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2018 ; 38
(3
): ä Nephropedia Template TP
gab.com Text
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English Wikipedia
Elevated HuR in Pancreas Promotes a Pancreatitis-Like Inflammatory
Microenvironment That Facilitates Tumor Development
#MMPMID29133460
Peng W
; Furuuchi N
; Aslanukova L
; Huang YH
; Brown SZ
; Jiang W
; Addya S
; Vishwakarma V
; Peters E
; Brody JR
; Dixon DA
; Sawicki JA
Mol Cell Biol
2018[Feb]; 38
(3
): ä PMID29133460
show ga
Human antigen R (ELAVL1; HuR) is perhaps the best-characterized RNA-binding
protein. Through its overexpression in various tumor types, HuR promotes
posttranscriptional regulation of target genes in multiple core signaling
pathways associated with tumor progression. The role of HuR overexpression in
pancreatic tumorigenesis is unknown and led us to explore the consequences of HuR
overexpression using a novel transgenic mouse model that has a >2-fold elevation
of pancreatic HuR expression. Histologically, HuR-overexpressing pancreas
displays a fibroinflammatory response and other pathological features
characteristic of chronic pancreatitis. This pathology is reflected in changes in
the pancreatic gene expression profile due, in part, to genes whose expression
changes as a consequence of direct binding of their respective mRNAs to HuR.
Older mice develop pancreatic steatosis and severe glucose intolerance. Elevated
HuR cooperated with mutant K-ras(G12D) to result in a 3.4-fold increase in
pancreatic ductal adenocarcinoma (PDAC) incidence compared to PDAC presence in
K-ras(G12D) alone. These findings implicate HuR as a facilitator of pancreatic
tumorigenesis, especially in the setting of inflammation, and a novel therapeutic
target for pancreatitis treatment.