Chinese family with atypical granular corneal dystrophy type I caused by the typical R555W mutation in TGFBI
Author:
Corresponding Author:

Affiliation:

Clc Number:

Fund Project:

Zhejiang Key Innovation Team Project of China (No.2009R50039); Zhejiang Key Laboratory Found of China (No.2011E10006); Medical Science and Technology Project of Zhejiang Province, China (No.2010QNA012); Science and Technology Program of Zhejiang University (No.2011FZA7013)

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    AIM: To investigate the clinical features and genetic defects in four generations of a Chinese family affected with atypical granular corneal dystrophy type I (GCD type I).METHODS: Family history and clinical data were recorded. Genomic DNA samples were obtained from peripheral blood leukocytes of all participated. Exons of the transforming growth factor-β-induced(TGFBI) gene were directly sequenced after being amplified by polymerase chain reaction (PCR), and multi-point linkage analysis using microsatellite makers flanking the gene was applied to identify the disease-causing mutation.RESULTS: Clinical features were quite variable in patients, some patients only had opacities in the epithelium, and others revealed multiple bilateral circular, discrete, crumb-like opacities mainly in the epithelium, with several in different depths of corneal stroma, and the performance was different bilaterally, even in the same patient. Directly nucleotide sequencing revealed a heterozygous p.R555W mutation in the coding sequence of the TGFBI gene in all affected individuals of the family, but was not found in all unaffected. The maximum logarithm of odds (LOD) score obtained by multi-point analysis was detected at marker locus D5S393 (LOD=2.740; α=1.000).CONCLUSION: Our case presented with clinical futures and the pathogenic mutations in TGFBI gene, the phenotype of the pedigree was quite different from typical GCD type I, so we suggested that this phenotype was a variant of GCD type I. These findings expand the knowledge about GCD type I, and demonstrate that molecular genetic analysis is important to make an accurate diagnosis of patients with variable corneal dystrophies in clinic.

    Reference
    Related
    Cited by
Get Citation

Su-Juan Zhao, Ya-Nan Zhu, Xing-Chao Shentu, et al. Chinese family with atypical granular corneal dystrophy type I caused by the typical R555W mutation in TGFBI. Int J Ophthalmol, 2013,6(4):458-462

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
Publication History
  • Received:November 09,2012
  • Revised:June 18,2013
  • Adopted:June 18,2013
  • Online: August 22,2013
  • Published: