Detecting Genetic Associations between ATG5 and Lupus Nephritis by trans-eQTL

Area of Science:

• Genetics
• Immunology
• Systemic Lupus Erythematosus Research

Background:

• Elevated ATG5 expression is linked to systemic lupus erythematosus (SLE).
• Understanding the genetic regulation of ATG5 is crucial for lupus nephritis (LN) research.

Purpose of the Study:

• To investigate genome-wide genetic regulatory mechanisms of ATG5 expression in a Chinese population with LN.
• To identify trans-expression single nucleotide polymorphisms (trans-eSNPs) associated with LN susceptibility.

Main Methods:

• Searched online databases for ATG5 trans-eSNPs.
• Genotyped tagging trans-eSNPs in 280 LN patients and 199 controls using a custom chip.
• Performed clinical and bioinformatic analyses on positive findings.

Main Results:

• Four trans-eSNPs (ANKRD50 rs17008504, AGA rs2271100, PAK7 rs6056923, TET2 rs1391441) showed significant association with LN susceptibility (P < 0.05).
• Seven additional trans-eSNPs exhibited marginal associations (0.05 < P < 0.1).
• Validated correlations between trans-eSNPs, ATG5 expression, and validated regulatory effects, but found no association with disease severity or outcome.

Conclusions:

• Identified 10 potential loci associated with LN susceptibility using a systemic genetics approach.
• These findings may complement future pathway-based genetic studies in SLE and LN.