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Amyloid in blood

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https://www.readbyqxmd.com/read/29787428/use-of-proteomic-and-hematology-biomarkers-for-prediction-of-hematopoietic-acute-radiation-syndrome-severity-in-baboon-radiation-models
#1
William F Blakely, David L Bolduc, Jeff Debad, George Sigal, Matthias Port, Michael Abend, Marco Valente, Michel Drouet, Francis Hérodin
Use of plasma proteomic and hematological biomarkers represents a promising approach to provide useful diagnostic information for assessment of the severity of hematopoietic acute radiation syndrome. Eighteen baboons were evaluated in a radiation model that underwent total-body and partial-body irradiations at doses of Co gamma rays from 2.5 to 15 Gy at dose rates of 6.25 cGy min and 32 cGy min. Hematopoietic acute radiation syndrome severity levels determined by an analysis of blood count changes measured up to 60 d after irradiation were used to gauge overall hematopoietic acute radiation syndrome severity classifications...
July 2018: Health Physics
https://www.readbyqxmd.com/read/29786594/-brain-microbleeds-definition-pathophysiology-and-the-consequences
#2
Marek Mazurek, Ewa Papuć, Konrad Rejdak
Brain microbleeds are defined as small, circular hypointense changes in T2-sequensec of brain MRI, well demarcated from the surrounding tissue. They represent the phagocytized products of blood distribution extravasated from pathologically altered vessels. The echo-T2-dependent gradient (GRE) and magnetic susceptibility testing (SWI) sequences are usually used to visualize them. The pathogenesis of microbleeds very complex but angiopathy associated with arterial hypertension and cerebral amyloid angiopathy play a special role...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29782249/-transthyretin-amyloidosis-in-a-cohort-of-old-and-very-old-patients-with-chronic-heart-failure
#3
A A Poliakova, E N Semernin, M Y Sitnikova, K L Аvagyan, R V Grozov, S A Pyko, A N Krutikov, V G Davydova, K A Khmelnitskaya, M M Shavloskii, D E Korzhevskii, A Y Gudkova
BACKGROUND: Life-time diagnostics of wild type transthyretin amyloidosis (ATTR(wt)-amyloidosis) is virtually absent, even though ATTR(wt)-amyloidosis is an underestimated cause for morbidity and mortality, particularly in the older age group. AIM: To study incidence, demographic characteristics, and morpho-functional features of ATTR(wt)-amyloidosis in patients with FC IV CHF and LV hypertrophy > 15 mm according to autopsy data. MATERIALS AND METHODS: Postmortem reports were retrospectively analyzed for patients (n=141; 19 % males, 81 % females) of cardiology departments aged ≥69 with the underlying CHF syndrome...
2018: Kardiologiia
https://www.readbyqxmd.com/read/29780554/mechanistic-perspective-and-functional-activity-of-insulin-in-amylin-aggregation
#4
Michal Baram, Sharon Gilead, Ehud Gazit, Yifat Miller
Insulin is a key regulatory polypeptide that is secreted from pancreatic β-cells and has several important effects on the synthesis of lipids, regulation of enzymatic activities, blood glucose levels and the prevention of hyperglycemia. Insulin was demonstrated to self-assemble into ordered amyloid fibrils upon repeated injections, although the possible biological significance of the supramolecular structures is enigmatic. Amylin is also an amyloidogenic polypeptide that is secreted from pancreatic β-cells and plays an important role in glycemic regulation preventing post-prandial spikes in blood glucose levels...
