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Clinical features of systemic sclerosis patients with anti-RNA polymerase III antibody in a single centre in Spain

1, 2, 3, 4, 5, 6, 7, 8

  1. Unit of Systemic Autoimmune Diseases, Department of Internal Medicine, Hospital Universitari Parc Taulí, Universitat Autònoma de Barcelona, Sabadell, Barcelona, Spain.
  2. Unit of Systemic Autoimmune Diseases, Institut de Recerca Vall d’Hebron, Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Spain. alguille@vhebron.net
  3. Department of Inmunology, Hospital Universitari Vall d'Hebron, Universitat Autònoma de Barcelona, Spain.
  4. Unit of Systemic Autoimmune Diseases, Institut de Recerca Vall d’Hebron, Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Spain.
  5. Unit of Systemic Autoimmune Diseases, Institut de Recerca Vall d’Hebron, Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Spain.
  6. Unit of Systemic Autoimmune Diseases, Department of Internal Medicine, Hospital Universitari Parc Taulí, Universitat Autònoma de Barcelona, Sabadell, Barcelona, Spain.
  7. Unit of Systemic Autoimmune Diseases, Institut de Recerca Vall d’Hebron, Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Spain.
  8. Unit of Systemic Autoimmune Diseases, Institut de Recerca Vall d’Hebron, Hospital Universitari Vall d’Hebron, Universitat Autònoma de Barcelona, Spain.

CER11630 Submission on line
2019 Vol.37, N°4 ,Suppl.119 - PI 0041, PF 0048
Clinical aspects

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Rheumatology Article

 

Abstract

OBJECTIVES:
To evaluate the clinical features and survival of patients with positive anti-RNA polymerase III (anti-RNAP III) in a Spanish single centre.
METHODS:
We analysed 221 patients with SSc according to LeRoy and Medsger criteria. Twenty-six patients with positivity for anti-RNAP III antibodies were compared with 195 negative patients. Epidemiological, clinical, immunological features and survival were analysed.
RESULTS:
In patients with anti-RNAP III positivity diffuse cutaneous SSc (dcSSc) subset was the most prevalent (20, 76.9% vs. 35, 17.9%, p < 0.001), with shorter diagnosis delay (4.11 ± 7.34 years vs. 6.77 ± 9.22 years, p = 0.005). Patients with anti-RNAP III antibodies had higher frequency of arterial hypertension (13, 50% vs. 55, 28.2%, p = 0.024), scleroderma renal crisis (SRC) (3, 11.5% vs. 3, 1.5%, p = 0.023), arthritis (9, 34.6% vs. 35, 17.9%, p = 0.046), tendon friction rubs (4, 15.4% vs. 1, 0.5%, p = 0.001) and contractures (5, 19.2% vs. 10, 5.1%, p = 0.02). There were no differences found in the presence of cancer or in global survival. In the multivariate survival analysis, severe interstitial lung disease (ILD) (HR: 8.61, 95%CI 3.40 – 21.81), pulmonary arterial hypertension (PAH) (HR: 4.05, 95%CI 1.42 – 11.61) and SRC (HR: 17.27, 95%CI 3.36 – 88.97) were the only factors associated with poor prognosis.
CONCLUSIONS:
In this cohort anti-RNAP III antibodies are related with dcSSc subset, shorter diagnostic delay and higher prevalence of musculoskeletal involvement, arterial hypertension and SRC. ILD, PAH and SRC were independent prognostic factors.

PMID: 30767873 [PubMed]

Received: 19/08/2018 - Accepted : 30/10/2018 - In Press: 11/02/2019 - Published: 03/10/2019