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Vitamin B12 deficiency

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https://www.readbyqxmd.com/read/28641923/rhodobacteraceae-on-the-marine-brown-alga-fucus-spiralis-are-abundant-and-show-physiological-adaptation-to-an-epiphytic-lifestyle
#1
Marco Dogs, Bernd Wemheuer, Laura Wolter, Nils Bergen, Rolf Daniel, Meinhard Simon, Thorsten Brinkhoff
Macroalgae harbour specific microbial communities on their surface that have functions related to host health and defence. In this study, the bacterial biofilm of the marine brown alga Fucus spiralis was investigated using 16S rRNA gene amplicon-based analysis and isolation of bacteria. Rhodobacteraceae (Alphaproteobacteria) were the predominant family constituting 23% of the epibacterial community. At the genus level, Sulfitobacter, Loktanella, Octadecabacter and a previously undescribed cluster were most abundant, and together they comprised 89% of the Rhodobacteraceae...
June 15, 2017: Systematic and Applied Microbiology
https://www.readbyqxmd.com/read/28635642/lack-of-association-between-serum-vitamin-b%C3%A2-vitamin-b12-and-vitamin-d-levels-with-different-types-of-glaucoma-a-systematic-review-and-meta-analysis
#2
Shengjie Li, Danhui Li, Mingxi Shao, Wenjun Cao, Xinghuai Sun
Although vitamins play a major role in health, and their deficiency may be linked to symptoms of optic-nerve dysfunction, the association between serum vitamin levels and glaucoma in humans remains controversial. In this study, articles in the PubMed, Web of Science, and EMBASE databases were searched up to 25March 2017. Nine studies on primary open-angle glaucoma (POAG), four studies on normal tension glaucoma (NTG), and six studies on exfoliative glaucoma (EXG) were retrieved. The combined results showed no differences in the levels of serum vitamin B₆ between POAG (p = 0...
June 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28620818/effects-of-atorvastatin-and-simvastatin-on-oxidative-stress-in-diet-induced-hyperhomocysteinemia-in-wistar-albino-rats-a-comparative-study
#3
T Nikolic, V Zivkovic, I Srejovic, I Stojic, N Jeremic, J Jeremic, K Radonjic, S Stankovic, R Obrenovic, D Djuric, V Jakovljevic
Considering the well-known antioxidant properties of statins, it seems important to assess their impact on major markers of oxidative stress (superoxide anion radical, nitric oxide, and index of lipid peroxidation) to compare the antioxidative potentials of atorvastatin and simvastatin during the different degrees of hyperhomocysteinemia (HHcy) in rats. This study was conducted on adult male Wistar albino rats (n = 90; 4 weeks old; 100 ± 15 g body mass) in which HHcy was achieved by dietary manipulation...
June 15, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28618704/re-vitamin-b12-deficiency-in-patients-after-enterocystoplasty
#4
Douglas A Canning
No abstract text is available yet for this article.
July 2017: Journal of Urology
https://www.readbyqxmd.com/read/28616085/helicobacter-pylori-infection-old-and-new
#5
REVIEW
S Diaconu, A Predescu, A Moldoveanu, C S Pop, C Fierbințeanu-Braticevici
Helicobacter pylori is a spiral-shaped bacterium that grows in the digestive tract and may be present in more than half of the world's population. The clinical features of Helicobacter pylori range from asymptomatic gastritis to gastrointestinal malignancy. Mucosa-associated lymphoid tissue (MALT) lymphoma is a low-grade B-cell marginal zone lymphoma and Helicobacter pylori has been detected in more than 75% of the patients with MALT lymphoma. Many tests for the detection of Helicobacter pylori are available, including antibody tests, urea breath tests, stool antigen tests and endoscopic biopsies...
