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2014 ; 55
(9
): 1839-46
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Export of sphingosine-1-phosphate and cancer progression
#MMPMID24474820
Takabe K
; Spiegel S
J Lipid Res
2014[Sep]; 55
(9
): 1839-46
PMID24474820
show ga
Sphingosine-1-phosphate (S1P) is a bioactive lipid mediator that promotes cell
survival, proliferation, migration, angiogenesis, lymphangiogenesis, and immune
response; all are critical processes of cancer progression. Although some
important roles of intracellular S1P have recently been uncovered, the majority
of its biological effects are known to be mediated via activation of five
specific G protein-coupled receptors [S1P receptor (S1PR)1-S1PR5] located on the
cell surface. Secretion of S1P produced inside cells by sphingosine kinases can
then signal through these receptors in autocrine, paracrine, and/or endocrine
manners, coined "inside-out" signaling of S1P. Numerous studies suggest that
secreted S1P plays important roles in cancer progression; thus, understanding the
mechanism by which S1P is exported out of cells, particularly cancer cells, is
both interesting and important. Here we will review the current understanding of
the transport of S1P out of cancer cells and its potential roles in the tumor
microenvironment.