当前位置： SCI文献检索 > NEUROPHARMACOLOGY期刊下所有文献 > Distinct generation, pharmacology, and distribution of sphingosine 1-phosphate and dihydrosphingosine 1-phosphate in human neural progenitor cells.

Distinct generation, pharmacology, and distribution of sphingosine 1-phosphate and dihydrosphingosine 1-phosphate in human neural progenitor cells.

Abstract：

:In vivo and in vitro studies suggest a crucial role for Sphingosine 1-phosphate (S1P) and its receptors in the development of the nervous system. Dihydrosphingosine 1-phosphate (dhS1P), a reduced form of S1P, is an agonist at S1P receptors, but the pharmacology and physiology of dhS1P has not been widely studied. The mycotoxin fumonisin B1 (FB(1)) is a potent inhibitor of ceramide synthases and causes selective accumulation of dihydrosphingosine and dhS1P. Recent studies suggest that maternal exposure to FB(1) correlates with the development of neural tube defects (NTDs) in which the neural epithelial progenitor cell layers of the developing brain fail to fuse. We hypothesize that the altered balance of S1P and dhS1P in neural epithelial cells contributes to the developmental effects of FB(1). The goal of this work was first to define the effect of FB(1) exposure on levels of sphingosine and dh-sphingosine and their receptor-active 1-phosphate metabolites in human embryonic stem cell-derived neural epithelial progenitor (hES-NEP) cells; and second, to define the relative activity of dhS1P and S1P in hES-NEP cells. We found that dhS1P is a more potent stimulator of inhibition of cAMP and Smad phosphorylation than is S1P in neural progenitors, and this difference in apparent potency may be due, in part, to more persistent presence of extracellular dhS1P applied to human neural progenitors rather than a higher activity at S1P receptors. This study establishes hES-NEP cells as a useful human in vitro model system to study the mechanism of FB(1) toxicity and the molecular pharmacology of sphingolipid signaling. This article is part of a Special Issue entitled 'Post-Traumatic Stress Disorder'.

journal_name

Neuropharmacology

journal_title

Neuropharmacology

authors

Callihan P,Zitomer NC,Stoeling MV,Kennedy PC,Lynch KR,Riley RT,Hooks SB

doi

10.1016/j.neuropharm.2011.10.005

subject

Has Abstract

pub_date

2012-02-01 00:00:00

pages

988-96

issue

2

eissn

0028-3908

issn

1873-7064

pii

S0028-3908(11)00460-6

journal_volume

62

pub_type

杂志文章

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