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2016 ; 7
(50
): 83462-83475
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Tristetraprolin disables prostate cancer maintenance by impairing proliferation
and metabolic function
#MMPMID27825143
Berglund AE
; Scott KE
; Li W
; Yang C
; Fernandez MR
; Schaub FX
; Cleveland JL
; Rounbehler RJ
Oncotarget
2016[Dec]; 7
(50
): 83462-83475
PMID27825143
show ga
Tristetraprolin (TTP) is an RNA-binding protein that post-transcriptionally
suppresses gene expression by delivering mRNA cargo to processing bodies
(P-bodies) where the mRNA is degraded. TTP functions as a tumor suppressor in a
mouse model of B cell lymphoma, and in some human malignancies low TTP expression
correlates with reduced survival. Here we report important prognostic and
functional roles for TTP in human prostate cancer. First, gene expression
analysis of prostate tumors revealed low TTP expression correlates with patients
having high-risk Gleason scores and increased biochemical recurrence. Second, in
prostate cancer cells with low levels of endogenous TTP, inducible TTP expression
inhibits their growth and proliferation, as well as their clonogenic growth.
Third, TTP functions as a tumor suppressor in prostate cancer, as forced TTP
expression markedly impairs the tumorigenic potential of prostate cancer cells in
a mouse xenograft model. Finally, pathway analysis of gene expression data
suggested metabolism is altered by TTP expression in prostate tumor cells, and
metabolic analyses revealed that such processes are impaired by TTP, including
mitochondrial respiration. Collectively, these findings suggest that TTP is an
important prognostic indicator for prostate cancer, and augmenting TTP function
would effectively disable the metabolism and proliferation of aggressive prostate
tumors.