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Role of proliferation in LAK cell development
F J Ramsdell1, H Shau, S H Golub
1Department of Microbiology, UCLA School of Medicine, Los Angeles, CA 90024.
Cancer Immunology, Immunotherapy : CII
|January 1, 1988
Summary
Lymphokine-activated killer (LAK) cell activity isn't solely dependent on proliferation. High cell division doesn't always guarantee LAK activity, suggesting other factors are involved in immune response development.
Area of Science:
- Immunology
- Cell Biology
Background:
- Lymphokine-activated killer (LAK) cells are crucial for immune responses.
- Interleukin-2 (IL-2) is known to activate and expand natural killer (NK) cells, contributing to LAK activity.
Purpose of the Study:
- To investigate the role of lymphocyte proliferation in the development of LAK cell activity.
- To determine if inhibiting or enhancing proliferation affects LAK cell generation.
Main Methods:
- Peripheral blood lymphocytes were cultured with IL-2.
- Proliferation was inhibited using irradiation, mitomycin C, or deferoxamine.
- Proliferation was enhanced using mitogenic lectins phytohemagglutinin (PHA) and concanavalin A (Con A).
Main Results:
- Inhibiting proliferation partially impaired LAK activity, indicating it's not entirely proliferation-dependent.
- PHA and Con A augmented lymphocyte proliferation in response to IL-2.
- PHA, but not Con A, decreased LAK activity, without inhibiting effector cells or expanding irrelevant cells.
Conclusions:
- LAK cell activity is not exclusively dependent on proliferation.
- Enhanced proliferation, particularly with PHA, can paradoxically reduce LAK activity.
- These findings suggest complex regulatory mechanisms influence LAK cell development beyond simple cell division.