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https://www.readbyqxmd.com/read/28528185/simvastatin-ameliorate-memory-deficits-and-inflammation-in-clinical-and-mouse-model-of-alzheimer-s-disease-via-modulating-the-expression-of-mir-106b
#1
Wenzhong Huang, Zhenyu Li, Liandong Zhao, Wei Zhao
BACKGROUND: Alzheimer's disease (AD) as a neurodegenerative brain disorder is a devastating pathology leading to disastrous cognitive impairments and dementia, and several studies have shown that AD is closely related to the inflammation, so anti-inflammatory treatment may provide therapeutic benefits. In this study, the effect of simvastatin on inflammation was investigated and the underlying mechanisms were explored. METHODS: First, we tested the effect of simvastatin on AD in clinical research...
May 18, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28526436/intracranial-il-17a-overexpression-decreases-cerebral-amyloid-angiopathy-by-upregulation-of-abca1-in-an-animal-model-of-alzheimer-s-disease
#2
Junling Yang, Jinghong Kou, Robert Lalonde, Ken-Ichiro Fukuchi
Neuroinflammation is a pervasive feature of Alzheimer's disease (AD) and characterized by activated microglia, increased proinflammatory cytokines and/or infiltrating immune cells. T helper 17 (Th17) cells are found in AD brain parenchyma and interleukin-17A (IL-17A) is identified around deposits of aggregated amyloid β protein (Aβ). However, the role of IL-17A in AD pathogenesis remains elusive. We overexpressed IL-17A in an AD mouse model via recombinant adeno-associated virus serotype 5 (rAAV5)-mediated intracranial gene delivery...
May 16, 2017: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/28523319/amyloidosis-a-rare-cause-of-refractory-heart-failure-in-a-young-female
#3
Irina Iuliana Costache, Claudia Florida Costea, Mihai Danciu, Victor Vlad Costan, Viviana Aursulesei, Gabriela FlorenŢa Dumitrescu, Mihaela Dana Turliuc, Anca Sava
Cardiac amyloidosis may occur in any type of systemic amyloidosis. The clinical picture is often characterized by restrictive cardiomyopathy. We report the case of a 41-year-old female patient admitted to the Department of Cardiology with clinical signs of right heart failure: congested jugular veins, hepatomegaly, peripheral edema, ascites associated with atrial fibrillation, low values of arterial blood pressure and oliguria. Echocardiographic findings were helpful for the diagnosis of cardiac amyloidosis: enlarged atrial cavities, normal size ventricles, thickened ventricular septum and posterior left ventricle wall with normal left ventricular ejection fraction, mitral and tricuspid regurgitation...
2017: Romanian Journal of Morphology and Embryology, Revue Roumaine de Morphologie et Embryologie
https://www.readbyqxmd.com/read/28523253/cell-therapy-products-in-alzheimer-disease
#4
REVIEW
Hyeon Jin Song, Tae-Hee Kim, Hae-Hyeog Lee, Jun-Mo Kim, Yoo Jin Park, Arum Lee, Soo Ah Kim, Hye Ji Choi
We are rapidly becoming an aging society, with the ongoing increase in challenges of the elderly. The age-related cognitive decline in accordance with aging society is of major importance in public health. Recent studies have proved the impacts of sex-steroid hormone on the brain; compliant with aging, menopause and decrease in estrogen have an effect on the occurrence and prevention of Alzheimer's disease. A new hypothesis states that Alzheimer's disease is a postmenopausal dementia, and is a negative form of estrogen deficiency...
April 2017: Journal of Menopausal Medicine
https://www.readbyqxmd.com/read/28519899/hepatic-aa-amyloidosis-in-a-cat-cytologic-and-histologic-identification-of-aa-amyloid-in-macrophages
#5
Sakurako Neo-Suzuki, Takayuki Mineshige, Junichi Kamiie, Hideki Kayanuma, Yukako Mochizuki, Masaharu Hisasue, Ryo Tsuchiya, Kinji Shirota
A 3-year-old, spayed female, Domestic Shorthair cat presented with anorexia, lethargy, vomiting, probable hemoabdomen, and multiple masses on the right lateral liver lobe. Clinicopathologic and imaging abnormalities included anemia, azotemia, icterus, and hepatomegaly with hypoechoic masses. On cytologic evaluation of a fine-needle aspiration of a liver mass there was abundant extracellular pink- to purple-colored material between hepatocytes. The amorphous material was stained with direct fast scarlet (DFS), and green birefringent areas were observed under polarized light, confirming the presence of amyloid...
