Infection of bone marrow macrophages by equine infectious anemia virus.

The research investigates the infection of bone marrow-derived macrophages (BMDM) by the equine infectious anemia virus (EIAV), its impact on cell viability, and the induction of cytokines.

Method of Research

• BMDM were collected from the bone marrow of six healthy adult horses for this study.
• The BMDM cells were then infected with the EIAV at a multiplicity of infection of 8.
• Various metrics were then studied from culture supernatant samples taken at different times after infection. These statistics included:
  • Cell viability,
  • Percentage of cells with detectable viral protein,
  • Reverse transcriptase activity, and
  • Concentrations of infective virus (measured in focus-forming units per milliliter), interleukin 6, and tumor necrosis factor-alpha.

Results of Research

• Cell viability declined noticeably on the 4th day and was at its last on the 8th day.
• There was a significant increase in the number of cells revealing viral protein and amplified reverse transcriptase activity from the 4th day until the 6th day.
• The virus concentration peaked on the 4th day after infection and remained steady after this period.
• Infection with EIAV induced a significant rise in the production of interleukin 6 by BMDM, with the most noticeable difference observed on the 4th day.
• Tumor necrosis factor-alpha production remained negligible in both control and infected BMDM.

Conclusions of Research

• The BMDM cellular group is effective for studying the impact of EIAV infection, such as cell death and the induction of interleukin 6, while the work does not produce significant amounts of tumor necrosis factor-alpha.
• The research gives profound insights on how to contain and understand the infection rates of EIAV. It also provides valuable information about the behavior of the disease in regards to cell life and the production of interleukin 6.