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2017 ; 18
(9
): ä Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
TRIM44 Is a Poor Prognostic Factor for Breast Cancer Patients as a Modulator of
NF-?B Signaling
#MMPMID28885545
Kawabata H
; Azuma K
; Ikeda K
; Sugitani I
; Kinowaki K
; Fujii T
; Osaki A
; Saeki T
; Horie-Inoue K
; Inoue S
Int J Mol Sci
2017[Sep]; 18
(9
): ä PMID28885545
show ga
Many of the tripartite motif (TRIM) proteins function as E3 ubiquitin ligases and
are assumed to be involved in various events, including oncogenesis. In regard to
tripartite motif-containing 44 (TRIM44), which is an atypical TRIM family protein
lacking the RING finger domain, its pathophysiological significance in breast
cancer remains unknown. We performed an immunohistochemical study of TRIM44
protein in clinical breast cancer tissues from 129 patients. The
pathophysiological role of TRIM44 in breast cancer was assessed by modulating
TRIM44 expression in MCF-7 and MDA-MB-231 breast cancer cells. TRIM44 strong
immunoreactivity was significantly associated with nuclear grade (p = 0.033),
distant disease-free survival (p = 0.031) and overall survival (p = 0.027).
Multivariate analysis revealed that the TRIM44 status was an independent
prognostic factor for distant disease-free survival (p = 0.005) and overall
survival (p = 0.002) of patients. siRNA-mediated TRIM44 knockdown significantly
decreased the proliferation of MCF-7 and MDA-MB-231 cells and inhibited the
migration of MDA-MB-231 cells. Microarray analysis and qRT-PCR showed that TRIM44
knockdown upregulated CDK19 and downregulated MMP1 in MDA-MB-231 cells. Notably,
TRIM44 knockdown impaired nuclear factor-kappa B (NF-?B)-mediated transcriptional
activity stimulated by tumor necrosis factor ? (TNF?). Moreover, TRIM44 knockdown
substantially attenuated the TNF?-dependent phosphorylation of the p65 subunit of
NF-?B and I?B? in both MCF-7 and MDA-MB-231 cells. TRIM44 would play a role in
the progression of breast cancer by promoting cell proliferation and migration,
as well as by enhancing NF-?B signaling.