Abstract
Lysenin is a pore-forming toxin derived from coelomic fluid of the earthworm Eisenia foetida. The model of lysenin-induced hemolysis includes the specific binding of lysenin
to sphingomyelin, oligomerization of the pore proteins, and pore formation. Although
the mechanism of lysenin-induced hemolysis is unique, its precise mechanism of action
and its inhibitors are poorly understood. In the present study, we screened for inhibitors
of lysenin-induced hemolysis by using an optimized screening system and found a methanolic
extract of Dalbergia latifolia leaves to be a potential candidate. After isolation and identification, all-E-lutein was identified as the hemolysis inhibitor with an effective dose of 0.025–2.5 ng/mL
without any toxicity. The inhibition by all-E-lutein is likely to occur during the receptor binding and/or pore-forming protein
oligomerization.
Key words
lysenin - hemolysis -
Dalbergia latifolia
- Fabaceae - Indian rosewood - Leguminosae - all-
E-lutein