Skip to Main content Skip to Navigation
New interface
Journal articles

Type I IFN controls chikungunya virus via its action on nonhematopoietic cells.

Abstract : Chikungunya virus (CHIKV) is the causative agent of an outbreak that began in La Réunion in 2005 and remains a major public health concern in India, Southeast Asia, and southern Europe. CHIKV is transmitted to humans by mosquitoes and the associated disease is characterized by fever, myalgia, arthralgia, and rash. As viral load in infected patients declines before the appearance of neutralizing antibodies, we studied the role of type I interferon (IFN) in CHIKV pathogenesis. Based on human studies and mouse experimentation, we show that CHIKV does not directly stimulate type I IFN production in immune cells. Instead, infected nonhematopoietic cells sense viral RNA in a Cardif-dependent manner and participate in the control of infection through their production of type I IFNs. Although the Cardif signaling pathway contributes to the immune response, we also find evidence for a MyD88-dependent sensor that is critical for preventing viral dissemination. Moreover, we demonstrate that IFN-alpha/beta receptor (IFNAR) expression is required in the periphery but not on immune cells, as IFNAR(-/-)-->WT bone marrow chimeras are capable of clearing the infection, whereas WT-->IFNAR(-/-) chimeras succumb. This study defines an essential role for type I IFN, produced via cooperation between multiple host sensors and acting directly on nonhematopoietic cells, in the control of CHIKV.
Document type :
Journal articles
Complete list of metadata

Cited literature [57 references]  Display  Hide  Download
Contributor : Mireille Gau Connect in order to contact the contributor
Submitted on : Thursday, August 19, 2010 - 7:00:05 AM
Last modification on : Thursday, October 20, 2022 - 3:10:07 PM
Long-term archiving on: : Saturday, November 20, 2010 - 2:26:14 AM


Publisher files allowed on an open archive




Clémentine Schilte, Thérèse Couderc, Fabrice Chretien, Marion Sourisseau, Nicolas Gangneux, et al.. Type I IFN controls chikungunya virus via its action on nonhematopoietic cells.. Journal of Experimental Medicine, 2010, 207 (2), pp.429-42. ⟨10.1084/jem.20090851⟩. ⟨pasteur-00458108⟩



Record views


Files downloads