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Kawasaki M, Al-Shama RFM, Nariswari FA, Fabrizi B, van den Berg NWE, Wesselink R, Neefs J, Meulendijks ER, Baalman SWE, Driessen AHG, de Groot JR. Primary cilia suppress the fibrotic activity of atrial fibroblasts from patients with atrial fibrillation in vitro. Sci Rep 2024; 14:12470. [PMID: 38816374 PMCID: PMC11139955 DOI: 10.1038/s41598-024-60298-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 04/21/2024] [Indexed: 06/01/2024] Open
Abstract
Atrial fibrosis serves as an arrhythmogenic substrate in atrial fibrillation (AF) and contributes to AF persistence. Treating atrial fibrosis is challenging because atrial fibroblast activity is multifactorial. We hypothesized that the primary cilium regulates the profibrotic response of AF atrial fibroblasts, and explored therapeutic potentials of targeting primary cilia to treat fibrosis in AF. We included 25 patients without AF (non-AF) and 26 persistent AF patients (AF). Immunohistochemistry using a subset of the patients (non-AF: n = 10, AF: n = 10) showed less ciliated fibroblasts in AF versus non-AF. Acetylated α-tubulin protein levels were decreased in AF, while the gene expressions of AURKA and NEDD9 were highly increased in AF patients' left atrium. Loss of primary cilia in human atrial fibroblasts through IFT88 knockdown enhanced expression of ECM genes, including FN1 and COL1A1. Remarkably, restoration or elongation of primary cilia by an AURKA selective inhibitor or lithium chloride, respectively, prevented the increased expression of ECM genes induced by different profibrotic cytokines in atrial fibroblasts of AF patients. Our data reveal a novel mechanism underlying fibrotic substrate formation via primary cilia loss in AF atrial fibroblasts and suggest a therapeutic potential for abrogating atrial fibrosis by restoring primary cilia.
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Affiliation(s)
- Makiri Kawasaki
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
| | - Rushd F M Al-Shama
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
| | - Fransisca A Nariswari
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Benedetta Fabrizi
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Nicoline W E van den Berg
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Robin Wesselink
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Jolien Neefs
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Eva R Meulendijks
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Sarah W E Baalman
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Antoine H G Driessen
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands
| | - Joris R de Groot
- Amsterdam UMC, Department of Clinical and Experimental Cardiology, Amsterdam Cardiovascular Sciences, Heart Center, University of Amsterdam, Meibergdreef 9, 1105 AZ, Amsterdam, The Netherlands.
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Wu S, Liu M, Zhang M, Ye X, Gu H, Jiang C, Zhu H, Ye X, Li Q, Huang X, Cao M. The gene expression of CALD1, CDH2, and POSTN in fibroblast are related to idiopathic pulmonary fibrosis. Front Immunol 2024; 15:1275064. [PMID: 38370408 PMCID: PMC10869495 DOI: 10.3389/fimmu.2024.1275064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 01/17/2024] [Indexed: 02/20/2024] Open
Abstract
Introduction Idiopathic pulmonary fibrosis (IPF) is characterized by progressive lung dysfunction due to excessive collagen production and tissue scarring. Despite recent advancements, the molecular mechanisms remain unclear. Methods RNA sequencing identified 475 differentially expressed genes (DEGs) in the TGF-β1-induced primary lung fibrosis model. Gene expression chips GSE101286 and GSE110147 from NCBI gene expression omnibus (GEO) database were analyzed using GEO2R, revealing 94 DEGs in IPF lung tissue samples. The gene ontology (GO) and pathway enrichment, Protein-protein interaction (PPI) network construction, and Maximal Clique Centrality (MCC) scoring were performed. Experimental validation included RT-qPCR, Immunohistochemistry (IHC), and Western Blot, with siRNA used for gene knockdown. A co-expression network was constructed by GeneMANIA. Results GO enrichment highlighted significant enrichment of DEGs in TGF-β cellular response, connective tissue development, extracellular matrix components, and signaling pathways such as the AGE-RAGE signaling pathway and ECM-receptor interaction. PPI network analysis identified hub genes, including FN1, COL1A1, POSTN, KIF11, and ECT2. CALD1 (Caldesmon 1), CDH2 (Cadherin 2), and POSTN (Periostin) were identified as dysregulated hub genes in both the RNA sequencing and GEO datasets. Validation experiments confirmed the upregulation of CALD1, CDH2, and POSTN in TGF-β1-treated fibroblasts and IPF lung tissue samples. IHC experiments probed tissue-level expression patterns of these three molecules. Knockdown of CALD1, CDH2, and POSTN attenuated the expression of fibrotic markers (collagen I and α-SMA) in response to TGF-β1 stimulation in primary fibroblasts. Co-expression analysis revealed interactions between hub genes and predicted genes involved in actin cytoskeleton regulation and cell-cell junction organization. Conclusions CALD1, CDH2, and POSTN, identified as potential contributors to pulmonary fibrosis, present promising therapeutic targets for IPF patients.
