Abstract | BACKGROUND: Recent studies reported a gain-of-function mutation in the gene encoding coagulation Factor XII (F12) among 5 German and French families with estrogen-associated angioedema who share a common ancestor. The role of this factor, additional pathways that might contribute to increased bradykinin levels, or both remain to be determined in other families with estrogen-dependent or estrogen-associated inherited angioedema. OBJECTIVE: METHODS: We screened the coding regions of F12 and the gene encoding membrane-bound APP (XPNPEP2), for genetic variants in the 3 affected female subjects. In addition, we genotyped this family for the insertion/deletion polymorphism in the ACE gene, which accounts for variable ACE levels. RESULTS: The 3 affected female subjects all have the threonine-to- lysine (Thre328Lys) mutation, which is associated with higher Factor XII activity. In addition, they have at least one A allele of rs3788853 at the XPNPEP2 locus, which is associated with lower APP activity, and at least one I allele in ACE, which is associated with reduced ACE activity. CONCLUSION: A missense mutation in F12 is present in the 3 affected female subjects of this family with estrogen-dependent inherited angioedema. In addition, these affected females have polymorphisms associated with lower levels of both APP and ACE, the major enzymes responsible for bradykinin degradation. Thus, our study suggests that multiple genes might contribute to estrogen-dependent or estrogen-associated inherited angioedema and explain some of the observed heterogeneity.
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Authors | Qing Ling Duan, Karen Binkley, Guy A Rouleau |
Journal | The Journal of allergy and clinical immunology
(J Allergy Clin Immunol)
Vol. 123
Issue 4
Pg. 906-10
(Apr 2009)
ISSN: 1097-6825 [Electronic] United States |
PMID | 19178938
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Estrogens
- Factor XII
- Aminopeptidases
- X-Pro aminopeptidase
- Peptidyl-Dipeptidase A
- Bradykinin
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Topics |
- Adolescent
- Alleles
- Aminopeptidases
(analysis, genetics, metabolism)
- Angioedemas, Hereditary
(genetics)
- Bradykinin
(metabolism)
- Estrogens
(physiology)
- Factor XII
(genetics)
- Genotype
- Humans
- Male
- Mutation
- Peptidyl-Dipeptidase A
(analysis, genetics)
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