Cell Genomics (Feb 2023)

Altered and allele-specific open chromatin landscape reveals epigenetic and genetic regulators of innate immunity in COVID-19

  • Bowen Zhang,
  • Zhenhua Zhang,
  • Valerie A.C.M. Koeken,
  • Saumya Kumar,
  • Michelle Aillaud,
  • Hsin-Chieh Tsay,
  • Zhaoli Liu,
  • Anke R.M. Kraft,
  • Chai Fen Soon,
  • Ivan Odak,
  • Berislav Bošnjak,
  • Anna Vlot,
  • Morris A. Swertz,
  • Uwe Ohler,
  • Robert Geffers,
  • Thomas Illig,
  • Jochen Huehn,
  • Antoine-Emmanuel Saliba,
  • Leif Erik Sander,
  • Reinhold Förster,
  • Cheng-Jian Xu,
  • Markus Cornberg,
  • Leon N. Schulte,
  • Yang Li

Journal volume & issue
Vol. 3, no. 2
p. 100232

Abstract

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Summary: Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection causes severe COVID-19 in some patients and mild COVID-19 in others. Dysfunctional innate immune responses have been identified to contribute to COVID-19 severity, but the key regulators are still unknown. Here, we present an integrative single-cell multi-omics analysis of peripheral blood mononuclear cells from hospitalized and convalescent COVID-19 patients. In classical monocytes, we identified genes that were potentially regulated by differential chromatin accessibility. Then, sub-clustering and motif-enrichment analyses revealed disease condition-specific regulation by transcription factors and their targets, including an interaction between C/EBPs and a long-noncoding RNA LUCAT1, which we validated through loss-of-function experiments. Finally, we investigated genetic risk variants that exhibit allele-specific open chromatin (ASoC) in COVID-19 patients and identified a SNP rs6800484-C, which is associated with lower expression of CCR2 and may contribute to higher viral loads and higher risk of COVID-19 hospitalization. Altogether, our study highlights the diverse genetic and epigenetic regulators that contribute to COVID-19.

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