ISSAID/EMQN Best Practice Guidelines for the Genetic Diagnosis of Monogenic Autoinflammatory Diseases in the Next-Generation Sequencing Era

Yael Shinar, Isabella Ceccherini, Dorota Rowczenio, Ivona Aksentijevich, Juan Arostegui, Eldad Ben-Chetrit, Guilaine Boursier, Marco Gattorno, Hasmik Hayrapetyan, Hiroaki Ida, Nobuo Kanazawa, Helen J. Lachmann, Anna Mensa-Vilaro, Ryuta Nishikomori, Christian Oberkanins, Laura Obici, Osamu Ohara, Seza Ozen, Tamara Sarkisian, Katie SheilsNicola Wolstenholme, Evelien Zonneveld-Huijssoon, Marielle E. van Gijn*, Isabelle Touitou

*Corresponding author for this work

    Research output: Contribution to journalArticleAcademicpeer-review

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    Abstract

    BACKGROUND: Monogenic autoinflammatory diseases are caused by pathogenic variants in genes that regulate innate immune responses, and are characterized by sterile systemic inflammatory episodes. Since symptoms can overlap within this rapidly expanding disease category, accurate genetic diagnosis is of the utmost importance to initiate early inflammation-targeted treatment and prevent clinically significant or life-threatening complications. Initial recommendations for the genetic diagnosis of autoinflammatory diseases were limited to a gene-by-gene diagnosis strategy based on the Sanger method, and restricted to the 4 prototypic recurrent fevers (MEFV, MVK, TNFRSFJA, and NLRP3 genes). The development of best practices guidelines integrating critical recent discoveries has become essential.

    METHODS: The preparatory steps included 2 online surveys and pathogenicity annotation of newly recommended genes. The current guidelines were drafted by European Molecular Genetics Quality Network members, then discussed by a panel of experts of the International Society for Systemic Autoinflammatory Diseases during a consensus meeting.

    RESULTS: In these guidelines, we combine the diagnostic strength of next-generation sequencing and recommendations to 4 more recently identified genes (ADA2, NOD2, PSTPIP1, and TNFAIP3), nonclassical pathogenic genetic alterations, and atypical phenotypes. We present a referral-based decision tree for test scope and method (Sanger versus next-generation sequencing) and recommend on complementary explorations for mosaicism, copy-number variants, and gene dose. A genotype table based on the 5-category variant pathogenicity classification provides the clinical significance of prototypic genotypes per gene and disease.

    CONCLUSIONS: These guidelines will orient and assist geneticists and health practitioners in providing up-to-date and appropriate diagnosis to their patients.

    Original languageEnglish
    Pages (from-to)525-536
    Number of pages12
    JournalClinical Chemistry
    Volume66
    Issue number4
    DOIs
    Publication statusPublished - 1-Apr-2020

    Keywords

    • FAMILIAL MEDITERRANEAN FEVER
    • SOMATIC MOSAICISM
    • CARD15 MUTATIONS
    • HAPLOINSUFFICIENCY
    • AMYLOIDOSIS
    • DELETION
    • PATIENT
    • VARIANT

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