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Vitamin B12 deficiency

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https://www.readbyqxmd.com/read/29218905/considerations-for-automated-machine-learning-in-clinical-metabolic-profiling-altered-homocysteine-plasma-concentration-associated-with-metformin-exposure
#1
Alena Orlenko, Jason H Moore, Patryk Orzechowski, Randal S Olson, Junmei Cairns, Pedro J Caraballo, Richard M Weinshilboum, Liewei Wang, Matthew K Breitenstein
With the maturation of metabolomics science and proliferation of biobanks, clinical metabolic profiling is an increasingly opportunistic frontier for advancing translational clinical research. Automated Machine Learning (AutoML) approaches provide exciting opportunity to guide feature selection in agnostic metabolic profiling endeavors, where potentially thousands of independent data points must be evaluated. In previous research, AutoML using high-dimensional data of varying types has been demonstrably robust, outperforming traditional approaches...
2018: Pacific Symposium on Biocomputing
https://www.readbyqxmd.com/read/29209773/effect-of-8-week-oral-supplementation-with-3-%C3%A2%C2%B5g-cyano-b12-or-hydroxo-b12-in-a-vitamin-b12-deficient-population
#2
Eva Greibe, Namita Mahalle, Vijayshri Bhide, Sergey Fedosov, Christian W Heegaard, Sadanand Naik, Ebba Nexo
PURPOSE: We compare the effect of 8-week oral supplementation with cyano-B12 (currently used in vitamin pills) and hydroxo-B12 (predominant form in the diet) in a population with nutritional vitamin B12 deficiency. METHODS: Fifty-one healthy Indian adults with baseline serum cobalamin < 200 pmol/L were supplied for 8 weeks with daily oral supplements of 3-µg cyano-B12 (n = 15), 3-µg hydroxo-B12 (n = 16), or a placebo (n = 20). Blood at baseline, and each following week, was examined for total cobalamin, holotranscobalamin, methylmalonic acid, and homocysteine...
December 5, 2017: European Journal of Nutrition
https://www.readbyqxmd.com/read/29204197/infantile-tremor-syndrome-in-modern-times
#3
Piyush Gautam, Nivedita Sharma, Sanjeev Chaudhary, Ankush Kaushal
Background: Infantile tremor syndrome (ITS) is a clinical syndrome of acute or gradual onset of mental and psychomotor changes, pigmentary disturbances of hair and skin, pallor, and tremors in malnourished children aged between 5 months and 3 years. It is a well-known entity, but the exact etiopathogenesis is still not known. Setting and Design: Prospective observational study carried out in the Department of Pediatrics at Dr RPGMC Tanda, Kangra in Himachal Pradesh...
July 2017: Journal of Pediatric Neurosciences
https://www.readbyqxmd.com/read/29197046/evaluation-of-nutritional-status-post-laparoscopic-sleeve-gastrectomy-5-year-outcomes
#4
Salman Al-Sabah, Aliaa Al-Mutawa, Alfred Kojo Anderson, Mohammad Al-Mutawa
INTRODUCTION: Obesity is considered a public health problem and has led to advancements in bariatric surgery. Laparoscopic sleeve gastrectomy (LSG) had become the most performed procedure worldwide; however, its consequences on nutritional status in the short and long term are of concern. METHODS: A retrospective analysis of medical records and bariatric database of patients who underwent LSG from October 2008-September 2015 at Al-Amiri Hospital, Kuwait, was performed...
December 1, 2017: Obesity Surgery
https://www.readbyqxmd.com/read/29192578/-nitrous-oxide-induced-polyneuropathy
#5
S H P Conjaerts, J E Bruijnes, K Beerhorst, R Beekman
Nitrous oxide, laughing gas, is used as a party drug to achieve a euphoric effect. It has been gaining popularity in recent years and is considered a relatively innocent substance. Nitrous oxide is known to cause subacute degeneration of the spinal cord by inactivation of active vitamin B12. Vitamin B12 plays an essential role in the synthesis of myelin. Hence, vitamin B12 deficiency can lead to degeneration of the dorsal and lateral columns of the spinal cord. Polyneuropathy is a less known complication. We present a 17-year-old woman and a 19-year-old man with subacute axonal polyneuropathy caused by laughing gas abuse...
