Abstract
Introduction: Hereditary angioedema (HAE) is a genetic disease caused by C1-esterase inhibitor deficiency, characterized by recurrent attacks of intense, massive, localized subcutaneous oedema that can involve all parts of the body. The aim of this study is a comparison of the clinical effectiveness of conestat alfa, human C1 esterase inhibitor (C1INH) and icatibant in the treatment of acute angioedema attacks in adults with HAE. Materials and methods: A systematic review of literature published up to May 2012 was performed to assess the efficacy and safety of conestat alfa, C1INH and icatibant in the treatment of acute angioedema attacks in adults with HAE. Databases were searched at MEDLINE (PubMed), EMBASE and Cochrane. The general search structure was designed as a combination of keywords or synonyms: (hereditary angioedema) AND (conestat alfa OR human C1 esterase inhibitor concentrate or synonyms OR icatibant). Only randomized clinical studies were selected. Results: Systematic review yielded no clinical trials directly comparing the therapeutic options mentioned. Two randomized clinical trials were found which compared each of the following: conestat alfa, C1INH and icatibant with placebo. Based on the gathered evidence it was demonstrated that taking any of the medicinal substances mentioned in the treatment of acute angioedema attack results in a shorter time to the start of symptom relief and the time to reduce symptoms, the probability of treatment response after 4 hours is increased and the safety profile is comparable to placebo. Conclusions: Due to the significant heterogeneity of the identified trials, the scientific evidence available was insufficient to identify the most effective therapeutic option in the treatment of acute oedemas in HAE.
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