Novel NR2F1 variant identified by whole-exome sequencing in a patient with Bosch-Boonstra-Schaaf optic atrophy syndrome

Kocaaga A., Yimenicioglu S., Gürsoy H. H.

Indian Journal of Ophthalmology, vol.70, no.7, pp.2762-2764, 2022 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 70 Issue: 7
  • Publication Date: 2022
  • Doi Number: 10.4103/ijo.ijo_1061_22
  • Journal Name: Indian Journal of Ophthalmology
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, BIOSIS, CAB Abstracts, CINAHL, EMBASE, MEDLINE, Veterinary Science Database, Directory of Open Access Journals
  • Page Numbers: pp.2762-2764
  • Keywords: Bosch-Boonstra-Schaaf Optic Atrophy Syndrome, developmental delay, NR2F1, optic atrophy, whole-exome sequencing
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

Bosch-Boonstra-Schaaf optic atrophy syndrome (BBSOAS) is an extremely rare autosomal dominant disorder characterized by intellectual disability, developmental delay, seizures, hypotonia, hearing loss, and optic nerve atrophy. This syndrome is caused by loss-of-function variants in the nuclear receptor subfamily 2 group F member 1 (NR2F1) gene. To date, approximately 80 patients have been reported with BBSOAS. Here, we describe a 3-year-old infant with delayed development, intellectual disability, strabismus, nystagmus, and optic atrophy with well-characterized features associated with BBSOAS. Whole-exome sequencing revealed a novel heterozygous missense mutation (NM_005654.6:c.437G > A, p.Cys146Tyr) in the NR2F1 gene. This missense variant is predicted to be deleterious by the protein prediction tools (SIFT, PolyPhen-2, and MutationTaster). To the best of our knowledge, this is the first patient with BBSOAS reported from Turkey.