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Nardin C, Peres C, Putti S, Orsini T, Colussi C, Mazzarda F, Raspa M, Scavizzi F, Salvatore AM, Chiani F, Tettey-Matey A, Kuang Y, Yang G, Retamal MA, Mammano F. Connexin Hemichannel Activation by S-Nitrosoglutathione Synergizes Strongly with Photodynamic Therapy Potentiating Anti-Tumor Bystander Killing. Cancers (Basel) 2021; 13:cancers13205062. [PMID: 34680212 PMCID: PMC8533914 DOI: 10.3390/cancers13205062] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 10/02/2021] [Accepted: 10/06/2021] [Indexed: 12/22/2022] Open
Abstract
Simple Summary Bystander effects depend on direct cell-cell communication and/or paracrine signaling mediated by the release of soluble factors into the extracellular environment and may greatly influence therapy outcome. Although the limited data available suggest a role for intercellular gap junction channels, far less is known about the role of connexin hemichannels. Here, we investigated bystander effects induced by photodynamic therapy in syngeneic murine melanoma models in vivo. We determined that (i) photoactivation of a photosensitizer triggered calcium-dependent cell death pathways in both irradiated and bystander tumor cells; (ii) hemichannel activity and adenosine triphosphate release were key factors for the induction of bystander cell death; and (iii) bystander cell killing and antitumor response elicited by photodynamic therapy were greatly enhanced by combination treatment with S-nitrosoglutathione, which promoted hemichannel opening in these experimental conditions. Therefore, these findings in a preclinical model have important translational potential. Abstract In this study, we used B16-F10 cells grown in the dorsal skinfold chamber (DSC) preparation that allowed us to gain optical access to the processes triggered by photodynamic therapy (PDT). Partial irradiation of a photosensitized melanoma triggered cell death in non-irradiated tumor cells. Multiphoton intravital microscopy with genetically encoded fluorescence indicators revealed that bystander cell death was mediated by paracrine signaling due to adenosine triphosphate (ATP) release from connexin (Cx) hemichannels (HCs). Intercellular calcium (Ca2+) waves propagated from irradiated to bystander cells promoting intracellular Ca2+ transfer from the endoplasmic reticulum (ER) to mitochondria and rapid activation of apoptotic pathways. Combination treatment with S-nitrosoglutathione (GSNO), an endogenous nitric oxide (NO) donor that biases HCs towards the open state, greatly potentiated anti-tumor bystander killing via enhanced Ca2+ signaling, leading to a significant reduction of post-irradiation tumor mass. Our results demonstrate that HCs can be exploited to dramatically increase cytotoxic bystander effects and reveal a previously unappreciated role for HCs in tumor eradication promoted by PDT.
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Affiliation(s)
- Chiara Nardin
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
| | - Chiara Peres
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
| | - Sabrina Putti
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
| | - Tiziana Orsini
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
| | - Claudia Colussi
- Institute for Systems Analysis and Computer Science “A. Ruberti” (IASI)-CNR, 00168 Rome, Italy;
- Fondazione Policlinico Universitario Agostino Gemelli IRCCS, Catholic University of the Sacred Heart, 00168 Rome, Italy
| | - Flavia Mazzarda
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
- Frank Reidy Research Center for Bioelectrics, Old Dominion University, Norfolk, VA 23508, USA
| | - Marcello Raspa
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
| | - Ferdinando Scavizzi
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
| | - Anna Maria Salvatore
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
| | - Francesco Chiani
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
| | - Abraham Tettey-Matey
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
| | - Yuanyuan Kuang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China; (Y.K.); (G.Y.)
| | - Guang Yang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China; (Y.K.); (G.Y.)
| | - Mauricio A. Retamal
- Universidad del Desarrollo, Centro de Fisiología Celular e Integrativa, Facultad de Medicina Clínica Alemana, Santiago 7780272, Chile;
| | - Fabio Mammano
- Institute of Biochemistry and Cell Biology (IBBC)-CNR, 00015 Rome, Italy; (C.N.); (C.P.); (S.P.); (T.O.); (F.M.); (M.R.); (F.S.); (A.M.S.); (F.C.); (A.T.-M.)
