Hyper-aging in systemic sclerosis: linking genome instability, mitochondrial dysfunction, and inflammaging to
Mohammad Waseem1, Azait Imtiaz1, Amit Datta1
1Department of Genetics.
Current Opinion in Rheumatology
|August 6, 2026
Summary
Systemic sclerosis (SSc) exhibits accelerated biological aging, characterized by immune dysregulation and fibrosis. Targeting aging pathways offers potential new treatments for this autoimmune disease.
Area of Science:
- Immunology
- Gerontology
- Rheumatology
Background:
- Systemic sclerosis (SSc) is a progressive autoimmune disease with fibrosis, vasculopathy, and immune dysregulation.
- SSc shares hallmarks of accelerated biological aging, including genomic instability, telomere attrition, mitochondrial dysfunction, cellular senescence, and chronic innate immune activation.
Purpose of the Study:
- To review recent advances supporting the concept of SSc as a disorder of maladaptive or 'hyper-aging'.
- To explore the relationship between aging mechanisms and SSc progression.
Main Methods:
- Review of recent scientific literature published within the last 18 months.
- Analysis of epigenetic clock studies (e.g., DunedinPACE) and DNA methylation-based aging models.
- Gene expression meta-analysis and transcriptomic/spatial studies.
Main Results:
- Epigenetic clock studies show accelerated biological aging in SSc, especially with interstitial lung disease (SSc-ILD) and severe organ involvement.
- Aging and senescence signatures are enriched in SSc-ILD lung tissue.
- Mechanisms like telomere shortening, mitochondrial dysfunction, and cGAS-STING pathway activation contribute to SSc progression and inflammaging.
Conclusions:
- SSc represents accelerated, dysregulated biological aging with persistent immune activation, mitochondrial stress, and defective genome surveillance.
- Therapeutic strategies targeting aging pathways (mitochondrial dysfunction, cGAS-STING, senescence) may offer new treatment avenues for SSc.
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