Clinical trial NCT01600352: Specific Autoantibody Testing in Patients With Interstitial Lung Disease
Official title: To Evaluate the Clinical Utility of Specific Autoantibody Testing in Patients With Interstitial Lung Disease
Study type: OBSERVATIONAL
Overall status: COMPLETED
Conditions: Interstitial Lung Disease
Keywords: interstitial lung disease
idiopathic pulmonary fibrosis
Lead sponsor: Singapore General Hospital
Sponsor class: OTHER
First posted: 2012-05-17
Enrollment: 20
Sex: ALL
Minimum age (years): 21
Maximum age (years): 90
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Observational model: CASE_ONLY
Time perspective: PROSPECTIVE
Sampling method: NON_PROBABILITY_SAMPLE
Study population: Patients with weak positive ANA (1:400 titre) and no overt connective tissue disease manifestations OR borderline/negative ANA with some clinical suggestion of connective tissue disease.

Brief summary: The purpose of this study is to evaluate the clinical utility of specific autoantibody testing in unmasking an underlying connective tissue disorder in patients who present with interstitial lung disease and found to have weak positive ANA (1:400 titre) with no overt connective tissue disease manifestations OR borderline/negative ANA with some clinical suggestion of connective tissue disease.

Detailed description: It has been well established that patients with connective tissue disease associated interstitial lung disease respond better to immunosuppressive therapy, and have a better outcome compared to patients with idiopathic interstitial pneumonias. This makes it imperative to identify this group of patients for management and prognostication. Unfortunately some of these patients do not demonstrate overt clinical manifestations of connective tissue disease and our current available autoantibody screen does not detect all potential autoantibodies present. We would like to test for specific autoantibodies in this group of patients to evaluate its clinical utility in identifying covert connective tissue diseases associated with interstitial lung disease.

Eligibility criteria: Inclusion Criteria:

1. Patients 21 years old and older
2. Patients with interstitial lung disease who have been found to have weak positive ANA (1:400 titre) with no overt connective tissue disease manifestations OR borderline/negative ANA with some clinical suggestion of connective tissue disease will be offered specific autoantibody testing

Exclusion Criteria:

1. Inability and unwillingness to sign informed consent
2. Patients who are pregnant or have underlying malignancy

Primary outcomes:
measure: Clinical utility of specific autoantibody testing
timeFrame: 3 months
Secondary outcomes:
Other outcomes:
Locations:
city: Singapore
country: Singapore
facility: Singapore General Hospital
Study officials:
affiliation: Singapore General Hospital
name: Su Ying Low, BMBCh
role: PRINCIPAL_INVESTIGATOR
References:
citation: de Lauretis A, Veeraraghavan S, Renzoni E. Review series: Aspects of interstitial lung disease: connective tissue disease-associated interstitial lung disease: how does it differ from IPF? How should the clinical approach differ? Chron Respir Dis. 2011;8(1):53-82. doi: 10.1177/1479972310393758.
citation: Friedman AW, Targoff IN, Arnett FC. Interstitial lung disease with autoantibodies against aminoacyl-tRNA synthetases in the absence of clinically apparent myositis. Semin Arthritis Rheum. 1996 Aug;26(1):459-67. doi: 10.1016/s0049-0172(96)80026-6.
citation: Corte TJ, Copley SJ, Desai SR, Zappala CJ, Hansell DM, Nicholson AG, Colby TV, Renzoni E, Maher TM, Wells AU. Significance of connective tissue disease features in idiopathic interstitial pneumonia. Eur Respir J. 2012 Mar;39(3):661-8. doi: 10.1183/09031936.00174910. Epub 2011 Sep 15.
citation: Fischer A, West SG, Swigris JJ, Brown KK, du Bois RM. Connective tissue disease-associated interstitial lung disease: a call for clarification. Chest. 2010 Aug;138(2):251-6. doi: 10.1378/chest.10-0194.