Peripheral blood B-cell death compensates for excessive proliferation in lymphoid tissues and maintains homeostasis in bovine leukemia virus-infected sheep.

Christophe DEBACQ, N. Gillet, B. Asquith, M.-T. Sanchez-Alcaraz, A.-F. Florins, Mathieu Boxus, I. Schwartz-Cornil, M. Bonneau, Grégori Jean, P. Kerkhofs, A. Thewis, R Kettmann, L. Willems, Jack B. Hay

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Résumé

[en] The size of a lymphocyte population is primarily determined by a dynamic equilibrium between cell proliferation and death. Hence, lymphocyte recirculation between the peripheral blood and lymphoid tissues is a key determinant in the maintenance of cell homeostasis. Insights into these mechanisms can be gathered from large-animal models, where lymphatic cannulation from individual lymph nodes is possible. In this study, we assessed in vivo lymphocyte trafficking in bovine leukemia virus (BLV)-infected sheep. With a carboxyfluorescein diacetate succinimidyl ester labeling technique, we demonstrate that the dynamics of lymphocyte recirculation is unaltered but that accelerated proliferation in the lymphoid tissues is compensated for by increased death in the peripheral blood cell population. Lymphocyte homeostasis is thus maintained by biphasic kinetics in two distinct tissues, emphasizing a very dynamic process during BLV infection.
langue originaleAnglais
Pages (de - à)9710-9719
Nombre de pages10
journalJournal of Virology
Volume80
Numéro de publication19
Les DOIs
Etat de la publicationPublié - 2006
Modification externeOui

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