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Eggermann, Thomas; Spengler, Sabrina; Venghaus, Andreas; Denecke, Bernd; Zerres, Klaus; Baudis, Michael; Ensenauer, Regina (2012). 2p21 Deletions in hypotonia-cystinuria syndrome. European Journal of Medical Genetics, 55(10):561-563.

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The significant role of the SLC3A1 gene in the aetiology of cystinuria is meanwhile well established and more than 130 point mutations have been reported. With the reports on genomic deletions including at least both SLC3A1 and the neighboured PREPL gene the spectrum of cystinuria mutations and of clinical symptoms could recently be enlarged: patients homozygous for these deletions suffer from a general neonatal hypotonia and growth retardation in addition to cystinuria. The hypotonia in these hypotonia-cystinuria (HCS) patients has been attributed to the total loss of the PREPL protein. Here we report on the clinical course and molecular findings in a HCS patient compound heterozygote for a new deletion in 2p21 and a previously reported deletion, both identified by molecular karyotyping. The diagnostic workup in this patient illustrates the need for a careful clinical examination in context with powerful molecular genetic tools in patients with unusual phenotypes. The identification of unique genomic alterations and their interpretation serves as a prerequisite for the individual counselling of patients and their families. In diagnostic strategies to identify the molecular basis of both cystinuria and hypotonia 2p21 deletions should be considered as the molecular basis of the phenotype.


2 citations in Web of Science®
3 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Molecular Life Sciences
Dewey Decimal Classification:570 Life sciences; biology
Date:17 July 2012
Deposited On:26 Sep 2012 15:44
Last Modified:05 Apr 2016 15:58
Publisher DOI:10.1016/j.ejmg.2012.06.008
PubMed ID:22766003

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