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https://www.readbyqxmd.com/read/27913647/diversity-of-antiviral-igg-effector-activities-observed-in-hiv-infected-and-vaccinated-subjects
#1
Yunda Huang, Guido Ferrari, Galit Alter, Donald N Forthal, John C Kappes, George K Lewis, J Christopher Love, Bhavesh Borate, Linda Harris, Kelli Greene, Hongmei Gao, Tran B Phan, Gary Landucci, Brittany A Goods, Karen G Dowell, Hao D Cheng, Chris Bailey-Kellogg, David C Montefiori, Margaret E Ackerman
Diverse Ab effector functions mediated by the Fc domain have been commonly associated with reduced risk of infection in a growing number of nonhuman primate and human clinical studies. This study evaluated the anti-HIV Ab effector activities in polyclonal serum samples from HIV-infected donors, VAX004 vaccine recipients, and healthy HIV-negative subjects using a variety of primary and cell line-based assays, including Ab-dependent cellular cytotoxicity (ADCC), Ab-dependent cell-mediated viral inhibition, and Ab-dependent cellular phagocytosis...
December 15, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27905385/-a-role-of-genetic-factors-and-related-disorder-of-the-folate-cycle-in-ischemic-stroke
#2
V M Shklovsky, I P Lukashevich, A Yu Remennik, S M Gerasimova, G S Selishchev, D I Malin, V V Valyaeva
AIM: To study a role of MTHFR mutations and their associations with the disturbances of basic parameters of the folate cycle in the development of ischemic stroke (IS). MATERIAL AND METHODS: Fifty-one post-stroke patients, 26 women and 25 men, aged from 29 to 87 years, were included in the study. The control group consisted of 47 healthy people, 23 women and 24 men, aged from 30 to 83 years. MTHFR: rs1801131 and rs1801133 polymorphisms were genotyped. Contents of folate, B12 and homocysteine were measured...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27905104/biomarkers-of-folate-and-vitamin-b12-and-breast-cancer-risk-report-from-the-epic-cohort
#3
M Matejcic, J de Batlle, C Ricci, C Biessy, F Perrier, I Huybrechts, E Weiderpass, Boutron-Mc Ruault, C Cadeau, M His, D G Cox, H Boeing, R T Fortner, R Kaaks, P Lagiou, A Trichopoulou, V Benetou, R Tumino, S Panico, S Sieri, D Palli, F Ricceri, H B Bueno-de-Mesquita, G Skeie, P Amiano, M J Sánchez, M D Chirlaque, A Barricarte, J R Quirós, G Buckland, C H van Gils, P H Peeters, T J Key, E Riboli, B Gylling, A Zeleniuch-Jacquotte, M J Gunter, I Romieu, V Chajès
Epidemiological studies have reported inconsistent findings for the association between B vitamins and breast cancer (BC) risk. We investigated the relationship between biomarkers of folate and vitamin B12 and the risk of BC in the European Prospective Investigation into Cancer and Nutrition (EPIC) cohort. Plasma concentrations of folate and vitamin B12 were determined in 2,491 BC cases individually matched to 2,521 controls among women who provided baseline blood samples. Multivariable logistic regression models were used to estimate odds ratios by quartiles of either plasma B vitamin...
December 1, 2016: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/27904562/hyperhomocysteinemia-low-vitamin-b12-and-low-folic-acid-are-risk-factors-of-cerebral-vascular-thrombosis-in-northwest-iran
#4
Ali Akbar Taheraghdam, Nooriyeh Dalirakbari, Mohammad Khalili, Madjid Soltani, Saeid Sadeghieh Ahari
BACKGROUND: Cerebral vascular thrombosis (CVT) is the thrombosis of intracranial and sinuses. The aim of this is to estimate of risk of low folic acid, low vitamin B12, and hyperhomocysteinemia (hyper-Hcys) for CVT. MATERIALS AND METHODS: A total of 24 patients with CVT and 36 healthy controls participated in a cross-sectional case-control study. The deficient levels of folic acid and vitamin B12 defined as <10(th) percentile of folic acid and vitamin B12 level and hyper-Hcys was defined as >90(th) percentile of homocysteine of control group...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27901035/homocysteine-reducing-b-vitamins-and-ischemic-heart-disease-a-separate-sample-mendelian-randomization-analysis
#5
J V Zhao, C M Schooling
BACKGROUND/OBJECTIVES: Observationally, homocysteine is positively associated with ischemic heart disease (IHD) and unhealthy lipids; folate and vitamin B12, which reduce homocysteine, are associated with lower IHD risk and healthy lipids. Randomized controlled trials have shown no benefits of folate and vitamin B12 for IHD. To clarify the role of these potential targets of intervention in IHD we assessed how genetically determined homocysteine, folate and vitamin-B12-affected IHD and lipids...
