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https://www.readbyqxmd.com/read/28951472/ebola-virus-binding-to-tim-1-on-t-lymphocytes-induces-a-cytokine-storm
#1
Patrick Younan, Mathieu Iampietro, Andrew Nishida, Palaniappan Ramanathan, Rodrigo I Santos, Mukta Dutta, Ndongala Michel Lubaki, Richard A Koup, Michael G Katze, Alexander Bukreyev
Ebola virus (EBOV) disease (EVD) results from an exacerbated immunological response that is highlighted by a burst in the production of inflammatory mediators known as a "cytokine storm." Previous reports have suggested that nonspecific activation of T lymphocytes may play a central role in this phenomenon. T-cell immunoglobulin and mucin domain-containing protein 1 (Tim-1) has recently been shown to interact with virion-associated phosphatidylserine to promote infection. Here, we demonstrate the central role of Tim-1 in EBOV pathogenesis, as Tim-1(-/-) mice exhibited increased survival rates and reduced disease severity; surprisingly, only a limited decrease in viremia was detected...
September 26, 2017: MBio
https://www.readbyqxmd.com/read/28851448/dietary-arachidonic-acid-increases-deleterious-effects-of-amyloid-%C3%AE-oligomers-on-learning-abilities-and-expression-of-ampa-receptors-putative-role-of-the-acsl4-cpla2-balance
#2
Mélanie H Thomas, Cédric Paris, Mylène Magnien, Julie Colin, Sandra Pelleïeux, Florence Coste, Marie-Christine Escanyé, Thierry Pillot, Jean-Luc Olivier
BACKGROUND: Polyunsaturated fatty acids play a crucial role in neuronal function, and the modification of these compounds in the brain could have an impact on neurodegenerative diseases such as Alzheimer's disease. Despite the fact that arachidonic acid is the second foremost polyunsaturated fatty acid besides docosahexaenoic acid, its role and the regulation of its transfer and mobilization in the brain are poorly known. METHODS: Two groups of 39 adult male BALB/c mice were fed with an arachidonic acid-enriched diet or an oleic acid-enriched diet, respectively, for 12 weeks...
August 29, 2017: Alzheimer's Research & Therapy
https://www.readbyqxmd.com/read/28807933/mice-deficient-in-lysophosphatidic-acid-acyltransferase-%C3%AE-lpaat%C3%AE-acylglycerophosphate-acyltransferase-4-agpat4-have-impairments-in-spatial-learning-and-memory-associated-with-reductions-in-nmda-and-ampa-receptors
#3
Ryan M Bradley, Emily B Mardian, Darin Bloemberg, Juan J Aristizabal Henao, Andrew S Mitchell, Phillip M Marvyn, Katherine A Moes, Ken D Stark, Joe Quadrilatero, Robin E Duncan
We previously characterized LPAATδ/AGPAT4 as a mitochondrial lysophosphatidic acid acyltransferase that regulates brain levels of phosphatidylcholine (PC), phosphatidylethanolamine (PE), and phosphatidylinositol (PI). Here we report that Lpaatδ (-/-) mice display impaired spatial learning and memory compared to wildtype littermates in the Morris Water Maze, and investigated potential mechanisms associated with brain phospholipid changes. Marker protein immunoblotting suggested that the relative brain content of neurons, glia, and oligodendrocytes was unchanged...
August 14, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28509615/mining-of-a-phospholipase-d-and-its-application-in-enzymatic-preparation-of-phosphatidylserine
#4
Wen-Bin Zhou, Jin-Song Gong, Hai-Juan Hou, Heng Li, Zhen-Ming Lu, Hong-Yu Xu, Zheng-Hong Xu, Jin-Song Shi
Phosphatidylserine (PS) is useful as the additive in industries for memory improvement, mood enhancement and drug delivery. Conventionally, PS was extracted from soybeans, vegetable oils, egg yolk, and biomass; however, their low availability and high extraction cost were limiting factors. Phospholipase D (PLD) is a promising tool for enzymatic synthesis of PS due to its transphosphatidylation activity. In this contribution, a new and uncharacterized PLD was first obtained from GenBank database via genome mining strategy...
