Abstract
There is accumulating evidence that H4biopterin is synthesized in cells which do not depend on H4biopterin cofactor but undergo cytokine directed proliferation1. In this case, H4biopterin has a function which is apparently unrelated to its known cofactor role. It modulates the clonal expansion of T cells2–4 and the proliferation of erythroid cells5,6. Closer analysis has shown that it enhances the affinity of the IL-2 receptor complex to its ligand and subsequently affects various aspects of signal transmission7.
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Gütlich, M., Schott, K., Werner, T., Bacher, A., Ziegler, I. (1993). Detection and Quantification of GTP Cyclohydrolase I m RNA. In: Ayling, J.E., Nair, M.G., Baugh, C.M. (eds) Chemistry and Biology of Pteridines and Folates. Advances in Experimental Medicine and Biology, vol 338. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2960-6_32
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DOI: https://doi.org/10.1007/978-1-4615-2960-6_32
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