The lipoxygenase product hydroperoxyeicosatetraenoic acid (HPETE) has immunosuppressive properties in vitro and in vivo. It was observed that 15-HPETE inhibit the sheep red blood cell rosette formation and the concanavalin A-induced blast transformation of human lymphocytes. This inhibition was HLA-linked. HLA-B12 subjects were less sensitive than non-B12 subjects. It is likely that HPETE acids are macrophage mediators which inhibit some lymphocyte functions.
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Gualde et al. (1982) studied this question.
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