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[Analysis of a pedigree affected with hereditary coagulation factor XII deficiency due to a homozygous 252delAsn deletion of F12 gene]. 2020

Xiaoli Cheng, and Liu Yang, and Yijuan Xin, and Lin Zhu, and Mingquan Su, and Xiaoke Hao
Clinical Laboratory, the First Affiliated Hospital of Air Force Medical University, Xi'an, Shaanxi 710032, China. haoxkg@fmmu.edu.cn.

OBJECTIVE To analyze the clinical phenotype and genetic basis of a consanguineous pedigree affected with hereditary coagulation factor XII (FXII) deficiency. METHODS Following extraction of genomic DNA, all exons and flanking regions of F12 gene were subjected to PCR amplification and Sanger sequencing. ClustalX-2.1-win and MutationTaster software was used to analyze the conservation and impact of the variants on protein function. RESULTS DNA sequencing showed that the proband carried a homozygous g.6753-6755delACA deletion (p.252delAsn) in exon 9 of the F12 gene, for which her father, mother and brother were heterozygous carriers. The same deletion was not found in her sister. CONCLUSIONS The homozygous p.252delAsn deletion probably underlies the hereditary FXII deficiency in this pedigree.

UI MeSH Term Description Entries
D008297 Male Males
D009154 Mutation Any detectable and heritable change in the genetic material that causes a change in the GENOTYPE and which is transmitted to daughter cells and to succeeding generations. Mutations
D010375 Pedigree The record of descent or ancestry, particularly of a particular condition or trait, indicating individual family members, their relationships, and their status with respect to the trait or condition. Family Tree,Genealogical Tree,Genealogic Tree,Genetic Identity,Identity, Genetic,Family Trees,Genealogic Trees,Genealogical Trees,Genetic Identities,Identities, Genetic,Tree, Family,Tree, Genealogic,Tree, Genealogical,Trees, Family,Trees, Genealogic,Trees, Genealogical
D005174 Factor XII Stable blood coagulation factor activated by contact with the subendothelial surface of an injured vessel. Along with prekallikrein, it serves as the contact factor that initiates the intrinsic pathway of blood coagulation. Kallikrein activates factor XII to XIIa. Deficiency of factor XII, also called the Hageman trait, leads to increased incidence of thromboembolic disease. Mutations in the gene for factor XII that appear to increase factor XII amidolytic activity are associated with HEREDITARY ANGIOEDEMA TYPE III. Coagulation Factor XII,Hageman Factor,Factor 12,Factor Twelve
D005175 Factor XII Deficiency An absence or reduced level of blood coagulation factor XII. It normally occurs in the absence of patient or family history of hemorrhagic disorders and is marked by prolonged clotting time. Hageman Trait,Coagulation Factor 12 Deficiency,Deficiency, Factor 12,Deficiency, Factor Twelve,Deficiency, Factor XII,Factor 12 Deficiency,Factor Twelve Deficiency,Hageman Factor Deficiency,Deficiencies, Factor 12,Deficiencies, Factor Twelve,Deficiencies, Factor XII,Deficiency, Hageman Factor,Factor 12 Deficiencies,Factor 12 Deficiency,Factor Deficiency, Hageman,Factor Twelve Deficiencies,Factor XII Deficiencies
D005260 Female Females
D006579 Heterozygote An individual having different alleles at one or more loci regarding a specific character. Carriers, Genetic,Genetic Carriers,Carrier, Genetic,Genetic Carrier,Heterozygotes
D006720 Homozygote An individual in which both alleles at a given locus are identical. Homozygotes
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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