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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Induction of suppressor cells from peripheral blood T cells by 15-hydroperoxyeicosatetraenoic acid (15-HPETE).

15-hydroperoxyeicosetetraenoic acid (15-HPETE), a lipoxygenase metabolite of arachidonic acid, inhibited polyclonal IgG and IgM production in pokeweed mitogen (PWM)-stimulated cultures of human peripheral blood mononuclear cells, whereas 15-hydroxyeicosetetraenoic acid (15-HETE) had little effect in this system. T cells preincubated for 18 hr with 15-HPETE caused substantial inhibition of IgG and IgM production of fresh, autologous B and T cells stimulated by PWM. The suppressive effect of the 15-HPETE-treated cells was lost if the cells were irradiated before the PWM culture, but not by treatment with mitomycin C. The suppressive effect was also lost if OKT8+ T cells were removed after, but not before, preincubation of the T cells with 15-HPETE. OKT8- T cells incubated with 15-HPETE for 18 hr showed a large increase in the percentage of cells staining with directly fluoresceinated Leu-2, another marker for suppressor cells. Thus, 15-HPETE induces functional and phenotypic suppressor cells from resting human peripheral blood T cells.[1]


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