Antigenic stimulation of T lymphocytes in chronic nononcogenic retrovirus infection: equine infectious anemia.
Abstract: Equine infectious anemia is a chronic disease of horses caused by a nononcogenic retrovirus. Studies were undertaken to determine the types of cells involved in the in vitro lymphoproliferative response to viral antigens and the dynamics of this reaction. It was observed that reactive lymphocytes were present at unpredictable times in the peripheral blood of infected horses. This reaction was shown to be specific for the interaction of equine infectious anemia virus and T lymphocytes. Enriched B-lymphocyte populations did not divide when exposed to equine infectious anemia virus. Macrophages were depleted from the reaction by two methods: adherence to Sephadex and a combination of binding to Sephadex and adherence to complement-coated erythrocytes. Both methods reduced the number of monocytes, but only the combination of Sephadex and complement-coated cells removed the accessory cells needed for lymphocyte proliferation. We conclude that during the chronic stages of equine infectious anemia the number of antigen-reactive T lymphocytes fluctuates within the peripheral blood and that these cells require a complement-binding cell for reaction. The relationship of these cells to the lymphoproliferative stages of this disease is discussed.
Publication Date: 1982-04-01 PubMed ID: 6281191PubMed Central: PMC351181DOI: 10.1128/iai.36.1.38-46.1982Google Scholar: Lookup
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- Journal Article
- Research Support
- U.S. Gov't
- Non-P.H.S.
- Research Support
- U.S. Gov't
- P.H.S.
Summary
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This research article investigates the types of cells involved in the immune response to equine infectious anemia, a chronic viral disease of horses, and how this response changes over time. The study found that T lymphocytes are key in the immune response to the virus, and the number of these cells in the blood of infected horses fluctuates unpredictably during the chronic stages of the disease.
Study Overview
- The primary aim of this research was to determine the types of cells that are involved in the body’s immune response to equine infectious anemia virus (EIAV) and the dynamics of this response.
- The researchers conducted their study using in vitro methods where conditions could be controlled more efficiently.
Key Findings
- The researchers found out that T lymphocytes, a type of white blood cell, were involved in the immune response to EIAV.
- Meanwhile, another type of lymphocytes, B lymphocytes, did not respond to the EIAV exposure.
- Interestingly, the researchers also observed that the number of immune cells responding to the virus in the blood of infected horses was varying unpredictably over time.
Role of Macrophages
- Macrophages, another type of immune cells, were found to play a role in lymphocyte activation.
- When macrophages were removed from the response through processes such as adherence to Sephadex and complement-coated cells, there was a decline in lymphocyte proliferation, indicating their role in immune response.
Conclusions
- The study concluded that T lymphocytes, specifically those that react with EIAV, increase and decrease unpredictably in the bloodstream during the chronic stages of equine infectious anemia.
- The researchers also determined that these antigen-reactive T lymphocytes require the presence of another cell type, a complement-binding cell, in order to react with the virus.
- This study contributes to broadening the understanding of disease mechanisms in equine infectious anemia and potentially facilitating the development of more effective treatments.
Cite This Article
APA
Shively MA, Banks KL, Greenlee A, Klevjer-Anderson P.
(1982).
Antigenic stimulation of T lymphocytes in chronic nononcogenic retrovirus infection: equine infectious anemia.
Infect Immun, 36(1), 38-46.
https://doi.org/10.1128/iai.36.1.38-46.1982 Publication
Researcher Affiliations
MeSH Terms
- Animals
- Antigens, Viral / immunology
- B-Lymphocytes / immunology
- Cell Separation
- Equine Infectious Anemia / immunology
- Horses
- Infectious Anemia Virus, Equine / immunology
- Lectins / pharmacology
- Lymphocyte Activation
- Monocytes / immunology
- T-Lymphocytes / immunology
Grant Funding
- AI07471 / NIAID NIH HHS
- RR 05465-7 / NCRR NIH HHS
References
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Citations
This article has been cited 4 times.- Sellon DC, Fuller FJ, McGuire TC. The immunopathogenesis of equine infectious anemia virus.. Virus Res 1994 May;32(2):111-38.
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- Issel CJ, Horohov DW, Lea DF, Adams WV Jr, Hagius SD, McManus JM, Allison AC, Montelaro RC. Efficacy of inactivated whole-virus and subunit vaccines in preventing infection and disease caused by equine infectious anemia virus.. J Virol 1992 Jun;66(6):3398-408.
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