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Wei C, Zhang H, Fu M, Ye J, Yao B. Novel compound heterozygous variants in the CSPP1 gene causes Joubert syndrome: case report and literature review of the CSPP1 gene's pathogenic mechanism. Front Pediatr 2024; 12:1305754. [PMID: 38586154 PMCID: PMC10995352 DOI: 10.3389/fped.2024.1305754] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Accepted: 03/04/2024] [Indexed: 04/09/2024] Open
Abstract
Joubert syndrome (JS) is a rare autosomal recessive neurodevelopmental condition characterized by congenital mid-hindbrain abnormalities and a variety of clinical manifestations. This article describes a case of Joubert syndrome type 21 with microcephaly, seizures, developmental delay and language regression, caused by a CSPP1 gene variant and examines the contributing variables. This paper advances the understanding of JS by summarizing the literature and offering detection patterns for practitioners with clinical suspicions of JS.
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Affiliation(s)
| | | | | | - Jingping Ye
- Department of Pediatrics, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
| | - Baozhen Yao
- Department of Pediatrics, Renmin Hospital of Wuhan University, Wuhan, Hubei, China
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Abstract
Primary cilia play a key role in the ability of cells to respond to extracellular stimuli, such as signaling molecules and environmental cues. These sensory organelles are crucial to the development of many organ systems, and defects in primary ciliogenesis lead to multisystemic genetic disorders, known as ciliopathies. Here, we review recent advances in the understanding of several key aspects of the regulation of ciliogenesis. Primary ciliogenesis is thought to take different pathways depending on cell type, and some recent studies shed new light on the cell-type-specific mechanisms regulating ciliogenesis at the apical surface in polarized epithelial cells, which are particularly relevant for many ciliopathies. Furthermore, recent findings have demonstrated the importance of actin cytoskeleton dynamics in positively and negatively regulating multiple stages of ciliogenesis, including the vesicular trafficking of ciliary components and the positioning and docking of the basal body. Finally, studies on the formation of motile cilia in multiciliated epithelial cells have revealed requirements for actin remodeling in this process too, as well as showing evidence of an additional alternative ciliogenesis pathway.
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Affiliation(s)
- Huxley K Hoffman
- Department of Cell and Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Rytis Prekeris
- Department of Cell and Developmental Biology, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
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Mansour F, Boivin FJ, Shaheed IB, Schueler M, Schmidt-Ott KM. The Role of Centrosome Distal Appendage Proteins (DAPs) in Nephronophthisis and Ciliogenesis. Int J Mol Sci 2021; 22:ijms222212253. [PMID: 34830133 PMCID: PMC8621283 DOI: 10.3390/ijms222212253] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Revised: 11/08/2021] [Accepted: 11/10/2021] [Indexed: 02/06/2023] Open
Abstract
The primary cilium is found in most mammalian cells and plays a functional role in tissue homeostasis and organ development by modulating key signaling pathways. Ciliopathies are a group of genetically heterogeneous disorders resulting from defects in cilia development and function. Patients with ciliopathic disorders exhibit a range of phenotypes that include nephronophthisis (NPHP), a progressive tubulointerstitial kidney disease that commonly results in end-stage renal disease (ESRD). In recent years, distal appendages (DAPs), which radially project from the distal end of the mother centriole, have been shown to play a vital role in primary ciliary vesicle docking and the initiation of ciliogenesis. Mutations in the genes encoding these proteins can result in either a complete loss of the primary cilium, abnormal ciliary formation, or defective ciliary signaling. DAPs deficiency in humans or mice commonly results in NPHP. In this review, we outline recent advances in our understanding of the molecular functions of DAPs and how they participate in nephronophthisis development.
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Affiliation(s)
- Fatma Mansour
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany; (F.M.); (F.J.B.)
- Molecular and Translational Kidney Research, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), 13125 Berlin, Germany
- Department of Pathology, Faculty of Veterinary Medicine, Cairo University, 12613 Giza, Egypt;
| | - Felix J. Boivin
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany; (F.M.); (F.J.B.)
- Molecular and Translational Kidney Research, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), 13125 Berlin, Germany
| | - Iman B. Shaheed
- Department of Pathology, Faculty of Veterinary Medicine, Cairo University, 12613 Giza, Egypt;
| | - Markus Schueler
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany; (F.M.); (F.J.B.)
- Correspondence: (M.S.); (K.M.S.-O.)
| | - Kai M. Schmidt-Ott
- Department of Nephrology and Medical Intensive Care, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany; (F.M.); (F.J.B.)
- Molecular and Translational Kidney Research, Max-Delbrück-Center for Molecular Medicine in the Helmholtz Association (MDC), 13125 Berlin, Germany
- Correspondence: (M.S.); (K.M.S.-O.)