November 30, 2016: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27898731/reproducibility-and-validity-of-a-food-frequency-questionnaire-designed-to-assess-diet-in-children-aged-4-5-years
#6
Jesus Vioque, Daniel Gimenez-Monzo, Eva Maria Navarrete-Muñoz, Manuela Garcia-de-la-Hera, Sandra Gonzalez-Palacios, Marisa Rebagliato, Ferran Ballester, Mario Murcia, Carmen Iñiguez, Fernando Granado
BACKGROUND: The food frequency questionnaire (FFQ) is the most efficient and cost-effective method to investigate the relationship between usual diet and disease in epidemiologic studies. Although FFQs have been validated in many adult populations worldwide, the number of valid FFQ in preschool children is very scarce. The aim of this study was to evaluate the reproducibility and validity of a semi-quantitative FFQ designed for children aged 4 to 5 years. MATERIALS AND METHODS: In this study, we have included 169 children aged 4-5 years from the INMA project in Valencia, a population-based prospective cohort study of mothers and children in Spain...
2016: PloS One
https://www.readbyqxmd.com/read/27898216/characterization-of-prostacyclin-associated-leg-pain-in-patients-with-pulmonary-arterial-hypertension
#7
Gabriel L Pagani-Estévez, Keith M Swetz, Michael D McGoon, Robert P Frantz, Susan K Tointon, Ann M Karnyski, Louise A Durst, James C Watson
RATIONALE: Prostacyclin-associated leg pain is a potentially debilitating adverse effect of prostacyclin therapy for patients with pulmonary arterial hypertension (PAH). However, to our knowledge, this entity has not been systematically studied. OBJECTIVE: To characterize the clinical features and metabolic risk factors for prostacyclinassociated leg pain. METHODS: At one academic medical center we assembled and analyzed a case series of patients with PAH and prostacyclin-associated leg pain...
November 29, 2016: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/27898035/dietary-b-vitamins-and-a-10-year-risk-of-dementia-in-older-persons
#8
Sophie Lefèvre-Arbogast, Catherine Féart, Jean-François Dartigues, Catherine Helmer, Luc Letenneur, Cécilia Samieri
B vitamins may lower the risk of dementia, yet epidemiological findings, mostly from countries with folic acid fortification, have remained inconsistent. We evaluated in a large French cohort of older persons the associations between dietary B vitamins and long-term incident dementia. We included 1321 participants from the Three-City Study who completed a 24 h dietary recall, were free of dementia at the time of diet assessment, and were followed for an average of 7.4 years. In Cox proportional hazards models adjusted for multiple potential confounders, including overall diet quality, higher intake of folate was inversely associated with the risk of dementia (p for trend = 0...
November 26, 2016: Nutrients
https://www.readbyqxmd.com/read/27895843/severe-anemia-in-malawian-children
#9
Job Cj Calis, Kamija S Phiri, E Brian Faragher, Bernard J Brabin, Imelda Bates, Luis E Cuevas, Rob J de Haan, Ajib I Phiri, Pelani Malange, Mirriam Khoka, Paul Jm Hulshof, Lisette van Lieshout, Marcel Ghm Beld, Yik Y Teo, Kirk A Rockett, Anna Richardson, Dominic P Kwiatkowski, Malcolm E Molyneux, Michaël Boele van Hensbroek
BACKGROUND: Severe anemia is a major cause of sickness and death in African children, yet the causes of anemia in this population have been inadequately studied. METHODS: We conducted a case-control study of 381 preschool children with severe anemia (hemoglobin concentration, <5.0 g per deciliter) and 757 preschool children without severe anemia in urban and rural settings in Malawi. Causal factors previously associated with severe anemia were studied. The data were examined by multivariate analysis and structural equation modeling...
September 2016: Malawi Medical Journal: the Journal of Medical Association of Malawi
https://www.readbyqxmd.com/read/27890954/prevalence-of-vitamin-b12-and-folic-acid-deficiency-in-hiv-positive-patients-and-its-association-with-neuropsychiatric-symptoms-and-immunological-response
#10
Prabha M R Adhikari, Mukta N Chowta, John T Ramapuram, Satish Rao, Karthik Udupa, Sahana Devdas Acharya
BACKGROUND: Deficiency of micronutrients is prevalent even before the development of symptoms of HIV disease and is associated with accelerated HIV disease progression. AIMS: This study evaluates the prevalence of folate and Vitamin B12 deficiency in HIV-positive patients with or without tuberculosis (TB) and its association with neuropsychiatric symptoms and immunological response. SETTINGS AND DESIGN: Cross-sectional, observational study in an outpatient setting...
