Rheumatoid arthritis mediator CD18 expression by Staphylococcus aureus superantigen C in rats

Area of Science:

• Immunology
• Microbiology
• Biochemistry

Background:

• Microbial superantigens are found in rheumatoid arthritis patients.
• Their role in inducing inflammatory biomarkers is under investigation.

Purpose of the Study:

• To investigate the effect of *Staphylococcus aureus* superantigen C on CD18 expression.

Main Methods:

• Superantigen C purification and immunoblotting.
• Intraperitoneal and intra-articular injection of superantigen C into rats.
• RT-real-time PCR analysis of CD18 marker expression in blood samples.

Main Results:

• Intra-articular and intraperitoneal injection of 50 μg superantigen C elevated CD18 expression in rats.
• CD18 expression was significantly higher (2.10-3.3 fold increase) in treated rats compared to controls (P≤ 0.05).

Conclusions:

• *Staphylococcal* superantigen C enhances CD18 inflammatory marker expression.
• This research may lead to new strategies for managing inflammatory diseases like rheumatoid arthritis.