A single-nucleus transcriptomic atlas of human inner ear development.

Single-nucleus transcriptomic atlas reveals key cell types and developmental mechanisms in human inner ear, highlighting vulnerabilities linked to disease genes.

• Why it matters: Understanding how inner ear cell types develop and are specified is crucial for diagnosing and treating hearing and balance disorders, yet these processes are poorly understood in humans.
• What they did: The study generated HIEDRA, a comprehensive snRNA-seq atlas covering first and second trimester human inner ear tissues, identifying diverse cell populations and regulatory networks, including secretory cells.
• The result: Findings show that Hedgehog signaling suppression is essential for secretory cell development, validated in organoids, providing a valuable resource for advancing inner ear disease research and therapies.