1
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Tonello M, Baratti D, Sammartino P, Di Giorgio A, Robella M, Sassaroli C, Framarini M, Valle M, Macrì A, Graziosi L, Coccolini F, Lippolis PV, Gelmini R, Deraco M, Biacchi D, Aulicino M, Vaira M, De Franciscis S, D'Acapito F, Carboni F, Milone E, Donini A, Fugazzola P, Faviana P, Sorrentino L, Pizzolato E, Cenzi C, Del Bianco P, Sommariva A. Prognostic value of specific KRAS mutations in patients with colorectal peritoneal metastases. ESMO Open 2024; 9:102976. [PMID: 38613907 PMCID: PMC11033065 DOI: 10.1016/j.esmoop.2024.102976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 02/17/2024] [Accepted: 02/29/2024] [Indexed: 04/15/2024] Open
Abstract
BACKGROUND There is little evidence on KRAS mutational profiles in colorectal cancer (CRC) peritoneal metastases (PM). This study aims to determine the prevalence of specific KRAS mutations and their prognostic value in a homogeneous cohort of patients with isolated CRC PM treated with cytoreductive surgery and hyperthermic intraperitoneal chemotherapy. MATERIALS AND METHODS Data were collected from 13 Italian centers, gathered in a collaborative group of the Italian Society of Surgical Oncology. KRAS mutation subtypes have been correlated with clinical and pathological characteristics and survival [overall survival (OS), local (peritoneal) disease-free survival (LDFS) and disease-free survival (DFS)]. RESULTS KRAS mutations occurred in 172 patients (47.5%) out of the 362 analyzed. Two different prognostic groups of KRAS mutation subtypes were identified: KRASMUT1 (G12R, G13A, G13C, G13V, Q61H, K117N, A146V), median OS > 120 months and KRASMUT2 (G12A, G12C, G12D, G12S, G12V, G13D, A59E, A59V, A146T), OS: 31.2 months. KRASMUT2 mutations mainly occurred in the P-loop region (P < 0.001) with decreased guanosine triphosphate (GTP) hydrolysis activity (P < 0.001) and were more frequently related to size (P < 0.001) and polarity change (P < 0.001) of the substituted amino acid (AA). When KRASMUT1 and KRASMUT2 were combined with other known prognostic factors (peritoneal cancer index, completeness of cytoreduction score, grading, signet ring cell, N status) in multivariate analysis, KRASMUT1 showed a similar survival rate to KRASWT patients, whereas KRASMUT2 was independently associated with poorer prognosis (hazard ratios: OS 2.1, P < 0.001; DFS 1.9, P < 0.001; LDFS 2.5, P < 0.0001). CONCLUSIONS In patients with CRC PM, different KRAS mutation subgroups can be determined according to specific codon substitution, with some mutations (KRASMUT1) that could have a similar prognosis to wild-type patients. These findings should be further investigated in larger series.
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Affiliation(s)
- M Tonello
- Unit of Surgical Oncology of the Esophagus and Digestive Tract, Veneto Institute of Oncology IOV-IRCCS, Padua
| | - D Baratti
- Peritoneal Surface Malignancy Unit, Department of Surgery, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan
| | - P Sammartino
- Cytoreductive Surgery and HIPEC Unit, Department of Surgery 'Pietro Valdoni', Sapienza University of Rome, Rome
| | - A Di Giorgio
- Surgical Unit of Peritoneum and Retroperitoneum, Fondazione Policlinico Universitario A. Gemelli, Rome
| | - M Robella
- Surgical Oncology Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Turin
| | - C Sassaroli
- Integrated Medical Surgical Research in Peritoneal Surface Malignancy, Abdominal Oncology Department, Istituto Nazionale per lo Studio e la Cura dei Tumori Fondazione Pascale IRCCS, Naples
| | - M Framarini
- General and Oncologic Department of Surgery, Morgagni-Pierantoni Hospital, AUSL Romagna, Forlì
| | - M Valle
- Peritoneal Tumours Unit, IRCCS, Regina Elena Cancer Institute, Rome
| | - A Macrì
- Peritoneal and Retroperitonel Surgical Unit-University Hospital 'G. Martino' Messina
| | - L Graziosi
- General and Emergency Surgery Department, University of Perugia, Santa Maria Della Misericordia Hospital, Perugia
| | - F Coccolini
- General Emergency and Trauma Surgery, Bufalini Hospital, Cesena; General Emergency and Trauma Surgery, Pisa University Hospital, Pisa
| | - P V Lippolis
- General and Peritoneal Surgery, Department of Surgery, Hospital University Pisa (AOUP), Pisa
| | - R Gelmini
- General and Oncological Surgery Unit, AOU of Modena University of Modena and Reggio Emilia
| | - M Deraco
- Peritoneal Surface Malignancy Unit, Department of Surgery, Fondazione IRCCS Istituto Nazionale dei Tumori, Milan
| | - D Biacchi
- Cytoreductive Surgery and HIPEC Unit, Department of Surgery 'Pietro Valdoni', Sapienza University of Rome, Rome
| | - M Aulicino
- Surgical Unit of Peritoneum and Retroperitoneum, Fondazione Policlinico Universitario A. Gemelli, Rome
| | - M Vaira
- Surgical Oncology Unit, Candiolo Cancer Institute, FPO-IRCCS, Candiolo, Turin
| | - S De Franciscis
- Colorectal Surgical Oncology, Abdominal Oncology Department, Istituto Nazionale per lo Studio e la Cura dei Tumori Fondazione Pascale IRCCS, Naples
| | - F D'Acapito
- General and Oncologic Department of Surgery, Morgagni-Pierantoni Hospital, AUSL Romagna, Forlì
| | - F Carboni
- Peritoneal Tumours Unit, IRCCS, Regina Elena Cancer Institute, Rome
| | - E Milone
- Peritoneal and Retroperitonel Surgical Unit-University Hospital 'G. Martino' Messina
| | - A Donini
- General and Emergency Surgery Department, University of Perugia, Santa Maria Della Misericordia Hospital, Perugia
| | - P Fugazzola
- General surgery, Fondazione IRCCS Policlinico San Matteo, Pavia
| | - P Faviana
- Department of Surgical, Medical, Molecular Pathology and Critical Area, University of Pisa, Pisa
| | - L Sorrentino
- General and Oncological Surgery Unit, AOU of Modena University of Modena and Reggio Emilia
| | - E Pizzolato
- Unit of Surgical Oncology of the Esophagus and Digestive Tract, Veneto Institute of Oncology IOV-IRCCS, Padua
| | - C Cenzi
- Clinical Research Unit, Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - P Del Bianco
- Clinical Research Unit, Veneto Institute of Oncology IOV-IRCCS, Padua, Italy
| | - A Sommariva
- Unit of Surgical Oncology of the Esophagus and Digestive Tract, Veneto Institute of Oncology IOV-IRCCS, Padua.
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2
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Eraña H, Díaz-Domínguez CM, Charco JM, Vidal E, González-Miranda E, Pérez-Castro MA, Piñeiro P, López-Moreno R, Sampedro-Torres-Quevedo C, Fernández-Veiga L, Tasis-Galarza J, Lorenzo NL, Santini-Santiago A, Lázaro M, García-Martínez S, Gonçalves-Anjo N, San-Juan-Ansoleaga M, Galarza-Ahumada J, Fernández-Muñoz E, Giler S, Valle M, Telling GC, Geijó M, Requena JR, Castilla J. Understanding the key features of the spontaneous formation of bona fide prions through a novel methodology that enables their swift and consistent generation. Acta Neuropathol Commun 2023; 11:145. [PMID: 37679832 PMCID: PMC10486007 DOI: 10.1186/s40478-023-01640-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Accepted: 08/20/2023] [Indexed: 09/09/2023] Open
Abstract
Among transmissible spongiform encephalopathies or prion diseases affecting humans, sporadic forms such as sporadic Creutzfeldt-Jakob disease are the vast majority. Unlike genetic or acquired forms of the disease, these idiopathic forms occur seemingly due to a random event of spontaneous misfolding of the cellular PrP (PrPC) into the pathogenic isoform (PrPSc). Currently, the molecular mechanisms that trigger and drive this event, which occurs in approximately one individual per million each year, remain completely unknown. Modelling this phenomenon in experimental settings is highly challenging due to its sporadic and rare occurrence. Previous attempts to model spontaneous prion misfolding in vitro have not been fully successful, as the spontaneous formation of prions is infrequent and stochastic, hindering the systematic study of the phenomenon. In this study, we present the first method that consistently induces spontaneous misfolding of recombinant PrP into bona fide prions within hours, providing unprecedented possibilities to investigate the mechanisms underlying sporadic prionopathies. By fine-tuning the Protein Misfolding Shaking Amplification method, which was initially developed to propagate recombinant prions, we have created a methodology that consistently produces spontaneously misfolded recombinant prions in 100% of the cases. Furthermore, this method gives rise to distinct strains and reveals the critical influence of charged surfaces in this process.
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Affiliation(s)
- Hasier Eraña
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
- ATLAS Molecular Pharma S. L. Bizkaia Technology Park, 48160, Derio, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Carlos III National Health Institute, 28029, Madrid, Spain
| | - Carlos M Díaz-Domínguez
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Carlos III National Health Institute, 28029, Madrid, Spain
| | - Jorge M Charco
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
- ATLAS Molecular Pharma S. L. Bizkaia Technology Park, 48160, Derio, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Carlos III National Health Institute, 28029, Madrid, Spain
| | - Enric Vidal
- IRTA, Programa de Sanitat Animal, Centre de Recerca en Sanitat Animal (CReSA), Campus de la Universitat Autònoma de Barcelona (UAB), Bellaterra, Catalonia, Spain
| | - Ezequiel González-Miranda
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Miguel A Pérez-Castro
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Patricia Piñeiro
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Rafael López-Moreno
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Cristina Sampedro-Torres-Quevedo
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Leire Fernández-Veiga
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Juan Tasis-Galarza
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Nuria L Lorenzo
- CIMUS Biomedical Research Institute and Department of Medical Sciences, University of Santiago de Compostela-IDIS, 15782, Santiago de Compostela, Spain
| | - Aileen Santini-Santiago
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Melisa Lázaro
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Sandra García-Martínez
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Nuno Gonçalves-Anjo
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Maitena San-Juan-Ansoleaga
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Josu Galarza-Ahumada
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Eva Fernández-Muñoz
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Samanta Giler
- IRTA, Programa de Sanitat Animal, Centre de Recerca en Sanitat Animal (CReSA), Campus de la Universitat Autònoma de Barcelona (UAB), Bellaterra, Catalonia, Spain
| | - Mikel Valle
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain
| | - Glenn C Telling
- Prion Research Center (PRC), Colorado State University, Fort Collins, CO, 80523, USA
| | - Mariví Geijó
- Animal Health Department, NEIKER-Basque Institute for Agricultural Research and Development, Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Spain
| | - Jesús R Requena
- CIMUS Biomedical Research Institute and Department of Medical Sciences, University of Santiago de Compostela-IDIS, 15782, Santiago de Compostela, Spain
| | - Joaquín Castilla
- Center for Cooperative Research in Biosciences (CIC bioGUNE), Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, 48160, Derio, Bizkaia, Spain.
- Centro de Investigación Biomédica en Red de Enfermedades Infecciosas (CIBERINFEC), Carlos III National Health Institute, 28029, Madrid, Spain.
- IKERBASQUE, Basque Foundation for Science, 48011, Bilbao, Spain.
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3
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Gershman A, Hauck Q, Dick M, Jamison JM, Tassia M, Agirrezabala X, Muhammad S, Ali R, Workman RE, Valle M, Wong GW, Welch KC, Timp W. Genomic insights into metabolic flux in hummingbirds. Genome Res 2023; 33:703-714. [PMID: 37156619 PMCID: PMC10317124 DOI: 10.1101/gr.276779.122] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Accepted: 04/26/2023] [Indexed: 05/10/2023]
Abstract
Hummingbirds are very well adapted to sustain efficient and rapid metabolic shifts. They oxidize ingested nectar to directly fuel flight when foraging but have to switch to oxidizing stored lipids derived from ingested sugars during the night or long-distance migratory flights. Understanding how this organism moderates energy turnover is hampered by a lack of information regarding how relevant enzymes differ in sequence, expression, and regulation. To explore these questions, we generated a chromosome-scale genome assembly of the ruby-throated hummingbird (A. colubris) using a combination of long- and short-read sequencing, scaffolding it using existing assemblies. We then used hybrid long- and short-read RNA sequencing of liver and muscle tissue in fasted and fed metabolic states for a comprehensive transcriptome assembly and annotation. Our genomic and transcriptomic data found positive selection of key metabolic genes in nectivorous avian species and deletion of critical genes (SLC2A4, GCK) involved in glucostasis in other vertebrates. We found expression of a fructose-specific version of SLC2A5 putatively in place of insulin-sensitive SLC2A5, with predicted protein models suggesting affinity for both fructose and glucose. Alternative isoforms may even act to sequester fructose to preclude limitations from transport in metabolism. Finally, we identified differentially expressed genes from fasted and fed hummingbirds, suggesting key pathways for the rapid metabolic switch hummingbirds undergo.
