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Spontaneous development of functionally active long-term monocytelike cell lines from channel catfish
A N Vallejo1, C F Ellsaesser, N W Miller
1Department of Microbiology, University of Mississippi Medical Center, Jackson 39216.
Summary
Researchers developed long-term channel catfish cell lines from spontaneously proliferating leukocytes. These cells function as efficient antigen-presenting cells, aiding fish immune response studies.
Area of Science:
- Immunology
- Cell Biology
- Aquaculture
Background:
- Spontaneous proliferation of channel catfish leukocytes in vitro was unexpectedly frequent.
- This led to the development of long-term cell lines with monocyte/macrophage characteristics.
Purpose of the Study:
- To characterize novel, long-term channel catfish cell lines.
- To investigate their functional capabilities as antigen-presenting cells and cytokine producers.
Main Methods:
- Culturing spontaneously proliferating channel catfish leukocytes.
- Characterizing cell lines for esterase, peroxidase, phagocytosis, and morphology.
- Assessing interleukin-1 secretion upon lipopolysaccharide induction.
- Evaluating antigen-presenting cell function with autologous leukocytes.
Main Results:
- Established cell lines exhibiting monocyte/macrophage markers and functions.
- Demonstrated lipopolysaccharide-induced secretion of catfish interleukin-1.
- Confirmed efficient antigen presentation to autologous leukocytes, supporting specific immune responses.
- Showed inhibition of antigen presentation by known blocking agents.
Conclusions:
- Novel channel catfish cell lines possess key immune accessory cell functions.
- These cell lines are valuable tools for studying fish immunology and cellular interactions.
- Facilitates research into fish immune responses and antigen presentation mechanisms.