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  • Title: Importance of the determination of enzymatic activity in the diagnosis of deficiency of adenosine deaminase 2 (DADA2).
    Author: Abbasi A, Batllori M, Gil-Sáez FJ, Rodríguez-Pintó I, Antón López J, Iglesias Jímenez E.
    Journal: Med Clin (Barc); 2022 Sep 23; 159(6):283-286. PubMed ID: 35241284.
    Abstract:
    OBJECTIVE: To describe the usefulness of determining the enzymatic activity of adenosine deaminase 2 (ADA2) in patients with suspected ADA2 deficiency (DADA2). METHOD: Retrospective multicenter study. Review with analysis of the clinical, biochemical and genetic data of the patients in whom the enzymatic activity of ADA2 has been determined by spectrophotometric method. RESULT: In 3 of the 20 patients, the diagnosis of DADA2 was confirmed by the combination of reduced enzyme activity and biallelic pathogenic variants in the CECR1 gene. In 2 patients with variants of uncertain significance in CECR1, the study of enzymatic activity allowed to rule out the disease. CONCLUSIONS: The reduced enzymatic detection of ADA2 confirms the diagnosis of DADA2, particularly important in carriers of variants of uncertain significance in CECR1.
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