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2016 ; 6
(ä): 32119
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Sphingosine kinase-1, S1P transporter spinster homolog 2 and S1P2 mRNA
expressions are increased in liver with advanced fibrosis in human
#MMPMID27562371
Sato M
; Ikeda H
; Uranbileg B
; Kurano M
; Saigusa D
; Aoki J
; Maki H
; Kudo H
; Hasegawa K
; Kokudo N
; Yatomi Y
Sci Rep
2016[Aug]; 6
(ä): 32119
PMID27562371
show ga
The role of sphingosine 1-phosphate (S1P) in liver fibrosis or inflammation was
not fully examined in human. Controversy exists which S1P receptors, S1P1 and
S1P3 vs S1P2, would be importantly involved in its mechanism. To clarify these
matters, 80 patients who received liver resection for hepatocellular carcinoma
and 9 patients for metastatic liver tumor were enrolled. S1P metabolism was
analyzed in background, non-tumorous liver tissue. mRNA levels of sphingosine
kinase 1 (SK1) but not SK2 were increased in livers with fibrosis stages 3-4
compared to those with 0-2 and to normal liver. However, S1P was not increased in
advanced fibrotic liver, where mRNA levels of S1P transporter spinster homolog 2
(SPNS2) but not S1P-degrading enzymes were enhanced. Furthermore, mRNA levels of
S1P2 but not S1P1 or S1P3 were increased in advanced fibrotic liver. These
increased mRNA levels of SK1, SPNS2 and S1P2 in fibrotic liver were correlated
with ?-smooth muscle actin mRNA levels in liver, and with serum ALT levels. In
conclusion, S1P may be actively generated, transported to outside the cells, and
bind to its specific receptor in human liver to play a role in fibrosis or
inflammation. Altered S1P metabolism in fibrotic liver may be their therapeutic
target.
|*Gene Expression Regulation
[MESH]
|Aged
[MESH]
|Anion Transport Proteins/*biosynthesis
[MESH]
|Female
[MESH]
|Humans
[MESH]
|Liver Cirrhosis/*metabolism/pathology
[MESH]
|Liver/*metabolism/pathology
[MESH]
|Male
[MESH]
|Phosphotransferases (Alcohol Group Acceptor)/*biosynthesis
[MESH]