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Ryu S, Ko D, Shin B, Rhee K. The intercentriolar fibers function as docking sites of centriolar satellites for cilia assembly. J Cell Biol 2024; 223:e202105065. [PMID: 38416111 PMCID: PMC10901237 DOI: 10.1083/jcb.202105065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 08/09/2023] [Accepted: 01/15/2024] [Indexed: 02/29/2024] Open
Abstract
Two mother centrioles in an animal cell are linked by intercentriolar fibers that have CROCC/rootletin as their main building block. Here, we investigated the regulatory role of intercentriolar/rootlet fibers in cilia assembly. The cilia formation rates were significantly reduced in the CEP250/C-NAP1 and CROCC/rootletin knockout (KO) cells, irrespective of the departure of the young mother centrioles from the basal bodies. In addition, centriolar satellites were dispersed throughout the cytoplasm in the CEP250 and CROCC KO cells. We observed that PCM1 directly binds to CROCC. Their interaction is critical not only for the accumulation of centriolar satellites near the centrosomes/basal bodies but also for cilia formation. Finally, we observed that the centriolar satellite proteins are localized at the intercentriolar/rootlet fibers in the kidney epithelial cells. Based on these findings, we propose that the intercentriolar/rootlet fibers function as docking sites for centriolar satellites near the centrosomes/basal bodies and facilitate the cilia assembly process.
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Affiliation(s)
- Sungjin Ryu
- Department of Biological Sciences, Seoul National University, Seoul, South Korea
| | - Donghee Ko
- Department of Biological Sciences, Seoul National University, Seoul, South Korea
| | - Byungho Shin
- Department of Biological Sciences, Seoul National University, Seoul, South Korea
| | - Kunsoo Rhee
- Department of Biological Sciences, Seoul National University, Seoul, South Korea
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2
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Ma W, Wei L, Jin L, Ma Q, Zhang T, Zhao Y, Hua J, Zhang Y, Wei W, Ding N, Wang J, He J. YAP/Aurora A-mediated ciliogenesis regulates ionizing radiation-induced senescence via Hedgehog pathway in tumor cells. Biochim Biophys Acta Mol Basis Dis 2024; 1870:167062. [PMID: 38342416 DOI: 10.1016/j.bbadis.2024.167062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 02/06/2024] [Accepted: 02/06/2024] [Indexed: 02/13/2024]
Abstract
Primary cilia are antenna-like organelles that play critical roles in sensing and responding to various signals. Nevertheless, the function of primary cilia in cellular response to ionizing radiation (IR) in tumor cells remains unclear. Here, we show that primary cilia are frequently expressed in tumor cells and tissues. Notably, IR promotes cilia formation and elongation in time- and dose-dependent manners. Mechanistic study shows that the suppression of YAP/Aurora A pathway contributes to IR-induced ciliogenesis, which is diminished by Aurora A overexpression. The ciliated tumor cells undergo senescence but not apoptosis in response to IR and the abrogation of cilia formation is sufficient to elevate the lethal effect of IR. Furthermore, we show that IR-induced ciliogenesis leads to the activation of Hedgehog signaling pathway to drive senescence and resist apoptosis, and its blockage enhances cellular radiosensitivity by switching senescence to apoptosis. In summary, this work shows evidence of primary cilia in coordinating cellular response to IR in tumor cells, which may help to supply a novel sensitizing target to improve the outcome of radiotherapy.
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Affiliation(s)
- Wei Ma
- Key Laboratory of Space Radiobiology of Gansu Province & CAS Key Laboratory of Heavy Ion Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Li Wei
- NHC Key Laboratory of Diagnosis and Therapy of Gastrointestinal Tumor & Gansu Provincial Clinical Research Center for Laboratory Medicine, Gansu Provincial Hospital, Lanzhou 730000, China
| | - Liangliang Jin
- Department of Pathology, The 940th Hospital of Joint Logistics Support force of Chinese People's Liberation Army, Lanzhou 730000, China
| | - Qinglong Ma
- School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Tongshan Zhang
- Key Laboratory of Space Radiobiology of Gansu Province & CAS Key Laboratory of Heavy Ion Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanfei Zhao
- School of Basic Medical Sciences, Lanzhou University, Lanzhou 730000, China
| | - Junrui Hua
- Key Laboratory of Space Radiobiology of Gansu Province & CAS Key Laboratory of Heavy Ion Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - Yanan Zhang
- Key Laboratory of Space Radiobiology of Gansu Province & CAS Key Laboratory of Heavy Ion Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - Wenjun Wei
- Key Laboratory of Space Radiobiology of Gansu Province & CAS Key Laboratory of Heavy Ion Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Nan Ding
- Key Laboratory of Space Radiobiology of Gansu Province & CAS Key Laboratory of Heavy Ion Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jufang Wang
- Key Laboratory of Space Radiobiology of Gansu Province & CAS Key Laboratory of Heavy Ion Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Jinpeng He
- Key Laboratory of Space Radiobiology of Gansu Province & CAS Key Laboratory of Heavy Ion Radiation Biology and Medicine, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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3
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Basu B, Lake AVR, China B, Szymanska K, Wheway G, Bell S, Morrison E, Bond J, Johnson CA. Racgap1 knockdown results in cells with multiple cilia due to cytokinesis failure. Ann Hum Genet 2024; 88:45-57. [PMID: 37771269 PMCID: PMC10952936 DOI: 10.1111/ahg.12529] [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: 06/26/2023] [Revised: 08/16/2023] [Accepted: 09/07/2023] [Indexed: 09/30/2023]
Abstract
Most mammalian cells have a single primary cilium that acts as a signalling hub in mediating cellular functions. However, little is known about the mechanisms that result in aberrant supernumerary primary cilia per cell. In this study, we re-analysed a previously published whole-genome siRNA-based reverse genetic screen for genes mediating ciliogenesis to identify knockdowns that permit multi-ciliation. We identified siRNA knockdowns that caused significant formation of supernumerary cilia, validated candidate hits in different cell-lines and confirmed that RACGAP1, a component of the centralspindlin complex, was the strongest candidate hit at the whole-genome level. Following loss of RACGAP1, mother centrioles were specified correctly prior to ciliogenesis and the cilia appeared normal. Live cell imaging revealed that increased cilia incidence was caused by cytokinesis failure which led to the formation of multinucleate cells with supernumerary cilia. This suggests that the signalling mechanisms for ciliogenesis are unable to identify supernumerary centrosomes and therefore allow ciliation of duplicated centrosomes as if they were in a new diploid daughter cell. These results, demonstrating that aberrant ciliogenesis is de-coupled from cell cycle regulation, have functional implications in diseases marked by centrosomal amplification.
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Affiliation(s)
- Basudha Basu
- Division of Molecular Medicine, Leeds Institute of Medical ResearchUniversity of LeedsLeedsUK
| | - Alice V. R. Lake
- Division of Molecular Medicine, Leeds Institute of Medical ResearchUniversity of LeedsLeedsUK
| | - Becky China
- Division of Molecular Medicine, Leeds Institute of Medical ResearchUniversity of LeedsLeedsUK
| | - Katarzyna Szymanska
- Division of Molecular Medicine, Leeds Institute of Medical ResearchUniversity of LeedsLeedsUK
| | - Gabrielle Wheway
- University Hospital Southampton NHS Foundation TrustSouthamptonUK
- Faculty of Medicine, Human Development and HealthUniversity of SouthamptonSouthamptonUK
| | - Sandra Bell
- Division of Molecular Medicine, Leeds Institute of Medical ResearchUniversity of LeedsLeedsUK
| | - Ewan Morrison
- Division of Molecular Medicine, Leeds Institute of Medical ResearchUniversity of LeedsLeedsUK
| | - Jacquelyn Bond
- Division of Molecular Medicine, Leeds Institute of Medical ResearchUniversity of LeedsLeedsUK
| | - Colin A. Johnson
- Division of Molecular Medicine, Leeds Institute of Medical ResearchUniversity of LeedsLeedsUK
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Van Heurck R, Bonnefont J, Wojno M, Suzuki IK, Velez-Bravo FD, Erkol E, Nguyen DT, Herpoel A, Bilheu A, Beckers S, Ledent C, Vanderhaeghen P. CROCCP2 acts as a human-specific modifier of cilia dynamics and mTOR signaling to promote expansion of cortical progenitors. Neuron 2023; 111:65-80.e6. [PMID: 36334595 PMCID: PMC9831670 DOI: 10.1016/j.neuron.2022.10.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 08/12/2022] [Accepted: 10/09/2022] [Indexed: 11/06/2022]
Abstract
The primary cilium is a central signaling component during embryonic development. Here we focus on CROCCP2, a hominid-specific gene duplicate from ciliary rootlet coiled coil (CROCC), also known as rootletin, that encodes the major component of the ciliary rootlet. We find that CROCCP2 is highly expressed in the human fetal brain and not in other primate species. CROCCP2 gain of function in the mouse embryonic cortex and human cortical cells and organoids results in decreased ciliogenesis and increased cortical progenitor amplification, particularly basal progenitors. CROCCP2 decreases ciliary dynamics by inhibition of the IFT20 ciliary trafficking protein, which then impacts neurogenesis through increased mTOR signaling. Loss of function of CROCCP2 in human cortical cells and organoids leads to increased ciliogenesis, decreased mTOR signaling, and impaired basal progenitor amplification. These data identify CROCCP2 as a human-specific modifier of cortical neurogenesis that acts through modulation of ciliary dynamics and mTOR signaling.
