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2015 ; 8
(ä): 3721-30
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NRBP1 is downregulated in breast cancer and NRBP1 overexpression inhibits cancer
cell proliferation through Wnt/?-catenin signaling pathway
#MMPMID26715855
Wei H
; Wang H
; Ji Q
; Sun J
; Tao L
; Zhou X
Onco Targets Ther
2015[]; 8
(ä): 3721-30
PMID26715855
show ga
Nuclear receptor binding protein 1 (NRBP1) is a highly conserved protein that is
ubiquitously expressed across cell types in humans. NRBP1 has been recently
identified as an adaptor protein. It has been suggested that it plays important
roles in cellular homeostasis and the pathophysiology of cancer. To determine
whether NRBP1 is involved in the pathophysiology of breast cancer, we performed a
correlation study between the expression level of NRBP1 and the
clinicopathological features in 92 breast cancer patients. A strong correlation
was detected between NRBP1 expression and advanced histopathology grades, tumor,
node, and metastasis stage, tumor diameter, lymph node involvement, as well as
the recurrence of breast cancer in 92 tested patients. The tumor tissues from
patients also expressed lower NRBP1 than did adjacent healthy tissues.
Furthermore, we overexpressed NRBP1 in MCF-7 and MDA-MB-231 breast cancer cell
lines and found NRBP1 upregulation-inhibited cell proliferation by using
3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide assay. Blocking the
autocrine Wnt signaling pathway by LGK974 could remove the
NRBP1-overexpression-induced inhibition in breast cancer cells. The results of
this study suggest that NRBP1 plays a tumor-suppressive role in breast cancer
pathophysiology, which likely acts through the Wnt/?-catenin signaling pathway.