May 18, 2017: Veterinary Clinical Pathology
https://www.readbyqxmd.com/read/28514851/blood-brain-barrier-penetrating-biologic-tnf-%C3%AE-inhibitor-for-alzheimer-s-disease
#6
Rudy Chang, Jillian Knox, Jae Chang, Aram Derbedrossian, Vitaly Vasilevko, David Cribbs, Ruben J Boado, William M Pardridge, Rachita Sumbria
OBJECTIVE: Tumor necrosis factor alpha (TNF-α) driven processes are involved at multiple stages of Alzheimer's disease (AD) pathophysiology and disease progression. Biologic TNF-α inhibitors (TNFIs) are the most potent class of TNFIs but cannot be developed for AD since these macromolecules do not cross the blood-brain barrier (BBB). A BBB-penetrating TNFI was engineered by the fusion of the extracellular domain of the type II human TNF receptor (TNFR) to a chimeric monoclonal antibody (MAb) against the mouse transferrin receptor (TfR), designated as the cTfRMAb-TNFR fusion protein...
May 17, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28513463/alzheimer-s-disease-against-peptides-products-of-enzymatic-cleavage-app-protein-biological-pathobiological-and-physico-chemical-properties-of-fibrillating-peptides
#7
Małgorzata Marszałek
Various peptides products of enzymatic cleavage of key for Alzheimer's disease Amyloid Precursor Protein (APP) are well known, but still are matter of scientific debate. The Aβ type products are especially challenging for experimental and medical research. This paper outlines several, still poorly known, biological and medical processes such as peptides biology, i.e., formation, biodistribution, translocation, transport and finally removal from brain compartments and body fluids like Intracellular Fluid (ICF), Cerebrospinal Fluid (CSF), Interstitial Fluid (ISF), blood serum or urine...
May 17, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28511918/molecular-imaging-of-serotonin-degeneration-in-mild-cognitive-impairment
#8
Gwenn S Smith, Frederick S Barrett, Jin Hui Joo, Najlla Nassery, Alena Savonenko, Devin J Sodums, Christopher M Marano, Cynthia A Munro, Jason Brandt, Michael A Kraut, Yun Zhou, Dean F Wong, Clifford I Workman
Neuropathological and neuroimaging studies have consistently demonstrated degeneration of monoamine systems, especially the serotonin system, in normal aging and Alzheimer's disease. The evidence for degeneration of the serotonin system in mild cognitive impairment is limited. Thus, the goal of the present study was to measure the serotonin transporter in vivo in mild cognitive impairment and healthy controls. The serotonin transporter is a selective marker of serotonin terminals and of the integrity of serotonin projections to cortical, subcortical and limbic regions, as well as the cell bodies of origin (raphe nuclei)...
May 13, 2017: Neurobiology of Disease
https://www.readbyqxmd.com/read/28503509/nicotinamide-reduces-amyloid-precursor-protein-and-presenilin-1-in-brain-tissues-of-amyloid-beta-tail-vein-injected-mice
#9
Eun Jin Kim, Soo Jin Yang
The purpose of this study is to investigate whether nicotinic acid (NA) and nicotinamide (NAM) reduce the Alzheimer disease (AD)-related gene expression in brain tissues of amyloid beta (Aβ)-injected mice. Male Crj:CD1 (ICR) mice were divided into 6 treatment groups; 1) control, 2) Aβ control, 3) Aβ + NA 20 mg/kg/day (NA20), 4) Aβ + NA40, 5) Aβ + NAM 200 mg/kg/day (NAM200), and 6) Aβ + NAM400. After 1-week acclimation period, the mice orally received NA or NAM once a day for a total of 7 successive days...
April 2017: Clinical Nutrition Research
https://www.readbyqxmd.com/read/28501671/multifunctional-liposomes-delay-phenotype-progression-and-prevent-memory-impairment-in-a-presymptomatic-stage-mouse-model-of-alzheimer-disease
#10
Simona Mancini, Claudia Balducci, Edoardo Micotti, Daniele Tolomeo, Gianluigi Forloni, Massimo Masserini, Francesca Re
The failure of clinical trials largely focused on mild to moderate stages of Alzheimer disease has suggested to the scientific community that the effectiveness of Amyloid-β (Aβ)-centered treatments should be evaluated starting as early as possible, well before irreversible brain damage has occurred. Accordingly, also the preclinical development of new therapies should be carried out taking into account this suggestion. In the present investigation we evaluated the efficacy of a treatment with liposomes multifunctionalized for crossing the blood-brain barrier and targeting Aβ, carried out on young APP/PS1 Tg mice, taken as a model of pre-symptomatic disease stage...
