Detecting changes in arthritic fibroblast-like synoviocytes using atomic force microscopy

Area of Science:

• Biomedical Engineering
• Rheumatology
• Cell Biology

Background:

• Rheumatoid arthritis (RA) diagnosis relies on identifying specific cellular changes.
• Fibroblast-like synoviocytes (FLS) play a crucial role in RA pathogenesis.
• Quantitative morphological analysis of FLS can offer diagnostic insights.

Purpose of the Study:

• To investigate morphological and quantitative differences between arthritic and normal FLS.
• To evaluate the potential of atomic force microscopy (AFM) as a diagnostic tool for RA.
• To correlate FLS surface roughness with RA pathogenesis duration.

Main Methods:

• Fibroblast-like synoviocytes (FLS) were isolated from collagen-induced arthritic (CIA) mice and normal mice.
• Synovial tissue samples were collected at 5-week and 8-week pathogenesis periods.
• Atomic force microscopy (AFM) was used to analyze FLS surface roughness.

Main Results:

• Arthritic FLS exhibited significantly higher surface roughness around the nucleus and cytoplasm compared to normal FLS (P < 0.05).
• The surface roughness of arthritic FLS increased with the duration of RA pathogenesis.
• AFM demonstrated quantifiable differences in FLS morphology between arthritic and normal states.

Conclusions:

• AFM can effectively differentiate between arthritic and normal FLS based on surface roughness.
• AFM shows promise as a diagnostic tool for early RA detection at the intercellular level.
• This technique may be applicable for diagnosing other intercellular diseases.