J. Alanko et al., PANAXYNOL, A POLYACETYLENE COMPOUND ISOLATED FROM ORIENTAL MEDICINES,INHIBITS MAMMALIAN LIPOXYGENASES, Biochemical pharmacology, 48(10), 1994, pp. 1979-1981
Panaxynol is a polyacetylene compound isolated from commonly used orie
ntal medicines, and its effects on various cyclooxygenases and lipoxyg
enases were investigated. The compound had only a marginal effect on c
yclooxygenase activities (IC50 values much greater than 100 mu M), but
inhibited lipoxygenases; 5-lipoxygenase (IC50, 2 mu M), two isoforms
of 12-lipoxygenase (leukocyte-type, 1 mu M; platelet-type, 67 mu M) an
d 15-lipoxygenase (4 mu M). Thus, panaxynol inhibited leukocyte-type 1
2-lipoxygenase much more effectively than platelet-type 12-lipoxygenas
e. Falcarindiol, an analogue of panaxynol, inhibited these lipoxygenas
es with higher IC50 values than panaxynol. These compounds could provi
de a clue to develop a selective inhibitor of one isoform of 12-lipoxy
genase.