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Affiliation(s)
- Roxane Van Heurck
- VIB-KU Leuven Center for Brain & Disease Research, 3000 Leuven, Belgium,Department of Neurosciences, Leuven Brain Institute, KU Leuven, 3000 Leuven, Belgium,Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium
| | - Jérôme Bonnefont
- VIB-KU Leuven Center for Brain & Disease Research, 3000 Leuven, Belgium,Department of Neurosciences, Leuven Brain Institute, KU Leuven, 3000 Leuven, Belgium,Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium
| | - Marta Wojno
- VIB-KU Leuven Center for Brain & Disease Research, 3000 Leuven, Belgium,Department of Neurosciences, Leuven Brain Institute, KU Leuven, 3000 Leuven, Belgium,Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium
| | - Ikuo K. Suzuki
- VIB-KU Leuven Center for Brain & Disease Research, 3000 Leuven, Belgium,Department of Neurosciences, Leuven Brain Institute, KU Leuven, 3000 Leuven, Belgium,Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium,Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Fausto D. Velez-Bravo
- VIB-KU Leuven Center for Brain & Disease Research, 3000 Leuven, Belgium,Department of Neurosciences, Leuven Brain Institute, KU Leuven, 3000 Leuven, Belgium,Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium
| | - Emir Erkol
- VIB-KU Leuven Center for Brain & Disease Research, 3000 Leuven, Belgium,Department of Neurosciences, Leuven Brain Institute, KU Leuven, 3000 Leuven, Belgium,Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium
| | - Dan Truc Nguyen
- Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium
| | - Adèle Herpoel
- Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium
| | - Angéline Bilheu
- Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium
| | - Sofie Beckers
- VIB-KU Leuven Center for Brain & Disease Research, 3000 Leuven, Belgium,Department of Neurosciences, Leuven Brain Institute, KU Leuven, 3000 Leuven, Belgium
| | - Catherine Ledent
- Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium
| | - Pierre Vanderhaeghen
- VIB-KU Leuven Center for Brain & Disease Research, 3000 Leuven, Belgium,Department of Neurosciences, Leuven Brain Institute, KU Leuven, 3000 Leuven, Belgium,Université Libre de Bruxelles (U.L.B.), Institut de Recherches en Biologie Humaine et Moléculaire (IRIBHM), and ULB Neuroscience Institute (UNI), 1070 Brussels, Belgium,Corresponding author
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5
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Turn RE, Linnert J, Gigante ED, Wolfrum U, Caspary T, Kahn RA. Roles for ELMOD2 and Rootletin in ciliogenesis. Mol Biol Cell 2021; 32:800-822. [PMID: 33596093 PMCID: PMC8108518 DOI: 10.1091/mbc.e20-10-0635] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
ELMOD2 is a GTPase-activating protein with uniquely broad specificity for ARF family GTPases. We previously showed that it acts with ARL2 in mitochondrial fusion and microtubule stability and with ARF6 during cytokinesis. Mouse embryonic fibroblasts deleted for ELMOD2 also displayed changes in cilia-related processes including increased ciliation, multiciliation, ciliary morphology, ciliary signaling, centrin accumulation inside cilia, and loss of rootlets at centrosomes with loss of centrosome cohesion. Increasing ARL2 activity or overexpressing Rootletin reversed these defects, revealing close functional links between the three proteins. This was further supported by the findings that deletion of Rootletin yielded similar phenotypes, which were rescued upon increasing ARL2 activity but not ELMOD2 overexpression. Thus, we propose that ARL2, ELMOD2, and Rootletin all act in a common pathway that suppresses spurious ciliation and maintains centrosome cohesion. Screening a number of markers of steps in the ciliation pathway supports a model in which ELMOD2, Rootletin, and ARL2 act downstream of TTBK2 and upstream of CP110 to prevent spurious release of CP110 and to regulate ciliary vesicle docking. These data thus provide evidence supporting roles for ELMOD2, Rootletin, and ARL2 in the regulation of ciliary licensing.
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Affiliation(s)
- Rachel E Turn
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322.,Biochemistry, Cell & Developmental Biology Graduate Program, Emory University, Atlanta, GA 30322
| | - Joshua Linnert
- Institut für Molekulare Physiologie, Johannes Gutenberg-Universität, Mainz 655099, Germany
| | - Eduardo D Gigante
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322.,Neuroscience Graduate Program, Emory University, Atlanta, GA 30322
| | - Uwe Wolfrum
- Institut für Molekulare Physiologie, Johannes Gutenberg-Universität, Mainz 655099, Germany
| | - Tamara Caspary
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322
| | - Richard A Kahn
- Department of Biochemistry, Emory University School of Medicine, Atlanta, GA 30322
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6
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Priyanga J, Guha G, Bhakta-Guha D. Microtubule motors in centrosome homeostasis: A target for cancer therapy? Biochim Biophys Acta Rev Cancer 2021; 1875:188524. [PMID: 33582170 DOI: 10.1016/j.bbcan.2021.188524] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 02/02/2021] [Accepted: 02/05/2021] [Indexed: 01/02/2023]
Abstract
Cancer is a grievous concern to human health, owing to a massive heterogeneity in its cause and impact. Dysregulation (numerical, positional and/or structural) of centrosomes is one of the notable factors among those that promote onset and progression of cancers. In a normal dividing cell, a pair of centrosomes forms two poles, thereby governing the formation of a bipolar spindle assembly. A large number of cancer cells, however, harbor supernumerary centrosomes, which mimic the bipolar arrangement in normal cells by centrosome clustering (CC) into two opposite poles, thus developing a pseudo-bipolar spindle assembly. Manipulation of centrosome homeostasis is the paramount pre-requisite for the evasive strategy of CC in cancers. Out of the varied factors that uphold centrosome integrity, microtubule motors (MiMos) play a critical role. Categorized as dyneins and kinesins, MiMos are involved in cohesion of centrosomes, and also facilitate the maintenance of the numerical, positional and structural integrity of centrosomes. Herein, we elucidate the decisive mechanisms undertaken by MiMos to mediate centrosome homeostasis, and how dysregulation of the same might lead to CC in cancer cells. Understanding the impact of MiMos on CC might open up avenues toward a credible therapeutic target against diverse cancers.
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Affiliation(s)
- J Priyanga
- Cellular Dyshomeostasis Laboratory (CDHL), School of Chemical and Bio Technology, SASTRA University, Thanjavur 613 401, Tamil Nadu, India
| | - Gunjan Guha
- Cellular Dyshomeostasis Laboratory (CDHL), School of Chemical and Bio Technology, SASTRA University, Thanjavur 613 401, Tamil Nadu, India.
| | - Dipita Bhakta-Guha
- Cellular Dyshomeostasis Laboratory (CDHL), School of Chemical and Bio Technology, SASTRA University, Thanjavur 613 401, Tamil Nadu, India.
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Zeng L, Fan X, Wang X, Deng H, Zhang X, Zhang K, He S, Li N, Han Q, Liu Z. Involvement of NEK2 and its interaction with NDC80 and CEP250 in hepatocellular carcinoma. BMC Med Genomics 2020; 13:158. [PMID: 33109182 PMCID: PMC7590453 DOI: 10.1186/s12920-020-00812-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2019] [Accepted: 06/25/2020] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND NEK2 has an established involvement in hepatocellular carcinoma (HCC) but the roles of NEK2 and its interacting proteins in HCC have not been systematically explored. METHODS This study examined NEK2 and its interacting proteins in HCC based on multiple databases. RESULTS NEK2 mRNA was highly expressed in HCC tissues compared with normal liver tissues. The survival of HCC patients with high NEK2 mRNA expression was shorter than those with low expression. MAD1L1, CEP250, MAPK1, NDC80, PPP1CA, PPP1R2 and NEK11 were the interacting proteins of NEK2. Among them, NDC80 and CEP250 were the key interacting proteins of NEK2. Mitotic prometaphase may be the key pathway that NEK2 and its interacting proteins contributed to HCC pathogenesis. NEK2, NDC80 and CEP250 mRNAs were highly expressed in HCC tissues compared with normal liver tissues. The mRNA levels of NEK2 were positively correlated with those of NDC80 or CEP250. Univariate regression showed that NEK2, NDC80 and CEP250 mRNA expressions were significantly associated with HCC patients' survival. Multivariate regression showed that NDC80 mRNA expression was an independent predictor for HCC patients' survival. Methylations and genetic alterations of NEK2, NDC80 and CEP250 were observed in HCC samples. The alterations of NEK2, NDC80 and CEP250 genes were co-occurrence. Patients with high mRNA expression and genetic alterations of NEK2, NDC80 and CEP250 had poor prognosis. CONCLUSIONS NEK2 and its interacting proteins NDC80 and CEP250 play important roles in HCC development and progression and thus may be potentially used as biomarkers and therapeutic targets of HCC.
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Affiliation(s)
- Lu Zeng
- Department of Infectious Diseases, First Affiliated Hospital of Xi’an Jiaotong University, No. 277 Yanta West Road, Xi’an, 710061 Shaanxi Province People’s Republic of China
- Xi’an Medical University, Xi’an, 710021 Shaanxi Province People’s Republic of China
| | - Xiude Fan
- Department of Infectious Diseases, First Affiliated Hospital of Xi’an Jiaotong University, No. 277 Yanta West Road, Xi’an, 710061 Shaanxi Province People’s Republic of China
| | - Xiaoyun Wang
- Department of Infectious Diseases, First Affiliated Hospital of Xi’an Jiaotong University, No. 277 Yanta West Road, Xi’an, 710061 Shaanxi Province People’s Republic of China
| | - Huan Deng
- Department of Infectious Diseases, First Affiliated Hospital of Xi’an Jiaotong University, No. 277 Yanta West Road, Xi’an, 710061 Shaanxi Province People’s Republic of China
| | - Xiaoge Zhang
- Department of Infectious Diseases, First Affiliated Hospital of Xi’an Jiaotong University, No. 277 Yanta West Road, Xi’an, 710061 Shaanxi Province People’s Republic of China
| | - Kun Zhang
- Department of Infectious Diseases, First Affiliated Hospital of Xi’an Jiaotong University, No. 277 Yanta West Road, Xi’an, 710061 Shaanxi Province People’s Republic of China
| | - Shan He
- Department of Infectious Diseases, First Affiliated Hospital of Xi’an Jiaotong University, No. 277 Yanta West Road, Xi’an, 710061 Shaanxi Province People’s Republic of China
- Xi’an Medical University, Xi’an, 710021 Shaanxi Province People’s Republic of China
| | - Na Li
- Department of Infectious Diseases, First Affiliated Hospital of Xi’an Jiaotong University, No. 277 Yanta West Road, Xi’an, 710061 Shaanxi Province People’s Republic of China
| | - Qunying Han
- Department of Infectious Diseases, First Affiliated Hospital of Xi’an Jiaotong University, No. 277 Yanta West Road, Xi’an, 710061 Shaanxi Province People’s Republic of China
| | - Zhengwen Liu
- Department of Infectious Diseases, First Affiliated Hospital of Xi’an Jiaotong University, No. 277 Yanta West Road, Xi’an, 710061 Shaanxi Province People’s Republic of China
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Nayak SC, Radha V. C3G localizes to mother centriole dependent on cenexin, and regulates centrosome duplication and primary cilia length. J Cell Sci 2020; 133:jcs.243113. [DOI: 10.1242/jcs.243113] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 04/06/2020] [Indexed: 01/01/2023] Open
Abstract
C3G (RapGEF1) plays a role in cell differentiation and is essential for early embryonic development in mice. In this study, we identify C3G as a centrosomal protein colocalizing with cenexin at the mother centriole in interphase cells. C3G interacts through its catalytic domain with cenexin, and they show interdependence for localization to the centrosome. C3G depletion caused a decrease in cellular cenexin levels. Centrosomal localization is lost as myocytes differentiate to form myotubes. Stable clone of cells depleted of C3G by CRISPR/Cas9 showed the presence of supernumerary centrioles. Overexpression of C3G, or a catalytically active deletion construct inhibited centrosome duplication. Cilia length is longer in C3G knockout cells, and the phenotype could be reverted upon reintroduction of C3G or its catalytic domain. Association of C3G with the basal body is dynamic, decreasing upon serum starvation, and increasing upon reentry into the cell cycle. C3G inhibits cilia formation and length dependent on its catalytic activity. We conclude that C3G inhibits centrosome duplication and maintains ciliary homeostasis, properties that may be important for its role in embryonic development.
