The Histone Demethylase PHF8 is a Molecular Safeguard of the IFNγ Response

Overview

Journal Nucleic Acids Res

Publisher Oxford University Press

Specialty Biochemistry

Date 2017 Jan 20

PMID 28100697

Citations 12

Authors

Elena Asensio-Juan

Raquel Fueyo

Stella Pappa

Simona Iacobucci

Carmen Badosa

Sergi Lois

Miriam Balada

Laia Bosch-Presegue

Alex Vaquero

Sara Gutierrez

Carme Caelles

Carme Gallego

Xavier de la Cruz

Marian A Martinez-Balbas

Affiliations

Soon will be listed here.

Abstract

A precise immune response is essential for cellular homeostasis and animal survival. The paramount importance of its control is reflected by the fact that its non-specific activation leads to inflammatory events that ultimately contribute to the appearance of many chronic diseases. However, the molecular mechanisms preventing non-specific activation and allowing a quick response upon signal activation are not yet fully understood. In this paper we uncover a new function of PHF8 blocking signal independent activation of immune gene promoters. Affinity purifications coupled with mass spectrometry analysis identified SIN3A and HDAC1 corepressors as new PHF8 interacting partners. Further molecular analysis demonstrated that prior to interferon gamma (IFNγ) stimulation, PHF8 is bound to a subset of IFNγ-responsive promoters. Through the association with HDAC1 and SIN3A, PHF8 keeps the promoters in a silent state, maintaining low levels of H4K20me1. Upon IFNγ treatment, PHF8 is phosphorylated by ERK2 and evicted from the promoters, correlating with an increase in H4K20me1 and transcriptional activation. Our data strongly indicate that in addition to its well-characterized function as a coactivator, PHF8 safeguards transcription to allow an accurate immune response.

Citing Articles

PHF2-mediated H3K9me balance orchestrates heterochromatin stability and neural progenitor proliferation.

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Epigenetic control over the cell-intrinsic immune response antagonizes self-renewal in acute myeloid leukemia.

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Targeting the PHF8/YY1 axis suppresses cancer cell growth through modulation of ROS.

Wu X, Li J, He Q, Li B, He Y, Pan X Proc Natl Acad Sci U S A. 2024; 121(2):e2219352120.

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Loss of PHF8 induces a viral mimicry response by activating endogenous retrotransposons.

Liu Y, Hu L, Wu Z, Yuan K, Hong G, Lian Z Nat Commun. 2023; 14(1):4225.

PMID: 37454216 PMC: 10349869. DOI: 10.1038/s41467-023-39943-y.

Histone demethylases in the regulation of immunity and inflammation.

Qu L, Yin T, Zhao Y, Lv W, Liu Z, Chen C Cell Death Discov. 2023; 9(1):188.

PMID: 37353521 PMC: 10290154. DOI: 10.1038/s41420-023-01489-9.

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