Reassessing Cobalamin Requirements in Cell Culture
Cell Bio, a joint meeting of the American Society for Cell Biology (ASCB) and European Molecular Biology Organization (EMBO), in Washington, D.C.
Publication Date: December 22, 2022
Authors: David J. Elzi, Reggie Jacob, and Vivienne I. Rebel
Introduction
Cobalamin (Vitamin B12) is an essential co-factor for the synthesis of components required for cell growth and maintenance
Cobalamin is important for one-carbon metabolism which is involved with genome methylation and nucleotide synthesis
Cancer cells have increased metabolic needs
We hypothesized that cancer cell proliferation would be negatively affected if grown in cobalamin-deficient medium
Conclusions
Cancer cell lines grew in growth medium with at most 5.38 x 10-11M cobalamin, which is the detection limit of the cobalamin ELISA assay used in our studies
Cobalamin-restriction studies should be mindful of trace amounts of cobalamin in cell culture components, which are difficult to measure with most cobalamin detection assays
Cobalamin detection assays with a lower limit of detection would allow for a more accurate measurement of cobalamin levels in tissue culture reagents, which may lead to a better understanding of cobalamin requirements for cell growth