2017: Nederlands Tijdschrift Voor Geneeskunde
https://www.readbyqxmd.com/read/29190137/high-risk-gastric-pathology-and-prevalent-autoimmune-diseases-in-patients-with-pernicious-anemia
#6
Jing W Hughes, Brian D Muegge, Garry S Tobin, Marina Litvin, Lulu Sun, Jose B Saenz, C Prakash Gyawali, Janet B McGill
OBJECTIVE: Pernicious anemia (PA) develops from atrophic gastritis due to autoimmune destruction of parietal cells and results in achlorhydria, vitamin B12 and iron deficiencies, anemia, neurologic deficits, and premalignant and malignant stomach lesions. We report the presentation, diagnosis and gastric complications of PA in patients from an endocrinology practice. METHODS: Thirty-four patients (31 female, 3 male) with PA who underwent esophagogastroduodenoscopy (EGD) or gastrectomy were identified...
November 2017: Endocrine Practice
https://www.readbyqxmd.com/read/29189512/the-efficacy-of-oral-vitamin-b12-replacement-for-nutritional-vitamin-b12-deficiency
#7
Rabia G Sezer, Abdulkadir Bozaykut, Handan A Akoğlu, Gül N Özdemir
Standard treatment of vitamin B12 deficiency has not been well established in childhood, the ideal amount of supplemental vitamin B12 is not clear. Vitamin B12 deficiency is classically treated with intramuscular injections. In this study, we aimed to investigate the efficacy of oral therapy in children with vitamin B12 deficiency. Patients with serum cobalamin concentrations <300 pg/mL aged between 6 months to 18 years were included in this prospective study. Children were treated orally either with a combination of multivitamin tablet daily or vitamin B12 ampules...
November 17, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/29188889/vitamin-b12-intake-and-related-biomarkers-associations-in-a-dutch-elderly-population
#8
J P van Wijngaarden, R A M Dhonukshe-Rutten, E M Brouwer-Brolsma, A W Enneman, K M A Swart, S C van Dijk, P H In 't Veld, N M van Schoor, N van der Velde, R de Jonge, P Lips, A G Uitterlinden, L C P G M de Groot
BACKGROUND: Vitamin B12 status is measured by four plasma/ serum biomarkers: total vitamin B12 (total B12), holotranscobalamin (holoTC), methylmalonic acid (MMA) and homocysteine (tHcy). Associations of B12 intake with holoTC and tHcy and associations between all four biomarkers have not been extensively studied. A better insight in these associations may contribute to an improved differentiation between vitamin B12 deficiency and a normal vitamin B12 status. OBJECTIVE: This study investigates associations between vitamin B12 intake and biomarkers and associations between biomarkers...
2017: Journal of Nutrition, Health & Aging
https://www.readbyqxmd.com/read/29174300/long-term-treatment-with-metformin-in-type-2-diabetes-and-methylmalonic-acid-post-hoc-analysis-of-a-randomized-controlled-4-3year-trial
#9
Mattijs Out, Adriaan Kooy, Philippe Lehert, Casper A Schalkwijk, Coen D A Stehouwer
AIMS: Metformin treatment is associated with a decrease of serum vitamin B12, but whether this reflects tissue B12 deficiency is controversial. We studied the effects of metformin on serum levels of methylmalonic acid (MMA), a biomarker for tissue B12 deficiency, and on onset or progression of neuropathy. METHODS: In the HOME trial, 390 insulin-treated patients with type 2 diabetes were treated with metformin or placebo for 52months. In a post hoc analysis, we analyzed the association between metformin, MMA and a validated Neuropathy Score (NPS)...
November 8, 2017: Journal of Diabetes and its Complications
https://www.readbyqxmd.com/read/29172662/-maternal-and-neonatal-vitamin-b12-deficiency-detected-by-expanded-newborn-screening
#10
Ferenc Papp, Gábor Rácz, István Lénárt, Jenő Kóbor, Csaba Bereczki, Eszter Karg, Ákos Baráth
INTRODUCTION: Infant vitamin B12 deficiency can manifest as a severe neurodegenerative disorder and is usually caused by maternal deficiency due to vegetarian diet or pernicious anaemia. Its early recognition and treatment can prevent potentially serious and irreversible neurologic damage. Biochemically, vitamin B12 deficiency leads to an accumulation of methylmalonic acid, homocysteine, and propionylcarnitine. Expanded newborn screening using tandem mass spectrometry may identify neonatal and maternal vitamin B12 deficiency by measurement of propionylcarnitine and other metabolites in the dried blood spot sample of newborns...