May 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28495580/novel-curcumin-loaded-nanoparticles-engineered-for-blood-brain-barrier-crossing-and-able-to-disrupt-abeta-aggregates
#11
Ruozi Barbara, Daniela Belletti, Francesca Pederzoli, Martina Masoni, Johannes Keller, Antonio Ballestrazzi, Maria Angela Vandelli, Giovanni Tosi, Andreas M Grabrucker
The formation of extracellular aggregates built up by deposits of β-amyloid (Aβ) is a hallmark of Alzheimer's disease (AD). Curcumin has been reported to display anti-amyloidogenic activity, not only by inhibiting the formation of new Aβ aggregates, but also by disaggregating existing ones. However, the uptake of Curcumin into the brain is severely restricted by its low ability to cross the blood-brain barrier (BBB). Therefore, novel strategies for a targeted delivery of Curcumin into the brain are highly desired...
May 8, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28478826/novel-aspects-of-defensins-involvement-in-virus-induced-autoimmunity-in-the-central-nervous-system
#12
Evangelos I Kazakos, Jannis Kountouras, Stergios A Polyzos, Georgia Deretzi
Recent research on re-circulation of interstitial fluid from the brain parenchyma to the periphery and its inferred importance in immune surveillance dysregulation are changing our conceptualization of the pathophysiology of virus-induced autoimmunity. In this context, it is necessary to reassess the immunomodulatory properties of human defensins that are variably expressed by cerebral microglia, astrocytes and choroid plexus epithelial cells and exhibit complex and often confounding roles in neuroinflammatory processes...
May 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28477083/peritoneal-dialysis-reduces-amyloid-beta-plasma-levels-in-humans-and-attenuates-alzheimer-associated-phenotypes-in-an-app-ps1-mouse-model
#13
Wang-Sheng Jin, Lin-Lin Shen, Xian-Le Bu, Wei-Wei Zhang, Si-Han Chen, Zhi-Lin Huang, Jia-Xiang Xiong, Chang-Yue Gao, Zhifang Dong, Ya-Ni He, Zhi-An Hu, Hua-Dong Zhou, Weihong Song, Xin-Fu Zhou, Yi-Zheng Wang, Yan-Jiang Wang
Clearance of amyloid-beta (Aβ) from the brain is an important therapeutic strategy for Alzheimer's disease (AD). Current studies mainly focus on the central approach of Aβ clearance by introducing therapeutic agents into the brain. In a previous study, we found that peripheral tissues and organs play important roles in clearing brain-derived Aβ, suggesting that the peripheral approach of removing Aβ from the blood may also be effective for AD therapy. Here, we investigated whether peritoneal dialysis, a clinically available therapeutic method for chronic kidney disease (CKD), reduces brain Aβ burden and attenuates AD-type pathologies and cognitive impairments...
May 5, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28476949/angiotensin-iv-receptors-mediate-the-cognitive-and-cerebrovascular-benefits-of-losartan-in-a-mouse-model-of-alzheimer-s-disease
#14
Jessika Royea, Luqing Zhang, Xin-Kang Tong, Edith Hamel
The use of angiotensin receptor blockers (ARBs) correlates with reduced onset and progression of Alzheimer's disease (AD). The mechanism depicting how ARBs, such as losartan, restore cerebrovascular and cognitive deficits in AD is unknown. Here, we propose a mechanism underlying losartan's benefits by selectively blocking the effects of Angiotensin IV (AngIV) at its receptor (AT4R) with divalinal in mice overexpressing the AD-related Swedish and Indiana mutations of the human amyloid precursor protein (APP mice) and wild-type mice...
May 5, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28475854/peripheral-complement-interactions-with-amyloid-%C3%AE-peptides-in-alzheimer-s-disease-erythrocyte-clearance-of-amyloid-%C3%AE-peptides
#15
William D Brubaker, Andrés Crane, Jenny U Johansson, Kevin Yen, Kristina Garfinkel, Diego Mastroeni, Priya Asok, Bonnie Bradt, Marwan Sabbagh, Tanya L Wallace, Courtney Glavis-Bloom, Andrea J Tenner, Joseph Rogers
INTRODUCTION: Although amyloid β peptide (Aβ) is cleared from the brain to cerebrospinal fluid and the peripheral circulation, mechanisms for its removal from blood remain unresolved. Primates have uniquely evolved a highly effective peripheral clearance mechanism for pathogens, immune adherence, in which erythrocyte complement receptor 1 (CR1) plays a major role. METHODS: Multidisciplinary methods were used to demonstrate immune adherence capture of Aβ by erythrocytes and its deficiency in Alzheimer's disease (AD)...
