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FDA Clears Thermo Scientific EliA RNA Pol III and EliA Rib-P Tests for Use in U.S.

New blood tests aid in diagnosing systemic sclerosis and systemic lupus erythematosus

PORTAGE, Mich.--(BUSINESS WIRE)--Thermo Scientific EliA RNA Pol III and EliA Rib-P tests have been cleared by the U.S. Food & Drug Administration (FDA) for aiding in the diagnosis of Systemic Sclerosis (SSc; scleroderma) and Systemic Lupus Erythematosus (SLE). With these new tests, the EliA portfolio provides a more robust clinical offering through a comprehensive menu of automated connective tissue disease tests.

“Autoimmune diseases can be a challenge to diagnose. Reliable and accurate laboratory tests that provide clinical clarity are essential tools for clinicians managing these patients,” said Dr. Henry Homburger, Professor Emeritus of Laboratory Medicine at Mayo Clinic College of Medicine, and laboratory director, Thermo Fisher Phadia Immunology Reference Laboratory. “The addition of RNA Polymerase III and Ribosomal P to the EliA connective tissue disease test menu will add considerable value to the diagnosis of SSc and SLE.”

RNA Polymerase III is a criteria marker for SSc with both diagnostic and prognostic value.[1, 2] Additionally, in patients who are positive for RNA Polymerase III, up to 70% may have no other SSc associated antibodies present.[2] The EliA RNA Pol III test completes a criteria based EliA SSc panel and is the first fully automated RNA Polymerase test available in the U.S.

A subset of SLE patients present with monospecific Ribosomal P antibodies.[3] Detection of these autoantibodies via indirect immunofluorescence has been shown to be an unreliable method, which if used solely, could result in delayed diagnosis and treatment.[4] The EliA Rib-P test is designed with optimal sensitivity and specificity and can be used to support the diagnosis of SLE, particularly in ANA negative patients. [3, 4]

“The availability of a strong CTD test menu on a fully automated instrument could improve the efficiency and productivity of diagnostic laboratories,” added Homburger. “The new EliA RNA Pol III and EliA Rib-P tests have been designed to improve the differentiation of SSc and SLE from other connective tissue diseases. Targeting existing diagnostic care gaps can potentially lead to earlier and more accurate diagnosis and ultimately improve clinical outcomes for patients.”

For more information on the Thermo Scientific EliA™ RNA Pol III and EliA Rib-P tests, please visit

About Thermo Fisher Scientific

Thermo Fisher Scientific Inc. is the world leader in serving science, with annual revenue of approximately $40 billion. Our Mission is to enable our customers to make the world healthier, cleaner and safer. Whether our customers are accelerating life sciences research, solving complex analytical challenges, increasing productivity in their laboratories, improving patient health through diagnostics or the development and manufacture of life-changing therapies, we are here to support them. Our global team delivers an unrivaled combination of innovative technologies, purchasing convenience and pharmaceutical services through our industry-leading brands, including Thermo Scientific, Applied Biosystems, Invitrogen, Fisher Scientific, Unity Lab Services, Patheon and PPD. For more information, please visit


1. Van Den Hoogen, F., et al., 2013 Classification Criteria for Systemic Sclerosis: An American College of Rheumatology/European League Against Rheumatism Collaborative Initiative. Arthritis & Rheumatism, 2013. 65(11): p. 2737-2747.

2. Wielosz, E., M. Dryglewska, and M. Majdan, Clinical consequences of the presence of anti-RNA Pol III antibodies in systemic sclerosis. Advances in Dermatology and Allergology, 2020. 37(6): p. 909-914.

3. Carmona-Fernandes, D., et al., Anti-ribosomal P protein IgG autoantibodies in patients with systemic lupus erythematosus: diagnostic performance and clinical profile. BMC Medicine, 2013. 11(1): p. 98.

4. Choi, M.Y., et al., A review and meta-analysis of anti-ribosomal P autoantibodies in systemic lupus erythematosus. Autoimmunity Reviews, 2020. 19(3): p. 102463.


Angela Christoforos, Greenough (for Thermo Fisher)
Phone: 508-801-2391

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Last Updated: 09-Jun-2022