1
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Mandato D, Fraulo P, Romano A, Mazzone P, Colarusso G, Noschese R, Peruzy MF, Ambrosio RL, Galiero G, Baldi L. An investigation protocol to manage a foodborne outbreak in a disaster event. Eur J Public Health 2021. [DOI: 10.1093/eurpub/ckab165.233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
During disaster events, the displaced populations living in tent camps are at high risk from foodborne illness outbreaks (FBO) as in these circumstances it is difficult to follow proper hygienic procedures during food handling and storage. When an outbreak occurs, an epidemiological investigation able to identify the source(s) of the exposure is essential to rapidly establish control measures to prevent continuing episodes of illness. This work aimed to evaluate the effectiveness and the applicability under simulated field conditions of an investigation protocol to be used during a FBO. Moreover, the application of the software ‘TOSSINFO' for data analysis was evaluated.
Methods
In May 2018, a FBO associated with the consumption of a tuna affecting 46 out of 75 people present in a tent camp in southern Italy was simulated. During the simulation, two teams of doctors and veterinarians participated in the investigation. The investigation protocol involved three steps: environmental inspection, epidemiological investigation, and data analysis through TOSSINFO. This software allows calculating different epidemiological indicators, several measures of association, and the visualization of the progression of the outbreak through epidemic curves.
Results
At the end of the exercise, both teams were able to trace the source of the infection. After data collection and data analysis, the groups demonstrated a strong association between illness people and tuna consumption. Furthermore, the teams achieved similar
Results
RR (7.50 vs 7.01), OR (27 vs 28), and Chi-square (12.1 vs 10.1).
Conclusions
The results demonstrated the validity of the procedure and the simple execution of the software analysis. These guidelines represent an opportunity for the implementation of foodborne disease management strategies and could be used throughout the community, leading to an improvement of the Public Health surveillance system.
Key messages
These guidelines allow for effective management of a food toxinfection episode. The original software TOSSINFO used in this procedure enables quick and easy identification of infected food.
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Affiliation(s)
- D Mandato
- Institute for Experimental Veterinary Medicine of Southern Italy, Portici, Italy
| | - P Fraulo
- Institute for Experimental Veterinary Medicine of Southern Italy, Portici, Italy
| | - A Romano
- Local Health Authority, Benevento, Italy
| | - P Mazzone
- Institute for Experimental Veterinary Medicine of Southern Italy, Portici, Italy
| | - G Colarusso
- Institute for Experimental Veterinary Medicine of Southern Italy, Portici, Italy
| | - R Noschese
- Institute for Experimental Veterinary Medicine of Southern Italy, Portici, Italy
| | - MF Peruzy
- Department of Veterinary Medicine and Animal Production, University of Naples, Naples, Italy
| | - RL Ambrosio
- Department of Veterinary Medicine and Animal Production, University of Naples, Naples, Italy
| | - G Galiero
- Institute for Experimental Veterinary Medicine of Southern Italy, Portici, Italy
| | - L Baldi
- Institute for Experimental Veterinary Medicine of Southern Italy, Portici, Italy
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2
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Colarusso G, Mazzone P, Peirce E, Pellicanò R, Della Rotonda M, Di Loria G, Baldi L, Mandato D. Food business operator risk categorization. Eur J Public Health 2021. [DOI: 10.1093/eurpub/ckab165.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Issue
EU Reg 625/2017 establishes that all Food Business Operator FBO needs to be categorised based on risk. The risk rating is obtained by summing the scores of the non-conformities and risk factors checked.
Description of the problem
In the past, various categorisation systems have been used but due to many FBO present in the regional territory, a new system of categorisation rapid and efficient is required.
