Mouse APOBEC3 restricts friend leukemia virus infection and pathogenesis in vivo.
Several members of the apolipoprotein B mRNA-editing enzyme catalytic polypeptide-like complex 3 (APOBEC3) family in primates act as potent inhibitors of retroviral replication. However, lentiviruses have evolved mechanisms to specifically evade host APOBEC3. Likewise, murine leukemia viruses (MuLV) exclude mouse APOBEC3 from the virions and cleave virion-incorporated APOBEC3. Although the betaretrovirus mouse mammary tumor virus has been shown to be susceptible to mouse APOBEC3, it is not known if APOBEC3 has a physiological role in restricting more widely distributed and long-coevolved mouse gammaretroviruses. The pathogenicity of Friend MuLV (F-MuLV) is influenced by several host genes: some directly restrict the cell entry or integration of the virus, while others influence the host immune responses. Among the latter, the Rfv3 gene has been mapped to chromosome 15 in the vicinity of the APOBEC3 locus. Here we have shown that polymorphisms at the mouse APOBEC3 locus indeed influence F-MuLV replication and pathogenesis: the APOBEC3 alleles of F-MuLV-resistant C57BL/6 and -susceptible BALB/c mice differ in their sequences and expression levels in the hematopoietic tissues and in their abilities to restrict F-MuLV replication both in vitro and in vivo. Furthermore, upon infection with the pathogenic Friend virus complex, (BALB/c x C57BL/6)F(1) mice displayed an exacerbated erythroid cell proliferation when the mice carried a targeted disruption of the C57BL/6-derived APOBEC3 allele. These results indicate, for the first time, that mouse APOBEC3 is a physiologically functioning restriction factor to mouse gammaretroviruses.
Takeda
Eri
E
Department of Immunology, Kinki University School of Medicine, 377-2 Ohno-Higashi, Osaka-Sayama, Osaka 589-8511, Japan. masaaki@med.kindai.ac.jp
Tsuji-Kawahara
Sachiyo
S
Sakamoto
Mayumi
M
Langlois
Marc-André
MA
Neuberger
Michael S
MS
Rada
Cristina
C
Miyazawa
Masaaki
M
D000595:Amino Acid Sequence; D000818:Animals; D002460:Cell Line; D003564:Cytidine Deaminase / Q000235:genetics* / Q000276:immunology*; D004198:Disease Susceptibility; D005260:Female; D005622:Friend murine leukemia virus / Q000276:immunology* / Q000472:pathogenicity*; D020869:Gene Expression Profiling; D007942:Leukemia, Experimental / Q000276:immunology; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008810:Mice, Inbred C57BL; D008969:Molecular Sequence Data; D016254:Mutagenesis, Insertional; D011110:Polymorphism, Genetic; D012192:Retroviridae Infections / Q000276:immunology; D016415:Sequence Alignment; D014412:Tumor Virus Infections / Q000276:immunology; D014779:Virus Replication / Q000276:immunology
C503504:Apobec3 protein, mouse; D003564:Cytidine Deaminase
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