Characterization of CD4-Positive Lymphocytes in the Antiviral Response of Olive Flounder (Paralichthys oliveceus) to Nervous Necrosis Virusopen access
- Jung, Jae Wook; Chun, Jin Hong; Lee, Jung Seok; Kim, Si Won; Lee, Ae Rin; Kim, Jaesung; Lazarte, Jassy Mary S.; Kim, Young Rim; Kim, Hyoung Jun; Thompson, Kim D.; Jung, Tae Sung
- Issue Date
- CD4 T lymphocytes; helper T cells; monoclonal antibody; nervous necrosis virus; olive flounder
- INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES, v.21, no.11
- Journal Title
- INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
- The presence of CD4 T lymphocytes has been described for several teleost species, while many of the main T cell subsets have not been characterized at a cellular level, because of a lack of suitable tools for their identification, e.g., monoclonal antibodies (mAbs) against cell markers. We previously described the tissue distribution and immune response related to CD3 epsilon and CD4-1 T cells in olive flounder (Paralichthys oliveceus) in response to a viral infection. In the present study, we successfully produce an mAb against CD4-2 T lymphocytes from olive flounder and confirmed its specificity using immuno-blotting, immunofluorescence staining, flow cytometry analysis and reverse transcription polymerase chain reaction (RT-PCR). Using these mAbs, we were able to demonstrate that the CD3 epsilon T cell populations contain both types of CD4(+) cells, with the majority of the CD4 T cell subpopulations being CD4-1(+)/CD4-2(+) cells, determined using two-color flow cytometry analysis. We also examined the functional activity of the CD4-1 and CD4-2 cells in vivo in response to a viral infection, with the numbers of both types of CD4 T cells increasing significantly during the virus infection. Collectively, these findings suggest that the CD4 T lymphocytes in olive flounder are equivalent to the helper T cells in mammals in terms of their properties and function, and it is the CD4-2 T lymphocytes rather than the CD4-1 T cells that play an important role in the Th1 immune response against viral infections in olive flounder.
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- 수의과대학 > Department of Veterinary Medicine > Journal Articles
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