Results
The system classifies the risk of FBO in two phases: the first, based on static criteria (type and volume of production, market areas), in which a default category is established; the second, based on dynamic and technical criteria (provisions and scores of official control, structural and productive features), in which a definitive category is established. When a FBO is set up, it presents a declaration of start-up that included the static criteria: a preliminary risk category is determined. The authorities assign a definitive rating by a complex inspection, during which specific check-lists of the dynamic and technical criteria are completed. Each element is assigned a percentage weight, which contributes to the risk assessment, and so to the frequency of controls. A value >70% means high risk and 1 control per year; a value of 69.9-50% means medium risk and 1 control every 2 year; a value of 59.9-30% means low risk and 1 control every 3 years, and a value <29.9% indicates a negligible risk and controls on demand. In the period between 2 inspections, the score will be updated by the outcomes of any other official controls. The rating is updated according to favourable or unfavourable outcome.
Lessons
In addition to being efficacious and efficient, this new system of categorisation optimises the work of the authorities.
Key messages
This new categorisation system makes risk-based controls simpler and more efficacious. The project involves various Italian regions and the OECD, thereby enabling official controls to be standardised at the European level.
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Affiliation(s)
- G Colarusso
- Regional Observatories, Epidemiology and Biostatistic, Istituto Zooprofilattico Sperimentale, Portici, Italy
| | - P Mazzone
- Regional Observatories, Epidemiology and Biostatistic, Istituto Zooprofilattico Sperimentale, Portici, Italy
| | - E Peirce
- Regional Observatories, Epidemiology and Biostatistic, Istituto Zooprofilattico Sperimentale, Portici, Italy
| | - R Pellicanò
- Regional Observatories, Epidemiology and Biostatistic, Istituto Zooprofilattico Sperimentale, Portici, Italy
| | | | - G Di Loria
- Vet Public Health, Regione Campania, Naples, Italy
| | - L Baldi
- Regional Observatories, Epidemiology and Biostatistic, Istituto Zooprofilattico Sperimentale, Portici, Italy
| | - D Mandato
- Regional Observatories, Epidemiology and Biostatistic, Istituto Zooprofilattico Sperimentale, Portici, Italy
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3
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Baldi L, Trentinaglia MT, Mancuso T, Peri M. Attitude toward environmental protection and toward nature: How do they shape consumer behaviour for a sustainable tomato? Food Qual Prefer 2021. [DOI: 10.1016/j.foodqual.2021.104175] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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4
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Cringoli G, Pepe P, Bosco A, Maurelli MP, Baldi L, Ciaramella P, Musella V, Buonanno ML, Capuano F, Corrado F, Ianniello D, Alves LC, Sarnelli P, Rinaldi L. An integrated approach to control Cystic Echinococcosis in southern Italy. Vet Parasitol 2021; 290:109347. [PMID: 33444910 DOI: 10.1016/j.vetpar.2021.109347] [Citation(s) in RCA: 12] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 11/13/2020] [Accepted: 12/19/2020] [Indexed: 12/13/2022]
Abstract
Cystic echinococcosis (CE) is a severe zoonosis, caused by the larval stage of the tapeworm Echinococcus granulosus. This helminth infection is of increasing public health and socio-economic concern due to the considerable morbidity rates that cause economic losses both in the public health sector and in the livestock industry. Control programmes against E. granulosus are considered long-term actions which require an integrated approach and high expenditure of time and financial resources. Since 2010, an integrated approach to control CE has been implemented in a highly endemic area of continental southern Italy (Campania region). Innovative procedures and tools have been developed and exploited during the control programme based on the following strategies: i) active and passive surveillance in livestock (using geospatial tools for georeferencing), ii) diagnosis in dogs (using the FLOTAC techniques and molecular analysis), iii) targeted treatment of farm dogs (using purpose-built confinement cages), iv) early diagnosis in livestock (by ultrasonography), v) surveillance in humans (through hospital discharge records analysis), vi) monitoring the food chain (analysing raw vegetables), vii) outreach activities to the general public (through dissemination material, e.g. brochures, gadgets, videos, virtual reality). Over eight years, the integrated approach and the new strategies developed have resulted in a noteworthy reduction of the parasite infection rates in livestock (e.g. up to 30 % in sheep). The results obtained so far highlight that using a one health multidisciplinary and multi-institution effort is of pivotal importance in preparing CE control programmes at regional level and could be extended to other endemic Mediterranean areas.