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Affiliation(s)
- Ariel Gershman
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
- Department of Molecular Biology and Genetics, Johns Hopkins University, Baltimore, Maryland 21287, USA
| | - Quinn Hauck
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - Morag Dick
- Cell & Systems Biology, University of Toronto, Toronto, Ontario M5S 3G5, Canada
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario, M1C 1A4, Canada
| | - Jerrica M Jamison
- Cell & Systems Biology, University of Toronto, Toronto, Ontario M5S 3G5, Canada
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario, M1C 1A4, Canada
| | - Michael Tassia
- Department of Biology, Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - Xabier Agirrezabala
- CIC bioGUNE, Basque Research and Technology Alliance (BRTA), 48160 Derio, Spain
| | - Saad Muhammad
- Cell & Systems Biology, University of Toronto, Toronto, Ontario M5S 3G5, Canada
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario, M1C 1A4, Canada
| | - Raafay Ali
- Cell & Systems Biology, University of Toronto, Toronto, Ontario M5S 3G5, Canada
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario, M1C 1A4, Canada
| | - Rachael E Workman
- Department of Molecular Biology and Genetics, Johns Hopkins University, Baltimore, Maryland 21287, USA
| | - Mikel Valle
- CIC bioGUNE, Basque Research and Technology Alliance (BRTA), 48160 Derio, Spain
| | - G William Wong
- Department of Physiology and Center for Metabolism and Obesity Research, School of Medicine, The Johns Hopkins University, Baltimore, Maryland 21205, USA
| | - Kenneth C Welch
- Cell & Systems Biology, University of Toronto, Toronto, Ontario M5S 3G5, Canada
- Department of Biological Sciences, University of Toronto Scarborough, Toronto, Ontario, M1C 1A4, Canada
| | - Winston Timp
- Department of Biomedical Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA;
- Department of Molecular Biology and Genetics, Johns Hopkins University, Baltimore, Maryland 21287, USA
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4
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Iriondo MN, Etxaniz A, Varela YR, Ballesteros U, Lázaro M, Valle M, Fracchiolla D, Martens S, Montes LR, Goñi FM, Alonso A. Effect of ATG12-ATG5-ATG16L1 autophagy E3-like complex on the ability of LC3/GABARAP proteins to induce vesicle tethering and fusion. Cell Mol Life Sci 2023; 80:56. [PMID: 36729310 PMCID: PMC9894987 DOI: 10.1007/s00018-023-04704-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [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: 08/05/2022] [Revised: 01/19/2023] [Accepted: 01/20/2023] [Indexed: 02/03/2023]
Abstract
In macroautophagy, the autophagosome (AP) engulfs portions of cytoplasm to allow their lysosomal degradation. AP formation in humans requires the concerted action of the ATG12 and LC3/GABARAP conjugation systems. The ATG12-ATG5-ATG16L1 or E3-like complex (E3 for short) acts as a ubiquitin-like E3 enzyme, promoting LC3/GABARAP proteins anchoring to the AP membrane. Their role in the AP expansion process is still unclear, in part because there are no studies comparing six LC3/GABARAP family member roles under the same conditions, and also because the full human E3 was only recently available. In the present study, the lipidation of six members of the LC3/GABARAP family has been reconstituted in the presence and absence of E3, and the mechanisms by which E3 and LC3/GABARAP proteins participate in vesicle tethering and fusion have been investigated. In the absence of E3, GABARAP and GABARAPL1 showed the highest activities. Differences found within LC3/GABARAP proteins suggest the existence of a lipidation threshold, lower for the GABARAP subfamily, as a requisite for tethering and inter-vesicular lipid mixing. E3 increases and speeds up lipidation and LC3/GABARAP-promoted tethering. However, E3 hampers LC3/GABARAP capacity to induce inter-vesicular lipid mixing or subsequent fusion, presumably through the formation of a rigid scaffold on the vesicle surface. Our results suggest a model of AP expansion in which the growing regions would be areas where the LC3/GABARAP proteins involved should be susceptible to lipidation in the absence of E3, or else a regulatory mechanism would allow vesicle incorporation and phagophore growth when E3 is present.
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Affiliation(s)
- Marina N. Iriondo
- Instituto Biofisika (UPV/EHU, CSIC), University of the Basque Country, 48940 Leioa, Spain ,Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain
| | - Asier Etxaniz
- Instituto Biofisika (UPV/EHU, CSIC), University of the Basque Country, 48940 Leioa, Spain ,Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain
| | - Yaiza R. Varela
- Instituto Biofisika (UPV/EHU, CSIC), University of the Basque Country, 48940 Leioa, Spain ,Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain
| | - Uxue Ballesteros
- Instituto Biofisika (UPV/EHU, CSIC), University of the Basque Country, 48940 Leioa, Spain ,Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain
| | - Melisa Lázaro
- CIC bioGUNE, Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia Spain
| | - Mikel Valle
- CIC bioGUNE, Basque Research and Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia Spain
| | - Dorotea Fracchiolla
- Max Perutz Labs, University of Vienna, Vienna BioCenter, Dr. Bohr-Gasse 9, 1030 Vienna, Austria
| | - Sascha Martens
- Max Perutz Labs, University of Vienna, Vienna BioCenter, Dr. Bohr-Gasse 9, 1030 Vienna, Austria
| | - L. Ruth Montes
- Instituto Biofisika (UPV/EHU, CSIC), University of the Basque Country, 48940 Leioa, Spain ,Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain
| | - Félix M. Goñi
- Instituto Biofisika (UPV/EHU, CSIC), University of the Basque Country, 48940 Leioa, Spain ,Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940 Leioa, Spain
| | - Alicia Alonso
- Instituto Biofisika (UPV/EHU, CSIC), University of the Basque Country, 48940, Leioa, Spain. .,Department of Biochemistry and Molecular Biology, University of the Basque Country, 48940, Leioa, Spain.
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5
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López-Alonso JP, Lázaro M, Gil-Cartón D, Choi PH, Dodu A, Tong L, Valle M. Author Correction: CryoEM structural exploration of catalytically active enzyme pyruvate carboxylase. Nat Commun 2022; 13:7009. [PMID: 36385225 PMCID: PMC9668820 DOI: 10.1038/s41467-022-34543-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Affiliation(s)
- Jorge Pedro López-Alonso
- grid.420175.50000 0004 0639 2420CIC bioGUNE, Basque Research & Technology Alliance (BRTA), Bizkaia Technology Park, Derio, Bizkaia Spain ,grid.11480.3c0000000121671098Present Address: Basque Resource for Electron Microscopy, Instituto Biofisika (CSIC - UPV/EHU), Leioa, Spain
| | - Melisa Lázaro
- grid.420175.50000 0004 0639 2420CIC bioGUNE, Basque Research & Technology Alliance (BRTA), Bizkaia Technology Park, Derio, Bizkaia Spain
| | - David Gil-Cartón
- grid.420175.50000 0004 0639 2420CIC bioGUNE, Basque Research & Technology Alliance (BRTA), Bizkaia Technology Park, Derio, Bizkaia Spain ,grid.424810.b0000 0004 0467 2314IKERBASQUE, Basque Foundation for Science, Bilbao, Spain ,grid.11480.3c0000000121671098Present Address: Basque Resource for Electron Microscopy, Instituto Biofisika (CSIC - UPV/EHU), Leioa, Spain
| | - Philip H. Choi
- grid.21729.3f0000000419368729Department of Biological Sciences, Columbia University, New York, NY USA
| | - Alexandra Dodu
- grid.420175.50000 0004 0639 2420CIC bioGUNE, Basque Research & Technology Alliance (BRTA), Bizkaia Technology Park, Derio, Bizkaia Spain
| | - Liang Tong
- grid.21729.3f0000000419368729Department of Biological Sciences, Columbia University, New York, NY USA
| | - Mikel Valle
- grid.420175.50000 0004 0639 2420CIC bioGUNE, Basque Research & Technology Alliance (BRTA), Bizkaia Technology Park, Derio, Bizkaia Spain
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6
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Ballesteros U, Etxaniz A, Iriondo MN, Varela YR, Lázaro M, Viguera AR, Montes LR, Valle M, Goñi FM, Alonso A. Autophagy protein LC3C binding to phospholipid and interaction with lipid membranes. Int J Biol Macromol 2022; 212:432-441. [PMID: 35618088 DOI: 10.1016/j.ijbiomac.2022.05.129] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 05/16/2022] [Accepted: 05/17/2022] [Indexed: 01/18/2023]
Abstract
Autophagy is a process in which parts of the eukaryotic cell are selectively degraded in the lysosome. The materials to be catabolized are first surrounded by a double-membrane structure, the autophagosome. Autophagosome generation is a complex event, in which many proteins are involved. Among the latter, yeast Atg8 or its mammalian orthologues are essential in autophagosome membrane elongation, shaping and closure. A subfamily of the human Atg8 orthologues is formed by the proteins LC3A, LC3B, and LC3C. Previous studies suggest that, at variance with the other two, LC3C does not participate in cardiolipin-mediated mitophagy. The present study was devoted to exploring the binding of LC3C to lipid vesicles, bilayers and monolayers, and the ensuing protein-dependent perturbing effects, in the absence of the mitochondrial lipid cardiolipin. All Atg8 orthologues are covalently bound to a phospholipid prior to their involvement in autophagosome elongation. In our case, a mutant in the C-terminal amino acid, LC3C G126C, together with the use of a maleimide-derivatized phosphatidyl ethanolamine, ensured LC3C lipidation, up to 100% under certain conditions. Ultracentrifugation, surface pressure measurements, spectroscopic and cryo-electron microscopic techniques revealed that lipidated LC3C induced vesicle aggregation (5-fold faster in sonicated than in large unilamellar vesicles) and inter-vesicular lipid mixing (up to 82%), including inner-monolayer lipid mixing (up to 32%), consistent with in vitro partial vesicle fusion. LC3C was also able to cause the release of 80-90% vesicular aqueous contents. The data support the idea that LC3C would be able to help in autophagosome elongation/fusion in autophagy phenomena.
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Affiliation(s)
- Uxue Ballesteros
- Instituto Biofisika (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, 48940 Leioa, Spain
| | - Asier Etxaniz
- Instituto Biofisika (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, 48940 Leioa, Spain
| | - Marina N Iriondo
- Instituto Biofisika (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, 48940 Leioa, Spain
| | - Yaiza R Varela
- Instituto Biofisika (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, 48940 Leioa, Spain
| | - Melisa Lázaro
- CIC bioGUNE, Basque Research & Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia, Spain
| | - Ana R Viguera
- Instituto Biofisika (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, 48940 Leioa, Spain
| | - L Ruth Montes
- Instituto Biofisika (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, 48940 Leioa, Spain
| | - Mikel Valle
- CIC bioGUNE, Basque Research & Technology Alliance (BRTA), Bizkaia Technology Park, Building 800, 48160 Derio, Bizkaia, Spain
| | - Félix M Goñi
- Instituto Biofisika (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, 48940 Leioa, Spain
| | - Alicia Alonso
- Instituto Biofisika (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, 48940 Leioa, Spain.
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7
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Agirrezabala X, Samatova E, Macher M, Liutkute M, Maiti M, Gil-Carton D, Novacek J, Valle M, Rodnina MV. A switch from α-helical to β-strand conformation during co-translational protein folding. EMBO J 2022; 41:e109175. [PMID: 34994471 PMCID: PMC8844987 DOI: 10.15252/embj.2021109175] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [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: 07/10/2021] [Revised: 11/30/2021] [Accepted: 12/06/2021] [Indexed: 11/09/2022] Open
Abstract
Cellular proteins begin to fold as they emerge from the ribosome. The folding landscape of nascent chains is not only shaped by their amino acid sequence but also by the interactions with the ribosome. Here, we combine biophysical methods with cryo‐EM structure determination to show that folding of a β‐barrel protein begins with formation of a dynamic α‐helix inside the ribosome. As the growing peptide reaches the end of the tunnel, the N‐terminal part of the nascent chain refolds to a β‐hairpin structure that remains dynamic until its release from the ribosome. Contacts with the ribosome and structure of the peptidyl transferase center depend on nascent chain conformation. These results indicate that proteins may start out as α‐helices inside the tunnel and switch into their native folds only as they emerge from the ribosome. Moreover, the correlation of nascent chain conformations with reorientation of key residues of the ribosomal peptidyl‐transferase center suggest that protein folding could modulate ribosome activity.
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Affiliation(s)
| | - Ekaterina Samatova
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, Gottingen, Germany
| | - Meline Macher
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, Gottingen, Germany
| | - Marija Liutkute
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, Gottingen, Germany
| | - Manisankar Maiti
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, Gottingen, Germany
| | - David Gil-Carton
- CIC bioGUNE, Basque Research and Technology Alliance (BRTA), Derio, Spain.,IKERBASQUE, Basque Foundation for Science, Bilbao, Spain
| | - Jiri Novacek
- CEITEC, Masaryk University, Brno, Czech Republic
| | - Mikel Valle
- CIC bioGUNE, Basque Research and Technology Alliance (BRTA), Derio, Spain
| | - Marina V Rodnina
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, Gottingen, Germany
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8
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Ramos-Esquivel A, Valle M, Chinchilla-Monge R. P-43 C677T and A1298C MTHFR gene polymorphisms and response to fluoropyrimidine-based chemotherapy in mestizo patients with metastatic colorectal cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.05.098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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9
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Ntai A, La Spada A, Valle M, Sconda A, Carlus-Charles H, Appierto V. Assessing genomic stability of pluripotent stem cells: why, when, and how. Cytotherapy 2021. [DOI: 10.1016/s1465324921004795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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10
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Lenza MP, Oyenarte I, Diercks T, Quintana JI, Gimeno A, Coelho H, Diniz A, Peccati F, Delgado S, Bosch A, Valle M, Millet O, Abrescia NGA, Palazón A, Marcelo F, Jiménez‐Osés G, Jiménez‐Barbero J, Ardá A, Ereño‐Orbea J. Structural Characterization of N-Linked Glycans in the Receptor Binding Domain of the SARS-CoV-2 Spike Protein and their Interactions with Human Lectins. Angew Chem Int Ed Engl 2020; 59:23763-23771. [PMID: 32915505 PMCID: PMC7894318 DOI: 10.1002/anie.202011015] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 09/08/2020] [Indexed: 01/17/2023]
Abstract
The glycan structures of the receptor binding domain of the SARS-CoV2 spike glycoprotein expressed in human HEK293F cells have been studied by using NMR. The different possible interacting epitopes have been deeply analysed and characterized, providing evidence of the presence of glycan structures not found in previous MS-based analyses. The interaction of the RBD 13 C-labelled glycans with different human lectins, which are expressed in different organs and tissues that may be affected during the infection process, has also been evaluated by NMR. In particular, 15 N-labelled galectins (galectins-3, -7 and -8 N-terminal), Siglecs (Siglec-8, Siglec-10), and C-type lectins (DC-SIGN, MGL) have been employed. Complementary experiments from the glycoprotein perspective or from the lectin's point of view have permitted to disentangle the specific interacting epitopes in each case. Based on these findings, 3D models of the interacting complexes have been proposed.