May 2, 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28471166/crocus-sativus-extract-tightens-the-blood-brain-barrier-reduces-amyloid-%C3%AE-load-and-related-toxicity-in-5xfad-mice
#16
Yazan S Batarseh, Sonali S Bharate, Vikas Kumar, Ajay Kumar, Ram A Vishwakarma, Sandip B Bharate, Amal Kaddoumi
Crocus sativus, commonly known as saffron or Kesar, is used in Ayurveda and other folk medicines for various purposes as an aphrodisiac, antispasmodic, and expectorant. Previous evidence suggested that Crocus sativus is linked to improving cognitive function in Alzheimer's disease (AD) patients. The aim of this study was to in vitro and in vivo investigate the mechanism(s) by which Crocus sativus exerts its positive effect against AD. The effect of Crocus sativus extract on Aβ load and related toxicity was evaluated...
May 15, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/28469550/exosomes-and-the-prion-protein-more-than-one-truth
#17
REVIEW
Alexander Hartmann, Christiane Muth, Oliver Dabrowski, Susanne Krasemann, Markus Glatzel
Exosomes are involved in the progression of neurodegenerative diseases. The cellular prion protein (PrP(C)) is highly expressed on exosomes. In neurodegenerative diseases, PrP(C) has at least two functions: It is the substrate for the generation of pathological prion protein (PrP(Sc)), a key player in the pathophysiology of prion diseases. On the other hand, it binds neurotoxic amyloid-beta (Aß) oligomers, which are associated with initiation and progression of Alzheimer's disease (AD). This has direct consequences for the role of exosomal expressed PrP(C)...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28467650/astrocyte-dysfunction-in-alzheimer-disease
#18
REVIEW
Crystal Acosta, Hope D Anderson, Christopher M Anderson
Astrocytes are glial cells that are distributed throughout the central nervous system in an arrangement optimal for chemical and physical interaction with neuronal synapses and brain blood supply vessels. Neurotransmission modulates astrocytic excitability by activating an array of cell surface receptors and transporter proteins, resulting in dynamic changes in intracellular Ca(2+) or Na(+) . Ionic and electrogenic astrocytic changes, in turn, drive vital cell nonautonomous effects supporting brain function, including regulation of synaptic activity, neuronal metabolism, and regional blood supply...
May 3, 2017: Journal of Neuroscience Research
https://www.readbyqxmd.com/read/28463572/nanoparticles-as-potential-clinical-therapeutic-agents-in-alzheimer-s-disease-focus-on-selenium-nanoparticles
#19
Mustafa Nazıroğlu, Salina Muhamad, Laszlo Pecze
In etiology of Alzheimer's disease (AD), involvement of amyloid β (Aβ) plaque accumulation and oxidative stress in the brain have important roles. Several nanoparticles such as titanium dioxide, silica dioxide, silver and zinc oxide have been experimentally using for treatment of neurological disease. In the last decade, there has been a great interest on combination of antioxidant bioactive compounds such as selenium (Se) and flavonoids with the oxidant nanoparticles in AD. We evaluated the most current data available on the physiological effects of oxidant and antioxidant nanoparticles...
May 2, 2017: Expert Review of Clinical Pharmacology
https://www.readbyqxmd.com/read/28461173/poly-adp-ribose-polymerase-1-regulates-microglia-mediated-decrease-of-endothelial-tight-junction-integrity
#20
Abbas Rezaeian Mehrabadi, Minna A Korolainen, Gary Odero G, Donald W Miller, Tiina M Kauppinen
Alzheimer's disease pathology includes, beside neuronal damage, reactive gliosis and reduced blood-brain barrier (BBB) integrity. Microglia are intimately associated with the BBB and upon AD pathology, pro-inflammatory responses of microglia could contribute to BBB damage. To study whether microglia can directly affect BBB integrity, the effects of amyloid beta (Aβ) -stimulated primary murine microglia on co-cultured mouse brain endothelial cells (bEnd3) and murine astrocyte cultures were assessed. We also assessed whether microglial phenotype modulation via poly(ADP-ribose) polymerase-1 (PARP-1) inhibition/ablation can reverse microglial impact on these BBB forming cells...
April 28, 2017: Neurochemistry International
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