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Affiliation(s)
- Shufei Wu
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Mengying Liu
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - Mingrui Zhang
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xu Ye
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - Huimin Gu
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China
| | - Cheng Jiang
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - Huihui Zhu
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xiaoling Ye
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
| | - Qi Li
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Xinmei Huang
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
- Nanjing Institute of Respiratory Diseases, Nanjing, China
| | - Mengshu Cao
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, Jiangsu, China
- Department of Respiratory and Critical Care Medicine, Nanjing Drum Tower Hospital Clinical College of Nanjing Medical University, Nanjing, China
- Nanjing Institute of Respiratory Diseases, Nanjing, China
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Apodaca G. Defining the molecular fingerprint of bladder and kidney fibroblasts. Am J Physiol Renal Physiol 2023; 325:F826-F856. [PMID: 37823192 PMCID: PMC10886799 DOI: 10.1152/ajprenal.00284.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 10/04/2023] [Accepted: 10/06/2023] [Indexed: 10/13/2023] Open
Abstract
Fibroblasts are integral to the organization and function of all organs and play critical roles in pathologies such as fibrosis; however, we have limited understanding of the fibroblasts that populate the bladder and kidney. In this review, I describe how transcriptomics is leading to a revolution in our understanding of fibroblast biology by defining the molecular fingerprint (i.e., transcriptome) of universal and specialized fibroblast types, revealing gene signatures that allows one to resolve fibroblasts from other mesenchymal cell types, and providing a new comprehension of the fibroblast lineage. In the kidney, transcriptomics is giving us new insights into the molecular fingerprint of kidney fibroblasts, including those for cortical fibroblasts, medullary fibroblasts, and erythropoietin (EPO)-producing Norn fibroblasts, as well as new information about the gene signatures of kidney myofibroblasts and the transition of kidney fibroblasts into myofibroblasts. Transcriptomics has also revealed that the major cell type in the bladder interstitium is the fibroblast, and that multiple fibroblast types, each with their own molecular fingerprint, are found in the bladder wall. Interleaved throughout is a discussion of how transcriptomics can drive our future understanding of fibroblast identification, diversity, function, and their roles in bladder and kidney biology and physiology in health and in disease states.
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Affiliation(s)
- Gerard Apodaca
- Renal-Electrolyte Division, Department of Medicine, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, United States
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Alves MBR, Girardet L, Augière C, Moon KH, Lavoie-Ouellet C, Bernet A, Soulet D, Calvo E, Teves ME, Beauparlant CJ, Droit A, Bastien A, Robert C, Bok J, Hinton BT, Belleannée C. Hedgehog signaling regulates Wolffian duct development through the primary cilium†. Biol Reprod 2023; 108:241-257. [PMID: 36525341 PMCID: PMC9930401 DOI: 10.1093/biolre/ioac210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 11/01/2022] [Accepted: 11/25/2022] [Indexed: 12/23/2022] Open
Abstract
Primary cilia play pivotal roles in embryonic patterning and organogenesis through transduction of the Hedgehog signaling pathway (Hh). Although mutations in Hh morphogens impair the development of the gonads and trigger male infertility, the contribution of Hh and primary cilia in the development of male reproductive ductules, including the epididymis, remains unknown. From a Pax2Cre; IFT88fl/fl knock-out mouse model, we found that primary cilia deletion is associated with imbalanced Hh signaling and morphometric changes in the Wolffian duct (WD), the embryonic precursor of the epididymis. Similar effects were observed following pharmacological blockade of primary cilia formation and Hh modulation on WD organotypic cultures. The expression of genes involved in extracellular matrix, mesenchymal-epithelial transition, canonical Hh and WD development was significantly altered after treatments. Altogether, we identified the primary cilia-dependent Hh signaling as a master regulator of genes involved in WD development. This provides new insights regarding the etiology of sexual differentiation and male infertility issues.
