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Comparative evaluation of CC chemokine-induced migration of murine CD8alpha+ and CD8alpha- dendritic cells and their in vivo trafficking.

Abstract：

:Murine CD11c(+)CD8alpha(-) and CD11c(+)CD8alpha(+) dendritic cells (DCs) differentially regulate T cell responses. Although specific chemokines that recruit immature (i) or mature (m) CD8alpha(-) DCs have been identified, little is known about the influence of chemokines on CD8alpha(+) DCs. iDCs and mDCs isolated from spleens of fms-like tyrosine kinase 3 ligand-treated B10 mice were compared directly for migratory responses to a panel of CC chemokines or following local or systemic administration. In vitro assays were performed using Transwell(R) chambers. iDCs did not respond to any CC chemokines tested. Both subsets of mDCs migrated to CCL19 and CCL21, with consistently lower percentages of CD8alpha(+) DCs migrating. Chemokine receptor mRNA and protein expression were analyzed, but no correlation between expression and function was demonstrated. In vivo trafficking of fluorochrome-labeled DCs (B10; H2(b)) was assessed by immunohistochemistry and by rare-event flow cytometric analysis of allogeneic recipient (BALB/c; H2(d)) draining lymph node (DLN) and spleen cells. Twenty-four hours after intravenous injection, chloromethylfluorescein diacetate-positive CD8alpha(+) and CD8alpha(-) mDCs were detected by immunohistochemistry in spleens in similar numbers (that decreased over time). Following subcutaneous injection, both DC subsets were detected in DLN at 24 h, but only CD8alpha(-) DCs were evident by flow analysis at 48 h. Although CD8alpha(+) DCs migrate from peripheral tissues to T cell areas of (allogeneic) secondary lymphoid organs, they appear to mobilize as mDCs and less efficiently than CD8alpha(-) mDCs.

journal_name

J Leukoc Biol

journal_title

Journal of leukocyte biology

authors

Colvin BL,Morelli AE,Logar AJ,Lau AH,Thomson AW

doi

10.1189/jlb.1202613

subject

Has Abstract

pub_date

2004-02-01 00:00:00

pages

275-85

issue

2

eissn

0741-5400

issn

1938-3673

pii

jlb.1202613

journal_volume

75

pub_type

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