The impact of vitamin B12 deficiency on infant gut microbiota

Vitamin B12 is known to be vital for cell growth and population during pregnancy. This retrospective and prospective case−control study was aimed to disclose a health risk for pregnant women with vitamin B12 deficiency, as well as the one of the preterm birth. The main tasks set and performed in this research were as follows: to compare the obstetrics anamnesis between the women who gave birth on term and women who gave birth before term; to find the prevalence of vitamin B12 insufficiency in pregnancy; to determine its association with preterm birth and low birth weight; to examine its association with spontaneous abortions, and to investigate its relationship with obesity and hemoglobin levels in pregnant women. The conducted investigation involved 107 women who gave birth before the 37th week of gestation and 101 women who gave birth after the 37th week of gestation at the outpatient clinic of the University Hospital "Maichin Dom" in Bulgaria. Our study revealed a correlation between maternal vitamin B12 deficiency, overweight and low hemoglobin level. Our results showed no significant correlation between serum vitamin B12 level and the risk of preterm birth. However, we found an inverse association between vitamin B12 level and overweight before pregnancy and at the time of giving birth. As well there was confirmed the strong connection between meat consumption and vitamin B12 level. The paper emphasizes that the deficiency of the vitamin occurs most likely in the women with inadequate diets. Such a deficiency is actually confirmed to have serious health consequences for pregnant women and their offspring. Therefore further profound and numerous studies should be performed to properly assess the correlation between vitamin B12 and preterm birth, as well as to understand better the impact of vitamin B12 over pregnant women. Key words: vitamin B12, preterm birth, pregnancy, overweight, hemoglobin.

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Genetic Bases of VitaminB12 Deficiency: Impact of MTHFR, TCN-II and GIF Polymorphisms on Vitamin B12 Level

WSEAS TRANSACTIONS ON BIOLOGY AND BIOMEDICINE ◽

10.37394/23208.2022.19.2 ◽

2022 ◽

Vol 19 ◽

pp. 10-13

Author(s):

Mazhar Salim Al Zoubi

Keyword(s):

Vitamin B12 ◽

Neurological Disorders ◽

Molecular Basis ◽

Vitamin B12 Deficiency ◽

Mthfr Gene ◽

Control Group ◽

Mthfr Polymorphisms ◽

Jordanian Population ◽

B12 Deficiency ◽

The Impact

Vitamin B12 deficiency is associated with serious health problems such as neurological disorders. In Jordan, few studies have evaluated the level of vitamin B21 in the Jordanian population with different prevalence. Genetic predisposition, lifestyle, environment, socioeconomic status, and geographic have been linked to vitamin B12 deficiency. Polymorphisms in the GIF, MTHFR, and Transcobalamins, have been proposed to be associated with the level of vitamin B12. The aim of the current study was to evaluate the impact of certain polymorphisms in MTHFR, TCN-II and GIF genes on the level of vitamin B12 in the Jordanian population. Polymorphic sites of the MTHFR (c.677 C>T, rs1801133 and c.1286A>C, rs1801131), TCN2-776C>G (Arg259Pro) (rs1801198) and GIF-68 A>G (Q5R) genes were analyzed by RFLP and DNA sequencing in a group of vitamin B12 deficient individuals (n = 100). The control group included 100 matching individuals with a normal level of vitamin B12 (>200 ng/mL). Our results showed a significant association between the homologous variant of the TCN2 gene (G776G) and MTHFR c.677C>T genes and vitamin B12 deficiency. On the other hand, The MTHFR c.1286A>C variant and GIF variants did not show significant association with vitamin B12 deficiency. This study expounds the association of TCN2 and MTHFR polymorphisms with cobalamin levels in a Jordanian population and highlights the necessity of further studies to elucidate the molecular basis and impact of TCN2, GIF, and MTHFR gene polymorphisms on vitamin B12 deficiency and associated disorders.

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Vitamin B12 Deficiency Alters the Gut Microbiota in a Murine Model of Colitis

Frontiers in Nutrition ◽

10.3389/fnut.2020.00083 ◽

2020 ◽

Vol 7 ◽

Author(s):

Eberhard Lurz ◽

Rachael G. Horne ◽

Pekka Määttänen ◽

Richard Y. Wu ◽

Steven R. Botts ◽

...

