4.8 Article

Mechanisms underlying divergent responses of genetically distinct macrophages to IL-4

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SCIENCE ADVANCES
卷 7, 期 25, 页码 -

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AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/sciadv.abf9808

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资金

  1. NIH [DK091183, HL147835]
  2. Leducq Transatlantic Network [16CVD01]
  3. Netherlands Organization for Scientific Research
  4. Amsterdam Cardiovascular Sciences Institute
  5. American Heart Association
  6. [DK063491]

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The study evaluated how genetic variations in five inbred strains of mice influence macrophage responses to interleukin-4 (IL-4), revealing strain-specific patterns in gene expression induced by IL-4. Through deep learning and motif mutation analysis, the dominant combinations of transcription factors driving IL-4 enhancer activation were identified in macrophages from each strain.
Mechanisms by which noncoding genetic variation influences gene expression remain only partially understood but are considered to be major determinants of phenotypic diversity and disease risk. Here, we evaluated effects of >50 million single-nucleotide polymorphisms and short insertions/deletions provided by five inbred strains of mice on the responses of macrophages to interleukin-4 (IL-4), a cytokine that plays pleiotropic roles in immunity and tissue homeostasis. Of >600 genes induced >2-fold by IL-4 across the five strains, only 26 genes reached this threshold in all strains. By applying deep learning and motif mutation analyses to epigenetic data for macrophages from each strain, we identified the dominant combinations of lineage-determining and signal-dependent transcription factors driving IL-4 enhancer activation. These studies further revealed mechanisms by which noncoding genetic variation influences absolute levels of enhancer activity and their dynamic responses to IL-4, thereby contributing to strain-differential patterns of gene expression and phenotypic diversity.

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