Clonal growth of carp (Cyprinus carpio) T cells in vitro

Takuya Yamaguchi, Fumihiko Katakura, Satoshi Shitanda, Yoshimitsu Niida, Hideaki Toda, Maki Ohtani, Takeshi Yabu, Hiroaki Suetake, Tadaaki Moritomo, Teruyuki Nakanishi

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)


Carp kidney leukocytes co-cultured with a supporting cell layer resulted in the rapid proliferation of various types of leukocytes including immature leukocytes. Expressions of marker genes for multiple blood cell lineages were observed in the primary culture. However, after several passages, the proliferating cells expressed only T cell and macrophage marker genes. Further RT-PCR analysis revealed that the proliferating cells expressed TCR constant regions (Cα, Cβ, Cγ, Cδ), CD3γ/δ and CD4 (CD4L-1), but did not express CD8α and CD8β. Additionally, in situ hybridization analysis showed that the majority of proliferating cells expressed Cα, Cβ, Cγ, Cδ and CD4. Moreover, 5′-RACE sequences of TCR variable regions (Vα, Vβ, Vγ, Vδ) revealed that the proliferating cells contained a polyclonal T cell repertoire, and most of the Vα and Vβ sequences were functional, but the Vγ and Vδ sequences were non-functional with frame shifts and stop codons. Taken together, these results indicate that the proliferating cells after serial passages predominantly contained CD4+ CD8- αβT cells that simultaneously co-expressed non-functional γδTCR. To obtain CD4+ αβT cell (helper T cell) clones, single cells were picked up from the bulk culture, seeded into each well of 96-well plates and cultured in the presence of supporting cells and conditioned media. T cell colonies formed from single cells after 2-3 weeks. These colony cells expressed Cα, Cβ, Cδ and CD4, and weakly expressed Cγ, but did not express CD8α, CD8β and CD4L-2. Taken together, these results indicate that these clonal T cells resemble a subpopulation of mammalian CD4+ helper T cells.

Original languageEnglish
Pages (from-to)193-202
Number of pages10
JournalDevelopmental and Comparative Immunology
Issue number2
Publication statusPublished - Feb 2011


  • CD4
  • Carp
  • Fish
  • Helper T cell
  • T cell
  • T cell clone
  • T cell receptor
  • αβ T cell
  • γδ T cell


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