J Asthma Allergy Clin Immunol.
1998 Jun;18(2):290-298.
The effect of interleukin 2 on the induction Of Nk 1.1 expression in CD8+ and CD4-CD8-T Cell
Abstract
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BACKGROUND: Murine IL-2-induced lymphokine-activated killers can be divided into two
mutually exclusive subset:NK1.1'CD8 and NK1.1 CD8+. However, there is a strong evidence
that NK cell may belong to T cell lineage. Recently novel lymphocyte subsets, present in
the adult murine thymus, CD3+NK1.1'TCRap(TNK) cell is readily identifiable in fresh obtained
murine adult CD4 CD8 thymocytes.
MATERIAL AND METHOD: We sorted out CD4 and CD8 (double negative.' DN) cells and CD8+ cells
from murine spleen and cultivated these cells with IL-2. And the surface B220, CD8, NK1. 1
and cytopasmic NK1.1 was analysed simultaneously to see whether these cells can be switched
to the other subtype of cells.
RESULT: Purified DN cells were switched to several subtype of cells'. CD8'B220+(LAK cells),
NK1.1'B220+(LAK cells), CD8 B220, cytoplasmic NK1.1+B220 cells. Purified CD8 cells were
switched to CD8+B220' LAK cells and cytoplasmic NK1.1+ CD8+ B220+ and cytoplasmic NK1.1' CD8
B220 cells. In addition, the CD8' cells originated from DN cells do not express the
cytoplasmic NK1.1 in contrary to the sorted CD8 cells.
CONCLUSION
Our results indicated that these will be useful models to investigating CD8 precursor potentials in populations of CD4 CD8 (doble negative) cells and relationship of NK1.1 These results also supports the hypothesis that T cells and NK cells have same ontogeny and CD8 effector functions are potentially diverse and could be exploited by various conditions that switch off host protected cytolytic response. These model offer a way to study the molecular regulation of CD8 gene expression.
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