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SON DNA‐binding protein mediates macrophage autophagy and responses to intracellular infection
Author(s) -
Gregory David J.,
DeLoid Glen M.,
Salmon Sharon L.,
Metzger Dennis W.,
Kramnik Igor,
Kobzik Lester
Publication year - 2020
Publication title -
febs letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.593
H-Index - 257
eISSN - 1873-3468
pISSN - 0014-5793
DOI - 10.1002/1873-3468.13851
Subject(s) - gene knockdown , biology , autophagy , francisella tularensis , microbiology and biotechnology , rna interference , inflammasome , intracellular , intracellular parasite , gene expression , macrophage , interferon , gene , immunology , inflammation , rna , genetics , in vitro , apoptosis , virulence
Intracellular pathogens affect diverse host cellular defence and metabolic pathways. Here, we used infection with Francisella tularensis to identify SON DNA‐binding protein as a central determinant of macrophage activities. RNAi knockdown of SON increases survival of human macrophages following F. tularensis infection or inflammasome stimulation. SON is required for macrophage autophagy, interferon response factor 3 expression, type I interferon response and inflammasome‐associated readouts. SON knockdown has gene‐ and stimulus‐specific effects on inflammatory gene expression. SON is required for accurate splicing and expression of GBF1, a key mediator of cis ‐Golgi structure and function. Chemical GBF1 inhibition has similar effects to SON knockdown, suggesting that SON controls macrophage functions at least in part by controlling Golgi‐associated processes.