CTNS mutations in publicly-available human cystinosis cell lines

Mol Genet Metab Rep. 2015 Oct 27:5:63-66. doi: 10.1016/j.ymgmr.2015.10.007. eCollection 2015 Dec.


Patient samples play an important role in the study of inherited metabolic disorders. Open-access biorepositories distribute such samples. Unfortunately, not all clinically-characterized samples come with reliable genotype information. During studies directed toward population frequency assessments of cystinosis, a rare heritable disorder, we sequenced the CTNS gene from 14 cystinosis-related samples obtained from the Coriell Cell Repository. As a result, the disease genotypes of 7 samples were determined for the first time. The reported disease genotypes of 2 additional samples were found to be incorrect. Furthermore, we identified and experimentally confirmed a novel mutation, c.225 + 5G > A, which causes skipping of the 5th exon and is associated with infantile nephropathic cystinosis.

Keywords: CTNS; Coriell Cell Repository; Cystinosis; Mutation; Sequencing; Splicing.