Clinical significance of anti-topoisomerase I antibody levels determined by ELISA in systemic sclerosis

Rheumatology (Oxford). 2001 Oct;40(10):1135-40. doi: 10.1093/rheumatology/40.10.1135.


Objective: To determine the clinical associations of the levels of anti-topoisomerase I (topo I) antibody in patients with systemic sclerosis (SSc).

Methods: Anti-topo I antibody levels were determined by enzyme-linked immunosorbent assay. In a longitudinal study, 125 sera from 21 patients were analysed during a follow-up period of 0.2-4.7 yr.

Results: Anti-topo I antibody levels were correlated positively with skin thickness score and renal vascular resistance, and inversely with percentage vital capacity. In the longitudinal study, five patients with a low anti-topo I antibody level at their first visit exhibited a stable antibody level or a small decrease in the level during the follow-up period, and their skin sclerosis was stable. Of 16 patients with a high anti-topo I antibody level at their first visit, seven showed a stable level, four had an increasing level and five had a decreasing level. The decreasing levels were accompanied mainly by atrophic skin change during the follow-up period, whereas the increasing levels were associated with new onset or worsening of organ involvement.

Conclusions: These results suggest the potential clinical significance of anti-topo I antibody levels in evaluating disease severity and the prognosis in SSc.

MeSH terms

  • Adolescent
  • Adult
  • Aged
  • Autoantibodies / blood*
  • Child
  • Child, Preschool
  • DNA Topoisomerases, Type I / immunology*
  • Enzyme-Linked Immunosorbent Assay
  • Female
  • Humans
  • Longitudinal Studies
  • Male
  • Middle Aged
  • Predictive Value of Tests
  • Scleroderma, Systemic / immunology*
  • Scleroderma, Systemic / pathology*
  • Severity of Illness Index
  • Skin / pathology


  • Autoantibodies
  • DNA Topoisomerases, Type I