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Affiliation(s)
- G Cringoli
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy; Centro Regionale per il Monitoraggio delle Parassitosi (CREMOPAR), Regione Campania, Eboli, SA, Italy; Centro di Riferimento Regionale per le Malattie degli Animali Domestici (CReSan), Regione Campania, Naples, Italy
| | - P Pepe
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy; Centro Regionale per il Monitoraggio delle Parassitosi (CREMOPAR), Regione Campania, Eboli, SA, Italy
| | - A Bosco
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy; Centro Regionale per il Monitoraggio delle Parassitosi (CREMOPAR), Regione Campania, Eboli, SA, Italy
| | - M P Maurelli
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy; Centro Regionale per il Monitoraggio delle Parassitosi (CREMOPAR), Regione Campania, Eboli, SA, Italy
| | - L Baldi
- Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Naples, Italy
| | - P Ciaramella
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy
| | - V Musella
- Department of Health Sciences, University of Catanzaro Magna Graecia, Catanzaro, Italy
| | - M L Buonanno
- Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Naples, Italy
| | - F Capuano
- Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Naples, Italy
| | - F Corrado
- Istituto Zooprofilattico Sperimentale del Mezzogiorno, Portici, Naples, Italy
| | - D Ianniello
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy; Centro Regionale per il Monitoraggio delle Parassitosi (CREMOPAR), Regione Campania, Eboli, SA, Italy
| | - L C Alves
- Department of Veterinary Medicine, Federal Rural University of Pernambuco, Recife, Brazil
| | - P Sarnelli
- Centro Regionale per il Monitoraggio delle Parassitosi (CREMOPAR), Regione Campania, Eboli, SA, Italy; UOD Prevenzione e Sanità Pubblica Veterinaria Regione Campania, Naples, Italy
| | - L Rinaldi
- Department of Veterinary Medicine and Animal Production, University of Naples Federico II, Naples, Italy; Centro Regionale per il Monitoraggio delle Parassitosi (CREMOPAR), Regione Campania, Eboli, SA, Italy; Centro di Riferimento Regionale per le Malattie degli Animali Domestici (CReSan), Regione Campania, Naples, Italy.
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5
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Shen X, Dojcinovic D, Baldi L, Hacker DL, Luescher IF, Wurm FM. Improved process conditions for increasing expression of MHC class II protein from a stable Drosophila S2 cell line. Biotechnol Lett 2017; 40:85-92. [PMID: 28993910 DOI: 10.1007/s10529-017-2440-0] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 09/13/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVES To investigate the effects of operational process conditions on expression of MHC class II protein from a stable Drosophila S2 cell line. RESULTS When the Drosophila S2 cells were grown in vented orbitally shaken TubeSpin bioreactor 600 containers, cell growth was improved three-fold and the yield of recombinant major histocompatibility (MHC) class II protein (HLA-DR12xHis) increased four-fold over the levels observed for the same cells cultivated in roller bottles (RB) without vented caps. Culturing in RB with vented caps while increasing the rotation speed from 6 rpm to 18 rpm also improved cell growth five-fold and protein productivity three-fold which is comparable to the levels observed in the orbitally shaken containers. Protein activity was found to be almost identical between the two vessel systems tested. CONCLUSIONS Optimized cell culture conditions and a more efficient vessel type can enhance gas transfer and mixing and lead to substantial improvement of recombinant product yields from S2 cells.
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Affiliation(s)
- Xiao Shen
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland. .,R&D Department, Cantonbio Co., Ltd, Guangzhou, 510200, China.
