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Clin Genet. 2003 Dec;64(6):485-90.

Mutational analysis of forkhead transcriptional factor 2 (FOXL2) in Korean patients with blepharophimosis-ptosis-epicanthus inversus syndrome.

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Department of Ophthalmology, College of Medicine, Yeungnam University, Daegu, Republic of Korea.


We screened for mutations in the forkhead transcription factor gene, FOXL2, in Korean patients with sporadic or familial blepharophimosis-ptosis-epicanthus inversus syndrome (BPES) by polymerase chain reaction-single-stranded conformation polymorphism (PCR-SSCP) and direct sequencing. Five of nine BPES families and three of seven sporadic cases were detected to have FOXL2 mutations. We identified four types of FOXL2 mutations, two of which are novel. A new 14 bp deletion (939-952del14) causing a frameshift from G235W and the extension of the predicted protein to 527 amino acids was detected in a BPES family patient. In addition, a novel 845C > A transversion, resulting in a nonsense mutation (S203X), was found in a sporadic case of BPES. The previously reported in-frame 30 bp duplication (909-938dup30) was the most common mutation and was found in eight patients of four BPES families and one sporadic case. A known 17 bp duplication (1080-1096dup17) was observed in a sporadic BPES case. We were unable to find a causal mutation in four BPES families and four sporadic cases. These results suggest that in a fraction of BPES patients, the genetic defect might be associated with a mutation in the non-coding region of the FOXL2 gene or in other genes.

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