De-Suppression of mesenchymal cell identities and variable phenotypic outcomes associated with knockout of Bbs1
Bardet-Biedl syndrome (BBS) is an archetypal ciliopathy caused by dysfunction of primary cilia. BBS affects multiple tissues, including the kidney, eye and hypothalamic satiety response. Understanding pan-tissue mechanisms of pathogenesis versus those which are tissue-specific, as well as gauging th...
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| Main Authors: | , , , , , , , , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
20 November 2023
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| In: |
Cells
Year: 2023, Volume: 12, Issue: 22, Pages: 1-21 |
| ISSN: | 2073-4409 |
| DOI: | 10.3390/cells12222662 |
| Online Access: | Verlag, kostenfrei, Volltext: https://doi.org/10.3390/cells12222662 Verlag, kostenfrei, Volltext: https://www.mdpi.com/2073-4409/12/22/2662 
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| Author Notes: | Grace Mercedes Freke, Tiago Martins, Rosalind Jane Davies, Tina Beyer, Marian Seda, Emma Peskett, Naila Haq, Avishek Prasai, Georg Otto, Jeshmi Jeyabalan Srikaran, Victor Hernandez, Gaurav D. Diwan, Robert B. Russell, Marius Ueffing, Martina Huranova, Karsten Boldt, Philip L. Beales and Dagan Jenkins |
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| 245 | 1 | 0 | |a De-Suppression of mesenchymal cell identities and variable phenotypic outcomes associated with knockout of Bbs1 |c Grace Mercedes Freke, Tiago Martins, Rosalind Jane Davies, Tina Beyer, Marian Seda, Emma Peskett, Naila Haq, Avishek Prasai, Georg Otto, Jeshmi Jeyabalan Srikaran, Victor Hernandez, Gaurav D. Diwan, Robert B. Russell, Marius Ueffing, Martina Huranova, Karsten Boldt, Philip L. Beales and Dagan Jenkins |
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| 520 | |a Bardet-Biedl syndrome (BBS) is an archetypal ciliopathy caused by dysfunction of primary cilia. BBS affects multiple tissues, including the kidney, eye and hypothalamic satiety response. Understanding pan-tissue mechanisms of pathogenesis versus those which are tissue-specific, as well as gauging their associated inter-individual variation owing to genetic background and stochastic processes, is of paramount importance in syndromology. The BBSome is a membrane-trafficking and intraflagellar transport (IFT) adaptor protein complex formed by eight BBS proteins, including BBS1, which is the most commonly mutated gene in BBS. To investigate disease pathogenesis, we generated a series of clonal renal collecting duct IMCD3 cell lines carrying defined biallelic nonsense or frameshift mutations in Bbs1, as well as a panel of matching wild-type CRISPR control clones. Using a phenotypic screen and an unbiased multi-omics approach, we note significant clonal variability for all assays, emphasising the importance of analysing panels of genetically defined clones. Our results suggest that BBS1 is required for the suppression of mesenchymal cell identities as the IMCD3 cell passage number increases. This was associated with a failure to express epithelial cell markers and tight junction formation, which was variable amongst clones. Transcriptomic analysis of hypothalamic preparations from BBS mutant mice, as well as BBS patient fibroblasts, suggested that dysregulation of epithelial-to-mesenchymal transition (EMT) genes is a general predisposing feature of BBS across tissues. Collectively, this work suggests that the dynamic stability of the BBSome is essential for the suppression of mesenchymal cell identities as epithelial cells differentiate. | ||
| 650 | 4 | |a Bardet-Biedl syndrome | |
| 650 | 4 | |a collecting duct cells | |
| 650 | 4 | |a epithelial-to-mesenchymal transition | |
| 650 | 4 | |a fibrosis | |
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| 650 | 4 | |a primary cilia | |
| 650 | 4 | |a Wnt signalling | |
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