Mutation analysis and prenatal diagnosis of FBN1 gene mutations for four patients with Marfan syndrome / 中华医学遗传学杂志
Chinese Journal of Medical Genetics
;
(6): 534-538, 2013.
Article
in Chinese
| WPRIM
| ID: wpr-237212
ABSTRACT
<p><b>OBJECTIVE</b>To screen for mutations of fibrillin-1 (FBN1) gene in 4 patients with Marfan syndrome in order to provide prenatal diagnosis and genetic counseling.</p><p><b>METHODS</b>Potential mutations of the FBN1 gene in the probands were detected with PCR and DNA sequencing. Subsequently, genomic DNA was extracted from amniotic fluid sampled between 18 to 20 weeks gestation. The mutations were confirmed with denaturing high-performance liquid chromatography - robust microsatellite instability (DHPLC-MSI) analysis with maternal DNA as reference. The products were further analyzed by direct sequencing and BLAST search of NCBI database.</p><p><b>RESULTS</b>An IVS46+1G>A substitution was identified in patient A at +1 position of intron 46 of the FBN1 gene. Two novel missense mutations were respectively discovered at positions +4453 of intron 35 in patient B (Cys1485Gly) and position +2585 of intron 21 in patient C (Cys862Tyr). In patient D, a novel deletion (c.3536 delA) was found at position +3536 of intron 28. In all of the 4 cases, the same mutations have been identified in the fetuses.</p><p><b>CONCLUSION</b>FBN1 gene analysis can provide accurate diagnosis of Marfan syndrome, which can facilitate both prenatal diagnosis and genetic counseling.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Prenatal Diagnosis
/
DNA Mutational Analysis
/
Molecular Sequence Data
/
Base Sequence
/
Introns
/
Embryology
/
Sequence Deletion
/
Mutation, Missense
/
Diagnosis
/
Fibrillins
Type of study:
Diagnostic study
Limits:
Adult
/
Female
/
Humans
/
Male
/
Pregnancy
Language:
Chinese
Journal:
Chinese Journal of Medical Genetics
Year:
2013
Type:
Article
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