Fatal autoimmunity results from the conditional deletion of Snai2 and Snai3.
Transcriptional regulation of gene expression is a key component of orchestrating proper immune cell development and function. One strategy for maintaining these transcriptional programs has been the evolution of transcription factor families with members possessing overlapping functions. Using the germ line deletion of Snai2 combined with the hematopoietic specific deletion of Snai3, we report that these factors function redundantly to preserve the development of B and T cells. Such animals display severe lymphopenia, alopecia and dermatitis as well as profound autoimmunity manifested by the production of high levels of autoantibodies as early as 3 weeks of age and die by 30 days after birth. Autoantibodies included both IgM and IgG isotypes and were reactive against cytoplasmic and membranous components. A regulatory T cell defect contributed to the autoimmune response in that adoptive transfer of wild type regulatory T cells alleviated symptoms of autoimmunity. Additionally, transplantation of Snai2/Snai3 double deficient bone marrow into Snai2 sufficient Rag2(-/-) recipients resulted in autoantibody generation. The results demonstrated that appropriate expression of Snai2 and Snai3 in cells of hematopoietic derivation plays an important role in development and maintenance of immune tolerance.
Division of Cell Biology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84132, United States. Electronic address: peter.pioli@path.utah.edu.
Peter D
PD
Pioli
Division of Cell Biology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84132, United States.
Xinjian
X
Chen
Division of Cell Biology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84132, United States.
Janis J
JJ
Weis
Division of Cell Biology and Immunology, Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT 84132, United States.
John H
JH
Weis
D016475:3T3 Cells; D000818:Animals; D001323:Autoantibodies / Q000276:immunology; D015551:Autoimmunity / Q000235:genetics / Q000276:immunology*; D001402:B-Lymphocytes / Q000276:immunology / Q000378:metabolism; D015153:Blotting, Western; D001854:Bone Marrow Cells / Q000276:immunology / Q000378:metabolism; D016026:Bone Marrow Transplantation; D051858:Forkhead Transcription Factors / Q000276:immunology / Q000378:metabolism; D017353:Gene Deletion; D015870:Gene Expression / Q000276:immunology; D007074:Immunoglobulin G / Q000276:immunology; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D008822:Mice, Transgenic; D008856:Microscopy, Fluorescence; D020133:Reverse Transcriptase Polymerase Chain Reaction; D000071250:Snail Family Transcription Factors; D013601:T-Lymphocytes / Q000276:immunology / Q000378:metabolism; D050378:T-Lymphocytes, Regulatory / Q000276:immunology / Q000378:metabolism; D014157:Transcription Factors / Q000172:deficiency / Q000235:genetics / Q000276:immunology*; D016335:Zinc Fingers / Q000235:genetics / Q000276:immunology*
D001323:Autoantibodies; D051858:Forkhead Transcription Factors; D007074:Immunoglobulin G; C000604449:Snai2 protein, mouse; C404767:Snai3 protein, mouse; D000071250:Snail Family Transcription Factors; D014157:Transcription Factors
Autoantibody; Autoimmunity; Genetic deficiency; Lymphocytes; Snail transcription factors