Brain structure and function changes in inflammatory bowel disease

Area of Science:

• Neurogastroenterology
• Neuroimaging
• Inflammatory Bowel Disease Research

Background:

• The brain-gut axis plays a crucial role in the pathobiology of inflammatory bowel disease (IBD).
• Understanding brain structure and functional connectivity (FC) is essential for elucidating IBD mechanisms.
• Previous research indicates a complex interplay between the central nervous system and gastrointestinal tract in IBD.

Purpose of the Study:

• To investigate differences in brain structure and FC in individuals with IBD compared to healthy controls (HC).
• To explore variations in brain structure and FC between IBD subtypes: ulcerative colitis (UC) and Crohn's disease (CD).
• To establish the relationship between brain functional connectivity and the brain-gut axis in IBD.

Main Methods:

• Magnetic resonance imaging (MRI) was employed to assess brain structure and FC.
• The study included 111 participants with IBD (76 UC, 35 CD) and 74 HC.
• Voxel-based morphometry, region-of-interest analysis, and independent component analysis were utilized.

Main Results:

• Significant differences in brain structure and FC were observed between IBD patients and HC.
• These differences were noted in the default mode, cerebellar, and visual networks.
• Distinct variations in brain structure and FC were identified between UC and CD subtypes.

Conclusions:

• The study confirms significant alterations in brain structure and functional connectivity in individuals with IBD.
• These findings underscore the involvement of the brain-gut axis in the pathophysiology of IBD.
• The results provide a foundation for further research into neurological underpinnings of IBD and potential therapeutic targets.