Variable Clinical Phenotypes and Relation of Interferon Signature with Disease Activity in ADA2 Deficiency.

Insalaco, Antonella; Moneta, Gian Marco; Pardeo, Manuela; Caiello, Ivan; Messia, Virginia; Bracaglia, Claudia; Passarelli, Chiara; De Benedetti, Fabrizio · J Rheumatol · 2019

case_series · Level IV

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Abstract

An upregulation of type I interferon (IFN) stimulated genes [IFN score (IS)] was described in patients with adenosine deaminase 2 deficiency (DADA2). We describe the clinical course of 5 such patients and the role of IS as a marker of disease activity and severity. Expression levels of IS were determined by quantitative real-time PCR. Five white patients were identified as carrying <i>CECR1</i> mutations. The IS before treatment was elevated in 4 out of 5 patients and decreased after treatment. Our data confirm the high variability of DADA2 and suggest type I IS as a biomarker of disease activity.

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