Annals of allergy, asthma & immunology : official publication of the American College of Allergy, Asthma, & Immunology · 2012
Clinical, biochemical, and genetic characterization of type III hereditary angioedema in 13 Northwest Spanish families.
СтатьяПоддержка исследования: вне правительства СШАНазвание и аннотация: Перевод в очереди
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Marcos Carmen, López Lera Alberto, Varela Susana, Liñares Tania, Alvarez-Eire Marimar G, López-Trascasa Margarita
Аннотация
BACKGROUND: A new variant of hereditary angioedema has been reported during the last decade. Three main characteristics distinguish it from classic hereditary angioedema: normal C1 inhibitor activity, predominance in women, and different genetic alterations.
OBJECTIVE: To assess the symptoms, laboratory findings, and treatment of a population with type III hereditary angioedema from Northwest Spain.
METHODS: We studied 29 patients (26 female and 3 male) from 13 different families.
RESULTS: The 26 female patients showed a similar clinical pattern to the classic forms of hereditary angioedema, and 22 of these patients had the estrogen-dependent phenotype. Three patients had a negative family history, and 1 of the parents was confirmed as an asymptomatic carrier in 2 of them. All had functional C1 inhibitor activity within the normal range in periods without high estrogen levels, but during attacks (in female patients) and pregnancy, activity decreased to below 50%. One male patient had normal C1 inhibitor activity during attacks, and he was initially diagnosed as having idiopathic angioedema. The C4 and antigenic C1 inhibitor levels were always normal. All studied patients had the c.1032C>A, Thr309Lys mutation in the factor XII gene. The mutation was also found in asymptomatic relatives: 5 of 6 men studied and 1 of 8 women studied.
CONCLUSION: Positive family history is a diagnosis criterion, but it could be lacking because there may be asymptomatic relatives, primarily males.
OBJECTIVE: To assess the symptoms, laboratory findings, and treatment of a population with type III hereditary angioedema from Northwest Spain.
METHODS: We studied 29 patients (26 female and 3 male) from 13 different families.
RESULTS: The 26 female patients showed a similar clinical pattern to the classic forms of hereditary angioedema, and 22 of these patients had the estrogen-dependent phenotype. Three patients had a negative family history, and 1 of the parents was confirmed as an asymptomatic carrier in 2 of them. All had functional C1 inhibitor activity within the normal range in periods without high estrogen levels, but during attacks (in female patients) and pregnancy, activity decreased to below 50%. One male patient had normal C1 inhibitor activity during attacks, and he was initially diagnosed as having idiopathic angioedema. The C4 and antigenic C1 inhibitor levels were always normal. All studied patients had the c.1032C>A, Thr309Lys mutation in the factor XII gene. The mutation was also found in asymptomatic relatives: 5 of 6 men studied and 1 of 8 women studied.
CONCLUSION: Positive family history is a diagnosis criterion, but it could be lacking because there may be asymptomatic relatives, primarily males.