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Morrish E, Wartewig T, Kratzert A, Rosenbaum M, Steiger K, Ruland J. The fusion oncogene VAV1-MYO1F triggers aberrant T-cell receptor signaling in vivo and drives peripheral T-cell lymphoma in mice. Eur J Immunol 2023; 53:e2250147. [PMID: 36541400 DOI: 10.1002/eji.202250147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 12/15/2022] [Accepted: 12/20/2022] [Indexed: 12/24/2022]
Abstract
VAV1-MYO1F is a recently identified gain-of-function fusion protein of the proto-oncogene Vav guanine nucleotide exchange factor 1 (VAV1) that is recurrently detected in T-cell non-Hodgkin's lymphoma (T-NHL) patients. However, the pathophysiological functions of VAV1-MYO1F in lymphomagenesis are insufficiently defined. Therefore, we generated transgenic mouse models to conditionally express VAV1-MYO1F in T-cells in vivo. We demonstrate that VAV1-MYO1F triggers cell autonomous activation of T-cell signaling with an activation of the ERK, JNK, and AKT pathways. VAV1-MYO1F expression induces a T-cell activation phenotype with high surface expression of CD25, ICOS, CD44, PD-1, and decreased CD62L as well as aberrant T-cell differentiation, proliferation, and neoplastic transformation. Consequently, the VAV1-MYO1F expressing T-cells induce a malignant T lymphoproliferative disease with 100% penetrance in vivo that mimics key aspects of human peripheral T-cell lymphoma. These results demonstrate that the human T-cell oncogene VAV1-MYO1F is sufficient to trigger oncogenic T-cell signaling and neoplastic transformation, and moreover, it provides a new clinically relevant mouse model to explore the pathogenesis of and treatment concepts for human T-cell lymphoma.
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Affiliation(s)
- Emma Morrish
- Institute of Clinical Chemistry and Pathobiochemistry, School of Medicine, Technical University of Munich, Munich, Germany
- Center for Translational Cancer Research (TranslaTUM), Technical University of Munich, Munich, Germany
- German Cancer Consortium (DKTK), partner site Munich, Munich, Germany
| | - Tim Wartewig
- Institute of Clinical Chemistry and Pathobiochemistry, School of Medicine, Technical University of Munich, Munich, Germany
- Center for Translational Cancer Research (TranslaTUM), Technical University of Munich, Munich, Germany
- Center of Molecular and Cellular Oncology, Yale School of Medicine, Yale University, New Haven, CT, USA
| | - Andreas Kratzert
- Institute of Clinical Chemistry and Pathobiochemistry, School of Medicine, Technical University of Munich, Munich, Germany
- Center for Translational Cancer Research (TranslaTUM), Technical University of Munich, Munich, Germany
| | - Marc Rosenbaum
- Institute of Clinical Chemistry and Pathobiochemistry, School of Medicine, Technical University of Munich, Munich, Germany
- Center for Translational Cancer Research (TranslaTUM), Technical University of Munich, Munich, Germany
| | - Katja Steiger
- German Cancer Consortium (DKTK), partner site Munich, Munich, Germany
- Comparative Experimental Pathology, Institute of Pathology, TUM School of Medicine, Technical University of Munich, Munich, Germany
| | - Jürgen Ruland
- Institute of Clinical Chemistry and Pathobiochemistry, School of Medicine, Technical University of Munich, Munich, Germany
- Center for Translational Cancer Research (TranslaTUM), Technical University of Munich, Munich, Germany
- German Cancer Consortium (DKTK), partner site Munich, Munich, Germany
- German Center for Infection Research (DZIF), partner site Munich, Munich, Germany
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Bilate AM, Bousbaine D, Mesin L, Agudelo M, Leube J, Kratzert A, Dougan SK, Victora GD, Ploegh HL. Tissue-specific emergence of regulatory and intraepithelial T cells from a clonal T cell precursor. Sci Immunol 2016; 1:eaaf7471. [PMID: 28783695 DOI: 10.1126/sciimmunol.aaf7471] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 07/22/2016] [Indexed: 12/19/2022]
Abstract
Peripheral Foxp3+ regulatory T cells (pTregs) maintain immune homeostasis by controlling potentially harmful effector T cell responses toward dietary and microbial antigens. Although the identity of the T cell receptor (TCR) can impose commitment and functional specialization of T cells, less is known about how TCR identity governs pTreg development from conventional CD4+ T cells. To investigate the extent to which TCR identity dictates pTreg fate, we used somatic cell nuclear transfer to generate a transnuclear (TN) mouse carrying a monoclonal TCR from a pTreg (pTreg TN mice). We found that the pTreg TCR did not inevitably predispose T cells to become pTreg but instead allowed for differentiation of noninflammatory CD4+CD8αα+ intraepithelial lymphocytes (CD4IELs) in the small intestine. Only when we limited the number of T cell precursors that carried the TN pTreg TCR did we observe substantial pTreg development in the mesenteric lymph nodes and small intestine lamina propria of mixed bone marrow chimeras. Small clonal sizes and therefore decreased intraclonal competition were required for pTreg development. Despite bearing the same TCR, small intestine CD4IEL developed independently of precursor frequency. Both pTreg and CD4IEL development strictly depended on the resident microbiota. A single clonal CD4+ T cell precursor can thus give rise to two functionally distinct and anatomically segregated T cell subsets in a microbiota-dependent manner. Therefore, plasticity of the CD4 T cell compartment depends not only on the microbiota but also on specialized environmental cues provided by different tissues.
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Affiliation(s)
- Angelina M Bilate
- Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
| | - Djenet Bousbaine
- Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Cambridge, MA 02142, USA.,Department of Biology, Microbiology Graduate Program, Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Luka Mesin
- Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Marianna Agudelo
- Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Justin Leube
- Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Andreas Kratzert
- Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Stephanie K Dougan
- Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Gabriel D Victora
- Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Hidde L Ploegh
- Whitehead Institute for Biomedical Research and Massachusetts Institute of Technology, Cambridge, MA 02142, USA.
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