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https://www.readbyqxmd.com/read/28818841/distinct-intestinal-adaptation-for-vitamin-b12-and-bile-acid-absorption-revealed-in-a-new-mouse-model-of-massive-ileocecal-resection
#1
Yuka Matsumoto, Wakana Mochizuki, Shintaro Akiyama, Taichi Matsumoto, Kengo Nozaki, Mamoru Watanabe, Tetsuya Nakamura
Ileocecal resection (ICR), one of several types of intestinal resection that results in short bowel syndrome (SBS), causes severe clinical disease in humans. We here describe a mouse model of massive ICR in which 75% of the distal small intestine is removed. We demonstrate that mice underwent 75% ICR show severe clinical signs and high mortality, which may recapitulate severe forms of human SBS, despite an adaptive response throughout the remnant intestine. By using this model, we also investigated whether the epithelium of the remnant intestine shows enhanced expression of factors involved in region-specific functions of the ileum...
August 17, 2017: Biology Open
https://www.readbyqxmd.com/read/28816346/homocysteine-lowering-interventions-for-preventing-cardiovascular-events
#2
REVIEW
Arturo J Martí-Carvajal, Ivan Solà, Dimitrios Lathyris, Mark Dayer
BACKGROUND: Cardiovascular disease, which includes coronary artery disease, stroke and peripheral vascular disease, is a leading cause of death worldwide. Homocysteine is an amino acid with biological functions in methionine metabolism. A postulated risk factor for cardiovascular disease is an elevated circulating total homocysteine level. The impact of homocysteine-lowering interventions, given to patients in the form of vitamins B6, B9 or B12 supplements, on cardiovascular events has been investigated...
August 17, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28816120/b-vitamins-in-stroke-prevention-time-to-reconsider
#3
REVIEW
J David Spence, Qilong Yi, Graeme J Hankey
B vitamin therapy lowers plasma total homocysteine concentrations, and might be a beneficial intervention for stroke prevention; however, cyanocobalamin (a form of vitamin B12) can accelerate decline in renal function and increase the risk of cardiovascular events in patients with impaired renal function. Although early trials did not show benefit in reduction of stroke, these results might have been due to harm in participants with impaired renal function. In patients with diabetic nephropathy, cyanocobalamin is harmful, whereas B vitamins appear to reduce cardiovascular events in study participants with normal renal function...
September 2017: Lancet Neurology
https://www.readbyqxmd.com/read/28792705/homocysteine-metabolism-and-hematological-parameters-in-early-stage-of-phenytoin-treated-epileptic-children
#4
Tarun K Sharma, S K Vardey, S Sitaraman
BACKGROUND: Long-term antiepileptic drug (AED) therapy has been associated with metabolic consequences that lead to an increase in risk of atherosclerosis in patients with epilepsy. Earlier published studies showed conflicting results about the levels of hematological parameters, serum homocysteine, folate, and vitamin B12, in epileptics treated with phenytoin monotherapy. Therefore, we evaluated homocysteine metabolism and hematological parameters in early stage of phenytoin treated epileptic children...
July 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28789684/blood-lead-cadmium-and-mercury-in-relation-to-homocysteine-and-c-reactive-protein-in-women-of-reproductive-age-a-panel-study
#5
Anna Z Pollack, Sunni L Mumford, Lindsey Sjaarda, Neil J Perkins, Farah Malik, Jean Wactawski-Wende, Enrique F Schisterman
BACKGROUND: To examine the relationship between cadmium, lead, and mercury concentrations with high-sensitivity C-reactive protein (hs-CRP) and homocysteine in women. METHODS: Metals were measured at enrollment in whole blood. Homocysteine and hs-CRP were measured in one (N = 9) or two (N = 250) menstrual cycles up to 3 and 8 times per cycle, respectively. Linear mixed models with inverse probability of exposure weights to account for time varying confounding were used and models were stratified by dietary and serum vitamin status (dietary: vitamin B6, B12, folate; serum: folate)...