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Affiliation(s)
- Sanjeev Chavan Nayak
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad – 500 007, India
| | - Vegesna Radha
- CSIR-Centre for Cellular and Molecular Biology, Uppal Road, Hyderabad – 500 007, India
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9
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Non-SMC Condensin I Complex Subunit D2 Is a Prognostic Factor in Triple-Negative Breast Cancer for the Ability to Promote Cell Cycle and Enhance Invasion. THE AMERICAN JOURNAL OF PATHOLOGY 2020; 190:37-47. [DOI: 10.1016/j.ajpath.2019.09.014] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2019] [Revised: 09/08/2019] [Accepted: 09/19/2019] [Indexed: 12/27/2022]
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10
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Wang Y, Wang F, He J, Du J, Zhang H, Shi H, Chen Y, Wei Y, Xue W, Yan J, Feng Y, Gao Y, Li D, Han J, Zhang J. miR-30a-3p Targets MAD2L1 and Regulates Proliferation of Gastric Cancer Cells. Onco Targets Ther 2019; 12:11313-11324. [PMID: 31908496 PMCID: PMC6927793 DOI: 10.2147/ott.s222854] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 11/27/2019] [Indexed: 12/24/2022] Open
Abstract
Purpose This study was done to investigate the inhibition effects of miR-30a-3p on mitotic arrest deficient 2 like 1 (MAD2L1) expression and the proliferation of gastric cancer cells. Patients and methods Cluster analysis and the TCGA database were used to screen the key genes highly expressed in gastric cancer. Based on the LinkedOmics website, the correlation between the miR-30a-3p and the cell cycle-related target gene MAD2L1 in gastric cancer was analyzed. The mRNA and protein expression levels were detected with the quantitative real-time PCR and Western blot analysis. The cell proliferation and cell cycle were also detected and analyzed. Results Bioinformatics analysis showed that MAD2L1 was highly expressed in tumor tissues compared with normal tissues. Compared with normal tissues, the miR-30a-3p was significantly decreased in the gastric cancer tissues. Moreover, MAD2L1 was significantly negatively correlated with the miR-30a-3p expression. Furthermore, over-expression of miR-30a-3p decreased the expression of MAD2L1 at the protein level, which inhibited the proliferation of AGS and BGC-823 gastric cancer cells. In addition, the cell cycles of AGS and BGC-823 cells were arrested at the G0/G1 phase. Conclusion MAD2L1 is a pro-oncogene which is up-regulated in gastric cancer. The miR-30a-3p can down-regulate the MAD2L1 expression, inhibiting the proliferation of gastric cancer cells and affect the cell cycle.
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Affiliation(s)
- Yu Wang
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Fenghui Wang
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Jing He
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Juan Du
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Huahua Zhang
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Haiyan Shi
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Yani Chen
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Yameng Wei
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Wanjuan Xue
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Jing Yan
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Yun Feng
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Yi Gao
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Dan Li
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Jiming Han
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
| | - Jing Zhang
- Department of Clinical Medicine, Medical College of Yan'an University, Yan'an, Shaanxi 716000, People's Republic of China.,Yan'an Key Laboratory of Chronic Disease Prevention and Research, Yan'an, Shaanxi 716000, People's Republic of China
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11
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Huang XF, Xiang L, Fang XL, Liu WQ, Zhuang YY, Chen ZJ, Shen RJ, Cheng W, Han RY, Zheng SS, Chen XJ, Liu X, Jin ZB. Functional characterization of CEP250 variant identified in nonsyndromic retinitis pigmentosa. Hum Mutat 2019; 40:1039-1045. [PMID: 30998843 DOI: 10.1002/humu.23759] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2018] [Revised: 03/16/2019] [Accepted: 04/02/2019] [Indexed: 12/29/2022]
Abstract
Retinitis pigmentosa (RP) is the most common manifestation of inherited retinal diseases with high degree of genetic, allelic, and phenotypic heterogeneity. CEP250 encodes the C-Nap1 protein and has been associated with various retinal phenotypes. Here, we report the identification of a mutation (c.562C>T, p.R188*) in the CEP250 in a consanguineous family with nonsyndromic RP. To gain insights into the molecular pathomechanism underlying CEP250 defects and the functional relevance of CEP250 variants in humans, we conducted a functional characterization of CEP250 variant using a novel Cep250 knockin mouse line. Remarkably, the disruption of Cep250 resulted in severe impairment of retinal function and significant retinal morphological alterations. The homozygous knockin mice showed significantly reduced retinal thickness and ERG responses. This study not only broadens the spectrum of phenotypes associated with CEP250 mutations, but also, for the first time, elucidates the function of CEP250 in photoreceptors using a newly established animal model.
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Affiliation(s)
- Xiu-Feng Huang
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - Lue Xiang
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - Xiao-Long Fang
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - Wei-Qin Liu
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - You-Yuan Zhuang
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - Zhen-Ji Chen
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - Ren-Juan Shen
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - Wan Cheng
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - Ru-Yi Han
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - Si-Si Zheng
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - Xue-Jiao Chen
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
| | - Xiaoling Liu
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
- Department of Medical Retina, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Zi-Bing Jin
- Division of Ophthalmic Genetics, The Eye Hospital, Wenzhou Medical University, Wenzhou, China
- State Key Laboratory of Ophthalmology, Optometry and Vision Science, National International Joint Research Center for Regenerative Medicine and Neurogenetics, Wenzhou Medical University, Wenzhou, China
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12
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Filipová A, Diaz Garcia D, Bezrouk A, Čížková D, Dvořák J, Filip S, Sturge J, Šinkorová Z. The toxic effect of cytostatics on primary cilia frequency and multiciliation. J Cell Mol Med 2019; 23:5728-5736. [PMID: 31207084 PMCID: PMC6652919 DOI: 10.1111/jcmm.14487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2019] [Revised: 04/30/2019] [Accepted: 05/20/2019] [Indexed: 01/04/2023] Open
Abstract
The primary cilium is considered as a key component of morphological cellular stability. However, cancer cells are notorious for lacking primary cilia in most cases, depending upon the tumour type. Previous reports have shown the effect of starvation and cytostatics on ciliogenesis in normal and cancer cells although with limited success, especially when concerning the latter. In this study, we evaluated the presence and frequency of primary cilia in breast fibroblasts and in triple-negative breast cancer cells after treatment with cytostatics finding that, in the case of breast fibroblasts, primary cilia were detected at their highest incidence 72 hours after treatment with 120 nM doxorubicin. Further, multiciliated cells were also detected after treatment with 80 nM doxorubicin. On the other hand, treatment with taxol increased the number of ciliated cells only at low concentrations (1.25 and 3.25 nM) and did not induce multiciliation. Interestingly, triple-negative breast cancer cells did not present primary cilia after treatment with either doxorubicin or taxol. This is the first study reporting the presence of multiple primary cilia in breast fibroblasts induced by doxorubicin. However, the null effect of these cytostatics on primary cilia incidence in the evaluated triple negative breast carcinomas cell lines requires further research.
