Clinical and serological features of systemic sclerosis in a Chinese cohort

Clin Rheumatol. 2013 May;32(5):617-21. doi: 10.1007/s10067-012-2145-7. Epub 2012 Dec 28.

Abstract

Our goal was to study the prevalence of systemic sclerosis (SSc) subtypes, autoantibody profile, and pulmonary fibrosis in a large group of Han Chinese. Chinese SSc patients (n = 419) were recruited from a multicenter study including hospitals and outpatient clinics in China. All patients met the American College of Rheumatology classification criteria for SSc. Anti-topoisomerase (ATA), anti-centromere (ACA), anti-RNA polymerase III (anti-RNAP3), and anti-U1-ribonucleoprotein (anti-U1RNP) were detected utilizing commercially available kits. The clinical and autoantibody information in Chinese patients was compared to that in the US Caucasian patients (n = 834), recruited from the Genetics versus Environment in Scleroderma Outcome Study and Scleroderma Family Registry. Chi-square test was utilized for the abovementioned comparisons. Chinese patients showed 40.3 % limited (lcSSc) and 59.7 % diffuse (dcSSc) forms of SSc. ATA was found in 59.9 %, ACA in 13.4 %, anti-RNAP3 in 1.3 %, and anti-U1RNP in 18 % of Chinese SSc patients. Compared to US patients (65.1 % lcSSc, 34.9 % dcSSc, ATA in 18.7 %, ACA in 32.4 %, anti-RNAP3 in 17.4 %, and anti-U1RNP in 2.8 %), Chinese SSc patients are significantly higher in dcSSc and the frequencies of ATA and anti-U1RNP, but lower in ACA and anti-RNAP3. In addition, pulmonary fibrosis was observed in 78 % Chinese SSc patients and was strongly associated with the presence of ATA. The present study represents the first report of SSc features in a large group of Chinese patients. Clinical subtypes and the frequencies of SSc-related autoantibodies in Chinese SSc patients are significantly different from those in SSc patients of the US Caucasian descent.

Publication types

  • Multicenter Study
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antibodies, Antinuclear / blood
  • Asian People
  • Autoantibodies / blood
  • China
  • Cohort Studies
  • DNA Topoisomerases / immunology
  • Ethnicity
  • Female
  • Humans
  • Male
  • Pulmonary Fibrosis / blood
  • Pulmonary Fibrosis / complications
  • Pulmonary Fibrosis / ethnology
  • Scleroderma, Systemic / blood*
  • Scleroderma, Systemic / complications
  • Scleroderma, Systemic / ethnology*
  • Vereinigte Staaten
  • White People

Substances

  • Antibodies, Antinuclear
  • Autoantibodies
  • anticentromere antibody
  • DNA Topoisomerases