[Phenotype characteristic of the ionomycin-resistant CD4+ subset of the peripheral blood T-lymphocytes].
2003
: The differential sensitivity of peripheral blood (PB) CD4+ T lymphocytes to the calcium ionophore ionomycin was investigated. Effect of ionomycin exerted on T cells was time- and dose-dependent. We have shown that resistant cells belonged to some distinct T cell subsets. The resting naive CD4+CD45RA+ T cells showed a little, if any, resistance to ionomycin treatment. The primed CD4+CD45R0+ memory T cells behaved similarly as did ionomycin-resistant (IR) cells. Although IR CD4+ T cells had a typical "memory" phenotype, some quantitative differences were found in expression of CD11a, CD28, CD29, CD62L and CD243 markers between PB CD4+CD45R0+ T cells and corresponding IR cells.
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