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Affiliation(s)
- Alžběta Filipová
- Department of Radiobiology, Faculty of Military Health Sciences in Hradec Králové, University of Defence, Hradec Králové, Czech Republic
| | - Daniel Diaz Garcia
- Department of Clinical Biochemistry and Diagnostics, University Hospital, Hradec Králové, Czech Republic
| | - Aleš Bezrouk
- Department of Medical Biophysics, Faculty of Medicine, Charles University, Hradec Králové, Czech Republic
| | - Dana Čížková
- Department of Histology and Embryology, Faculty of Medicine, Charles University, Hradec Králové, Czech Republic
| | - Josef Dvořák
- Department of Oncology, Thomayer Hospital, Charles University, Prague, Czech Republic
| | - Stanislav Filip
- Department of Oncology and Radiotherapy, Faculty of Medicine, Charles University, Hradec Králové, Czech Republic
| | - Justin Sturge
- Department of Biomedical Sciences, Faculty of Health Sciences, University of Hull, Hull, UK
| | - Zuzana Šinkorová
- Department of Radiobiology, Faculty of Military Health Sciences in Hradec Králové, University of Defence, Hradec Králové, Czech Republic
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13
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Remo A, Manfrin E, Parcesepe P, Ferrarini A, Han HS, Mickys U, Laudanna C, Simbolo M, Malanga D, Oliveira DM, Baritono E, Colangelo T, Sabatino L, Giuliani J, Molinari E, Garonzi M, Xumerle L, Delledonne M, Giordano G, Ghimenton C, Lonardo F, D'angelo F, Grillo F, Mastracci L, Viglietto G, Ceccarelli M, Colantuoni V, Scarpa A, Pancione M. Centrosome Linker-induced Tetraploid Segregation Errors Link Rhabdoid Phenotypes and Lethal Colorectal Cancers. Mol Cancer Res 2018; 16:1385-1395. [PMID: 29784668 DOI: 10.1158/1541-7786.mcr-18-0062] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/06/2018] [Accepted: 05/01/2018] [Indexed: 02/05/2023]
Abstract
Centrosome anomalies contribute to tumorigenesis, but it remains unclear how they are generated in lethal cancer phenotypes. Here, it is demonstrated that human microsatellite instable (MSI) and BRAFV600E-mutant colorectal cancers with a lethal rhabdoid phenotype are characterized by inactivation of centrosomal functions. A splice site mutation that causes an unbalanced dosage of rootletin (CROCC), a centrosome linker component required for centrosome cohesion and separation at the chromosome 1p36.13 locus, resulted in abnormally shaped centrosomes in rhabdoid cells from human colon tissues. Notably, deleterious deletions at 1p36.13 were recurrent in a subgroup of BRAFV600E-mutant and microsatellite stable (MSS) rhabdoid colorectal cancers, but not in classical colorectal cancer or pediatric rhabdoid tumors. Interfering with CROCC expression in near-diploid BRAFV600E-mutant/MSI colon cancer cells disrupts bipolar mitotic spindle architecture, promotes tetraploid segregation errors, resulting in a highly aggressive rhabdoid-like phenotype in vitro Restoring near-wild-type levels of CROCC in a metastatic model harboring 1p36.13 deletion results in correction of centrosome segregation errors and cell death, revealing a mechanism of tolerance to mitotic errors and tetraploidization promoted by deleterious 1p36.13 loss. Accordingly, cancer cells lacking 1p36.13 display far greater sensitivity to centrosome spindle pole stabilizing agents in vitro These data shed light on a previously unknown link between centrosome cohesion defects and lethal cancer phenotypes providing new insight into pathways underlying genome instability.Implications: Mis-segregation of chromosomes is a prominent feature of chromosome instability and intratumoral heterogeneity recurrent in metastatic tumors for which the molecular basis is unknown. This study provides insight into the mechanism by which defects in rootletin, a centrosome linker component causes tetraploid segregation errors and phenotypic transition to a clinically devastating form of malignant rhabdoid tumor. Mol Cancer Res; 16(9); 1385-95. ©2018 AACR.
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Affiliation(s)
- Andrea Remo
- Pathology Unit, "Mater Salutis" Hospital AULSS9, Legnago (Verona), Italy
| | - Erminia Manfrin
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, Verona, Italy
| | - Pietro Parcesepe
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, Verona, Italy
| | | | - Hye Seung Han
- Department of Pathology, Konkuk University School of Medicine, Seoul, Korea
| | - Ugnius Mickys
- National Center of Pathology, Affiliate of Vilnius University Hospital Santariskiu Clinics, Vilnius, Lithuania
| | - Carmelo Laudanna
- Department of Experimental and Clinical Medicine "Gaetano Salvatore", University "Magna Grecia", Catanzaro, Italy
| | - Michele Simbolo
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, Verona, Italy
| | - Donatella Malanga
- Department of Experimental and Clinical Medicine "Gaetano Salvatore", University "Magna Grecia", Catanzaro, Italy
| | - Duarte Mendes Oliveira
- Department of Experimental and Clinical Medicine "Gaetano Salvatore", University "Magna Grecia", Catanzaro, Italy
| | | | - Tommaso Colangelo
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Casa Sollievo della Sofferenza-IRCCS, San Giovanni Rotondo, Italy
| | - Lina Sabatino
- Department of Sciences and Technologies, University of Sannio, Benevento, Italy
| | - Jacopo Giuliani
- Pathology Unit, "Mater Salutis" Hospital AULSS9, Legnago (Verona), Italy
| | - Enrico Molinari
- Pathology Unit, "Mater Salutis" Hospital AULSS9, Legnago (Verona), Italy
| | - Marianna Garonzi
- Functional Genomics Center, Department of Biotechnology, University of Verona, Verona, Italy
| | - Luciano Xumerle
- Functional Genomics Center, Department of Biotechnology, University of Verona, Verona, Italy
| | - Massimo Delledonne
- Functional Genomics Center, Department of Biotechnology, University of Verona, Verona, Italy
- Personal Genomics S.r.l., Verona, Italy
| | - Guido Giordano
- CRO Aviano National Cancer Center, Aviano, Italy
- Medical Oncology Unit, San Filippo Neri Hospital, Rome, Italy
| | - Claudio Ghimenton
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, Verona, Italy
| | - Fortunato Lonardo
- Medical Cytogenetics and Molecular Genetics Unit, AORN "Gaetano Rummo," Benevento, Italy
| | - Fulvio D'angelo
- Bioinformatics Laboratory, BIOGEM scrl, Ariano Irpino, Avellino, Italy
| | - Federica Grillo
- Department of Surgical and Diagnostic Sciences (DISC), University of Genova and S. Martino Polyclinic Hospital, Genova, Italy
| | - Luca Mastracci
- Department of Surgical and Diagnostic Sciences (DISC), University of Genova and S. Martino Polyclinic Hospital, Genova, Italy
| | - Giuseppe Viglietto
- Department of Experimental and Clinical Medicine "Gaetano Salvatore", University "Magna Grecia", Catanzaro, Italy
| | - Michele Ceccarelli
- Department of Sciences and Technologies, University of Sannio, Benevento, Italy
- Bioinformatics Laboratory, BIOGEM scrl, Ariano Irpino, Avellino, Italy
| | - Vittorio Colantuoni
- Department of Sciences and Technologies, University of Sannio, Benevento, Italy
| | - Aldo Scarpa
- Department of Diagnostics and Public Health, Section of Pathology, University and Hospital Trust of Verona, Verona, Italy.
- ARC-Net Centre for Applied Research on Cancer, University and Hospital Trust of Verona, Verona, Italy
| | - Massimo Pancione
- Department of Sciences and Technologies, University of Sannio, Benevento, Italy.
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Complutense University, Madrid, Spain
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14
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Prakash A, Garcia-Moreno JF, Brown JAL, Bourke E. Clinically Applicable Inhibitors Impacting Genome Stability. Molecules 2018; 23:E1166. [PMID: 29757235 PMCID: PMC6100577 DOI: 10.3390/molecules23051166] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 04/27/2018] [Accepted: 05/01/2018] [Indexed: 12/14/2022] Open
Abstract
Advances in technology have facilitated the molecular profiling (genomic and transcriptomic) of tumours, and has led to improved stratification of patients and the individualisation of treatment regimes. To fully realize the potential of truly personalised treatment options, we need targeted therapies that precisely disrupt the compensatory pathways identified by profiling which allow tumours to survive or gain resistance to treatments. Here, we discuss recent advances in novel therapies that impact the genome (chromosomes and chromatin), pathways targeted and the stage of the pathways targeted. The current state of research will be discussed, with a focus on compounds that have advanced into trials (clinical and pre-clinical). We will discuss inhibitors of specific DNA damage responses and other genome stability pathways, including those in development, which are likely to synergistically combine with current therapeutic options. Tumour profiling data, combined with the knowledge of new treatments that affect the regulation of essential tumour signalling pathways, is revealing fundamental insights into cancer progression and resistance mechanisms. This is the forefront of the next evolution of advanced oncology medicine that will ultimately lead to improved survival and may, one day, result in many cancers becoming chronic conditions, rather than fatal diseases.
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Affiliation(s)
- Anu Prakash
- Discipline of Pathology, Lambe Institute for Translational Research, School of Medicine, National University of Ireland Galway, H91 YR71 Galway, Ireland.
| | - Juan F Garcia-Moreno
- Discipline of Surgery, Lambe Institute for Translational Research, School of Medicine, National University of Ireland Galway, H91 YR71 Galway, Ireland.
| | - James A L Brown
- Discipline of Surgery, Lambe Institute for Translational Research, School of Medicine, National University of Ireland Galway, H91 YR71 Galway, Ireland.
| | - Emer Bourke
- Discipline of Pathology, Lambe Institute for Translational Research, School of Medicine, National University of Ireland Galway, H91 YR71 Galway, Ireland.
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15
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El Shamieh S, Méjécase C, Bertelli M, Terray A, Michiels C, Condroyer C, Fouquet S, Sadoun M, Clérin E, Liu B, Léveillard T, Goureau O, Sahel JA, Audo I, Zeitz C. Further Insights into the Ciliary Gene and Protein KIZ and Its Murine Ortholog PLK1S1 Mutated in Rod-Cone Dystrophy. Genes (Basel) 2017; 8:genes8100277. [PMID: 29057815 PMCID: PMC5664127 DOI: 10.3390/genes8100277] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2017] [Revised: 10/04/2017] [Accepted: 10/06/2017] [Indexed: 11/16/2022] Open
Abstract
We identified herein additional patients with rod-cone dystrophy (RCD) displaying mutations in KIZ, encoding the ciliary centrosomal protein kizuna and performed functional characterization of the respective protein in human fibroblasts and of its mouse ortholog PLK1S1 in the retina. Mutation screening was done by targeted next generation sequencing and subsequent Sanger sequencing validation. KIZ mRNA levels were assessed on blood and serum-deprived human fibroblasts from a control individual and a patient, compound heterozygous for the c.52G>T (p.Glu18*) and c.119_122del (p.Lys40Ilefs*14) mutations in KIZ. KIZ localization, documentation of cilium length and immunoblotting were performed in these two fibroblast cell lines. In addition, PLK1S1 immunolocalization was conducted in mouse retinal cryosections and isolated rod photoreceptors. Analyses of additional RCD patients enabled the identification of two homozygous mutations in KIZ, the known c.226C>T (p.Arg76*) mutation and a novel variant, the c.3G>A (p.Met1?) mutation. Albeit the expression levels of KIZ were three-times lower in the patient than controls in whole blood cells, further analyses in control- and mutant KIZ patient-derived fibroblasts unexpectedly revealed no significant difference between the two genotypes. Furthermore, the averaged monocilia length in the two fibroblast cell lines was similar, consistent with the preserved immunolocalization of KIZ at the basal body of the primary cilia. Analyses in mouse retina and isolated rod photoreceptors showed PLK1S1 localization at the base of the photoreceptor connecting cilium. In conclusion, two additional patients with mutations in KIZ were identified, further supporting that defects in KIZ/PLK1S1, detected at the basal body of the primary cilia in fibroblasts, and the photoreceptor connecting cilium in mouse, respectively, are involved in RCD. However, albeit the mutations were predicted to lead to nonsense mediated mRNA decay, we could not detect changes upon expression levels, protein localization or cilia length in KIZ-mutated fibroblast cells. Together, our findings unveil the limitations of fibroblasts as a cellular model for RCD and call for other models such as induced pluripotent stem cells to shed light on retinal pathogenic mechanisms of KIZ mutations.
