Identification of Mechanisms by Which Genetic Susceptibility Loci Influence Systemic Sclerosis Risk Using Functional...

Area of Science:

• Genomics
• Immunology
• Autoimmune Diseases

Background:

• Systemic Sclerosis (SSc) is a complex autoimmune disease with a significant genetic basis.
• Identifying disease-associated genes is challenging due to variants in noncoding genomic regions.
• Functional genomics offers a pathway to interpret genetic findings and understand disease mechanisms.

Purpose of the Study:

• To translate genetic findings in Systemic Sclerosis into a deeper understanding of the disease.
• To identify novel causal genes and validate known SSc-associated genes.
• To explore cell type-specific interactions and potential therapeutic targets.

Main Methods:

• Functional genomics techniques, including Promoter capture Hi-C and RNA-sequencing.
• Experiments conducted on CD4+ T cells and CD14+ monocytes from SSc patients and healthy controls.
• Differential expression and interaction analyses to link SSc-associated variants with target genes.

Main Results:

• Successfully linked SSc-associated loci to 39 novel potential target genes and confirmed 7 known genes.
• Highlighted CXCR5 as a probable causal gene for the DDX6 locus.
• Identified 15 potential drug targets for repurposing in SSc treatment and observed cell type-specific gene interactions.

Conclusions:

• The study identified potential causal genes for SSc, some acting in a cell type-specific manner.
• These findings suggest novel biological mechanisms underlying SSc pathogenesis.
• The research provides a foundation for developing new therapeutic strategies for SSc.