Copper in ankylosing spondylitis and rheumatoid arthritis

Area of Science:

• Biochemistry
• Rheumatology
• Clinical Chemistry

Background:

• Copper metabolism is altered in inflammatory conditions.
• Rheumatic diseases, such as ankylosing spondylitis and rheumatoid arthritis, involve significant inflammation.
• The role of copper in the pathogenesis of these diseases requires further elucidation.

Purpose of the Study:

• To investigate the role of copper and its binding proteins in inflammatory rheumatic diseases.
• To compare copper levels and their correlation with inflammatory markers in ankylosing spondylitis and rheumatoid arthritis patients.
• To determine if elevated copper levels represent an acute phase response.

Main Methods:

• Serum copper and ceruloplasmin levels were measured.
• Erythrocyte sedimentation rate (ESR) was used as a marker of inflammation.
• Radio-copper studies assessed plasma incorporation and urinary excretion.

Main Results:

• Patients with ankylosing spondylitis and rheumatoid arthritis showed elevated serum copper and ceruloplasmin compared to controls.
• These parameters correlated significantly with ESR, indicating increased inflammatory activity.
• Non-ceruloplasmin bound copper was higher in rheumatoid arthritis than in ankylosing spondylitis patients, despite similar total copper levels.

Conclusions:

• Elevated serum and urine copper levels in inflammatory rheumatic diseases are likely an acute phase response.
• Differences in copper binding suggest distinct disease mechanisms or responses.
• Copper dysregulation may play a role in the inflammatory processes of rheumatic diseases.