miRNAs and genes expression in MARC-145 cell in response to PRRSV infection

Area of Science:

• Virology
• Immunology
• Molecular Biology

Background:

• MicroRNAs (miRNAs) and their target genes regulate viral replication and host-virus interactions.
• Porcine reproductive and respiratory syndrome virus (PRRSV) causes significant disease, necessitating investigation into its molecular mechanisms.
• Understanding host responses, including miRNA and immune gene expression, is vital for managing PRRSV infections.

Purpose of the Study:

• To investigate the expression profiles of miRNAs and immunity-related genes during PRRSV infection in MARC-145 cells.
• To elucidate the dynamic changes in miRNA and gene expression patterns at different time points post-infection.
• To identify specific miRNAs and genes involved in the host immune response to PRRSV.

Main Methods:

• Quantitative Polymerase Chain Reaction (qPCR) was employed to analyze miRNA and gene expression.
• MARC-145 cells were infected with PRRSV to establish an experimental model.
• Expression levels were assessed at various time points during the infection course.

Main Results:

• Distinct expression patterns for miRNAs and immune-related genes were observed across different infection stages.
• Early PRRSV infection showed increased expression of miR-204, miR-21, miR-181a, and miR-29, with decreased expression in later stages.
• miR-145 was significantly induced, while miR-127 expression was consistently reduced throughout PRRSV infection.

Conclusions:

• PRRSV infection dynamically regulates miRNA and immune-related gene expression in MARC-145 cells.
• These regulated miRNAs and genes play significant roles in the host's immune response to PRRSV.
• The findings provide a foundation for further research into PRRSV-host interactions and potential therapeutic targets.