- Department of Physics and Astronomy “G. Galilei”, University of Padova, 35131 Padova, Italy
- Correspondence:
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Birling MC, Yoshiki A, Adams DJ, Ayabe S, Beaudet AL, Bottomley J, Bradley A, Brown SDM, Bürger A, Bushell W, Chiani F, Chin HJG, Christou S, Codner GF, DeMayo FJ, Dickinson ME, Doe B, Donahue LR, Fray MD, Gambadoro A, Gao X, Gertsenstein M, Gomez-Segura A, Goodwin LO, Heaney JD, Hérault Y, de Angelis MH, Jiang ST, Justice MJ, Kasparek P, King RE, Kühn R, Lee H, Lee YJ, Liu Z, Lloyd KCK, Lorenzo I, Mallon AM, McKerlie C, Meehan TF, Fuentes VM, Newman S, Nutter LMJ, Oh GT, Pavlovic G, Ramirez-Solis R, Rosen B, Ryder EJ, Santos LA, Schick J, Seavitt JR, Sedlacek R, Seisenberger C, Seong JK, Skarnes WC, Sorg T, Steel KP, Tamura M, Tocchini-Valentini GP, Wang CKL, Wardle-Jones H, Wattenhofer-Donzé M, Wells S, Wiles MV, Willis BJ, Wood JA, Wurst W, Xu Y, Teboul L, Murray SA. A resource of targeted mutant mouse lines for 5,061 genes. Nat Genet 2021; 53:416-419. [PMID: 33833456 PMCID: PMC8397259 DOI: 10.1038/s41588-021-00825-y] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | | | | | - Shinya Ayabe
- RIKEN BioResource Research Center, Tsukuba, Japan
| | - Arthur L Beaudet
- Baylor College of Medicine, Houston, TX, USA
- Luna Genetics, Houston, TX, USA
| | | | - Allan Bradley
- Wellcome Sanger Institute, Hinxton, UK
- Cambridge Institute of Therapeutic Immunology and Infectious Disease (CITIID), Jeffrey Cheah Biomedical Centre, University of Cambridge, Cambridge, UK
| | | | - Antje Bürger
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Wendy Bushell
- Wellcome Sanger Institute, Hinxton, UK
- IONTAS, Cambridge, UK
| | - Francesco Chiani
- Monterotondo Mouse Clinic, Italian National Research Council (CNR), Institute of Cell Biology and Neurobiology, Monterotondo Scalo, Italy
| | - Hsian-Jean Genie Chin
- National Laboratory Animal Center, National Applied Research Laboratories (NARLabs), Taipei, Taiwan
| | | | | | - Francesco J DeMayo
- Baylor College of Medicine, Houston, TX, USA
- National Institute for Environmental Health Science Research, Durham, NC, USA
| | | | | | | | | | - Alessia Gambadoro
- Monterotondo Mouse Clinic, Italian National Research Council (CNR), Institute of Cell Biology and Neurobiology, Monterotondo Scalo, Italy
| | - Xiang Gao
- SKL of Pharmaceutical Biotechnology and Model Animal Research Center, Collaborative Innovation Center for Genetics and Development, Nanjing Biomedical Research Institute, Nanjing University, Nanjing, China
| | | | - Alba Gomez-Segura
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Hinxton, UK
| | | | | | - Yann Hérault
- Université de Strasbourg, CNRS, INSERM, PHENOMIN-ICS, IGBMC, Illkirch, France
| | - Martin Hrabe de Angelis
- German Mouse Clinic, Institute of Experimental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Experimental Genetics, Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
- German Center for Diabetes Research, Neuherberg, Germany
| | - Si-Tse Jiang
- National Laboratory Animal Center, National Applied Research Laboratories (NARLabs), Taipei, Taiwan
| | - Monica J Justice
- Baylor College of Medicine, Houston, TX, USA
- Centre for Phenogenomics, Toronto, Ontario, Canada
- Hospital for Sick Children, Toronto, Ontario, Canada
| | - Petr Kasparek
- Czech Centre for Phenogenomics, Institute of Molecular Genetics of the Czech Academy of Sciences, Vestec, Czech Republic
| | | | - Ralf Kühn
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Max Delbrueck Center for Molecular Medicine, Berlin, Germany
- Berlin Institute of Health, Berlin, Germany
| | - Ho Lee
- Korea Mouse Phenotyping Center (KMPC) and Graduate School of Cancer Science and Policy, National Cancer Center, Gyeonggi, Republic of Korea
| | - Young Jae Lee
- Korea Mouse Phenotyping Center (KMPC) and Lee Gil Ya Cancer and Diabetes Institute, Gachon University, Incheon, Republic of Korea
| | - Zhiwei Liu
- CAM-SU Genomic Resource Center, Soochow University, Suzhou, China
| | - K C Kent Lloyd
- Mouse Biology Program, University of California, Davis, Davis, CA, USA
| | | | | | - Colin McKerlie
- Centre for Phenogenomics, Toronto, Ontario, Canada
- Hospital for Sick Children, Toronto, Ontario, Canada
| | - Terrence F Meehan
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Hinxton, UK
- Kymab Group, Cambridge, UK
| | - Violeta Munoz Fuentes
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Hinxton, UK
| | - Stuart Newman
- Wellcome Sanger Institute, Hinxton, UK
- PetMedix, Cambridge, UK
| | - Lauryl M J Nutter
- Centre for Phenogenomics, Toronto, Ontario, Canada
- Hospital for Sick Children, Toronto, Ontario, Canada
| | - Goo Taeg Oh
- Immune and Vascular Cell Network Research Center, National Creative Initiatives and Department of Life Sciences, Ewha Womans Univesity, Seoul, Republic of Korea
| | - Guillaume Pavlovic
- Université de Strasbourg, CNRS, INSERM, PHENOMIN-ICS, IGBMC, Illkirch, France
| | | | - Barry Rosen
- Wellcome Sanger Institute, Hinxton, UK
- AstraZeneca, Discovery Sciences, Cambridge, UK
| | - Edward J Ryder
- Wellcome Sanger Institute, Hinxton, UK
- LGC, Sport and Specialised Analytical Services, Fordham, UK
| | - Luis A Santos
- MRC Harwell Institute, Mammalian Genetics Unit, Didcot, UK
| | - Joel Schick
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Genetics and Cellular Engineering Group, Institute of Molecular Toxicology and Pharmacology, Helmholtz Zentrum Munich, Neuherberg, Germany
| | | | - Radislav Sedlacek
- Czech Centre for Phenogenomics, Institute of Molecular Genetics of the Czech Academy of Sciences, Vestec, Czech Republic
| | - Claudia Seisenberger
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
| | - Je Kyung Seong
- Korea Mouse Phenotyping Center (KMPC) and BK21 Program for Veterinary Science, Research Institute for Veterinary Science, College of Veterinary Medicine, Seoul National University, Seoul, Republic of Korea
| | - William C Skarnes
- Wellcome Sanger Institute, Hinxton, UK
- The Jackson Laboratory for Genomic Medicine, Farmington, CT, USA
| | - Tania Sorg
- Université de Strasbourg, CNRS, INSERM, PHENOMIN-ICS, IGBMC, Illkirch, France
| | - Karen P Steel
- Wellcome Sanger Institute, Hinxton, UK
- Wolfson Centre for Age-Related Diseases, King's College London, London, UK
| | | | - Glauco P Tocchini-Valentini
- Monterotondo Mouse Clinic, Italian National Research Council (CNR), Institute of Cell Biology and Neurobiology, Monterotondo Scalo, Italy
| | - Chi-Kuang Leo Wang
- National Laboratory Animal Center, National Applied Research Laboratories (NARLabs), Taipei, Taiwan
| | | | | | - Sara Wells
- MRC Harwell Institute, Mary Lyon Centre, Didcot, UK
| | | | - Brandon J Willis
- Mouse Biology Program, University of California, Davis, Davis, CA, USA
| | - Joshua A Wood
- Mouse Biology Program, University of California, Davis, Davis, CA, USA
| | - Wolfgang Wurst
- Institute of Developmental Genetics, Helmholtz Zentrum München, German Research Center for Environmental Health, Neuherberg, Germany
- Developmental Genetics, Center of Life and Food Sciences Weihenstephan, Technische Universität München, Freising-Weihenstephan, Germany
- German Center for Neurodegenerative Diseases, Munich, Germany
| | - Ying Xu
- CAM-SU Genomic Resource Center, Soochow University, Suzhou, China
| | - Lydia Teboul
- MRC Harwell Institute, Mary Lyon Centre, Didcot, UK.
