Human lymph node fibroblasts show cellular aging features before rheumatoid arthritis onset
Fibroblasts from individuals at risk for rheumatoid arthritis exhibit impaired adipogenic differentiation and downregulated DNA repair and cell cycle pathways.
RMD open · Jiménez-Martínez M et al. · Paper published 1 Oct 2026
In a human cell study, researchers analyzed primary lymph node fibroblasts from healthy controls, individuals at risk of rheumatoid arthritis, and patients with established disease. The team isolated cells from inguinal lymph node core biopsies to evaluate differentiation capacity and age-associated alterations. Using adipogenic differentiation assays, they tested cellular plasticity, while bulk RNA sequencing tracked transcriptional shifts. Fibroblasts from at-risk individuals and rheumatoid arthritis patients showed impaired adipogenic capacity, forming fewer lipid droplet-positive cells upon differentiation. Transcriptomic analyses revealed the downregulation of cell cycle, DNA repair, and differentiation pathways. In addition, the cells failed to upregulate the cell cycle switch G0S2 upon stimulation. These coordinated defects indicate that features of cellular aging emerge prior to clinical rheumatoid arthritis onset.
Why it matters
The findings indicate that cellular aging signatures in structural lymph node cells precede systemic inflammatory symptoms. This suggests that early declines in stromal cell fitness could contribute to the loss of immune homeostasis in age-associated autoimmune diseases.
Caveats
The findings rely on in vitro functional assays and bulk RNA sequencing from biopsy-derived cells rather than in vivo tissue models. The abstract also does not provide sample sizes or report longitudinal outcomes showing which at-risk individuals ultimately developed rheumatoid arthritis.
Written from the paper’s abstract, and every claim checked against it before publishing. Read the paper for the full methods and data.
The paper
Early features of cellular ageing impair differentiation capacity in human lymph node fibroblasts prior to rheumatoid arthritis onset
Jiménez-Martínez M, De Jong TA, Houtman M et al.
RMD open · 1 Oct 2026 · Peer-reviewed
- Relevance
- Relevant
- News value
- Notable
- Evidence
- Cells
- Status
- Peer-reviewed
More on Cellular senescence
See allDasatinib and quercetin reduce liver fibrosis in a phase-2 MASH trial
The senolytic combination improved liver fibrosis without disease worsening in nearly half of treated participants while lowering cellular senescence markers.
Nature metabolism · Koning M et al.
A distinct p21-driven macrophage senotype accumulates during aging and liver disease
Researchers identified a p53-p21-Cyclin D2 axis that governs senescent macrophages in mice and human liver cirrhosis and can be cleared with senolytics.
bioRxiv · Torres G et al.
DNA methylation proxies of senescence markers track human disease and mortality
The new blood-based tools estimate senescence gene activity to predict incident diseases, all-cause mortality, and clinical treatment responses.
medRxiv · Simpson DJ et al.
Bispecific T cell engager eliminates senescent cells in mice and nonhuman primates
Monitored by serum transaminase levels, low doses of the drug alleviated age-related pathologies without causing the hepatotoxicity seen at higher doses.
Aging cell · Deng J et al.
A deep learning score for cellular senescence predicts human mortality and disease risk
The proteomic biomarker tracked chronic illness risk in the UK Biobank and shifted following an 18-month multimodal exercise intervention.
Aging cell · Zhao S et al.