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Affiliation(s)
- Maíra Bianchi Rodrigues Alves
- Faculty of Medicine, Department of Obstetrics, Gynecology and Reproduction, CHU de Québec Research Center (CHUL)—Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle—Université Laval, Quebec City, QC, Canada
| | - Laura Girardet
- Faculty of Medicine, Department of Obstetrics, Gynecology and Reproduction, CHU de Québec Research Center (CHUL)—Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle—Université Laval, Quebec City, QC, Canada
| | - Céline Augière
- Faculty of Medicine, Department of Obstetrics, Gynecology and Reproduction, CHU de Québec Research Center (CHUL)—Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle—Université Laval, Quebec City, QC, Canada
| | - Kyeong Hye Moon
- Department of Anatomy, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Camille Lavoie-Ouellet
- Faculty of Medicine, Department of Obstetrics, Gynecology and Reproduction, CHU de Québec Research Center (CHUL)—Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle—Université Laval, Quebec City, QC, Canada
| | - Agathe Bernet
- Faculty of Medicine, Department of Obstetrics, Gynecology and Reproduction, CHU de Québec Research Center (CHUL)—Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle—Université Laval, Quebec City, QC, Canada
| | - Denis Soulet
- Faculty of Pharmacy, Department of Neurosciences, CHU de Québec Research Center (CHUL)—Université Laval, Quebec City, QC, Canada
| | - Ezequiel Calvo
- Faculty of Medicine, Department of Obstetrics, Gynecology and Reproduction, CHU de Québec Research Center (CHUL)—Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle—Université Laval, Quebec City, QC, Canada
| | - Maria E Teves
- Department of Obstetrics and Gynecology, Virginia Commonwealth University, Richmond, VA, USA
| | - Charles Joly Beauparlant
- Computational Biology Laboratory Research Centre, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Arnaud Droit
- Computational Biology Laboratory Research Centre, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Alexandre Bastien
- Faculty of Agriculture and Food Sciences, Department of Animal Sciences—Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle—Université Laval, Quebec City, QC, Canada
| | - Claude Robert
- Faculty of Agriculture and Food Sciences, Department of Animal Sciences—Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle—Université Laval, Quebec City, QC, Canada
| | - Jinwoong Bok
- Department of Anatomy, Yonsei University College of Medicine, Seoul, Republic of Korea
| | - Barry T Hinton
- Department of Cell Biology, University of Virginia School of Medicine, Charlottesville, VA, USA
| | - Clémence Belleannée
- Faculty of Medicine, Department of Obstetrics, Gynecology and Reproduction, CHU de Québec Research Center (CHUL)—Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle—Université Laval, Quebec City, QC, Canada
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Ernault AC, Kawasaki M, Fabrizi B, Montañés-Agudo P, Amersfoorth SCM, Al-Shama RFM, Coronel R, De Groot JR. Knockdown of Ift88 in fibroblasts causes extracellular matrix remodeling and decreases conduction velocity in cardiomyocyte monolayers. Front Physiol 2022; 13:1057200. [DOI: 10.3389/fphys.2022.1057200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 11/07/2022] [Indexed: 11/18/2022] Open
Abstract
Background: Atrial fibrosis plays an important role in the development and persistence of atrial fibrillation by promoting reentry. Primary cilia have been identified as a regulator of fibroblasts (FB) activation and extracellular matrix (ECM) deposition. We hypothesized that selective reduction of primary cilia causes increased fibrosis and facilitates reentry.Aim: The aim of this study was to disrupt the formation of primary cilia in FB and examine its consequences on ECM and conduction in a co-culture system of cardiomyocytes (CM) and FB.Materials: Using short interfering RNA (siRNA), we removed primary cilia in neonatal rat ventricular FB by reducing the expression of Ift88 gene required for ciliary assembly. We co-cultured neonatal rat ventricular cardiomyocytes (CM) with FB previously transfected with Ift88 siRNA (siIft88) or negative control siRNA (siNC) for 48 h. We examined the consequences of ciliated fibroblasts reduction on conduction and tissue remodeling by performing electrical mapping, microelectrode, and gene expression measurements.Results: Transfection of FB with siIft88 resulted in a significant 60% and 30% reduction of relative Ift88 expression in FB and CM-FB co-cultures, respectively, compared to siNC. Knockdown of Ift88 significantly increased the expression of ECM genes Fn1, Col1a1 and Ctgf by 38%, 30% and 18%, respectively, in comparison to transfection with siNC. Conduction velocity (CV) was significantly decreased in the siIft88 group in comparison to siNC [11.12 ± 4.27 cm/s (n = 10) vs. 17.00 ± 6.20 (n = 10) respectively, p < 0.05]. The fraction of sites with interelectrode activation block was larger in the siIft88 group than in the siNC group (6.59 × 10−2 ± 8.01 × 10−2 vs. 1.18 × 10−2 ± 3.72 × 10−2 respectively, p < 0.05). We documented spontaneous reentrant arrhythmias in two cultures in the siIft88 group and in none of the siNC group. Action potentials were not significantly different between siNC and siIft88 groups.Conclusion: Disruption of cilia formation by siIft88 causes ECM remodeling and conduction abnormalities. Prevention of cilia loss could be a target for prevention of arrhythmias.