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Affiliation(s)
- Said El Shamieh
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
- Department of Medical Laboratory Technology, Faculty of Health Sciences, Beirut Arab University, 115020 Beirut, Lebanon.
| | - Cécile Méjécase
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
| | | | - Angélique Terray
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
| | - Christelle Michiels
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
| | - Christel Condroyer
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
| | - Stéphane Fouquet
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
| | - Maxime Sadoun
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
| | - Emmanuelle Clérin
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
| | - Binqian Liu
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
| | - Thierry Léveillard
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
| | - Olivier Goureau
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
| | - José-Alain Sahel
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
- Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, DHU Sight Restore, INSERM-DHOS CIC 1423, 75012 Paris, France.
- Fondation Ophtalmologique Adolphe de Rothschild, 75019 Paris, France.
- Académie des Sciences-Institut de France, 75006 Paris, France.
- Department of Ophthalmology, The University of Pittsburgh School of Medicine, Pittsburg, PA 15213, USA.
- Institute of Ophthalmology, University College of London, London, EC1V 9EL, UK.
| | - Isabelle Audo
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
- Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, DHU Sight Restore, INSERM-DHOS CIC 1423, 75012 Paris, France.
- Institute of Ophthalmology, University College of London, London, EC1V 9EL, UK.
| | - Christina Zeitz
- Sorbonne Universités, UPMC University Paris 06, INSERM U968, CNRS UMR 7210, Institut de la Vision, 75012 Paris, France.
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16
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Loukil A, Tormanen K, Sütterlin C. The daughter centriole controls ciliogenesis by regulating Neurl-4 localization at the centrosome. J Cell Biol 2017; 216:1287-1300. [PMID: 28385950 PMCID: PMC5412565 DOI: 10.1083/jcb.201608119] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Revised: 12/29/2016] [Accepted: 02/28/2017] [Indexed: 12/26/2022] Open
Abstract
During ciliogenesis, the daughter centriole is found next to the mother, but its role in this process is not known. Loukil et al. show that a daughter centriole is necessary for primary cilia formation by promoting Neurl-4–dependent removal of the negative ciliogenesis regulator CP110 from the mother. The two centrioles of the centrosome differ in age and function. Although the mother centriole mediates most centrosome-dependent processes, the role of the daughter remains poorly understood. A recent study has implicated the daughter centriole in centriole amplification in multiciliated cells, but its contribution to primary ciliogenesis is unclear. We found that manipulations that prevent daughter centriole formation or induce its separation from the mother abolish ciliogenesis. This defect was caused by stabilization of the negative ciliogenesis regulator CP110 and was corrected by CP110 depletion. CP110 dysregulation may be caused by effects on Neurl-4, a daughter centriole–associated ubiquitin ligase cofactor, which was required for ciliogenesis. Centrosome-targeted Neurl-4 was sufficient to restore ciliogenesis in cells with manipulated daughter centrioles. Interestingly, early during ciliogenesis, Neurl-4 transiently associated with the mother centriole in a process that required mother–daughter centriole proximity. Our data support a model in which the daughter centriole promotes ciliogenesis through Neurl-4–dependent regulation of CP110 levels at the mother centriole.
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Affiliation(s)
- Abdelhalim Loukil
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA 92697
| | - Kati Tormanen
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA 92697
| | - Christine Sütterlin
- Department of Developmental and Cell Biology, University of California, Irvine, Irvine, CA 92697
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17
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Flanagan AM, Stavenschi E, Basavaraju S, Gaboriau D, Hoey DA, Morrison CG. Centriole splitting caused by loss of the centrosomal linker protein C-NAP1 reduces centriolar satellite density and impedes centrosome amplification. Mol Biol Cell 2017; 28:736-745. [PMID: 28100636 PMCID: PMC5349781 DOI: 10.1091/mbc.e16-05-0325] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 01/10/2017] [Accepted: 01/11/2017] [Indexed: 12/24/2022] Open
Abstract
Duplication of the centrosomes is a tightly regulated process. Abnormal centrosome numbers can impair cell division and cause changes in how cells migrate. Duplicated centrosomes are held together by a proteinaceous linker made up of rootletin filaments anchored to the centrioles by C-NAP1. This linker is removed in a NEK2A kinase-dependent manner as mitosis begins. To explore C-NAP1 activities in regulating centrosome activities, we used genome editing to ablate it. C-NAP1-null cells were viable and had an increased frequency of premature centriole separation, accompanied by reduced density of the centriolar satellites, with reexpression of C-NAP1 rescuing both phenotypes. We found that the primary cilium, a signaling structure that arises from the mother centriole docked to the cell membrane, was intact in the absence of C-NAP1, although components of the ciliary rootlet were aberrantly localized away from the base of the cilium. C-NAP1-deficient cells were capable of signaling through the cilium, as determined by gene expression analysis after fluid flow-induced shear stress and the relocalization of components of the Hedgehog pathway. Centrosome amplification induced by DNA damage or by PLK4 or CDK2 overexpression was markedly reduced in the absence of C-NAP1. We conclude that centriole splitting reduces the local density of key centriolar precursors to impede overduplication.
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Affiliation(s)
- Anne-Marie Flanagan
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Elena Stavenschi
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, and
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin 2, Ireland
| | - Shivakumar Basavaraju
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - David Gaboriau
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - David A Hoey
- Trinity Centre for Bioengineering, Trinity Biomedical Sciences Institute, and
- Department of Mechanical and Manufacturing Engineering, School of Engineering, Trinity College Dublin, Dublin 2, Ireland
- Advanced Materials and Bioengineering Research Centre, Trinity College Dublin, and Royal College of Surgeons in Ireland, Dublin 2, Ireland
| | - Ciaran G Morrison
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
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18
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Abstract
Here, we review how DNA damage affects the centrosome and how centrosomes communicate with the DNA damage response (DDR) apparatus. We discuss how several proteins of the DDR are found at centrosomes, including the ATM, ATR, CHK1 and CHK2 kinases, the BRCA1 ubiquitin ligase complex and several members of the poly(ADP-ribose) polymerase family. Stereotypical centrosome organisation, in which two centriole barrels are orthogonally arranged in a roughly toroidal pericentriolar material (PCM), is strongly affected by exposure to DNA-damaging agents. We describe the genetic dependencies and mechanisms for how the centrioles lose their close association, and the PCM both expands and distorts after DNA damage. Another consequence of genotoxic stress is that centrosomes undergo duplication outside the normal cell cycle stage, meaning that centrosome amplification is commonly seen after DNA damage. We discuss several potential mechanisms for how centrosome numbers become dysregulated after DNA damage and explore the links between the DDR and the PLK1- and separase-dependent mechanisms that drive centriole separation and reduplication. We also describe how centrosome components, such as centrin2, are directly involved in responding to DNA damage. This review outlines current questions on the involvement of centrosomes in the DDR.
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Affiliation(s)
- Lisa I Mullee
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Biosciences Building, Dangan, Galway, Ireland
| | - Ciaran G Morrison
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Biosciences Building, Dangan, Galway, Ireland.
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19
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The bornavirus-derived human protein EBLN1 promotes efficient cell cycle transit, microtubule organisation and genome stability. Sci Rep 2016; 6:35548. [PMID: 27739501 PMCID: PMC5064366 DOI: 10.1038/srep35548] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2016] [Accepted: 09/30/2016] [Indexed: 12/24/2022] Open
Abstract
It was recently discovered that vertebrate genomes contain multiple endogenised nucleotide sequences derived from the non-retroviral RNA bornavirus. Strikingly, some of these elements have been evolutionary maintained as open reading frames in host genomes for over 40 million years, suggesting that some endogenised bornavirus-derived elements (EBL) might encode functional proteins. EBLN1 is one such element established through endogenisation of the bornavirus N gene (BDV N). Here, we functionally characterise human EBLN1 as a novel regulator of genome stability. Cells depleted of human EBLN1 accumulate DNA damage both under non-stressed conditions and following exogenously induced DNA damage. EBLN1-depleted cells also exhibit cell cycle abnormalities and defects in microtubule organisation as well as premature centrosome splitting, which we attribute in part, to improper localisation of the nuclear envelope protein TPR. Our data therefore reveal that human EBLN1 possesses important cellular functions within human cells, and suggest that other EBLs present within vertebrate genomes may also possess important cellular functions.
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20
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Nechipurenko IV, Olivier-Mason A, Kazatskaya A, Kennedy J, McLachlan IG, Heiman MG, Blacque OE, Sengupta P. A Conserved Role for Girdin in Basal Body Positioning and Ciliogenesis. Dev Cell 2016; 38:493-506. [PMID: 27623382 PMCID: PMC5023068 DOI: 10.1016/j.devcel.2016.07.013] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 03/09/2016] [Accepted: 07/17/2016] [Indexed: 01/16/2023]
Abstract
Primary cilia are ubiquitous sensory organelles that mediate diverse signaling pathways. Cilia position on the cell surface is determined by the location of the basal body (BB) that templates the cilium. The mechanisms that regulate BB positioning in the context of ciliogenesis are largely unknown. Here we show that the conserved signaling and scaffolding protein Girdin localizes to the proximal regions of centrioles and regulates BB positioning and ciliogenesis in Caenorhabditis elegans sensory neurons and human RPE-1 cells. Girdin depletion alters localization of the intercentriolar linker and ciliary rootlet component rootletin, and rootletin knockdown in RPE-1 cells mimics Girdin-dependent phenotypes. C. elegans Girdin also regulates localization of the apical junction component AJM-1, suggesting that in nematodes Girdin may position BBs via rootletin- and AJM-1-dependent anchoring to the cytoskeleton and plasma membrane, respectively. Together, our results describe a conserved role for Girdin in BB positioning and ciliogenesis.
