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Agarwal G, Varghese S, Francis M, Willan J. High prevalence of persistent COVID-19-related health anxiety and social restriction in patients with haematological disorders. Br J Haematol 2023; 202:1065-1070. [PMID: 37408108 DOI: 10.1111/bjh.18960] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Revised: 06/17/2023] [Accepted: 06/19/2023] [Indexed: 07/07/2023]
Affiliation(s)
- G Agarwal
- Medical Sciences Division, University of Oxford, Oxford, UK
| | - S Varghese
- Medical Sciences Division, University of Oxford, Oxford, UK
| | - M Francis
- Medical Sciences Division, University of Oxford, Oxford, UK
| | - J Willan
- Department of Haematology, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
- Department of Haematology, Frimley Health NHS Foundation Trust, Slough, UK
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Willan J, Cleasby AJ, Flores-Rodriguez N, Stefani F, Rinaldo C, Pisciottani A, Grant E, Woodman P, Bryant HE, Ciani B. ESCRT-III is necessary for the integrity of the nuclear envelope in micronuclei but is aberrant at ruptured micronuclear envelopes generating damage. Oncogenesis 2019; 8:29. [PMID: 30988276 PMCID: PMC6465242 DOI: 10.1038/s41389-019-0136-0] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [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: 11/21/2018] [Revised: 02/28/2019] [Accepted: 03/27/2019] [Indexed: 12/21/2022] Open
Abstract
Micronuclei represent the cellular attempt to compartmentalize DNA to maintain genomic integrity threatened by mitotic errors and genotoxic events. Some micronuclei show aberrant nuclear envelopes (NEs) that collapse, generating damaged DNA that can promote complex genome alterations. However, ruptured micronuclei also provide a pool of cytosolic DNA that can stimulate antitumor immunity, revealing the complexity of micronuclear impact on tumor progression. The ESCRT-III (Endosomal Sorting Complex Required for Transport-III) complex ensures NE reseals during late mitosis and is repaired in interphase. Therefore, ESCRT-III activity maybe crucial for maintaining the integrity of other genomic structures enclosed by a NE. ESCRT-III activity at the NE is coordinated by the subunit CHMP7. We show that CHMP7 and ESCRT-III protect against the genomic instability associated with micronuclei formation. Loss of ESCRT-III activity increases the population of micronuclei with ruptured NEs, revealing that its NE repair activity is also necessary to maintain micronuclei integrity. Surprisingly, aberrant accumulation of ESCRT-III are found at the envelope of most acentric collapsed micronuclei, suggesting that ESCRT-III is not recycled efficiently from these structures. Moreover, CHMP7 depletion relieves micronuclei from the aberrant accumulations of ESCRT-III. CHMP7-depleted cells display a reduction in micronuclei containing the DNA damage marker RPA and a sensor of cytosolic DNA. Thus, ESCRT-III activity appears to protect from the consequence of genomic instability in a dichotomous fashion: ESCRT-III membrane repair activity prevents the occurrence of micronuclei with weak envelopes, but the aberrant accumulation of ESCRT-III on a subset of micronuclei appears to exacerbate DNA damage and sustain proinflammatory pathways.
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Affiliation(s)
- Jessica Willan
- Department of Chemistry, Centre for Membrane Interactions and Dynamics (CMIAD), Krebs Institute, University of Sheffield, Brook Hill, Sheffield, S3 7HF, United Kingdom.,Academic Unit of Molecular Oncology, Sheffield Institute for Nucleic Acids (SInFoNiA), Department of Oncology and Metabolism, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom
| | - Alexa J Cleasby
- Department of Chemistry, Centre for Membrane Interactions and Dynamics (CMIAD), Krebs Institute, University of Sheffield, Brook Hill, Sheffield, S3 7HF, United Kingdom
| | | | - Flavia Stefani
- School of Biological Sciences, Faculty of Biology Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, United Kingdom
| | - Cinzia Rinaldo
- IBPM-CNR c/o Universita' degli Studi di Roma Sapienza, Rome, Italy.,Unit of Cellular Networks and Molecular Therapeutic Targets, IRCCS-Regina Elena National Cancer Institute, Rome, Italy
| | | | - Emma Grant
- Department of Chemistry, Centre for Membrane Interactions and Dynamics (CMIAD), Krebs Institute, University of Sheffield, Brook Hill, Sheffield, S3 7HF, United Kingdom.,Academic Unit of Molecular Oncology, Sheffield Institute for Nucleic Acids (SInFoNiA), Department of Oncology and Metabolism, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom
| | - Philip Woodman
- School of Biological Sciences, Faculty of Biology Medicine and Health, University of Manchester, Manchester Academic Health Science Centre, Manchester, M13 9PT, United Kingdom.
| | - Helen E Bryant
- Academic Unit of Molecular Oncology, Sheffield Institute for Nucleic Acids (SInFoNiA), Department of Oncology and Metabolism, University of Sheffield, Beech Hill Road, Sheffield, S10 2RX, United Kingdom.
| | - Barbara Ciani
- Department of Chemistry, Centre for Membrane Interactions and Dynamics (CMIAD), Krebs Institute, University of Sheffield, Brook Hill, Sheffield, S3 7HF, United Kingdom.
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