Glucose-induced β-catenin acetylation enhances Wnt signaling in cancer.

Abstract:

:Nuclear accumulation of β-catenin, a widely recognized marker of poor cancer prognosis, drives cancer cell proliferation and senescence bypass and regulates incretins, critical regulators of fat and glucose metabolism. Diabetes, characterized by elevated blood glucose levels, is associated with increased cancer risk, partly because of increased insulin growth factor 1 signaling, but whether elevated glucose directly impacts cancer-associated signal-transduction pathways is unknown. Here, we show that high glucose is essential for nuclear localization of β-catenin in response to Wnt signaling. Glucose-dependent β-catenin nuclear retention requires lysine 354 and is mediated by alteration of the balance between p300 and sirtuins that trigger β-catenin acetylation. Consequently β-catenin accumulates in the nucleus and activates target promoters under combined glucose and Wnt stimulation, but not with either stimulus alone. Our results reveal a mechanism by which high glucose enhances signaling through the cancer-associated Wnt/β-catenin pathway and may explain the increased frequency of cancer associated with obesity and diabetes.

journal_name

Mol Cell

journal_title

Molecular cell

authors

Chocarro-Calvo A,García-Martínez JM,Ardila-González S,De la Vieja A,García-Jiménez C

doi

10.1016/j.molcel.2012.11.022

subject

Has Abstract

pub_date

2013-02-07 00:00:00

pages

474-86

issue

3

eissn

1097-2765

issn

1097-4164

pii

S1097-2765(12)00979-3

journal_volume

49

pub_type

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