Multiomics Analyses Identify Genes and Pathways Relevant to Essential Tremor

Area of Science:

• Neuroscience
• Genetics
• Molecular Biology

Background:

• Essential tremor (ET) pathogenesis is poorly understood, with limited knowledge of underlying genetic factors and molecular mechanisms.
• Identifying specific genes and pathways involved in ET is crucial for developing targeted therapies.

Purpose of the Study:

• To identify novel pathways and genes associated with essential tremor (ET) by integrating multiomics approaches.
• To investigate the role of specific genes and molecular mechanisms in ET development and progression.

Main Methods:

• RNA sequencing was performed on cerebellar samples from ET cases and controls.
• Phenome-wide (pheWAS) and genome-wide gene association studies (GWGAS) were conducted.
• Transcriptome-wide association study (TWAS) was utilized to identify novel ET risk genes.

Main Results:

• Several novel dysregulated genes, including CACNA1A and SHF, were identified in ET.
• Enrichment analysis revealed significant involvement of axon guidance, olfactory loss, and calcium channel activity pathways.
• SHF gene underexpression was linked to blood pressure medication used for tremor reduction, and propranolol treatment increased SHF levels in cells.

Conclusions:

• Calcium-related pathways are consistently enriched across multiple analyses in essential tremor.
• The gene SHF shows decreased expression in ET and may be a therapeutic target, as its levels were restored by propranolol.
• Integrating multiomics approaches effectively prioritizes key pathways and genes for essential tremor research.