CD69+ memory T lymphocytes of the bone marrow and spleen express the signature transcripts of tissue‐resident memory T lymphocytes

F Siracusa, P Durek, MA McGrath… - European Journal of …, 2019 - Wiley Online Library
F Siracusa, P Durek, MA McGrath, Ö Sercan‐Alp, A Rao, W Du, C Cendón, HD Chang
European Journal of Immunology, 2019Wiley Online Library
It is a matter of current debate whether the bone marrow is a hub for circulating memory T
lymphocytes and/or the home of resident memory T lymphocytes. Here we demonstrate for
CD69+ murine CD8+, and CD69+ murine and human CD4+ memory T lymphocytes of the
bone marrow, making up between 30 and 60% of bone marrow memory T lymphocytes, that
they express the gene expression signature of tissue‐resident memory T lymphocytes. This
suggests that a substantial proportion of bone marrow memory T lymphocytes are resident. It …
Abstract
It is a matter of current debate whether the bone marrow is a hub for circulating memory T lymphocytes and/or the home of resident memory T lymphocytes. Here we demonstrate for CD69+ murine CD8+, and CD69+ murine and human CD4+ memory T lymphocytes of the bone marrow, making up between 30 and 60% of bone marrow memory T lymphocytes, that they express the gene expression signature of tissue‐resident memory T lymphocytes. This suggests that a substantial proportion of bone marrow memory T lymphocytes are resident. It adds to previous evidence that bone marrow memory T cells are resting in terms of mobility and proliferation, and maintain exclusive long‐term memory to distinct, systemic antigens.
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