Inhibitory effects of Korean plants on HIV-1 activities
2001
Min, Byung Sun | Kim, Young Ho | Tomiyama, Miyuki | Nakamura, Norio | Miyashiro, Hirotsugu | Ōtake, Tōru | Hattori, Masao
In the search for novel anti-human immunodeficiency virus type 1 (anti-HIV-1) agents from natural sources, 49 MeOH extracts of Korean plants were screened for their inhibitory effects against RNA-dependent DNA polymerase (RT) and ribonuclease H (RNase H) activities of HIV-1 reverse transcriptase and HIV-1 protease, and anti-HIV-1 activity. Regarding the HIV-1 reverse transcriptase, Agrimonia -pilosa (whole plant), Cornus kousa (stem and leaf), Limonium tetragonum (root) and Mallotus japonicus (stem) showed significant inhibitory activity on RT activity with 50% inhibitory activity (IC₅₀) of 8.9, 6.3, 7.5 and 11.9 μg/mL, respectively, whereas Agrimonia pilosa was also active against RNase H activity (IC₅₀ = 98.4 μg/mL). Four plants, namely Agrimonia pilosa (whole plant), Atractylodes japonica (root), Clematis heracleifolia (whole plant) and Syneilesis palmata (whole plant), were appreciably active (<35%) against recombinant HIV-1 protease at a concentration of 100 μg/mL. Crinum asiaticum var. japonicum (root) showed significant anti-HIV-1 activity (ED₅₀ = 12.5 μg/mL) with a favourable SI value of 16.
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