An observational study of endothelial function in early arthritis

Area of Science:

• Rheumatology
• Vascular Biology
• Immunology

Background:

• Endothelial dysfunction is a known complication of established rheumatoid arthritis.
• The precise stage at which endothelial abnormalities develop in early arthritis remains unclear.

Purpose of the Study:

• To investigate the presence of endothelial damage and dysfunction in patients with early arthritis (EA).
• To determine if early arthritis is associated with specific endothelial and angiogenesis markers.

Main Methods:

• Assessed 18 early arthritis patients, 48 healthy controls, and 25 disease controls.
• Measured plasma biomarkers including von Willebrand factor (vWF), soluble E-selectin, vascular endothelial growth factor (VEGF), sFlt-1, intercellular adhesion molecule 1 (ICAM-1), vascular cell adhesion molecule 1 (VCAM-1), and circulating endothelial cells (CECs).
• Evaluated microvascular function using laser Doppler perfusion imaging and macrovascular function via flow-mediated brachial artery dilatation.

Main Results:

• Elevated levels of von Willebrand factor (vWF) and circulating endothelial cells (CECs) were observed in early arthritis patients (P < 0.05).
• These elevations were independent of classical inflammation markers such as C-reactive protein (CRP), erythrocyte sedimentation rate (ESR), and IL-6.
• No significant differences were found in other assessed biomarkers.
• Microvascular and macrovascular abnormalities were primarily related to endothelium-independent responses.

Conclusions:

• Endothelial damage and dysfunction are present in the early stages of inflammatory arthritis.
• These early vascular changes are not directly correlated with systemic inflammation markers.