July 2016: Indian Journal of Sexually Transmitted Diseases
https://www.readbyqxmd.com/read/27889885/investigating-factors-involved-in-post-laparoscopic-sleeve-gastrectomy-lsg-neuropathy
#11
Almaha Alsabah, Salman Al Sabah, Suleiman Al-Sabah, Ahmad Al-Serri, Eliana Al Haddad, Waleed M Renno
BACKGROUND: Laparoscopic sleeve gastrectomy (LSG) has gained popularity as the leading bariatric procedure for the treatment of morbid obesity. Due to the rising numbers of bariatric surgeries, neurologic complications have become increasingly recognized. Our aim was to examine biochemical and hormonal factors that are associated with neuropathy post-LSG. METHODS: Thirty-two patients were included: 16 patients with neuropathy in the neuropathic group (NG) and 16 patients without neuropathy in the control group (CG)...
November 26, 2016: Obesity Surgery
https://www.readbyqxmd.com/read/27886078/effects-of-two-year-vitamin-b12-and-folic-acid-supplementation-on-depressive-symptoms-and-quality-of-life-in-older-adults-with-elevated-homocysteine-concentrations-additional-results-from-the-b-proof-study-an-rct
#12
Elisa J de Koning, Nikita L van der Zwaluw, Janneke P van Wijngaarden, Evelien Sohl, Elske M Brouwer-Brolsma, Harm W J van Marwijk, Anke W Enneman, Karin M A Swart, Suzanne C van Dijk, Annelies C Ham, Nathalie van der Velde, André G Uitterlinden, Brenda W J H Penninx, Petra J M Elders, Paul Lips, Rosalie A M Dhonukshe-Rutten, Natasja M van Schoor, Lisette C P G M de Groot
Lowering elevated plasma homocysteine (Hcy) concentrations by supplementing vitamin B12 and folic acid may reduce depressive symptoms and improve health-related quality of life (HR-QoL) in older adults. This study aimed to test this hypothesis in a randomized controlled trial. Participants (N = 2919, ≥65 years, Hcy concentrations ≥12 µmol/L) received either 500 µg vitamin B12 and 400 µg folic acid daily or placebo for two years. Both tablets contained 15 µg vitamin D₃. Depressive symptoms were measured with the Geriatric Depression Scale-15 (GDS-15)...
November 23, 2016: Nutrients
https://www.readbyqxmd.com/read/27885843/current-evaluation-and-management-of-anaemia-in-patients-with-inflammatory-bowel-disease
#13
Julia Martin, Heinfried H Radeke, Axel Dignass, Jürgen Stein
Anaemia is a common extraintestinal manifestation in IBD patients and considerably impacts disease prognosis, hospitalisation rates and time lost from work. While iron deficiency anaemia is predominant, combinations of haematimetric and biochemical markers enable detection and targeted therapy of other aetiologies including vitamin B12/folic acid deficiencies, haemolysis, myelosuppression and pharmacotherapies. Areas covered: Current literature was searched for articles focusing on aetiology, diagnostics and therapy of anaemia in IBD...
November 25, 2016: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27885335/rapid-synthesis-of-redox-active-dodecaborane-b12-or-12-clusters-under-ambient-conditions
#14
Alex I Wixtrom, Yanwu Shao, Dahee Jung, Charles W Machan, Shaunt N Kevork, Elaine A Qian, Jonathan C Axtell, Saeed I Khan, Clifford P Kubiak, Alexander M Spokoyny
We have developed a fast and efficient route to obtain perfunctionalized ether-linked alkyl and benzyl derivatives of the closo-[B12(OH)12](2-) icosahedral dodecaborate cluster via microwave-assisted synthesis. These icosahedral boron clusters exhibit three-dimensional delocalization of the cage-bonding electrons, tunable photophysical properties, and a high degree of stability in air in both solid and solution states. A series of closo-[B12(OR)12](2-), hypocloso-[B12(OR)12](1-) and hypercloso-[B12(OR)12](0) clusters have been prepared with reaction times ranging from hours to several minutes...
