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Related Experiment Videos

Antinuclear antibody testing.

David F Keren1

  • 1Warde Medical Laboratory, Department of Pathology, University of Michigan Medical School, Ann Arbor, MI 48108, USA. dfkeren@yahoo.com

Clinics in Laboratory Medicine
|July 24, 2002
PubMed
Summary
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The antinuclear antibody (ANA) test is a superior screening tool for connective tissue diseases compared to the LE cell preparation. Proper patient selection and test validation are crucial for accurate ANA test results in diagnosing SLE.

Area of Science:

  • Clinical immunology
  • Serological diagnostics
  • Rheumatology

Background:

  • The antinuclear antibody (ANA) test is a primary screening method for systemic lupus erythematosus (SLE) and other connective tissue diseases.
  • The LE cell preparation is a less preferred diagnostic assay due to its subjectivity and high cost.

Purpose of the Study:

  • To evaluate the efficacy of ANA testing versus LE cell preparations for diagnosing connective tissue diseases.
  • To provide recommendations for the optimal use of ANA screening tests in clinical practice.

Main Methods:

  • Review of existing literature on ANA testing (IFA and EIA) and LE cell preparations.
  • Analysis of the diagnostic performance, including negative predictive value, of ANA tests.
  • Consideration of automation and product variability in EIA ANA testing.

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Main Results:

  • ANA tests, particularly automated EIA methods, offer superior screening capabilities compared to LE cell preparations.
  • Laboratories must validate EIA ANA test products and establish appropriate cutoffs for their assays.
  • High negative predictive value of ANA tests is confirmed, emphasizing the importance of appropriate patient selection.

Conclusions:

  • The LE cell preparation assay should be discontinued due to the availability of superior ANA screening and specific autoantibody tests.
  • Effective patient selection, guided by criteria like the American College of Rheumatism criteria, is essential for maximizing the predictive value of positive ANA test results.
  • Laboratories need to carefully select and validate ANA screening test platforms based on clinical needs and assay performance.