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Tobin JM, Cooper MA. PTPN2 deficiency: Amping up JAK/STAT. J Exp Med 2024; 221:e20240980. [PMID: 39028870 PMCID: PMC11259788 DOI: 10.1084/jem.20240980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/21/2024] Open
Abstract
Identification of monogenic causes of immune dysregulation provides insight into human immune response and signaling pathways associated with autoimmunity. Here, Jeanpierre et al. (https://doi.org/10.1084/jem.20232337) identify new germline variants in the gene encoding PTPN2 associated with loss of regulatory function, enhanced JAK/STAT signaling, and early-onset autoimmunity.
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Affiliation(s)
- Joshua M. Tobin
- Division of Rheumatology/Immunology, Department of Pediatrics, Washington University in St. Louis, St. Louis, MO, USA
| | - Megan A. Cooper
- Division of Rheumatology/Immunology, Department of Pediatrics, Washington University in St. Louis, St. Louis, MO, USA
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Toth KA, Schmitt EG, Kolicheski A, Greenberg ZJ, Levendosky E, Saucier N, Trammel K, Oikonomou V, Lionakis MS, Klechevsky E, Kim BS, Schuettpelz LG, Saligrama N, Cooper MA. A human STAT3 gain-of-function variant drives local Th17 dysregulation and skin inflammation in mice. J Exp Med 2024; 221:e20232091. [PMID: 38861030 PMCID: PMC11167377 DOI: 10.1084/jem.20232091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 04/29/2024] [Accepted: 05/21/2024] [Indexed: 06/12/2024] Open
Abstract
Germline gain-of-function (GOF) variants in STAT3 cause an inborn error of immunity associated with early-onset poly-autoimmunity and immune dysregulation. To study tissue-specific immune dysregulation, we used a mouse model carrying a missense variant (p.G421R) that causes human disease. We observed spontaneous and imiquimod (IMQ)-induced skin inflammation associated with cell-intrinsic local Th17 responses in STAT3 GOF mice. CD4+ T cells were sufficient to drive skin inflammation and showed increased Il22 expression in expanded clones. Certain aspects of disease, including increased epidermal thickness, also required the presence of STAT3 GOF in epithelial cells. Treatment with a JAK inhibitor improved skin disease without affecting local Th17 recruitment and cytokine production. These findings collectively support the involvement of Th17 responses in the development of organ-specific immune dysregulation in STAT3 GOF and suggest that the presence of STAT3 GOF in tissues is important for disease and can be targeted with JAK inhibition.
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Affiliation(s)
- Kelsey A. Toth
- Department of Pediatrics, Division of Rheumatology, Washington University School of Medicine, St. Louis, MO, USA
| | - Erica G. Schmitt
- Department of Pediatrics, Division of Rheumatology, Washington University School of Medicine, St. Louis, MO, USA
| | - Ana Kolicheski
- Department of Pediatrics, Division of Rheumatology, Washington University School of Medicine, St. Louis, MO, USA
| | - Zev J. Greenberg
- Department of Pediatrics, Division of Hematology and Oncology, Washington University School of Medicine, St. Louis, MO, USA
| | - Elizabeth Levendosky
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
| | - Nermina Saucier
- Department of Pediatrics, Division of Rheumatology, Washington University School of Medicine, St. Louis, MO, USA
| | - Kelsey Trammel
- Department of Pediatrics, Division of Rheumatology, Washington University School of Medicine, St. Louis, MO, USA
| | - Vasileios Oikonomou
- Fungal Pathogenesis Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Michail S. Lionakis
- Fungal Pathogenesis Section, Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
| | - Eynav Klechevsky
- Department of Pathology and Immunology, Division of Immunobiology, Washington University School of Medicine, St. Louis, MO, USA
| | - Brian S. Kim
- Kimberly and Eric J. Waldman Department of Dermatology, Icahn School of Medicine at Mount Sinai, Precision Immunology Institute, Friedman Brain Institute, Mark Lebwohl Center for Neuroinflammation and Sensation, New York, NY, USA
- Allen Discovery Center for Neuroimmune Interactions, New York, NY, USA
| | - Laura G. Schuettpelz
- Department of Pediatrics, Division of Hematology and Oncology, Washington University School of Medicine, St. Louis, MO, USA
| | - Naresha Saligrama
- Department of Neurology, Washington University School of Medicine, St. Louis, MO, USA
- Department of Pathology and Immunology, Division of Immunobiology, Washington University School of Medicine, St. Louis, MO, USA
- Bursky Center for Human Immunology & Immunotherapy, Washington University School of Medicine, St. Louis, MO, USA
| | - Megan A. Cooper
- Department of Pediatrics, Division of Rheumatology, Washington University School of Medicine, St. Louis, MO, USA
- Department of Pathology and Immunology, Division of Immunobiology, Washington University School of Medicine, St. Louis, MO, USA
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Uzel G, Keller B, Warnatz K. Hypogammaglobulinemia and immune dysregulation-not just 2 sides of a coin. J Allergy Clin Immunol 2024; 153:90-92. [PMID: 37984800 DOI: 10.1016/j.jaci.2023.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Revised: 11/13/2023] [Accepted: 11/14/2023] [Indexed: 11/22/2023]
Affiliation(s)
- Gulbu Uzel
- Laboratory of Clinical Immunology and Microbiology, National Institute of Allergy and Infectious Diseases, Bethesda, Md
| | - Baerbel Keller
- Department of Rheumatology and Clinical Immunology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Klaus Warnatz
- Department of Rheumatology and Clinical Immunology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Center for Chronic Immunodeficiency, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany; Department of Immunology, University Hospital Zurich, Zurich, Switzerland.
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