May 14, 2018: Chemical Science
https://www.readbyqxmd.com/read/29779881/failure-of-tafamidis-to-halt-progression-of-ala36pro-ttr-oculomeningovascular-amyloidosis
#5
Fabrizio Salvi, Roberto Volpe, Francesca Pastorelli, Andrea Bianchi, Alessandra Vella, Claudio Rapezzi, Mario Mascalchi
Oculomeningovascular amyloidosis is a variant of transthyretin (TTR) amyloidotic polyneuropathy, which is associated with blindness and brain ischemia, microhemorrages, and siderosis due to prominent production of the abnormal TTR in the eye and in the choroid plexuses. Tafamidis is a TTR stabilizer that is orally administered and, by interfering with amyloid fibril formation and deposition, is capable of slowing progression of TTR polyneuropathy and of early-stage cardiomyopathy. However, the ocular manifestations of amyloid deposition progressed despite tafamidis therapy in Val30Met TTR amyloidosis, and the effects of tafamidis on meningovascular amyloidosis are unknown...
May 17, 2018: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29778472/effects-of-ad-libitum-milk-replacer-feeding-and-butyrate-supplementation-on-behavior-immune-status-and-health-of-holstein-calves-in-the-postnatal-period
#6
C Gerbert, D Frieten, C Koch, G Dusel, K Eder, T Stefaniak, J Bajzert, P Jawor, A Tuchscherer, H M Hammon
Animal welfare in dairy calf husbandry depends on calf rearing and is probably improved by intensive milk feeding programs. In addition, butyrate supplementation in milk replacer (MR) stimulates postnatal growth and may affect the immune system in calves. We have investigated the combined effects of ad libitum MR feeding and butyrate supplementation on feeding behavior, health, and the immune responses in calves. Holstein calves (n = 64) were examined from birth until wk 11 of age. Calves received MR either ad libitum (Adl) or restrictively (Res) with (AdlB+, ResB+) or without (AdlB-, ResB-) 0...
May 16, 2018: Journal of Dairy Science
https://www.readbyqxmd.com/read/29777753/characterization-of-impaired-cerebrovascular-structure-in-app-ps1-mouse-brains
#7
Kee-Chan Ahn, Cameron R Learman, Gary L Dunbar, Panchanan Maiti, Won-Cheoul Jang, Hyeon-Cheol Cha, Mee-Sook Song
Alzheimer's disease (AD) is defined by senile plaques, tauopathy and neuronal cell death in specific area of the brain. Recent studies suggest that neurovascular dysfunction may be an integral part of AD pathogenesis, contributing to the onset and development of AD pathologies such as neuronal death, inflammatory response, and breakdown of blood brain barrier (BBB). In addition, vascular complications caused by age-related metabolic diseases such as diabetes and high blood pressure have high incidence in development of dementia and AD...
May 16, 2018: Neuroscience
https://www.readbyqxmd.com/read/29775082/profile-of-renal-aa-amyloidosis-in-older-and-younger-individuals-a-single-centre-experience
#8
Siyar Erdogmus, Zeynep Kendi Celebi, Serkan Akturk, Gizem Kumru, Neval Duman, Kenan Ates, Sehsuvar Erturk, Gokhan Nergizoglu, Sim Kutlay, Sule Sengul, Kenan Keven
OBJECTIVE: In epidemiological studies of amyloid A (AA) amyloidosis from Turkey, the most frequently cause was familial Mediterranean fever (FMF) and it occurs generally in young age population. However, there are no sufficient data regarding aetiology, clinical presentation and prognosis of renal AA amyloidosis in advanced age patients. In this study, we aimed to investigate demographic, clinical presentation, aetiology and outcomes of adults aged 60 years or older patients with biopsy-proven renal AA amyloidosis...
May 18, 2018: Amyloid: the International Journal of Experimental and Clinical Investigation
https://www.readbyqxmd.com/read/29775005/-determination-and-significance-of-serum-mpo-and-amylin-in-adult-patients-with-osahs-after-short-range-noninvasive-positive-pressure-ventilation
#9
X H Chen, P J Chen, Y Long, Q P Huang
Objective: The aim of this study to investigate the determination and significance of serum MPO and amylin in adult patients with OSAHS after short-range noninvasive positive pressure ventilation. Method: Eighty-seven OSAHS patients were divided into severe group (30 cases), moderate group (30 cases) and mild group (27 cases) according to the AHI range. Twenty-seven outpatient health persons were selected as the control group. Serum amylin and myeloperoxidase were measured by ELISA; Amyloid and myeloperoxidase were reassessed in 30 patients with severe OSAHS after 6 months of combined therapy, and the relationship between amylin, myeloperoxidase and PSG was analyzed...