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Affiliation(s)
- Inna V Nechipurenko
- Department of Biology and National Center for Behavioral Genomics, Brandeis University, Waltham, MA 02454, USA.
| | - Anique Olivier-Mason
- Department of Biology and National Center for Behavioral Genomics, Brandeis University, Waltham, MA 02454, USA
| | - Anna Kazatskaya
- Department of Biology and National Center for Behavioral Genomics, Brandeis University, Waltham, MA 02454, USA
| | - Julie Kennedy
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Ian G McLachlan
- Department of Genetics, Harvard Medical School and Boston Children's Hospital, Boston, MA 02115, USA
| | - Maxwell G Heiman
- Department of Genetics, Harvard Medical School and Boston Children's Hospital, Boston, MA 02115, USA
| | - Oliver E Blacque
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Piali Sengupta
- Department of Biology and National Center for Behavioral Genomics, Brandeis University, Waltham, MA 02454, USA.
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21
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Xu M, Stattin EL, Shaw G, Heinegård D, Sullivan G, Wilmut I, Colman A, Önnerfjord P, Khabut A, Aspberg A, Dockery P, Hardingham T, Murphy M, Barry F. Chondrocytes Derived From Mesenchymal Stromal Cells and Induced Pluripotent Cells of Patients With Familial Osteochondritis Dissecans Exhibit an Endoplasmic Reticulum Stress Response and Defective Matrix Assembly. Stem Cells Transl Med 2016; 5:1171-81. [PMID: 27388238 DOI: 10.5966/sctm.2015-0384] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Accepted: 03/16/2016] [Indexed: 11/16/2022] Open
Abstract
UNLABELLED : Familial osteochondritis dissecans (FOCD) is an inherited skeletal defect characterized by the development of large cartilage lesions in multiple joints, short stature, and early onset of severe osteoarthritis. It is associated with a heterozygous mutation in the ACAN gene, resulting in a Val-Met replacement in the C-type lectin domain of aggrecan. To understand the cellular pathogenesis of this condition, we studied the chondrogenic differentiation of patient bone marrow mesenchymal stromal cells (BM-MSCs). We also looked at cartilage derived from induced pluripotent stem cells (iPSCs) generated from patient fibroblasts. Our results revealed several characteristics of the differentiated chondrocytes that help to explain the disease phenotype and susceptibility to cartilage injury. First, patient chondrogenic pellets had poor structural integrity but were rich in glycosaminoglycan. Second, it was evident that large amounts of aggrecan accumulated within the endoplasmic reticulum of chondrocytes differentiated from both BM-MSCs and iPSCs. In turn, there was a marked absence of aggrecan in the extracellular matrix. Third, it was evident that matrix synthesis and assembly were globally dysregulated. These results highlight some of the abnormal aspects of chondrogenesis in these patient cells and help to explain the underlying cellular pathology. The results suggest that FOCD is a chondrocyte aggrecanosis with associated matrix dysregulation. The work provides a new in vitro model of osteoarthritis and cartilage degeneration based on the use of iPSCs and highlights how insights into disease phenotype and pathogenesis can be uncovered by studying differentiation of patient stem cells. SIGNIFICANCE The isolation and study of patient stem cells and the development of methods for the generation of iPSCs have opened up exciting opportunities in understanding causes and exploring new treatments for major diseases. This technology was used to unravel the cellular phenotype in a severe form of inherited osteoarthritis, termed familial osteochondritis dissecans. The phenotypic abnormalities that give rise to cartilage lesions in these patients were able to be described via the generation of chondrocytes from bone marrow-derived mesenchymal stromal cells and iPSCs, illustrating the extraordinary value of these approaches in disease modeling.
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Affiliation(s)
- Maojia Xu
- Regenerative Medicine Institute, National University of Ireland Galway, Galway, Ireland
| | - Eva-Lena Stattin
- Department of Immunology, Genetics, and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Georgina Shaw
- Regenerative Medicine Institute, National University of Ireland Galway, Galway, Ireland
| | - Dick Heinegård
- Department of Clinical Sciences, Rheumatology, and Molecular Skeletal Biology, Lund University, Lund, Sweden
| | | | - Ian Wilmut
- Medical Research Council Centre for Regenerative Medicine, University of Edinburgh, Edinburgh, United Kingdom
| | - Alan Colman
- A*STAR Institute of Medical Biology, Singapore
| | - Patrik Önnerfjord
- Department of Clinical Sciences, Rheumatology, and Molecular Skeletal Biology, Lund University, Lund, Sweden
| | - Areej Khabut
- Department of Clinical Sciences, Rheumatology, and Molecular Skeletal Biology, Lund University, Lund, Sweden
| | - Anders Aspberg
- Department of Clinical Sciences, Rheumatology, and Molecular Skeletal Biology, Lund University, Lund, Sweden
| | - Peter Dockery
- Anatomy, School of Medicine, National University of Ireland Galway, Galway, Ireland
| | - Timothy Hardingham
- Wellcome Trust Centre for Cell-Matrix Research, Faculty of Life Sciences University of Manchester, Manchester, United Kingdom
| | - Mary Murphy
- Regenerative Medicine Institute, National University of Ireland Galway, Galway, Ireland
| | - Frank Barry
- Regenerative Medicine Institute, National University of Ireland Galway, Galway, Ireland
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22
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Martino J, Holmes AL, Xie H, Wise SS, Wise JP. Chronic Exposure to Particulate Chromate Induces Premature Centrosome Separation and Centriole Disengagement in Human Lung Cells. Toxicol Sci 2015; 147:490-9. [PMID: 26293554 PMCID: PMC4635651 DOI: 10.1093/toxsci/kfv146] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Particulate hexavalent chromium (Cr(VI)) is a well-established human lung carcinogen. Lung tumors are characterized by structural and numerical chromosome instability. Centrosome amplification is a phenotype commonly found in solid tumors, including lung tumors, which strongly correlates with chromosome instability. Human lung cells exposed to Cr(VI) exhibit centrosome amplification but the underlying phenotypes and mechanisms remain unknown. In this study, we further characterize the phenotypes of Cr(VI)-induced centrosome abnormalities. We show that Cr(VI)-induced centrosome amplification correlates with numerical chromosome instability. We also show chronic exposure to particulate Cr(VI) induces centrosomes with supernumerary centrioles and acentriolar centrosomes in human lung cells. Moreover, chronic exposure to particulate Cr(VI) affects the timing of important centriolar events. Specifically, chronic exposure to particulate Cr(VI) causes premature centriole disengagement in S and G2 phase cells. It also induces premature centrosome separation in interphase. Altogether, our data suggest that chronic exposure to particulate Cr(VI) targets the protein linkers that hold centrioles together. These centriolar linkers are important for key events of the centrosome cycle and their premature disruption might underlie Cr(VI)-induced centrosome amplification.
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Affiliation(s)
- Julieta Martino
- *Wise Laboratory of Environmental and Genetic Toxicology and Department of Applied Medical Sciences, Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04104; and
| | - Amie L Holmes
- *Wise Laboratory of Environmental and Genetic Toxicology and Department of Applied Medical Sciences, Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04104; and
| | - Hong Xie
- *Wise Laboratory of Environmental and Genetic Toxicology and Department of Applied Medical Sciences, Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04104; and
| | - Sandra S Wise
- *Wise Laboratory of Environmental and Genetic Toxicology and Department of Applied Medical Sciences, Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04104; and Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40068
| | - John Pierce Wise
- *Wise Laboratory of Environmental and Genetic Toxicology and Department of Applied Medical Sciences, Maine Center for Toxicology and Environmental Health, University of Southern Maine, Portland, Maine 04104; and Department of Pharmacology and Toxicology, University of Louisville, Louisville, Kentucky 40068
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23
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Breslin L, Prosser SL, Cuffe S, Morrison CG. Ciliary abnormalities in senescent human fibroblasts impair proliferative capacity. Cell Cycle 2015; 13:2773-9. [PMID: 25486364 DOI: 10.4161/15384101.2015.945868] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Somatic cells senesce in culture after a finite number of divisions indefinitely arresting their proliferation. DNA damage and senescence increase the cellular number of centrosomes, the 2 microtubule organizing centers that ensure bipolar mitotic spindles. Centrosomes also provide the basal body from which primary cilia extend to sense and transduce various extracellular signals, notably Hedgehog. Primary cilium formation is facilitated by cellular quiescence a temporary cell cycle exit, but the impact of senescence on cilia is unknown. We found that senescent human fibroblasts have increased frequency and length of primary cilia. Levels of the negative ciliary regulator CP110 were reduced in senescent cells, as were levels of key elements of the Hedgehog pathway. Hedgehog inhibition reduced proliferation in young cells with increased cilium length accompanying cell cycle arrest suggesting a regulatory function for Hedgehog in primary ciliation. Depletion of CP110 in young cell populations increased ciliation frequencies and reduced cell proliferation. These data suggest that primary cilia are potentially novel determinants of the reduced cellular proliferation that initiates senescence.
