Mutation spectrum of the Norrie disease pseudoglioma (NDP) gene in Indian patients with FEVR

Ganeswara Rao Musada, Subhadra Jalali, Anjli Hussain, Anupama Reddy Chururu, Pramod Reddy Gaddam, Subhabrata Chakrabarti, Inderjeet Kaur

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Purpose: Mutations in the Norrie disease pseudoglioma (NDP; Xp11.3) gene have been involved in retinal blood vessel formation and neural differentiation and are implicated in familial exudative vitreoretinopathy (FEVR) cases. However, the role of the gene has not been explored in the Indian context. Thus, this study was designed to understand the involvement of NDP among Indian patients with FEVR. Methods: The study cohort comprised 225 subjects, including unrelated patients with FEVR (n = 110) and ethnically matched healthy subjects (n = 115) recruited from a tertiary eye care center in India. The entire coding regions, intron–exon boundaries, along with the 5′ and 3′ untranslated regions of NDP were screened with resequencing following standard protocols. The spectrum of the observed variants was analyzed in conjunction with data available from other populations. Results: Eight potentially pathogenic mutations (p.His4ArgfsX21, p.Asp23GlufsX9, p.Ile48ValfsX55, p.His50Asp, p.Ser57*, p.Gly113Asp, p.Arg121Gln, and p.Cys126Arg, including five novel ones), were observed in the coding region of the NDP gene in ten unrelated FEVR probands (9%). The novel changes were not observed in the control subjects and were unavailable in the dbSNP, ESP5400, NIEHS95, and ExAC databases. All probands with NDP mutations exhibited classical features of the disease as observed among patients with FEVR worldwide. Conclusions: This is perhaps the first study to demonstrate the involvement of NDP among patients with Indian FEVR that further expands its mutation spectrum. The data generated could have broad implications in genetic counseling, disease management, and early intervention for a better prognosis in FEVR.

Original languageEnglish (US)
Pages (from-to)491-502
Number of pages12
JournalMolecular vision
StatePublished - May 16 2016
Externally publishedYes

ASJC Scopus subject areas

  • Ophthalmology


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