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2016 ; 7
(46
): 74768-74778
Nephropedia Template TP
gab.com Text
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English Wikipedia
Sirtuin 1 stimulates the proliferation and the expression of glycolysis genes in
pancreatic neoplastic lesions
#MMPMID27494892
Pinho AV
; Mawson A
; Gill A
; Arshi M
; Warmerdam M
; Giry-Laterriere M
; Eling N
; Lie T
; Kuster E
; Camargo S
; Biankin AV
; Wu J
; Rooman I
Oncotarget
2016[Nov]; 7
(46
): 74768-74778
PMID27494892
show ga
Metabolic reprogramming is a feature of neoplasia and tumor growth. Sirtuin 1
(SIRT1) is a lysine deacetylase of multiple targets including metabolic
regulators such as p53. SIRT1 regulates metaplasia in the pancreas. Nevertheless,
it is unclear if SIRT1 affects the development of neoplastic lesions and whether
metabolic gene expression is altered.To assess neoplastic lesion development,
mice with a pancreas-specific loss of Sirt1 (Pdx1-Cre;Sirt1-lox) were bred into a
KrasG12D mutant background (KC) that predisposes to the development of pancreatic
intra-epithelial neoplasia (PanIN) and ductal adenocarcinoma (PDAC). Similar
grade PanIN lesions developed in KC and KC;Sirt1-lox mice but specifically early
mucinous PanINs occupied 40% less area in the KC;Sirt1-lox line, attributed to
reduced proliferation. This was accompanied by reduced expression of proteins in
the glycolysis pathway, such as GLUT1 and GAPDH.The stimulatory effect of SIRT1
on proliferation and glycolysis gene expression was confirmed in a human PDAC
cell line. In resected PDAC samples, higher proliferation and expression of
glycolysis genes correlated with poor patient survival. SIRT1 expression per se
was not prognostic but low expression of Cell Cycle and Apoptosis Regulator 2
(CCAR2), a reported SIRT1 inhibitor, corresponded to poor patient survival.These
findings open perspectives for novel targeted therapies in pancreatic cancer.