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. 1988 Mar;63(3):431–437.

Oxidative phenomena are implicated in human T-cell stimulation.

C Sekkat 1, J Dornand 1, M Gerber 1
PMCID: PMC1454755  PMID: 3258279

Abstract

Phytohaemagglutinin (PHA), phorbol myristate acetate (PMA) and PHA + PMA stimulation of T-enriched peripheral blood lymphocytes (PBL) and the Jurkat malignant T-cell line leads to oxidative-product formation, as evaluated by flow cytofluorometric studies, an increase in K+ flux across the membrane, cGMP production and a depolarization of the cell membrane. Irradiation (20 Gy), which enhances IL-2 synthesis by activated T-enriched PBL and Jurkat cells, also increases oxidative product formation, K+ flux, cGMP production, and induces cell membrane depolarization. Conversely, irradiation does not produce a rise in intracellular free Ca2+, as measured in PHA-stimulated Jurkat cells. PMA is also without effect on intracellular free Ca2+, added before or after PHA stimulation. Thus, except for the rise in intracellular free Ca2+, irradiation and stimulation exert similar effects on some of the events observed in IL-2-producing Jurkat cells, but these effects are not additive. Stimulation and irradiation effects are shown to be additive or synergistic only for cGMP production. It is proposed that irradiation may increase IL-2 synthesis by participating in an additional signal related to the oxidative metabolism of arachidonic acid (AA).

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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