Dynamic remodeling of the transcriptional landscape drives Merkel cell specification and mechanosensory differentiation.

JunB and Pou4f1 orchestrate a triphasic transcriptional program critical for Merkel cell differentiation and mechanosensory function.

• Why it matters: Understanding the regulatory mechanisms of Merkel cell fate is essential for insights into touch sensation and potential therapeutic targets for sensory disorders and Merkel cell carcinoma.
• What they did: Using single-cell RNA sequencing, the study mapped a conserved three-stage developmental trajectory of Merkel cells, identifying key regulators JunB, Pou4f1, Barhl1, and Atoh1, and validated findings through lineage tracing and cross-species analysis.
• The result: The findings reveal a detailed transcriptional network controlling Merkel cell specification, enabling advances in sensory restoration strategies and targeted interventions for Merkel cell carcinoma.