Projects per year
Abstract
Background: Mutations in the human crumbs homologue 1 (CRB1) gene are associated with a spectrum of inherited retinal diseases. However, functional studies demonstrating the impact of individual CRB1 mutations on gene expression are lacking for most variants. Here, we investigated the effect of two CRB1 variants on pre-mRNA splicing using neural retinal organoids (NRO) derived from a patient with recessive rod-cone dystrophy caused by compound heterozygous mutations in CRB1 (c.1892A>G and c.2548G>A). Methods: The patient received ophthalmological examinations including multimodal imaging. NRO were differentiated from induced pluripotent stem cells (iPSCs) derived from the patient and a control subject. CRB1 transcripts were characterized by RT-PCR and Sanger sequencing. Results: The Patient displayed retinal thickening with disorganization of retinal layers and preservation of para-arteriolar retinal pigment epithelium. Both patient and control iPSC produced NRO containing photoreceptor progenitor cells expressing CRB1 mRNA. Patient NRO expressed a novel CRB1 transcript displaying skipping of exon 6. CRB1 transcripts containing the c.2548G>A substitution in exon 7 were expressed in patient NRO. Conclusions: Together, these results confirm the pathogenicity of the c.1892A>G and c.2548G>A CRB1 variants in a family with recessive adult-onset rod-cone dystrophy and further demonstrate the effects of these variants on pre-mRNA splicing. This data provide important insights into the pathogenic mechanisms associated with these variants.
Original language | English |
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Article number | e1489 |
Journal | Molecular Genetics and Genomic Medicine |
Volume | 8 |
Issue number | 11 |
DOIs | |
Publication status | Published - Nov 2020 |
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Dive into the research topics of 'Characterization of CRB1 splicing in retinal organoids derived from a patient with adult-onset rod-cone dystrophy caused by the c.1892A>G and c.2548G>A variants'. Together they form a unique fingerprint.Projects
- 3 Finished
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Accelerating the identification and treatment of splice-altering mutations underlying inherited retinal diseases
Chen, F. (Investigator 01), Fletcher, S. (Investigator 02), McLenachan, S. (Investigator 03) & Cunningham, P. (Investigator 04)
NHMRC National Health and Medical Research Council
1/01/20 → 31/12/24
Project: Research
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MRFF - Developing Personalised Treatment for Retinal Degeneration
Chen, F. (Investigator 01)
NHMRC National Health and Medical Research Council
1/01/18 → 31/12/21
Project: Research
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From discovery to therapy in genetic eye diseases
Mackey, D. (Investigator 01), Craig, J. (Investigator 02), Hewitt, A. (Investigator 03), Burdon, K. (Investigator 04), Jamieson, R. (Investigator 05), Grigg, J. (Investigator 06), MacGregor, S. (Investigator 07), Chen, F. (Investigator 08), Otlowski, M. (Investigator 09) & Schofield, D. (Investigator 10)
NHMRC National Health and Medical Research Council
1/01/16 → 31/12/20
Project: Research