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Affiliation(s)
- Maria Pia Lenza
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Iker Oyenarte
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Tammo Diercks
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Jon Imanol Quintana
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Ana Gimeno
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Helena Coelho
- UCIBIOREQUIMTEDepartamento de QuímicaFaculdade de Ciências e TecnologiaUniversidade NOVA de Lisboa2829-516CaparicaPortugal
| | - Ana Diniz
- UCIBIOREQUIMTEDepartamento de QuímicaFaculdade de Ciências e TecnologiaUniversidade NOVA de Lisboa2829-516CaparicaPortugal
| | - Francesca Peccati
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Sandra Delgado
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Alexandre Bosch
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Mikel Valle
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Oscar Millet
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Nicola G. A. Abrescia
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
- Ikerbasque, Basque Foundation for Science48013BilbaoSpain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd)Instituto de Salud Carlos IIIMadridSpain
| | - Asís Palazón
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
- Ikerbasque, Basque Foundation for Science48013BilbaoSpain
| | - Filipa Marcelo
- UCIBIOREQUIMTEDepartamento de QuímicaFaculdade de Ciências e TecnologiaUniversidade NOVA de Lisboa2829-516CaparicaPortugal
| | - Gonzalo Jiménez‐Osés
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - Jesús Jiménez‐Barbero
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
- Ikerbasque, Basque Foundation for Science48013BilbaoSpain
- Department of Organic Chemistry IIUniversity of the Basque CountryUPV/EHU48940LeioaSpain
| | - Ana Ardá
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
| | - June Ereño‐Orbea
- CIC bioGUNEBasque Research and Technology AllianceBRTABizkaia Technology Park48162DerioSpain
- Ikerbasque, Basque Foundation for Science48013BilbaoSpain
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11
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Lenza MP, Oyenarte I, Diercks T, Quintana JI, Gimeno A, Coelho H, Diniz A, Peccati F, Delgado S, Bosch A, Valle M, Millet O, Abrescia NGA, Palazón A, Marcelo F, Jiménez‐Osés G, Jiménez‐Barbero J, Ardá A, Ereño‐Orbea J. Structural Characterization of N‐Linked Glycans in the Receptor Binding Domain of the SARS‐CoV‐2 Spike Protein and their Interactions with Human Lectins. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202011015] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Maria Pia Lenza
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Iker Oyenarte
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Tammo Diercks
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Jon Imanol Quintana
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Ana Gimeno
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Helena Coelho
- UCIBIO REQUIMTE Departamento de Química Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Caparica Portugal
| | - Ana Diniz
- UCIBIO REQUIMTE Departamento de Química Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Caparica Portugal
| | - Francesca Peccati
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Sandra Delgado
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Alexandre Bosch
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Mikel Valle
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Oscar Millet
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Nicola G. A. Abrescia
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
- Ikerbasque, Basque Foundation for Science 48013 Bilbao Spain
- Centro de Investigación Biomédica en Red de Enfermedades Hepáticas y Digestivas (CIBERehd) Instituto de Salud Carlos III Madrid Spain
| | - Asís Palazón
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
- Ikerbasque, Basque Foundation for Science 48013 Bilbao Spain
| | - Filipa Marcelo
- UCIBIO REQUIMTE Departamento de Química Faculdade de Ciências e Tecnologia Universidade NOVA de Lisboa 2829-516 Caparica Portugal
| | - Gonzalo Jiménez‐Osés
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - Jesús Jiménez‐Barbero
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
- Ikerbasque, Basque Foundation for Science 48013 Bilbao Spain
- Department of Organic Chemistry II University of the Basque Country UPV/EHU 48940 Leioa Spain
| | - Ana Ardá
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
| | - June Ereño‐Orbea
- CIC bioGUNE Basque Research and Technology Alliance BRTA Bizkaia Technology Park 48162 Derio Spain
- Ikerbasque, Basque Foundation for Science 48013 Bilbao Spain
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12
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Nelson L, Iannaccone S, Forrest D, Valle M, Klingman E, Castro D. SMA – THERAPY. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.271] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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13
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Carboni F, Marandino F, Valle M. Uncommon cause of acute abdomen in adult patient. Acta Gastroenterol Belg 2020; 83:500. [PMID: 33094606] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Affiliation(s)
- F Carboni
- Department of Digestive Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - F Marandino
- Department of Pathology, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - M Valle
- Department of Digestive Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy
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14
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Rosenthal VD, Bat-Erdene I, Gupta D, Belkebir S, Rajhans P, Zand F, Myatra SN, Afeef M, Tanzi VL, Muralidharan S, Gurskis V, Al-Abdely HM, El-Kholy A, AlKhawaja SAA, Sen S, Mehta Y, Rai V, Hung NV, Sayed AF, Guerrero-Toapanta FM, Elahi N, Morfin-Otero MDR, Somabutr S, De-Carvalho BM, Magdarao MS, Velinova VA, Quesada-Mora AM, Anguseva T, Ikram A, Aguilar-de-Moros D, Duszynska W, Mejia N, Horhat FG, Belskiy V, Mioljevic V, Di-Silvestre G, Furova K, Gamar-Elanbya MO, Gupta U, Abidi K, Raka L, Guo X, Luque-Torres MT, Jayatilleke K, Ben-Jaballah N, Gikas A, Sandoval-Castillo HR, Trotter A, Valderrama-Beltrán SL, Leblebicioglu H, Riera F, López M, Maurizi D, Desse J, Pérez I, Silva G, Chaparro G, Golschmid D, Cabrera R, Montanini A, Bianchi A, Vimercati J, Rodríguez-del-Valle M, Domínguez C, Saul P, Chediack V, Piastrelini M, Cardena L, Ramasco L, Olivieri M, Gallardo P, Juarez P, Brito M, Botta P, Alvarez G, Benchetrit G, Caridi M, Stagnaro J, Bourlot I, García M, Arregui N, Saeed N, Abdul-Aziz S, ALSayegh S, Humood M, Mohamed-Ali K, Swar S, Magray T, Aguiar-Portela T, Sugette-de-Aguiar T, Serpa-Maia F, Fernandes-Alves-de-Lima L, Teixeira-Josino L, Sampaio-Bezerra M, Furtado-Maia R, Romário-Mendes A, Alves-De-Oliveira A, Vasconcelos-Carneiro A, Anjos-Lima JD, Pinto-Coelho K, Maciel-Canuto M, Rocha-Batista M, Moreira T, Rodrigues-Amarilo N, Lima-de-Barros T, Guimarães KA, Batista C, Santos C, de-Lima-Silva F, Santos-Mota E, Karla L, Ferreira-de-Souza M, Luzia N, de-Oliveira S, Takeda C, Azevedo-Ferreira-Lima D, Faheina J, Coelho-Oliveira L, do-Nascimento S, Machado-Silva V, Bento-Ferreira, Olszewski J, Tenorio M, Silva-Lemos A, Ramos-Feijó C, Cardoso D, Correa-Barbosa M, Assunção-Ponte G, Faheina J, da-Silva-Escudero D, Servolo-Medeiros E, Andrade-Oliveira-Reis M, Kostadinov E, Dicheva V, Petrov M, Guo C, Yu H, Liu T, Song G, Wang C, Cañas-Giraldo L, Marin-Tobar D, Trujillo-Ramirez E, Andrea-Rios P, Álvarez-Moreno C, Linares C, González-Rubio P, Ariza-Ayala B, Gamba-Moreno L, Gualtero-Trujill S, Segura-Sarmiento S, Rodriguez-Pena J, Ortega R, Olarte N, Pardo-Lopez Y, Luis Marino Otela-Baicue A, Vargas-Garcia A, Roncancio E, Gomez-Nieto K, Espinosa-Valencia M, Barahona-Guzman N, Avila-Acosta C, Raigoza-Martinez W, Villamil-Gomez W, Chapeta-Parada E, Mindiola-Rochel A, Corchuelo-Martinez A, Martinez A, Lagares-Guzman A, Rodriguez-Ferrer M, Yepes-Gomez D, Muñoz-Gutierrez G, Arguello-Ruiz A, Zuniga-Chavarria M, Maroto-Vargas L, Valverde-Hernández M, Solano-Chinchilla A, Calvo-Hernandez I, Chavarria-Ugalde O, Tolari G, Rojas-Fermin R, Diaz-Rodriguez C, Huascar S, Ortiz M, Bovera M, Alquinga N, Santacruz G, Jara E, Delgado V, Salgado-Yepez E, Valencia F, Pelaez C, Gonzalez-Flores H, Coello-Gordon E, Picoita F, Arboleda M, Garcia M, Velez J, Valle M, Unigarro L, Figueroa V, Marin K, Caballero-Narvaez H, Bayani V, Ahmed S, Alansary A, Hassan A, Abdel-Halim M, El-Fattah M, Abdelaziz-Yousef R, Hala A, Abdelhady K, Ahmed-Fouad H, Mounir-Agha H, Hamza H, Salah Z, Abdel-Aziz D, Ibrahim S, Helal A, AbdelMassih A, Mahmoud AR, Elawady B, El-sherif R, Fattah-Radwan Y, Abdel-Mawla T, Kamal-Elden N, Kartsonaki M, Rivera D, Mandal S, Mukherjee S, Navaneet P, Padmini B, Sorabjee J, Sakle A, Potdar M, Mane D, Sale H, Abdul-Gaffar M, Kazi M, Chabukswar S, Anju M, Gaikwad D, Harshe A, Blessymole S, Nair P, Khanna D, Chacko F, Rajalakshmi A, Mubarak A, Kharbanda M, Kumar S, Mathur P, Saranya S, Abubakar F, Sampat S, Raut V, Biswas S, Kelkar R, Divatia J, Chakravarthy M, Gokul B, Sukanya R, Pushparaj L, Thejasvini A, Rangaswamy S, Saini N, Bhattacharya C, Das S, Sanyal S, Chaudhury B, Rodrigues C, Khanna G, Dwivedy A, Binu S, Shetty S, Eappen J, Valsa T, Sriram A, Todi S, Bhattacharyya M, Bhakta A, Ramachandran B, Krupanandan R, Sahoo P, Mohanty N, Sahu S, Misra S, Ray B, Pattnaik S, Pillai H, Warrier A, Ranganathan L, Mani A, Rajagopal S, Abraham B, Venkatraman R, Ramakrishnan N, Devaprasad D, Siva K, Divekar D, Satish Kavathekar M, Suryawanshi M, Poojary A, Sheeba J, Patil P, Kukreja S, Varma K, Narayanan S, Sohanlal T, Agarwal A, Agarwal M, Nadimpalli G, Bhamare S, Thorat S, Sarda O, Nadimpalli P, Nirkhiwale S, Gehlot G, Bhattacharya S, Pandya N, Raphel A, Zala D, Mishra S, Patel M, Aggarwal D, Jawadwal B, Pawar N, Kardekar S, Manked A, Tamboli A, Manked A, Khety Z, Singhal T, Shah S, Kothari V, Naik R, Narain R, Sengupta S, Karmakar A, Mishra S, Pati B, Kantroo V, Kansal S, Modi N, Chawla R, Chawla A, Roy I, Mukherjee S, Bej M, Mukherjee P, Baidya S, Durell A, Vadi S, Saseedharan S, Anant P, Edwin J, Sen N, Sandhu K, Pandya N, Sharma S, Sengupta S, Palaniswamy V, Sharma P, Selvaraj M, Saurabh L, Agarwal M, Punia D, Soni D, Misra R, Harsvardhan R, Azim A, Kambam C, Garg A, Ekta S, Lakhe M, Sharma C, Singh G, Kaur A, Singhal S, Chhabra K, Ramakrishnan G, Kamboj H, Pillai S, Rani P, Singla D, Sanaei A, Maghsudi B, Sabetian G, Masjedi M, Shafiee E, Nikandish R, Paydar S, Khalili H, Moradi A, Sadeghi P, Bolandparvaz S, Mubarak S, Makhlouf M, Awwad M, Ayyad O, Shaweesh A, Khader M, Alghazawi A, Hussien N, Alruzzieh M, Mohamed Y, ALazhary M, Abdul Aziz O, Alazmi M, Mendoza J, De Vera P, Rillorta A, de Guzman M, Girvan M, Torres M, Alzahrani N, Alfaraj S, Gopal U, Manuel M, Alshehri R, Lessing L, Alzoman H, Abdrahiem J, Adballah H, Thankachan J, Gomaa H, Asad T, AL-Alawi M, Al-Abdullah N, Demaisip N, Laungayan-Cortez E, Cabato A, Gonzales J, Al Raey M, Al-Darani S, Aziz M, Al-Manea B, Samy E, AlDalaton M, Alaliany M, Alabdely H, Helali N, Sindayen G, Malificio A, Al-Dossari H, Kelany A, Algethami A, Mohamed D, Yanne L, Tan A, Babu S, Abduljabbar S, Al-Zaydani M, Ahmed H, Al Jarie A, Al-Qathani A, Al-Alkami H, AlDalaton M, Alih S, Alaliany M, Gasmin-Aromin R, Balon-Ubalde E, Diab H, Kader N, Hassan-Assiry I, Kelany A, Albeladi E, Aboushoushah S, Qushmaq N, Fernandez J, Hussain W, Rajavel R, Bukhari S, Rushdi H, Turkistani A, Mushtaq J, Bohlega E, Simon S, Damlig E, Elsherbini S, Abraham S, Kaid E, Al-Attas A, Hawsawi G, Hussein B, Esam B, Caminade Y, Santos A, Abdulwahab M, Aldossary A, Al-Suliman S, AlTalib A, Albaghly N, HaqlreMia M, Kaid E, Altowerqi R, Ghalilah K, Alradady M, Al-Qatri A, Chaouali M, Shyrine E, Philipose J, Raees M, AbdulKhalik N, Madco M, Acostan C, Safwat R, Halwani M, Abdul-Aal N, Thomas A, Abdulatif S, Ali-Karrar M, Al-Gosn N, Al-Hindi A, Jaha R, AlQahtani S, Ayugat E, Al-Hussain M, Aldossary A, Al-Suliman S, Al-Talib A, Albaghly N, Haqlre-Mia M, Briones S, Krishnan R, Tabassum K, Alharbi L, Madani A, Al-Hindi A, Al-Gethamy M, Alamri D, Spahija G, Gashi A, Kurian A, George S, Mohamed A, Ramapurath R, Varghese S, Abdo N, Foda-Salama M, Al-Mousa H, Omar A, Salama M, Toleb M, Khamis S, Kanj S, Zahreddine N, Kanafani Z, Kardas T, Ahmadieh R, Hammoud Z, Zeid I, Al-Souheil A, Ayash H, Mahfouz T, Kondratas T, Grinkeviciute D, Kevalas R, Dagys A, Mitrev Z, Bogoevska-Miteva Z, Jankovska K, Guroska S, Petrovska M, Popovska K, Ng C, Hoon Y, Hasan YM, Othman-Jailani M, Hadi-Jamaluddin M, Othman A, Zainol H, Wan-Yusoff W, Gan C, Lum L, Ling C, Aziz F, Zhazali R, Abud-Wahab M, Cheng T, Elghuwael I, Wan-Mat W, Abd-Rahman R, Perez-Gomez H, Kasten-Monges M, Esparza-Ahumada S, Rodriguez-Noriega E, Gonzalez-Diaz E, Mayoral-Pardo D, Cerero-Gudino A, Altuzar-Figueroa M, Perez-Cruz J, Escobar-Vazquez M, Aragon D, Coronado-Magana H, Mijangos-Mendez J, Corona-Jimenez F, Aguirre-Avalos G, Lopez-Mateos A, Martinez-Marroquin M, Montell-Garcia M, Martinez-Martinez A, Leon-Sanchez E, Gomez-Flores G, Ramirez M, Gomez M, Lozano M, Mercado V, Zamudio-Lugo I, Gomez-Gonzalez C, Miranda-Novales M, Villegas-Mota I, Reyes-Garcia C, Ramirez-Morales M, Sanchez-Rivas M, Cureno-Diaz