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1993:
Hellstrand K; Czerkinsky C; Ricksten A; Jansson B; Asea A; Kylefjord H; Hermodsson S
Role of serotonin in the regulation of interferon-gamma production by human natural killer cells.
Journal of interferon research 1993;
13(
1):.
Monocytes, recovered directly from peripheral blood by counter-current centrifugal elutriation (CCE), were shown to provide two regulatory signals for induction of interferon-gamma (IFN-gamma) in natural killer (NK) cells in response to interleukin-2 (IL-2): an upregulating signal and an inhibitory signal. The inhibitory signal was time-dependent, irreversible, and operating on a pretranslational level, as indicated by the inability of enriched NK cells to accumulate IFN-gamma mRNA in the presence of elutriated monocytes. Monocyte-induced inhibition of IFN-gamma production was abrogated by the biogenic amine serotonin, acting via the 5-hydroxytryptamine, or serotonin (5-HT1A), subset of serotonin receptors (5-HTR). Thereby, serotonin effectively promoted IFN-gamma production in the presence of monocytes. We conclude that serotonergic 5-HT1A receptors transduce signals that are required for NK cells to produce IFN-gamma in response to IL-2.
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