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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Am+J+Pathol
2014 ; 184
(10
): 2791-802
Nephropedia Template TP
gab.com Text
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English Wikipedia
Sphingosine-1-phosphate mediates a reciprocal signaling pathway between stellate
cells and cancer cells that promotes pancreatic cancer growth
#MMPMID25111230
Bi Y
; Li J
; Ji B
; Kang N
; Yang L
; Simonetto DA
; Kwon JH
; Kamath M
; Cao S
; Shah V
Am J Pathol
2014[Oct]; 184
(10
): 2791-802
PMID25111230
show ga
Sphingosine-1-phosphate (S1P) is produced by sphingosine kinase 1 and is
implicated in tumor growth, although the mechanisms remain incompletely
understood. Pancreatic stellate cells (PSCs) reside within the tumor
microenvironment and may regulate tumor progression. We hypothesized that S1P
activates PSCs to release paracrine factors, which, in turn, increase cancer cell
invasion and growth. We used a combination of human tissue, in vitro, and in vivo
studies to mechanistically evaluate this concept. Sphingosine kinase 1 was
overexpressed in human pancreatic tissue, especially within tumor cells. S1P
activated PSCs in vitro and conditioned medium from S1P-stimulated PSCs,
increased pancreatic cancer cell migration, and invasion, which was dependent on
S1P2, ABL1 (alias c-Abl) kinase, and matrix metalloproteinase-9. In vivo studies
showed that pancreatic cancer cells co-implanted with S1P2 receptor knockdown
PSCs led to less cancer growth and metastasis in s.c. and orthotopic pancreatic
cancer models compared with control PSCs. Pancreatic cancer cell-derived S1P
activates PSCs to release paracrine factors, including matrix
metalloproteinase-9, which reciprocally promotes tumor cell migration and
invasion in vitro and cancer growth in vivo.