Brand C, Grimbaldeston MA, Gamble JR, Drew J, Finlay-Jones JJ, Hart PH
Inflammation Research, 2002
To examine the anti-inflammatory activities of tea tree oil (TTO) in vivo.
Mice were sensitized to a chemical hapten, trinitrochlorobenzene, on their ventral skin and 7 days later challenged (or re-exposed) on their dorsal skin with the same hapten.
TTO applied 30 min before or up to 7 h after to the same dorsal site as hapten challenge caused a significant reduction in skin swelling after 24 h. TTO reduced oedema but not the influx of inflammatory cells. This finding was supported by the inability of TTO to suppress TNFalpha-induced E-selectin expression by human umbilical vein endothelial cells. TTO did not suppress irritant- or ultraviolet B-induced oedema.
Topical TTO, specifically the TTO components, terpinen-4-ol and alpha-terpineol can regulate the oedema associated with the efferent phase of a contact hypersensitivity response.
Brand C, Grimbaldeston MA, Gamble JR, Et Al. Tea tree oil reduces the swelling associated with the efferent phase of a contact hypersensitivity response. Inflamm Res. 2002;51(5):236-244.