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Ultrasonographic Evaluation of Salivary Glands for Sjogren's Syndrome: Diagnostic and Monitoring Insights
Published on: October 13, 2023
Genetics and epigenetics in primary Sjögren's syndrome
Juliana Imgenberg-Kreuz1, Astrid Rasmussen1, Kathy Sivils1
1Department of Medical Sciences, Rheumatology and Science for Life Laboratory, Uppsala University, Uppsala, Sweden2Arthritis and Clinical Immunology Research Program, Division of Genomics and Data Sciences, Oklahoma Medical Research Foundation, Oklahoma City, OK, USA.
Primary Sjögren's syndrome (pSS) is a complex autoimmune disease influenced by genetics and epigenetics. Research highlights HLA, IRF5, and STAT4 genes, alongside epigenetic factors like DNA methylation, in pSS development.
Area of Science:
- Immunology
- Genetics
- Epigenetics
Background:
- Primary Sjögren's syndrome (pSS) is a multifactorial autoimmune disease.
- Genetic predisposition, epigenetic changes, and environmental factors contribute to pSS pathogenesis.
- Recent advances include the first genome-wide association studies (GWAS) in pSS.
Purpose of the Study:
- To review published genetic studies on pSS.
- To summarize the current understanding of epigenetic mechanisms in pSS.
- To elucidate the genetic and epigenetic factors contributing to pSS development.
Main Methods:
- Review of genome-wide association studies (GWAS) in pSS.
- Analysis of genetic association signals, including HLA, IRF5, and STAT4.
- Examination of epigenetic mechanisms: DNA methylation, histone modifications, and non-coding RNAs.
Main Results:
- The strongest genetic association signal in pSS is within HLA genes.
- Non-HLA genes IRF5 and STAT4 show consistent associations across ethnicities.
- Many genetic risk variants are in intergenic regions with unknown functional impact.
- Epigenetic mechanisms modulate gene expression and link genome to phenotype.
Conclusions:
- Genetic factors, particularly HLA, IRF5, and STAT4, play a significant role in pSS susceptibility.
- Epigenetic mechanisms are crucial in pSS pathogenesis by influencing gene expression.
- Further research is needed to understand the functional impact of genetic variants and epigenetic modifications in pSS.
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