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https://www.readbyqxmd.com/read/29772547/role-of-alpha1-adrenergic-receptor-antibodies-in-alzheimer-s-disease
#1
Peter Karczewski, Petra Hempel, Marion Bimmler
Agonistic autoantibodies (agAAB) for alpha-1 adrenoceptor were found in approx. 50% of patients with Alzheimer's disease. These antibodies activate the receptor and trigger the signal cascades similarly to how natural agonists do. The agAAB bond to the receptor is persistent and prolonged. This results in a non-physiological elevation of intracellular calcium. An animal model has shown that agAAB causes macrovascular and microvascular impairment in the vessels of the brain. Reduction in blood flow and the density of intact vessels was significantly demonstrated...
June 1, 2018: Frontiers in Bioscience (Landmark Edition)
https://www.readbyqxmd.com/read/29768374/treatment-of-multiple-refractory-ankle-ulcerations-in-thromboangiitis-obliterans-a-case-report
#2
Zheng-Hao Huang, San-Yuan Kuo, Yu-Hsiang Chiu, Hsiang-Cheng Chen, Chun-Chi Lu
RATIONALE: Thromboangiitis obliterans (TAOs, or Buerger's disease) present as a non-atherosclerotic segmental occlusive vasculitis within medium- and small-sized blood vessels. TAO frequently occurs in young adults and is associated with cigarette smoking. At present, there are no accurately defined treatments for TAO. PATIENT CONCERNS: A 34-year-old Asian woman with a 20-year history of heavy cigarette smoking and recurrent, small, and self-limited lower limb ulcerations since adolescence, presented with persisting unhealed ulcerations on both ankles for 6 months...
May 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29760289/-neurocognitive-disorders-other-than-alzheimer-disease-vascular-dementia
#3
Mari Yoshida
Vascular dementia involves several mechanism of pathogenesis. Cerebral small vessel diseases play a central role in vascular dementia, including sporadic cerebral small vessel diseases, cerebral autosomal-dominant or autosomal recessive arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL or CARASIL), cerebral amyloid angiopathy, and amyloid β-related angiitis. Although these diseases have different pathomechanisms, chronic white matter hypoperfusion contributes to development of neuronal dysfunction as a common pathway in vascular dementia...
May 2018: Brain and Nerve, Shinkei Kenkyū No Shinpo
https://www.readbyqxmd.com/read/29758937/the-controversial-origin-of-pericytes-during-angiogenesis-implications-for-cell-based-therapeutic-angiogenesis-and-cell-based-therapies
#4
Anna Blocki, Sebastian Beyer, Friedrich Jung, Michael Raghunath
Pericytes reside within the basement membrane of small vessels and are often in direct cellular contact with endothelial cells, fulfilling important functions during blood vessel formation and homeostasis. Recently, these pericytes have been also identified as mesenchymal stem cells. Mesenchymal stem cells, and especially their specialized subpopulation of pericytes, represent promising candidates for therapeutic angiogenesis applications, and have already been widely applied in pre-clinical and clinical trials...
2018: Clinical Hemorheology and Microcirculation
https://www.readbyqxmd.com/read/29757677/microrna-dysregulation-in-pulmonary-arteries-from-copd-relationships-with-vascular-remodeling
#5
Melina M Musri, Núria Coll-Bonfill, Bradley A Maron, Víctor I Peinado, Ruisheng Wang, Jordi Altirriba, Isabel Blanco, William M Oldham, Olga Tura-Ceide, Jessica García-Lucio, Benjamin de la Cruz-Thea, Gunter Meister, Joseph Loscalzo, Joan A Barberà
BACKGROUND: Pulmonary vascular remodeling is an angiogenic-related process involving changes in smooth muscle cell (SMC) homeostasis, which is frequently observed in chronic obstructive pulmonary disease (COPD). MicroRNAs (miRNAs) are small non-coding RNAs that regulate mRNA expression levels of many genes leading to the manifestation of cell identity and specific cellular phenotypes. Here we evaluate the miRNA expression profiles of pulmonary arteries (PA) of patients with COPD and its relationship with the regulation of SMC phenotypic change...