M, Matias-Tellez B, Gonzalez-Martinez J, Juarez-Vargas R, Pastor-Salinas O, Gutierrez-Munoz V, Conde-Mercado J, Bruno-Carrasco G, Manrique M, Monroy-Colin V, Cruz-Rivera Z, Rodriguez-Pacheco J, Cruz N, Hernandez-Chena B, Guido-Ramirez O, Arteaga-Troncoso G, Guerra-Infante F, Lopez-Hurtado M, Caleco JD, Leyva-Medellin E, Salamanca-Meneses A, Cosio-Moran C, Ruiz-Rendon R, Aguilar-Angel L, Sanchez-Vargas M, Mares-Morales R, Fernandez-Alvarez L, Castillo-Cruz B, Gonzalez-Ma M, Zavala-Ramír M, Rivera-Reyna L, del-Moral-Rossete L, Lopez-Rubio C, Valadez-de-Alba M, Bat-Erdene A, Chuluunchimeg K, Baatar O, Batkhuu B, Ariyasuren Z, Bayasgalan G, Baigalmaa S, Uyanga T, Suvderdene P, Enkhtsetseg D, Suvd-Erdene D, Chimedtseye E, Bilguun G, Tuvshinbayar M, Dorj M, Khajidmaa T, Batjargal G, Naranpurev M, Bat-Erdene A, Bolormaa T, Battsetseg T, Batsuren C, Batsaikhan N, Tsolmon B, Saranbaatar A, Natsagnyam P, Nyamdawa O, Madani N, Abouqal R, Zeggwagh A, Berechid K, Dendane T, Koirala A, Giri R, Sainju S, Acharya S, Paul N, Parveen A, Raza A, Nizamuddin S, Sultan F, Imran X, Sajjad R, Khan M, Sana F, Tayyab N, Ahmed A, Zaman G, Khan I, Khurram F, Hussain A, Zahra F, Imtiaz A, Daud N, Sarwar M, Roop Z, Yusuf S, Hanif F, Shumaila X, Zeb J, Ali S, Demas S, Ariff S, Riaz A, Hussain A, Kanaan A, Jeetawi R, Castaño E, Moreno-Castillo L, García-Mayorca E, Prudencio-Leon W, Vivas-Pardo A, Changano-Rodriguez M, Castillo-Bravo L, Aibar-Yaranga K, Marquez-Mondalgo V, Mueras-Quevedo J, Meza-Borja C, Flor J, Fernandez-Camacho Y, Banda-Flores C, Pichilingue-Chagray J, Castaneda-Sabogal A, Caoili J, Mariano M, Maglente R, Santos S, de-Guzman G, Mendoza M, Javellana O, Tajanlangit A, Tapang A, Sg-Buenaflor M, Labro E, Carma R, Dy A, Fortin J, Navoa-Ng J, Cesar J, Bonifacio B, Llames M, Gata H, Tamayo A, Calupit H, Catcho V, Bergosa L, Abuy M, Barteczko-Grajek B, Rojek S, Szczesny A, Domanska M, Lipinska G, Jaroslaw J, Wieczoreka A, Szczykutowicza A, Gawor M, Piwoda M, Rydz-Lutrzykowska J, Grudzinska M, Kolat-Brodecka P, Smiechowicz K, Tamowicz B, Mikstacki A, Grams A, Sobczynski P, Nowicka M, Kretov V, Shalapuda V, Molkov A, Puzanov S, Utkin I, Tchekulaev A, Tulupova V, Vasiljevic S, Nikolic L, Ristic G, Eremija J, Kojovic J, Lekic D, Simic A, Hlinkova S, Lesnakova A, Kadankunnel S, Abdo-Ali M, Pimathai R, Wanitanukool S, Supa N, Prasan P, Luxsuwong M, Khuenkaew Y, Lamngamsupha J, Siriyakorn N, Prasanthai V, Apisarnthanarak A, Borgi A, Bouziri A, Cabadak H, Tuncer G, Bulut C, Hatipoglu C, Sebnem F, Demiroz A, Kaya A, Ersoz G, Kuyucu N, Karacorlu S, Oncul O, Gorenek L, Erdem H, Yildizdas D, Horoz O, Guclu E, Kaya G, Karabay O, Altindis M, Oztoprak N, Sahip Y, Uzun C, Erben N, Usluer G, Ozgunes I, Ozcelik M, Ceyda B, Oral M, Unal N, Cigdem Y, Bayar M, Bermede O, Saygili S, Yesiler I, Memikoglu O, Tekin R, Oncul A, Gunduz A, Ozdemir D, Geyik M, Erdogan S, Aygun C, Dilek A, Esen S, Turgut H, Sungurtekin H, Ugurcan D, Yarar V, Bilir Y, Bayram N, Devrim I, Agin H, Ceylan G, Yasar N, Oruc Y, Ramazanoglu A, Turhan O, Cengiz M, Yalcin A, Dursun O, Gunasan P, Kaya S, Senol G, Kocagoz A, Al-Rahma H, Annamma P, El-Houfi A, Vidal H, Perez F, D-Empaire G, Ruiz Y, Hernandez D, Aponte D, Salinas E, Vidal H, Navarrete N, Vargas R, Sanchez E, Ngo Quy C, Thu T, Nguyet L, Hang P, Hang T, Hanh T, Anh D. International Nosocomial Infection Control Consortium (INICC) report, data summary of 45 countries for 2012-2017: Device-associated module. Am J Infect Control 2020; 48:423-432. [PMID: 31676155 DOI: 10.1016/j.ajic.2019.08.023] [Citation(s) in RCA: 61] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 08/20/2019] [Accepted: 08/21/2019] [Indexed: 12/18/2022]
Abstract
BACKGROUND We report the results of International Nosocomial Infection Control Consortium (INICC) surveillance study from January 2012 to December 2017 in 523 intensive care units (ICUs) in 45 countries from Latin America, Europe, Eastern Mediterranean, Southeast Asia, and Western Pacific. METHODS During the 6-year study period, prospective data from 532,483 ICU patients hospitalized in 242 hospitals, for an aggregate of 2,197,304 patient days, were collected through the INICC Surveillance Online System (ISOS). The Centers for Disease Control and Prevention-National Healthcare Safety Network (CDC-NHSN) definitions for device-associated health care-associated infection (DA-HAI) were applied. RESULTS Although device use in INICC ICUs was similar to that reported from CDC-NHSN ICUs, DA-HAI rates were higher in the INICC ICUs: in the medical-surgical ICUs, the pooled central line-associated bloodstream infection rate was higher (5.05 vs 0.8 per 1,000 central line-days); the ventilator-associated pneumonia rate was also higher (14.1 vs 0.9 per 1,000 ventilator-days,), as well as the rate of catheter-associated urinary tract infection (5.1 vs 1.7 per 1,000 catheter-days). From blood cultures samples, frequencies of resistance, such as of Pseudomonas aeruginosa to piperacillin-tazobactam (33.0% vs 18.3%), were also higher. CONCLUSIONS Despite a significant trend toward the reduction in INICC ICUs, DA-HAI rates are still much higher compared with CDC-NHSN's ICUs representing the developed world. It is INICC's main goal to provide basic and cost-effective resources, through the INICC Surveillance Online System to tackle the burden of DA-HAIs effectively.
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Carboni F, Federici O, Giofre' M, Zazza S, Valle M. Empty pelvis syndrome: the use of breast prosthesis in the prevention of complications. Colorectal Dis 2019; 21:1321-1325. [PMID: 31230404 DOI: 10.1111/codi.14737] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 06/03/2019] [Indexed: 12/16/2022]
Abstract
AIM Empty pelvis syndrome and radiation-induced bowel injury are two major clinical issues resulting from the pelvic dead space after pelvic exenteration (PE). In order to avoid these complications, different methods of pelvic floor reconstruction have been proposed. We report our experience on the use of breast prosthesis. METHOD Fifty-three patients who underwent PE and three who underwent palliative surgery with silicone breast prosthesis placement were included. RESULTS Forty-seven posterior PE, six total PE and three palliative procedures were identified. Sphincter preservation was feasible in 34 patients (62.3%). There were no deaths. Overall morbidity was 37.5%. There were no complications such as sepsis or obstruction related to the prosthesis. Adjuvant radiotherapy was delivered in 16 cases (30.1%) without any side-effects. Reconstruction of intestinal continuity was possible in 12 patients (36.3%) with sphincter preservation and the prosthesis allowed a prompt identification of the rectal stump. CONCLUSION Breast prosthesis placement is a simple and safe method to minimize complications resulting from empty pelvis syndrome and can be adopted to exclude bowel loops from the radiation field. Reconstruction of intestinal continuity after resection is also simplified.
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Affiliation(s)
- F Carboni
- Department of Digestive Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - O Federici
- Department of Digestive Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - M Giofre'
- Department of Digestive Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - S Zazza
- Department of Digestive Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - M Valle
- Department of Digestive Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy
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Cuesta R, Yuste-Calvo C, Gil-Cartón D, Sánchez F, Ponz F, Valle M. Structure of Turnip mosaic virus and its viral-like particles. Sci Rep 2019; 9:15396. [PMID: 31659175 PMCID: PMC6817885 DOI: 10.1038/s41598-019-51823-4] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [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: 07/05/2019] [Accepted: 10/07/2019] [Indexed: 01/05/2023] Open
Abstract
Turnip mosaic virus (TuMV), a potyvirus, is a flexible filamentous plant virus that displays a helical arrangement of coat protein copies (CPs) bound to the ssRNA genome. TuMV is a bona fide representative of the Potyvirus genus, one of most abundant groups of plant viruses, which displays a very wide host range. We have studied by cryoEM the structure of TuMV virions and its viral-like particles (VLPs) to explore the role of the interactions between proteins and RNA in the assembly of the virions. The results show that the CP-RNA interaction is needed for the correct orientation of the CP N-terminal arm, a region that plays as a molecular staple between CP subunits in the fully assembled virion.
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Affiliation(s)
- Rebeca Cuesta
- Molecular Recognition and Host-pathogen Interactions Programme, CIC bioGUNE, Bizkaia Technology Park, 48160, Derio, Spain
| | - Carmen Yuste-Calvo
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (CBGP, UPM-INIA), Campus Montegancedo, 28223, Madrid, Spain
| | - David Gil-Cartón
- Molecular Recognition and Host-pathogen Interactions Programme, CIC bioGUNE, Bizkaia Technology Park, 48160, Derio, Spain
| | - Flora Sánchez
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (CBGP, UPM-INIA), Campus Montegancedo, 28223, Madrid, Spain
| | - Fernando Ponz
- Centro de Biotecnología y Genómica de Plantas, Universidad Politécnica de Madrid - Instituto Nacional de Investigación y Tecnología Agraria y Alimentaria (CBGP, UPM-INIA), Campus Montegancedo, 28223, Madrid, Spain
| | - Mikel Valle
- Molecular Recognition and Host-pathogen Interactions Programme, CIC bioGUNE, Bizkaia Technology Park, 48160, Derio, Spain.
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Carboni F, Federici O, Valle M. Response to Lee et al. 'Addressing the empty pelvic syndrome following total pelvic exenteration: does mesh reconstruction help?'. Colorectal Dis 2019; 21:490. [PMID: 30724458 DOI: 10.1111/codi.14577] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2018] [Accepted: 01/21/2019] [Indexed: 02/08/2023]
Affiliation(s)
- F Carboni
- Department of Digestive Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - O Federici
- Department of Digestive Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy
| | - M Valle
- Department of Digestive Surgery, IRCCS Regina Elena National Cancer Institute, Rome, Italy
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Nelson L, Valle M, Forrest D, Klingman E, Ramm T, Farrow-Gillespie A, Spain T, Castro D, Iannaccone S. SMA THERAPIES I. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Roque M, Valle M, Sampaio M, Geber S. Does freeze-all policy affect IVF outcome in poor ovarian responders? Ultrasound Obstet Gynecol 2018; 52:530-534. [PMID: 29280508 DOI: 10.1002/uog.19000] [Citation(s) in RCA: 15] [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] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 12/12/2017] [Accepted: 12/15/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To evaluate whether the freeze-all strategy affects in-vitro fertilization (IVF) outcome in poor ovarian responders (POR) defined according to the Bologna criteria. METHOD This was a retrospective cohort study of patients undergoing IVF treatment between January 2012 and December 2016 at a single center. A total of 433 POR (as defined by the Bologna criteria) fulfilled criteria and were included in the study; of these, 277 patients underwent fresh embryo transfer (ET) and 156 followed the freeze-all policy. All patients underwent controlled ovarian stimulation (COS) following a gonadotropin-releasing hormone antagonist protocol, and cleavage-stage ET. Main outcome measure was ongoing pregnancy rate. Secondary outcomes included implantation and clinical pregnancy rates. The freeze-all strategy was implemented when the progesterone serum level was > 1.5 ng/mL or the endometrium was < 7 mm on the trigger day, or as per patient preference. Patients with previous failed fresh ET also underwent fresh ET or freeze-all strategy considering the indications mentioned above. RESULTS Mean maternal age in the freeze-all group was 39.5 ± 3.6 years and in the fresh ET group was 39.7 ± 3.8 years (P = 0.54). Mean number of embryos transferred (nET) was 1.53 ± 0.6 and 1.60 ± 0.6 (P = 0.12) in the freeze-all and fresh ET groups, respectively. Ongoing pregnancy rate did not differ significantly between the freeze-all and fresh ET groups (9.6% vs 10.1%, respectively; relative risk (RR), 0.95; 95% CI, 0.52-1.73), nor did the clinical pregnancy rate (14.1% vs 13.7%, respectively; RR, 1.03; 95% CI, 0.63-1.67). Implantation rate was 9.6% and 9.8% (P = 0.82) in the freeze-all and fresh ET groups, respectively. Logistic regression analysis (including maternal age, antral follicle count, number of retrieved and mature oocytes, nET, and fresh ET vs freeze-all strategy) indicated that maternal age (P < 0.001) and nET (P = 0.039) were the only independent variables associated with ongoing pregnancy rate. CONCLUSIONS The freeze-all strategy, compared with fresh ET, had no impact on IVF outcomes in POR patients as defined according to the Bologna criteria. Multicenter studies including large numbers of patients should be carried out to confirm the results of this study and reach conclusions about the potential benefits of the freeze-all policy for poor responders. Copyright © 2017 ISUOG. Published by John Wiley & Sons Ltd.