May 16, 2017: Bioengineered
https://www.readbyqxmd.com/read/28235468/lipid-mapping-of-the-rat-brain-for-models-of-disease
#5
J Martínez-Gardeazabal, E González de San Román, M Moreno-Rodríguez, A Llorente-Ovejero, I Manuel, R Rodríguez-Puertas
Lipids not only constitute the primary component of cellular membranes and contribute to metabolism but also serve as intracellular signaling molecules and bind to specific membrane receptors to control cell proliferation, growth and convey neuroprotection. Over the last several decades, the development of new analytical techniques, such as imaging mass spectrometry (IMS), has contributed to our understanding of their involvement in physiological and pathological conditions. IMS allows researchers to obtain a wide range of information about the spatial distribution and abundance of the different lipid molecules that is crucial to understand brain functions...
September 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/27916687/a-unique-combination-of-micronutrients-rejuvenates-cognitive-performance-in-aged-mice
#6
Sam D Perez, Kristy Du, Catarina Rendeiro, Lin Wang, Qian Wu, Stanislav S Rubakhin, Rema Vazhappilly, Jeffrey H Baxter, Jonathan V Sweedler, Justin S Rhodes
It is widely believed that diet can influence the onset and severity of cognitive aging, but the optimal combination of micronutrients and molecular and cellular mechanisms remain elusive. The purpose of this study was to compare the effects of eight distinct diets, consisting of various concentrations of selected micronutrients, on learning and memory as well as markers of neuronal plasticity, and metabolic and neuro-immune status of the aged hippocampus. Eighteen-month-old male and female C57BL/6J mice were fed the diets for 16 weeks, followed by learning and memory trials on the active avoidance task...
December 2, 2016: Behavioural Brain Research
https://www.readbyqxmd.com/read/27610267/isolation-and-analysis-of-phospholipids-in-dairy-foods
#7
REVIEW
Lígia Pimentel, Ana Gomes, Manuela Pintado, Luis Miguel Rodríguez-Alcalá
The lipid fraction of milk is one of the most complex matrixes in foodstuffs due to the presence of a high number of moieties with different physical and chemical properties. Glycerolipids include glycerol and two fatty acids esterified in positions sn-1 and sn-2 with higher concentration of unsaturated fatty acids than in the triglyceride fraction of milk. Sphingolipids consist of a sphingoid base linked to a fatty acid across an amide bond. Their amphiphilic nature makes them suitable to be added into a variety of foods and recent investigations show that phospholipids, mainly phosphatidylserine and sphingomyelin, can exert antimicrobial, antiviral, and anticancer activities as well as positive effects in Alzheimer's disease, stress, and memory decline...
2016: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/27522103/unresolved-clinical-aspects-and-safety-hazards-of-blood-derived-ev-mv-in-stored-blood-components-from-personal-memory-lanes-to-newer-perspectives-on-the-roles-of-ev-mv-in-various-biological-phenomena
#8
REVIEW
Jerard Seghatchian, Jean Amiral
Blood cells generate heterogeneous populations of vesicles that are delivered, as small-specialized packages of highly active cell fragments in blood circulation, having almost similar functional activities, as the mother cells. These so called extracellular vesicles are the essential part of an energy-dependent natural apoptotic process; hence their beneficial and harmful biological functions cannot be ignored. Evidence is accumulating, that cellular derived vesicles, originate from all viable cells including: megakaryocytes, platelets, red blood cells, white blood cells and endothelial cells, the highest in proportions from platelets...
August 2016: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/27388114/amelioration-of-scopolamine-induced-amnesia-by-phosphatidylserine-and-curcumin-in-the-day-old-chick
#9
Teresa A Barber, Edward M Edris, Paul J Levinsky, Justin M Williams, Ari R Brouwer, Shawn A Gessay
In the one-trial taste-avoidance task in day-old chicks, acetylcholine receptor activation has been shown to be important for memory formation. Injection of scopolamine produces amnesia, which appears to be very similar in type to that of Alzheimer's disease, which is correlated with low levels of acetylcholine in the brain. Traditional pharmacological treatments of Alzheimer's disease, such as cholinesterase inhibitors and glutamate receptor blockers, improve memory and delay the onset of impairments in memory compared with placebo controls...
September 2016: Behavioural Pharmacology
https://www.readbyqxmd.com/read/27318722/echocardiographic-ischemic-memory-imaging-through-complement-mediated-vascular-adhesion%C3%A2-of-phosphatidylserine-containing-microbubbles
#10
Brian Mott, William Packwood, Aris Xie, J Todd Belcik, Ronald P Taylor, Yan Zhao, Brian P Davidson, Jonathan R Lindner
OBJECTIVES: This study hypothesized that microvascular retention of phosphatidylserine-containing microbubbles (MB-PS) would allow detection of recent but resolved myocardial ischemia with myocardial contrast echocardiographic (MCE) molecular imaging. BACKGROUND: Techniques for ischemic memory imaging which can detect and spatially assess resolved myocardial ischemia are being developed for rapid evaluation of patients with chest pain. METHODS: MCE molecular imaging with MB-PS was performed 1...
