A new antileishmanial compound, phaseolinone |
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Authors: | R Roy G Bhattacharya K A Siddiqui R Bhadra |
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Institution: | Department of Cellular Biochemistry, Indian Institute of Chemical Biology, Calcutta. |
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Abstract: | Inclusion of phaseolinone, a newly described mycotoxin, at 20 micrograms per ml in a solid culture medium (blood agar overlay) and at 50 micrograms per ml in a liquid culture (medium 199) inhibited the growth of L. donovani promastigotes. About 90% of the motile promastigotes lost motility after exposure to 50 micrograms per ml of phaseolinone for 6-7 h and here 3-day-old culture was more sensitive than 7-day-old culture. In an in vitro assay, DNA dependent RNA polymerase activity of 3-day-old promastigotes was considerably inhibited in the presence of this toxin. Therefore, this key enzyme was suggested to be one of the sites of action of phaseolinone. |
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