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Ectopia lentis phenotypes and the FBN1 gene.
Lesley C Adès1, Katherine J Holman, Maggie S Brett
1Marfan Research Group, The Children's Hospital at Westmead, Westmead, New South Wales, Australia.
American Journal of Medical Genetics. Part A
|April 1, 2004
Summary
Mutations in the fibrillin-1 (FBN1) gene are linked to various connective tissue disorders. This study identifies a recurrent R240C mutation in a large family with isolated ectopia lentis (EL), suggesting it may be a mutational hotspot.
Area of Science:
- Genetics
- Molecular Biology
- Ophthalmology
Background:
- Fibrillin-1 (FBN1) gene mutations are associated with diverse phenotypes including Marfan syndrome (MFS) and isolated ectopia lentis (EL).
- Characterizing FBN1 mutations is crucial for understanding genotype-phenotype correlations in connective tissue disorders.
Purpose of the Study:
- To identify and characterize the FBN1 gene mutation in a large, multigenerational kindred with autosomal dominant isolated EL.
- To provide an updated clinical status of the family and review the literature on EL and FBN1 mutations.
Main Methods:
- Denaturing high-performance liquid chromatography (DHPLC) was employed to detect FBN1 gene mutations.
- Clinical data from the EL kindred was updated and reviewed.
Main Results:
- A recurrent FBN1 mutation, R240C, was identified in the isolated EL kindred.
- The R240C mutation has been previously reported in families with MFS and EL, indicating potential for distinct phenotypes.
Conclusions:
- The R240C mutation is associated with isolated ectopia lentis (EL) in this kindred.
- The findings support R240C as a potential mutational hotspot for isolated EL, highlighting its role in specific connective tissue abnormalities.