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Affiliation(s)
- M Roque
- ORIGEN - Center for Reproductive Medicine, Rio de Janeiro, Brazil
- Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - M Valle
- ORIGEN - Center for Reproductive Medicine, Rio de Janeiro, Brazil
| | - M Sampaio
- ORIGEN - Center for Reproductive Medicine, Belo Horizonte, Brazil
| | - S Geber
- Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- ORIGEN - Center for Reproductive Medicine, Belo Horizonte, Brazil
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Pagès N, Talavera S, Verdún M, Pujol N, Valle M, Bensaid A, Pujols J. Schmallenberg virus detection in Culicoides biting midges in Spain: First laboratory evidence for highly efficient infection of Culicoides of the Obsoletus complex and Culicoides imicola. Transbound Emerg Dis 2018; 65:e1-e6. [PMID: 28474491 DOI: 10.1111/tbed.12653] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Indexed: 11/30/2022]
Abstract
Since Schmallenberg disease was discovered in 2011, the disease rapidly spread across Europe. Culicoides biting midges have been implicated as putative Schmallenberg vectors in Europe. The detection of Schmallenberg virus (SBV) in field collected Culicoides was evaluated through retrospective (2011-2012) collections and captures performed in 2013. This study represents the first detection of SBV in field collected Culicoides in Spain. Infectious midges were detected at the foothills of Pyrenees, Aramunt, in the summer 2012. All the specimens infected with Schmallenberg were of the species Culicoides obsoletus s.s. confirming its putative vector status in Spain. Experimental infection on field collected Culicoides provided evidence of atypical high efficiency for SBV vector infection and transmission potential in local populations of Culicoides imicola and in Culicoides of the Obsoletus complex. However, captured individuals of C. imicola were more susceptible to SBV infection than C. obsoletus s.l. (p < .001), with an infection ratio of 0.94 and 0.63, respectively. In contrast, a Culicoides nubeculosus colony appeared to be refractory to SBV infection.
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Affiliation(s)
- N Pagès
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - S Talavera
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - M Verdún
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - N Pujol
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - M Valle
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - A Bensaid
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
| | - J Pujols
- IRTA, Centre de Recerca en Sanitat Animal (CReSA, IRTA-UAB), Campus de la Universitat Autònoma de Barcelona, Bellaterra, Spain
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Gómez-Guzmán E, Cañete MD, Valle-Martos R, Cañete R, Valle M, Jiménez-Reina L, Caballero-Villarraso J. Short-Term Evaluation of Left Ventricular Mass and Function in Children With Growth Hormone Deficiency After Replacement Treatment. Front Pediatr 2018; 6:174. [PMID: 29971224 PMCID: PMC6018080 DOI: 10.3389/fped.2018.00174] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Accepted: 05/29/2018] [Indexed: 11/17/2022] Open
Abstract
Background: Our study was designed to assess the effects of GHD on nutritional and metabolic parameters, brain natriuretic peptide (BNP) levels, and left ventricular mass (LVM) in prepubertal children and after short-term GH replacement therapy. Materials and Methods: This prospective study enrolled 81 children. We compared 40 GHD children (16 males and 24 females) to 41 healthy children (control group) (18 males and 23 females). All subjects were at Tanner Stage I (aged 7-11 years). At the baseline, a blood sample was drawn and echocardiographic images were obtained. These tests were repeated on the GHD subjects after 6 months of GH replacement therapy. Body surface, weight, size, blood pressure, heart rate, glucose, insulin, HOMA-IR, HOMA-β, QUICKI, cholesterol, HDLc, LDLc, triglycerides, IGF1, and IGFBP3 were measured. Indexed LVM, diastolic and systolic diameter (dD-sD), diastolic and systolic LV function, isovolumic relaxation time, right ventricle function, and BNP levels were obtained through echocardiography. These parameters were correlated to growth factors. Data were analyzed using Student's t-test or U-Mann-Whitney-test and Pearson's correlation, considering p < 0.05 to be significant. Results: Indexed LVM was smaller in GHD patients than in controls, whereas diastolic and systolic functions, BNP, metabolic, and nutritional profiles were similar. After treatment, nutritional and metabolic profiles significantly improved, though diastolic and systolic functions did not seem to have changed. There was a significant increase in LVM. Indexed LVM was similar to that of controls. Significant correlations were obtained between LVM-IGF1 and sD-IGFBP3. Conclusions: GHD in childhood is associated with a lower indexed LVM. In the short-term, GH increases the indexed LVM, while maintaining normal systolic and diastolic functions, BNP, and an improved lipid profile.
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Affiliation(s)
- E Gómez-Guzmán
- Cardiology Unit, Hospital Reina Sofía de Córdoba, Cordova, Spain.,Instituto Maimonides de Investigación Biomédica de Cordoba, Cordova, Spain
| | - M D Cañete
- Instituto Maimonides de Investigación Biomédica de Cordoba, Cordova, Spain
| | | | - R Cañete
- Cardiology Unit, Hospital Reina Sofía de Córdoba, Cordova, Spain.,Instituto Maimonides de Investigación Biomédica de Cordoba, Cordova, Spain
| | - M Valle
- Instituto Maimonides de Investigación Biomédica de Cordoba, Cordova, Spain.,Clinical Analysis Services, Hospital Valle De Los Pedroches, Cordova, Spain
| | - L Jiménez-Reina
- Instituto Maimonides de Investigación Biomédica de Cordoba, Cordova, Spain.,Facultad de Medicina y Enfermería, Universidad de Córdoba, Cordova, Spain
| | - J Caballero-Villarraso
- Instituto Maimonides de Investigación Biomédica de Cordoba, Cordova, Spain.,Clinical Analysis Services, Hospital Valle De Los Pedroches, Cordova, Spain
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Abstract
Our understanding of the viral world changed just after the first structures of icosahedral viral particles were unveiled. The structural similarities between capsid proteins of distant viral groups were not anticipated, and the findings suggested the existence of common ancestors for viruses with different host range, genomic structure and multiplication strategies. This way, diverse viruses with icosahedral particles can now be grouped based on the structural homology between their capsid proteins. In the last years, the presence of conserved folds between viral proteins in non-icosahedral viruses has also emerged. Viral particles with radically different morphologies, ranging from naked and filamentous to enveloped and pleomorphic, have shown structural homology between the nucleoproteins that bind directly to their genomes. This chapter overviews recent findings regarding the similar structure found between nucleoproteins of eukaryotic ssRNA viruses. The structural homology includes the coat proteins from all known families of flexible filamentous plant viruses, a group with monopartite (+)ssRNA genomes. Their coat proteins share a core domain with nucleoproteins of previously unrelated families of enveloped viruses that have segmented (-)ssRNA genomes. This last group consists of mostly animals viruses, including influenza virus.
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Affiliation(s)
- Mikel Valle
- Molecular Recognition and Host-Pathogen Interactions, Center for Cooperative Research in Biosciences, CIC bioGUNE, Derio, Spain.
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Brustolin M, Talavera S, Nuñez A, Santamaría C, Rivas R, Pujol N, Valle M, Verdún M, Brun A, Pagès N, Busquets N. Rift Valley fever virus and European mosquitoes: vector competence of Culex pipiens and Stegomyia albopicta (= Aedes albopictus). Med Vet Entomol 2017; 31:365-372. [PMID: 28782121 DOI: 10.1111/mve.12254] [Citation(s) in RCA: 45] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 04/21/2017] [Accepted: 06/08/2017] [Indexed: 06/07/2023]
Abstract
Rift Valley fever (RVF) is a mosquito-borne disease caused by the Rift Valley fever virus (RVFV). Rift Valley fever affects a large number of species, including human, and has severe impact on public health and the economy, especially in African countries. The present study examined the vector competence of three different European mosquito species, Culex pipiens (Linnaeus, 1758) form molestus (Diptera: Culicidae), Culex pipiens hybrid form and Stegomyia albopicta (= Aedes albopictus) (Skuse, 1894) (Diptera: Culicidae). Mosquitoes were artificially fed with blood containing RVFV. Infection, disseminated infection and transmission efficiency were evaluated. This is the first study to assess the transmission efficiency of European mosquito species using a virulent RVFV strain. The virus disseminated in Cx. pipiens hybrid form and in S. albopicta. Moreover, infectious viral particles were isolated from saliva of both species, showing their RVFV transmission capacity. The presence of competent Cx. pipiens and S. albopicta in Spain indicates that an autochthonous outbreak of RVF may occur if the virus is introduced. These findings provide information that will help health authorities to set up efficient entomological surveillance and RVFV vector control programmes.
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Affiliation(s)
- M Brustolin
- IRTA, Centre de Recerca en Sanitat Animal, (CReSA, IRTA-UAB), Bellaterra, Spain
| | - S Talavera
- IRTA, Centre de Recerca en Sanitat Animal, (CReSA, IRTA-UAB), Bellaterra, Spain
| | - A Nuñez
- IRTA, Centre de Recerca en Sanitat Animal, (CReSA, IRTA-UAB), Bellaterra, Spain
| | - C Santamaría
- IRTA, Centre de Recerca en Sanitat Animal, (CReSA, IRTA-UAB), Bellaterra, Spain
| | - R Rivas
- IRTA, Centre de Recerca en Sanitat Animal, (CReSA, IRTA-UAB), Bellaterra, Spain
| | - N Pujol
- IRTA, Centre de Recerca en Sanitat Animal, (CReSA, IRTA-UAB), Bellaterra, Spain
| | - M Valle
- IRTA, Centre de Recerca en Sanitat Animal, (CReSA, IRTA-UAB), Bellaterra, Spain
| | - M Verdún
- IRTA, Centre de Recerca en Sanitat Animal, (CReSA, IRTA-UAB), Bellaterra, Spain
| | - A Brun
- Centro de Investigación en Sanidad Animal, Instituto Nacional de Investigación Agraria y Alimentaria (INIA-CISA), Valdeolmos, Madrid, Spain
| | - N Pagès
- IRTA, Centre de Recerca en Sanitat Animal, (CReSA, IRTA-UAB), Bellaterra, Spain
| | - N Busquets
- IRTA, Centre de Recerca en Sanitat Animal, (CReSA, IRTA-UAB), Bellaterra, Spain
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Artetxe I, Ugarte-Uribe B, Gil D, Valle M, Alonso A, García-Sáez AJ, Goñi FM. Does Ceramide Form Channels? The Ceramide-Induced Membrane Permeabilization Mechanism. Biophys J 2017; 113:860-868. [PMID: 28834722 DOI: 10.1016/j.bpj.2017.06.071] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 04/10/2017] [Accepted: 06/06/2017] [Indexed: 12/30/2022] Open
Abstract
Ceramide is a sphingolipid involved in several cellular processes, including apoptosis. It has been proposed that ceramide forms large and stable channels in the mitochondrial outer membrane that induce cell death through direct release of cytochrome c. However, this mechanism is still debated because the membrane permeabilizing activity of ceramide remains poorly understood. To determine whether the mechanism of ceramide-induced membrane leakage is consistent with the hypothesis of an apoptotic ceramide channel, we have used here assays of calcein release from liposomes. When assaying liposomes containing sphingomyelin and cholesterol, we observed an overall gradual phenomenon of contents release, together with some all-or-none leakage (at low ceramide concentrations or short times). The presence of channels in the bilayer should cause only an all-or-none leakage. When liposomes poor in sphingomyelin/cholesterol or mimicking the lipid composition of the mitochondrial outer membrane were tested, we did not detect any leakage. In consequence, the hypothesis of formation of large ceramide channels in the membrane is not consistent with our results. Instead we propose that the presence of ceramide in one of the membrane monolayers causes a surface area mismatch between both monolayers, which leads to vesicle collapse. The gradual phenomenon of calcein release would be due to a competition between two ceramide effects; namely, lateral segregation that facilitates permeabilization, and at longer times, trans-bilayer flip-flop that opposes asymmetric lateral segregation and causes a mismatch.
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Affiliation(s)
- Ibai Artetxe
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, Leioa, Spain
| | - Begoña Ugarte-Uribe
- Membrane Biophysics, Interfaculty Institute of Biochemistry, Eberhard Karls University Tübingen, Tübingen, Germany
| | - David Gil
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, Derio, Spain
| | - Mikel Valle
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, Derio, Spain
| | - Alicia Alonso
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, Leioa, Spain
| | - Ana J García-Sáez
- Membrane Biophysics, Interfaculty Institute of Biochemistry, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Félix M Goñi
- Biofisika Institute (CSIC, UPV/EHU) and Department of Biochemistry, University of the Basque Country, Leioa, Spain.