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The dynamic organelle primary cilia: emerging roles in organ fibrosis. Curr Opin Rheumatol 2021; 33:495-504. [PMID: 34494608 DOI: 10.1097/bor.0000000000000841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE OF REVIEW Primary cilia, the antenna-like organelles on most mammalian cells, host key components of multiple morphogen signal transduction pathways. Mutations in genes responsible for primary cilia assembly and function generally result in pathological conditions known as ciliopathies, which underlie several diseases, including various forms of fibrosis. Primary cilia modulate cellular responses to extracellular cues, including TGF-β and morphogens, such as Hedgehog. Aberrant morphogen signaling is recognized as essential for the transition of mesenchymal progenitor cells to myofibroblasts, the key step in fibrosis. This article aims to provide a critical overview of recent developments and insights in primary cilia biology relevant to fibrosis. RECENT FINDINGS Several studies have highlighted the association of altered primary cilia with various forms of fibrosis. In a rather complex manner, the presence of primary cilia seems to be required for initiation of myofibroblast transition, whereas its loss promotes myofibroblast transition at a later stage. Recent evidence also suggested that noncanonical functions of ciliary transport proteins may influence, such cellular transitions independently of primary cilia. The possibility of opposing signaling regulations being topologically separated between primary cilia and plasma membrane could also be critical for fibrosis. SUMMARY Recent progress in the field suggests that primary cilia are critical mediators of the pathogenesis of fibrosis. Understanding the potential role of primary cilia in fibrosis and the underlying mechanisms may pave the way for entirely new approaches for fibrosis prevention and treatment of SSc.
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Ng DCH, Ho UY, Grounds MD. Cilia, Centrosomes and Skeletal Muscle. Int J Mol Sci 2021; 22:9605. [PMID: 34502512 PMCID: PMC8431768 DOI: 10.3390/ijms22179605] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Revised: 08/30/2021] [Accepted: 09/01/2021] [Indexed: 12/13/2022] Open
Abstract
Primary cilia are non-motile, cell cycle-associated organelles that can be found on most vertebrate cell types. Comprised of microtubule bundles organised into an axoneme and anchored by a mature centriole or basal body, primary cilia are dynamic signalling platforms that are intimately involved in cellular responses to their extracellular milieu. Defects in ciliogenesis or dysfunction in cilia signalling underlie a host of developmental disorders collectively referred to as ciliopathies, reinforcing important roles for cilia in human health. Whilst primary cilia have long been recognised to be present in striated muscle, their role in muscle is not well understood. However, recent studies indicate important contributions, particularly in skeletal muscle, that have to date remained underappreciated. Here, we explore recent revelations that the sensory and signalling functions of cilia on muscle progenitors regulate cell cycle progression, trigger differentiation and maintain a commitment to myogenesis. Cilia disassembly is initiated during myoblast fusion. However, the remnants of primary cilia persist in multi-nucleated myotubes, and we discuss their potential role in late-stage differentiation and myofiber formation. Reciprocal interactions between cilia and the extracellular matrix (ECM) microenvironment described for other tissues may also inform on parallel interactions in skeletal muscle. We also discuss emerging evidence that cilia on fibroblasts/fibro-adipogenic progenitors and myofibroblasts may influence cell fate in both a cell autonomous and non-autonomous manner with critical consequences for skeletal muscle ageing and repair in response to injury and disease. This review addresses the enigmatic but emerging role of primary cilia in satellite cells in myoblasts and myofibers during myogenesis, as well as the wider tissue microenvironment required for skeletal muscle formation and homeostasis.
