Overview
- The peer‑reviewed paper published online Sept. 18 reports that forebrain/midbrain and hindbrain come from two parallel progenitor populations rather than a single early pool.
- Researchers identified mutually exclusive progenitors marked by the genes Otx2 (anterior) and Gbx2 (posterior) that do not overlap during gastrulation.
- Chromatin profiling showed the two progenitor types have distinct DNA‑packaging states that commit cells to separate fates and prevent one type from becoming the other.
- Using that developmental program, the team guided human pluripotent stem cells to become functional hindbrain motor neurons that fired action potentials and expressed hindbrain‑segment proteins.
- The pattern was seen across multiple species, suggesting deep evolutionary roots, and authors plan to use the new cells to study brainstem diseases such as SMA and ALS while probing spinal cord origins next.