Distinct Cell Transcriptomic Landscapes Upon Henipavirus Infections.

Area of Science:

• Virology
• Molecular Biology
• Genomics

Background:

• Hendra virus (HeV) is a highly pathogenic, Biosafety Level-4 (BSL-4) agent often fatal to humans, with no available treatments.
• Cedar virus (CedV), a related henipavirus, is considered non-pathogenic in experimental infections.
• Pteropid bats are natural reservoirs for both HeV and CedV, but their cellular responses to these viruses are not well understood.

Purpose of the Study:

• To investigate the transcriptomic responses of bat and human cells to HeV and CedV infections.
• To understand the cellular mechanisms underlying the differential pathogenicity of HeV and CedV.
• To explore the role of viral genetic differences in host-pathogen interactions.

Main Methods:

• Infection of bat and human cell lines with HeV and CedV.
• Whole transcriptome sequencing at 6 and 24 hours post-infection.
• Comparative analysis of host gene expression profiles.

Main Results:

• Significant differences in cellular gene expression patterns were observed between HeV and CedV infections, despite their close phylogenetic relationship.
• Host transcriptomic responses diverged dramatically, correlating with known viral lethality.
• Potential differences in the phosphoprotein (P) gene coding strategy between HeV and CedV were identified as a likely cause for the observed divergence.

Conclusions:

• The phosphoprotein (P) gene coding strategy may be a key determinant of henipavirus pathogenicity and host response.
• This study provides novel insights into the molecular mechanisms driving henipavirus-induced disease.
• Understanding these pathogenic mechanisms is crucial for developing future antiviral strategies.