Equine infectious anemia virus derived from a molecular clone persistently infects horses.
Abstract: A full-length molecular clone of equine infectious anemia virus (EIAV) was isolated from a persistently infected canine fetal thymus cell line (Cf2Th). Upon transfection of equine dermis cells, the clone, designated CL22, yielded infectious EIAV particles (CL22-V) that replicated in vitro in both Cf2Th cells and an equine dermis cell strain. Horses infected with CL22-V developed an antibody response to viral proteins and possessed viral DNA in peripheral blood mononuclear cells, as determined by polymerase chain reaction assays. In addition, horses infected with CL22-V became persistently infected and were capable of transmitting the infection by transfer of whole blood to uninfected horses. However, CL22-V, like the parental canine cell-adapted virus, did not cause clinical signs in infected horses. Reverse transcriptase assays of CL22-V- and virulent EIAV-infected equine mononuclear cell cultures indicated that the lack of virulence of CL22-V was not due to an inability to infect and replicate in equine mononuclear cells in vitro.
Publication Date: 1990-12-01 PubMed ID: 2173767PubMed Central: PMC248720DOI: 10.1128/JVI.64.12.5750-5756.1990Google Scholar: Lookup The Equine Research Bank provides access to a large database of publicly available scientific literature. Inclusion in the Research Bank does not imply endorsement of study methods or findings by Mad Barn.
- Journal Article
- Research Support
- Non-U.S. Gov't
- Research Support
- U.S. Gov't
- P.H.S.
Summary
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This research article primarily discusses the successful replication of Equine Infectious Anemia Virus (EIAV) through a full-length molecular clone isolated from the Cf2Th cell line, and its subsequent ability to cause persistent infection in horses without generating any clinical signs of the disease.
Isolation and Transfection of EIAV Molecular Clone
- The researchers managed to isolate a full-length molecular clone of EIAV from a persistently infected canine fetal thymus (Cf2Th) cell line. The clone was named CL22.
- The CL22 clone was then transfected into equine dermis cells, where it produced infectious EIAV particles, referred to as CL22-V.
- The study confirmed that CL22-V can replicate in vitro, both in Cf2Th cells and an equine dermis cell strain.
Infection and Transmission in Horses
- Horses infected with CL22-V developed an antibody response, and viral DNA was detected in their peripheral blood mononuclear cells through polymerase chain reaction assays.
- The infected horses became persistently infected with EIAV and were capable of transmitting the infection to other, uninfected horses through the transfer of whole blood.
- Notably, the researchers observed that, similar to the original canine cell-adapted virus, CL22-V did not cause any clinical signs in infected horses, meaning the infection was asymptomatic.
Assessment of Virulence
- The lack of clinical signs in horses infected with CL22-V was not due to its inability to infect and replicate in equine mononuclear cells in vitro.
- To confirm this, reverse transcriptase assays were performed on CL22-V and virulent EIAV-infected equine mononuclear cell cultures, which indicated that the clone was capable of replicating within these cells.
- Therefore, the asymptomatic nature of the CL22-V infection may be a unique trait, and not due to a lack of virulence or replication capacity.
Cite This Article
APA
Whetter L, Archambault D, Perry S, Gazit A, Coggins L, Yaniv A, Clabough D, Dahlberg J, Fuller F, Tronick S.
(1990).
Equine infectious anemia virus derived from a molecular clone persistently infects horses.
J Virol, 64(12), 5750-5756.
https://doi.org/10.1128/JVI.64.12.5750-5756.1990 Publication
Researcher Affiliations
- Department of Microbiology, Pathology & Parasitology, North Carolina State University, College of Veterinary Medicine, Raleigh 27606.
MeSH Terms
- Animals
- Base Sequence
- Cells, Cultured
- Cloning, Molecular
- Equine Infectious Anemia / microbiology
- Genes, Viral
- Horses / microbiology
- Infectious Anemia Virus, Equine / genetics
- Infectious Anemia Virus, Equine / isolation & purification
- Infectious Anemia Virus, Equine / physiology
- Molecular Sequence Data
- Polymerase Chain Reaction
- Proviruses / genetics
- Proviruses / isolation & purification
- Skin
- Transfection
- Virus Replication
Grant Funding
- R01-AI24904 / NIAID NIH HHS
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Citations
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