December 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/29171783/hyperhomocysteinemia-induced-autophagy-and-apoptosis-with-downregulation-of-hairy-enhancer-of-split-1-5-in-cortical-neurons-in-mice
#11
Jing-Wen Zhang, Ru Yan, Yu-Sheng Tang, Yong-Zhen Guo, Yue Chang, Li Jing, Yi-Li Wang, Jian-Zhong Zhang
It has been reported that hyperhomocysteinemia (HHcy) is associated with neurodegenerative and cardiovascular diseases. However, little is known about brain histomorphology, neuronal organelles, and hairy enhancer of split ( hes) expression under HHcy. In this study, non-HHcy and HHcy induced by high-methionine diet in apolipoprotein E-deficient (Apo E-/-) mice were comparatively investigated. The histomorphology, ultrastructure, autophagosomes, apoptosis, and expression of proteins, HES1, HES5 and P62, were designed to assess the effects of HHcy on brain...
November 1, 2017: International Journal of Immunopathology and Pharmacology
https://www.readbyqxmd.com/read/29169447/metabolic-and-nutritional-consequences-of-urinary-diversion-using-intestinal-segments-to-reconstruct-the-urinary-tract
#12
REVIEW
Joshua D Roth, Michael O Koch
Intestinal segments in various forms have been used to reconstruct the urinary tract since the mid-1800s. Currently, many different forms of continent and incontinent diversion options exist. Incorporating bowel mucosa within the urinary tract leads to predictable metabolic and nutritional consequences. The use of ileum or colon can cause a hyperchloremic metabolic acidosis, vitamin B12 deficiency, osteoporosis, fat malabsorption, urinary calculi, and ammoniagenic encephalopathy. Due to metabolic and nutritional consequences associated with the use of jejunum and gastric segments, the use of these bowel segments is not recommended...
February 2018: Urologic Clinics of North America
https://www.readbyqxmd.com/read/29168737/prevalence-and-predictors-of-subclinical-micronutrient-deficiency-in-german-older-adults-results-from-the-population-based-kora-age-study
#13
Romy Conzade, Wolfgang Koenig, Margit Heier, Andrea Schneider, Eva Grill, Annette Peters, Barbara Thorand
Subclinical micronutrient deficiency in older adults is associated with chronic age-related diseases and adverse functional outcomes. In Germany, the older population is at risk of insufficient micronutrient intake, but representative studies on micronutrient status in old and very old adults are scarce. This study's objectives were to estimate the prevalence of subclinical vitamin D, folate, vitamin B12 and iron deficiencies among older adults, aged 65 to 93, from the KORA-Age study in Augsburg, Germany (n = 1079), and to examine associated predictors, using multiple logistic regression...
November 23, 2017: Nutrients
https://www.readbyqxmd.com/read/29159972/vitamin-b12-deficiency-and-impaired-expression-of-amnionless-during-aging
#14
Alice Pannérec, Eugenia Migliavacca, Antonio De Castro, Joris Michaud, Sonia Karaz, Laurence Goulet, Serge Rezzi, Tze Pin Ng, Nabil Bosco, Anis Larbi, Jerome N Feige
BACKGROUND: Physical frailty and loss of mobility in elderly individuals lead to reduced independence, quality of life, and increased mortality. Vitamin B12 deficiency has been linked to several age-related chronic diseases, including in the musculo-skeletal system, where vitamin B12 deficiency is generally believed to be linked to poor nutritional intake. In the present study, we asked whether aging and frailty associate with altered vitamin B12 homeostasis in humans and investigated the underlying molecular mechanisms using preclinical models...
November 21, 2017: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/29157558/cutaneous-hyperpigmentation-in-vitamine-b12-deficiency
#15
A García-Villa, C Cabañuz
No abstract text is available yet for this article.
