High fructose consumption aggravates inflammation by promoting effector T cell generation via inducing metabolic...

Area of Science:

• Immunology
• Metabolic disease
• Gastroenterology

Background:

• Increased sugar consumption, particularly fructose, is linked to inflammatory diseases.
• The direct impact of fructose on T-cell immunity and inflammatory bowel disease (IBD) is not fully understood.

Purpose of the Study:

• To investigate how high fructose consumption affects T-cell immunity and IBD development.
• To explore the potential of metformin in mitigating fructose-induced immune dysregulation.

Main Methods:

• Studied the effect of high fructose intake on T helper 1 (Th1) and T helper 17 (Th17) cell differentiation in the context of IBD.
• Investigated the roles of mechanistic target of rapamycin complex 1 (mTORC1) and reactive oxygen species (ROS)-mediated transforming growth factor-β (TGF-β) pathways.
• Assessed the therapeutic potential of metformin in a mouse model.

Main Results:

• High fructose consumption accelerates IBD by promoting Th1 and Th17 cell generation.
• Fructose enhances Th1/Th17 differentiation via glutamine metabolism-dependent mTORC1 activation and ROS-mediated TGF-β signaling.
• Metformin effectively reverses these fructose-induced changes by inhibiting mTORC1 and ROS-TGF-β pathways.

Conclusions:

• High fructose intake disrupts immune homeostasis and exacerbates IBD through direct promotion of T-cell immunity.
• Metformin demonstrates therapeutic potential for reversing fructose-induced T-cell immune imbalance and colitis.