The detection of mature T- and B-cells during development of the lymphoid tissues of the tammar wallaby (Macropus eugenii)

Julie M. Old, Elizabeth M. Deane

    Research output: Contribution to journalArticle

    35 Citations (Scopus)

    Abstract

    The distribution of T- and B-cells in the developing lymphoid and immunohaematopoietic tissues of the tammar wallaby were investigated using antibodies to the mature cell surface markers, CD3, CD5 and CD79b. In the thymus, CD3- and CD5-positive T-cells were first observed at day 12 postpartum whilst rare B-cells were first detected at day 23. Both T- and B-lymphocytes were first stained on day 21 postpartum in the spleen and day 24 in lymph nodes. In one sample from a 7-day-old animal, rare CD79b-positive (CD79b +) lymphocytes were observed in the gut-associated lymphoid tissues. However, CD3 + cells were not apparent until day 12 and CD5 + cells were not detected until day 74 postpartum. No lymphocytes were detected in liver or bone marrow samples and no bronchus-associated lymphoid tissues were observed. The pattern of development and the distribution of T- and B-cells in the lymphoid and immunohaematopoietic tissues were similar to those observed in eutherian mammals and in limited studies of other metatherians. However, the detection of apparently mature T- and B-cells in the thymus and gut-associated lymphoid tissues (GALT) at the same postnatal age highlights the need for a more substantial study of the development of GALT. This is, at present, limited by availability of marsupial-specific antibodies.

    Original languageEnglish
    Pages (from-to)123-131
    Number of pages9
    JournalJournal of Anatomy
    Volume203
    Issue number1
    DOIs
    Publication statusPublished - 2003

    Keywords

    • B-cells
    • T-cells
    • development
    • immune system
    • marsupials
    • Marsupials
    • Development
    • Immune system

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