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The env open reading frames of African lion (Panthera leo) lentivirus (feline immunodeficiency virus [FIV(Ple)]) subtypes B and E from geographically distinct regions of Africa suggest two distinct ancestries, with FIV(Ple)-E sharing a common ancestor with the domestic cat (Felis catus) lentivirus (FIV(Fca)). Here we demonstrate that FIV(Ple)-E and FIV(Fca) share the use of CD134 (OX40) and CXCR4 as a primary receptor and coreceptor, respectively, and that both lion CD134 and CXCR4 are functional receptors for FIV(Ple)-E. The shared usage of CD134 and CXCR4 by FIV(Fca) and FIV(Ple)-E may have implications for in vivo cell tropism and the pathogenicity of the E subtype among free-ranging lion populations.

journal of virology

Genetically Divergent Strains of Feline Immunodeficiency Virus from the Domestic Cat ( <i>Felis catus</i> ) and the African Lion ( <i>Panthera leo</i> ) Share Usage of CD134 and CXCR4 as Entry Receptors

Genetically Divergent Strains of Feline Immunodeficiency Virus from the Domestic Cat ( Felis catus ) and the African Lion ( Panthera leo ) Share Usage of CD134 and CXCR4 as Entry Receptors