Open AccessNovel mutations in the DGKE gene in two indian patients with early-onset atypical haemolytic uraemic syndrome
Author(s) -
Jyoti Saini Sharma,
Valentine Lobo,
Jyoti Singhal,
Siddharth Anand,
Sandeep Kadam,
Shatakshi Ranade,
Priyanka Gangodkar,
Karthik Ganesan,
Nikhil Phadke,
Meenal Agarwal
Publication year - 2021
Publication title -
indian journal of nephrology/indian journal of nephrology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.317
H-Index - 24
eISSN - 1998-3662
pISSN - 0971-4065
DOI - 10.4103/ijn.ijn_336_19
Subject(s) - copy number variation , gene , medicine , genetics , atypical hemolytic uremic syndrome , dna sequencing , genomic dna , mutation , bioinformatics , biology , genome , antibody , complement system
Atypical haemolytic uremic syndrome (aHUS) is a clinically and genetically heterogeneous condition caused by a complex interplay between genomic susceptibility factors and environmental influences. Pathogenic variants in the DGKE gene are recently identified in cases with infantile-onset autosomal recessive aHUS. The presence of low serum C3 levels, however, has rarely been described in cases of DGKE -associated aHUS. Molecular genetic testing was performed by a commercial next-generation sequencing (NGS) panel as well and by an in-house developed targeted NGS for DGKE gene. Copy number variations (CNVs) were computed from NGS data by calculating a normalised copy number ratio of aligned number of reads at targeted genomic regions against multiple reference regions of the same sample and multiple controls. We report here two such novel clinically relevant variants (c.727_730delTTGT and c.251_259delGCGCCTTC) in the DGKE gene, in two families of infantile aHUS with low serum C3 levels.