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PMID: 11754817 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, P.H.S.

Mutation of E2F2 in mice causes enhanced T lymphocyte proliferation, leading to the development of autoimmunity.

Immunity ·Vol. 15 ·No. 6 ·2001-12-00 ·Pages 959-70

Murga M, Fernández-Capetillo O, Field SJ, Moreno B, Borlado LR, Fujiwara Y, Balomenos D, Vicario A, Carrera AC, Orkin SH, Greenberg ME, Zubiaga AM

Abstract

E2Fs are important regulators of proliferation, differentiation, and apoptosis. Here we characterize the phenotype of mice deficient in E2F2. We show that E2F2 is required for immunologic self-tolerance. E2F2(-/-) mice develop late-onset autoimmune features, characterized by widespread inflammatory infiltrates, glomerular immunocomplex deposition, and anti-nuclear antibodies. E2F2-deficient T lymphocytes exhibit enhanced TCR-stimulated proliferation and a lower activation threshold, leading to the accumulation of a population of autoreactive effector/memory T lymphocytes, which appear to be responsible for causing autoimmunity in E2F2-deficient mice. Finally, we provide support for a model to explain E2F2's unexpected role as a suppressor of T lymphocyte proliferation. Rather than functioning as a transcriptional activator, E2F2 appears to function as a transcriptional repressor of genes required for normal S phase entry, particularly E2F1.

MeSH Terms
Animals Apoptosis Autoimmune Diseases/genetics,immunology,pathology Autoimmunity/genetics,immunology Cell Cycle Proteins Cell Division Chimera Clonal Deletion DNA-Binding Proteins E2F Transcription Factors E2F1 Transcription Factor E2F2 Transcription Factor Gene Expression Regulation/immunology Glomerulonephritis, Membranoproliferative/genetics,immunology H-Y Antigen/genetics,immunology Humans Immunologic Memory Inflammation Jurkat Cells Lymphocyte Activation Male Mice Mice, Inbred BALB C Mice, Inbred C57BL Mice, Knockout Mutagenesis, Site-Directed Receptors, Antigen, T-Cell/immunology Recombinant Fusion Proteins/immunology Repressor Proteins/genetics,physiology S Phase/genetics Self Tolerance/genetics,immunology Splenomegaly/genetics,immunology T-Lymphocytes/cytology,immunology,pathology Thymus Gland/immunology,pathology Transcription Factors/biosynthesis,deficiency,genetics,physiology Transfection
Chemicals
Cell Cycle Proteins DNA-Binding Proteins E2F Transcription Factors E2F1 Transcription Factor E2F1 protein, human E2F2 Transcription Factor E2F2 protein, human E2f1 protein, mouse H-Y Antigen Receptors, Antigen, T-Cell Recombinant Fusion Proteins Repressor Proteins Transcription Factors
Authors & Affiliations
12 authors, click to expand affiliations / ORCID
Murga M
Department of Animal Biology and Genetics, Faculty of Sciences, University of the Basque Country, Bilbao, E-48080, Spain.
Fernández-Capetillo O
Field S J
Moreno B
Borlado L R
Fujiwara Y
Balomenos D
Vicario A
Carrera A C
Orkin S H
Greenberg M E
Zubiaga A M
Article Info
Journal
Immunity
Abbr.
Immunity
ISSN
1074-7613
Published
2001-12-00
Pages
959-70
Language
English
Region
United States
NLM ID
9432918
Subset
IM
Grants
NCI NIH HHS · CA43855 · United States
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