June 5, 2017: Journal of Clinical Otorhinolaryngology, Head, and Neck Surgery
https://www.readbyqxmd.com/read/29774542/accelerated-pre-senile-systemic-amyloidosis-in-pacap-knockout-mice-a-protective-role-of-pacap-in-age-related-degenerative-processes
#10
Dora Reglodi, Adel Jungling, Rémi Longuespée, Joerg Kriegsmann, Rita Casadonte, Mark Kriegsmann, Tamas Juhasz, Sebastian Bardosi, Andrea Tamas, Balazs Daniel Fulop, Krisztina Kovacs, Zsuzsanna Nagy, Jason Sparks, Attila Miseta, Gabriel Mazzucchelli, Hitoshi Hashimoto, Attila Bardosi
Dysregulation of neuropeptides may play an important role in aging-induced impairments. Among them, pituitary adenylate cyclase activating polypeptide (PACAP) is a potent cytoprotective peptide that provides an endogenous control against a variety of tissue-damaging stimuli. We hypothesized that the progressive decline of PACAP throughout life, and the well-known general cytoprotective effects of PACAP lead to age-related pathophysiological changes in PACAP deficiency, supported by the increased vulnerability to various stressors of animals partially or totally lacking PACAP...
May 17, 2018: Journal of Pathology
https://www.readbyqxmd.com/read/29760662/targeting-renin-angiotensin-system-against-alzheimer-s-disease
#11
REVIEW
Abadi Kahsu Gebre, Birhanetensay Masresha Altaye, Tesfay Mehari Atey, Kald Beshir Tuem, Derbew Fikadu Berhe
Renin Angiotensin System (RAS) is a hormonal system that regulates blood pressure and fluid balance through a coordinated action of renal, cardiovascular, and central nervous systems. In addition to its hemodynamic regulatory role, RAS involves in many brain activities, including memory acquisition and consolidation. This review has summarized the involvement of RAS in the pathology of Alzheimer's disease (AD), and the outcomes of treatment with RAS inhibitors. We have discussed the effect of brain RAS in the amyloid plaque (Aβ) deposition, oxidative stress, neuroinflammation, and vascular pathology which are directly and indirectly associated with AD...
2018: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/29759140/the-involvement-of-neuroinflammation-and-necroptosis-in-the-hippocampus-during-vascular-dementia
#12
Mourad Belkhelfa, Narimene Beder, Daya Mouhoub, Manel Amri, Rafa Hayet, Nabila Tighilt, Souad Bakheti, Soraya Laimouche, Djamel Azzouz, Rachid Belhadj, Chafia Touil-Boukoffa
The prevalence of vascular dementia is increasing at an alarming rate. The Confirmation of the clinical diagnosis of vascular dementia depends on post-mortem examination of the brain. In our study, we investigated the vascular disease and neuroinflammation during vascular dementia. Our results showed a β-amyloid deposits, neovascularization, neuronal hypertrophy and neuroinflammation in the hippocampus tissue. Interestingly, the neuroinflammation was characterized by a higher expression of TNF-α, IL-1β, TGF-β and iNOS which are TLR4/RelA pathway dependent...