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25
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Zamora M, Méndez-López E, Agirrezabala X, Cuesta R, Lavín JL, Sánchez-Pina MA, Aranda MA, Valle M. Potyvirus virion structure shows conserved protein fold and RNA binding site in ssRNA viruses. Sci Adv 2017; 3:eaao2182. [PMID: 28948231 PMCID: PMC5606705 DOI: 10.1126/sciadv.aao2182] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2017] [Accepted: 08/18/2017] [Indexed: 05/16/2023]
Abstract
Potyviruses constitute the second largest genus of plant viruses and cause important economic losses in a large variety of crops; however, the atomic structure of their particles remains unknown. Infective potyvirus virions are long flexuous filaments where coat protein (CP) subunits assemble in helical mode bound to a monopartite positive-sense single-stranded RNA [(+)ssRNA] genome. We present the cryo-electron microscopy (cryoEM) structure of the potyvirus watermelon mosaic virus at a resolution of 4.0 Å. The atomic model shows a conserved fold for the CPs of flexible filamentous plant viruses, including a universally conserved RNA binding pocket, which is a potential target for antiviral compounds. This conserved fold of the CP is widely distributed in eukaryotic viruses and is also shared by nucleoproteins of enveloped viruses with segmented (-)ssRNA (negative-sense ssRNA) genomes, including influenza viruses.
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Affiliation(s)
- Miguel Zamora
- Molecular Recognition and Host-Pathogen Interactions, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160 Derio, Spain
| | - Eduardo Méndez-López
- Centro de Edafología y Biología Aplicada del Segura (CEBAS), Consejo Superior de Investigaciones Científicas (CSIC), Espinardo, 30100 Murcia, Spain
| | - Xabier Agirrezabala
- Molecular Recognition and Host-Pathogen Interactions, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160 Derio, Spain
| | - Rebeca Cuesta
- Molecular Recognition and Host-Pathogen Interactions, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160 Derio, Spain
| | - José L. Lavín
- Molecular Recognition and Host-Pathogen Interactions, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160 Derio, Spain
| | - M. Amelia Sánchez-Pina
- Centro de Edafología y Biología Aplicada del Segura (CEBAS), Consejo Superior de Investigaciones Científicas (CSIC), Espinardo, 30100 Murcia, Spain
| | - Miguel A. Aranda
- Centro de Edafología y Biología Aplicada del Segura (CEBAS), Consejo Superior de Investigaciones Científicas (CSIC), Espinardo, 30100 Murcia, Spain
| | - Mikel Valle
- Molecular Recognition and Host-Pathogen Interactions, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160 Derio, Spain
- Corresponding author.
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Monasterio BG, Alonso B, Sot J, García-Arribas AB, Gil-Cartón D, Valle M, Zurutuza A, Goñi FM. Coating Graphene Oxide with Lipid Bilayers Greatly Decreases Its Hemolytic Properties. Langmuir 2017; 33:8181-8191. [PMID: 28772075 DOI: 10.1021/acs.langmuir.7b01552] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Toxicity evaluation for the proper use of graphene oxide (GO) in biomedical applications involving intravenous injections is crucial, but the GO circulation time and blood interactions are largely unknown. It is thought that GO may cause physical disruption (hemolysis) of red blood cells. The aim of this work is to characterize the interaction of GO with model and cell membranes and use this knowledge to improve GO hemocompatibility. We have found that GO interacts with both neutral and negatively charged lipid membranes; binding is decreased beyond a certain concentration of negatively charged lipids and favored in high-salt buffers. After this binding occurs, some of the vesicles remain intact, while others are disrupted and spread over the GO surface. Neutral membrane vesicles tend to break down and extend over the GO, while vesicles with negatively charged membranes are mainly bound to the GO without disruption. GO also interacts with red blood cells and causes hemolysis; hemolysis is decreased when GO is previously coated with lipid membranes, particularly with pure phosphatidylcholine vesicles.
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Affiliation(s)
| | | | | | | | - David Gil-Cartón
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE , Derio 48160, Spain
| | - Mikel Valle
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE , Derio 48160, Spain
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27
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Agirrezabala X, Samatova E, Klimova M, Zamora M, Gil-Carton D, Rodnina MV, Valle M. Ribosome rearrangements at the onset of translational bypassing. Sci Adv 2017; 3:e1700147. [PMID: 28630923 PMCID: PMC5462505 DOI: 10.1126/sciadv.1700147] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
Bypassing is a recoding event that leads to the translation of two distal open reading frames into a single polypeptide chain. We present the structure of a translating ribosome stalled at the bypassing take-off site of gene 60 of bacteriophage T4. The nascent peptide in the exit tunnel anchors the P-site peptidyl-tRNAGly to the ribosome and locks an inactive conformation of the peptidyl transferase center (PTC). The mRNA forms a short dynamic hairpin in the decoding site. The ribosomal subunits adopt a rolling conformation in which the rotation of the small subunit around its long axis causes the opening of the A-site region. Together, PTC conformation and mRNA structure safeguard against premature termination and read-through of the stop codon and reconfigure the ribosome to a state poised for take-off and sliding along the noncoding mRNA gap.
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Affiliation(s)
- Xabier Agirrezabala
- Structural Biology Unit, CIC bioGUNE, 48160 Derio, Spain
- Corresponding author. (X.A.); (M.V.R.); (M.V.)
| | - Ekaterina Samatova
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Mariia Klimova
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
| | - Miguel Zamora
- Structural Biology Unit, CIC bioGUNE, 48160 Derio, Spain
| | | | - Marina V. Rodnina
- Department of Physical Biochemistry, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
- Corresponding author. (X.A.); (M.V.R.); (M.V.)
| | - Mikel Valle
- Structural Biology Unit, CIC bioGUNE, 48160 Derio, Spain
- Corresponding author. (X.A.); (M.V.R.); (M.V.)
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Abstract
Pyruvate carboxylase is a metabolic enzyme that fuels the tricarboxylic acid cycle with one of its intermediates and also participates in the first step of gluconeogenesis. This large enzyme is multifunctional, and each subunit contains two active sites that catalyze two consecutive reactions that lead to the carboxylation of pyruvate into oxaloacetate, and a binding site for acetyl-CoA, an allosteric regulator of the enzyme. Pyruvate carboxylase oligomers arrange in tetramers and covalently attached biotins mediate the transfer of carboxyl groups between distant active sites. In this chapter, some of the recent findings on pyruvate carboxylase functioning are presented, with special focus on the structural studies of the full length enzyme. The emerging picture reveals large movements of domains that even change the overall quaternary organization of pyruvate carboxylase tetramers during catalysis.
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Affiliation(s)
- Mikel Valle
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160, Derio, Spain.
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29
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Landajuela A, Hervás JH, Antón Z, Montes LR, Gil D, Valle M, Rodriguez JF, Goñi FM, Alonso A. Lipid Geometry and Bilayer Curvature Modulate LC3/GABARAP-Mediated Model Autophagosomal Elongation. Biophys J 2016; 110:411-422. [PMID: 26789764 DOI: 10.1016/j.bpj.2015.11.3524] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Revised: 11/14/2015] [Accepted: 11/30/2015] [Indexed: 11/29/2022] Open
Abstract
Autophagy, an important catabolic pathway involved in a broad spectrum of human diseases, implies the formation of double-membrane-bound structures called autophagosomes (AP), which engulf material to be degraded in lytic compartments. How APs form, especially how the membrane expands and eventually closes upon itself, is an area of intense research. Ubiquitin-like ATG8 has been related to both membrane expansion and membrane fusion, but the underlying molecular mechanisms are poorly understood. Here, we used two minimal reconstituted systems (enzymatic and chemical conjugation) to compare the ability of human ATG8 homologs (LC3, GABARAP, and GATE-16) to mediate membrane fusion. We found that both enzymatically and chemically lipidated forms of GATE-16 and GABARAP proteins promote extensive membrane tethering and fusion, whereas lipidated LC3 does so to a much lesser extent. Moreover, we characterize the GATE-16/GABARAP-mediated membrane fusion as a phenomenon of full membrane fusion, independently demonstrating vesicle aggregation, intervesicular lipid mixing, and intervesicular mixing of aqueous content, in the absence of vesicular content leakage. Multiple fusion events give rise to large vesicles, as seen by cryo-electron microscopy observations. We also show that both vesicle diameter and selected curvature-inducing lipids (cardiolipin, diacylglycerol, and lyso-phosphatidylcholine) can modulate the fusion process, smaller vesicle diameters and negative intrinsic curvature lipids (cardiolipin, diacylglycerol) facilitating fusion. These results strongly support the hypothesis of a highly bent structural fusion intermediate (stalk) during AP biogenesis and add to the growing body of evidence that identifies lipids as important regulators of autophagy.
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Affiliation(s)
- Ane Landajuela
- Unidad de Biofísica (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain
| | - Javier H Hervás
- Unidad de Biofísica (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain
| | - Zuriñe Antón
- Unidad de Biofísica (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain
| | - L Ruth Montes
- Unidad de Biofísica (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain
| | - David Gil
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, Derio, Spain
| | - Mikel Valle
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, Derio, Spain
| | - J Francisco Rodriguez
- Departmento de Biología Molecular y Celular, Centro Nacional de Biotecnología-CSIC, Cantoblanco, Madrid, Spain
| | - Felix M Goñi
- Unidad de Biofísica (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain
| | - Alicia Alonso
- Unidad de Biofísica (CSIC, UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain.
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30
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Gutiérrez A, Gámez R, Noa M, Mas R, Nodal C, Valle M, Mendoza N, Pérez Y, Oyarzábal A, Bucarano I, Goicochea E, Jiménez S, García H. Long-term (24 months) carcinogenicity study of D-004, a lipid extract from Roystonea regia fruits, in Sprague Dawley rats. Toxicol Lett 2016. [DOI: 10.1016/j.toxlet.2016.07.712] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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31
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Roque M, Valle M, Guimaraes F, Kostolias A, Sampaio M, Geber S. Freeze-all policy in poor responders. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.421] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Morante K, Bellomio A, Gil-Cartón D, Redondo-Morata L, Sot J, Scheuring S, Valle M, González-Mañas JM, Tsumoto K, Caaveiro JMM. Identification of a Membrane-bound Prepore Species Clarifies the Lytic Mechanism of Actinoporins. J Biol Chem 2016; 291:19210-19219. [PMID: 27445331 PMCID: PMC5016661 DOI: 10.1074/jbc.m116.734053] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [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: 04/21/2016] [Indexed: 11/06/2022] Open
Abstract
Pore-forming toxins (PFTs) are cytolytic proteins belonging to the molecular warfare apparatus of living organisms. The assembly of the functional transmembrane pore requires several intermediate steps ranging from a water-soluble monomeric species to the multimeric ensemble inserted in the cell membrane. The non-lytic oligomeric intermediate known as prepore plays an essential role in the mechanism of insertion of the class of β-PFTs. However, in the class of α-PFTs, like the actinoporins produced by sea anemones, evidence of membrane-bound prepores is still lacking. We have employed single-particle cryo-electron microscopy (cryo-EM) and atomic force microscopy to identify, for the first time, a prepore species of the actinoporin fragaceatoxin C bound to lipid vesicles. The size of the prepore coincides with that of the functional pore, except for the transmembrane region, which is absent in the prepore. Biochemical assays indicated that, in the prepore species, the N terminus is not inserted in the bilayer but is exposed to the aqueous solution. Our study reveals the structure of the prepore in actinoporins and highlights the role of structural intermediates for the formation of cytolytic pores by an α-PFT.
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Affiliation(s)
- Koldo Morante
- From the Department of Bioengineering, Graduate School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan.,the Department of Biochemistry and Molecular Biology and.,Biofisika Institute (UPV/EHU, CSIC), University of the Basque Country, P. O. Box 644, 48080 Bilbao, Spain
| | - Augusto Bellomio
- the Department of Biochemistry and Molecular Biology and.,Biofisika Institute (UPV/EHU, CSIC), University of the Basque Country, P. O. Box 644, 48080 Bilbao, Spain
| | - David Gil-Cartón
- the Structural Biology Unit, Center for Cooperative Research in Biosciences, CICbiogune, 48160 Derio, Spain
| | - Lorena Redondo-Morata
- the U1006 INSERM, Aix-Marseille Université, Parc Scientifique et Technologique de Luminy, 163 Avenue de Luminy, 13009 Marseille, France, and
| | - Jesús Sot
- the Department of Biochemistry and Molecular Biology and.,Biofisika Institute (UPV/EHU, CSIC), University of the Basque Country, P. O. Box 644, 48080 Bilbao, Spain
| | - Simon Scheuring
- the U1006 INSERM, Aix-Marseille Université, Parc Scientifique et Technologique de Luminy, 163 Avenue de Luminy, 13009 Marseille, France, and
| | - Mikel Valle
- the Structural Biology Unit, Center for Cooperative Research in Biosciences, CICbiogune, 48160 Derio, Spain
| | | | - Kouhei Tsumoto
- From the Department of Bioengineering, Graduate School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan, .,the Institute of Medical Science, University of Tokyo, Minato-ku, 108-8639 Tokyo, Japan
| | - Jose M M Caaveiro
- From the Department of Bioengineering, Graduate School of Engineering, University of Tokyo, Bunkyo-ku, Tokyo 113-8656, Japan,
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34
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Van Tussenbroek BI, Soissons LM, Bouma TJ, Asmus R, Auby I, Brun FG, Cardoso PG, Desroy N, Fournier J, Ganthy F, Garmendia JM, Godet L, Grilo TF, Kadel P, Ondiviela B, Peralta G, Recio M, Valle M, Van der Heide T, Van Katwijk MM. Pollen limitation may be a common Allee effect in marine hydrophilous plants: implications for decline and recovery in seagrasses. Oecologia 2016; 182:595-609. [PMID: 27272209 DOI: 10.1007/s00442-016-3665-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Accepted: 05/25/2016] [Indexed: 11/25/2022]
Abstract
Pollen limitation may be an important factor in accelerated decline of sparse or fragmented populations. Little is known whether hydrophilous plants (pollen transport by water) suffer from an Allee effect due to pollen limitation or not. Hydrophilous pollination is a typical trait of marine angiosperms or seagrasses. Although seagrass flowers usually have high pollen production, floral densities are highly variable. We evaluated pollen limitation for intertidal populations of the seagrass Zostera noltei in The Netherlands and found a significant positive relation between flowering spathe density and fruit-set, which was suboptimal at <1200 flowering spathes m(-2) (corresponding to <600 reproductive shoots m(-2)). A fragmented population had ≈35 % lower fruit-set at similar reproductive density than a continuous population. 75 % of all European populations studied over a large latitudinal gradient had flowering spathe densities below that required for optimal fruit-set, particularly in Southern countries. Literature review of the reproductive output of hydrophilous pollinated plants revealed that seed- or fruit-set of marine hydrophilous plants is generally low, as compared to hydrophilous freshwater and wind-pollinated plants. We conclude that pollen limitation as found in Z. noltei may be a common Allee effect for seagrasses, potentially accelerating decline and impairing recovery even after environmental conditions have improved substantially.