November 17, 2017: Revista Clínica Española
https://www.readbyqxmd.com/read/29152237/analysis-of-recipes-of-home-prepared-diets-for-dogs-and-cats-published-in-portuguese
#16
Vivian Pedrinelli, Márcia de O S Gomes, Aulus C Carciofi
The present study evaluated recipes of home-prepared diets for dogs and cats published in Portuguese. A total of 106 diets were evaluated: eighty for dogs, twenty-four for cats and two intended for both species. A commercial software package was used to analyse the diets, and an ingredient chemical composition database was built based on the Brazilian Tables of Food Composition and United States Department of Agriculture Nutrient Database. The estimated chemical composition of each recipe was compared with the Nutritional Guidelines for Complete and Complementary Pet Food for Cats and Dogs (Fédération Européenne de L'industrie des Aliments Pour Animaux Familiers; FEDIAF, 2014) recommendations for maintenance (as units/MJ)...
2017: Journal of Nutritional Science
https://www.readbyqxmd.com/read/29150289/the-cause-of-multiple-sclerosis-is-autoimmune-attack-of-adenosyltransferase-thereby-limiting-adenosylcobalamin-production
#17
J L Boucher
The pathogenesis of multiple sclerosis (MS) begins with an infection by a bacterium from the class of bacteria that produce and utilize adenosylcobalamin (AdoCbl) and possess an adenosyl transferase enzyme (ATR); these bacteria are the exogenous antigens that cause MS. Human ATR is homologous to bacterial ATR and B cells produce anti-ATR antibodies as an autoimmune response thereby reducing the concentration of ATR and thus limiting production of AdoCbl, one of the two bioactive forms of vitamin B12. The next step in MS pathogenesis is a period of subclinical AdoCbl deficiency over a period of many years resulting in production of odd-carbon-number fatty acids that are incorporated into myelin rendering it antigenic...
November 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/29149073/micronutrient-deficiencies-among-breastfeeding-infants-in-tanzania
#18
Alexandra L Bellows, Emily R Smith, Alfa Muhihi, Christina Briegleb, Ramadhani A Noor, Salum Mshamu, Christopher Sudfeld, Honorati Masanja, Wafaie W Fawzi
Infant mortality accounts for the majority of child deaths in Tanzania, and malnutrition is an important underlying cause. The objectives of this cross-sectional study were to describe the micronutrient status of infants in Tanzania and assess predictors of infant micronutrient deficiency. We analyzed serum vitamin D, vitamin B12, folate, and ferritin levels from 446 infants at two weeks of age, 408 infants at three months of age, and 427 mothers three months post-partum. We used log-Poisson regression to estimate relative risk of being deficient in vitamin D and vitamin B12 for infants in each age group...
November 17, 2017: Nutrients
https://www.readbyqxmd.com/read/29129351/is-serum-methylmalonic-acid-a-reliable-biomarker-of-vitamin-b12-status-in-children-with-short-bowel-syndrome-a-case-series
#19
Lissette Jimenez, Danielle A Stamm, Brittany Depaula, Christopher P Duggan
We describe 3 patients with short bowel syndrome who had persistently elevated serum methylmalonic acid (MMA) levels while being treated for vitamin B12 deficiency. Following treatment for presumed small bowel bacterial overgrowth, MMA levels normalized. Among patients with short bowel syndrome, MMA levels may have limited specificity for vitamin B12 deficiency.
November 9, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/29120005/peripheral-neuropathy-due-to-recreational-use-of-nitrous-oxide-presenting-after-an-ankle-sprain-with-foot-drop
#20
Jackson A Middleton, John A Roffers
A 22-year-old man was referred for orthopedic follow-up after an ankle injury. Initial evaluation in urgent care included radiographs with negative findings. After a delayed presentation, a course of functional treatment was recommended. Subsequently, he developed a deep venous thrombosis and pulmonary emboli. He was found to be factor V Leiden deficient and was fully anticoagulated on warfarin. Later reevaluation revealed a steppage gait and foot drop. Electrodiagnostic studies (ie, electromyography and nerve conduction studies) revealed a severe peripheral polyneuropathy...
November 8, 2017: Orthopedics
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