Peste des Petits Ruminants Virus Exhibits Cell-Dependent Interferon Active Response

Area of Science:

• Veterinary Virology
• Infectious Diseases
• Immunology

Background:

• Peste des petits ruminants (PPR) is a severe disease affecting small ruminants, caused by PPRV.
• The innate immune response is crucial for controlling PPRV, but its specific mechanisms remain unclear.
• Previous studies on PPRV's effect on innate immunity have yielded conflicting results.

Purpose of the Study:

• To investigate the cell-type-specific innate immune response of goat-derived cells to PPRV infection.
• To determine the impact of PPRV on interferon (IFN) production and IFN-stimulated genes (ISGs) in different cell types.

Main Methods:

• Infection of three goat cell lines (EECs, GSFs, GFs) with PPRV.
• Assessment of PPRV proliferation and IFN expression following poly (I:C) stimulation.
• Quantification of IFN-stimulated gene (ISG) expression.

Main Results:

• PPRV proliferated in all tested cell lines (EECs, GSFs, GFs).
• PPRV infection stimulated Type I and Type III IFN production in EECs, with a stronger response for Type III IFN.
• IFN production was not observed in GSFs or GFs upon PPRV infection; only ISG15 and RSAD2 were significantly upregulated in EECs.

Conclusions:

• The innate immune response to PPRV, particularly IFN production and ISG induction, is cell-type specific.
• This cell-specific response influences the overall innate immunity against PPRV.
• Findings provide insights for developing strategies to control PPRV infection.