| | - Danijel Dojcinovic
- Molecular Immunology Group, Ludwig Center for Cancer Research, University of Lausanne, 1066, Epalinges, Switzerland.,TCMetrix Ltd, 1066, Epalinges, Switzerland.,Covance Central Laboratory Services SA, 1217, Meyrin, Switzerland
| | - Lucia Baldi
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - David L Hacker
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
| | - Immanuel F Luescher
- Molecular Immunology Group, Ludwig Center for Cancer Research, University of Lausanne, 1066, Epalinges, Switzerland.,TCMetrix Ltd, 1066, Epalinges, Switzerland
| | - Florian M Wurm
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, École Polytechnique Fédérale de Lausanne, 1015, Lausanne, Switzerland
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6
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Bologna A, Garcia-Arias A, Baldi L, Berselli A, Pagano M, Zanelli F, Bisagni G, Gervasi E, Stridi G, Candida B, Romagnani A, Gnoni R. First line treatment with carboplatin-paclitaxel-bevacizumab in ovarian cancer: retrospective review of a single institute experience. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx429.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [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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7
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Aquilini M, Baldi L, Bibet P, Bozzi R, Bruschi A, Cesario R, Cirant S, Ferro C, Gandini F, Giovenale SD, Granucci G, Fortunato T, Maddaluno G, Marco FD, Maffia G, Marra A, Mellera V, Mirizzi F, Muzzini V, Nardone A, Orsini A, Papalini M, Papitto P, Pericoli-Ridolfini V, Petrolini P, Petrosino S, Podda S, Ravera G, Righetti G, Roccon M, Santini F, Sassi M, Simonetto A, Sozzi C, Spinicchia N, Tuccillo A, Zampelli P. Chapter 11: The Heating and Current Drive Systems of the FTU. Fusion Science and Technology 2017. [DOI: 10.13182/fst04-a525] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- M. Aquilini
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - L. Baldi
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - P. Bibet
- Association EURATOM-CEA, Cadarache, F-13108 St. Paul-lez-Durance, France
| | - R. Bozzi
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - A. Bruschi
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - R. Cesario
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - S. Cirant
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - C. Ferro
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - F. Gandini
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - S. di Giovenale
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - G. Granucci
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - T. Fortunato
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - G. Maddaluno
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - F. de Marco
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - G. Maffia
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - A. Marra
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - V. Mellera
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - F. Mirizzi
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - V. Muzzini
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - A. Nardone
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - A. Orsini
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - M. Papalini
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - P. Papitto
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | | | - P. Petrolini
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - S. Petrosino
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - S. Podda
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - G.L. Ravera
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - G.B. Righetti
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - M. Roccon
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - F. Santini
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - M. Sassi
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - A. Simonetto
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - C. Sozzi
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - N. Spinicchia
- Associazione EURATOM-ENEA sulla Fusione, CR Frascati, Roma, Italy
| | - A.A. Tuccillo
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
| | - P. Zampelli
- Associazione EURATOM-ENEA-CNR sulla Fusione Istituto di Fisica del Plasma, Milano, Italy
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Baldi L, Panebianco M, Giorgi Rossi P, Di Felice E, Cassetti T, Sassatelli R, Rondini E, Boni C, Pinto C. Second-line chemotherapy in advanced pancreatic cancer patients before nab-paclitaxel introduction. Retrospective study in Reggio Emilia Clinical Cancer Centre. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw333.20] [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: 11/12/2022] Open
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9
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Masini C, Bisagni G, Ragazzi M, Bisagni A, Dallaglio K, Falco G, Ferrari G, Bassano C, Gardini G, Bologna A, Moretti G, Boni C, Baldi L, Pinto C. Relationship between HER-2 amplification and tumor infiltrating lymphocytes in breast cancer patients treated with neoadjuvant trastuzumab. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw337.18] [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: 11/14/2022] Open
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10
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Monteil DT, Juvet V, Paz J, Moniatte M, Baldi L, Hacker DL, Wurm FM. A comparison of orbitally-shaken and stirred-tank bioreactors: pH modulation and bioreactor type affect CHO cell growth and protein glycosylation. Biotechnol Prog 2016; 32:1174-1180. [PMID: 27453130 DOI: 10.1002/btpr.2328] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [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: 02/15/2016] [Revised: 07/01/2016] [Indexed: 01/21/2023]
Abstract
Orbitally shaken bioreactors (OSRs) support the suspension cultivation of animal cells at volumetric scales up to 200 L and are a potential alternative to stirred-tank bioreactors (STRs) due to their rapid and homogeneous mixing and high oxygen transfer rate. In this study, a Chinese hamster ovary cell line producing a recombinant antibody was cultivated in a 5 L OSR and a 3 L STR, both operated with or without pH control. Effects of bioreactor type and pH control on cell growth and metabolism and on recombinant protein production and glycosylation were determined. In pH-controlled bioreactors, the glucose consumption and lactate production rates were higher relative to cultures grown in bioreactors without pH control. The cell density and viability were higher in the OSRs than in the STRs, either with or without pH control. Volumetric recombinant antibody yields were not affected by the process conditions, and a glycan analysis of the antibody by mass spectrometry did not reveal major process-dependent differences in the galactosylation index. The results demonstrated that OSRs are suitable for recombinant protein production from suspension-adapted animal cells. © 2016 American Institute of Chemical Engineers Biotechnol. Prog., 32:1174-1180, 2016.