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Affiliation(s)
- Dominic C. H. Ng
- School of Biomedical Science, Faculty of Medicine, University of Queensland, St Lucia, Brisbane, QLD 4072, Australia;
| | - Uda Y. Ho
- School of Biomedical Science, Faculty of Medicine, University of Queensland, St Lucia, Brisbane, QLD 4072, Australia;
| | - Miranda D. Grounds
- School of Human Sciences, Faculty of Medicine, University of Western Australia, Perth, WA 6009, Australia
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Speight P, Rozycki M, Venugopal S, Szászi K, Kofler M, Kapus A. Myocardin-related transcription factor and serum response factor regulate cilium turnover by both transcriptional and local mechanisms. iScience 2021; 24:102739. [PMID: 34278253 PMCID: PMC8261663 DOI: 10.1016/j.isci.2021.102739] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2020] [Revised: 11/02/2020] [Accepted: 06/15/2021] [Indexed: 12/31/2022] Open
Abstract
Turnover of the primary cilium (PC) is critical for proliferation and tissue homeostasis. Each key component of the PC resorption machinery, the HEF1/Aurora kinase A (AurA)/HDAC6 pathway harbors cis-elements potentially targeted by the transcriptional co-activator myocardin-related transcription factor (MRTF) and/or its partner serum response factor (SRF). Thus we investigated if MRTF and/or SRF regulate PC turnover. Here we show that (1) both MRTF and SRF are indispensable for serum-induced PC resorption, and (2) they act via both transcriptional and local mechanisms. Intriguingly, MRTF and SRF are present in the basal body and/or the PC, and serum facilitates ciliary MRTF recruitment. MRTF promotes the stability and ciliary accumulation of AurA and facilitates SRF phosphorylation. Ciliary SRF interacts with AurA and HDAC6. MRTF also inhibits ciliogenesis. It interacts with and is required for the correct localization of the ciliogenesis modulator CEP290. Thus, MRTF and SRF are critical regulators of PC assembly and/or disassembly, acting both as transcription factors and as PC constituents.
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Affiliation(s)
- Pam Speight
- Keenan Research Centre for Biomedical Science of the St. Michael's Hospital, University of Toronto, Room 621, 209 Victoria Street, Toronto, ON M5B 1T8, Canada
| | - Matthew Rozycki
- Keenan Research Centre for Biomedical Science of the St. Michael's Hospital, University of Toronto, Room 621, 209 Victoria Street, Toronto, ON M5B 1T8, Canada
| | - Shruthi Venugopal
- Keenan Research Centre for Biomedical Science of the St. Michael's Hospital, University of Toronto, Room 621, 209 Victoria Street, Toronto, ON M5B 1T8, Canada
| | - Katalin Szászi
- Keenan Research Centre for Biomedical Science of the St. Michael's Hospital, University of Toronto, Room 621, 209 Victoria Street, Toronto, ON M5B 1T8, Canada
- Department of Surgery, University of Toronto, Toronto, ON M5B 1T8, Canada
| | - Michael Kofler
- Keenan Research Centre for Biomedical Science of the St. Michael's Hospital, University of Toronto, Room 621, 209 Victoria Street, Toronto, ON M5B 1T8, Canada
| | - András Kapus
- Keenan Research Centre for Biomedical Science of the St. Michael's Hospital, University of Toronto, Room 621, 209 Victoria Street, Toronto, ON M5B 1T8, Canada
- Department of Surgery, University of Toronto, Toronto, ON M5B 1T8, Canada
- Department of Biochemistry, University of Toronto, Toronto, ON M5B 1T8, Canada
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Tsou PS, Palisoc PJ, Ali M, Khanna D, Sawalha AH. Genome-Wide Reduction in Chromatin Accessibility and Unique Transcription Factor Footprints in Endothelial Cells and Fibroblasts in Scleroderma Skin. Arthritis Rheumatol 2021; 73:1501-1513. [PMID: 33586346 DOI: 10.1002/art.41694] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 12/22/2020] [Accepted: 02/09/2021] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Systemic sclerosis (SSc) is characterized by widespread fibrosis and vascular complications. This study was undertaken to examine the chromatin landscape and