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2017 ; 8
(11
): 18280-18295
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Extra-pancreatic invasion induces lipolytic and fibrotic changes in the adipose
microenvironment, with released fatty acids enhancing the invasiveness of
pancreatic cancer cells
#MMPMID28407685
Okumura T
; Ohuchida K
; Sada M
; Abe T
; Endo S
; Koikawa K
; Iwamoto C
; Miura D
; Mizuuchi Y
; Moriyama T
; Nakata K
; Miyasaka Y
; Manabe T
; Ohtsuka T
; Nagai E
; Mizumoto K
; Oda Y
; Hashizume M
; Nakamura M
Oncotarget
2017[Mar]; 8
(11
): 18280-18295
PMID28407685
show ga
Pancreatic cancer progression involves components of the tumor microenvironment,
including stellate cells, immune cells, endothelial cells, and the extracellular
matrix. Although peripancreatic fat is the main stromal component involved in
extra-pancreatic invasion, its roles in local invasion and metastasis of
pancreatic cancer remain unclear. This study investigated the role of adipose
tissue in pancreatic cancer progression using genetically engineered mice
(Pdx1-Cre; LSL-KrasG12D; Trp53R172H/+) and an in vitro model of organotypic fat
invasion. Mice fed a high fat diet had significantly larger primary pancreatic
tumors and a significantly higher rate of distant organ metastasis than mice fed
a standard diet. In the organotypic fat invasion model, pancreatic cancer cell
clusters were smaller and more elongated in shape and showed increased fibrosis.
Adipose tissue-derived conditioned medium enhanced pancreatic cancer cell
invasiveness and gemcitabine resistance, as well as inducing morphologic changes
in cancer cells and increasing the numbers of lipid droplets in their cytoplasm.
The concentrations of oleic, palmitoleic, and linoleic acids were higher in
adipose tissue-derived conditioned medium than in normal medium, with these fatty
acids significantly enhancing the migration of cancer cells. Mature adipocytes
were smaller and the concentration of fatty acids in the medium higher when these
cells were co-cultured with cancer cells. These findings indicate that lipolytic
and fibrotic changes in peripancreatic adipose tissue enhance local invasiveness
and metastasis via adipocyte-released fatty acids. Inhibition of fatty acid
uptake by cancer cells may be a novel therapy targeting interactions between
cancer and stromal cells.