نتایج جستجو برای: b12 vitamine

تعداد نتایج: 9262  

Journal: :Bioscience, biotechnology, and biochemistry 2007
Masahiro Hayashi Tsugiyo Yukino Fumio Watanabe Emi Miyamoto Yoshihisa Nakano

Newly isolated thraustochytrids showed uptake of vitamin B12 from the culture into the cells. Cultivation of thraustochytrids in a medium containing 1 microg/ml of vitamin B12 greatly increased the contents of vitamin B12 in the cells. Similarly to Schizochytrium limacinum, odd numbered fatty acids decreased in the cells of new isolates cultivated with vitamin B12. Vitamin B12-enriched thrausto...

2010
D. Sean Froese Roy A. Gravel

Vitamin B12 (cobalamin, Cbl) is an essential nutrient in human metabolism. Genetic diseases of vitamin B12 utilisation constitute an important fraction of inherited newborn disease. Functionally, B12 is the cofactor for methionine synthase and methylmalonyl CoA mutase. To function as a cofactor, B12 must be metabolised through a complex pathway that modifies its structure and takes it through s...

Journal: :DMW - Deutsche Medizinische Wochenschrift 2017

2006
C. C. BOOTH

Several observations suggest that the absorption of vitamin B12 may be inhibited by bacteria. Both in experimental animals and in patients with blind loops, strictures, or fistulae involving the small intestine, heavy growths of bacteria have been found in areas of the bowel which are normally sterile (Seyderhelm, Lehmann, and Wichels, 1924; Doig and Girdwood, 1960). In patients with such lesio...

2010
Steven F Werder

INTRODUCTION Although consensus guidelines recommend checking serum B12 in patients with dementia, clinicians are often faced with various questions: (1) Which patients should be tested? (2) What test should be ordered? (3) How are inferences made from such testing? (4) In addition to serum B12, should other tests be ordered? (5) Is B12 deficiency compatible with dementia of the Alzheimer's typ...

Journal: :Blood 1958
R S MENDELSOHN D M WATKIN A P HORBETT J L FAHEY

By ROBERT S. MENDELSOIIN, DONALD M. WATKIN, ANN P. HORBETr AND J OHN L. FAHEY R ECENT STUDIES have demonstrated that virtually all the vitamin B12 in normal serum is bound to serum proteins.1 In chronic myelocytic leukemia tile serum B12 concentration may be increased from 2 to 30 times normal levels.24 At these increased levels, all or almost all of the B12 is protein-bound. However, normal se...

Journal: :Public health nutrition 2016
Nai-Hui Sun Xuan-Zhang Huang Shuai-Bo Wang Yuan Li Long-Yi Wang Hong-Chi Wang Chang-Wang Zhang Cong Zhang Hong-Peng Liu Zhen-Ning Wang

OBJECTIVE The current meta-analysis evaluated the association between vitamin B12 intake and blood vitamin B12 level and colorectal cancer (CRC) risk. DESIGN The PubMed and EMBASE databases were searched. A dose-response analysis was performed with generalized least squares regression, with the relative risk (RR) and 95 % CI as effect values. SETTING The meta-analysis included seventeen stu...

Journal: :The journals of gerontology. Series A, Biological sciences and medical sciences 2014
Anthony Mézière Etienne Audureau Stéphane Vairelles Sébastien Krypciak Michèle Dicko Marguerite Monié Stéphane Giraudier

BACKGROUND Cobalamin deficiency is responsible for hematological, neurological, neurocognitive, and neuropsychiatric impairments and is a risk factor for cardiovascular diseases, particularly in the elderly people. METHODS In order to determine B12 status in old inpatients, a total number of 14,904 hospitalized patients in whom B12 measurements were performed in five hospitals in the Paris me...

حق‌ازلی, مهرداد , شهراد بجستانی, هادی, شوشتری‌زاده, تینا, کبیر, علی,

Some studies have shown the relief of neurosensory signs in diabetic patients by vitamin B12 supplementation. Symptomatic therapy is not a goal in medicine therefore, for detecting causes of this relief, vitamin B12 level was compared in poor and well-controlled diabetic patients in this study. Diabetes mellitus, which is the most common metabolic disease, has systemic effect on ...

Journal: :Bulletin Français de Pisciculture 1981

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