Serum Vitamin B12 Levels and Vitamin B12 Binding Capacity in Pregnant and Non-pregnant Europeans and West Indians

@article{LowBeer1968SerumVB,
  title={Serum Vitamin B12 Levels and Vitamin B12 Binding Capacity in Pregnant and Non-pregnant Europeans and West Indians},
  author={Thomas S. Low-Beer and C. F. McCarthy and W. I. Austad and A. Brzechwa-Ajdukiewicz and Alan Ernest Alfred Read},
  journal={British Medical Journal},
  year={1968},
  volume={4},
  pages={160 - 161}
}
The vitamin B12 level and the capacity of serum to bind B12 are higher in the West Indian population living in Great Britain than in Europeans. The B12 level fell during pregnancy in both groups but remained higher in the West Indians. West Indians had higher levels of IgG. 
Serum vitamin B12 levels and vitamin B12-binding proteins of serum and saliva of healthy Nigerians and Europeans.
TLDR
The serum vitamin B12 tended to be higher in elite Nigerians than in the Europeans living in Nigeria, but there was considerable overlap and it was not clear whether TC differences between Europeans and Nigerians were genetic or acquired.
A sex difference in serum cobalamin and transcobalamin levels.
In healthy young adults, serum levels of cobalamin, unsaturated and total cobalamin binding capacity, and transcobalamin (TC) II are significantly higher in females, while TC III is higher in males.
Vitamin B12 nutrition and metabolism in the baboon (Papio cynocephalus)
TLDR
Measurement of the vitamin B12 content of baboon tissues showed that the liver contained the highest concentration, followed by the pituitary, kidney, heart, spleen and pancreas, and the distribution of radioactivity along the wall of the intestinal tract after an oral dose of [57Co]cyanocobalamin suggested that the distal half of the small intestine was the main site of vitamin B 12 absorption.
Values of water-soluble vitamins in blood and urine of Japanese young men and women consuming a semi-purified diet based on the Japanese Dietary Reference Intakes.
TLDR
There was a significant difference in the urinary excretion of cyanocobalamin and total folates between men and women and these values will be useful for the nutritional assessment of water-soluble vitamins for Japanese, although the examination period was short.
INFLUENCE OF VITAMIN B12 STATUS ON THE INACTIVATION OF METHIONINE SYNTHASE BY NITROUS OXIDE
TLDR
It is concluded that some patients with reduced serum concentrations of B12 may be at a disadvantage with nitrous oxide anaesthesia, as there was evidence that inactivation byNitrous oxide was more rapid in patiens with small concentrations ofB12.
Cobalamins in human pregnancy and lactation
TLDR
The findings suggest that methylcobalamin may be a more labile plasma form of the vitamin than 5-deoxyadenosyl cobalamin, and their bearing on problems of cobalamins transport is discussed.
Clinical chemistry of pregnancy.
  • T. Lind
  • Medicine
    Advances in clinical chemistry
  • 1980
Nutrition and Pregnancy
TLDR
Pregnancy seems to have two phases: a “maternal phase,” which occurs during the first half of gestation and prepares the maternal organism for future fetal demands, and a "fetal phase” of maximum fetal requirements, occurring during the secondhalf of gestation.
Variant-specific differences in human unsaturated transcobalamin II
TLDR
The results obtained in the present investigation indicate that the variant-specific variation in the apo- TC2 concentration is caused by differences in the total-TC2 concentration rather than in the Cbl binding affinity.
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