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Gruber C, Martin-Fernandez M, Ailal F, Qiu X, Taft J, Altman J, Rosain J, Buta S, Bousfiha A, Casanova JL, Bustamante J, Bogunovic D. Homozygous STAT2 gain-of-function mutation by loss of USP18 activity in a patient with type I interferonopathy. J Exp Med 2020; 217:e20192319. [PMID: 32092142 PMCID: PMC7201920 DOI: 10.1084/jem.20192319] [Citation(s) in RCA: 68] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 01/13/2020] [Accepted: 02/07/2020] [Indexed: 12/21/2022] Open
Abstract
Type I interferonopathies are monogenic disorders characterized by enhanced type I interferon (IFN-I) cytokine activity. Inherited USP18 and ISG15 deficiencies underlie type I interferonopathies by preventing the regulation of late responses to IFN-I. Specifically, USP18, being stabilized by ISG15, sterically hinders JAK1 from binding to the IFNAR2 subunit of the IFN-I receptor. We report an infant who died of autoinflammation due to a homozygous missense mutation (R148Q) in STAT2. The variant is a gain of function (GOF) for induction of the late, but not early, response to IFN-I. Surprisingly, the mutation does not enhance the intrinsic activity of the STAT2-containing transcriptional complex responsible for IFN-I-stimulated gene induction. Rather, the STAT2 R148Q variant is a GOF because it fails to appropriately traffic USP18 to IFNAR2, thereby preventing USP18 from negatively regulating responses to IFN-I. Homozygosity for STAT2 R148Q represents a novel molecular and clinical phenocopy of inherited USP18 deficiency, which, together with inherited ISG15 deficiency, defines a group of type I interferonopathies characterized by an impaired regulation of late cellular responses to IFN-I.
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Affiliation(s)
- Conor Gruber
- Department of Microbiology, Icahn School of Medicine at Mt. Sinai, New York, NY
| | | | - Fatima Ailal
- Laboratory of Clinical Immunology, Inflammation and Allergy, Faculty of Medicine and Pharmacy of Casablanca, King Hassan II University, Casablanca, Morocco
- Clinical Immunology Unit, Department of Pediatric Infectious Diseases, Children's Hospital, Centre Hospitalier Universitaire Averroes, Casablanca, Morocco
| | - Xueer Qiu
- Department of Microbiology, Icahn School of Medicine at Mt. Sinai, New York, NY
| | - Justin Taft
- Department of Microbiology, Icahn School of Medicine at Mt. Sinai, New York, NY
| | - Jennie Altman
- Department of Microbiology, Icahn School of Medicine at Mt. Sinai, New York, NY
| | - Jérémie Rosain
- Paris University, Imagine Institute, Paris, France
- Laboratory of Human Genetics of Infectious Diseases, Institut National de la Santé et de la Recherche Médicale U1163, Necker Hospital for Sick Children, Paris, France
| | - Sofija Buta
- Department of Microbiology, Icahn School of Medicine at Mt. Sinai, New York, NY
| | - Aziz Bousfiha
- Laboratory of Clinical Immunology, Inflammation and Allergy, Faculty of Medicine and Pharmacy of Casablanca, King Hassan II University, Casablanca, Morocco
- Clinical Immunology Unit, Department of Pediatric Infectious Diseases, Children's Hospital, Centre Hospitalier Universitaire Averroes, Casablanca, Morocco
| | - Jean-Laurent Casanova
- Paris University, Imagine Institute, Paris, France
- Laboratory of Human Genetics of Infectious Diseases, Institut National de la Santé et de la Recherche Médicale U1163, Necker Hospital for Sick Children, Paris, France
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY
- Howard Hughes Medical Institute, New York, NY
- Pediatric Hematology and Immunology Unit, Necker Hospital for Sick Children, Assistance Publique–Hôpitaux de Paris, Paris, France
| | - Jacinta Bustamante
- Paris University, Imagine Institute, Paris, France
- Laboratory of Human Genetics of Infectious Diseases, Institut National de la Santé et de la Recherche Médicale U1163, Necker Hospital for Sick Children, Paris, France
- St. Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, The Rockefeller University, New York, NY
- Center for the Study of Primary Immunodeficiencies, Necker Hospital for Sick Children, Assistance Publique–Hôpitaux de Paris, Paris, France
| | - Dusan Bogunovic
- Department of Microbiology, Icahn School of Medicine at Mt. Sinai, New York, NY
- Department of Pediatrics, Icahn School of Medicine at Mt. Sinai, New York, NY
- Precision Immunology Institute, Icahn School of Medicine at Mt. Sinai, New York, NY
- Mindich Child Health and Development Institute, Icahn School of Medicine at Mt. Sinai, New York, NY
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