The study of the antiviral effect of a soft dosage form
DOI:
https://doi.org/10.24959/nphj.24.155Keywords:
мангіферин; противірусна активність; вірус простого герпесу; цитотоксичністьAbstract
Aim. To study the antiviral activity of a soft medicine with mangiferin against the herpes simplex virus.
Materials and methods. The studies used samples of the soft dosage form developed with mangiferin, a xanthone belonging to the class of polyphenols. Mangiferin is a light yellow fine crystalline powder obtained from the leaves of the mango tree (Mangifera indica), (manufacturer Shaanxi, China). The substance contains 98.5 % of mangiferin.
The antiviral activity was studied on Vero kidney cells of an African green monkey obtained from the Cell Bank of the Institute of Experimental Pathology, Oncology and Radiobiology named after R. E. Kavetsky of the National Academy of Sciences of Ukraine. The cell cultivation was performed according to standard methods. The cultivation and accumulation of the virus was carried out on Vero cell culture. The infectious titer of the virus was 7.4 log10 TCD 50/ml. The MTT modification analysis was used to study the cell viability. The antiviral activity was studied according to standard methods. The virulicidal activity against HSV-1 was determined by decreasing the cytopathic effect of the virus on cells and the virus titer using the MTT method.
Results and discussion. The determination of the direct effect of the test sample on the extracellular herpes virus (virucidal effect) of an undiluted sample and samples in a dilution of 1:2.5 and 1:5 showed their ability to exhibit a significant virucidal effect against HSV-1 regardless of the dilution used and the exposure time with the virus. It was found that the decrease in the titer of the herpes virus was within 1.7-2.2 log10. When studying the ability of the test sample to influence the development of the cytopathic effect of the herpes virus on cells, it was determined that in dilutions (1:20-1:320), the sample inhibited the reproduction of the virus and the development of HSV-1 on Vero cells compared to the control virus. The greatest efficiency was found when using the sample in dilutions of 1:80-1:320; the reduction in the development of the cytopathic effect of the virus on cells was in the range of 59-64 %. When studying the infectious titer of the herpes virus synthesized de novo after the treatment with various dilutions of the test sample, it was shown that the test sample in the dilutions used did not significantly affect the synthesis of the infectious progeny of the virus, the decrease in the viral titer did not exceed 1.1 log10. Cytotoxicity assays showed that in the dilutions of 1:40 or more, the maximum reduction in cell viability was 18 %, indicating low toxicity of the sample.
Conclusions. According to the results of the study, the ability of the test sample containing 5 % mangiferin to effectively inactivate the extracellular herpes simplex virus Type 1 and significantly inhibit the development of the cytopathic effect of the virus on cells has been found.
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