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Mazzarda F, D'Elia A, Massari R, De Ninno A, Bertani FR, Businaro L, Ziraldo G, Zorzi V, Nardin C, Peres C, Chiani F, Tettey-Matey A, Raspa M, Scavizzi F, Soluri A, Salvatore AM, Yang J, Mammano F. Organ-on-chip model shows that ATP release through connexin hemichannels drives spontaneous Ca 2+ signaling in non-sensory cells of the greater epithelial ridge in the developing cochlea. Lab Chip 2020; 20:3011-3023. [PMID: 32700707 DOI: 10.1039/d0lc00427h] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Prior work supports the hypothesis that ATP release through connexin hemichannels drives spontaneous Ca2+ signaling in non-sensory cells of the greater epithelial ridge (GER) in the developing cochlea; however, direct proof is lacking. To address this issue, we plated cochlear organotypic cultures (COCs) and whole cell-based biosensors with nM ATP sensitivity (ATP-WCBs) at the bottom and top of an ad hoc designed transparent microfluidic chamber, respectively. By performing dual multiphoton Ca2+ imaging, we monitored the propagation of intercellular Ca2+ waves in the GER of COCs and ATP-dependent Ca2+ responses in overlying ATP-WCBs. Ca2+ signals in both COCs and ATP-WCBs were inhibited by supplementing the extracellular medium with ATP diphosphohydrolase (apyrase). Spontaneous Ca2+ signals were strongly depressed in the presence of Gjb6-/- COCs, in which connexin 30 (Cx30) is absent and connexin 26 (Cx26) is strongly downregulated. In contrast, spontaneous Ca2+ signals were not affected by replacement of Panx1-/- with Panx1+/+ COCs in the microfluidic chamber. Similar results were obtained by estimating ATP release from COCs using a classical luciferin-luciferase bioluminescence assay. Therefore, connexin hemichannels and not pannexin 1 channels mediate the release of ATP that is responsible for Ca2+ wave propagation in the developing mouse cochlea. The technological advances presented here have the potential to shed light on a plethora of unrelated open issues that involve paracrine signaling in physiology and pathology and cannot be addressed with standard methods.
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Affiliation(s)
- Flavia Mazzarda
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy. and Department of Science, Università degli Studi di Roma3, Rome, Italy
| | - Annunziata D'Elia
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy. and Department of Science, Università degli Studi di Roma3, Rome, Italy
| | - Roberto Massari
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy.
| | - Adele De Ninno
- CNR Institute for Photonics and Nanotechnology, Rome, Italy.
| | | | - Luca Businaro
- CNR Institute for Photonics and Nanotechnology, Rome, Italy.
| | - Gaia Ziraldo
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy. and Institute of Otorhinolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Veronica Zorzi
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy. and Institute of Otorhinolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Chiara Nardin
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy.
| | - Chiara Peres
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy.
| | - Francesco Chiani
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy.
| | | | - Marcello Raspa
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy.
| | | | - Alessandro Soluri
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy.
| | | | - Jun Yang
- Department of Otorhinolaryngology Head and Neck Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China. and Shanghai Key Laboratory of Translational Medicine on Ear and Nose diseases, Shanghai, China
| | - Fabio Mammano
- CNR Institute of Biochemistry and Cell Biology, Monterotondo, Rome, Italy. and Department of Physics and Astronomy "G. Galilei", University of Padova, Padua, Italy.