May 14, 2018: American Journal of Respiratory Cell and Molecular Biology
https://www.readbyqxmd.com/read/29757481/severe-white-matter-astrocytopathy-in-cadasil
#6
Yoshiki Hase, Aiqing Chen, Letitia L Bates, Lucinda J L Craggs, Yumi Yamamoto, Elizabeth Gemmell, Arthur E Oakley, Viktor I Korolchuk, Raj N Kalaria
Objectives Cerebral autosomal dominant arteriopathy with subcortical infarcts and leukoencephalopathy (CADASIL) is characterised by strategic white matter (WM) hyperintensities on MRI. Pathological features include WM degeneration, arteriolosclerosis, lacunar infarcts and the deposition of granular osmiophilic material. Based on the hypothesis that the gliovascular unit is compromised, we assessed the nature of astrocyte damage in the deep WM of CADASIL subjects. Methods We evaluated post-mortem brains from CADASIL, cerebral small vessel disease, similar age cognitively normal and older control subjects...
May 14, 2018: Brain Pathology
https://www.readbyqxmd.com/read/29753656/-small-vessel-cerebrovascular-disease
#7
P Cardona Portela, A Escrig Avellaneda
Small vessel vascular disease is a spectrum of different conditions that includes lacunar infarction, alteration of deep white matter, or microbleeds. Hypertension is the main risk factor, although the atherothrombotic lesion may be present, particularly in large-sized lacunar infarctions along with other vascular risk factors. MRI findings are characteristic and the lesions authentic biomarkers that allow differentiating the value of risk factors and defining their prognostic value.
May 9, 2018: Hipertensión y Riesgo Vascular
https://www.readbyqxmd.com/read/29752348/genetic-study-of-white-matter-integrity-in-uk-biobank-n-8448-and-the-overlap-with-stroke-depression-and-dementia
#8
Loes C A Rutten-Jacobs, Daniel J Tozer, Marco Duering, Rainer Malik, Martin Dichgans, Hugh S Markus, Matthew Traylor
BACKGROUND AND PURPOSE: Structural integrity of the white matter is a marker of cerebral small vessel disease, which is the major cause of vascular dementia and a quarter of all strokes. Genetic studies provide a way to obtain novel insights in the disease mechanism underlying cerebral small vessel disease. The aim was to identify common variants associated with microstructural integrity of the white matter and to elucidate the relationships of white matter structural integrity with stroke, major depressive disorder, and Alzheimer disease...
May 11, 2018: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29751260/forkhead-box-c1-gene-variant-causing-glaucoma-and-small-vessel-angiopathy-can-mimic-multiple-sclerosis
#9
Jagannadha R Avasarala, Julie R Jones, Curtis R Rogers
A 34-year old Caucasian female was initially diagnosed with multiple small-vessel strokes at age 20 years which were etiologically classified as secondary to anti-phospholipid antibody syndrome (APS) although she had no history or laboratory data to suggest APS. Based on her MRI of brain findings, one of her neurologists was concerned she could have multiple sclerosis (MS) and hence the patient was referred to our clinic for further evaluation. The patient's MRI of brain showed confluent lesions in the periventricular and juxta-cortical lesions that fulfil 2017 McDonald criteria for dissemination in space...
April 21, 2018: Multiple Sclerosis and related Disorders
https://www.readbyqxmd.com/read/29749141/particle-swarm-optimization-method-for-small-retinal-vessels-detection-on-multiresolution-fundus-images
#10
Bilal Khomri, Argyrios Christodoulidis, Leila Djerou, Mohamed Chaouki Babahenini, Farida Cheriet
Retinal vessel segmentation plays an important role in the diagnosis of eye diseases and is considered as one of the most challenging tasks in computer-aided diagnosis (CAD) systems. The main goal of this study was to propose a method for blood-vessel segmentation that could deal with the problem of detecting vessels of varying diameters in high- and low-resolution fundus images. We proposed to use the particle swarm optimization (PSO) algorithm to improve the multiscale line detection (MSLD) method. The PSO algorithm was applied to find the best arrangement of scales in the MSLD method and to handle the problem of multiscale response recombination...