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Affiliation(s)
- B I Van Tussenbroek
- Department of Environmental Science, Institute for Wetland and Water Research, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
- Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apdo Postal 1152, Cancún, Q. Roo, Mexico
| | - L M Soissons
- Department of Estuarine and Delta Systems (EDS), NIOZ Royal Netherlands Institute for Sea Research, Utrecht University, 4400 AC, Yerseke, The Netherlands.
| | - T J Bouma
- Department of Estuarine and Delta Systems (EDS), NIOZ Royal Netherlands Institute for Sea Research, Utrecht University, 4400 AC, Yerseke, The Netherlands
| | - R Asmus
- Alfred-Wegener-Institut Helmholtz-Zentrum für Polar-und Meeresforschung, Wadden Sea Station Sylt, Hafenstrasse 43, 25992, List, Germany
| | - I Auby
- IFREMER-LER/AR, Quai du Commandant Silhouette, 33120, Arcachon, France
| | - F G Brun
- Departamento de Biología, Área de Ecología, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - P G Cardoso
- Department of Life Sciences, IMAR-Institute of Marine Research, University of Coimbra, 3004-517, Coimbra, Portugal
| | - N Desroy
- IFREMER-LER Dinard, 38 rue du Port Blanc, 35800, Dinard, France
| | - J Fournier
- UMR 7208 BOREA, Station de Biologie Marine MNHN, CNRS, Place de la Croix, BP 225, 29182, Concarneau Cedex, France
| | - F Ganthy
- IFREMER-LER/AR, Quai du Commandant Silhouette, 33120, Arcachon, France
| | - J M Garmendia
- Marine Research Division, AZTI-Tecnalia, Herrera Kaia Portualdea z/g, 20110, Pasaia, Spain
| | - L Godet
- CNRS, UMR 6554 LETG-Nantes Géolittomer, Université de Nantes, B.P. 81227, 44312, Nantes Cedex 3, France
| | - T F Grilo
- Department of Life Sciences, CFE-Centre for Functional Ecology, University of Coimbra, 3001-455, Coimbra, Portugal
| | - P Kadel
- Alfred-Wegener-Institut Helmholtz-Zentrum für Polar-und Meeresforschung, Wadden Sea Station Sylt, Hafenstrasse 43, 25992, List, Germany
| | - B Ondiviela
- Environmental Hydraulics Institute "IH Cantabria", Parque Científico y Tecnológico de Cantabria, Universidad de Cantabria, C/Isabel Torres No 15, 39011, Santander, Spain
| | - G Peralta
- Departamento de Biología, Área de Ecología, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Puerto Real, 11510, Cádiz, Spain
| | - M Recio
- Environmental Hydraulics Institute "IH Cantabria", Parque Científico y Tecnológico de Cantabria, Universidad de Cantabria, C/Isabel Torres No 15, 39011, Santander, Spain
| | - M Valle
- Marine Research Division, AZTI-Tecnalia, Herrera Kaia Portualdea z/g, 20110, Pasaia, Spain
- Central Research Department, Universidad Laica Eloy Alfaro de Manabí, Ciudadela Universitaria, vía San Mateo s/n, 13-05-2732, Manta, Manabí, Ecuador
| | - T Van der Heide
- Department of Aquatic Ecology and Environmental Biology, Institute for Wetland and Water Research, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
| | - M M Van Katwijk
- Department of Environmental Science, Institute for Wetland and Water Research, Radboud University, Heyendaalseweg 135, 6525 AJ, Nijmegen, The Netherlands
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Brustolin M, Talavera S, Santamaría C, Rivas R, Pujol N, Aranda C, Marquès E, Valle M, Verdún M, Pagès N, Busquets N. Culex pipiens and Stegomyia albopicta (= Aedes albopictus) populations as vectors for lineage 1 and 2 West Nile virus in Europe. Med Vet Entomol 2016; 30:166-173. [PMID: 26890285 DOI: 10.1111/mve.12164] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/03/2015] [Revised: 12/01/2015] [Accepted: 12/10/2015] [Indexed: 06/05/2023]
Abstract
The emerging disease West Nile fever is caused by West Nile virus (WNV), one of the most widespread arboviruses. This study represents the first test of the vectorial competence of European Culex pipiens Linnaeus 1758 and Stegomyia albopicta (= Aedes albopictus) (both: Diptera: Culicidae) populations for lineage 1 and 2 WNV isolated in Europe. Culex pipiens and S. albopicta populations were susceptible to WNV infection, had disseminated infection, and were capable of transmitting both WNV lineages. This is the first WNV competence assay to maintain mosquito specimens under environmental conditions mimicking the field (day/night) conditions associated with the period of maximum expected WNV activity. The importance of environmental conditions is discussed and the issue of how previous experiments conducted in fixed high temperatures may have overestimated WNV vector competence results with respect to natural environmental conditions is analysed. The information presented should be useful to policymakers and public health authorities for establishing effective WNV surveillance and vector control programmes. This would improve preparedness to prevent future outbreaks.
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Affiliation(s)
- M Brustolin
- Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - S Talavera
- Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - C Santamaría
- Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - R Rivas
- Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - N Pujol
- Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - C Aranda
- Servei de Control de Mosquits, Consell Comarcal del Baix Llobregat, Barcelona, Spain
| | - E Marquès
- Servei de Control de Mosquits de la Badia de Roses i del Baix Ter, Empuriabrava, Spain
| | - M Valle
- Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - M Verdún
- Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - N Pagès
- Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Universitat Autònoma de Barcelona, Barcelona, Spain
| | - N Busquets
- Centre de Recerca en Sanitat Animal (CReSA), Institut de Recerca i Tecnologia Agroalimentàries (IRTA), Universitat Autònoma de Barcelona, Barcelona, Spain
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Sot J, Manni MM, Viguera AR, Castañeda V, Cano A, Alonso C, Gil D, Valle M, Alonso A, Goñi FM. High-melting lipid mixtures and the origin of detergent-resistant membranes studied with temperature-solubilization diagrams. Biophys J 2016; 107:2828-2837. [PMID: 25517149 DOI: 10.1016/j.bpj.2014.10.063] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Revised: 10/22/2014] [Accepted: 10/29/2014] [Indexed: 01/05/2023] Open
Abstract
The origin of resistance to detergent solubilization in certain membranes, or membrane components, is not clearly understood. We have studied the solubilization by Triton X-100 of binary mixtures composed of egg sphingomyelin (SM) and either ceramide, diacylglycerol, or cholesterol. Solubilization has been assayed in the 4-50°C range, and the results are summarized in a novel, to our knowledge, form of plots, that we have called temperature-solubilization diagrams. Despite using a large detergent excess (lipid/detergent 1:20 mol ratio) and extended solubilization times (24-48 h) certain mixtures were not amenable to Triton X-100 solubilization at one or more temperatures. DSC of all the lipid mixtures, and of all the lipid + detergent mixtures revealed that detergent resistance was associated with the presence of gel domains at the assay temperature. Once the system melted down, solubilization could occur. In general adding high-melting lipids limited the solubilization, whereas the addition of low-melting lipids promoted it. Lipidomic analysis of Madin-Darby canine kidney cell membranes and of the corresponding detergent-resistant fraction indicated a large enrichment of the nonsolubilized components in saturated diacylglycerol and ceramide. SM-cholesterol mixtures were special in that detergent solubilization was accompanied, for certain temperatures and compositions, by an independent phenomenon of reassembly of the partially solubilized lipid bilayers. The temperature at which lysis and reassembly prevailed was ∼25°C, thus for some SM-cholesterol mixtures solubilization occurred both above and below 25°C, but not at that temperature. These observations can be at the origin of the detergent resistance effects observed with cell membranes, and they also mean that cholesterol-containing detergent-resistant membrane remnants cannot correspond to structures existing in the native membrane before detergent addition.
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Affiliation(s)
- Jesús Sot
- Unidad de Biofísica (CSIC,UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain
| | - Marco M Manni
- Unidad de Biofísica (CSIC,UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain
| | - Ana R Viguera
- Unidad de Biofísica (CSIC,UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain
| | - Verónica Castañeda
- Unidad de Biofísica (CSIC,UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain
| | - Ainara Cano
- OWL, Parque Científico y Tecnológico de Bizkaia, Bizkaia, Spain
| | - Cristina Alonso
- OWL, Parque Científico y Tecnológico de Bizkaia, Bizkaia, Spain
| | - David Gil
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CICbiogune, Derio, Spain
| | - Mikel Valle
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CICbiogune, Derio, Spain
| | - Alicia Alonso
- Unidad de Biofísica (CSIC,UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain
| | - Félix M Goñi
- Unidad de Biofísica (CSIC,UPV/EHU) and Departamento de Bioquímica, Universidad del País Vasco, Bilbao, Spain.
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Valle AM, Casas I, Valle M, Cabeza J. CP-128 Experience of use in hospital with sofosbuvir: Efficacy and safety of treatment. Eur J Hosp Pharm 2016. [DOI: 10.1136/ejhpharm-2016-000875.128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Alonso A, Landajuela A, Hervas JH, Anton Z, Montes LR, Gil D, Valle M, Rodriguez JF, Goni FM. Lipid Modulation of LC3/GABARAP-Mediated Autophagosomal Elongation. Biophys J 2016. [DOI: 10.1016/j.bpj.2015.11.1362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Franceschi M, Seminara L, Pinna L, Dosen S, Farina D, Valle M. Preliminary evaluation of the tactile feedback system based on artificial skin and electrotactile stimulation. Annu Int Conf IEEE Eng Med Biol Soc 2016; 2015:4554-7. [PMID: 26737307 DOI: 10.1109/embc.2015.7319407] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
This research is motivated by the need of integrating cutaneous sensing into a prosthetic device, enabling a bidirectional communication between the amputee and the prosthetic limb. An electronic skin based on piezoelectric polymer sensors transduces mechanical contact into electrical response which is conveyed to the human subject by electrotactile stimulation. Rectangular electrode arrays are placed on each patient's forearm and experiments are conducted on five different subjects to determine how well the orientation, position and direction of single lines are recognized. Overall, subjects discriminate the different touch modalities with acceptable success rates. In particular, the direction is identified at best and longitudinal lines on the patient's skin are recognized with the highest success rates. These preliminary results assess the feasibility of the artificial skin - electrostimulation system for prosthetic applications.
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Agirrezabala X, Méndez-López E, Lasso G, Sánchez-Pina MA, Aranda M, Valle M. The near-atomic cryoEM structure of a flexible filamentous plant virus shows homology of its coat protein with nucleoproteins of animal viruses. eLife 2015; 4:e11795. [PMID: 26673077 PMCID: PMC4739775 DOI: 10.7554/elife.11795] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [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: 09/22/2015] [Accepted: 12/15/2015] [Indexed: 11/23/2022] Open
Abstract
Flexible filamentous viruses include economically important plant pathogens. Their viral particles contain several hundred copies of a helically arrayed coat protein (CP) protecting a (+)ssRNA. We describe here a structure at 3.9 Å resolution, from electron cryomicroscopy, of Pepino mosaic virus (PepMV), a representative of the genus Potexvirus (family Alphaflexiviridae). Our results allow modeling of the CP and its interactions with viral RNA. The overall fold of PepMV CP resembles that of nucleoproteins (NPs) from the genus Phlebovirus (family Bunyaviridae), a group of enveloped (-)ssRNA viruses. The main difference between potexvirus CP and phlebovirus NP is in their C-terminal extensions, which appear to determine the characteristics of the distinct multimeric assemblies – a flexuous, helical rod or a loose ribonucleoprotein. The homology suggests gene transfer between eukaryotic (+) and (-)ssRNA viruses. DOI:http://dx.doi.org/10.7554/eLife.11795.001 A group of “flexible filamentous” viruses can cause serious diseases in a wide variety of crops and other plants. Each virus particle contains a single molecule called ribonucleic acid (RNA), which is protected by hundreds of copies of a coat protein. The RNA and coat proteins are arranged in a helical fashion to make a flexible rod-shaped particle. The flexibility of these viruses makes it difficult to carry out in-depth studies of their three-dimensional structures. As a result, we do not know how the RNA and coat proteins interact to form the structure of each virus particle. Agirrezabala et al. used a technique called cryo-electron microscopy (or cryoEM for short) to generate a highly detailed three-dimensional model of a flexible filamentous virus called Pepino Mosaic Virus. Agirezabala et al.’s findings reveal how the virus particles assemble, and the interactions between the coat protein and the ssRNA. Unexpectedly, the structure of the coat protein from Pepino Mosiac Virus is very similar to the structure of “nucleoproteins” from a group of viruses called the Phleboviruses, which infect animals. This similarity is striking and suggests that the gene that encodes these proteins has been transferred between the two groups of viruses during evolution. A future challenge is to find out whether this similarity extends to other groups of viruses. DOI:http://dx.doi.org/10.7554/eLife.11795.002
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Affiliation(s)
- Xabier Agirrezabala
- Structural Biology Unit, Center for Cooperative Research in Biosciences, Derio, Spain
| | - Eduardo Méndez-López
- Centro de Edafología y Biología Aplicada del Segura, Murcia, Spain.,Consejo Superior de Investigaciones Científicas, Murcia, Spain
| | - Gorka Lasso
- Department of Biochemistry and Molecular Biophysics, Columbia University, New York, United States
| | - M Amelia Sánchez-Pina
- Centro de Edafología y Biología Aplicada del Segura, Murcia, Spain.,Consejo Superior de Investigaciones Científicas, Murcia, Spain
| | - Miguel Aranda
- Centro de Edafología y Biología Aplicada del Segura, Murcia, Spain.,Consejo Superior de Investigaciones Científicas, Murcia, Spain
| | - Mikel Valle
- Structural Biology Unit, Center for Cooperative Research in Biosciences, Derio, Spain
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Berrazueta A, Carbajales C, Ayuela-Azcarate JM, Martinez Barrio E, Tejedor P, Portugal E, Valle M, Gero M. Transaortic valve replacement, complications and validation of a protocol in ICU. Intensive Care Med Exp 2015. [PMCID: PMC4797106 DOI: 10.1186/2197-425x-3-s1-a542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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42
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Lete MG, Sot J, Gil D, Valle M, Medina M, Goñi FM, Alonso A. Histones cause aggregation and fusion of lipid vesicles containing phosphatidylinositol-4-phosphate. Biophys J 2015; 108:863-871. [PMID: 25692591 DOI: 10.1016/j.bpj.2014.12.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Revised: 12/07/2014] [Accepted: 12/09/2014] [Indexed: 12/13/2022] Open
Abstract
In a previous article, we demonstrated that histones (H1 or histone octamers) interact with negatively charged bilayers and induce extensive aggregation of vesicles containing phosphatidylinositol-4-phosphate (PIP) and, to a lesser extent, vesicles containing phosphatidylinositol (PI). Here, we found that vesicles containing PIP, but not those containing PI, can undergo fusion induced by histones. Fusion was demonstrated through the observation of intervesicular mixing of total lipids and inner monolayer lipids, and by ultrastructural and confocal microscopy studies. Moreover, in both PI- and PIP-containing vesicles, histones caused permeabilization and release of vesicular aqueous contents, but the leakage mechanism was different (all-or-none for PI and graded release for PIP vesicles). These results indicate that histones could play a role in the remodeling of the nuclear envelope that takes place during the mitotic cycle.