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Kuang Y, Zorzi V, Buratto D, Ziraldo G, Mazzarda F, Peres C, Nardin C, Salvatore AM, Chiani F, Scavizzi F, Raspa M, Qiang M, Chu Y, Shi X, Li Y, Liu L, Shi Y, Zonta F, Yang G, Lerner RA, Mammano F. A potent antagonist antibody targeting connexin hemichannels alleviates Clouston syndrome symptoms in mutant mice. EBioMedicine 2020; 57:102825. [PMID: 32553574 PMCID: PMC7378960 DOI: 10.1016/j.ebiom.2020.102825] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2020] [Revised: 05/22/2020] [Accepted: 05/22/2020] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Numerous currently incurable human diseases have been causally linked to mutations in connexin (Cx) genes. In several instances, pathological mutations generate abnormally active Cx hemichannels, referred to also as "leaky" hemichannels. The goal of this study was to assay the in vivo efficacy of a potent antagonist antibody targeting Cx hemichannels. METHODS We employed the antibody to treat Cx30A88V/A88V adult mutant mice, the only available animal model of Clouston syndrome, a rare orphan disease caused by Cx30 p.A88V leaky hemichannels. To gain mechanistic insight into antibody action, we also performed patch clamp recordings, Ca2+ imaging and ATP release assay in vitro. FINDINGS Two weeks of antibody treatment sufficed to repress cell hyperproliferation in skin and reduce hypertrophic sebaceous glands (SGs) to wild type (wt) levels. These effects were obtained whether mutant mice were treated topically, by application of an antibody cream formulation, or systemically, by intraperitoneal antibody injection. Experiments with mouse primary keratinocytes and HaCaT cells revealed the antibody blocked Ca2+ influx and diminished ATP release through leaky Cx30 p.A88V hemichannels. INTERPRETATION Our results show anti-Cx antibody treatment was effective in vivo and sufficient to counteract the effects of pathological connexin expression in Cx30A88V/A88V mice. In vitro experiments suggest antibodies gained control over leaky hemichannels and contributed to restoring epidermal homeostasis. Therefore, regulating cell physiology by antibodies targeting the extracellular domain of Cxs may enforce an entirely new therapeutic strategy. These findings support the further development of antibodies as drugs to address unmet medical needs for Cx-related diseases. FUND: Fondazione Telethon, GGP19148; University of Padova, SID/BIRD187130; Consiglio Nazionale delle Ricerche, DSB.AD008.370.003\TERABIO-IBCN; National Science Foundation of China, 31770776; Science and Technology Commission of Shanghai Municipality, 16DZ1910200.
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Affiliation(s)
- Yuanyuan Kuang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China; School of Life Science and Technology, ShanghaiTech University, 201210 Shanghai, China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 200031 Shanghai, China; University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Veronica Zorzi
- CNR Institute of Biochemistry and Cell Biology, 00015 Monterotondo, Italy; Institute of Otorhinolaryngology, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Damiano Buratto
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China
| | - Gaia Ziraldo
- CNR Institute of Biochemistry and Cell Biology, 00015 Monterotondo, Italy; Institute of Otorhinolaryngology, Università Cattolica del Sacro Cuore, 00168 Rome, Italy
| | - Flavia Mazzarda
- CNR Institute of Biochemistry and Cell Biology, 00015 Monterotondo, Italy; Department of Science, Roma3 University, 00146 Rome, Italy
| | - Chiara Peres
- CNR Institute of Biochemistry and Cell Biology, 00015 Monterotondo, Italy; Department of Physics and Astronomy "G. Galilei", University of Padova, 35131 Padova, Italy
| | - Chiara Nardin
- CNR Institute of Biochemistry and Cell Biology, 00015 Monterotondo, Italy; Department of Physics and Astronomy "G. Galilei", University of Padova, 35131 Padova, Italy
| | | | - Francesco Chiani
- CNR Institute of Biochemistry and Cell Biology, 00015 Monterotondo, Italy
| | | | - Marcello Raspa
- CNR Institute of Biochemistry and Cell Biology, 00015 Monterotondo, Italy
| | - Min Qiang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China
| | - Youjun Chu
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China
| | - Xiaojie Shi
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China
| | - Yu Li
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China; School of Life Science and Technology, ShanghaiTech University, 201210 Shanghai, China; Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 200031 Shanghai, China; University of Chinese Academy of Sciences, 100049 Beijing, China
| | - Lili Liu
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China
| | - Yaru Shi
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China
| | - Francesco Zonta
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China
| | - Guang Yang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China.
| | - Richard A Lerner
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China; Department of Chemistry, Scripps Research Institute, La Jolla, CA 92037, U.S.A..
| | - Fabio Mammano
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai 201210, China; CNR Institute of Biochemistry and Cell Biology, 00015 Monterotondo, Italy; Department of Physics and Astronomy "G. Galilei", University of Padova, 35131 Padova, Italy.
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Chiani F, Orsini T, Gambadoro A, Pasquini M, Putti S, Cirilli M, Ermakova O, Tocchini-Valentini GP. Functional loss of Ccdc1 51 leads to hydrocephalus in a mouse model of primary ciliary dyskinesia. Dis Model Mech 2019; 12:dmm.038489. [PMID: 31383820 PMCID: PMC6737950 DOI: 10.1242/dmm.038489] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 07/03/2019] [Indexed: 01/10/2023] Open
Abstract
Primary ciliary dyskinesia (PCD) is a genetically heterogeneous disorder affecting normal structure and function of motile cilia, phenotypically manifested as chronic respiratory infections, laterality defects and infertility. Autosomal recessive mutations in genes encoding for different components of the ciliary axoneme have been associated with PCD in humans and in model organisms. The CCDC151 gene encodes for a coiled-coil axonemal protein that ensures correct attachment of outer dynein arm (ODA) complexes to microtubules. A correct arrangement of dynein arm complexes is required to provide the proper mechanical force necessary for cilia beat. Loss-of-function mutations in CCDC151 in humans leads to PCD disease with respiratory distress and defective left-right body asymmetry. In mice with the Ccdc151Snbl loss-of-function mutation (Snowball mutant), left-right body asymmetry with heart defects have been observed. Here, we demonstrate that loss of Ccdc151 gene function via targeted gene deletion in mice leads to perinatal lethality and congenital hydrocephalus. Microcomputed tomography (microCT) X-ray imaging of Ccdc151-β-galactosidase reporter expression in whole-mount brain and histological analysis show that Ccdc151 is expressed in ependymal cells lining the ventricular brain system, further confirming the role of Ccdc151 dysfunction in hydrocephalus development. Analyzing the features of hydrocephalus in the Ccdc151-knockout animals by microCT volumetric imaging, we observe continuity of the aqueduct of Sylvius, indicating the communicating nature of hydrocephalus in the Ccdc151-knockout animals. Congenital defects in left-right asymmetry and male infertility have been also observed in Ccdc151-null animals. Ccdc151 gene deletion in adult animals results in abnormal sperm counts and defective sperm motility.This article has an associated First Person interview with the joint first authors of the paper.