August 8, 2017: Environmental Health: a Global Access Science Source
https://www.readbyqxmd.com/read/28780990/folate-and-vitamin-b12-status-is-associated-with-insulin-resistance-and-metabolic-syndrome-in-morbid-obesity
#6
Zhen Li, Rosa-Maria Gueant-Rodriguez, Didier Quilliot, Marie-Aude Sirveaux, David Meyre, Jean-Louis Gueant, Laurent Brunaud
BACKGROUND: Low vitamin B12 and high folate during pregnancy are associated with visceral obesity and insulin resistance in offspring. In the general population, high folate exacerbates the increase of methylmalonic acid, a marker of vitamin B12 deficiency. However, the influence of vitamin B12 and folate and their related markers on insulin resistance and metabolic syndrome remains unknown in severe obesity. AIM: To evaluate the influence of vitamin B12 and folate on HOMA-IR and components of metabolic syndrome in severe obesity...
July 24, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28779878/adult-classical-homocystinuria-requiring-parenteral-nutrition-pitfalls-and-management
#7
REVIEW
Christel Tran, Luisa Bonafé, Jean-Marc Nuoffer, Julie Rieger, Mette M Berger
BACKGROUND: Homocystinuria due to cystathionine beta synthase (CBS) deficiency presents with a wide clinical spectrum. Treatment by the enteral route aims at reducing homocysteine levels by using vitamin B6, possibly methionine-restricted diet, betaine and/or folate and vitamin B12 supplementation. Currently no nutritional guidelines exist regarding parenteral nutrition (PN) under acute conditions. METHODS: Exhaustive literature search was performed, in order to identify the relevant studies describing the pathogenesis and nutritional intervention of adult classical homocystinuria requiring PN...
July 25, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28765779/effects-of-folic-acid-supplementation-on-serum-homocysteine-levels-lipid-profiles-and-vascular-parameters-in-post-menopausal-korean-women-with-type-2-diabetes-mellitus
#8
Aswathy Vijayakumar, Eun-Kyung Kim, Hyesook Kim, Young Ju Choi, Kap Bum Huh, Namsoo Chang
BACKGROUND/OBJECTIVES: Complications of diabetes, such as cardiovascular disease, are associated with increased mortality among type 2 diabetes mellitus patients. Homocysteine has been recently identified as a predictor of cardiovascular disease-related complications in diabetes. We investigated whether or not supplementation with folic acid tablets can lower homocysteine levels and improve parameters related with vascular complications. SUBJECTS/METHODS: We conducted a non-randomized 8-week trial involving postmenopausal diabetic women (n = 25) supplemented with 800 µg of folic acid (400 µg twice a day) daily...
August 2017: Nutrition Research and Practice
https://www.readbyqxmd.com/read/28757000/characteristics-of-vitamin-b12-deficiency-in-patients-with-plasma-cell-disorders
#9
Caitlyn Braschi, John Doucette, Ajai Chari
BACKGROUND: Although increased rates of vitamin B12 deficiency have been reported in patients with plasma cell dyscrasias (PCDs), no mechanism has been identified. Excess free light chains (FLCs) could disrupt the renal proximal tubule receptors where B12 is reabsorbed. We sought to characterize the relationship between B12 deficiency and PCDs. We hypothesized that rates of B12 deficiency would be highest in patients with PCDs with high FLC burdens. METHODS: We reviewed the electronic medical records of 501 patients who met inclusion criteria (diagnosed PCD with documented serum B12 and FLC levels) to obtain clinical data recorded prior to patients' lowest B12 levels...
July 12, 2017: Clinical Lymphoma, Myeloma & Leukemia
https://www.readbyqxmd.com/read/28754404/relevance-of-plasma-levels-of-free-homocysteine-and-methionine-as-risk-predictors-for-ischemic-stroke-in-the-young
#10
Kondapura Jayadevappa Rudreshkumar, Vijaya Majumdar, Dindagur Nagaraja, Rita Christopher
BACKGROUND & AIMS: The debated vascular risk potential of total homocysteine (tHcy), due to failed clinical trials designed on B vitamin supplementation, raises many possible explanations like the higher risk potential of the deleterious, free form of homocysteine (fHcy) or, the unchecked confounding effects of B-vitamins in tHcy-based association studies. Additionally, the cardiovascular risk probability of altered status of the homocysteine precursor, methionine (tMet) could shed light on the causality of association between tHcy and cardiovascular diseases...
