Investigating the molecular basis of cellular diversity in the nervous system

A single protein called CDX2 acts as a master switch that tells developing cells whether to become spinal cord or brainstem—and that ability disappears once cells commit to becoming neural tissue. This research tackles a fundamental gap in developmental biology: how does the early embryo generate the staggering diversity of cell types that make up the nervous system? The team has already shown that CDX transcription factors are essential for establishing spinal cord identity, but that this power is lost after neural commitment. Their preliminary data also suggests CDX influences posterior identity even before the three germ layers form. The project will now uncover the molecular mechanisms that limit CDX2 expression, how it represses brainstem fates, and its role in generating neural crest cells. This is fundamental science with no immediate clinical application. However, understanding how the nervous system builds its cellular diversity could eventually inform regenerative medicine—for instance, by providing precise instructions to turn stem cells into specific spinal cord or neural crest cell types for repair. Similar foundational work on developmental gene regulation has previously enabled lab-grown organoids and cell replacement therapies.