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Affiliation(s)
- Francesco Chiani
- European Mouse Mutant Archive (EMMA), INFRAFRONTIER, Monterotondo Mouse Clinic, Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy.,Institute of Biochemistry and Cell Biology (IBBC), Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy
| | - Tiziana Orsini
- European Mouse Mutant Archive (EMMA), INFRAFRONTIER, Monterotondo Mouse Clinic, Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy.,Institute of Biochemistry and Cell Biology (IBBC), Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy
| | - Alessia Gambadoro
- European Mouse Mutant Archive (EMMA), INFRAFRONTIER, Monterotondo Mouse Clinic, Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy.,Institute of Biochemistry and Cell Biology (IBBC), Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy
| | - Miriam Pasquini
- European Mouse Mutant Archive (EMMA), INFRAFRONTIER, Monterotondo Mouse Clinic, Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy.,Institute of Biochemistry and Cell Biology (IBBC), Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy
| | - Sabrina Putti
- European Mouse Mutant Archive (EMMA), INFRAFRONTIER, Monterotondo Mouse Clinic, Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy.,Institute of Biochemistry and Cell Biology (IBBC), Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy
| | - Maurizio Cirilli
- Institute of Biochemistry and Cell Biology (IBBC), Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy
| | - Olga Ermakova
- European Mouse Mutant Archive (EMMA), INFRAFRONTIER, Monterotondo Mouse Clinic, Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy .,Institute of Biochemistry and Cell Biology (IBBC), Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy
| | - Glauco P Tocchini-Valentini
- European Mouse Mutant Archive (EMMA), INFRAFRONTIER, Monterotondo Mouse Clinic, Department of Biomedical Sciences (DSB), Italian National Research Council (CNR), Adriano Buzzati-Traverso Campus, via Ramarini, 32, 00015, Monterotondo, Rome, Italy
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6
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Ziraldo G, Buratto D, Kuang Y, Xu L, Carrer A, Nardin C, Chiani F, Salvatore AM, Paludetti G, Lerner RA, Yang G, Zonta F, Mammano F. A Human-Derived Monoclonal Antibody Targeting Extracellular Connexin Domain Selectively Modulates Hemichannel Function. Front Physiol 2019; 10:392. [PMID: 31263420 PMCID: PMC6584803 DOI: 10.3389/fphys.2019.00392] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Accepted: 03/21/2019] [Indexed: 11/30/2022] Open
Abstract
Connexin hemichannels, which are plasma membrane hexameric channels (connexons) composed of connexin protein protomers, have been implicated in a host of physiological processes and pathological conditions. A number of single point pathological mutations impart a “leaky” character to the affected hemichannels, i.e., make them more active or hyperactive, suggesting that normal physiological condition could be recovered using selective hemichannel inhibitors. Recently, a human-derived monoclonal antibody named abEC1.1 has been shown to inhibit both wild type and hyperactive hemichannels composed of human (h) connexin 26 (hCx26) subunits. The aims of this work were (1) to characterize further the ability of abEC1.1 to selectively modulate connexin hemichannel function and (2) to assess its in vitro stability in view of future translational applications. In silico analysis of abEC1.1 interaction with the hCx26 hemichannel identified critically important extracellular domain amino acids that are conserved in connexin 30 (hCx30) and connexin 32 (hCx32). Patch clamp experiments performed in HeLa DH cells confirmed the inhibition efficiency of abEC1.1 was comparable for hCx26, hCx30 and hCx32 hemichannels. Of note, even a single amino acid difference in the putative binding region reduced drastically the inhibitory effects of the antibody on all the other tested hemichannels, namely hCx30.2/31.3, hCx30.3, hCx31, hCx31.1, hCx37, hCx43 and hCx45. Plasma membrane channels composed of pannexin 1 were not affected by abEC1.1. Finally, size exclusion chromatography assays showed the antibody does not aggregate appreciably in vitro. Altogether, these results indicate abEC1.1 is a promising tool for further translational studies.
