In vitro and in vivo inhibition of LPS-induced tumor necrosis factor-α production by dimeric gallotannin analogues Original Research Article

Designed dimeric gallotannin analogues featuring two tetragalloylglucopyranose cores connected by various hydrocarbon linkers inhibit tumor necrosis factor-α secretion from lipopolysaccharide-stimulated human peripheral blood mononuclear cells by up to 53% (5–24 μM concentration range) compared to control. Comparable suppression of tumor necrosis factor-α levels (∼50% vs control) was observed in the plasma of rats co-treated with lipopolysaccharide and specific tannin analogues selected for their lack of interleukin 1-β stimulating activity.