Increased levels of soluble TNF-like cytokine 1A in ankylosing spondylitis

Rheumatology (Oxford). 2013 Mar;52(3):448-51. doi: 10.1093/rheumatology/kes316. Epub 2012 Nov 30.


Objective: To determine the expression of soluble TNF-like cytokine 1A (sTL1A), a new member of the TNF superfamily, in patients with AS.

Methods: Seventy-five consecutive patients with AS [61 males, mean (S.D.) age: 47.2 (15.5) years, disease duration: 20.3 (13.9) years] were included in this study. Forty-four patients were anti-TNF treatment naïve, whereas the remaining patients were on infliximab (n = 21), adalimumab (n = 3) or etanercept (n = 7). The patients' perceived disease activity was recorded by BASDAI and AS DAS using serum CRP levels (ASDAS-CRP), whereas functional status was assessed by BASFI and measurements of spinal mobility (AS Metrology). Serum concentrations of TL1A were measured by ELISA. Twenty-five age- and sex-matched healthy individuals served as controls.

Results: Anti-TNF treatment-naïve patients demonstrated a 2.6-fold higher sTL1A average value [mean (s.e.m.) 581 (157.5) pg/ml] compared with healthy controls [226.7 (48.24) pg/ml, P = 0.042]. The sTL1A levels of anti-TNF-treated patients [178 (42)] were significantly lower than anti-TNF treatment-naïve patients (3.3-fold decrease, P = 0.0038) and comparable to those of healthy controls. No significant association was found between sTL1A level and functional status (BASFI score, AS Metrology parameters) or CRP measured in the same sera; however, a positive correlation was observed between individual levels of sTL1A and both BASDAI (P = 0.008) and ASDAS-CRP (P = 0.058) scores suggesting that sTL1A levels may reflect disease activity in patients with AS.

Conclusion: TL1A is up-regulated in AS, associates with disease activity and is influenced by anti-TNF treatment, suggesting that TL1A may be of pathogenic and potentially of therapeutic importance in AS patients.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Antirheumatic Agents / therapeutic use
  • Biomarkers / blood
  • Case-Control Studies
  • Cross-Sectional Studies
  • Female
  • Humans
  • Male
  • Middle Aged
  • Severity of Illness Index
  • Spondylitis, Ankylosing / blood*
  • Spondylitis, Ankylosing / drug therapy
  • Tumor Necrosis Factor Ligand Superfamily Member 15 / blood*
  • Tumor Necrosis Factor Ligand Superfamily Member 15 / drug effects
  • Tumor Necrosis Factor-alpha / antagonists & inhibitors
  • Up-Regulation
  • Young Adult


  • Antirheumatic Agents
  • Biomarkers
  • TNFSF15 protein, human
  • Tumor Necrosis Factor Ligand Superfamily Member 15
  • Tumor Necrosis Factor-alpha