Transcriptomic gradients of the human cerebellum

Area of Science:

• Neuroscience
• Genomics
• Human Brain Anatomy

Background:

• Transcriptomics has linked gene expression to human brain function and structure, primarily in the cerebral cortex.
• The subcortex, specifically the cerebellum, has been largely overlooked in transcriptomic studies of brain organization.

Purpose of the Study:

• To investigate the relationship between transcriptomics, function, and structure in the human cerebellum.
• To determine if gene expression patterns in the cerebellum correlate with its anatomical and functional organization.

Main Methods:

• Utilized gene expression data from post-mortem human cerebella.
• Integrated transcriptomic data with multi-modal brain atlases.
• Analyzed transcriptomic gradients in relation to cerebellar macroanatomy and functional parcellations.

Main Results:

• Transcriptomic gradients, derived from a subset of genes, aligned with the cerebellum's macroanatomical parcellation, not its functional areas.
• A primary transcriptomic gradient transition was observed at the horizontal fissure in both group and individual cerebella.
• Filtering for cortex-specific genes revealed an alignment with continuous functional gradients of the cerebellum, but not discrete functional areas.

Conclusions:

• Transcriptomics provides a link between gene expression and anatomical structure in the human cerebellum.
• The cerebellum's organization shows distinct transcriptomic patterns compared to the cerebral cortex.
• Gene expression gradients offer a novel perspective on understanding cerebellar structure-function relationships.