Inhibition of HIV-1 reverse transcriptase and protease by phlorotannins from the brown alga Ecklonia cava.
Biol Pharm Bull
; 27(4): 544-7, 2004 Apr.
Article
en En
| MEDLINE
| ID: mdl-15056863
ABSTRACT
The bioassay-directed isolation of a marine brown alga, Ecklonia cava, afforded four phlorotannin derivatives, eckol (1), 8,8'-bieckol (2), 8,4"'-dieckol (3), and phlorofucofuroeckol A (4). Among these compounds, 2 and 3 exhibited an inhibitory effect on human immunodeficiency virus type 1 (HIV-1) reverse transcriptase (RT) and protease. Specifically, they inhibited the RT more potently than the protease. The inhibitory activity of compound 2 (IC(50), 0.51 microM) against HIV-1 RT was comparable to that of nevirapine (IC(50), 0.28 microM), a reference compound. An enzyme kinetic assay showed that this compound inhibited the RNA-dependent DNA synthesis activity of HIV-1 RT noncompetitively against dUTP/dTTP with a K(i) value of 0.78 microM. With respect to the homopolymeric template/primer, (rA)n(dT)15, 8,8'-bieckol (2) displayed an uncompetitive type of inhibition (K(i), 0.23 microM).
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Inhibidores de Proteasas
/
Taninos
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Proteasa del VIH
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Inhibidores de la Transcriptasa Inversa
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Phaeophyceae
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Transcriptasa Inversa del VIH
Idioma:
En
Revista:
Biol Pharm Bull
Asunto de la revista:
BIOQUIMICA
/
FARMACOLOGIA
Año:
2004
Tipo del documento:
Article