Copy-number disorders are a common cause of congenital kidney malformations

Sanna-Cherchi, S. et al. (2012) Copy-number disorders are a common cause of congenital kidney malformations. American Journal of Human Genetics, 91(6), pp. 987-997. (doi: 10.1016/j.ajhg.2012.10.007)

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We examined the burden of large, rare, copy-number variants (CNVs) in 192 individuals with renal hypodysplasia (RHD) and replicated findings in 330 RHD cases from two independent cohorts. CNV distribution was significantly skewed toward larger gene-disrupting events in RHD cases compared to 4,733 ethnicity-matched controls (p = 4.8 × 10−11). This excess was attributable to known and novel (i.e., not present in any database or in the literature) genomic disorders. All together, 55/522 (10.5%) RHD cases harbored 34 distinct known genomic disorders, which were detected in only 0.2% of 13,839 population controls (p = 1.2 × 10−58). Another 32 (6.1%) RHD cases harbored large gene-disrupting CNVs that were absent from or extremely rare in the 13,839 population controls, identifying 38 potential novel or rare genomic disorders for this trait. Deletions at the HNF1B locus and the DiGeorge/velocardiofacial locus were most frequent. However, the majority of disorders were detected in a single individual. Genomic disorders were detected in 22.5% of individuals with multiple malformations and 14.5% of individuals with isolated urinary-tract defects; 14 individuals harbored two or more diagnostic or rare CNVs. Strikingly, the majority of the known CNV disorders detected in the RHD cohort have previous associations with developmental delay or neuropsychiatric diseases. Up to 16.6% of individuals with kidney malformations had a molecular diagnosis attributable to a copy-number disorder, suggesting kidney malformations as a sentinel manifestation of pathogenic genomic imbalances. A search for pathogenic CNVs should be considered in this population for the diagnosis of their specific genomic disorders and for the evaluation of the potential for developmental delay.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Padmanabhan, Professor Sandosh and Dominiczak, Professor Anna
Authors: Sanna-Cherchi, S., Kiryluk, K., Burgess, K.E., Bodria, M., Sampson, M.G., Hadley, D., Nees, S.N., Verbitsky, M., Perry, B.J., Sterken, R., Lozanovski, V.J., Materna-Kiryluk, A., Barlassina, C., Kini, A., Corbani, V., Carrea, A., Somenzi, D., Murtas, C., Ristoska-Bojkovska, N., Izzi, C., Bianco, B., Zaniew, M., Flogelova, H., Weng, P.L., Kacak, N., Giberti, S., Gigante, M., Arapovic, A., Drnasin, K., Caridi, G., Curioni, S., Allegri, F., Ammenti, A., Ferretti, S., Goj, V., Bernardo, L., Jobanputra, V., Chung, W.K., Lifton, R.P., Sanders, S., State, M., Clark, L.N., Saraga, M., Padmanabhan, S., Dominiczak, A.F., Foroud, T., Gesualdo, L., Gucev, Z., Allegri, L., Latos-Bielenska, A., Cusi, D., Scolari, F., Tasic, V., Hakonarson, H., Ghiggeri, G.M., and Gharavi, A.G.
College/School:College of Medical Veterinary and Life Sciences > School of Cardiovascular & Metabolic Health
Journal Name:American Journal of Human Genetics
Journal Abbr.:AJHG
ISSN (Online):1537-6605

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
464051Genomics and proteomics of hypertension and its vascular complications: the pathwayomic strategies.Anna DominiczakBritish Heart Foundation (BHF)RG/07/005/23633RI CARDIOVASCULAR & MEDICAL SCIENCES
483571Collaborative strategy for a definitive genome scan in essential hypertension: high fidelity phenotyping and "hypercontrols"Anna DominiczakBritish Heart Foundation (BHF)SP/08/005/25115RI CARDIOVASCULAR & MEDICAL SCIENCES