Intracellular Staphylococcus aureus infection in human osteoblasts: circRNA expression analysis

Area of Science:

• Molecular Biology
• Genomics
• Infectious Diseases

Background:

• Staphylococcus aureus (S. aureus) can cause persistent intracellular bone infections in osteoblasts.
• Understanding osteoblast responses to intracellular S. aureus is crucial for treating bone infections.
• Circular RNAs (circRNAs) have diverse functions, but their role in S. aureus osteoblast infection is unknown.

Purpose of the Study:

• To investigate the role of circRNAs in human osteoblasts during intracellular S. aureus infection.
• To identify differentially expressed circRNAs (DEcircRNAs) and their potential functions.
• To construct a circRNA-miRNA-mRNA regulatory network.

Main Methods:

• Established an intracellular S. aureus infection model in human osteoblasts.
• Utilized RNA sequencing to compare circRNA expression between infected and control groups.
• Validated RNA sequencing results using reverse transcription-quantitative PCR (RT-qPCR).

Main Results:

• Identified 117 upregulated and 125 downregulated DEcircRNAs in S. aureus-infected osteoblasts.
• DEcircRNAs were significantly enriched in pathways related to macromolecule modification and cellular organization.
• Constructed a potential circRNA-miRNA-mRNA regulatory network.

Conclusions:

• This study presents the first circRNA expression profile in human osteoblasts infected with intracellular S. aureus.
• Identified circRNAs may play a significant role in the pathogenesis of S. aureus bone infections.
• The findings provide novel insights into host-pathogen interactions at the molecular level.