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UPF1 silenced cellular model systems for screening of read-through agents active on β039 thalassemia point mutation

Author:
Salvatori, Francesca, Pappadà, Mariangela, Breveglieri, Giulia, D’Aversa, Elisabetta, Finotti, Alessia, Lampronti, Ilaria, Gambari, Roberto, Borgatti, Monica
Source:
BMC biotechnology 2018 v.18 no.1 pp. 28
ISSN:
1472-6750
Subject:
aminoglycoside antibiotics, glutamine, humans, messenger RNA, models, nonsense mutation, point mutation, screening, stop codon, thalassemia, therapeutics, translation (genetics)
Abstract:
BACKGROUND: Nonsense mutations promote premature translational termination, introducing stop codons within the coding region of mRNAs and causing inherited diseases, including thalassemia. For instance, in β⁰39 thalassemia the CAG (glutamine) codon is mutated to the UAG stop codon, leading to premature translation termination and to mRNA destabilization through the well described NMD (nonsense-mediated mRNA decay). In order to develop an approach facilitating translation and, therefore, protection from NMD, ribosomal read-through molecules, such as aminoglycoside antibiotics, have been tested on mRNAs carrying premature stop codons. These findings have introduced new hopes for the development of a pharmacological approach to the β⁰39 thalassemia therapy. While several strategies, designed to enhance translational read-through, have been reported to inhibit NMD efficiency concomitantly, experimental tools for systematic analysis of mammalian NMD inhibition by translational read-through are lacking. RESULTS: We developed a human cellular model of the β⁰39 thalassemia mutation with UPF-1 suppressed and showing a partial NMD suppression. CONCLUSIONS: This novel cellular model could be used for the screening of molecules exhibiting preferential read-through activity allowing a great rescue of the mutated transcripts.
Agid:
5946761