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Affiliation(s)
- Gaia Ziraldo
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Institute of Otolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy
| | - Damiano Buratto
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
| | - Yuanyuan Kuang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
| | - Liang Xu
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
| | - Andrea Carrer
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Department of Physics and Astronomy "G. Galilei", University of Padova, Padua, Italy
| | - Chiara Nardin
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Department of Physics and Astronomy "G. Galilei", University of Padova, Padua, Italy
| | - Francesco Chiani
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | | | - Gaetano Paludetti
- Institute of Otolaryngology, Università Cattolica del Sacro Cuore, Rome, Italy.,Fondazione Policlinico Universitario A. Gemelli IRCCS, Rome, Italy
| | - Richard A Lerner
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
| | - Guang Yang
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
| | - Francesco Zonta
- Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
| | - Fabio Mammano
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China.,Department of Physics and Astronomy "G. Galilei", University of Padova, Padua, Italy
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7
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Zorzi V, Paciello F, Ziraldo G, Peres C, Mazzarda F, Nardin C, Pasquini M, Chiani F, Raspa M, Scavizzi F, Carrer A, Crispino G, Ciubotaru CD, Monyer H, Fetoni AR, M Salvatore A, Mammano F. Mouse Panx1 Is Dispensable for Hearing Acquisition and Auditory Function. Front Mol Neurosci 2017; 10:379. [PMID: 29234270 PMCID: PMC5712377 DOI: 10.3389/fnmol.2017.00379] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 10/30/2017] [Indexed: 11/13/2022] Open
Abstract
Panx1 forms plasma membrane channels in brain and several other organs, including the inner ear. Biophysical properties, activation mechanisms and modulators of Panx1 channels have been characterized in detail, however the impact of Panx1 on auditory function is unclear due to conflicts in published results. To address this issue, hearing performance and cochlear function of the Panx1−/− mouse strain, the first with a reported global ablation of Panx1, were scrutinized. Male and female homozygous (Panx1−/−), hemizygous (Panx1+/−) and their wild type (WT) siblings (Panx1+/+) were used for this study. Successful ablation of Panx1 was confirmed by RT-PCR and Western immunoblotting in the cochlea and brain of Panx1−/− mice. Furthermore, a previously validated Panx1-selective antibody revealed strong immunoreactivity in WT but not in Panx1−/− cochleae. Hearing sensitivity, outer hair cell-based “cochlear amplifier” and cochlear nerve function, analyzed by auditory brainstem response (ABR) and distortion product otoacoustic emission (DPOAE) recordings, were normal in Panx1+/− and Panx1−/− mice. In addition, we determined that global deletion of Panx1 impacts neither on connexin expression, nor on gap-junction coupling in the developing organ of Corti. Finally, spontaneous intercellular Ca2+ signal (ICS) activity in organotypic cochlear cultures, which is key to postnatal development of the organ of Corti and essential for hearing acquisition, was not affected by Panx1 ablation. Therefore, our results provide strong evidence that, in mice, Panx1 is dispensable for hearing acquisition and auditory function.
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Affiliation(s)
- Veronica Zorzi
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,School of Medicine, Institute of Otolaryngology, Catholic University, Rome, Italy
| | - Fabiola Paciello
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | - Gaia Ziraldo
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,School of Medicine, Institute of Otolaryngology, Catholic University, Rome, Italy
| | - Chiara Peres
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | - Flavia Mazzarda
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Department of Science, Roma Tre University, Rome, Italy
| | - Chiara Nardin
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Department of Science, Roma Tre University, Rome, Italy
| | - Miriam Pasquini
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Department of Biology and Biotechnology Charles Darwin, Sapienza University of Rome, Rome, Italy
| | - Francesco Chiani
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | - Marcello Raspa
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | | | - Andrea Carrer
- Department of Physics and Astronomy G. Galilei, University of Padua, Padua, Italy
| | - Giulia Crispino
- Department of Physics and Astronomy G. Galilei, University of Padua, Padua, Italy
| | | | - Hannah Monyer
- Department of Clinical Neurobiology, Deutches Krebforschungzentrum, University of Heidelberg, Heidelberg, Germany
| | - Anna R Fetoni
- School of Medicine, Institute of Otolaryngology, Catholic University, Rome, Italy
| | - Anna M Salvatore
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy
| | - Fabio Mammano
- CNR Institute of Cell Biology and Neurobiology, Monterotondo, Italy.,Department of Physics and Astronomy G. Galilei, University of Padua, Padua, Italy.,Shanghai Institute for Advanced Immunochemical Studies, ShanghaiTech University, Shanghai, China
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8
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Dickinson ME, Flenniken AM, Ji X, Teboul L, Wong MD, White JK, Meehan TF, Weninger WJ, Westerberg H, Adissu H, Baker CN, Bower L, Brown JM, Caddle LB, Chiani F, Clary D, Cleak J, Daly MJ, Denegre JM, Doe B, Dolan ME, Edie Helmut Fuchs SM, Gailus-Durner V, Galli A, Gambadoro A, Gallegos J, Guo S, Horner NR, Hsu CW, Johnson SJ, Kalaga S, Keith LC, Lanoue L, Lawson TN, Lek M, Mark M, Marschall S, Mason J, McElwee ML, Nutter SNLMJ, Peterson KA, Ramirez-Solis R, Rowland DJ, Ryder E, Samocha KE, Seavitt JR, Selloum M, Szoke-Kovacs Z, Tamura M, Trainor AG, Tudose I, Wakana S, Warren J, Wendling O, West DB, Wong L, Yoshiki A, Wurst W, MacArthur DG, Tocchini-Valentini GP, Gao X, Flicek P, Bradley A, Skarnes WC, Justice MJ, Parkinson HE, Moore M, Wells S, Braun RE, Svenson KL, de Angelis MH, Herault Y, Mohun T, Mallon AM, Henkelman RM, Brown SDM, Adams DJ, Lloyd KCK, McKerlie C, Beaudet AL, Murray MBSA. Corrigendum: High-throughput discovery of novel developmental phenotypes. Nature 2017; 551:398. [PMID: 29144450 DOI: 10.1038/nature24643] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
This corrects the article DOI: 10.1038/nature19356.