April 2017: Journal of Medicine and Life
https://www.readbyqxmd.com/read/28611659/vitamin-d-homocysteine-and-folate-in-subcortical-vascular-dementia-and-alzheimer-dementia
#6
Rita Moretti, Paola Caruso, Matteo Dal Ben, Corrado Conti, Silvia Gazzin, Claudio Tiribelli
Dementia is a worldwide health problem which affects millions of patients; Alzheimer's disease (AD) and subcortical vascular dementia (sVAD) are the two most frequent forms of its presentation. As no definite therapeutic options have been discovered, different risk factors for cognitive impairment have been searched for potential therapies. This report focuses on the possible evidence that vitamin D deficiency and hyper-homocysteinemia can be considered as two important factors for the development or the progression of neurodegenerative or vascular pathologies...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28598562/genetic-polymorphisms-and-folate-status
#7
REVIEW
Mami Hiraoka, Yasuo Kagawa
Moderate hyperhomocysteinemia-induced low folate status is an independent risk factor for cardiovascular disease, dementia, and depression. Folate is an essential cofactor in the one-carbon metabolism pathway and is necessary in amino acid metabolism, purine and thymidylate synthesis, and DNA methylation. In the folate cycle and homocysteine metabolism, folate, vitamin B12, vitamin B6, and vitamin B2 are important cofactors. Many enzymes are involved in folate transport and uptake, the folate pathway, and homocysteine (Hcy) metabolism, and various polymorphisms have been documented in these enzymes...
June 9, 2017: Congenital Anomalies
https://www.readbyqxmd.com/read/28585624/exploiting-the-biomimetic-and-luminescence-properties-of-multivalent-dendrimer-semiconductor-nanohybrid-materials-in-the-ultra-low-level-determination-of-folic-acid
#8
Somashree Kundu, Susmita Maiti, Tushar Kanti Das, Debasmita Ghosh, Chandra Nath Roy, Abhijit Saha
In view of the enhanced generation of folate receptors in cancerous cells and diseases linked to the deficiency of folic acid, such as anemia, mental devolution, congenital malformation, etc., the development of a simple method for the ultra-sensitive determination of folic acid remains a long-standing issue for practical applications in medicine and biotechnology. Thus, the proposed luminescence based strategy involving multifunctional poly(amidoamine) (PAMAM) dendrimer encapsulated quantum dots (QDs) as a probe provides a simple, fast and efficient method for the selective determination of folic acid at the nano-molar level...
June 6, 2017: Analyst
https://www.readbyqxmd.com/read/28584374/demographic-characteristics-and-association-of-serum-vitamin-b12-ferritin-and-thyroid-function-with-premature-canities-in-indian-patients-from-an-urban-skin-clinic-of-north-india-a-retrospective-analysis-of-71-cases
#9
Sidharth Sonthalia, Adity Priya, Desmond J Tobin
BACKGROUND: The incidence of self-reported premature hair graying (PHG) seems to be on the rise. PHG has a profound impact on the patient's quality of life. It remains an incompletely understood etiology with limited and modest treatment options. AIM: The evaluation of the demographic and clinical profile of patients with premature canities, and exploration of the association of this entity with certain systemic disorders suspected to be related to its etiology...
May 2017: Indian Journal of Dermatology
https://www.readbyqxmd.com/read/28572511/clinical-or-atpase-domain-mutations-in-abcd4-disrupt-the-interaction-between-the-vitamin-b12-trafficking-proteins-abcd4-and-lmbd1
#10
Victoria Fettelschoss, Patricie Burda, Corinne Sagné, David Coelho, Corinne De Laet, Seraina Lutz, Terttu Suormala, Brian Fowler, Nicolas Pietrancosta, Bruno Gasnier, Beat Bornhauser, D Sean Froese, Matthias R Baumgartner
Vitamin B12 (cobalamin, Cbl), in the cofactor forms methyl-Cbl and adenosyl-Cbl, is required for the function of the essential enzymes methionine synthase and methylmalonyl-CoA mutase, respectively. Cbl enters mammalian cells by receptor-mediated endocytosis of protein-bound Cbl followed by lysosomal export of free Cbl to the cytosol, and further processing to these cofactor forms. The integral membrane proteins LMBD1 and ABCD4 are required for lysosomal release of Cbl, and mutations in the genes LMBRD1 and ABCD4 result in the cobalamin metabolism disorders cblF and cblJ...
