Identification of FBN1 gene mutations in Ukrainian Marfan syndrome patients

Generation of a human induced pluripotent stem cell line (NCCDFWi001-A) from a Marfan syndrome patient carrying two FBN1 variants (c.2613A > C and c.684_736 + 4del)

The human induced pluripotent stem cell line NCCDFWi001-A was derived from peripheral blood mononuclear cells (PBMC) of a 26-year-old female Marfan syndrome patient carrying two compound heterozygous variants FBN1c.2613A > C, (p.Leu871Phe) and c.684_736 + 4del. The established patient-derived iPSC showed expression of pluripotent stem cell markers and had the ability to differentiate into all of the three germ layers and possessed a normal karyotype.

A novel mutation in FBN1 gene in autosomal dominant Marfan syndrome and macular degeneration in a Chinese consanguineous family

AIM

To report a novel mutation in FBN1 gene in a Chinese consanguineous family with common Marfan syndrome (MFS) phenotype and an unusual bilateral macular degeneration.

METHODS

Ophthalmic, cardiovascular and systemic examinations were performed, and genomic DNA extracted from all living family members. The 24-32 exon mutations of FBN1 gene were screened by Sanger Sequencing in all family members and 100 unrelated healthy Chinese individuals.

RESULTS

In the four-generation family, classic MFS phenotypes were observed in all 5 patients, 2 of them had peculiar phenotype of bilateral macular degeneration. Mutation screening in FBN1 identified a heterozygous missense mutation (c.3932A>G, p.Y1311C) with co-segregation. This mutation was found with the MFS phenotypes in all 5 patients but not in unaffected members or unrelated controls.

CONCLUSION

A Chinese consanguineous MFS family with uncommon bilateral macular degeneration and an unreported c.3932A>G mutation in FBN1 was identified. Our finding expands the FBN1 mutation spectrum and its possible role in the pathogenesis of Marfan syndrome.