transcription factor footprints in SSc, using an assay for genome-wide chromatin accessibility. METHODS Dermal endothelial cells (ECs) and fibroblasts were isolated from healthy controls and patients with diffuse cutaneous SSc (dcSSc). Assay for transposase-accessible chromatin with sequencing (ATAC-seq) was performed to assess genome-wide chromatin accessibility at a read depth of ~150 million reads per sample. Transcription factor footprinting and motif binding analysis were performed, followed by functional experiments. RESULTS Chromatin accessibility was significantly reduced in dcSSc patients compared to healthy controls. Differentially accessible chromatin loci were enriched in pathways and gene ontologies involved in the nervous system, cell membrane projections and cilia motility, nuclear and steroid receptors, and nitric oxide. In addition, chromatin binding of transcription factors SNAI2, ETV2, and ELF1 was significantly increased in dcSSc ECs, while recruitment of RUNX1 and RUNX2 was enriched in dcSSc fibroblasts. We found significant down-regulation of the neuronal gene NRXN1 and up-regulation of SNAI2 and ETV2 in dcSSc ECs. In dcSSc fibroblasts, down-regulation of the neuronal gene ENTPD1 and up-regulation of RUNX2 were confirmed. Further functional analysis revealed that ETV2 and NRXN1 dysregulation affected angiogenesis in ECs, while ENTPD1 enhanced profibrotic properties in dcSSc fibroblasts. CONCLUSION Our data identify the chromatin blueprint of dcSSc, and suggest that neuronal-related characteristics of SSc ECs and fibroblasts could be a culprit for dysregulated angiogenesis and enhanced fibrosis. Targeting the key pathways and transcription factors identified might present novel therapeutic approaches in SSc.
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Keele GR, Prokop JW, He H, Holl K, Littrell J, Deal AW, Kim Y, Kyle PB, Attipoe E, Johnson AC, Uhl KL, Sirpilla OL, Jahanbakhsh S, Robinson M, Levy S, Valdar W, Garrett MR, Solberg Woods LC. Sept8/SEPTIN8 involvement in cellular structure and kidney damage is identified by genetic mapping and a novel human tubule hypoxic model. Sci Rep 2021; 11:2071. [PMID: 33483609 PMCID: PMC7822875 DOI: 10.1038/s41598-021-81550-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Accepted: 01/05/2021] [Indexed: 01/29/2023] Open
Abstract
Chronic kidney disease (CKD), which can ultimately progress to kidney failure, is influenced by genetics and the environment. Genes identified in human genome wide association studies (GWAS) explain only a small proportion of the heritable variation and lack functional validation, indicating the need for additional model systems. Outbred heterogeneous stock (HS) rats have been used for genetic fine-mapping of complex traits, but have not previously been used for CKD traits. We performed GWAS for urinary protein excretion (UPE) and CKD related serum biochemistries in 245 male HS rats. Quantitative trait loci (QTL) were identified using a linear mixed effect model that tested for association with imputed genotypes. Candidate genes were identified using bioinformatics tools and targeted RNAseq followed by testing in a novel in vitro model of human tubule, hypoxia-induced damage. We identified two QTL for UPE and five for serum biochemistries. Protein modeling identified a missense variant within Septin 8 (Sept8) as a candidate for UPE. Sept8/SEPTIN8 expression increased in HS rats with elevated UPE and tubulointerstitial injury and in the in vitro hypoxia model. SEPTIN8 is detected within proximal tubule cells in human kidney samples and localizes with acetyl-alpha tubulin in the culture system. After hypoxia, SEPTIN8 staining becomes diffuse and appears to relocalize with actin. These data suggest a role of SEPTIN8 in cellular organization and structure in response to environmental stress. This study demonstrates that integration of a rat genetic model with an environmentally induced tubule damage system identifies Sept8/SEPTIN8 and informs novel aspects of the complex gene by environmental interactions contributing to CKD risk.