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Affiliation(s)
- Dominique T Monteil
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale De Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - Valentin Juvet
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale De Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - Jonathan Paz
- Proteomics Core Facility (PCF), École Polytechnique Fédérale De Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - Marc Moniatte
- Proteomics Core Facility (PCF), École Polytechnique Fédérale De Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - Lucia Baldi
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale De Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - David L Hacker
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale De Lausanne (EPFL), Lausanne, CH-1015, Switzerland.,Protein Expression Core Facility (PECF), École Polytechnique Fédérale De Lausanne (EPFL), Lausanne, CH-1015, Switzerland
| | - Florian M Wurm
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale De Lausanne (EPFL), Lausanne, CH-1015, Switzerland.
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11
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Monteil DT, Shen X, Tontodonati G, Baldi L, Hacker DL, Wurm FM. Disposable orbitally shaken TubeSpin bioreactor 600 for Sf9 cell cultivation in suspension. Anal Biochem 2016; 505:26-8. [PMID: 27130502 DOI: 10.1016/j.ab.2016.04.009] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 04/13/2016] [Accepted: 04/15/2016] [Indexed: 11/28/2022]
Abstract
Disposable orbitally shaken TubeSpin bioreactor 600 tubes (TS600s) were recently developed for the bench-scale cultivation of animal cells in suspension. Here we compared batch cultures of Sf9 insect cells in TS600s, spinner flasks, and shake flasks. Superior cell growth was observed in TS600s and shake flasks as compared with spinner flasks, and more favorable oxygen-enriched cell culture conditions were observed in TS600s as compared with either spinner or shake flasks. The results demonstrated the suitability of TS600s as a disposable vessel for the cultivation of Sf9 cells in suspension.
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Affiliation(s)
- Dominique T Monteil
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Xiao Shen
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Giulia Tontodonati
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Lucia Baldi
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - David L Hacker
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland; Protein Expression Core Facility (PECF), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Florian M Wurm
- Laboratory of Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
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12
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Montagnaro S, Pagnini U, Diana T, Bruno L, Baldi L, Iovane G. Comparison of fluorescence polarization assay with Rose Bengal (RB) test and complement fixation tests for the diagnosis of buffalo (Bubalus bubalis) brucellosis in a high-prevalence area. Italian Journal of Animal Science 2016. [DOI: 10.4081/ijas.2007.s2.858] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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13
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Masini C, Bisagni A, Falco G, Bassano C, Baldi L, Bisagni G, Moretti G, Albini A, Boni C, Ferrari G, Gardini G. Relationship between levels of HER-2 amplification and pathologic complete response to trastuzumab-based neoadjuvant treatment. Ann Oncol 2015. [DOI: 10.1093/annonc/mdv336.36] [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: 11/14/2022] Open
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14
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Rajendra Y, Balasubramanian S, Kiseljak D, Baldi L, Wurm FM, Hacker DL. Enhanced plasmid DNA utilization in transiently transfected CHO-DG44 cells in the presence of polar solvents. Biotechnol Prog 2015; 31:1571-8. [DOI: 10.1002/btpr.2152] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Revised: 07/31/2015] [Indexed: 11/11/2022]
