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Updated: Jul 16, 2025
Basophil Activation Test for Allergy Diagnosis
Published on: May 31, 2021
Serum Amyloid A as a Potential Biomarker for Disease Activity in Chronic Spontaneous Urticaria
Alvaro Carvallo1, Beatriz Veleiro2, Marina Sabaté-Brescó3
1Department of Allergy and Clinical Immunology, Clínica Universidad de Navarra, Pamplona, Spain.
Background:
Chronic spontaneous urticaria (CSU) is an inflammatory skin disease with a complex physiopathology. Serum amyloid A (SAA), an acute-phase reactant, has been proposed as a potential biomarker in urticaria but has yet to be studied in a population with CSU or correlated with disease activity as indicated by the Urticaria Activity Score summed over 7 days (UAS7).
Objective:
We sought to determine SAA-1 levels in patients with CSU and correlate them with its activity and control, as well as with clinical features of CSU and other potential blood biomarkers.
Methods:
We conducted a retrospective multicenter study of 67 patients with CSU, from whom we obtained demographic and clinical data, UAS7 as an indicator of CSU activity, and blood and serum markers.
Results:
SAA-1 levels positively correlated with UAS7 (rs = 0.47, P < .001). SAA-1 levels were higher in patients with noncontrolled (UAS7 > 6) CSU than in those with controlled (UAS ≤ 6) CSU (P < .001) and were also higher in patients with concomitant angioedema (P = .003) or delayed pressure urticaria (P = .003).
Conclusion:
We propose SAA-1 as a potential biomarker for activity in CSU. Further studies are required to evaluate its potential role as a biomarker for other CSU outcomes, such as response to treatment.
