Multi-color super-resolution imaging to study human coronavirus RNA during cellular infection.

Area of Science:

• Virology
• Molecular Biology
• Microscopy

Background:

• Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is a pandemic-spreading virus, necessitating better therapeutic strategies.
• Understanding coronavirus RNA biology during infection is crucial for developing effective treatments against current and future threats.

Approach:

• Developed a robust framework combining high-throughput confocal and super-resolution microscopy for nanoscale study of coronavirus infection.
• Utilized multicolor RNA-immunoFISH to specifically label and visualize genomic RNA (gRNA) and double-stranded RNA (dsRNA) of human coronavirus HCoV-229E.

Key Points:

• The approach revealed a striking spatial organization of gRNA and dsRNA into three distinct structures within infected cells.
• Enabled quantitative characterization of infection status following antiviral drug treatment.

Conclusions:

• The presented framework supports fundamental research into coronavirus biology.
• Facilitates the investigation of therapeutic effects on coronavirus infection at the nanoscale.