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Key Words
- CP110
- CP110, centriolar coiled coil protein of 110kDa
- DABCO, 1,4-Diazabicyclo[2.2.2]octane
- DAPI, 4′,6-diamidino-2-phenylindole
- ECL, enhanced chemiluminescence
- FITC, Fluorescein isothiocyanate
- GAPDH, glyceraldehyde 3-phosphate dehydrogenase
- HMEC, human mammary epithelial cell
- Hedgehog
- Hh, Hedgehog
- NHDF, normal human dermal fibroblasts
- PLK4, Polo-like kinase 4
- SA-β-gal, senescence-associated β-galactosidase
- SAHF, senescence-associated heterochromatin foci
- Smo, smoothened
- centrosome
- primary cilium
- replicative senescence
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Affiliation(s)
- Loretta Breslin
- a Center for Chromosome Biology; School of Natural Sciences ; National University of Ireland Galway ; Galway , Ireland
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24
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C-Nap1 mutation affects centriole cohesion and is associated with a Seckel-like syndrome in cattle. Nat Commun 2015; 6:6894. [PMID: 25902731 PMCID: PMC4423223 DOI: 10.1038/ncomms7894] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Accepted: 03/11/2015] [Indexed: 12/11/2022] Open
Abstract
Caprine-like Generalized Hypoplasia Syndrome (SHGC) is an autosomal-recessive disorder in Montbéliarde cattle. Affected animals present a wide range of clinical features that include the following: delayed development with low birth weight, hind limb muscular hypoplasia, caprine-like thin head and partial coat depigmentation. Here we show that SHGC is caused by a truncating mutation in the CEP250 gene that encodes the centrosomal protein C-Nap1. This mutation results in centrosome splitting, which neither affects centriole ultrastructure and duplication in dividing cells nor centriole function in cilium assembly and mitotic spindle organization. Loss of C-Nap1-mediated centriole cohesion leads to an altered cell migration phenotype. This discovery extends the range of loci that constitute the spectrum of autosomal primary recessive microcephaly (MCPH) and Seckel-like syndromes.
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25
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Filipová A, Diaz-Garcia D, Bezrouk A, Čížková D, Havelek R, Vávrová J, Dayanithi G, Řezacová M. Ionizing radiation increases primary cilia incidence and induces multiciliation in C2C12 myoblasts. Cell Biol Int 2015; 39:943-53. [DOI: 10.1002/cbin.10462] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 03/10/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Alžběta Filipová
- Department of Medical Biochemistry; Faculty of Medicine, Charles University in Prague; Sokolská 581 500 05 Hradec Králové Czech Republic
| | - Daniel Diaz-Garcia
- Department of Histology and Embryology; Faculty of Medicine, Charles University in Prague; Hradec Králové Czech Republic
| | - Aleš Bezrouk
- Department of Medical Biophysics; Faculty of Medicine, Charles University in Prague; Hradec Králové Czech Republic
| | - Dana Čížková
- Department of Histology and Embryology; Faculty of Medicine, Charles University in Prague; Hradec Králové Czech Republic
| | - Radim Havelek
- Department of Medical Biochemistry; Faculty of Medicine, Charles University in Prague; Sokolská 581 500 05 Hradec Králové Czech Republic
| | - Jiřina Vávrová
- Department of Radiobiology, Faculty of Military Health Sciences; University of Defence; Hradec Králové Czech Republic
| | - Govindan Dayanithi
- Department of Molecular Neurophysiology, Institute of Experimental Medicine; Czech Academy of Sciences; Videnska 1083 142 20 Prague Czech Republic
- Institut National de la Santé et de la Recherche Médicale U1198; Université Montpellier; Montpellier France
- Ecole Pratique des Hautes Etudes-Sorbonne; Paris France
| | - Martina Řezacová
- Department of Medical Biochemistry; Faculty of Medicine, Charles University in Prague; Sokolská 581 500 05 Hradec Králové Czech Republic
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26
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Di Gioia SA, Farinelli P, Letteboer SJF, Arsenijevic Y, Sharon D, Roepman R, Rivolta C. Interactome analysis reveals that FAM161A, deficient in recessive retinitis pigmentosa, is a component of the Golgi-centrosomal network. Hum Mol Genet 2015; 24:3359-71. [PMID: 25749990 DOI: 10.1093/hmg/ddv085] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2014] [Accepted: 03/04/2015] [Indexed: 11/13/2022] Open
Abstract
Defects in FAM161A, a protein of unknown function localized at the cilium of retinal photoreceptor cells, cause retinitis pigmentosa, a form of hereditary blindness. By using different fragments of this protein as baits to screen cDNA libraries of human and bovine retinas, we defined a yeast two-hybrid-based FAM161A interactome, identifying 53 bona fide partners. In addition to statistically significant enrichment in ciliary proteins, as expected, this interactome revealed a substantial bias towards proteins from the Golgi apparatus, the centrosome and the microtubule network. Validation of interaction with key partners by co-immunoprecipitation and proximity ligation assay confirmed that FAM161A is a member of the recently recognized Golgi-centrosomal interactome, a network of proteins interconnecting Golgi maintenance, intracellular transport and centrosome organization. Notable FAM161A interactors included AKAP9, FIP3, GOLGA3, KIFC3, KLC2, PDE4DIP, NIN and TRIP11. Furthermore, analysis of FAM161A localization during the cell cycle revealed that this protein followed the centrosome during all stages of mitosis, likely reflecting a specific compartmentalization related to its role at the ciliary basal body during the G0 phase. Altogether, these findings suggest that FAM161A's activities are probably not limited to ciliary tasks but also extend to more general cellular functions, highlighting possible novel mechanisms for the molecular pathology of retinal disease.
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Affiliation(s)
| | - Pietro Farinelli
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
| | - Stef J F Letteboer
- Department of Human Genetics and Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands and
| | - Yvan Arsenijevic
- Unit of Gene Therapy and Stem Cell Biology, Jules-Gonin Eye Hospital, University of Lausanne, Lausanne, Switzerland
| | - Dror Sharon
- Department of Ophthalmology, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Ronald Roepman
- Department of Human Genetics and Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands and
| | - Carlo Rivolta
- Department of Medical Genetics, University of Lausanne, Lausanne, Switzerland
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27
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Douthwright S, Sluder G. Link between DNA damage and centriole disengagement/reduplication in untransformed human cells. J Cell Physiol 2014; 229:1427-36. [PMID: 24532022 PMCID: PMC4122266 DOI: 10.1002/jcp.24579] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 02/12/2014] [Indexed: 12/21/2022]
Abstract
The radiation and radiomimetic drugs used to treat human tumors damage DNA in both cancer cells and normal proliferating cells. Centrosome amplification after DNA damage is well established for transformed cell types but is sparsely reported and not fully understood in untransformed cells. We characterize centriole behavior after DNA damage in synchronized untransformed human cells. One hour treatment of S phase cells with the radiomimetic drug, Doxorubicin, prolongs G2 by at least 72 h, though 14% of the cells eventually go through mitosis in that time. By 72 h after DNA damage we observe a 52% incidence of centriole disengagement plus a 10% incidence of extra centrioles. We find that either APC/C or Plk activities can disengage centrioles after DNA damage, though they normally work in concert. All disengaged centrioles are associated with γ-tubulin and maturation markers and thus, should in principle be capable of reduplicating and organizing spindle poles. The low incidence of reduplication of disengaged centrioles during G2 is due to the p53-dependent expression of p21 and the consequent loss of Cdk2 activity. We find that 26% of the cells going through mitosis after DNA damage contain disengaged or extra centrioles. This could produce genomic instability through transient or persistent spindle multipolarity. Thus, for cancer patients the use of DNA damaging therapies raises the chances of genomic instability and evolution of transformed characteristics in proliferating normal cell populations.
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Affiliation(s)
- Stephen Douthwright
- Department of Cell and Developmental Biology University of Massachusetts Medical School, Worcester, Massachusetts 01655
| | - Greenfield Sluder
- Department of Cell and Developmental Biology University of Massachusetts Medical School, Worcester, Massachusetts 01655
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28
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Unexpected genetic heterogeneity for primary ciliary dyskinesia in the Irish Traveller population. Eur J Hum Genet 2014; 23:210-7. [PMID: 24824133 DOI: 10.1038/ejhg.2014.79] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2013] [Revised: 03/22/2014] [Accepted: 04/04/2014] [Indexed: 02/07/2023] Open
Abstract
We present a study of five children from three unrelated Irish Traveller families presenting with primary ciliary dyskinesia (PCD). As previously characterized disorders in the Irish Traveller population are caused by common homozygous mutations, we hypothesised that all three PCD families shared the same recessive mutation. However, exome sequencing showed that there was no pathogenic homozygous mutation common to all families. This finding was supported by histology, which showed that each family has a different type of ciliary defect; transposition defect (family A), nude epithelium (family B) and absence of inner and outer dynein arms (family C). Therefore, each family was analysed independently using homozygosity mapping and exome sequencing. The affected siblings in family A share a novel 1 bp duplication in RSPH4A (NM_001161664.1:c.166dup; p.Arg56Profs*11), a radial-spoke head protein involved in ciliary movement. In family B, we identified three candidate genes (CCNO, KCNN3 and CDKN1C), with a 5-bp duplication in CCNO (NM_021147.3:c.258_262dup; p.Gln88Argfs*8) being the most likely cause of ciliary aplasia. This is the first study to implicate CCNO, a DNA repair gene reported to be involved in multiciliogenesis, in PCD. In family C, we identified a ∼3.5-kb deletion in DYX1C1, a neuronal migration gene previously associated with PCD. This is the first report of a disorder in the relatively small Irish Traveller population to be caused by >1 disease gene. Our study identified at least three different PCD genes in the Irish Traveller population, highlighting that one cannot always assume genetic homogeneity, even in small consanguineous populations.
