Mutation analysis of the FOXL2 gene in Chinese patients with blepharophimosis-ptosis-epicanthus inversus syndrome.
Blepharophimosis-ptosis-epicanthus inversus syndrome (BPES) is an autosomal dominant disorder characterized by blepharophimosis, ptosis and epicanthus inversus. Based on the presence and absence of premature ovarian failure, two clinical types have been distinguished. Both types of BPES have been mapped to chromosome 3q23 and are mostly due to mutations of a forkhead transcription factor FOXL2 gene which locates at this region. We screened for FOXL2 mutations in Chinese patients with BPES. A novel mutation (g.901-930dup30) which could result in an expansion of the polyalanine tract was found in two BPES type II families and one sporadic case. In addition, a new g.952delC mutation was identified in two patients from a BPES family of undetermined type. The previously reported g.892C>T (p.Q219X) was also found in 12 patients from a large BPES family of type I. No mutations were detected in three other BPES families and three sporadic cases. So we speculate that in a fraction of the BPES patients the genetic defect may represent a change in gene dosage or a rearrangement outside the transcription unit of FOXL2.
Tang
Shengjian
S
Plastic and Reconstructive Research Institute, Weifang Medical College, Weifang 261042, Shandong Province, Peoples Republic of China. tsj1950@163.com
Wang
Xiaoke
X
Lin
Lixin
L
Sun
Yan
Y
Wang
Yanli
Y
Yu
Hongbo
H
D000328:Adult; D001483:Base Sequence; D016569:Blepharophimosis / Q000175:diagnosis / Q000235:genetics*; D001763:Blepharoptosis / Q000175:diagnosis / Q000235:genetics*; D016022:Case-Control Studies; D002681:China; D005141:Eyelid Diseases / Q000175:diagnosis / Q000235:genetics*; D005260:Female; D000074842:Forkhead Box Protein L2; D051858:Forkhead Transcription Factors / Q000235:genetics*; D015321:Gene Rearrangement; D005838:Genotype; D006801:Humans; D008297:Male; D008969:Molecular Sequence Data; D009154:Mutation / Q000235:genetics*; D010375:Pedigree; D010641:Phenotype; D016649:Primary Ovarian Insufficiency / Q000175:diagnosis / Q000235:genetics; D013577:Syndrome; D019680:Trinucleotide Repeat Expansion / Q000235:genetics*
C421604:FOXL2 protein, human; D000074842:Forkhead Box Protein L2; D051858:Forkhead Transcription Factors