Keyword(s):

Gut Microbiota ◽

Vitamin B12 ◽

Murine Model ◽

Vitamin B12 Deficiency ◽

B12 Deficiency

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Cobalamin and Folate Evaluation: Measurement of Methylmalonic Acid and Homocysteine vs Vitamin B12 and Folate

Clinical Chemistry ◽

10.1093/clinchem/46.8.1277 ◽

2000 ◽

Vol 46 (8) ◽

pp. 1277-1283 ◽

Cited By ~ 217

Author(s):

George G Klee

Keyword(s):

Vitamin B12 ◽

Methylmalonic Acid ◽

Megaloblastic Anemia ◽

Significant Risk ◽

Vitamin B12 Deficiency ◽

Significant Risk Factor ◽

Nerve Degeneration ◽

Early Evaluation ◽

B12 Deficiency ◽

The Impact

Abstract Vitamin B12 and folate are two vitamins that have interdependent roles in nucleic acid synthesis. Deficiencies of either vitamin can cause megaloblastic anemia; however, inappropriate treatment of B12 deficiency with folate can cause irreversible nerve degeneration. Inadequate folate nutrition during early pregnancy can cause neural tube defects in the developing fetus. In addition, folate and vitamin B12 deficiency and the compensatory increase in homocysteine are a significant risk factor for cardiovascular disease. Laboratory support for the diagnosis and management of these multiple clinical entities is controversial and somewhat problematic. Automated ligand binding measurements of vitamin B12 and folate are easiest to perform and widely used. Unfortunately, these tests are not the most sensitive indicators of disease. Measurement of red cell folate is less dependent on dietary fluctuations, but these measurements may not be reliable. Homocysteine and methylmalonic acid are better metabolic indicators of deficiencies at the tissue level. There are no “gold standards” for the diagnosis of these disorders, and controversy exists regarding the best diagnostic approach. Healthcare strategies that consider the impact of laboratory tests on the overall costs and quality of care should consider the advantages of including methylmalonic acid and homocysteine in the early evaluation of patients with suspected deficiencies of vitamin B12 and folate.

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Modelling the impact of mandatory folic acid fortification of bread or flour in Ireland on the risk of occurrence of NTD-affected pregnancies in women of childbearing age and on risk of masking vitamin B12 deficiency in older adults

European Journal of Nutrition ◽

10.1007/s00394-019-02111-4 ◽

2019 ◽

Vol 59 (6) ◽

pp. 2631-2639

Author(s):

Laura Kehoe ◽

Janette Walton ◽

Sinead M. Hopkins ◽

Breige A. McNulty ◽

Anne P. Nugent ◽

...

Keyword(s):

Older Adults ◽

Folic Acid ◽

Vitamin B12 ◽

Vitamin B12 Deficiency ◽

Women Of Childbearing Age ◽

Childbearing Age ◽

Folic Acid Fortification ◽

B12 Deficiency ◽

The Impact

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Treatment of vitamin B12 deficiency in elderly decreases the high levels of lipid parameters: A retrospective study

International Journal of Research in Pharmaceutical Sciences ◽

10.26452/ijrps.v11ispl4.4249 ◽

2020 ◽

Vol 11 (SPL4) ◽

pp. 1093-1098

Author(s):

Husni Farah ◽

Bushra Abdul-Hadi ◽

Jehad F. Alhmoud ◽

Atef Al-Othman

Keyword(s):

Vitamin B12 ◽

Total Cholesterol ◽

Age Groups ◽

Vitamin B12 Deficiency ◽

Density Lipoprotein ◽

Age Group ◽

Cross Sectional ◽

B12 Deficiency ◽

The Impact ◽

Lipid Parameters

The majority of people around the world experience the effects of the inadequacy of vitamin B12. A cross-sectional study was carried out at the beginning of April to end of December 2019, to examine the impact of vitamin B12 inadequacy and its treatment in improving total cholesterol, low-density lipoprotein (LDL), high-density lipoprotein (HDL) and triglyceride (TG). The data that contains the levels of vitamin B12, lipid parameters (total cholesterol, LDL, HDL and TG) were gathered from 400 patients (n =400) from various clinical research centres situated in the capital of Jordan, Amman. The patient’s samples were classified into multiple age groups. The data of both total cholesterol and LDL levels were gathered from thirty-five (n=35) patients, their age group is between 55-66 and have begun treatment of vitamin B12 deficiency by intramuscular infusion (1.0 mg) of vitamin B12. Almost 20.5% of the studied individuals (n=400) are found to be vitamin B12 deficient, as the level of vitamin B12 was equal to (<190 ng/ml). The age group (56 - 66) years old was found to have a significant decrease in vitamin B 12 (p< 0.01) and this results was associated with a critical increment in the levels of both total cholesterols (p < 0.01) and LDL p< 0.02) on contrast with other age groups. Our results did not reveal any significant changes in the levels of other lipid parameters in all age groups. Intramuscular injection treatment for thirty days reduces significantly (p< 0.01) the level of vitamin B12. This treatment strategy leads to a decrease in both total cholesterols (p< 0.01) and LDL levels (p< 0.01) substantially.