June 1, 2017: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/28571565/c-reactive-protein-is-differentially-modulated-by-co-existing-infections-vitamin-deficiencies-and-maternal-factors-in-pregnant-and-lactating-indigenous-panamanian-women
#11
Doris González-Fernández, Emérita Del Carmen Pons, Delfina Rueda, Odalis Teresa Sinisterra, Enrique Murillo, Marilyn E Scott, Kristine G Koski
BACKGROUND: The usefulness of C-reactive protein (CRP) as a non-specific marker of inflammation during pregnancy and lactation is unclear in impoverished populations where co-existing infections and vitamin deficiencies are common. METHODS: This cross-sectional study in Panama recruited 120 pregnant and 99 lactating Ngäbe-Buglé women from 14 communities in rural Panama. Obstetric history, indoor wood smoke exposure, fieldwork, BMI, vitamins A, B12, D, and folic acid, and inflammation markers (CRP, neutrophil/lymphocyte ratio (NLR), plateletcrit and cytokines) were measured...
June 2, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28570331/nutrients-and-neurology
#12
Neeraj Kumar
PURPOSE OF REVIEW: This article provides an update on the clinical presentation and management of neurologic disease related to key nutrient deficiencies. RECENT FINDINGS: Major advances have been made in understanding the pathway related to vitamin B12 absorption and distribution. It is now known that deficiencies of vitamin B12 and copper have similar neurologic manifestations. Bariatric surgery is a risk factor for both. Alcoholism is just one of the many causes of thiamine deficiency...
June 2017: Continuum: Lifelong Learning in Neurology
https://www.readbyqxmd.com/read/28566602/an-impaired-awareness-of-hypoglycemia-improved-after-vitamin-b12-treatment-in-a-type-1-diabetic-patient
#13
Shingo Fujita, Junji Kozawa, Chisaki Ishibashi, Takekazu Kimura, Tetsuhiro Kitamura, Kenji Fukui, Tetsuyuki Yasuda, Hiromi Iwahashi, Akihisa Imagawa, Iichiro Shimomura
An impaired awareness of hypoglycemia is a serious problem in diabetic patients, which can lead to life-threatening severe hypoglycemia. Recurrent hypoglycemia attenuates the function of the central, mainly hypothalamic, nervous system and it causes an impaired awareness of hypoglycemia. Vitamin B12 deficiency is also associated with the dysfunction of central nervous system. We report a 72-year-old type 1 diabetic patient with vitamin B12 deficiency whose impaired awareness of hypoglycemia improved after 4 weeks of vitamin B12 administration with an increased counter-hormone secretion in response to hypoglycemia...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28565892/metabolic-surgery-and-nutritional-deficiencies
#14
Christine Stroh, Thomas Manger, Frank Benedix
The increasing prevalence of morbid obesity in Germany is associated with an increasing number of metabolic surgical interventions. Short-term surgical and long-term metabolic complications such as nutrient deficiencies can be considered as the main risks of metabolic surgery with its malabsorptive but also restrictive procedures. The aim of this review is to characterize the most relevant metabolic complications specific for the various bariatric procedures, which, subsequently, require a permanent surveillance and supplementation, respectively...
May 30, 2017: Minerva Chirurgica
https://www.readbyqxmd.com/read/28553599/serum-vitamin-b12-levels-in-type-2-diabetes-patients-on-metformin-compared-to-those-never-on-metformin-a-cross-sectional-study
#15
Nishant Raizada, Viveka P Jyotsna, Vishnubhatla Sreenivas, Nikhil Tandon
CONTEXT: There are limited data about the effect of metformin use on serum Vitamin B12 levels in type 2 diabetes patients from India. AIMS: We studied serum Vitamin B12 levels in patients with type 2 diabetes mellitus who were receiving metformin and compared them to those never treated with metformin. SUBJECTS AND METHODS: A total of 183 patients ("metformin" group 121, "no metformin" group 63) of type 2 diabetes from the endocrinology clinic of a tertiary care center in North India were studied...