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The Transition Zone Protein AHI1 Regulates Neuronal Ciliary Trafficking of MCHR1 and Its Downstream Signaling Pathway. J Neurosci 2021; 41:3932-3943. [PMID: 33741721 DOI: 10.1523/jneurosci.2993-20.2021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2020] [Revised: 02/25/2021] [Accepted: 03/10/2021] [Indexed: 11/21/2022] Open
Abstract
The Abelson-helper integration site 1 (AHI1) gene encodes for a ciliary transition zone localizing protein that when mutated causes the human ciliopathy, Joubert syndrome. We prepared and examined neuronal cultures derived from male and female embryonic Ahi1 +/+ and Ahi1 -/- mice (littermates) and found that the distribution of ciliary melanin-concentrating hormone receptor-1 (MchR1) was significantly reduced in Ahi1 -/- neurons; however, the total and surface expression of MchR1 on Ahi1 -/- neurons was similar to controls (Ahi1 +/+). This indicates that a pathway for MchR1 trafficking to the surface plasma membrane is intact, but the process of targeting MchR1 into cilia is impaired in Ahi1-deficient mouse neurons, indicating a role for Ahi1 in localizing MchR1 to the cilium. Mouse Ahi1 -/- neurons that fail to accumulate MchR1 in the ciliary membrane have significant decreases in two downstream MchR1 signaling pathways [cAMP and extracellular signal-regulated kinase (Erk)] on MCH stimulation. These results suggest that the ciliary localization of MchR1 is necessary and critical for MchR1 signaling, with Ahi1 participating in regulating MchR1 localization to cilia, and further supporting cilia as critical signaling centers in neurons.SIGNIFICANCE STATEMENT Our work here demonstrates that neuronal primary cilia are powerful and focused signaling centers for the G-protein-coupled receptor (GPCR), melanin-concentrating hormone receptor-1 (MCHR1), with a role for the ciliary transition zone protein, Abelson-helper integration site 1 (AHI1), in mediating ciliary trafficking of MCHR1. Moreover, our manuscript further expands the repertoire of cilia functions on neurons, a cell type that has not received significant attention in the cilia field. Lastly, our work demonstrates the significant influence of ciliary GPCR signaling in the overall signaling of neurons.
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Yang H, Huang K. Dissecting the Vesicular Trafficking Function of IFT Subunits. Front Cell Dev Biol 2020; 7:352. [PMID: 32010685 PMCID: PMC6974671 DOI: 10.3389/fcell.2019.00352] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2019] [Accepted: 12/05/2019] [Indexed: 12/22/2022] Open
Abstract
Intraflagellar transport (IFT) was initially identified as a transport machine with multiple protein subunits, and it is essential for the assembly, disassembly, and maintenance of cilium/flagellum, which serves as the nexus of extracellular-to-intracellular signal integration. To date, in addition to its well-established and indispensable roles in ciliated cells, most IFT subunits have presented more general functions of vesicular trafficking in the non-ciliated cells. Thus, this review aims to summarize the recent progress on the vesicular trafficking functions of the IFT subunits and to highlight the issues that may arise in future research.
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Affiliation(s)
- Huihui Yang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China.,Institute of Hydrobiology, University of Chinese Academy of Sciences, Beijing, China
| | - Kaiyao Huang
- Key Laboratory of Algal Biology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, China
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Pruski M, Hu L, Yang C, Wang Y, Zhang JB, Zhang L, Huang Y, Rajnicek AM, St Clair D, McCaig CD, Lang B, Ding YQ. Roles for IFT172 and Primary Cilia in Cell Migration, Cell Division, and Neocortex Development. Front Cell Dev Biol 2019; 7:287. [PMID: 31850339 PMCID: PMC6890611 DOI: 10.3389/fcell.2019.00287] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 11/04/2019] [Indexed: 12/25/2022] Open
Abstract
The cilium of a cell translates varied extracellular cues into intracellular signals that control embryonic development and organ function. The dynamic maintenance of ciliary structure and function requires balanced bidirectional cargo transport involving intraflagellar transport (IFT) complexes. IFT172 is a member of the IFT complex B, and IFT172 mutation is associated with pathologies including short rib thoracic dysplasia, retinitis pigmentosa and Bardet-Biedl syndrome, but how it underpins these conditions is not clear. We used the WIM cell line, derived from embryonic fibroblasts of Wimple mice (carrying homozygous Leu1564Pro mutation in Ift172), to probe roles of Ift172 and primary cilia in cell behavior. WIM cells had ablated cilia and deficiencies in directed migration (electrotaxis), cell proliferation and intracellular signaling. Additionally, WIM cells displayed altered cell cycle progression, with increased numbers of chromatids, highlighting dysfunctional centrosome status. Exposure to a physiological electric field promoted a higher percentage of primary cilia in wild-type cells. Interestingly, in situ hybridization revealed an extensive and dynamic expression profile of Ift172 in both developing and adult mouse cortex. In vivo manipulation of Ift172 expression in germinal regions of embryonic mouse brains perturbed neural progenitor proliferation and radial migration of post-mitotic neurons, revealing a regulatory role of Ift172 in cerebral morphogenesis. Our data suggest that Ift172 regulates a range of fundamental biological processes, highlighting the pivotal roles of the primary cilium in cell physiology and brain development.