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55: The Risk of Vitamin B12 Deficiency is Low after Ileal Orthotopic Bladder Substitution

The Journal of Urology ◽

10.1016/s0022-5347(18)37317-8 ◽

2004 ◽

Vol 171 (4S) ◽

pp. 15-15

Author(s):

Urs E. Studer ◽

Richard Aebischer ◽

Katharina Ochsner ◽

Werner W. Hochreiter

Keyword(s):

Vitamin B12 ◽

Vitamin B12 Deficiency ◽

B12 Deficiency ◽

Bladder Substitution

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Bioavailability of Vitamin B12

International Journal for Vitamin and Nutrition Research ◽

10.1024/0300-9831/a000041 ◽

2010 ◽

Vol 80 (45) ◽

pp. 330-335 ◽

Cited By ~ 28

Author(s):

Lindsay Helen Allen

Keyword(s):

Vitamin B12 ◽

Vitamin B12 Deficiency ◽

The Elderly ◽

Radioactive Isotopes ◽

Animal Source Foods ◽

Dietary Requirements ◽

In Vivo Labeling ◽

B12 Deficiency ◽

Vitamin B12 Malabsorption

Vitamin B12 deficiency is common in people of all ages who consume a low intake of animal-source foods, including populations in developing countries. It is also prevalent among the elderly, even in wealthier countries, due to their malabsorption of B12 from food. Several methods have been applied to diagnose vitamin B12 malabsorption, including Schillings test, which is now used rarely, but these do not quantify percent bioavailability. Most of the information on B12 bioavailability from foods was collected 40 to 50 years ago, using radioactive isotopes of cobalt to label the corrinoid ring. The data are sparse, and the level of radioactivity required for in vivo labeling of animal tissues can be prohibitive. A newer method under development uses a low dose of radioactivity as 14C-labeled B12, with measurement of the isotope excreted in urine and feces by accelerator mass spectrometry. This test has revealed that the unabsorbed vitamin is degraded in the intestine. The percent bioavailability is inversely proportional to the dose consumed due to saturation of the active absorption process, even within the range of usual intake from foods. This has important implications for the assessment and interpretation of bioavailability values, setting dietary requirements, and interpreting relationships between intake and status of the vitamin.

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Increased monocyte to HDL cholesterol ratio in vitamin B12 deficiency: is it related to cardiometabolic risk?

International Journal for Vitamin and Nutrition Research ◽

10.1024/0300-9831/a000668 ◽

2020 ◽

pp. 1-8

Author(s):

Sanem Kayhan ◽

Nazli Gulsoy Kirnap ◽

Mercan Tastemur

Keyword(s):

Risk Factors ◽

Blood Pressure ◽

Uric Acid ◽

Vitamin B12 ◽

Cardiometabolic Risk ◽

Vitamin B12 Deficiency ◽

Left Ventricular ◽

Cardiometabolic Risk Factors ◽

B12 Deficiency ◽

Deficiency Group

Abstract. Vitamin B12 deficiency may have indirect cardiovascular effects in addition to hematological and neuropsychiatric symptoms. It was shown that the monocyte count-to-high density lipoprotein cholesterol (HDL-C) ratio (MHR) is a novel cardiovascular marker. In this study, the aim was to evaluate whether MHR was high in patients with vitamin B12 deficiency and its relationship with cardiometabolic risk factors. The study included 128 patients diagnosed with vitamin B12 deficiency and 93 healthy controls. Patients with vitamin B12 deficiency had significantly higher systolic blood pressure (SBP), diastolic blood pressure (DBP), MHR, C-reactive protein (CRP) and uric acid levels compared with the controls (median 139 vs 115 mmHg, p < 0.001; 80 vs 70 mmHg, p < 0.001; 14.2 vs 9.5, p < 0.001; 10.2 vs 4 mg/dl p < 0.001; 6.68 vs 4.8 mg/dl, p < 0.001 respectively). The prevalence of left ventricular hypertrophy was higher in vitamin B12 deficiency group (43.8%) than the control group (8.6%) (p < 0.001). In vitamin B12 deficiency group, a positive correlation was detected between MHR and SBP, CRP and uric acid (p < 0.001 r:0.34, p < 0.001 r:0.30, p < 0.001 r:0.5, respectively) and a significant negative correlation was detected between MHR and T-CHOL, LDL, HDL and B12 (p < 0.001 r: −0.39, p < 0.001 r: −0.34, p < 0.001 r: −0.57, p < 0.04 r: −0.17, respectively). MHR was high in vitamin B12 deficiency group, and correlated with the cardiometabolic risk factors in this group, which were SBP, CRP, uric acid and HDL. In conclusion, MRH, which can be easily calculated in clinical practice, can be a useful marker to assess cardiovascular risk in patients with vitamin B12 deficiency.

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