Crohn’s disease and vitamin B12 metabolism.
Dig Dis Sci. 1996 Jul;41(7):1417-22
Authors: Lambert D, Benhayoun S, Adjalla C, Gelot MA, Renkes P, Felden F, Gerard P, Belleville F, Gaucher P, Guéant JL, Nicolas JP
The concentrations of vitamin B12, its analogs, and the haptocorrin and transcobalamin carriers in 21 patients suffering from Crohn’s disease and a group of controls (20 adults) were measured. There were no significant differences in the mean values for vitamin B12, total corrinoids (vitamin B12 + analogs), or vitamin B12 or total corrinoids bound to haptocorrin or transcobalamin of the Crohn’s and control patients. There was a significant increase in the binding capacity of transcobalamin in the Crohn’s patients compared to the controls (P < 0.001), but there was no difference in the binding capacities of haptocorrin. The serum concentrations of the markers of vitamin B12 status, homocysteine and methylmalonic acid, showed an increase (P < 0.01) in homocysteine in the Crohn’s disease patients, but no change in methylmalonic acid. As the hyperhomocysteinemia was associated with normal folate concentrations, there may have been a defect in the activation of the enzyme due to altered intracellular vitamin B12 status.
PMID: 8689919 [PubMed – indexed for MEDLINE]