanessa Cazzola, Mélanie Planton, Sofia Patsoura, Matthieu Wargny, Jean François Albucher, Agnès Sommet, Jean Marc Olivot, François Chollet, Jérémie Pariente, Fabrice Bonneville, Alain Viguier
BACKGROUND: Acute convexity subarachnoid hemorrhage (cSAH) and cortical superficial siderosis (cSS) are neuroimaging markers of cerebral amyloid angiopathy (CAA) that may arise through similar mechanisms. We sought to compare the prevalence of cSS between patients with CAA presenting with acute cSAH versus lobar intracerebral hemorrhage (ICH), and to explore the physiopathology of cSS by examining neuroimaging associations. METHODS: We retrospectively analyzed data from 116 consecutive patients with probable CAA (mean age, 77...
October 20, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29047416/lessons-learned-about-f-18-av-1451-off-target-binding-from-an-autopsy-confirmed-parkinson-s-case
#17
Marta Marquié, Eline E Verwer, Avery C Meltzer, Sally Ji Who Kim, Cinthya Agüero, Jose Gonzalez, Sara J Makaretz, Michael Siao Tick Chong, Prianca Ramanan, Ana C Amaral, Marc D Normandin, Charles R Vanderburg, Stephen N Gomperts, Keith A Johnson, Matthew P Frosch, Teresa Gómez-Isla
[F-18]-AV-1451 is a novel positron emission tomography (PET) tracer with high affinity to neurofibrillary tau pathology in Alzheimer's disease (AD). PET studies have shown increased tracer retention in patients clinically diagnosed with dementia of AD type and mild cognitive impairment in regions that are known to contain tau lesions. In vivo uptake has also consistently been observed in midbrain, basal ganglia and choroid plexus in elderly individuals regardless of their clinical diagnosis, including clinically normal whose brains are not expected to harbor tau pathology in those areas...
October 19, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/29037261/distinct-deposition-of-amyloid-%C3%AE-species-in-brains-with-alzheimer-s-disease-pathology-visualized-with-maldi-imaging-mass-spectrometry
#18
Nobuto Kakuda, Tomohiro Miyasaka, Noriyuki Iwasaki, Takashi Nirasawa, Satoko Wada-Kakuda, Junko Takahashi-Fujigasaki, Shigeo Murayama, Yasuo Ihara, Masaya Ikegawa
Amyloid β (Aβ) deposition in the brain is an early and invariable feature of Alzheimer's disease (AD). The Aβ peptides are composed of about 40 amino acids and are generated from amyloid precursor proteins (APP), by β- and γ-secretases. The distribution of individual Aβ peptides in the brains of aged people, and those suffering from AD and cerebral amyloid angiopathy (CAA), is not fully characterized. We employed the matrix-assisted laser desorption/ionization-imaging mass spectrometry (MALDI-IMS) to illustrate the spatial distribution of a broad range of Aβ species in human autopsied brains...
October 16, 2017: Acta Neuropathologica Communications
https://www.readbyqxmd.com/read/29018971/csf-rbc-count-in-successful-first-attempt-lumbar-puncture-the-interest-of-atraumatic-needle-use
#19
Dimitri Renard, Eric Thouvenot
The objective of this study is to analyze CSF red blood cell (RBC) count from first-attempt lumbar punctures and to analyze parameters associated with first-attempt lumbar punctures and hemorrhagic lumbar puncture. This is a prospective analysis of consecutive patients who underwent lumbar puncture for any reason other than suspected acute subarachnoid hemorrhage. Analyzed parameters were the following: age, indication for lumbar puncture, aPTT ratio, PTT, platelet count, patient's position, needle type (atraumatic/standard), needle diameter, person performing lumbar puncture (medical student/resident/attending physician), number of lumbar levels punctured, necessity of needle repositioning, CSF RBC and white blood cell count, and protein level...
October 10, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/29018129/neuroimaging-correlates-of-cerebral-microbleeds-the-aric-study-atherosclerosis-risk-in-communities
#20
MULTICENTER STUDY
Jonathan Graff-Radford, Jeannette Simino, Kejal Kantarci, Thomas H Mosley, Michael E Griswold, B Gwen Windham, A Richey Sharrett, Marilyn S Albert, Rebecca F Gottesman, Clifford R Jack, Prashanthi Vemuri, David S Knopman
BACKGROUND AND PURPOSE: Cerebral microbleed (CMB) location (deep versus strictly lobar) may elucidate underlying pathology with deep CMBs being more associated with hypertensive vascular disease and lobar CMBs being more associated with cerebral amyloid angiopathy. The objective of this study was to determine whether neuroimaging signs of vascular disease and Alzheimer pathology are associated with different types of CMBs. METHODS: Among 1677 nondemented ARIC (Atherosclerosis Risk in Communities) participants (mean age=76±5 years; 40% men; 26% black) with 3-Tesla MRI scans at the fifth examination (2011-2013), we fit multinomial logistic regression models to quantify relationships of brain volumes (Alzheimer disease signature regions, total gray matter, frontal gray matter, and white matter hyperintensity volumes), infarct frequencies (lacunar, nonlacunar, and total), and apolipoprotein E (number of ε4 alleles) with CMB location (none, deep/mixed, or strictly lobar CMBs)...
November 2017: Stroke; a Journal of Cerebral Circulation
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