Potential protective effects of ethanolic extract of Cuban red propoli
s against toxicity induced by allyl alcohol in mice was investigated.
Propolis at doses of 25, 50 and 100 mg/i.p. significant ly decreased t
he activity of alanine amino transferase (EC 2.6.1.2) in serum and the
levels of mal ondialdehyde in mouse liver after induction with a dose
of 64 mg/kg of allyl alcohol. However, propolis did not increase the
concentration of reduced glutathione in mouse liver which is depleted
by allyl alcohol. Propolis also reduced liver damage induced by allyl
alcohol in mice. This effect was observed by electron microscopy. The
hepatoprotective effects of propolis were dose-dependent and they were
produced when propolis was administered 30 min before allyl alcohol a
dministration. It is indicated that the ethanolic extract of red propo
lis exerts potential hepatoprotective effects in this experimental mod
el which is probably caused by antioxidative properties (e.g. scavengi
ng action against oxygen radicals) of this extract.