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Affiliation(s)
| | - Jeremy W Prokop
- HudsonAlpha Institute, Huntsville, AL, USA
- Department of Pediatrics and Human Development, Department of Pharmacology, Michigan State University, Grand Rapids, MI, USA
| | - Hong He
- Departments of Pediatrics and Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Katie Holl
- Departments of Pediatrics and Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - John Littrell
- Departments of Pediatrics and Physiology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Aaron W Deal
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA
| | - Yunjung Kim
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Patrick B Kyle
- Department of Pharmacology, Medicine (Nephrology), Pediatrics (Genetics), University of Mississippi Medical Center, Jackson, MS, USA
- Department of Pathology, University of Mississippi Medical Center, Jackson, MS, USA
| | - Esinam Attipoe
- Department of Pharmacology, Medicine (Nephrology), Pediatrics (Genetics), University of Mississippi Medical Center, Jackson, MS, USA
| | - Ashley C Johnson
- Department of Pharmacology, Medicine (Nephrology), Pediatrics (Genetics), University of Mississippi Medical Center, Jackson, MS, USA
| | - Katie L Uhl
- Department of Pediatrics and Human Development, Department of Pharmacology, Michigan State University, Grand Rapids, MI, USA
| | - Olivia L Sirpilla
- Department of Pediatrics and Human Development, Department of Pharmacology, Michigan State University, Grand Rapids, MI, USA
| | - Seyedehameneh Jahanbakhsh
- Department of Pediatrics and Human Development, Department of Pharmacology, Michigan State University, Grand Rapids, MI, USA
| | | | - Shawn Levy
- HudsonAlpha Institute, Huntsville, AL, USA
| | - William Valdar
- Department of Genetics, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Michael R Garrett
- Department of Pharmacology, Medicine (Nephrology), Pediatrics (Genetics), University of Mississippi Medical Center, Jackson, MS, USA
| | - Leah C Solberg Woods
- Department of Internal Medicine, Wake Forest School of Medicine, Winston-Salem, NC, USA.
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11
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Hosio M, Jaks V, Lagus H, Vuola J, Ogawa R, Kankuri E. Primary Ciliary Signaling in the Skin-Contribution to Wound Healing and Scarring. Front Cell Dev Biol 2020; 8:578384. [PMID: 33282860 PMCID: PMC7691485 DOI: 10.3389/fcell.2020.578384] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 10/08/2020] [Indexed: 12/21/2022] Open
Abstract
Primary cilia (PC) are solitary, post-mitotic, microtubule-based, and membrane-covered protrusions that are found on almost every mammalian cell. PC are specialized cellular sensory organelles that transmit environmental information to the cell. Signaling through PC is involved in the regulation of a variety of cellular processes, including proliferation, differentiation, and migration. Conversely, defective, or abnormal PC signaling can contribute to the development of various pathological conditions. Our knowledge of the role of PC in organ development and function is largely based on ciliopathies, a family of genetic disorders with mutations affecting the structure and function of PC. In this review, we focus on the role of PC in their major signaling pathways active in skin cells, and their contribution to wound healing and scarring. To provide comprehensive insights into the current understanding of PC functions, we have collected data available in the literature, including evidence across cell types, tissues, and animal species. We conclude that PC are underappreciated subcellular organelles that significantly contribute to both physiological and pathological processes of the skin development and wound healing. Thus, PC assembly and disassembly and PC signaling may serve as attractive targets for antifibrotic and antiscarring therapies.