July 15, 2018: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/29755842/lipopolysaccharide-endotoxemia-induces-amyloid-%C3%AE-and-p-tau-formation-in-the-rat-brain
#13
Li-Ming Wang, Qi Wu, Ryan A Kirk, Kevin P Horn, Ahmed H Ebada Salem, John M Hoffman, Jeffrey T Yap, Joshua A Sonnen, Rheal A Towner, Fernando A Bozza, Rosana S Rodrigues, Kathryn A Morton
Amyloid beta (Aβ) plaques are not specific to Alzheimer's disease and occur with aging and neurodegenerative disorders. Soluble brain Aβ may be neuroprotective and increases in response to neuroinflammation. Sepsis is associated with neurocognitive compromise. The objective was to determine, in a rat endotoxemia model of sepsis, whether neuroinflammation and soluble Aβ production are associated with Aβ plaque and hyperphosphorylated tau deposition in the brain. Male Sprague Dawley rats received a single intraperitoneal injection of 10 mg/kg of lipopolysaccharide endotoxin (LPS)...
2018: American Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/29749416/novel-chelators-based-on-adamantane-derived-semicarbazones-and-hydrazones-that-target-multiple-hallmarks-of-alzheimer-s-disease
#14
Duraippandi Palanimuthu, Zhixuan Wu, Patric J Jansson, Nady Braidy, Paul V Bernhardt, Des R Richardson, Danuta S Kalinowski
Alzheimer's disease (AD) is characterized by multiple pathological hallmarks, including β-amyloid aggregation, oxidative stress, and metal dys-homeostasis. In the absence of treatments addressing its multi-factorial pathology, we designed novel multi-functional adamantane-based semicarbazones and hydrazones (1-12) targeting AD hallmarks. Of these, 2-pyridinecarboxaldehyde (N-adamantan-1-yl)benzoyl-4-amidohydrazone (10) was identified as the lead compound, which demonstrated: (1) pronounced iron chelation efficacy; (2) attenuation of CuII-mediated β-amyloid aggregation; (3) low cytotoxicity; (4) inhibition of oxidative stress; and (5) favorable characteristics for effective blood-brain barrier permeation...
May 11, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29745864/modulation-of-the-expression-of-genes-related-to-the-system-of-amyloid-beta-metabolism-in-the-brain-as-a-novel-mechanism-of-ceftriaxone-neuroprotective-properties
#15
Maria A Tikhonova, Tamara G Amstislavskaya, Victor M Belichenko, Larisa A Fedoseeva, Sergey P Kovalenko, Ekaterina E Pisareva, Alla S Avdeeva, Nataliya G Kolosova, Nikolai D Belyaev, Lyubomir I Aftanas
BACKGROUND: The dominant hypothesis about the pathogenesis of Alzheimer's disease (AD) is the "amyloid cascade" concept and modulating the expression of proteins involved in the metabolism of amyloid-beta (Aβ) is proposed as an effective strategy for the prevention and therapy of AD. Recently, we found that an antibiotic ceftriaxone (CEF), which possesses neuroprotective activity, reduced cognitive deficits and neurodegenerative changes in OXYS rats, a model of sporadic AD...
April 19, 2018: BMC Neuroscience
https://www.readbyqxmd.com/read/29740283/transplantation-of-human-menstrual-blood-derived-mesenchymal-stem-cells-alleviates-alzheimer-s-disease-like-pathology-in-app-ps1-transgenic-mice
#16
Yongjia Zhao, Xin Chen, Yichen Wu, Yanling Wang, Yifei Li, Charlie Xiang
Extracellular β-amyloid (Aβ) plaques and neurofibrillary tangles (NFTs) are the pathological hallmarks of Alzheimer's disease (AD). Mesenchymal stem cells (MSCs) have shown therapeutic efficacy in many neurodegenerative diseases, including AD. Human menstrual blood-derived stem cells (MenSCs) are a novel source of MSCs advantageous for their higher proliferation rate and because they are easy to obtain without ethical concerns. Although MenSCs have exhibited therapeutic efficacy in some diseases, their effects on AD remain elusive...
