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Regulation of neuroendocrine plasticity by the RNA-binding protein ZFP36L1
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Regulation of neuroendocrine plasticity by the RNA-binding protein ZFP36L1
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Journal Article
Regulation of neuroendocrine plasticity by the RNA-binding protein ZFP36L1
2022
Overview
Some small cell lung cancers (SCLCs) are highly sensitive to inhibitors of the histone demethylase LSD1. LSD1 inhibitors are thought to induce their anti-proliferative effects by blocking neuroendocrine differentiation, but the mechanisms by which LSD1 controls the SCLC neuroendocrine phenotype are not well understood. To identify genes required for LSD1 inhibitor sensitivity in SCLC, we performed a positive selection genome-wide CRISPR/Cas9 loss of function screen and found that
ZFP36L1
, an mRNA-binding protein that destabilizes mRNAs, is required for LSD1 inhibitor sensitivity. LSD1 binds and represses ZFP36L1 and upon LSD1 inhibition, ZFP36L1 expression is restored, which is sufficient to block the SCLC neuroendocrine differentiation phenotype and induce a non-neuroendocrine “inflammatory” phenotype. Mechanistically, ZFP36L1 binds and destabilizes SOX2 and INSM1 mRNAs, two transcription factors that are required for SCLC neuroendocrine differentiation. This work identifies ZFP36L1 as an LSD1 target gene that controls the SCLC neuroendocrine phenotype and demonstrates that modulating mRNA stability of lineage transcription factors controls neuroendocrine to non-neuroendocrine plasticity.
LSD1 inhibition blocks the neuroendocrine phenotype of some small cell lung cancers (SCLCs). Here, a genome-wide CRISPR/Cas9 LSD1 inhibitor resistance screen identifies the mRNA-binding protein ZFP36L1 as a gene repressed by LSD1 that when restored inhibits SCLC neuroendocrine differentiation.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 49/91
/ Blocking
/ Butyrate Response Factor 1 - metabolism
/ Cancer
/ CRISPR
/ Genomes
/ Histone Demethylases - genetics
/ Histone Demethylases - metabolism
/ Histones
/ Humanities and Social Sciences
/ Humans
/ Lungs
/ Proteins
/ Repressor Proteins - metabolism
/ RNA-Binding Proteins - genetics
/ Science
/ Small Cell Lung Carcinoma - metabolism