July 13, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28754003/estimated-nutritive-value-of-low-price-model-lunch-sets-provided-to-garment-workers-in-cambodia
#11
Jan Makurat, Aarati Pillai, Frank T Wieringa, Chhoun Chamnan, Michael B Krawinkel
BACKGROUND: The establishment of staff canteens is expected to improve the nutritional situation of Cambodian garment workers. The objective of this study is to assess the nutritive value of low-price model lunch sets provided at a garment factory in Phnom Penh, Cambodia. METHODS: Exemplary lunch sets were served to female workers through a temporary canteen at a garment factory in Phnom Penh. Dish samples were collected repeatedly to examine mean serving sizes of individual ingredients...
July 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28749117/roux-en-y-gastric-bypass-versus-sleeve-gastrectomy-a-narrative-review-of-risks-and-benefits
#12
Matthew D Ettleson, Corey J Lager, Andrew T Kraftson, Nazanene H Esfandiari, Elif A Oral
INTRODUCTION: Roux-en-Y gastric bypass (GB) and sleeve gastrectomy (SG) are the most commonly performed metabolic surgeries and are highly effective for the treatment of obesity and related comorbidities. In this narrative review, recent studies of at least two years of follow-up directly comparing outcomes between GB and SG are reviewed to assess the efficacy of each procedure in weight loss and diabetes remission, as well as resulting quality of life (QoL) assessment and micronutrient deficiencies...
July 26, 2017: Minerva Chirurgica
https://www.readbyqxmd.com/read/28748002/high-levels-of-circulating-folate-concentrations-are-associated-with-dna-methylation-of-tumor-suppressor-and-repair-genes-p16-mlh1-and-mgmt-in-elderly-chileans
#13
Hugo Sanchez, Mohammad B Hossain, Lydia Lera, Sandra Hirsch, Cecilia Albala, Ricardo Uauy, Karin Broberg, Ana M Ronco
BACKGROUND: Changes in DNA methylation, one of the most studied epigenetic mechanisms, are considered an initial marker for early cancer detection. We evaluated how availability of dietary factors (folates and vitamin B12) involved in one-carbon metabolism may contribute to DNA methylation changes of cancer-related genes in human subjects. METHODS: We studied, by pyrosequencing, the methylation of tumor suppressor gene p16, DNA repair genes MLH1 and MGMT, and the repetitive element LINE-1 (as a surrogate for global DNA methylation), in blood of elderly individuals (n = 249) who had been exposed to folic acid (FA) through FA-fortified wheat flour during the last 12 years...
2017: Clinical Epigenetics
https://www.readbyqxmd.com/read/28731851/the-frequency-of-occurrence-of-fish-shaped-red-blood-cells-in-different-haematologic-disorders
#14
Christoph Robier, Carolin Körber, Franz Quehenberger, Manfred Neubauer, Albert Wölfler
BACKGROUND: Red blood cells (RBC) resembling the silhouette of a fish are rarely observed in peripheral blood (PB) smears. In this study, we determined the frequency of occurrence of fish-shaped RBC in different haematologic diseases. METHODS: We examined PB smears of patients with iron deficiency anaemia (IDA) (n=23), β-thalassaemia minor (BTM) (n=30), sickle cell disease (SCD) (n=7), autoimmune haemolytic anaemia (AIHA) (n=13), microangiopathic haemolytic anaemia (MAHA) (n=11), hereditary sphaerocytosis (HS) (n=4), hereditary elliptocytosis (HE) (n=3), vitamin B12 and folate deficiency (n=15), anaemia in liver disease (LD) (n=17), myelodysplastic syndrome (MDS) (n=15), acute myeloid leukaemia (AML) (n=29), chronic myeloid leukaemia (CML) (n=18), primary myelofibrosis (PMF) (n=12), chronic myelo-monocytic leukaemia (CMML) (n=15) and 21 healthy controls by light microscopy for the occurrence of fish-shaped erythrocytes...
July 21, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28718091/nutritional-and-micronutrient-care-of-bariatric-surgery-patients-current-evidence-update
#15
REVIEW
Michael A Via, Jeffrey I Mechanick
PURPOSE OF REVIEW: The continued success of bariatric surgery to treat obesity and obesity-associated metabolic conditions creates a need for a strong understanding of clinical nutrition both before and after these procedures. RECENT FINDINGS: Surgically induced alteration of gastrointestinal physiology can affect the nutrition of individuals, especially among those who have undergone malabsorptive procedures. While uncommon, a subset of patients may develop protein-calorie malnutrition...
