Two ellagitannins from the leaves of Terminalia triflora with inhibitory activity on HIV-1 reverse transcriptase.
The bioassay- guided fractionation of the aqueous extract of Terminalia triflora leaves afforded punicalin and 2-O-galloylpunicalin, isolated for the first time from this species. These compounds showed inhibitory activity on HIV-1 reverse transcriptase in a dose-dependent manner. Punicalin showed an IC(50) of 0.11 microg/ml (0.14 microM) and 2-O-galloylpunicalin an IC(50) of 0.10 microg/ml (0.11 microM).
Cátedra de Farmacognosia, Instituto de Química y Metabolismo del Fármaco (IQUIMEFA) (UBA-CONICET), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, República Argentina. vmartino@ffyb.uba.ar
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Morales
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Martínez-Irujo
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Coussio
D004305:Dose-Response Relationship, Drug; D054303:HIV Reverse Transcriptase / Q000037:antagonists & inhibitors*; D015497:HIV-1 / Q000187:drug effects / Q000201:enzymology; D006801:Humans; D047348:Hydrolyzable Tannins / Q000008:administration & dosage / Q000494:pharmacology / Q000627:therapeutic use; D020128:Inhibitory Concentration 50; D008517:Phytotherapy; D010936:Plant Extracts / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D018515:Plant Leaves; D018894:Reverse Transcriptase Inhibitors / Q000008:administration & dosage / Q000494:pharmacology* / Q000627:therapeutic use; D029766:Terminalia
D047348:Hydrolyzable Tannins; D010936:Plant Extracts; D018894:Reverse Transcriptase Inhibitors; C115643:punicalin; D054303:HIV Reverse Transcriptase