Process genes list: An approach to link genetics and human brain imaging

Area of Science:

• Neuroscience
• Genetics
• Medical Imaging

Background:

• Integrating human genetics and brain imaging is complex due to multiple comparison issues.
• Existing methods struggle to bridge the gap between genetic associations and specific brain regions.

Purpose of the Study:

• To introduce a novel method, ProcessGeneLists (PGL), for linking human genetics and brain imaging data.
• To reduce the problem of multiple comparisons in genetic and imaging studies.
• To facilitate the investigation of gene-brain interactions in disease.

Main Methods:

• ProcessGeneLists (PGL) identifies brain regions of interest (ROIs) by analyzing the co-expression of disease-associated genes.
• It calculates normalized mRNA expression averages for gene lists within brain regions.
• Identified ROIs are then used for targeted brain imaging, followed by genotyping of relevant genes.

Main Results:

• PGL successfully highlighted specific brain regions (habenula, striatum) in a proof-of-concept study.
• Application to alcohol abuse-associated genes identified relevant brain regions including the striatum, habenula, and hippocampus.
• The method demonstrates the potential to identify imaging-relevant genes.

Conclusions:

• ProcessGeneLists (PGL) offers a novel approach to derive brain regions of interest directly from genetic data.
• This method facilitates a more integrated analysis of genetic and brain imaging data.
• PGL redefines the research question to "which genes, via modulation within specific brain regions, are found to be associated with a disease?"