July 17, 2017: Current Obesity Reports
https://www.readbyqxmd.com/read/28710276/atp-binding-and-hydrolysis-disrupts-the-high-affinity-interaction-between-the-heme-abc-transporter-hmuuv-and-its-cognate-substrate-binding-protein
#16
Hiba Qasem Abdullah, Michal Perach, Nurit Livnat-Levanon, Oded Lewinson
Using the energy of ATP hydrolysis ABC transporters catalyze the trans-membrane transport of molecules. In bacteria they partner with a high affinity substrate binding protein (SBP) to import essential micronutrients. ATP binding by Type-I ABC transporters (importers of amino acids, sugars, peptides, small ions) stabilizes the interaction between the transporter and the SBP, thus allowing transfer of the substrate from the latter to the former. In Type-II ABC transporters (importers of trace elements, e.g., vitamin B12, heme, iron-siderophores) the role of ATP remains debatable...
July 14, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28708674/chemotherapy-induced-peripheral-neuropathy-a-review-of-recent-findings
#17
Peggy Y Kim, Carrie E Johnson
PURPOSE OF REVIEW: Chemotherapy-induced peripheral neuropathy (CIPN) is a common, frequently chronic condition characterized by pain and decreased function. Given the growing number of cancer survivors and an increasing recognition of opioid therapy limitations, there is a need for critical analysis of the literature in directing an informed and thoughtful approach for the management of painful CIPN. RECENT FINDINGS: A PubMed search for 'chemotherapy-induced peripheral neuropathy AND pain' identifies 259 publications between 1 January 2016 and 31 March 2017...
July 13, 2017: Current Opinion in Anaesthesiology
https://www.readbyqxmd.com/read/28700571/open-and-closed-structures-reveal-allostery-and-pliability-in-the-hiv-1-envelope-spike
#18
Gabriel Ozorowski, Jesper Pallesen, Natalia de Val, Dmitry Lyumkis, Christopher A Cottrell, Jonathan L Torres, Jeffrey Copps, Robyn L Stanfield, Albert Cupo, Pavel Pugach, John P Moore, Ian A Wilson, Andrew B Ward
For many enveloped viruses, binding to a receptor(s) on a host cell acts as the first step in a series of events culminating in fusion with the host cell membrane and transfer of genetic material for replication. The envelope glycoprotein (Env) trimer on the surface of HIV is responsible for receptor binding and fusion. Although Env can tolerate a high degree of mutation in five variable regions (V1-V5), and also at N-linked glycosylation sites that contribute roughly half the mass of Env, the functional sites for recognition of receptor CD4 and co-receptor CXCR4/CCR5 are conserved and essential for viral fitness...
July 20, 2017: Nature
https://www.readbyqxmd.com/read/28698453/plasma-homocysteine-and-serum-folate-and-vitamin-b12-levels-in-mild-cognitive-impairment-and-alzheimer-s-disease-a-case-control-study
#19
Fei Ma, Tianfeng Wu, Jiangang Zhao, Lu Ji, Aili Song, Meilin Zhang, Guowei Huang
Homocysteine (Hcy) is a risk factor for brain atrophy, cognitive impairment, and dementia. Vitamin B12 and folate are cofactors necessary for the methylation of Hcy. However, there is some debate regarding the differing levels of plasma Hcy and serum folate and vitamin B12 among healthy controls, patients with mild cognitive impairment (MCI), and patients with Alzheimer's disease (AD). This study aimed to evaluate how the levels of plasma Hcy and its biological determinants, folate and vitamin B12, are related to MCI and AD in older Chinese adults...
July 8, 2017: Nutrients
https://www.readbyqxmd.com/read/28691407/oxidative-stress-hepcidin-and-nesfatin-i-status-in-childhood-iron-and-vitamin-b12-deficiency-anemias
#20
Tünay Kontaş Aşkar, Olga Büyükleblebici, Adnan Adil Hismioğulları, Zeynep Hünkerler
BACKGROUND: Anemia is a disease that is long and often repetitive and can result in great burden to the national economy. The most frequent nutritional deficiency anemias in children are related with iron and vitamin B12 deficiencies. OBJECTIVES: The aim of this study was to determine the oxidative stress, hepcidin, and nesfatin-I levels in childhood iron and vitamin B12 deficiency anemias. MATERIAL AND METHODS: The study had three groups of 15 children, iron anemia deficiency group, vitamin B12 deficiency group and a control group...
June 27, 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
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