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Distribution of infectious endogenous retroviruses in mixed-breed and purebred cats

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Abstract

Endogenous retroviruses of domestic cats (ERV-DCs) are members of the genus Gammaretrovirus that infect domestic cats (Felis silvestris catus). Uniquely, domestic cats harbor replication-competent proviruses such as ERV-DC10 (ERV-DC18) and ERV-DC14 (xenotropic and nonecotropic viruses, respectively). The purpose of this study was to assess invasion by two distinct infectious ERV-DCs, ERV-DC10 and ERV-DC14, in domestic cats. Of a total sample of 1646 cats, 568 animals (34.5%) were positive for ERV-DC10 (heterozygous: 377; homozygous: 191), 68 animals (4.1%) were positive for ERV-DC14 (heterozygous: 67; homozygous: 1), and 10 animals (0.6%) were positive for both ERV-DC10 and ERV-DC14. ERV-DC10 and ERV-DC14 were detected in domestic cats in Japan as well as in Tanzania, Sri Lanka, Vietnam, South Korea and Spain. Breeding cats, including Singapura, Norwegian Forest and Ragdoll cats, showed high frequencies of ERV-DC10 (60–100%). By contrast, ERV-DC14 was detected at low frequency in breeding cats. Our results suggest that ERV-DC10 is widely distributed while ERV-DC14 is maintained in a minor population of cats. Thus, ERV-DC10 and ERV-DC14 have invaded cat populations independently.

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Acknowledgements

We thank Fermín Urra and Veterinary Clinic “Parque Bruil” for providing European domestic cat samples. We thank Edanz Group (http://www.edanzediting.com/ac) for editing a draft of this manuscript.

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This work was supported by the Japan Society for the Promotion of Science KAKENHI to K.N. (Grant Number 15H04602).

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Correspondence to Kazuo Nishigaki.

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Animal studies were conducted according to the guidelines for the care and use of laboratory animals of the Ministry of Education, Culture, Sports, Science, and Technology, Japan. All experiments were approved by the Genetic Modification Safety Committee of Yamaguchi University.

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Ngo, M.H., Soma, T., Youn, HY. et al. Distribution of infectious endogenous retroviruses in mixed-breed and purebred cats. Arch Virol 165, 157–167 (2020). https://doi.org/10.1007/s00705-019-04454-z

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