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J Biol Chem. 2011 Jan 21;286(3):1758-66. doi: 10.1074/jbc.M110.171116. Epub 2010 Nov 17.

The sphingosine 1-phosphate transporter, SPNS2, functions as a transporter of the phosphorylated form of the immunomodulating agent FTY720.

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  • 1Department of Cell Membrane Biology, Institute of Scientific and Industrial Research, Osaka University, Ibaraki, Osaka 567-0047, Japan.

Abstract

FTY720 is a novel immunomodulating drug that can be phosphorylated inside cells; its phosphorylated form, FTY720-P, binds to a sphingosine 1-phosphate (S1P) receptor, S1P(1), and inhibits lymphocyte egress into the circulating blood. Although the importance of its pharmacological action has been well recognized, little is known about how FTY720-P is released from cells after its phosphorylation inside cells. Previously, we showed that zebrafish Spns2 can act as an S1P exporter from cells and is essential for zebrafish heart formation. Here, we demonstrate that human SPNS2 can transport several S1P analogues, including FTY720-P. Moreover, FTY720-P is transported by SPNS2 through the same pathway as S1P. This is the first identification of an FTY720-P transporter in cells; this finding is important for understanding FTY720 metabolism.

PMID:
21084291
[PubMed - indexed for MEDLINE]
PMCID:
PMC3023470
Free PMC Article
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