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9
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Kaloff C, Anastassiadis K, Ayadi A, Baldock R, Beig J, Birling MC, Bradley A, Brown S, Bürger A, Bushell W, Chiani F, Collins F, Doe B, Eppig J, Finnell R, Fletcher C, Flicek P, Fray M, Friedel R, Gambadoro A, Gates H, Hansen J, Herault Y, Hicks G, Hörlein A, Hrabé de Angelis M, Iyer V, de Jong P, Koscielny G, Kühn R, Liu P, Lloyd K, Lopez R, Marschall S, Martínez S, McKerlie C, Meehan T, von Melchner H, Moore M, Murray S, Nagy A, Nutter L, Pavlovic G, Pombero A, Prosser H, Ramirez-Solis R, Ringwald M, Rosen B, Rosenthal N, Rossant J, Ruiz Noppinger P, Ryder E, Skarnes W, Schick J, Schnütgen F, Schofield P, Seisenberger C, Selloum M, Smedley D, Simpson E, Stewart A, Teboul L, Tocchini Valentini G, Valenzuela D, West A, Wurst W. Genome wide conditional mouse knockout resources. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/j.ddmod.2017.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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10
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Vincenti S, Brillante N, Lanza V, Bozzoni I, Presutti C, Chiani F, Etna MP, Negri R. HUVEC respond to radiation by inducing the expression of pro-angiogenic microRNAs. Radiat Res 2011; 175:535-46. [PMID: 21361781 DOI: 10.1667/rr2200.1] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
MicroRNAs (miRNAs) represent a class of small non-coding RNAs that control gene expression by targeting mRNAs and triggering either repression of translation or RNA degradation. They have been shown to be involved in a variety of biological processes such as development, differentiation and cell cycle control, but little is known about their involvement in the response to irradiation. We showed here that in human umbilical vein endothelial cells (HUVEC) some miRNAs previously shown to have a crucial role in vascular biology are transiently modulated in response to a clinically relevant dose of ionizing radiation. In particular we identified an early transcriptional induction of several members of the microRNA cluster 17-92 and other microRNAs already known to be related to angiogenesis. At the same time we observed a peculiar behavior of the miR-221/222 cluster, suggesting an important role of these microRNAs in HUVEC homeostasis. We observed an increased efficiency in the formation of capillary-like structures in irradiated HUVEC. These results could lead to a new interpretation of the effect of ionizing radiation on endothelial cells and on the response of tumor endothelial bed cells to radiotherapy.
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Affiliation(s)
- Sara Vincenti
- Dipartimento di Biologia e Biotecnologie C. Darwin, Laboratorio di Genomica Funzionale e Proteomica dei Sistemi Modello, University "La Sapienza", Rome, Italy
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11
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Chiani F, Iannone C, Negri R, Paoletti D, D’Antonio M, De Meo PD, Castrignanò T. Radiation Genes: a database devoted to microarrays screenings revealing transcriptome alterations induced by ionizing radiation in mammalian cells. Database (Oxford) 2009; 2009:bap007. [PMID: 20157480 PMCID: PMC2790304 DOI: 10.1093/database/bap007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2009] [Revised: 05/07/2009] [Accepted: 06/13/2009] [Indexed: 11/13/2022]
Abstract
The analysis of the great extent of data generated by using DNA microarrays technologies has shown that the transcriptional response to radiation can be considerably different depending on the quality, the dose range and dose rate of radiation, as well as the timing selected for the analysis. At present, it is very difficult to integrate data obtained under several experimental conditions in different biological systems to reach overall conclusions or build regulatory models which may be tested and validated. In fact, most available data is buried in different websites, public or private, in general or local repositories or in files included in published papers; it is often in various formats, which makes a wide comparison even more difficult. The Radiation Genes Database (http://www.caspur.it/RadiationGenes) collects microarrays data from various local and public repositories or from published papers and supplementary materials. The database classifies it in terms of significant variables, such as radiation quality, dose, dose rate and sampling timing, as to provide user-friendly tools to facilitate data integration and comparison.