August 2016: JACC. Cardiovascular Imaging
https://www.readbyqxmd.com/read/26867200/dha-supplementation-alone-or-in-combination-with-other-nutrients-does-not-modulate-cerebral-hemodynamics-or-cognitive-function-in-healthy-older-adults
#11
RANDOMIZED CONTROLLED TRIAL
Philippa A Jackson, Joanne S Forster, J Gordon Bell, James R Dick, Irene Younger, David O Kennedy
A number of recent trials have demonstrated positive effects of dietary supplementation with the omega-3 polyunsaturated fatty acids (n-3 PUFAs), docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA) on measures of cognitive function in healthy young and older adults. One potential mechanism by which EPA, and DHA in particular, may exert these effects is via modulation of cerebral hemodynamics. In order to investigate the effects of DHA alone or provided as one component of a multinutrient supplement (also including Gingko biloba, phosphatidylserine and vitamins B₉ and B₁₂) on measures of cerebral hemodynamics and cognitive function, 86 healthy older adults aged 50-70 years who reported subjective memory deficits were recruited to take part in a six month daily dietary supplementation trial...
February 9, 2016: Nutrients
https://www.readbyqxmd.com/read/26374445/mitochondrial-modulators-improve-lipid-composition-and-attenuate-memory-deficits-in-experimental-model-of-huntington-s-disease
#12
COMPARATIVE STUDY
Arpit Mehrotra, Abhilasha Sood, Rajat Sandhir
3-Nitropropionic acid (3-NP) is an irreversible inhibitor of succinate dehydrogenase and induces neuropathological changes similar to those observed in Huntington's disease (HD). The objective of the present study was to investigate neuroprotective effect of mitochondrial modulators; alpha-lipoic acid (ALA) and acetyl-L-carnitine (ALCAR) on 3-NP-induced alterations in mitochondrial lipid composition, mitochondrial structure and memory functions. Experimental model of HD was developed by administering 3-NP at sub-chronic doses, twice daily for 17 days...
December 2015: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/26345866/effect-of-phosphatidylserine-on-memory-in-patients-and-rats-with-alzheimer-s-disease
#13
Y Y Zhang, L Q Yang, L M Guo
The aim of this study was to investigate the effect of phosphatidylserine (PS) on memory of patients and rats with Alzheimer's disease (AD). In total, 57 AD patients were recruited from our hospital, and were divided into two groups: 25 in the control group and 32 in the observation group. Next, 300 mg/d of PS was given to the rats in the observation group for 12 continuous weeks based on the control group. AD rats were divided into three groups: control group, PS 30 mg/kg group, and PS 15 mg/kg group. Learning memory ability and free radical levels in the brain were detected after treatment...
2015: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/25933483/phosphatidylserine-and-the-human-brain
#14
REVIEW
Michael J Glade, Kyl Smith
OBJECTIVE: The aim of this study was to assess the roles and importance of phosphatidylserine (PS), an endogenous phospholipid and dietary nutrient, in human brain biochemistry, physiology, and function. METHODS: A scientific literature search was conducted on MEDLINE for relevant articles regarding PS and the human brain published before June 2014. Additional publications were identified from references provided in original papers; 127 articles were selected for inclusion in this review...
June 2015: Nutrition
https://www.readbyqxmd.com/read/25414047/positive-effects-of-soy-lecithin-derived-phosphatidylserine-plus-phosphatidic-acid-on-memory-cognition-daily-functioning-and-mood-in-elderly-patients-with-alzheimer-s-disease-and-dementia
#15
RANDOMIZED CONTROLLED TRIAL
Margret I Moré, Ulla Freitas, David Rutenberg
INTRODUCTION: We report previously unpublished, early pilot studies performed with a brain-health food supplement containing a proprietary blend of 100 mg phosphatidylserine (PS) and 80 mg phosphatidic acid (PA) produced from soy lecithin. METHODS: Serum analysis after single PS+PA ingestion was performed in healthy volunteers. A 3-month double-blind, placebo-controlled study assessed the influence of three PS+PA capsules/day, (300 mg PS + 240 mg PA/day) or placebo on memory and mood in functioning, non-depressive elderly people with memory problems, using the Wechsler Memory Scale and the List of Depressive Symptoms...
