A germline STAT6 gain-of-function variant is associated with early-onset allergies

Narissara Suratannon, Chupong Ittiwut, Willem A. Dik, Rungnapa Ittiwut, Kornvalee Meesilpavikkai, Nipan Israsena, Praewphan Ingrungruanglert, Virgil A.S.H. Dalm, Paul L.A. van Daele, Anapat Sanpavat, Nataruks Chaijitraruch, Benjamin Schrijver, Supranee Buranapraditkun, Thantrira Porntaveetus, Sigrid M.A. Swagemakers, Hanna IJspeert, Tanapat Palaga, Kanya Suphapeetiporn, Peter J. van der Spek, Nattiya HirankarnPantipa Chatchatee*, P. Martin van Hagen*, Vorasuk Shotelersuk*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

19 Citations (Scopus)

Abstract

Background: The signal transducer and activator of transcription 6 (STAT6) signaling pathway plays a central role in allergic inflammation. To date, however, there have been no descriptions of STAT6 gain-of-function variants leading to allergies in humans. Objective: We report a STAT6 gain-of-function variant associated with early-onset multiorgan allergies in a family with 3 affected members. Methods: Exome sequencing and immunophenotyping of T-helper cell subsets were conducted. The function of the STAT6 protein was analyzed by Western blot, immunofluorescence, electrophoretic mobility shift assays, and luciferase assays. Gastric organoids obtained from the index patient were used to study downstream effector cytokines. Results: We identified a heterozygous missense variant (c.1129G>A;p.Glu377Lys) in the DNA binding domain of STAT6 that was de novo in the index patient's father and was inherited by 2 of his 3 children. Severe atopic dermatitis and food allergy were key presentations. Clinical heterogeneity was observed among the affected individuals. Higher levels of peripheral blood TH2 lymphocytes were detected. The mutant STAT6 displayed a strong preference for nuclear localization, increased DNA binding affinity, and spontaneous transcriptional activity. Moreover, gastric organoids showed constitutive activation of STAT6 downstream signaling molecules. Conclusions: A germline STAT6 gain-of-function variant results in spontaneous activation of the STAT6 signaling pathway and is associated with an early-onset and severe allergic phenotype in humans. These observations enhance our knowledge of the molecular mechanisms underlying allergic diseases and will potentially contribute to novel therapeutic interventions.

Original languageEnglish
Pages (from-to)565-571.e9
JournalJournal of Allergy and Clinical Immunology
Volume151
Issue number2
DOIs
Publication statusPublished - Feb 2023

Bibliographical note

Funding Information:
Supported by the Thailand Science Research and Innovation Fund Chulalongkorn University, Thailand (CU_FRB65_hea (35)_042_30_23, HEA663200060), Ratchadapiseksompotch Fund, Faculty of Medicine, Chulalongkorn University, Thailand (RA56/009), Health Systems Research Institute, Thailand (65-039, 65-040), National Research Council of Thailand, Thailand (NRCT) (N42A650229), internal grant from Department of Internal Medicine, Erasmus University Medical Center Rotterdam, Netherlands. P. J. van der Spek and S.M.A. Swagemakers received funding from the Horizon 2020 program ImmunAID, EU, for bioinformatics services (779295).

Publisher Copyright:
© 2022 American Academy of Allergy, Asthma & Immunology

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