These furanones inhibit lipid peroxidation by
oxygen radicals. HEMF scavenges singlet oxygen and its
scavenging potency is greater than that of methionine, a
singlet oxygen scavenger (data not shown). It was reported
that the formation of reactive oxygen species (ROS), such
as hydrogen peroxide (H2O2) and superoxide anion radicals,
by human polymorphonuclear leucocytes (PMNs) stimulated
by 12-O-tetradecanoylphorbol-13-acetate (TPA) induces
oxidative DNA damage in vitro and in vivo (31, 32).
TPA is a potent tumor promoter. The inhibition of H2O2 formation
is a characteristic of many chemopreventive agents
including tamoxifen, sarcophytols and epigallocatechin gallate
(33–35). Some of these compounds are antioxidants and
inhibitors of tumor promotion (33, 34).
These furanones inhibit lipid peroxidation by
oxygen radicals. HEMF scavenges singlet oxygen and its
scavenging potency is greater than that of methionine, a
singlet oxygen scavenger (data not shown). It was reported
that the formation of reactive oxygen species (ROS), such
as hydrogen peroxide (H2O2) and superoxide anion radicals,
by human polymorphonuclear leucocytes (PMNs) stimulated
by 12-O-tetradecanoylphorbol-13-acetate (TPA) induces
oxidative DNA damage in vitro and in vivo (31, 32).
TPA is a potent tumor promoter. The inhibition of H2O2 formation
is a characteristic of many chemopreventive agents
including tamoxifen, sarcophytols and epigallocatechin gallate
(33–35). Some of these compounds are antioxidants and
inhibitors of tumor promotion (33, 34).
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