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Affiliation(s)
- Francesco Chiani
- Laboratory of Functional Genomics and Proteomics of Model Systems, Department of Cell Biology and Development, University of Rome, La Sapienza and Consorzio Interuniversitario per le Applicazioni di Supercalcolo per Università e Ricerca, Rome, Italy
| | - Camilla Iannone
- Laboratory of Functional Genomics and Proteomics of Model Systems, Department of Cell Biology and Development, University of Rome, La Sapienza and Consorzio Interuniversitario per le Applicazioni di Supercalcolo per Università e Ricerca, Rome, Italy
| | - Rodolfo Negri
- Laboratory of Functional Genomics and Proteomics of Model Systems, Department of Cell Biology and Development, University of Rome, La Sapienza and Consorzio Interuniversitario per le Applicazioni di Supercalcolo per Università e Ricerca, Rome, Italy
| | - Daniele Paoletti
- Laboratory of Functional Genomics and Proteomics of Model Systems, Department of Cell Biology and Development, University of Rome, La Sapienza and Consorzio Interuniversitario per le Applicazioni di Supercalcolo per Università e Ricerca, Rome, Italy
| | - Mattia D’Antonio
- Laboratory of Functional Genomics and Proteomics of Model Systems, Department of Cell Biology and Development, University of Rome, La Sapienza and Consorzio Interuniversitario per le Applicazioni di Supercalcolo per Università e Ricerca, Rome, Italy
| | - Paolo D’onorio De Meo
- Laboratory of Functional Genomics and Proteomics of Model Systems, Department of Cell Biology and Development, University of Rome, La Sapienza and Consorzio Interuniversitario per le Applicazioni di Supercalcolo per Università e Ricerca, Rome, Italy
| | - Tiziana Castrignanò
- Laboratory of Functional Genomics and Proteomics of Model Systems, Department of Cell Biology and Development, University of Rome, La Sapienza and Consorzio Interuniversitario per le Applicazioni di Supercalcolo per Università e Ricerca, Rome, Italy
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12
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Cioci F, Di Felice F, Chiani F, Camilloni G. DNA protein interactions at the rRNA of Saccharomyces cerevisiae. Ital J Biochem 2007; 56:81-90. [PMID: 17722648] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The rDNA cluster is the genetic locus encoding the ribosomal RNAs and physically defines where ribosomes begin to be assembled. In the yeast Saccharomyces cerevisiae, the highly repetitive structure of this locus makes it a very interesting target for studies about genome stability, chromatin-mediated transcriptional silencing and progression of aging. In fact, recombination among the repeated units is suppressed in a WT cell. Moreover, when genes transcribed by RNA polymerase II are inserted in the rDNA cluster, their transcription is silenced. Finally, the formation of rDNA minicircles (ERCs) has been shown to be one of the causes of aging in yeast. DNA topoisomerase I have been shown to suppress recombination specifically at the rDNA of S.cerevisiae. Moreover, also the chromatin structure of this locus is affected in a top1 strain, because rDNA specific transcriptional silencing is abolished. Nonetheless, the molecular basis of how this enzyme interferes with these functions is yet unknown. Here are reported results obtained by in vivo studies of DNA protein interactions occurring on the rDNA locus. The analyses include a fine mapping of nucleosome positioning; RNA polymerase I transcription factors and DNA topoisomerase I cleavage sites. Important conclusions can be drawn: i) nucleosome positioning in the Non Transcribed Spacer is not affected by RNA polymerase I transcription; ii) the RNA polymerase I transcription factors bind DNA in vivo with a defined hierarchy; iii) the DNA topoisomerase I cleaves the NTS in very specific sites, but cleavage is not induced by RNA polymerase I transcription. These in vivo studies help to characterize the molecular basis of important phenomena as the transcriptional silencing and genome stability in yeast.
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Affiliation(s)
- Francesco Cioci
- Dipartimento di Genetica e Biologia Molecolare, Università di Roma La Sapienza
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13
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Chiani F, Felice FD, Camilloni G. SIR2 modifies histone H4-K16 acetylation and affects superhelicity in the ARS region of plasmid chromatin in Saccharomyces cerevisiae. Nucleic Acids Res 2006; 34:5426-37. [PMID: 17012273 PMCID: PMC1636471 DOI: 10.1093/nar/gkl678] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The null mutation of the SIR2 gene in Saccharomyces cerevisiae has been associated with a series of different phenotypes including loss of transcriptional silencing, genome instability and replicative aging. Thus, the SIR2 gene product is an important constituent of the yeast cell. SIR2 orthologues and paralogues have been discovered in organisms ranging from bacteria to man, underscoring the pivotal role of this protein. Here we report that a plasmid introduced into sir2Delta cells accumulates more negative supercoils compared to the same plasmid introduced into wild-type (WT) cells. This effect appears to be directly related to SIR2 expression as shown by the reduction of negative supercoiling when SIR2 is overexpressed, and does not depend on the number or positioning of nucleosomes on plasmids. Our results indicate that this new phenotype is due to the lack of Sir2p histone deacetylase activity in the sir2Delta strain, because only the H4-K16 residue of the histone octamer undergoes an alteration of its acetylation state. A model proposing interference with the replication machinery is discussed.
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Affiliation(s)
| | | | - Giorgio Camilloni
- Istituto di Biologia e Patologia Molecolari, CNRRome, Italy
- To whom correspondence should be addressed. Tel: +390649912808; Fax: +390649912500;
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14
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Mai A, Massa S, Lavu S, Pezzi R, Simeoni S, Ragno R, Mariotti FR, Chiani F, Camilloni G, Sinclair DA. Design, Synthesis, and Biological Evaluation of Sirtinol Analogues as Class III Histone/Protein Deacetylase (Sirtuin) Inhibitors. J Med Chem 2005; 48:7789-95. [PMID: 16302818 DOI: 10.1021/jm050100l] [Citation(s) in RCA: 134] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In a search for potent inhibitors of class III histone/protein deacetylases (sirtuins), a series of sirtinol analogues have been synthesized and the degree of inhibition was assessed in vitro using recombinant yeast Sir2, human SIRT1, and human SIRT2 and in vivo with a yeast phenotypic assay. Two analogues, namely, 3- and 4-[(2-hydroxy-1-naphthalenylmethylene)amino]-N-(1-phenylethyl)benzamide (i.e., m- and p-sirtinol), were 2- to 10-fold more potent than sirtinol against human SIRT1 and SIRT2 enzymes. In yeast in vivo assay, these two small molecules were as potent as sirtinol. Compounds lacking the 2-hydroxy group at the naphthalene moiety or bearing several modifications at the benzene 2'-position of the aniline portion (carbethoxy, carboxy, and cyano) were 1.3-13 times less potent than sirtinol, whereas the 2'-carboxamido analogue was totally inactive. Both (R)- and (S)-sirtinol had similar inhibitory effects on the yeast and human enzymes, demonstrating no enantioselective inhibitory effect.
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Affiliation(s)
- Antonello Mai
- Dipartimento di Studi Farmaceutici, Istituto Pasteur, Fondazione Cenci Bolognetti, Università degli Studi di Roma "La Sapienza", P. le A. Moro 5, 00185 Roma, Italy.
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