Ebselen is known as anti-inflammatory and anti-oxidant selenium containing drug. We have synthetized 13 seleno-organic compounds, analogs of ebselen. Seven of them were found to be inducers of interferon gamma (IFN-gamma) and/or tumor necrosis factor alpha (TNF-alpha) in human peripheral blood leukocytes (PBL) cultures. The most active cytokine inducers were: 2-phenyl-1,2-benzisoselenazol-3(2H)-one (1, ebselen), bis [2-(N-phenylcarbamoyl)]phenyl diselenide (7) and bis (2-[N-(2-pyridyl)carbamoyl])phenyl diselenide (8). The amounts of IFN and TNF produced by PBL cultures in response to the seleno-organic compounds were found to be similar to that induced by phytohemagglutinin (PHA). The activities of the seleno-organic compounds were dose-dependent and related to the chemical structure of the drugs suggesting involvement of the specific cytokine-inducer receptor. The simultaneous inductions of IFN-gamma and TNF-alpha were highly correlated, but independent on each other.

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