Should transcobalamin deficiency be treated aggressively? View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2010-06

AUTHORS

Manuel Schiff, Hélène Ogier de Baulny, Ghislaine Bard, Vincent Barlogis, Christian Hamel, Stuart J. Moat, Sylvie Odent, Graham Shortland, Guy Touati, Stéphane Giraudier

ABSTRACT

Transcobalamin (transcobalamin II, TC) transports plasma vitamin B(12) (cobalamin, Cbl) into cells. TC deficiency is a rare autosomal recessive disorder causing intracellular Cbl depletion, which in turn causes megaloblastic bone marrow failure, accumulation of homocysteine and methylmalonic acid, and methionine depletion. The clinical presentation reflects intracellular Cbl defects, with early-onset failure to thrive with gastrointestinal symptoms, pancytopenia, and megaloblastic anemia, sometimes followed by neurological complications. We report the clinical, biological, and molecular findings and the outcome in five TC-deficient patients. The three treated early had an initial favorable outcome, whereas the two treated inadequately had late-onset severe neuro-ophthalmological impairment. Even if the natural course of the disease over time might also result in late-onset symptoms in the aggressively treated patients, these data emphasize that TC deficiency is a severe disorder requiring early detection and probably long-term aggressive therapy. Mutation analysis revealed six unreported mutations in the TCN2 gene. In silico structural analysis showed that these mutations disrupt the Cbl-TC interaction domain and/or the putative transcobalamin-transcobalamin receptor interaction domain. More... »

PAGES

223-229

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10545-010-9074-x

DOI

http://dx.doi.org/10.1007/s10545-010-9074-x

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1031275843

PUBMED

https://www.ncbi.nlm.nih.gov/pubmed/20352340


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