Clinical and serological heterogeneity in patients with anticentromere antibodies

Shoji Miyawaki1, Hiroko Asanuma, Susumu Nishiyama

  • 1Rheumatic Diseases Center, Kurashiki Medical Center, Okayama, Japan. smutakata@muh.biglobe.ne.jp

Insights

Anticentromere antibodies (ACA) are primarily found in systemic sclerosis (SSc) patients with CREST features. High ACA levels may drive CREST development, while co-occurring antibodies contribute to varied clinical presentations in ACA-positive individuals.

Area of Science:

  • Rheumatology
  • Immunology
  • Autoimmunity

Background:

  • Anticentromere antibodies (ACA) are key serological markers in autoimmune rheumatic diseases.
  • Understanding the clinical heterogeneity associated with ACA is crucial for accurate diagnosis and management.

Purpose of the Study:

  • To investigate the diverse clinical manifestations and serological profiles in patients positive for anticentromere antibodies (ACA).
  • To explore the association between ACA levels, specific clinical features like CREST syndrome, and the presence of other autoantibodies.

Main Methods:

  • Retrospective analysis of 120 patients with confirmed ACA.
  • Detection of ACA via indirect immunofluorescence and anti-CENP-B antibodies by ELISA.
  • Screening for additional antinuclear antibodies (ANA) using double immunodiffusion and/or ELISA.

Main Results:

  • ACA were predominantly identified in patients with systemic sclerosis (SSc; 70%), particularly those with CREST features (calcinosis, Raynaud's phenomenon, esophageal dysmotility, sclerodactyly, telangiectasias).
  • Overlap syndromes were common, occurring in 41.7% of SSc patients and 13.9% of non-SSc patients.
  • Elevated creatine phosphokinase levels, without overt myositis, were observed in a subset of ACA-positive patients.
  • Higher anti-CENP-B ELISA levels were significantly associated with SSc and the presence of CREST features, as well as Sjögren's syndrome.

Conclusions:

  • ACA positivity is strongly linked to systemic sclerosis (SSc) and the CREST phenotype.
  • Elevated ACA levels may be essential for the manifestation of CREST features.
  • The co-occurrence of other autoantibodies (ANA) contributes to the broad spectrum of clinical heterogeneity observed in ACA-positive patients, including overlap syndromes.
Abstract