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Affiliation(s)
- Michal Pruski
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Mental Disorders, Changsha, China.,State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, China.,Key Laboratory of Arrhythmias, Ministry of Education, East Hospital, Department of Anatomy and Neurobiology, Collaborative Innovation Centre for Brain Science, Tongji University School of Medicine, Shanghai, China.,School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Ling Hu
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, China.,School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Cuiping Yang
- Key Laboratory of Arrhythmias, Ministry of Education, East Hospital, Department of Anatomy and Neurobiology, Collaborative Innovation Centre for Brain Science, Tongji University School of Medicine, Shanghai, China
| | - Yubing Wang
- Key Laboratory of Arrhythmias, Ministry of Education, East Hospital, Department of Anatomy and Neurobiology, Collaborative Innovation Centre for Brain Science, Tongji University School of Medicine, Shanghai, China
| | - Jin-Bao Zhang
- Department of Histology and Embryology, Institute of Neuroscience, Wenzhou Medical University, Wenzhou, China
| | - Lei Zhang
- Key Laboratory of Arrhythmias, Ministry of Education, East Hospital, Department of Anatomy and Neurobiology, Collaborative Innovation Centre for Brain Science, Tongji University School of Medicine, Shanghai, China.,School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Ying Huang
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, China.,Key Laboratory of Arrhythmias, Ministry of Education, East Hospital, Department of Anatomy and Neurobiology, Collaborative Innovation Centre for Brain Science, Tongji University School of Medicine, Shanghai, China.,School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Ann M Rajnicek
- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - David St Clair
- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Colin D McCaig
- School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Bing Lang
- Department of Psychiatry, The Second Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Mental Disorders, Changsha, China.,School of Medicine, Medical Sciences and Nutrition, Institute of Medical Sciences, University of Aberdeen, Aberdeen, United Kingdom
| | - Yu-Qiang Ding
- State Key Laboratory of Medical Neurobiology and MOE Frontiers Center for Brain Science, Institutes of Brain Science, Fudan University, Shanghai, China.,Key Laboratory of Arrhythmias, Ministry of Education, East Hospital, Department of Anatomy and Neurobiology, Collaborative Innovation Centre for Brain Science, Tongji University School of Medicine, Shanghai, China
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7
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Casalou C, Faustino A, Silva F, Ferreira IC, Vaqueirinho D, Ferreira A, Castanheira P, Barona T, Ramalho JS, Serpa J, Félix A, Barral DC. Arl13b Regulates Breast Cancer Cell Migration and Invasion by Controlling Integrin-Mediated Signaling. Cancers (Basel) 2019; 11:cancers11101461. [PMID: 31569511 PMCID: PMC6826833 DOI: 10.3390/cancers11101461] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2019] [Revised: 09/13/2019] [Accepted: 09/26/2019] [Indexed: 12/24/2022] Open
Abstract
Breast cancer is the first cause of cancer-related mortality among women worldwide, according to the most recent estimates. This mortality is mainly caused by the tumors' ability to form metastases. Cancer cell migration and invasion are essential for metastasis and rely on the interplay between actin cytoskeleton remodeling and cell adhesion. Therefore, understanding the mechanisms by which cancer cell invasion is controlled may provide new strategies to impair cancer progression. We investigated the role of the ADP-ribosylation factor (Arf)-like (Arl) protein Arl13b in breast cancer cell migration and invasion in vitro, using breast cancer cell lines and in vivo, using mouse orthotopic models. We show that Arl13b silencing inhibits breast cancer cell migration and invasion in vitro, as well as cancer progression in vivo. We also observed that Arl13b is upregulated in breast cancer cell lines and patient tissue samples. Moreover, we found that Arl13b localizes to focal adhesions (FAs) and interacts with β3-integrin. Upon Arl13b silencing, β3-integrin cell surface levels and FA size are increased and integrin-mediated signaling is inhibited. Therefore, we uncover a role for Arl13b in breast cancer cell migration and invasion and provide a new mechanism for how ARL13B can function as an oncogene, through the modulation of integrin-mediated signaling.
