alexa Antiviral instruction of bone marrow leukocytes during respiratory viral infections.

Author(s): Hermesh T, Moltedo B, Moran TM, Lpez CB

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Abstract Respiratory viral infections trigger a robust inflammatory response in the lung, producing cytokines, chemokines, and growth factors that promote infiltration of effector leukocytes. Whereas the role of chemokines and infiltrating leukocytes in antiviral immunity is well studied, the effect that lung cytokines have on leukocytes in distal hematopoietic and lymphoid tissues and their role in antiviral immunity is unknown. We show that, during infection with influenza or Sendai virus, the lung communicates with the sterile bone marrow, the primary site of hematopoiesis, through type I interferons. While in the bone marrow, leukocytes exposed to type I interferons activate an antiviral transcriptional program and become resistant to infection with different viruses. The protected bone marrow leukocytes are capable of migrating to the infected lung and contribute to virus clearance. These findings show that appropriate instruction of cells during their development in the bone marrow is needed for effective control of infection. Copyright 2010 Elsevier Inc. All rights reserved.
This article was published in Cell Host Microbe and referenced in

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