Title: Analysis of CTNS gene transcripts in nephropathic cystinosis
Authors: Taranta, Anna ×
Wilmer, Martijn J
van den Heuvel, Lambertus
Bencivenga, Paola
Bellomo, Francesco
Levtchenko, Elena
Emma, Francesco #
Issue Date: Jul-2010
Publisher: Springer International
Series Title: Pediatric Nephrology vol:25 issue:7 pages:1263-1267
Abstract: Nephropathic cystinosis (NC) is an autosomal recessive disorder caused by mutations of the CTNS gene that encodes for a cystine transmembrane transporter. Several mutations have been described in the coding and promoter regions of the CTNS gene in affected individuals. We selected three patients with NC from two unrelated families, in whom sequence analysis of the CTNS gene detected only one or no mutations. Total RNA was isolated from peripheral blood mononuclear cells or fibroblasts and CTNS transcripts were analyzed. We observed a skipping of exon 5 (85 bp) in two siblings and an intron 9 retention of 75 bp associated with partial replication of exon 9 in the third patient. Genomic DNA analysis of intron regions surrounding exon 5 showed a point mutation in the hypothetical lariat branch site of intron 4 at position -24 (c.141-24 T > C) in the first two patients and a duplication of 266 bp including a part of exon and intron 9 in the third patient. Analysis of CTNS gene transcripts allowed identification of mutations in patients in whom CTNS mutations could not be detected by traditional DNA sequencing. These results support the hypothesis that cystinosis is a monogenic disorder.
ISSN: 0931-041X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Section Child - Miscellaneous (-)
Pediatric Nephrology Section (-)
Faculty of Science - miscellaneous
× corresponding author
# (joint) last author

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