May 1, 2016: Inorganic Chemistry Frontiers
https://www.readbyqxmd.com/read/27882183/psychiatric-symptoms-and-limb-tremors-associated-with-central-pontine-myelinolysis-a-case-of-alcoholism-without-hyponatremia
#15
Xue-Min Feng, Teng Zhao, Chun-Kui Zhou, Jing-Yao Liu
Central pontine myelinolysis (CPM), also known as osmotic demyelination syndrome, is a rare demyelinating disorder characterized by the loss of myelin in the center of the basis pontis. In this case report, an alcoholic patient with CPM and acquired demyelinating lesion of the basis pontis is described. The patient is a 70 year-old woman who presented with intermittent psychiatric symptoms and limb tremors following two months of alcohol abuse. During admission, magnetic resonance imaging (MRI) revealed hyperintensity on T2 weighted images and fluid-attenuated inversion-recovery imaging in the central pons without contrast enhancement...
November 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/27881965/fundamental-role-of-methylenetetrahydrofolate-reductase-677-c%C3%A2-%C3%A2-%C3%A2-t-genotype-and-flavin-compounds-in-biochemical-phenotypes-for-schizophrenia-and-schizoaffective-psychosis
#16
Stephanie Fryar-Williams
The Mental Health Biomarker Project (2010-2016) explored variables for psychosis in schizophrenia and schizoaffective disorder. Blood samples from 67, highly characterized symptomatic cases and 67 gender and age matched control participants were analyzed for methyl tetrahydrofolate reductase (MTHFR) 677C → T gene variants and for vitamin B6, B12 and D, folate, unbound copper, zinc cofactors for enzymes in the methylation cycle, and related catecholamine pathways. Urine samples were analyzed for indole-catecholamines, their metabolites, and oxidative-stress marker, hydroxylpyrolline-2-one (HPL)...
2016: Frontiers in Psychiatry
https://www.readbyqxmd.com/read/27876835/folic-acid-supplementation-improves-cognitive-function-by-reducing-the-levels-of-peripheral-inflammatory-cytokines-in-elderly-chinese-subjects-with-mci
#17
Fei Ma, Tianfeng Wu, Jiangang Zhao, Aili Song, Huan Liu, Weili Xu, Guowei Huang
This study aimed to evaluate whether folic acid supplementation would improve cognitive performance by reducing serum inflammatory cytokine concentrations. This RCT was performed in Tianjin, China. Participants with mild cognitive impairment (MCI) were randomly assigned to the folic acid (400 μg/day) or conventional treatment groups. Neuropsychological tests were administered, and folate, homocysteine, vitamin B12, IL-6, TNF-α, Aβ-42, and Aβ-40 were measured at baseline and at 6- and 12-month time points...
November 23, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27876556/homocysteine-and-disease-causal-associations-or-epiphenomenons
#18
REVIEW
Luciana Hannibal, Henk J Blom
Nutritional and genetic deficiencies of folate and vitamin B12 lead to elevation of cellular homocysteine (Hcy), which translates in increased plasma Hcy. The sources and role of elevated plasma Hcy in pathology continues to be a subject of intense scientific debate. Whether a cause, mediator or marker, little is known about the molecular mechanisms and interactions of Hcy with cellular processes that lead to disease. The use of folic acid reduces the incidence of neural tube defects, but the effect of Hcy-lowering interventions with folic acid in cardiovascular disease and cognitive impairment remains controversial...
November 19, 2016: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/27876555/one-carbon-metabolism-and-epigenetics
#19
REVIEW
Simonetta Friso, Silvia Udali, Domenica De Santis, Sang-Woon Choi
The function of one-carbon metabolism is that of regulating the provision of methyl groups for biological methylation reactions including that of DNA and histone proteins. Methylation at specific sites into the DNA sequence and at histone tails are among the major epigenetic feature of mammalian genome for the regulation of gene expression. The enzymes within one-carbon metabolism are dependent from a number of vitamins or nutrients that serve either as co-factors or methyl acceptors or donors among which folate, vitamin B12, vitamin B6, betaine, choline and methionine have a major role...
November 19, 2016: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/27876554/interaction-between-excess-folate-and-low-vitamin-b12-status
#20
REVIEW
Ligi Paul, Jacob Selhub
Current epidemiological evidence suggests that an imbalance of high folate status and low vitamin B12 status is associated with negative health outcomes in older adults and children. Such an imbalance during pregnancy also predisposes women to diabetes and their offspring to insulin resistance and adiposity and low birthweight. In older adults, vitamin B12 status can remain low despite adequate intake due to age-related decline in vitamin B12 absorption. Pregnant women are exposed to folic acid at varying doses depending on the prenatal care prescribed in different countries...
November 19, 2016: Molecular Aspects of Medicine
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