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Updated: Aug 7, 2025

Production of a SARS-CoV-2 Virus-Like-Particle System to Investigate Viral Life Cycles In Vitro
Published on: June 6, 2025
COVID-19 Biogenesis and Intracellular Transport
Alexander A Mironov1, Maksim A Savin2, Galina V Beznoussenko1
1Department of Cell Biology, IFOM ETS-The AIRC Institute of Molecular Oncology, Via Adamello, 16, 20139 Milan, Italy.
This review details how SARS-CoV-2 (Severe Acute Respiratory Syndrome Coronavirus 2) infects cells and utilizes host machinery for replication. It highlights gaps in understanding the virus
Area of Science:
- Virology
- Cell Biology
- Molecular Biology
Background:
- Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) causes the COVID-19 pandemic.
- The structural biology of SARS-CoV-2 and its proteins is largely understood.
- Viral entry and replication mechanisms are crucial for understanding pathogenesis.
Purpose of the Study:
- To review the cellular biology of SARS-CoV-2 infection.
- To elucidate the intracellular transport mechanisms of SARS-CoV-2.
- To identify knowledge gaps in SARS-CoV-2's intracellular journey.
Main Methods:
- Literature review of SARS-CoV-2 cell biology.
- Analysis of viral entry pathways, including endocytosis.
- Examination of viral replication organelles and protein processing.
- Investigation of virion assembly, transport, and secretion.
Main Results:
- SARS-CoV-2 enters cells via endocytosis, breaching endosomal membranes.
- Viral replication occurs in a specialized organelle within the endoplasmic reticulum.
- Virions undergo maturation, glycosylation in the Golgi complex, and are secreted.
- Significant uncertainties remain regarding intracellular transport dynamics.
Conclusions:
- SARS-CoV-2 hijacks host cell machinery for its life cycle.
- Understanding intracellular transport is key to developing effective therapeutics.
- Further research is needed to clarify SARS-CoV-2's intracellular trafficking pathways.
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