To investigate whether periodontitis accelerates CD4+ T-cell senescence and its subsequent impact on systemic diseases, particularly rheumatoid arthritis.
Key Findings:
LIP group showed higher proportions of PD-1+CD153+ cells after in vitro stimulation, peaking at 18 weeks.
Elevated SASP cytokine levels and increased SA β-gal-positive cells were observed in the LIP group.
RNA-seq analysis revealed numerous differentially expressed genes related to senescence in unstimulated helper T cells from the LIP group.
Adoptive transfer of CD4+ T cells from the LIP group exacerbated collagen antibody-induced arthritis.
Interpretation:
Severe periodontal inflammation induces a 'senescence-primed' status in helper T cells, potentially exacerbating rheumatoid arthritis.
Limitations:
Study conducted in a mouse model, which may not fully replicate human conditions.
Focus on male mice may limit generalizability to female immune responses and their potential differences in periodontitis and arthritis.
Conclusion:
Findings highlight a novel cellular mechanism linking periodontitis to systemic disease, with implications for understanding the role of oral health in autoimmune conditions.
Higher oxidative balance was associated with lower mortality, while greater systemic inflammation was linked to increased risk in a US cohort of patients with rheumatoid arthritis.
