Small interfering RNA targeting bovine papillomavirus type 1 E2 induces apoptosis in equine sarcoid transformed fibroblasts.

This research article investigates the effects of a specific small interfering RNA (siRNA) on the bovine papillomavirus type 1 (BPV-1), which causes equine sarcoids, a type of skin tumour in horses. The study finds that this type of siRNA can reduce viral load, inhibit cell growth, and induce cell death in BPV-1 infected cells.

Research Objective and Methodology

• The research aimed to study how an E2-specific siRNA affects the E1 and E2 viral gene expressions, viral load, and cell growth in BPV-1 transformed sarcoid cells.
• This study involved infecting cells derived from equine sarcoids with BPV-1. These cells were then treated with E2-specific siRNA.
• The effects of this treatment on the infected cells’ viral gene expression, viral load, and cell growth were then examined.

Key Findings

• The transfection of the cells with the E2-specific siRNA resulted in a decrease in the expression of both E1 and E2 mRNA.
• Similarly, viral load in the treated cells was lower than in untreated ones, implying the siRNA treatment was successful in reducing the amount of the virus in the cells.
• The growth of the affected cells was also inhibited, and there was a reduction in their ability to grow independently from a surface (anchorage-independent growth).
• Furthermore, the treated cells exhibited significantly higher levels of apoptosis (regulated cell death) compared to control cells.

Conclusion and Implications

• Based on these results, the research concludes that sequence-specific targeting of E2, done through the use of a specific siRNA, offers an effective strategy to both eliminate BPV-1 genomes and induce cell death in BPV-1-transformed cells.
• This study has implications for the treatment of BPV-1 or BPV-2 infections, potentially reducing the prevalence of equine sarcoids in horses and improving their health and lifespan.
• Further work needs to be done to field test this therapeutic strategy and determine its broad applicability and any potential side effects.