Single-cell analysis of chromatin accessibility in the human intestine identifies regulatory programs and clarifies genetic associations in Crohn's disease.

Single-cell chromatin accessibility analysis reveals that Crohn's disease heritability is mainly enriched in T cells and neutrophils, with 30 noncoding variants located within regulatory elements.

• Why it matters: Understanding cell-type-specific contributions to Crohn's disease is crucial for uncovering its complex genetic and immune mechanisms, which remain incompletely characterized.
• What they did: The study generated a detailed atlas of 557,310 candidate cis-regulatory elements across different intestinal cell types from patients and controls, identifying regulatory programs and variant locations.
• The result: This resource clarifies the cellular and regulatory landscape of Crohn's disease, enabling targeted investigations into gene regulation and potential therapeutic strategies.