Affiliation(s)
- Yashas Rajendra
- Laboratory for Cellular Biotechnology (LBTC); École Polytechnique Fédérale De Lausanne (EPFL); Lausanne 1015 Switzerland
| | - Sowmya Balasubramanian
- Laboratory for Cellular Biotechnology (LBTC); École Polytechnique Fédérale De Lausanne (EPFL); Lausanne 1015 Switzerland
| | - Divor Kiseljak
- Laboratory for Cellular Biotechnology (LBTC); École Polytechnique Fédérale De Lausanne (EPFL); Lausanne 1015 Switzerland
| | - Lucia Baldi
- Laboratory for Cellular Biotechnology (LBTC); École Polytechnique Fédérale De Lausanne (EPFL); Lausanne 1015 Switzerland
| | - Florian M. Wurm
- Laboratory for Cellular Biotechnology (LBTC); École Polytechnique Fédérale De Lausanne (EPFL); Lausanne 1015 Switzerland
| | - David L. Hacker
- Laboratory for Cellular Biotechnology (LBTC) and Protein Expression Core Facility (PECF); École Polytechnique Fédérale De Lausanne (EPFL); Lausanne 1015 Switzerland
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15
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Lazzerini PE, Brucato A, Capecchi PL, Baldi L, Bacarelli MR, Nucci C, Moscadelli V, Morozzi G, Boutjdir M, Laghi-Pasini F. Isolated atrioventricular block of unknown origin in the adult and autoimmunity: diagnostic and therapeutic considerations exemplified by 3 anti-Ro/SSA-associated cases. HeartRhythm Case Rep 2015; 1:293-299. [PMID: 28491571 PMCID: PMC5419527 DOI: 10.1016/j.hrcr.2015.03.019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Key Words
- ANA, Antinuclear antibodies
- AV, Atrioventricular
- AVB, Atrioventricular block
- Anti-Ro/SSA antibodies
- Autoimmunity
- CTD, Connective tissue disease
- Calcium channels
- ECG, Electrocardiogram
- ELISA, Enzyme-linked immunosorbent assay
- FEIA, Fluoroenzyme immunoassay
- III°AVB, Third-degree atrioventricular block
- II°AVB, Second-degree atrioventricular block
- Immunosuppressive therapy
- Isolated heart block in adults
- I°AVB, First-degree atrioventricular block
- anti-Ro/SSA, Anti-Ro/SSA antibody
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Affiliation(s)
- Pietro Enea Lazzerini
- Department of Medical Sciences, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Antonio Brucato
- Department of Internal Medicine, "Papa Giovanni XXIII" Hospital, Bergamo, Italy
| | - Pier Leopoldo Capecchi
- Department of Medical Sciences, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Lucia Baldi
- Department of Heart, Thorax and Vessels, University Hospital of Siena, Siena, Italy
| | - Maria Romana Bacarelli
- Department of Medical Sciences, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Claudia Nucci
- Department of Heart, Thorax and Vessels, University Hospital of Siena, Siena, Italy
| | - Valentina Moscadelli
- Department of Medical Sciences, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Gabriella Morozzi
- Department of Medical Sciences, Surgery and Neurosciences, University of Siena, Siena, Italy
| | - Mohamed Boutjdir
- Research Department, VA New York Harbor Healthcare System, New York, New York.,Departments of Medicine, Cell Biology and Pharmacology, State University of New York at Downstate Medical Center, New York, New York.,Department of Medicine, New York University School of Medicine, New York, New York
| | - Franco Laghi-Pasini
- Department of Medical Sciences, Surgery and Neurosciences, University of Siena, Siena, Italy
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16
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Blessing DR, Montavon M, de Jesus M, Baldi L, Schneider B, Wurm FM, Déglon N. 465. Transient Production of Recombinant Adeno-Associated Virus (AAV) Vectors for Gene Therapy Applications Using Suspension-Adapted HEK 293 Cells in Orbital Shaken Bioreactors. Mol Ther 2015. [DOI: 10.1016/s1525-0016(16)34074-6] [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] Open
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17
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Rossi G, Baldi L, Barbieri F, Bertolini F, Tiseo M. Concomitant EGFR and KRAS mutations in ALK-rearranged lung cancer. Ann Oncol 2015; 26:1035-1036. [DOI: 10.1093/annonc/mdv067] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