2018: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29739861/molecular-biomarkers-of-alzheimer-s-disease-progress-and-prospects
#17
REVIEW
Tammaryn Lashley, Jonathan M Schott, Philip Weston, Christina E Murray, Henny Wellington, Ashvini Keshavan, Sandrine C Foti, Martha Foiani, Jamie Toombs, Jonathan D Rohrer, Amanda Heslegrave, Henrik Zetterberg
The neurodegenerative disorder Alzheimer's disease is characterised by the formation of β-amyloid plaques and neurofibrillary tangles in the brain parenchyma, which cause synapse and neuronal loss. This leads to clinical symptoms, such as progressive memory deficits. Clinically, these pathological changes can be detected in the cerebrospinal fluid and with brain imaging, although reliable blood tests for plaque and tangle pathologies remain to be developed. Plaques and tangles often co-exist with other brain pathologies, including aggregates of transactive response DNA-binding protein 43 and Lewy bodies, but the extent to which these contribute to the severity of Alzheimer's disease is currently unknown...
May 8, 2018: Disease Models & Mechanisms
https://www.readbyqxmd.com/read/29738349/a-pilot-study-of-pancreatic-islet-amyloid-pet-imaging-with-18f-fddnp
#18
Zhi Lu, Jinghui Xie, Ran Yan, Zilin Yu, Zhigang Sun, Fei Yu, Xiaoyan Gong, Hongbo Feng, Jing Lu, Yanjun Zhang
OBJECTIVES: Pancreatic islet amyloid deposition occurs before β-cell damage in type 2 diabetes mellitus patients. The islet and Alzheimer's disease β-amyloid shares similar secondary structures. The Alzheimer's disease β-amyloid targeting tracer [F]FDDNP could be used to image pancreatic islet amyloid with PET. PATIENTS AND METHODS: Consecutive pancreatic tissue sections from a 69-year-old male type 2 diabetes mellitus patient were stained by hematoxylin and eosin, anti-amylin antibody, Congo Red, periodic acid-Schiff, and [F]FDDNP reference compound, respectively...
May 5, 2018: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/29734664/blood-ammonia-as-a-possible-etiological-agent-for-alzheimer-s-disease
#19
REVIEW
Yan Yan Jin, Parul Singh, Hea-Jong Chung, Seong-Tschool Hong
Alzheimer’s disease (AD), characterized by cognitive decline and devastating neurodegeneration, is the most common age-related dementia. Since AD is a typical example of a complex disease that is affected by various genetic and environmental factors, various factors could be involved in preventing and/or treating AD. Extracellular accumulation of beta-amyloid peptide (Aβ) and intracellular accumulation of tau undeniably play essential roles in the etiology of AD. However, interestingly enough, medications targeting Aβ or tau all failed and the only clinically efficient medications for AD are drugs targeting the cholinergic pathway...
May 4, 2018: Nutrients
https://www.readbyqxmd.com/read/29729985/novel-8-hydroxyquinoline-derivatives-targeting-%C3%AE-amyloid-aggregation-metal-chelation-and-oxidative-stress-against-alzheimer-s-disease
#20
Xuelian Yang, Pei Cai, Qiaohong Liu, Jiajia Wu, Yong Yin, Xiaobing Wang, Lingyi Kong
A series of multitargeted 8-hydroxyquinoline derivatives were designed and synthesized for the treatment of Alzheimer's disease (AD). In vitro studies indicated that most of the prepared compounds exhibited significant inhibitory effects against self-induced Aβ1-42 aggregation and potential antioxidant properties especially compound 5b (IC50  = 5.64 μM for self-induced Aβ aggregation; the oxygen radical absorbance capacity using fluorescein (ORAC-FL) value is 2.63 Trolox equivalents). Notably, 5b can chelate biometals and inhibit Cu2+ /Zn2+ -induced Aβ1-42 aggregation...
April 22, 2018: Bioorganic & Medicinal Chemistry
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