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| Status |
Public on May 26, 2021 |
| Title |
Genetic compensation for cilia defects in cep290/NPHP6 mutants by upregulation of cilia-associated small GTPases |
| Organism |
Danio rerio |
| Experiment type |
Expression profiling by high throughput sequencing
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| Summary |
Mutations in CEP290, a large multidomain coiled coil protein, are associated with multiple cilia-associated syndromes. Over 130 CEP290 mutations have been linked to a wide spectrum of human ciliopathies, raising the question of how mutations in a single gene cause different disease syndromes. In zebrafish the expressivity of cep290 deficiencies were linked to the type of genetic ablation: acute cep290 morpholino knockdown caused severe cilia-related phenotypes while defects in a Crispr/Cas9 genetic mutant were restricted to photoreceptor defects. Here we show that milder phenotypes in genetic mutants were associated with upregulation of genes encoding the cilia-associated small GTPases arl3, arl13b, and unc119b. Upregulation of UNC119b was also observed in urine-derived renal epithelial cells from human JBTS CEP290 patients. Ectopic expression of arl3, arl13b and unc119b in cep290 morphant zebrafish embryos rescued Kupffer's vesicle cilia and partially rescued photoreceptor outer segment defects. The results suggest that genetic compensation by upregulation of genes involved in a common subcellular process, lipidated protein trafficking to cilia, may be a conserved mechanism contributing to genotype-phenotype variations observed in CEP290 deficiencies.
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| Overall design |
RNA from 72hpf zebrafish embryos was analyzed. Each sample consisted of pools of 30 embryos from cep290 morphants, maternal zygotic mutants or wildtype embryos. Biological triplicates were done.
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| Contributor(s) |
Cardenas-Rodriguez M, Austin-Tse C, Bergboer JG, Molinari E, Sugano Y, Bachmann-Gagescu R, Sayer JA, Drummond IA |
| Citation(s) |
34155518 |
| Submission date |
May 25, 2021 |
| Last update date |
Aug 17, 2021 |
| Contact name |
Iain A Drummond |
| E-mail(s) |
idrummond@mdibl.org
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| Phone |
207 288 9880
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| Organization name |
Mount Desert Island Biological Laboratory
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| Department |
Davis Center for Regenerative Biology and Aging
|
| Street address |
159 Old Bar Harbor Road Bar Harbor
|
| City |
Bar Harbor |
| State/province |
Maine |
| ZIP/Postal code |
04609 |
| Country |
USA |
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| Platforms (1) |
| GPL14875 |
Illumina HiSeq 2000 (Danio rerio) |
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| Samples (9)
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| Relations |
| BioProject |
PRJNA732587 |
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