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Affiliation(s)
- Marta G Lete
- Unidad de Biofísica (CSIC, UPV/EHU), Universidad del País Vasco, Leioa, Spain; Departamento de Bioquímica, Universidad del País Vasco, Leioa, Spain
| | - Jesus Sot
- Unidad de Biofísica (CSIC, UPV/EHU), Universidad del País Vasco, Leioa, Spain; Departamento de Bioquímica, Universidad del País Vasco, Leioa, Spain
| | - David Gil
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, Derio, Spain
| | - Mikel Valle
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, Derio, Spain
| | - Milagros Medina
- Departamento de Bioquímica y Biología Molecular y Celular, Facultad de Ciencias, Universidad de Zaragoza, Zaragoza, Spain; Instituto de Biocomputación y Física de Sistemas Complejos, Unidad Asociada BIFI-IQFR, Universidad de Zaragoza, Zaragoza, Spain
| | - Felix M Goñi
- Unidad de Biofísica (CSIC, UPV/EHU), Universidad del País Vasco, Leioa, Spain; Departamento de Bioquímica, Universidad del País Vasco, Leioa, Spain
| | - Alicia Alonso
- Unidad de Biofísica (CSIC, UPV/EHU), Universidad del País Vasco, Leioa, Spain; Departamento de Bioquímica, Universidad del País Vasco, Leioa, Spain.
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Barba M, Pizzuti L, Conti L, Mandoj C, Digiesi G, Antenucci A, Sergi D, Di Lauro L, Amodio A, Carpano S, Sperati F, Valle M, Garofalo A, Vizza E, Vincenzoni C, Corrado G, Maugeri-Saccà M, Vici P. The impact of fasting glucose on clinical-pathological features in epithelial ovarian cancer: results from a historic cohort. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv339.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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44
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Roque M, Valle M, Marques F, Sampaio M, Geber S. Intracytoplasmic sperm injection outcomes with cryopreserved testicular sperm aspiration samples. Andrologia 2015; 48:252-6. [PMID: 25998234 DOI: 10.1111/and.12439] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/31/2015] [Indexed: 11/28/2022] Open
Abstract
Intracytoplasmic sperm injection (ICSI) may be performed with testicular frozen-thawed spermatozoa in patients with nonobstructive azoospermia (NOA). Sperm retrieval can be performed in advance of oocyte aspiration, as it may avoid the possibility of no recovery of spermatozoa on the day of oocyte pickup. There are few studies available in the literature concerning the use of frozen-thawed spermatozoa obtained from testicular sperm aspiration (TESA). To evaluate the effects and the outcomes of ICSI with frozen-thawed spermatozoa obtained by TESA, we performed a retrospective analysis of 43 ICSI cycles using frozen-thawed TESA. We obtained acceptable results with a fertilisation rate of 67.9%, an implantation rate (IR) of 17.1%, and clinical and ongoing pregnancy rates of 41.9% and 37.2% respectively. The results of this study suggest that performing ICSI using cryopreserved frozen-thawed testicular spermatozoa with TESA as a first option is a viable, safe, economic and effective method for patients with NOA.
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Affiliation(s)
- M Roque
- Origen - Center for Reproductive Medicine, Rio de Janeiro, Brazil
| | - M Valle
- Origen - Center for Reproductive Medicine, Rio de Janeiro, Brazil
| | - F Marques
- Origen - Center for Reproductive Medicine, Rio de Janeiro, Brazil
| | - M Sampaio
- Origen - Center for Reproductive Medicine, Belo Horizonte, Brazil
| | - S Geber
- Origen - Center for Reproductive Medicine, Belo Horizonte, Brazil.,Medical School - Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
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45
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Fernández-Millán P, Lázaro M, Cansız-Arda Ş, Gerhold JM, Rajala N, Schmitz CA, Silva-Espiña C, Gil D, Bernadó P, Valle M, Spelbrink JN, Solà M. The hexameric structure of the human mitochondrial replicative helicase Twinkle. Nucleic Acids Res 2015; 43:4284-95. [PMID: 25824949 PMCID: PMC4417153 DOI: 10.1093/nar/gkv189] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [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: 02/21/2015] [Accepted: 02/23/2015] [Indexed: 01/28/2023] Open
Abstract
The mitochondrial replicative helicase Twinkle is involved in strand separation at the replication fork of mitochondrial DNA (mtDNA). Twinkle malfunction is associated with rare diseases that include late onset mitochondrial myopathies, neuromuscular disorders and fatal infantile mtDNA depletion syndrome. We examined its 3D structure by electron microscopy (EM) and small angle X-ray scattering (SAXS) and built the corresponding atomic models, which gave insight into the first molecular architecture of a full-length SF4 helicase that includes an N-terminal zinc-binding domain (ZBD), an intermediate RNA polymerase domain (RPD) and a RecA-like hexamerization C-terminal domain (CTD). The EM model of Twinkle reveals a hexameric two-layered ring comprising the ZBDs and RPDs in one layer and the CTDs in another. In the hexamer, contacts in trans with adjacent subunits occur between ZBDs and RPDs, and between RPDs and CTDs. The ZBDs show important structural heterogeneity. In solution, the scattering data are compatible with a mixture of extended hexa- and heptameric models in variable conformations. Overall, our structural data show a complex network of dynamic interactions that reconciles with the structural flexibility required for helicase activity.
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Affiliation(s)
- Pablo Fernández-Millán
- Structural MitoLab; Department of Structural Biology, Molecular Biology Institute Barcelona (IBMB-CSIC), Barcelona, E-08028, Spain
| | - Melisa Lázaro
- Structural Biology Unit. Centre for Cooperative Research in Biosciences, CICbioGUNE, Derio, E-48160, Spain
| | - Şirin Cansız-Arda
- Department of Pediatrics, Nijmegen Centre for Mitochondrial Disorders, Radboud University Medical Centre, Nijmegen, 6525 GA, The Netherlands
| | - Joachim M Gerhold
- Department of Pediatrics, Nijmegen Centre for Mitochondrial Disorders, Radboud University Medical Centre, Nijmegen, 6525 GA, The Netherlands
| | - Nina Rajala
- Mitochondrial DNA Maintenance Group, BioMediTech, University of Tampere, Tampere, FI-33014, Finland
| | - Claus-A Schmitz
- Structural MitoLab; Department of Structural Biology, Molecular Biology Institute Barcelona (IBMB-CSIC), Barcelona, E-08028, Spain
| | - Cristina Silva-Espiña
- Structural MitoLab; Department of Structural Biology, Molecular Biology Institute Barcelona (IBMB-CSIC), Barcelona, E-08028, Spain
| | - David Gil
- Structural Biology Unit. Centre for Cooperative Research in Biosciences, CICbioGUNE, Derio, E-48160, Spain
| | - Pau Bernadó
- Centre de Biochimie Structurale, INSERM-U1054, CNRS UMR-5048, Université de Montpellier I&II. Montpellier, F-34090, France
| | - Mikel Valle
- Structural Biology Unit. Centre for Cooperative Research in Biosciences, CICbioGUNE, Derio, E-48160, Spain
| | - Johannes N Spelbrink
- Department of Pediatrics, Nijmegen Centre for Mitochondrial Disorders, Radboud University Medical Centre, Nijmegen, 6525 GA, The Netherlands Mitochondrial DNA Maintenance Group, BioMediTech, University of Tampere, Tampere, FI-33014, Finland
| | - Maria Solà
- Structural MitoLab; Department of Structural Biology, Molecular Biology Institute Barcelona (IBMB-CSIC), Barcelona, E-08028, Spain
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Roque M, Geber S, Sampaio M, Guimarães F, Valle M. Freeze all policy: fresh versus elective frozen-thawed embryo transfer. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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47
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Roque M, Geber S, Sampaio M, Guimarães F, Valle M, Checa M. Ratio of progesterone to number of follicles on the day of final oocyte maturation as a prognostic tool in in vitro fertilization cycles. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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48
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Lasso G, Yu LPC, Gil D, Lázaro M, Tong L, Valle M. Functional conformations for pyruvate carboxylase during catalysis explored by cryoelectron microscopy. Structure 2014; 22:911-22. [PMID: 24882745 DOI: 10.1016/j.str.2014.04.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 04/20/2014] [Accepted: 04/24/2014] [Indexed: 01/15/2023]
Abstract
The tetrameric enzyme pyruvate carboxylase (PC), a biotin-dependent carboxylase, produces oxaloacetate by two consecutive reactions that take place in distant active sites. Previous crystal structures revealed two different configurations for PC tetramers, the so-called symmetric and asymmetric, which were understood as characteristic molecular architectures for PC from different organisms. We have analyzed PC samples from Staphylococcus aureus while the enzyme generates oxaloacetate, expecting PC tetramers to display the conformational landscape relevant for its functioning. Using cryoelectron microscopy (cryo-EM) and sorting techniques, we detect previously defined symmetric and asymmetric architectures, demonstrating that PC maps both arrangements by large conformational changes. Furthermore, we observe that each configuration is coupled to one of the two consecutive enzymatic reactions. The findings describe the structural transitions relevant for the allosteric control of the multifunctional PC and demonstrate that by cryo-EM and classification, we can characterize freely working macromolecules.
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Affiliation(s)
- Gorka Lasso
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160 Derio, Spain
| | - Linda P C Yu
- Department of Biological Sciences, Columbia University, New York, NY 10027, USA
| | - David Gil
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160 Derio, Spain
| | - Melisa Lázaro
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160 Derio, Spain
| | - Liang Tong
- Department of Biological Sciences, Columbia University, New York, NY 10027, USA
| | - Mikel Valle
- Structural Biology Unit, Center for Cooperative Research in Biosciences, CIC bioGUNE, 48160 Derio, Spain; Department of Biochemistry and Molecular Biology, University of the Basque Country, P.O. Box 644, 48080 Bilbao, Spain.
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49
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Valle E, Valle M, Valle L, Reimão R. Blood pressure monitoring in restless legs syndrome (Willis–Ekbom disease) patients. Sleep Med 2013. [DOI: 10.1016/j.sleep.2013.11.717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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50
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Valle M, Federici O, Carboni F, Toma L, Gallo MT, Prignano G, Giannarelli D, Cenci L, Garofalo A. Postoperative infections after cytoreductive surgery and HIPEC for peritoneal carcinomatosis: proposal and results from a prospective protocol study of prevention, surveillance and treatment. Eur J Surg Oncol 2013; 40:950-6. [PMID: 24246609 DOI: 10.1016/j.ejso.2013.10.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 10/14/2013] [Accepted: 10/19/2013] [Indexed: 12/27/2022] Open
Abstract
The incidence of infectious complications due to several contributory causes is particularly elevated and life-threatening in patients undergoing peritonectomy and HIPEC procedure for peritoneal carcinomatosis. Following a previous experience, we started a prospective protocol study of preoperative screening, perioperative prophylaxis and postoperative surveillance and treatment. A total of 111 patients with peritoneal carcinomatosis of various origin underwent CRS with HIPEC between April 2004 and December 2012. The group was divided into a pilot group of 30 patients (04/04 to 05/08) and a main group of 81 patients (06/08 to 12/12). Overall postoperative morbidity rate was 44%, with 35.8% of symptomatic infections. No post-operative mortality was observed. Microorganisms were isolated in 24 patients (80.0%) in the first group and 54 (66.7%) in the second. They were symptomatic in 18 cases (75.0%) and 25 (46.3%) cases respectively. In addition, 7 invasive candidosis were recorded (25.9%). Colon resection (P = 0.01) and duration of surgery (P = 0.0008) were associated with infection at logistic regression model. Concerning symptomatic infections, only Infection Risk Index (P = 0.009) showed significance at multivariate analysis. Despite a significant incidence of infectious complications, establishment of a prevention, surveillance and treatment protocol lead to a zero mortality rate in the observed patients of our experience. Owing to the obtained results, we suggest the use of a standardized protocol for the prevention, monitoring and treatment in all patients enrolled for cytoreductive surgery and HIPEC.
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Affiliation(s)
- M Valle
- Department of Digestive Surgery, Regina Elena National Cancer Institute, Rome, Italy.
| | - O Federici
- Department of Digestive Surgery, Regina Elena National Cancer Institute, Rome, Italy
| | - F Carboni
- Department of Digestive Surgery, Regina Elena National Cancer Institute, Rome, Italy
| | - L Toma
- Department of Infectivology, Regina Elena National Cancer Institute, Rome, Italy
| | - M T Gallo
- Department of Clinical Pathology and Microbiology, Regina Elena National Cancer Institute, Rome, Italy
| | - G Prignano
- Department of Clinical Pathology and Microbiology, Regina Elena National Cancer Institute, Rome, Italy
| | - D Giannarelli
- Department of Biostatistic, Regina Elena Cancer Institute, Rome, Italy
| | - L Cenci
- Department of Digestive Surgery, Regina Elena National Cancer Institute, Rome, Italy
| | - A Garofalo
- Department of Digestive Surgery, Regina Elena National Cancer Institute, Rome, Italy
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