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Nucleic Acids Research

Nucleic Acids Research

IF: 16.6
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ALKBH5 governs human endoderm fate by regulating the DKK1/4-mediated Wnt/β-catenin activation.

Published:14 October 2024 DOI: 10.1093/nar/gkae707 PMID: 39166492
Zechuan Liang,?Tao Huang,?Wei Li,?Zhaoyi Ma,?Kaipeng Wang,?Ziwei Zhai,?Yixin Fan,?Yu Fu,?Xiaomin Wang,?Yue Qin,?Bo Wang,?Chengchen Zhao,?Junqi Kuang,?Duanqing Pei

Abstract

N6-methyladenonsine (m6A) is ubiquitously distributed in mammalian mRNA. However, the precise involvement of m6A in early development has yet to be fully elucidated. Here, we report that deletion of the m6A demethylase ALKBH5 in human embryonic stem cells (hESCs) severely impairs definitive endoderm (DE) differentiation. ALKBH5-/- hESCs fail to undergo the primitive streak (PS) intermediate transition that precedes endoderm specification. Mechanistically, we show that ALKBH5 deficiency induces m6A hypermethylation around the 3' untranslated region (3'UTR) of GATA6 transcripts and destabilizes GATA6 mRNA in a YTHDF2-dependent manner. Moreover, GATA6 binds to the promoters of critical regulatory genes involved in Wnt/β-catenin signaling transduction, including the canonical Wnt antagonist DKK1 and DKK4, which are unexpectedly repressed upon the dysregulation of GATA6 mRNA metabolism. Remarkably, DKK1 and DKK4 both exhibit a pleiotropic effect in modulating the Wnt/β-catenin cascade and guard the endogenous signaling activation underlying DE formation as potential downstream targets of the ALKBH5-GATA6 regulation. Here, we unravel a role of ALKBH5 in human endoderm formation in vitro by modulating the canonical Wnt signaling logic through the previously unrecognized functions of DKK1/4, thus capturing a more comprehensive role of m6A in early human embryogenesis.

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Procduct Name CAS Molecular Formula Supplier Price
Y27632 (hydrochloride) 129830-38-2 C14H23Cl2N3O 229 suppliers $23.00-$5472.00
Y27632 (hydrochloride) 129830-38-2 C14H23Cl2N3O 229 suppliers $23.00-$5472.00
Y27632 (hydrochloride) 129830-38-2 C14H23Cl2N3O 229 suppliers $23.00-$5472.00
Y27632 (hydrochloride) 129830-38-2 C14H23Cl2N3O 229 suppliers $23.00-$5472.00

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