May 2018: Journal of Biomedical Optics
https://www.readbyqxmd.com/read/29748646/the-effect-of-the-total-small-vessel-disease-burden-on-the-structural-brain-network
#11
Xiaopei Xu, Kui Kai Lau, Yuen Kwun Wong, Henry K F Mak, Edward S Hui
Different cerebral small vessel disease (SVD) lesion types have been shown to disrupt structural brain network individually. Considering that they often coexist, we investigated the relation between their collective effect using the recently proposed total SVD score and structural brain network on MRI in 95 patients with first transient ischemic attack (TIA) or ischemic stroke. Fifty-nine patients with and 36 without any SVD lesions were included. The total SVD score was recorded. Diffusion tensor imaging was performed to estimate structural brain connections for subsequent brain connectivity analysis...
May 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29745919/type-2-diabetes-mellitus-and-cerebral-small-vessel-disease-case-report
#12
S Sopromadze
Patients with type 2 diabetes mellitus have an increased risk of cardiovascular (CV) morbidity and mortality. Recently, brain has been described also as a target organ for diabetic microvascular complications. Cerebral small vessel disease (SVD) may cause lacunar infarcts and cognitive dysfunction. In our case a brain MRI scan showed distinct lesions, which are mainly caused and seen by long lasting diabetes and hypertension.
April 2018: Georgian Medical News
https://www.readbyqxmd.com/read/29744799/dti-derived-indexes-of-brain-wm-correlate-with-cognitive-performance-in-vascular-mci-and-small-vessel-disease-a-tbss-study
#13
Mario Mascalchi, Emilia Salvadori, Nicola Toschi, Marco Giannelli, Stefano Orsolini, Stefano Ciulli, Andrea Ginestroni, Anna Poggesi, Antonio Giorgio, Francesca Lorenzini, Marco Pasi, Nicola De Stefano, Leonardo Pantoni, Domenico Inzitari, Stefano Diciotti
Indexes derived from diffusion tensor imaging (DTI) are sensitive to changes of both T2-hyperintense and normal-appearing brain white matter (WM) in elderly subjects with variable cognitive status. We investigated correlations between global cognitive performance and DTI-derived indexes along the WM tracts in the brain of patients with vascular mild cognitive impairment (MCI) and small vessel disease (SVD). Seventy-six patients with vascular MCI and SVD were assessed through Montreal Cognitive Assessment (MoCA) and Mini Mental State Examination (MMSE) test and underwent DTI examination on a 1...
May 9, 2018: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/29740309/expression-of-cyclin-d1-in-astrocytes-varies-during-aging
#14
Brigitte Ciapa, Sylvie Granon
D-Cyclins control progression through the G1 phase and the G1/S transition of the cell cycle. In the adult brain, they regulate neurogenesis which is limited to the sub-granular zone of the dentate gyrus (DG) and to the sub-ventricular zone (SVZ) of the lateral ventricles. Yet, D-cyclins have also been detected in other parts of the adult brain in differentiated neurons that do not proliferate and rather die by apoptosis in response to cell cycle reactivation. Expression of D-cyclins in astrocytes has also been reported but published results, such as those concerning neurons, appear conflictual...
2018: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/29739911/effect-of-antihypertensive-medication-on-cerebral-small-vessel-disease-a-systematic-review-and-meta-analysis
#15
Tessa van Middelaar, Tanja E Argillander, Floris H B M Schreuder, Jaap Deinum, Edo Richard, Catharina J M Klijn
BACKGROUND AND PURPOSE: Hypertension is an important risk factor for cerebral small vessel disease. We aimed to study the effect of antihypertensive medication (AHM) on the progression of cerebral small vessel disease. METHODS: We performed a systematic literature search of electronic databases up to January 30, 2017, for randomized controlled trials on the effect of AHM on ≥1 cerebral small vessel disease magnetic resonance imaging markers (ie, white matter hyperintensities, lacunes, microbleeds, enlarged perivascular spaces, acute small subcortical infarcts, and brain atrophy) after ≥1 year...
