Antiviral activity of natural humic substances and shilajit materials against HIV-1: relation to structure.

Antiviral activity of natural humic substances and shilajit materials against HIV-1: relation to structure. Environ Res. 2020 Oct 13;:110312 Authors: Zhernov YV, Konstantinov AI, Zherebker A, Nikolaev E, Orlov A, Savinykh MI, Kornilaeva GV, Karamov EV, Perminova IV Abstract Natural products, such as humic substances (HS) and shilajit, are known to possess antiviral activity. Humic-like components are often called as carriers of biological activity of shilajit. The goal of this study was to evaluate anti-HIV activity of well characterized HS isolated from coal, peat, and peloids, and compare it to that of water-soluble organic matter (OM) isolated from different samples of Shilajit. The set of humic materials included 16 samples of different fractional composition: humic acid (HA), hymatomelanic acid (HMA), fulvic acid (FA). The set of shilajit OM included 19 samples of different geographic origin and level of alteration. The HIV-1 p24 antigen assay and cell viability test were used for assessment of antiviral activity. The HIV-1 Bru strain was used to infect CEM-SS cells. The obtained EC50 values varied from 0.37 to 1.4 mg·L-1 for the humic materials, and from 14 to 142 mg·L-1 for the shilajit OM. Hence, all humic materials used in this study outcompeted largely the shilajit materials with respect to anti-HIV activity: For the humic materials, the structure-activity relationships revealed strong correlation between the EC50 values ...
Source: Environmental Research - Category: Environmental Health Authors: Tags: Environ Res Source Type: research