Deregulated DNA damage response network in Behcet's disease.

Area of Science:

• Immunology
• Genetics
• Molecular Biology

Background:

• Behcet's disease (BD) is a chronic, relapsing systemic vasculitis with unknown causes.
• Genetic studies identified the DNA repair enzyme NEIL1 as a risk factor for BD.

Purpose of the Study:

• To investigate the role of the DNA damage response (DDR) network in Behcet's disease.
• To explore the relationship between NEIL1 expression, DNA damage, and disease activity.

Main Methods:

• Analysis of peripheral blood mononuclear cells from 26 active BD patients, 26 remission BD patients, and 52 healthy controls.
• Measurement of endogenous DNA damage levels.
• Assessment of nucleotide excision repair capacity.
• RNA-sequencing to evaluate gene expression, including NEIL1 and senescence-related genes.

Main Results:

• Active BD patients exhibited increased endogenous DNA damage compared to controls and remission patients.
• BD patients showed impaired nucleotide excision repair.
• Reduced NEIL1 expression correlated with higher DNA damage.
• Expression of senescence-associated genes positively correlated with DNA damage levels.

Conclusions:

• Dysregulation of the DNA damage response network is implicated in Behcet's disease.
• Increased DNA damage and altered DDR contribute to the inflammatory environment in BD.