C-reactive protein levels in hereditary angioedema

Area of Science:

• Immunology
• Genetics
• Pathophysiology

Background:

• Hereditary angioedema (HAE) is characterized by recurrent, potentially life-threatening swelling attacks.
• HAE pathogenesis is linked to C1-inhibitor (C1INH) deficiency and bradykinin overproduction.
• The role of systemic inflammation in HAE attacks requires further elucidation.

Purpose of the Study:

• To investigate the presence and dynamics of systemic inflammation in HAE patients.
• To analyze C-reactive protein (CRP) levels in relation to HAE attack status and clinical presentation.
• To explore the potential link between inflammation and HAE attack triggers.

Main Methods:

• Analysis of CRP levels in 68 HAE patients across asymptomatic, attack, and follow-up periods.
• Correlation of CRP levels with clinical manifestations, particularly attack location.
• Utilizing data from a clinical database of recombinant human C1-inhibitor (rhC1INH) studies.

Main Results:

• Elevated CRP levels were found in 20% of asymptomatic HAE patients.
• CRP levels significantly increased during abdominal HAE attacks and in the subsequent 24 hours.
• Post-attack CRP levels were higher in patients with abdominal attacks compared to other locations.

Conclusions:

• A significant proportion of HAE patients exhibit elevated CRP even when asymptomatic, indicating low-grade systemic inflammation.
• Abdominal HAE attacks are associated with a pronounced inflammatory response, evidenced by significant CRP elevation.
• These findings suggest that systemic inflammatory processes may precede and contribute to the onset of HAE attacks.