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J. Exp. Med.,
Volume 188, Number 3, August 3, 1998 451-463
By



From the * Basel Institute for Immunology, CH-4005, Basel, Switzerland; and the Genes were isolated using the suppression subtractive hybridization method by stimulation of
pro/pre B cells with anti-CD40 and interleukin (IL)-4 to mature Sµ-S
Department of
Applied Cell and Molecular Biology, Division of Tumour Biology, Umeå University,
901 87 Umeå, Sweden
-switched cells. One of the strongly upregulated genes encodes a novel murine CC chemokine we have named
ABCD-1. The ABCD-1 gene has three exons separated by 1.2- and 2.7-kb introns. It gives
rise to a 2.2-kb transcript containing an open reading frame of 276 nucleotides. Two polyadenylation sites are used, giving rise to cDNAs with either 1550 or 1850 bp of 3' untranslated regions. The open reading frame encodes a 24 amino acid-long leader peptide and a 68 amino
acid-long mature protein with a predicted molecular mass of 7.8 kD. ABCD-1 mRNA is
found in highest quantities in activated splenic B lymphocytes and dendritic cells. Little
chemokine mRNA is present in lung, in unstimulated splenic cells, in thymocytes, and in
lymph node cells. No ABCD-1 mRNA is detected in bone marrow, liver, kidney, or brain, in
peritoneal exudate cells as well as in the majority of all unstimulated B lineage cells tested. It is
also undetectable in Concanavalin A-activated/IL-2-restimulated splenic T cells, and in bone
marrow-derived IL-2-induced natural killer cells and IL-3-activated macrophages. Recombinant ABCD-1 revealed a concentration-dependent and specific migration of activated splenic
T lymphoblasts in chemotaxis assays. FACS® analyses of migrated cells showed no preferential
difference in migration of CD4+ versus CD8+ T cell blasts. Murine as well as human T cells responded to ABCD-1. Freshly isolated cells from bone marrow, thymus, spleen, and lymph node, IL-2-activated NK cells, and LPS-stimulated splenic cells, all did not show any chemotactic response. Thus, ABCD-1 is the first chemokine produced in large amounts by activated
B cells and acting selectively on activated T lymphocytes. Therefore, ABCD-1 is expected to
play an important role in the collaboration of dendritic cells and B lymphocytes with T cells in
immune responses.
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