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Affiliation(s)
- Cristina Casalou
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
| | - Alexandra Faustino
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
- ProRegeM-PhD Program in Mechanisms of Disease and Regenerative Medicine, 1169-056 Lisboa, Portugal.
| | - Fernanda Silva
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
- Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG), 1099-023 Lisboa, Portugal.
| | - Inês C Ferreira
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
| | - Daniela Vaqueirinho
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
- Institute for Research in Biomedicine, CH-6500 Bellinzona, Switzerland.
| | - Andreia Ferreira
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
| | - Pedro Castanheira
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
- ProRegeM-PhD Program in Mechanisms of Disease and Regenerative Medicine, 1169-056 Lisboa, Portugal.
| | - Teresa Barona
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
| | - José S Ramalho
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
| | - Jacinta Serpa
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
- Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG), 1099-023 Lisboa, Portugal.
| | - Ana Félix
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
- Instituto Português de Oncologia de Lisboa Francisco Gentil (IPOLFG), 1099-023 Lisboa, Portugal.
| | - Duarte C Barral
- CEDOC, NOVA Medical School| Faculdade de Ciências Médicas, Universidade NOVA de Lisboa, 1150-82 Lisboa, Portugal.
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Loss of the neurodevelopmental Joubert syndrome causing protein, Ahi1, causes motor and muscle development delays independent of central nervous system involvement. Dev Biol 2019; 448:36-47. [PMID: 30695685 DOI: 10.1016/j.ydbio.2019.01.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 01/25/2019] [Accepted: 01/25/2019] [Indexed: 12/15/2022]
Abstract
Joubert syndrome (JBTS) is a predominantly autosomal recessive neurodevelopmental disorder that presents with characteristic malformations of the cerebellar vermis, superior cerebellar peduncles and midbrain in humans. Accompanying these malformations are a heterogeneous set of clinical symptoms, which frequently include deficits in motor and muscle function, such as hypotonia (low muscle tone) and ataxia (clumsiness). These symptoms are attributed to improper development of the hindbrain, but no direct evidence has been reported linking these in JBTS. Here, we describe muscle developmental defects in a mouse with a targeted deletion of the Abelson helper integration site 1 gene, Ahi1, one of the genes known to cause JBTS in humans. While FVB/NJ Ahi1-/- mice display no gross malformations of the cerebellum, deficits are observed in several measures of motor function, strength, and body development. Specifically, Ahi1-/- mice show delayed physical development, delays in surface reflex righting as neonates, and reductions in grip strength and spontaneous locomotor activity as adults. Additionally, Ahi1-/- mice showed evidence of muscle-specific contributions to this phenotype, such as reductions in 1) myoblast differentiation potential in vitro, 2) muscle desmin expression, and 3) overall muscle mass, myonuclear domain, and muscle fiber cross-sectional area. Together, these data suggest that loss of Ahi1 may cause abnormalities in the differentiation of myoblasts to mature muscle cells. Moreover, Ahi1 loss impacts muscle development directly, outside of any indirect impact of cerebellar malformations, revealing a novel myogenic cause for hypotonia in JBTS.
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Nephronophthise und assoziierte Ziliopathien. MED GENET-BERLIN 2018. [DOI: 10.1007/s11825-018-0213-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Zusammenfassung
Die Nephronophthise ist eine autosomal-rezessive tubulointerstitielle Nierenerkrankung und stellt die häufigste genetische Ursache für ein terminales Nierenversagen im Kindes- und Jugendalter dar. Hauptsymptome sind eine Polyurie und Polydipsie als Zeichen einer Harnkonzentrationsstörung sowie sonographisch hyperechogene Nieren mit verwaschener Mark-Rinden-Differenzierung und gelegentlich auftretenden Zysten. Pathophysiologisch liegt eine Dysfunktion primärer Zilien zugrunde, sodass sie zur Gruppe der Ziliopathien gezählt wird. Die Nephronophthise kann isoliert die Nieren betreffen oder zusammen mit anderen Organmanifestationen Syndrome definieren, wie zum Beispiel das Senior–Løken-Syndrom, das Joubert-Syndrom und viele mehr, welche gesammelt als Nephronophthise-assoziierte Ziliopathien (NPH-RC) bezeichnet werden. Charakteristisch für diese Erkrankungsgruppe sind eine ausgeprägte genetische und phänotypische Variabilität sowie zum Teil erhebliche Überlappungen mit anderen zystischen Nierenerkrankungen, was eine korrekte und frühzeitige Diagnosestellung sowie das Stellen individueller Prognosen im klinischen Alltag erschwert. Kurative Therapie-Ansätze existieren bislang nicht.
Ziel dieser Übersichtsarbeit soll es sein, einen verständlichen Überblick über die Nephronophthise und assoziierte Ziliopathien zu geben und deren pathophysiologische Verbindung zu den anderen zystischen Nierenerkrankungen aufzuzeigen.
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