eISSN: 1644-4124
ISSN: 1426-3912
Central European Journal of Immunology
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4/2014
vol. 39
 
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abstract:

Experimental immunology
The influence of vitamin B12 supplementation on the level of white blood cells and lymphocytes phenotype in rats fed a low-protein diet

Sławomir Lewicki, Aneta Lewicka, Bolesław Kalicki, Anna Kłos, Jerzy Bertrandt, Robert Zdanowski

(Centr Eur J Immunol 2014; 39 (4): 419-425)
Online publish date: 2014/12/15
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Protein malnutrition has a negative effect on body composition and some blood parameters, especially in the young growing organism. One of nutritional factors which could protect against negative consequences of protein deficiency may be B group vitamins. The aim of the study was to investigate the effect of vitamin B12 supplementation on the immune system in rats fed a standard and a low-protein diet. Rats were fed a control (20% of energy from protein) or a protein-deficient diet (4.5% of energy from protein). Half of animals in each group were additionally supplemented with vitamin B12 (300% of the daily intake). The white blood cells analysis and lymphocytes immunophenotyping (number and percentage) were performed. Low-protein diets caused disturbances in WBC and lymphocyte subpopulations in both short- (30-day) as well as long-term periods (90-day). Vitamin B12 supplementation significantly reduced the negative impact of protein malnutrition after 30 days, however had no effect on long-term malnutrition. Furthermore, vitamin B12 addition in rats fed a control diet did not affect the studied parameters. This observation opens the promise of use of vitamin B12 supplementation to improve immune system parameters in protein malnourished organisms.
keywords:

protein deficiency, B12 supplementation, immune system, rats

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