PURPOSE: To determine the prevalence of FOXC1 and PITX2 mutations and to assess clinical phenotypes in a cohort of German patients with Axenfeld-Rieger malformations. METHODS: All coding exons of the FOXC1 and PITX2 genes were amplified by PCR from genomic DNA and subjected to direct DNA sequencing. Analysis of mutations in control subjects was performed by restriction fragment length polymorphism (RFLP) analysis. RESULTS: Sequence variants were identified by DNA sequencing in 15 of 19 cases. Mutation screening identified four potentially pathogenic FOXC1 mutations causing amino acid substitutions (P79R, Y115S, G149D, and M161V) that were not present in 100 control subjects. In addition, two different 1-bp deletions causing a frameshift and subsequent premature stop codon were identified in two subjects. One patient harbored a FOXC1 nonsense mutation (S48X). Mutation screening also identified two potentially pathogenic PITX2 mutations (P64L and P64R) in two index patients that were excluded in 100 healthy control subjects. CONCLUSIONS: The findings in the present study clearly demonstrate that FOXC1 and PITX2 mutations are responsible for a significant proportion of Axenfeld-Rieger malformations in Germany.
PURPOSE: To determine the prevalence of FOXC1 and PITX2 mutations and to assess clinical phenotypes in a cohort of German patients with Axenfeld-Rieger malformations. METHODS: All coding exons of the FOXC1 and PITX2 genes were amplified by PCR from genomic DNA and subjected to direct DNA sequencing. Analysis of mutations in control subjects was performed by restriction fragment length polymorphism (RFLP) analysis. RESULTS: Sequence variants were identified by DNA sequencing in 15 of 19 cases. Mutation screening identified four potentially pathogenic FOXC1 mutations causing amino acid substitutions (P79R, Y115S, G149D, and M161V) that were not present in 100 control subjects. In addition, two different 1-bp deletions causing a frameshift and subsequent premature stop codon were identified in two subjects. One patient harbored a FOXC1 nonsense mutation (S48X). Mutation screening also identified two potentially pathogenic PITX2 mutations (P64L and P64R) in two index patients that were excluded in 100 healthy control subjects. CONCLUSIONS: The findings in the present study clearly demonstrate that FOXC1 and PITX2 mutations are responsible for a significant proportion of Axenfeld-Rieger malformations in Germany.
Authors: F Castinetti; M L Brinkmeier; D F Gordon; K R Vella; J M Kerr; A H Mortensen; A Hollenberg; T Brue; E C Ridgway; S A Camper Journal: Mol Endocrinol Date: 2011-09-29
Authors: Carly J Lewis; Adam Hedberg-Buenz; Adam P DeLuca; Edwin M Stone; Wallace L M Alward; John H Fingert Journal: Hum Mol Genet Date: 2017-08-01 Impact factor: 6.150
Authors: Thomas Doerdelmann; Douglas J Kojetin; Jamie M Baird-Titus; Laura A Solt; Thomas P Burris; Mark Rance Journal: Biochemistry Date: 2012-01-06 Impact factor: 3.162
Authors: Simone Dressler; Philipp Meyer-Marcotty; Nicole Weisschuh; Anahita Jablonski-Momeni; Klaus Pieper; Gwendolyn Gramer; Eugen Gramer Journal: Case Rep Med Date: 2010-03-21
Authors: Annie Simard; Luciano Di Giorgio; Melanie Amen; Ashley Westwood; Brad A Amendt; Aimee K Ryan Journal: Dev Dyn Date: 2009-10 Impact factor: 3.780