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Nat Immunol. 2003 Jan;4(1):49-54. Epub 2002 Dec 9.

Lethal T cell immunodeficiency induced by chronic costimulation via CD27-CD70 interactions.

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Laboratory for Experimental Immunology, Academic Medical Center, P.O. Box 22700, 1100DD Amsterdam, The Netherlands.

Erratum in

  • Nat Immunol. 2003 Mar;4(3):295.


It has been proposed that HIV-1, in addition to directly infecting and killing CD4+ T cells, causes T cell dysfunction and T cell loss by chronic immune activation. We analyzed the effects of chronic immune activation in mice that constitutively expressed CD70, the ligand for the tumor necrosis factor receptor family member CD27, on B cells. CD70 transgenic (CD70 Tg) mice showed a progressive conversion of naive T cells into effector-memory cells, which culminated in the depletion of naive T cells from lymph nodes and spleen. T cell changes depended on continuous CD27-CD70 interactions and T cell antigen receptor stimulation. Despite this hyperactive immune system, CD70 Tg mice died aged 6-8 months from Pneumocystis carinii infection, a hallmark of T cell immunodeficiency. Thus, persistent delivery of costimulatory signals via CD27-CD70 interactions, as may occur during chronic active viral infections, can exhaust the T cell pool and is sufficient to induce lethal immunodeficiency.

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