Centriolar satellites expedite mother centriole remodeling to promote ciliogenesis
Abstract
Centrosomes are orbited by centriolar satellites, dynamic multiprotein assemblies nucleated by Pericentriolar Material 1 (PCM1). To study the requirement for centriolar satellites, we generated mice lacking PCM1, a crucial component of satellites. Pcm1-/- mice display partially penetrant perinatal lethality with survivors exhibiting hydrocephalus, oligospermia and cerebellar hypoplasia, and variably expressive phenotypes such as hydronephrosis. As many of these phenotypes have been observed in human ciliopathies and satellites are implicated in cilia biology, we investigated whether cilia were affected. PCM1 was dispensable for ciliogenesis in many cell types, whereas Pcm1-/- multiciliated ependymal cells and human PCM1-/- retinal pigmented epithelial 1 (RPE1) cells showed reduced ciliogenesis. PCM1-/- RPE1 cells displayed reduced docking of the mother centriole to the ciliary vesicle and removal of CP110 and CEP97 from the distal mother centriole, indicating compromised early ciliogenesis. Similarly, Pcm1-/- ependymal cells exhibited reduced removal of CP110 from basal bodies in vivo. We propose that PCM1 and centriolar satellites facilitate efficient trafficking of proteins to and from centrioles, including the departure of CP110 and CEP97 to initiate ciliogenesis, and that the threshold to trigger ciliogenesis differs between cell types.
Data availability
Proteomics data files are be uploaded ProteomeXchange (Identifier: PXD031920), with the accession number is available with the paper.All analysis tools have been made available on GitHub (https://github.com/IGC-Advanced-Imaging-Resource/Hall2022_Paper), as described in Materials and Methods.
Article and author information
Author details
Funding
Medical Research Council (MR_UU_1201018/26)
- Emma A Hall
- Dhivya Kumar
- Patricia L Yeyati
- Lorraine Rose
- Lisa McKie
- Daniel O Dodd
- Peter A Tennant
- Roly Megaw
- Laura C Murphy
- Marisa F Ferreira
- Graeme Grimes
- Lucy Williams
- Tooba Quidwai
- Pleasantine Mill
Sandler Foundation
- Dhivya Kumar
Krembil Foundation
- Suzanna L Prosser
- Laurence Pelletier
European Commission (866355)
- Emma A Hall
- Daniel O Dodd
- Pleasantine Mill
Canadian Institutes of Health Research (167279)
- Suzanna L Prosser
- Laurence Pelletier
European Commission (702601)
- Suzanna L Prosser
National Institutes of Health (R01GM095941)
- Dhivya Kumar
- Vicente Herranz-Pérez
- Jose Manuel GarcÃa-Verdugo
- Jeremy F Reiter
National Institutes of Health (R01AR054396)
- Dhivya Kumar
- Vicente Herranz-Pérez
- Jose Manuel GarcÃa-Verdugo
- Jeremy F Reiter
National Institutes of Health (RO1HD089918)
- Dhivya Kumar
- Vicente Herranz-Pérez
- Jose Manuel GarcÃa-Verdugo
- Jeremy F Reiter
National Institutes of Health (5K99GM140175)
- Dhivya Kumar
Jane Coffin Childs Memorial Fund for Medical Research
- Dhivya Kumar
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Reviewing Editor
- Lotte B Pedersen, University of Copenhagen, Denmark
Ethics
Animal experimentation: Animals were maintained in SPF environment and studies carried out in accordance with the guidance issued by the Medical Research Council in "Responsibility in the Use of Animals in Medical Research" (July 1993) and licensed by the Home Office under the Animals (Scientific Procedures) Act 1986 under project license number P18921CDE in facilities at the University of Edinburgh (PEL 60/6025).
Version history
- Preprint posted: April 4, 2022 (view preprint)
- Received: April 6, 2022
- Accepted: February 14, 2023
- Accepted Manuscript published: February 15, 2023 (version 1)
- Version of Record published: March 9, 2023 (version 2)
Copyright
© 2023, Hall et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
Metrics
-
- 2,607
- views
-
- 492
- downloads
-
- 10
- citations
Views, downloads and citations are aggregated across all versions of this paper published by eLife.
Download links
Downloads (link to download the article as PDF)
Open citations (links to open the citations from this article in various online reference manager services)
Cite this article (links to download the citations from this article in formats compatible with various reference manager tools)
Further reading
-
- Cell Biology
- Neuroscience
Multicellular organisms are composed of specialized cell types with distinct proteomes. While recent advances in single-cell transcriptome analyses have revealed differential expression of mRNAs, cellular diversity in translational profiles remains underinvestigated. By performing RNA-seq and Ribo-seq in genetically defined cells in the Drosophila brain, we here revealed substantial post-transcriptional regulations that augment the cell-type distinctions at the level of protein expression. Specifically, we found that translational efficiency of proteins fundamental to neuronal functions, such as ion channels and neurotransmitter receptors, was maintained low in glia, leading to their preferential translation in neurons. Notably, distribution of ribosome footprints on these mRNAs exhibited a remarkable bias toward the 5′ leaders in glia. Using transgenic reporter strains, we provide evidence that the small upstream open-reading frames in the 5’ leader confer selective translational suppression in glia. Overall, these findings underscore the profound impact of translational regulation in shaping the proteomics for cell-type distinction and provide new insights into the molecular mechanisms driving cell-type diversity.
-
- Cancer Biology
- Cell Biology
Immune checkpoint inhibitors have produced encouraging results in cancer patients. However, the majority of ß-catenin-mutated tumors have been described as lacking immune infiltrates and resistant to immunotherapy. The mechanisms by which oncogenic ß-catenin affects immune surveillance remain unclear. Herein, we highlighted the involvement of ß-catenin in the regulation of the exosomal pathway and, by extension, in immune/cancer cell communication in hepatocellular carcinoma (HCC). We showed that mutated ß-catenin represses expression of SDC4 and RAB27A, two main actors in exosome biogenesis, in both liver cancer cell lines and HCC patient samples. Using nanoparticle tracking analysis and live-cell imaging, we further demonstrated that activated ß-catenin represses exosome release. Then, we demonstrated in 3D spheroid models that activation of β-catenin promotes a decrease in immune cell infiltration through a defect in exosome secretion. Taken together, our results provide the first evidence that oncogenic ß-catenin plays a key role in exosome biogenesis. Our study gives new insight into the impact of ß-catenin mutations on tumor microenvironment remodeling, which could lead to the development of new strategies to enhance immunotherapeutic response.