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29
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El Shamieh S, Neuillé M, Terray A, Orhan E, Condroyer C, Démontant V, Michiels C, Antonio A, Boyard F, Lancelot ME, Letexier M, Saraiva JP, Léveillard T, Mohand-Saïd S, Goureau O, Sahel JA, Zeitz C, Audo I. Whole-exome sequencing identifies KIZ as a ciliary gene associated with autosomal-recessive rod-cone dystrophy. Am J Hum Genet 2014; 94:625-33. [PMID: 24680887 DOI: 10.1016/j.ajhg.2014.03.005] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Accepted: 03/11/2014] [Indexed: 12/22/2022] Open
Abstract
Rod-cone dystrophy (RCD), also known as retinitis pigmentosa, is a progressive inherited retinal disorder characterized by photoreceptor cell death and genetic heterogeneity. Mutations in many genes have been implicated in the pathophysiology of RCD, but several others remain to be identified. Herein, we applied whole-exome sequencing to a consanguineous family with one subject affected with RCD and identified a homozygous nonsense mutation, c.226C>T (p.Arg76(∗)), in KIZ, which encodes centrosomal protein kizuna. Subsequent Sanger sequencing of 340 unrelated individuals with sporadic and autosomal-recessive RCD identified two other subjects carrying pathogenic variants in KIZ: one with the same homozygous nonsense mutation (c.226C>T [p.Arg76(∗)]) and another with compound-heterozygous mutations c.119_122delAACT (p.Lys40Ilefs(∗)14) and c.52G>T (p.Glu18(∗)). Transcriptomic analysis in mice detected mRNA levels of the mouse ortholog (Plk1s1) in rod photoreceptors, as well as its decreased expression when photoreceptors degenerated in rd1 mice. The presence of the human KIZ transcript was confirmed by quantitative RT-PCR in the retina, the retinal pigment epithelium, fibroblasts, and whole-blood cells (highest expression was in the retina). RNA in situ hybridization demonstrated the presence of Plk1s1 mRNA in the outer nuclear layer of the mouse retina. Immunohistology revealed KIZ localization at the basal body of the cilia in human fibroblasts, thus shedding light on another ciliary protein implicated in autosomal-recessive RCD.
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Affiliation(s)
- Said El Shamieh
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Marion Neuillé
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Angélique Terray
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Elise Orhan
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Christel Condroyer
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Vanessa Démontant
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Christelle Michiels
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Aline Antonio
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Fiona Boyard
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Marie-Elise Lancelot
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Mélanie Letexier
- IntegraGen SA, Genopole Campus 1, Building G8, Evry 91030, France
| | | | - Thierry Léveillard
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - Saddek Mohand-Saïd
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France; Institut National de la Santé et de la Recherche Médicale and Direction de l'Hospitalisation et de l'Organisation des Soins Centre d'Investigation Clinique 1423, Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris 75012, France
| | - Olivier Goureau
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France
| | - José-Alain Sahel
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France; Institut National de la Santé et de la Recherche Médicale and Direction de l'Hospitalisation et de l'Organisation des Soins Centre d'Investigation Clinique 1423, Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris 75012, France; Fondation Ophtalmologique Adolphe de Rothschild, Paris 75019, France; Académie des Sciences, Institut de France, Paris 75006, France; University College London Institute of Ophthalmology, 11-43 Bath Street, London EC1V 9EL, UK
| | - Christina Zeitz
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France.
| | - Isabelle Audo
- Institut National de la Santé et de la Recherche Médicale U968, Paris 75012, France; Centre National de la Recherche Scientifique UMR_7210, Paris 75012, France; Institut de la Vision UMR_S 968, Université Pierre et Marie Curie (Paris 6), Sorbonne Universités, Paris 75012, France; Institut National de la Santé et de la Recherche Médicale and Direction de l'Hospitalisation et de l'Organisation des Soins Centre d'Investigation Clinique 1423, Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris 75012, France; University College London Institute of Ophthalmology, 11-43 Bath Street, London EC1V 9EL, UK.
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Dantas TJ, Daly OM, Conroy PC, Tomas M, Wang Y, Lalor P, Dockery P, Ferrando-May E, Morrison CG. Calcium-binding capacity of centrin2 is required for linear POC5 assembly but not for nucleotide excision repair. PLoS One 2013; 8:e68487. [PMID: 23844208 PMCID: PMC3699651 DOI: 10.1371/journal.pone.0068487] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2013] [Accepted: 05/29/2013] [Indexed: 12/25/2022] Open
Abstract
Centrosomes, the principal microtubule-organising centres in animal cells, contain centrins, small, conserved calcium-binding proteins unique to eukaryotes. Centrin2 binds to xeroderma pigmentosum group C protein (XPC), stabilising it, and its presence slightly increases nucleotide excision repair (NER) activity in vitro. In previous work, we deleted all three centrin isoforms present in chicken DT40 cells and observed delayed repair of UV-induced DNA lesions, but no centrosome abnormalities. Here, we explore how centrin2 controls NER. In the centrin null cells, we expressed centrin2 mutants that cannot bind calcium or that lack sites for phosphorylation by regulatory kinases. Expression of any of these mutants restored the UV sensitivity of centrin null cells to normal as effectively as expression of wild-type centrin. However, calcium-binding-deficient and T118A mutants showed greatly compromised localisation to centrosomes. XPC recruitment to laser-induced UV-like lesions was only slightly slower in centrin-deficient cells than in controls, and levels of XPC and its partner HRAD23B were unaffected by centrin deficiency. Interestingly, we found that overexpression of the centrin interactor POC5 leads to the assembly of linear, centrin-dependent structures that recruit other centrosomal proteins such as PCM-1 and NEDD1. Together, these observations suggest that assembly of centrins into complex structures requires calcium binding capacity, but that such assembly is not required for centrin activity in NER.
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Affiliation(s)
- Tiago J. Dantas
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Owen M. Daly
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Pauline C. Conroy
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Martin Tomas
- Bioimaging Center, University of Konstanz, Konstanz, Germany
- Department of Physics, Center for Applied Photonics, University of Konstanz, Konstanz, Germany
| | - Yifan Wang
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
| | - Pierce Lalor
- Anatomy, School of Medicine, National University of Ireland Galway, Galway, Ireland
| | - Peter Dockery
- Anatomy, School of Medicine, National University of Ireland Galway, Galway, Ireland
| | | | - Ciaran G. Morrison
- Centre for Chromosome Biology, School of Natural Sciences, National University of Ireland Galway, Galway, Ireland
- * E-mail:
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Sillibourne JE, Hurbain I, Grand-Perret T, Goud B, Tran P, Bornens M. Primary ciliogenesis requires the distal appendage component Cep123. Biol Open 2013; 2:535-45. [PMID: 23789104 PMCID: PMC3683156 DOI: 10.1242/bio.20134457] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2013] [Accepted: 03/14/2013] [Indexed: 12/14/2022] Open
Abstract
Primary cilium formation is initiated at the distal end of the mother centriole in a highly co-ordinated manner. This requires the capping of the distal end of the mother centriole with a ciliary vesicle and the anchoring of the basal body (mother centriole) to the cell cortex, both of which are mediated by the distal appendages. Here, we show that the distal appendage protein Cep123 (Cep89/CCDC123) is required for the assembly, but not the maintenance, of a primary cilium. In the absence of Cep123 ciliary vesicle formation fails, suggesting that it functions in the early stages of primary ciliogenesis. Consistent with such a role, Cep123 interacts with the centriolar satellite proteins PCM-1, Cep290 and OFD1, all of which play a role in primary ciliogenesis. These interactions are mediated by a domain in the C-terminus of Cep123 (400-783) that overlaps the distal appendage-targeting domain (500-600). Together, the data implicate Cep123 as a new player in the primary ciliogenesis pathway and expand upon the role of the distal appendages in this process.
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Affiliation(s)
- James E. Sillibourne
- Institut Curie, Centre de Recherche/UMR144 du Centre Nationale de la Recherche Scientifique, 26 rue d'Ulm, F-75248 Paris Cedex 05, France
| | - Ilse Hurbain
- Cell and Tissue Imaging Facility-IBiSA, CNRS UMR 144, Paris F-75248, France
| | - Thierry Grand-Perret
- Oncology Discovery, Janssen Research and Development, Turnhoutseweg 30, B-2340 Beerse, Belgium
| | - Bruno Goud
- Institut Curie, Centre de Recherche/UMR144 du Centre Nationale de la Recherche Scientifique, 26 rue d'Ulm, F-75248 Paris Cedex 05, France
| | - Phong Tran
- Institut Curie, Centre de Recherche/UMR144 du Centre Nationale de la Recherche Scientifique, 26 rue d'Ulm, F-75248 Paris Cedex 05, France
| | - Michel Bornens
- Institut Curie, Centre de Recherche/UMR144 du Centre Nationale de la Recherche Scientifique, 26 rue d'Ulm, F-75248 Paris Cedex 05, France
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Basten SG, Giles RH. Functional aspects of primary cilia in signaling, cell cycle and tumorigenesis. Cilia 2013; 2:6. [PMID: 23628112 PMCID: PMC3662159 DOI: 10.1186/2046-2530-2-6] [Citation(s) in RCA: 147] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 03/25/2013] [Indexed: 01/09/2023] Open
Abstract
Dysfunctional cilia underlie a broad range of cellular and tissue phenotypes and can eventually result in the development of ciliopathies: pathologically diverse diseases that range from clinically mild to highly complex and severe multi-organ failure syndromes incompatible with neonatal life. Given that virtually all cells of the human body have the capacity to generate cilia, it is likely that clinical manifestations attributed to ciliary dysfunction will increase in the years to come. Disputed but nevertheless enigmatic is the notion that at least a subset of tumor phenotypes fit within the ciliopathy disease spectrum and that cilia loss may be required for tumor progression. Contending for the centrosome renders ciliation and cell division mutually exclusive; a regulated tipping of balance promotes either process. The mechanisms involved, however, are complex. If the hypothesis that tumorigenesis results from dysfunctional cilia is true, then why do the classic ciliopathies only show limited hyperplasia at best? Although disassembly of the cilium is a prerequisite for cell proliferation, it does not intrinsically drive tumorigenesis per se. Alternatively, we will explore the emerging evidence suggesting that some tumors depend on ciliary signaling. After reviewing the structure, genesis and signaling of cilia, the various ciliopathy syndromes and their genetics, we discuss the current debate of tumorigenesis as a ciliopathy spectrum defect, and describe recent advances in this fascinating field.
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Affiliation(s)
- Sander G Basten
- Department of Medical Oncology, UMC Utrecht, Universiteitsweg 100, Utrecht, 3584 CG, The Netherlands
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Heidelberglaan 100, Utrecht, F03.223, 3584 CX, The Netherlands
| | - Rachel H Giles
- Department of Nephrology and Hypertension, University Medical Center Utrecht, Heidelberglaan 100, Utrecht, F03.223, 3584 CX, The Netherlands
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