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Affiliation(s)
- Mayu Hosio
- Faculty of Medicine, Department of Pharmacology, University of Helsinki, Helsinki, Finland
| | - Viljar Jaks
- Institute of Molecular and Cell Biology, University of Tartu, Tartu, Estonia
- Dermatology Clinic, Tartu University Hospital, Tartu, Estonia
| | - Heli Lagus
- Department of Plastic Surgery and Wound Healing Centre, Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Jyrki Vuola
- Helsinki University Hospital, University of Helsinki, Helsinki, Finland
| | - Rei Ogawa
- Department of Plastic, Reconstructive and Aesthetic Surgery, Nippon Medical School, Tokyo, Japan
| | - Esko Kankuri
- Faculty of Medicine, Department of Pharmacology, University of Helsinki, Helsinki, Finland
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12
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Huang Q, Chen Y, Shen S, Wang Y, Liu L, Wu S, Xu W, Zhao W, Lin M, Wu J. Klotho antagonizes pulmonary fibrosis through suppressing pulmonary fibroblasts activation, migration, and extracellular matrix production: a therapeutic implication for idiopathic pulmonary fibrosis. Aging (Albany NY) 2020; 12:5812-5831. [PMID: 32244228 PMCID: PMC7185122 DOI: 10.18632/aging.102978] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 02/05/2020] [Indexed: 12/25/2022]
Abstract
Idiopathic pulmonary fibrosis (IPF) has been widely accepted as an aging-related fatal lung disease with a therapeutic impasse, largely a consequence of the complex and polygenic gene architecture underlying the molecular pathology of IPF. Here, by conducting an integrative network analysis on the largest IPF case-control RNA-seq dataset to date, we attributed the systems-level alteration in IPF to disruptions in a handful of biological processes including cell migration, transforming growth factor-β (TGF-β) signaling and extracellular matrix (ECM), and identified klotho (KL), a typical anti-aging molecule, as a potential master regulator of those disease-relevant processes. Following experiments showed reduced Kl in isolated pulmonary fibroblasts from bleomycin-exposed mice, and demonstrated that recombinant KL effectively mitigated pulmonary fibrosis in an ex vivo model and alleviated TGF-β-induced pulmonary fibroblasts activation, migration, and ECM production in vitro, which was partially ascribed to FOXF1 and CAV1, two highly co-expressed genes of KL in the IPF. Overall, KL appears to be a vital regulator during pulmonary fibrosis. Given that administration of exogenous KL is a feasible treatment strategy, our work highlighted a promising target gene that could be easily manipulated, leaving the field well placed to further explore the therapeutic potential of KL for IPF.
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Affiliation(s)
- Qiqing Huang
- Key Laboratory of Geriatrics of Jiangsu Province, Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Yan Chen
- Key Laboratory of Geriatrics of Jiangsu Province, Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Shaoran Shen
- Key Laboratory of Geriatrics of Jiangsu Province, Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Yuanyuan Wang
- Department of Neurobiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, Jiangsu, China
| | - Liya Liu
- Department of Neurobiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, Jiangsu, China
| | - Shuangshuang Wu
- Key Laboratory of Geriatrics of Jiangsu Province, Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Wei Xu
- Key Laboratory of Geriatrics of Jiangsu Province, Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Weihong Zhao
- Key Laboratory of Geriatrics of Jiangsu Province, Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, China
| | - Mingyan Lin
- Department of Neurobiology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing 211166, Jiangsu, China
| | - Jianqing Wu
- Key Laboratory of Geriatrics of Jiangsu Province, Department of Geriatrics, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu, China
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13
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Li S, Wei Z, Li G, Zhang Q, Niu S, Xu D, Mao N, Chen S, Gao X, Cai W, Zhu Y, Zhang G, Li D, Yi X, Yang F, Xu H. Silica Perturbs Primary Cilia and Causes Myofibroblast Differentiation during Silicosis by Reduction of the KIF3A-Repressor GLI3 Complex. Theranostics 2020; 10:1719-1732. [PMID: 32042332 PMCID: PMC6993221 DOI: 10.7150/thno.37049] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Accepted: 10/04/2019] [Indexed: 02/07/2023] Open
Abstract
The purpose of this study was to determine the effects of Kinesin family member 3A (KIF3A) on primary cilia and myofibroblast differentiation during silicosis by regulating Sonic hedgehog (SHH) signalling. Methods: Changes in primary cilia during silicosis and myofibroblast differentiation were detected in silicotic patients, experimental silicotic rats, and a myofibroblast differentiation model induced by SiO2. We also explored the mechanisms underlying KIF3A regulation of Glioma-associated oncogene homologs (GLIs) involved in myofibroblast differentiation. Results: Primary cilia (marked by ARL13B and Ac-α-Tub) and ciliary-related proteins (IFT 88 and KIF3A) were increased initially and then decreased as silicosis progressed. Loss and shedding of primary cilia were also found during silicosis. Treatment of MRC-5 fibroblasts with silica and then transfection of KIF3A-siRNA blocked activation of SHH signalling, but increased GLI2FL as a transcriptional activator of SRF, and reduced the inhibitory effect of GLI3R on ACTA2. Conclusion: Our findings indicate that primary cilia are markedly altered during silicosis and the loss of KIF3A may promote myofibroblast differentiation induced by SiO2.
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