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Understanding SARS-CoV-2 endocytosis for COVID-19 drug repurposing
1Institute of Neuroregeneration and Neurorehabilitation, Qingdao University, Qingdao, Shandong, China.
Abstract:
The quest for the effective treatment against coronavirus disease 2019 pneumonia caused by the severe acute respiratory syndrome (SARS)-coronavirus 2(CoV-2) coronavirus is hampered by the lack of knowledge concerning the basic cell biology of the infection. Given that most viruses use endocytosis to enter the host cell, mechanistic investigation of SARS-CoV-2 infection needs to consider the diversity of endocytic pathways available for SARS-CoV-2 entry in the human lung epithelium. Taking advantage of the well-established methodology of membrane trafficking studies, this research direction allows for the rapid characterisation of the key cell biological mechanism(s) responsible for SARS-CoV-2 infection. Furthermore, 11 clinically approved generic drugs are identified as potential candidates for repurposing as blockers of several potential routes for SARS-CoV-2 endocytosis. More broadly, the paradigm of targeting a fundamental aspect of human cell biology to protect against infection may be advantageous in the context of future pandemic outbreaks.
Insights
Understanding how SARS-CoV-2 enters lung cells is key to developing effective COVID-19 treatments. This study identifies potential drug targets by investigating viral entry pathways, offering new therapeutic strategies.
Area of Science:
- Cell Biology
- Virology
- Pharmacology
Background:
- Effective treatments for coronavirus disease 2019 (COVID-19) pneumonia, caused by SARS-CoV-2, are limited by incomplete understanding of the virus's cellular mechanisms.
- Viruses often utilize endocytosis to infect host cells, necessitating investigation into the specific endocytic pathways SARS-CoV-2 employs in human lung epithelium.
Purpose of the Study:
- To elucidate the cell biology of SARS-CoV-2 infection by characterizing the endocytic pathways used for viral entry.
- To identify potential host-targeting therapeutics by screening clinically approved drugs as inhibitors of SARS-CoV-2 endocytosis.
Main Methods:
- Utilized established membrane trafficking methodologies to study viral entry mechanisms.
- Investigated diverse endocytic pathways for SARS-CoV-2 entry into human lung epithelial cells.
- Screened 11 clinically approved generic drugs for their potential to block identified viral entry routes.
Main Results:
- Characterized key cell biological mechanisms involved in SARS-CoV-2 infection.
- Identified 11 clinically approved drugs as potential candidates for repurposing.
- These drugs showed potential to inhibit specific SARS-CoV-2 endocytic pathways.
Conclusions:
- Targeting fundamental host cell biology, specifically endocytic pathways, offers a promising strategy against SARS-CoV-2 infection.
- Drug repurposing of existing generic medications presents a rapid approach to developing COVID-19 treatments.
- This research provides a framework for future pandemic preparedness by focusing on host-directed therapies.
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