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Spatiotemporal Characterisation of Key Cortical Developmental Markers in the Developing Ferret Brain
Rylie-May Alexa Hickmott1,2, Mikaela Barresi1,2, Abdulhameed Bosakhar1
1School of Health and Biomedical Sciences, RMIT University, Melbourne, Victoria, Australia.
Developmental Neuroscience
|July 29, 2025
Summary
This study maps ferret brain development, detailing key cell marker changes during corticogenesis. Findings establish a foundational atlas for studying human cortical malformations using this model.
Area of Science:
- Neuroscience
- Developmental Biology
- Comparative Anatomy
Background:
- The ferret is a valuable model for studying human brain development due to similarities in cortical development and gyrification.
- Limited histological data exists for key developmental stages and progenitor subpopulations in the ferret cortex.
- A comprehensive atlas is needed to fully leverage the ferret model for neurodevelopmental research.
Purpose of the Study:
- To characterize the spatiotemporal expression of crucial progenitor and neuronal markers in the developing ferret cortex.
- To establish a descriptive atlas of neurodevelopmental marker expression across the rostrocaudal axis and cortical layers.
- To provide a foundational dataset for future research on corticogenesis and cortical malformations.
Main Methods:
- Immunofluorescent labeling of ferret brain sections at embryonic (E34, E38) and postnatal (P2, P5, P15, P25) ages.
- Analysis of key markers including PAX6, SOX2, TBR2, HOPX, CPLX3, CTIP2, SATB2, TUJ1, and DCX.
- Semi-quantitative analysis of marker distribution across cortical regions, layers, and developmental time points.
Main Results:
- Early radial glial markers (PAX6, SOX2) decrease postnatally with SVZ expansion.
- Intermediate progenitor marker TBR2 is abundant prenatally, decreasing after birth.
- Outer radial glia (HOPX) show distinct temporal/spatial patterns, increasing in SP and CP postnatally.
- Postnatal marker CPLX3 delineates mature SP neurons with regional patterning.
- Neuronal layer markers (CTIP2, SATB2) show orderly laminar emergence.
- General neuronal markers (TUJ1, DCX) reveal spatiotemporal gradients of maturation and migration.
Conclusions:
- This study provides a detailed histological profile of ferret brain development, filling critical data gaps.
- The established atlas enhances the utility of the ferret model for studying mammalian corticogenesis.
- Findings support translational research on human cortical malformations using the ferret model.