May 2017: Indian Journal of Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28549839/vitamin-b12-deficiency-might-be-related-to-sarcopenia-in-older-adults
#16
Esra Ates Bulut, Pinar Soysal, Ali Ekrem Aydin, Ozge Dokuzlar, Suleyman Emre Kocyigit, Ahmet Turan Isik
Sarcopenia and dynapenia are related to repeated falls, mobility restriction, depression, frailty, increased mortality and morbidity. The aim of this study is to evaluate the relationship between vitamin B12 deficiency and sarcopenia in older adults. 403 patients, who attended to outpatient clinic and underwent comprehensive geriatric assessment, were included study. All cases' skeletal muscle mass (SMM), walking speed and hand grip strength were recorded by bioimpedance, 4meter walking test and hand dynamometer respectively...
September 2017: Experimental Gerontology
https://www.readbyqxmd.com/read/28545069/behavioral-alterations-are-associated-with-vitamin-b12-deficiency-in-the-transcobalamin-receptor-cd320-ko-mouse
#17
Kaveri Arora, Jeffrey M Sequeira, Alejandro I Hernández, Juan M Alarcon, Edward V Quadros
Vitamin B12 (cobalamin) deficiency is prevalent worldwide and causes megaloblastic anemia and neurologic deficits. While the anemia can be treated, the neurologic deficits can become refractive to treatment as the disease progresses. Therefore, timely intervention is critical for a favorable outcome. Moreover, the metabolic basis for the neuro-pathologic changes and the role of cobalamin deficiency in the pathology still remains unexplained. Using a transcobalamin receptor / CD320 knockout mouse that lacks the receptor for cellular uptake of transcobalamin bound cobalamin, we aimed to determine whether cobalamin deficiency in the central nervous system produced functional neurologic deficits in the mouse that would parallel those observed in humans...
2017: PloS One
https://www.readbyqxmd.com/read/28542653/-folate-and-pregnancy-current-concepts-it-is-required-folic-acid-supplementation
#18
Erika Castaño, Raúl Piñuñuri, Sandra Hirsch, Ana María Ronco
Folate intake during pregnancy is essential for an adequate fetal and placental development and for the long time health of the individual. Its deficiency may induce fetal pathologies, including neural tube disease (NTD). Therefore, several countries implemented public policies to fortify foods with folic acid (FA). Chile started the fortification of wheat flour with FA in the year 2000, decreasing a 43% the prevalence of NTD. However, despite the high consumption of bread (the main fortified food with FA) by our population, a high number of pregnant women consume FA supplements, thus, over passing the maximal recommended FA intake...
April 2017: Revista Chilena de Pediatría
https://www.readbyqxmd.com/read/28538514/long-term-outcome-of-4-patients-with-transcobalamin-deficiency-caused-by-2-novel-tcn2-mutations
#19
Marwan Nashabat, Gustavo Maegawa, Peter H Nissen, Ebba Nexo, Hussain Al-Shamrani, Mohammed Al-Owain, Majid Alfadhel
Cobalamin (vitamin B12 [Cbl]) is an essential cofactor for many biochemical pathways. Transcobalamin (TC) is required to internalize Cbl into the cells through membrane receptor-mediated endocytosis. Cbl is then processed in the cytoplasm and mitochondria by complementation factors leading to its active metabolites; methylcobalamin and 5-deoxyadenosyl-cobalamin. Deficiency of TC results in an elevation in methylmalonic acid and homocysteine. Patients usually present with macrocytic anemia, pancytopenia, failure to thrive, gastrointestinal symptoms, and neurological dysfunction...
May 22, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/28537576/an-infant-and-mother-with-severe-b12-deficiency-vitamin-b12-status-assessment-should-be-determined-in-pregnant-women-with-anaemia
#20
A Sobczyńska-Malefora, R Ramachandran, D Cregeen, E Green, P Bennett, D J Harrington, H A Lemonde
The vitamin B12 status of infants depends on maternal B12 status during pregnancy, and during lactation if breastfed. We present a 9-month-old girl who was admitted to the metabolic unit for assessment of developmental delay. She was exclusively breastfed and the introduction of solids at 5 months was unsuccessful. Investigations revealed pancytopenia, undetectable B12 and highly elevated methylmalonic acid and homocysteine. Methylmalonic acid and homocysteine normalised following B12 injections. Marked catch-up of developmental milestones was noted after treatment with B12...
May 24, 2017: European Journal of Clinical Nutrition
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