Antiviral activity of the rhamnolipids mixture from the antarctic bacterium pseudomonas gessardii M15 against herpes simplex viruses and coronaviruses

Emerging and re-emerging viruses represent a serious threat to human health at a global level. In particular, enveloped viruses are one of the main causes of viral outbreaks, as recently demonstrated by SARS-CoV-2. An effective strategy to counteract these viruses could be to target the envelope by...

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Bibliographic Details
Published in:Pharmaceutics
Main Authors: Giugliano R., Buonocore C., Zannella C., Chianese A., Esposito F. P., Tedesco P., De Filippis A., Galdiero M., Franci G., de Pascale D.
Other Authors: Giugliano, R., Buonocore, C., Zannella, C., Chianese, A., Esposito, F. P., Tedesco, P., De Filippis, A., Galdiero, M., Franci, G., de Pascale, D.
Format: Article in Journal/Newspaper
Language:English
Published: 2021
Subjects:
Antarctic bacteria
Antiviral
Coron-aviru
Enveloped viru
Herpe
Microbial biosurfactant
Rhamnolipid
SARS-CoV-2
TEM
Antarctic
The Antarctic
Antarc*
Online Access:http://hdl.handle.net/11386/4780239
https://doi.org/10.3390/pharmaceutics13122121
https://www.ncbi.nlm.nih.gov/labs/pmc/articles/PMC8704987/
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Summary:Emerging and re-emerging viruses represent a serious threat to human health at a global level. In particular, enveloped viruses are one of the main causes of viral outbreaks, as recently demonstrated by SARS-CoV-2. An effective strategy to counteract these viruses could be to target the envelope by using surface-active compounds. Rhamnolipids (RLs) are microbial biosurfactants displaying a wide range of bioactivities, such as antibacterial, antifungal and antibiofilm, among others. Being of microbial origin, they are environmentally-friendly, biodegradable, and less toxic than synthetic surfactants. In this work, we explored the antiviral activity of the rhamnolipids mixture (M15RL) produced by the Antarctic bacteria Pseudomonas gessardii M15 against viruses belonging to Coronaviridae and Herpesviridae families. In addition, we investigated the rhamnolipids’ mode of action and the possibility of inactivating viruses on treated surfaces. Our results show complete inactivation of HSV-1 and HSV-2 by M15RLs at 6μg/mL, and of HCoV-229E and SARSCoV- 2 at 25 and 50μg/mL, respectively. Concerning activity against HCoV-OC43, 80% inhibition of cytopathic effect was recorded, while no activity against naked Poliovirus Type 1 (PV-1) was detectable, suggesting that the antiviral action is mainly directed towards the envelope. In conclusion, we report a significant activity of M15RL against enveloped viruses and demonstrated for the first time the antiviral effect of rhamnolipids against SARS-CoV-2.

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