Nailfold Capillaroscopy Characteristics of Antisynthetase Syndrome and Possible Clinical Associations: Results of a Multicenter International Study

J Rheumatol. 2019 Mar;46(3):279-284. doi: 10.3899/jrheum.180355. Epub 2018 Nov 15.

Abstract

Objective: To describe nailfold videocapillaroscopy (NVC) features of patients with antisynthetase syndrome (AS) and to investigate possible correlations with clinical and serological features of the disease.

Methods: We retrospectively analyzed NVC images of 190 patients with AS [females/males 3.63, mean age 49.7 ± 12.8 yrs, median disease duration 53.7 mos (interquartile range 82), 133 anti-Jo1 and 57 non-anti-Jo1-positive patients]. For each patient, we examined number of capillaries, giant capillaries, microhemorrhages, avascular areas, ramified capillaries, and the presence of systemic sclerosis (SSc)-like pattern. Finally, we correlated NVC features with clinical and serological findings of patients with AS. Concomitantly, a historical cohort of 75 patients with antinuclear antibody-negative primary Raynaud phenomenon (RP) and longterm followup was used as a control group (female/male ratio 4.13/1, mean age 53.9 ± 17.6 yrs) for NVC measures.

Results: NVC abnormalities were observed in 62.1% of AS patients compared with 29.3% of primary RP group (p < 0.001). An SSc-like pattern was detected in 67 patients (35.3%) and it was associated with anti-Jo1 antibodies (p = 0.002) and also with a longer disease duration (p = 0.004). Interestingly, there was no significant correlation between the presence of SSc-like pattern and RP, and only 47% of patients with SSc-like pattern had RP.

Conclusion: NVC abnormalities are commonly observed in AS, independently from the occurrence of RP. The presence of an SSc-like pattern could allow identification of a more defined AS subtype, and prospective studies could confirm the association with clinical and serological features of AS.

Keywords: ANTISYNTHETASE ANTIBODIES; ANTISYNTHETASE SYNDROME; NAILFOLD VIDEOCAPILLAROSCOPY; RAYNAUD PHENOMENON; SYSTEMIC SCLEROSIS PATTERN.

Publication types

  • Multicenter Study

MeSH terms

  • Adult
  • Aged
  • Amino Acyl-tRNA Synthetases / immunology
  • Antibodies, Antinuclear / blood
  • Capillaries / diagnostic imaging
  • Female
  • Follow-Up Studies
  • Humans
  • Male
  • Microscopic Angioscopy / methods*
  • Middle Aged
  • Myositis / diagnostic imaging*
  • Myositis / immunology*
  • Nails / blood supply
  • Raynaud Disease / diagnostic imaging
  • Raynaud Disease / immunology
  • Retrospective Studies

Substances

  • Antibodies, Antinuclear
  • Jo-1 antibody
  • Amino Acyl-tRNA Synthetases

Supplementary concepts

  • Antisynthetase syndrome