Helmholtz Gemeinschaft


Ultra-rapid emergency genomic diagnosis of Donahue syndrome in a preterm infant within 17 hours

PDF (Original Article) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader

Item Type:Article
Title:Ultra-rapid emergency genomic diagnosis of Donahue syndrome in a preterm infant within 17 hours
Creators Name:Bamborschke, D. and Özdemir, Ö. and Kreutzer, M. and Motameny, S. and Thiele, H. and Kribs, A. and Dötsch, J. and Altmüller, J. and Nürnberg, P. and Cirak, S.
Abstract:Genetic diseases are a major cause of neonatal morbidity and mortality. The clinical differential diagnosis in severely ill neonates, especially in premature infants, is challenging. Next generation sequencing (NGS) diagnostics is a valuable tool, but the turnaround time is often too long to provide a diagnosis in the time needed for clinical guidance in newborn intensive care units (NICU). To minimize turnaround time, we developed an ultra-rapid whole genome sequencing pipeline and tested it in clinical practice. Our pilot case, was a preterm infant presenting with several crises of dehydration, hypoglycaemia and hyponatremia together with nephrocalcinosis and hypertrophic cardiomyopathy. Whole genome sequencing was performed using a paired-end 2x75bp protocol. Sequencing data were exported after 50 sequencing cycles for a first analysis. After run completion, the rapid-sequencing protocol, a second analysis of the 2 x 75 paired-end run was performed. Both analyses comprised read-mapping and SNP-/indel calling on an on-site Edico Genome DRAGEN server, followed by functional annotation and pathogenicity prediction using in-house scripts. After the first analysis within 17 h, the emergency ultra-rapid protocol identified two novel compound heterozygous variants in the insulin receptor gene (INSR), pathogenic variants in which cause Donohue Syndrome. The genetic diagnosis could be confirmed by detection of hyperinsulinism and patient care adjusted. Nonetheless, we decided to pursue RNA studies, proving the functional effect of the novel splice variant and reduced expression levels of INSR in patients skin fibroblasts.
Keywords:Donohue Syndrome, Emergency Genomics, Hyperinsulinism, INSR, Ultra-Rapid Genome Sequencing
Source:American Journal of Medical Genetics A
Page Range:90-96
Date:January 2021
Official Publication:https://doi.org/10.1002/ajmg.a.61917
PubMed:View item in PubMed

Repository Staff Only: item control page


Downloads per month over past year

Open Access
MDC Library