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Conserved Functions of Ikaros in Vertebrate Lymphocyte Development: Genetic Evidence for Distinct Larval and Adult Phases of T Cell Development and Two Lineages of B Cells in Zebrafish

MPG-Autoren

Shorpp,  Michael
Max Planck Society;

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Bialecki,  Mike
Department of Developmental Immunology, Max Planck Institute of Immunobiology and Epigenetics, Max Planck Society;

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Diekhoff,  Dagmar
Department of Developmental Immunology, Max Planck Institute of Immunobiology and Epigenetics, Max Planck Society;

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Walderich,  Brigitte
Department of Developmental Immunology, Max Planck Institute of Immunobiology and Epigenetics, Max Planck Society;

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Boehm,  Thomas
Department of Developmental Immunology, Max Planck Institute of Immunobiology and Epigenetics, Max Planck Society;

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Zitation

Shorpp, M., Bialecki, M., Diekhoff, D., Walderich, B., Odenthal, J., Maischein, H.-M., et al. (2006). Conserved Functions of Ikaros in Vertebrate Lymphocyte Development: Genetic Evidence for Distinct Larval and Adult Phases of T Cell Development and Two Lineages of B Cells in Zebrafish. The Journal of Immunology, 177, 2463-2476.


Zitierlink: https://hdl.handle.net/11858/00-001M-0000-002B-92B0-B
Zusammenfassung
Zebrafish has been advocated as an alternative animal model to study lymphocyte development, although the similarities in the genetic requirements of lymphopoiesis between fish and mammals have not yet been investigated. In this study, we examine the role of the transcription factor Ikaros in zebrafish lymphopoiesis. In fish larvae homozygous for an ikaros allele predicted to lack the C-terminal zinc fingers, T lymphopoiesis is absent; the presence of VHDμJμ rearrangements in adolescent fish is delayed in mutants. In adolescent mutant fish, T cells expressing tcrb and tcrd and B cells expressing igm are formed with low efficiency and display an oligoclonal Ag receptor repertoire. By contrast, B cells expressing the igz isotype do not develop, providing genetic evidence for two separate B cell lineages in zebrafish. Thus, Ikaros appears to play similar roles in fish and mammalian lymphopoiesis.