December 2014: Advances in Therapy
https://www.readbyqxmd.com/read/25301832/relation-of-antiphospholipid-antibodies-to-postmortem-brain-infarcts-in-older-people
#16
Zoe Arvanitakis, Robin L Brey, Jacob H Rand, Julie A Schneider, Ana W Capuano, Lei Yu, Sue E Leurgans, David A Bennett, Steven R Levine
BACKGROUND: There are few data on the relationship of antiphospholipid antibodies (aPLs) to pathologically proven brain infarcts. We tested the hypothesis that aPLs are associated with a higher odds of brain infarcts among older, community-dwelling individuals who came to autopsy. METHODS AND RESULTS: Specimens and clinical and pathological data were derived from 607 deceased subjects (mean age at death, 89 years; 66% women) who were participating in 1 of 2 cohort studies of aging (Rush Memory and Aging Project and Religious Orders Study) and had agreed to brain autopsy...
January 13, 2015: Circulation
https://www.readbyqxmd.com/read/25058912/oral-administration-of-squid-lecithin-transphosphatidylated-phosphatidylserine-improves-memory-impairment-in-aged-rats
#17
Bombi Lee, Bong-Jun Sur, Jeong-Jun Han, Insop Shim, Song Her, Yang-Seok Lee, Hye-Jung Lee, Dae-Hyun Hahm
Recently, lecithin-derived phosphatidylserine (PS), which originates from marine life, has received much attention as a viable alternative to bovine cerebral cortex PS. In this study, the use of squid phosphatidylcholine-transphosphatidylated PS (SQ-PS) was evaluated through examination of its ameliorating effects on age-associated learning and memory deficits in rats. Aged rats were orally administered SQ-PS (10, 20, or 50 mg/kg per day) once a day for seven days 30 min prior to behavioral assessment in a Morris water maze...
January 2, 2015: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/24992464/phosphatidylserine-in-the-brain-metabolism-and-function
#18
REVIEW
Hee-Yong Kim, Bill X Huang, Arthur A Spector
Phosphatidylserine (PS) is the major anionic phospholipid class particularly enriched in the inner leaflet of the plasma membrane in neural tissues. PS is synthesized from phosphatidylcholine or phosphatidylethanolamine by exchanging the base head group with serine, and this reaction is catalyzed by phosphatidylserine synthase 1 and phosphatidylserine synthase 2 located in the endoplasmic reticulum. Activation of Akt, Raf-1 and protein kinase C signaling, which supports neuronal survival and differentiation, requires interaction of these proteins with PS localized in the cytoplasmic leaflet of the plasma membrane...
October 2014: Progress in Lipid Research
https://www.readbyqxmd.com/read/24706780/molecular-mechanism-for-differential-recognition-of-membrane-phosphatidylserine-by-the-immune-regulatory-receptor-tim4
#19
Gregory T Tietjen, Zhiliang Gong, Chiu-Hao Chen, Ernesto Vargas, James E Crooks, Kathleen D Cao, Charles T R Heffern, J Michael Henderson, Mati Meron, Binhua Lin, Benot Roux, Mark L Schlossman, Theodore L Steck, Ka Yee C Lee, Erin J Adams
Recognition of phosphatidylserine (PS) lipids exposed on the extracellular leaflet of plasma membranes is implicated in both apoptotic cell removal and immune regulation. The PS receptor T cell immunoglobulin and mucin-domain-containing molecule 4 (Tim4) regulates T-cell immunity via phagocytosis of both apoptotic (high PS exposure) and nonapoptotic (intermediate PS exposure) activated T cells. The latter population must be removed at lower efficiency to sensitively control immune tolerance and memory cell population size, but the molecular basis for how Tim4 achieves this sensitivity is unknown...
April 15, 2014: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/24577097/phosphatidylserine-containing-omega-3-fatty-acids-may-improve-memory-abilities-in-nondemented-elderly-individuals-with-memory-complaints-results-from-an-open-label-extension-study
#20
RANDOMIZED CONTROLLED TRIAL
Veronika Vakhapova, Tzafra Cohen, Yael Richter, Yael Herzog, Yossi Kam, Amos D Korczyn
BACKGROUND: The present study is an open-label extension (OLE) aimed at evaluating the effect of 100 mg/day of phosphatidylserine enriched with docosahexaenoic acid (PS-DHA) on cognitive performance in nondemented elderly individuals with memory complaints. METHODS: From the participants who completed the core study, 122 continued with a 15-week OLE. Efficacy was assessed using a computerized tool and the Clinical Global Impression of Change (CGI-C) rating scale...
2014: Dementia and Geriatric Cognitive Disorders
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