How marmoset brain cells limit folding revealed — SkimNews
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- Deutsches Primatenzentrum (DPZ) researchers identified cellular mechanisms that explain why common marmosets develop smooth, small brains despite early similarities to other primates.
- Neural progenitor cells in marmosets divide more slowly and have simpler structures than in humans, reducing neuron production and limiting brain folding.
- Brain organoids grown from marmoset and human cells revealed that marmoset progenitor cells have a shorter window of rapid multiplication, contributing to reduced cortical expansion.
- Michael Heide's team combined organoid models with fetal tissue validation, confirming that organoid development at 50 days corresponds to day 90 in actual marmoset brains.
- Lidiia Tynianskaia and César Mateo Bastidas Betancourt co-led the study, showing that coordinated changes in progenitor cell behavior drive primate neocortical downscaling.
Why it matters: Understanding how small cellular differences reduce neuron production in marmosets clarifies how human brains evolved to become larger and folded. This provides a foundation for studying developmental disorders linked to abnormal brain growth, with direct implications for neuroscience and biomedical research using marmoset models.
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