title: [FVIII intron 22 homologous region mediated recombinations and genotyping methods of hemophilia A].
abstract: The intron 22 inversion is caused by intrachromosomal homologous recombination of the Int22h (intron 22 homologous region) repeats in opposite orientation, accounting for almost 45%-50% of all cases of severe hemophilia A. By contrast, recombinations between similarly oriented int22h repeats in the same chromosome, homologous chromosomes or chromatids may cause deletion or duplication of the intermediate region between the two int22h copies, resulting in false-positive or false-negative possibility that obscure the characterization of intron 22 inversion. The modified long distance PCR(LD-PCR) and inverse shifting PCR(IS-PCR) would distinguish all the possible int22h-mediated rearrangements.
authors.affiliation: Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi Province, China.
authors.forename: Zhi-Ping
authors.initials: ZP
authors.lastname: Guo
authors.affiliation: Department of Hematology, The Second Hospital of Shanxi Medical University, Taiyuan 030001, Shanxi Province, China. E-mail: yanglh5282@163.com.
authors.forename: Lin-Hua
authors.initials: LH
authors.lastname: Yang
mesh_terms: D005169:Factor VIII / Q000235:genetics*; D005838:Genotype; D006467:Hemophilia A / Q000235:genetics*; D006801:Humans; D007438:Introns; D016133:Polymerase Chain Reaction / Q000379:methods*; D011995:Recombination, Genetic
chemical_list: D005169:Factor VIII