A lymphotoxin-IFN-beta axis essential for lymphocyte survival revealed during cytomegalovirus infection.

Published

Journal Article

The importance of lymphotoxin (LT) betaR (LTbetaR) as a regulator of lymphoid organogenesis is well established, but its role in host defense has yet to be fully defined. In this study, we report that mice deficient in LTbetaR signaling were highly susceptible to infection with murine CMV (MCMV) and early during infection exhibited a catastrophic loss of T and B lymphocytes, although the majority of lymphocytes were themselves not directly infected. Moreover, bone marrow chimeras revealed that lymphocyte survival required LTalpha expression by hemopoietic cells, independent of developmental defects in lymphoid tissue, whereas LTbetaR expression by both stromal and hemopoietic cells was needed to prevent apoptosis. The induction of IFN-beta was also severely impaired in MCMV-infected LTalpha(-/-) mice, but immunotherapy with an agonist LTbetaR Ab restored IFN-beta levels, prevented lymphocyte death, and enhanced the survival of these mice. IFN-alphabetaR(-/-) mice were also found to exhibit profound lymphocyte death during MCMV infection, thus providing a potential mechanistic link between type 1 IFN induction and lymphocyte survival through a LTalphabeta-dependent pathway important for MCMV host defense.

Full Text

Duke Authors

Cited Authors

  • Banks, TA; Rickert, S; Benedict, CA; Ma, L; Ko, M; Meier, J; Ha, W; Schneider, K; Granger, SW; Turovskaya, O; Elewaut, D; Otero, D; French, AR; Henry, SC; Hamilton, JD; Scheu, S; Pfeffer, K; Ware, CF

Published Date

  • June 1, 2005

Published In

Volume / Issue

  • 174 / 11

Start / End Page

  • 7217 - 7225

PubMed ID

  • 15905567

Pubmed Central ID

  • 15905567

International Standard Serial Number (ISSN)

  • 0022-1767

Digital Object Identifier (DOI)

  • 10.4049/jimmunol.174.11.7217

Language

  • eng

Conference Location

  • United States