Advances in the Comprehensive Tree Shrew Brain Atlas

Area of Science:

• Neuroscience
• Comparative Anatomy
• Developmental Biology

Background:

• Tree shrews are small mammals with a close genetic relationship to primates and humans.
• They possess a primate-like eight-layered neocortex, cognitive potential, and neural flexibility, making them suitable models for neurological disease research.
• Limited studies exist on tree shrew brain development, hindering its full potential as a research model.

Purpose of the Study:

• To provide a comprehensive summary of current knowledge on tree shrew brain development.
• To analyze the developmental characteristics of neural progenitor cells in tree shrews.
• To compare tree shrew brain atlases with those of mice, non-human primates, and humans.

Main Methods:

• Review of 2D and 3D comparative anatomical studies using histological staining and MRI data.
• Analysis of neural progenitor cell development.
• Comparison of brain atlases generated via single-cell sequencing and spatial transcriptomic technologies.

Main Results:

• Tree shrews exhibit primate-like brain features, including an eight-layered neocortex and comparable neurotransmitter systems.
• Comparative analysis reveals similarities and differences in brain organization across species.
• The review synthesizes existing data and identifies gaps in tree shrew brain development research.

Conclusions:

• The tree shrew is a promising animal model for neurological research due to its unique neuroanatomical and genetic characteristics.
• Integrating multi-modal data is crucial for a comprehensive understanding of tree shrew brain development.
• Future research should focus on creating a 4D brain development atlas for this species.