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Altered DNA methylation underlies monocyte dysregulation and immune exhaustion memory in sepsis.
Caldwell, Blake A; Wu, Yajun; Wang, Jing; Li, Liwu.
Afiliação
  • Caldwell BA; Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061-0910, USA.
  • Wu Y; Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061-0910, USA.
  • Wang J; Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061-0910, USA.
  • Li L; Department of Biological Sciences, Virginia Tech, Blacksburg, VA 24061-0910, USA. Electronic address: lwli@vt.edu.
Cell Rep ; 43(3): 113894, 2024 Mar 26.
Article em En | MEDLINE | ID: mdl-38442017
ABSTRACT
Monocytes can develop an exhausted memory state characterized by reduced differentiation, pathogenic inflammation, and immune suppression that drives immune dysregulation during sepsis. Chromatin alterations, notably via histone modifications, underlie innate immune memory, but the contribution of DNA methylation remains poorly understood. Using an ex vivo sepsis model, we show altered DNA methylation throughout the genome of exhausted monocytes, including genes implicated in immune dysregulation during sepsis and COVID-19 infection (e.g., Plac8). These changes are recapitulated in septic mice induced by cecal slurry injection. Methylation profiles developed in septic mice are maintained during ex vivo culture, supporting the involvement of DNA methylation in stable monocyte exhaustion memory. Methylome reprogramming is driven in part by Wnt signaling inhibition in exhausted monocytes and can be reversed with DNA methyltransferase inhibitors, Wnt agonists, or immune training molecules. Our study demonstrates the significance of altered DNA methylation in the maintenance of stable monocyte exhaustion memory.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Monócitos / Sepse Limite: Animals Idioma: En Revista: Cell Rep Ano de publicação: 2024 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Monócitos / Sepse Limite: Animals Idioma: En Revista: Cell Rep Ano de publicação: 2024 Tipo de documento: Article