Gut-brain nexus: Mapping multimodal links to neurodegeneration at biobank scale
- Mohammad Shafieinouri
- Samantha Hong
- Paul Suhwan Lee
- Spencer M. Grant
- Marzieh Khani
- Anant Dadu
- Artur F. Schumacher Schuh
- Mary B. Makarious
- Rodrigo Sandon
- Emily Simmonds
- Hirotaka Iwaki
- Gracelyn Hill
- Cornelis Blauwendraat
- Valentina Escott-Price
- Yue A. Qi
- Alastair J. Noyce
- Armando Reyes-Palomares
- Hampton L. Leonard
- Malu Tansey
- Faraz Faghri
- Andrew B. Singleton
- Mike A. Nalls
- Kristin S. Levine
- Sara Bandres-Ciga
2025-08-27
Alzheimer’s disease (AD) and Parkinson’s disease (PD) are influenced by genetic and environmental factors. We conducted a biobank-scale study to (i) identify endocrine, nutritional, metabolic, and digestive disorders with potential causal or temporal associations with AD/PD risk before diagnosis; (ii) assess plasma biomarkers’ specificity for AD/PD in the context of co-occurring gut related traits and disorders; and (iii) integrate multimodal datasets to enhance AD/PD prediction. Our findings show that several disorders were associated with increased AD/PD risk before diagnosis, with variation in the strength and timing of associations across conditions. Polygenic risk scores reveal lower genetic predisposition for AD/PD in individuals with co-occurring disorders. Moreover, the proteomic profile of AD/PD cases was influenced by comorbid gut-brain axis disorders. Last, our multimodal prediction models outperform single-modality paradigms in disease classification. This endeavor illuminates the interplay between factors involved in the gut-brain axis and the development of AD/PD, opening avenues for therapeutic targeting and early diagnosis.