HIV Type-1 Entry Inhibitors with a New Mode of Action
2009
Background:The development of antiviral drugs has provided crucial new means to mitigate or relieve the debilitating effects of many viral pathogens. Regular use of these drugs has led to generation of resistant strains, making the control of many viral infections very difficult, particularly in HIV-seropositive and AIDS patients. A rich source for the discovery of new HIV infection inhibitors has been, and continues to be, the ‘mining’ of the large diversity of compounds already available in nature, and specifically those from botanical extracts.Methods:Using a newly developed direct binding assay with mass spectrometry technology (direct analysis in real-time time-of-flight mass spectrometry), we were able to show that compounds present in extracts of elderberry, cinnamon and green tea bind to and block HIV type-1 (HIV-1) infection in target cells.Results:The compounds that blocked HIV-1 infection were flavonoids and A-type proanthocyanidins. The 50% inhibitory concentration values of these extracts ran...
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