May 8, 2018: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29736422/cerebral-microbleeds-and-blood-pressure-abnormalities-in-parkinson-s-disease
#16
Kazuo Yamashiro, Ryota Tanaka, Yasushi Shimo, Genko Oyama, Takashi Ogawa, Atsushi Umemura, Nobutaka Hattori
Blood pressure abnormalities are frequently observed in patients with Parkinson's disease (PD), and are associated with cerebrovascular diseases such as white matter hyperintensities and carotid atherosclerosis. We assessed the relationship between blood pressure abnormalities and cerebral microbleeds (CMBs), a marker of cerebral small vessel disease, in 128 patients with PD. We examined supine and orthostatic blood pressures and used 24-hour ambulatory blood pressure monitoring to assess the presence or absence of orthostatic hypotension (OH), supine hypertension (SH), nocturnal hypertension (NH), and loss of nocturnal blood pressure dips (non-dipping)...
March 2018: ENeurologicalSci
https://www.readbyqxmd.com/read/29734804/a-novel-nanoparticle-formulation-derived-from-carboxymethyl-cellulose-polyethylene-glycol-and-cabazitaxel-for-chemotherapy-delivery-to-the-brain
#17
Joseph Bteich, Mark J Ernsting, Mohammed Z Mohammed, Taira Kiyota, Trevor McKee, Mohit Trikha, Henry Lowman, Kenneth K Sokoll
Nanoparticles provide a unique opportunity to explore the benefits of selective distribution and release of cancer therapeutics at sites of disease through varying particle sizes and compositions that exploit the enhanced permeability of tumor-associated blood vessels. Though delivery of larger-as opposed to smaller and/or actively transported-molecules to the brain is prime face a challenging endeavor, we wondered whether nanoparticles could improve the therapeutic index of existing drugs for use in treating brain tumors via these vascular effects...
May 7, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29734473/treatment-for-hepatitis-c-virus-associated-mixed-cryoglobulinaemia
#18
REVIEW
Nuria Montero, Alexandre Favà, Eva Rodriguez, Clara Barrios, Josep M Cruzado, Julio Pascual, Maria Jose Soler
BACKGROUND: Hepatitis C virus (HCV)-associated mixed cryoglobulinaemia is the manifestation of an inflammation of small and medium-sized vessels produced by a pathogenic IgM with rheumatoid factor activity generated by an expansion of B-cells. The immune complexes formed precipitate mainly in the skin, joints, kidneys or peripheral nerve fibres. Current therapeutic approaches are aimed at elimination of HCV infection, removal of cryoglobulins and also of the B-cell clonal expansions. The optimal treatment for it has not been established...
May 7, 2018: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29731094/how-to-reconstruct-middle-hepatic-vein-branches-with-explanted-portal-vein-and-inferior-mesenteric-vein-graft-a-case-report
#19
S Junrungsee, W Lapisatepun, A Chotirosniramit, T Sandhu, K Udomsin, W Ko-Iam, P Chanthima, W Lapisatepun, S Boonsri, S Lorsomradee
OBJECTIVE: The middle hepatic vein reconstruction is one of the crucial parts in adult living donor liver transplantation. Numerous techniques had been reported by using cadaveric iliac vessel or synthetic graft. The limitations of reported techniques are availability of the vessel and complication of synthetic graft. We report the technique of using explanted portal vein and inferior mesenteric vein graft in sequential fashion. PATIENTS AND METHODS: The recipient was a 54-year-old man with chronic hepatitis B cirrhosis and multiple hepatocellular carcinomas...
May 2018: Transplantation Proceedings
https://www.readbyqxmd.com/read/29730328/poor-subpleural-perfusion-predicts-failure-after-balloon-pulmonary-angioplasty-for-non-operable-chronic-thromboembolic-pulmonary-hypertension
#20
Yu Taniguchi, Philippe Brenot, Xavier Jais, Carlos Garcia, Jason Weatherald, Olivier Planche, Elie Fadel, Marc Humbert, Gérald Simonneau
BACKGROUND: Poor subpleural perfusion (PSP) in the capillary phase of pulmonary angiography predicts worse outcomes after pulmonary endarterectomy in operable chronic thromboembolic pulmonary hypertension (CTEPH). Balloon pulmonary angioplasty (BPA) has emerged for non-operable CTEPH. We assessed the association between PSP and BPA failure. METHOD: Subpleural perfusion was classified as poor (defined as subpleural spaces either not or minimally perfused in all segments) or normal...
May 3, 2018: Chest
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