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18
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Rajendra Y, Kiseljak D, Baldi L, Wurm FM, Hacker DL. Transcriptional and post-transcriptional limitations of high-yielding, PEI-mediated transient transfection with CHO and HEK-293E cells. Biotechnol Prog 2015; 31:541-9. [DOI: 10.1002/btpr.2064] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2014] [Revised: 01/30/2015] [Indexed: 02/02/2023]
Affiliation(s)
- Yashas Rajendra
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Divor Kiseljak
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Lucia Baldi
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - Florian M. Wurm
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
| | - David L. Hacker
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
- Protein Expression Core Facility (PECF), École Polytechnique Fédérale de Lausanne (EPFL); CH-1015 Lausanne Switzerland
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19
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Esposito M, Serpe FP, Cavallo S, Pellicanò R, Gallo P, Colarusso G, D'ambrosio R, Baldi L, Iovane G, Serpe L. A survey of dioxins (PCDDs and PCDFs) and dioxin-like PCBs in sheep and goat milk from Campania, Italy. Food Addit Contam Part B Surveill 2014; 3:58-63. [PMID: 24785317 DOI: 10.1080/19440040903527350] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
In 2008, after the crisis of buffalo dairy fields in Campania, Italy, an assessment of the contamination of polychlorinated dibenzo-p-dioxins and polychlorinated dibenzofurans (PCDD/Fs) and dioxin-like polychlorinated biphenyls (dl-PCBs) was also necessary for other animal species bred in the region. The contents of PCDDs, polychlorinated dibenzofurans (PCDFs), and dl-PCBs were determined by high-resolution gas chromatography/mass spectrometry (HR-GC/MS) (according to USEPA method 1613) in 69 sheep and goat milk samples from 63 farms. In eleven samples from six sheep farms, the PCDD/Fs levels exceeded the maximum limit of 3.0 pg g(-1) fat established by the European Commission, in particular the concentrations ranged between 3.89 and 12.90 pg g(-1) fat. Statistical treatment of the results for the congener profiles of the non-compliant and compliant samples has been used to identify the sources of contamination.
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Affiliation(s)
- M Esposito
- a Istituto Zooprofilattico Sperimentale del Mezzogiorno
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20
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Pagano M, Tamagnini I, Baldi L, Bisagni A, Ragazzi M, Gardini G, Barbieri F, Cantile F, Nicoli D, Boni C, Rossi G. Immunohistochemical Screening Using Egfr Mutation-Specific Antibodies in Lung Adenocarcinomas: Diamond Project. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu349.97] [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: 11/12/2022] Open
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21
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Memanishvili T, Zavradashvili N, Kupatadze N, Tugushi D, Gverdtsiteli M, Torchilin VP, Wandrey C, Baldi L, Manoli SS, Katsarava R. Arginine-Based Biodegradable Ether–Ester Polymers with Low Cytotoxicity as Potential Gene Carriers. Biomacromolecules 2014; 15:2839-48. [DOI: 10.1021/bm5005977] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tamar Memanishvili
- Institute
of Chemistry and Molecular Engineering, Agricultural University of Georgia, University Campus
at Digomi, David Aghmashenebeli Alley,
13th km, 0159, Tbilisi, Georgia
| | - Nino Zavradashvili
- Institute
of Chemistry and Molecular Engineering, Agricultural University of Georgia, University Campus
at Digomi, David Aghmashenebeli Alley,
13th km, 0159, Tbilisi, Georgia
| | - Nino Kupatadze
- Institute
of Chemistry and Molecular Engineering, Agricultural University of Georgia, University Campus
at Digomi, David Aghmashenebeli Alley,
13th km, 0159, Tbilisi, Georgia
| | - David Tugushi
- Institute
of Chemistry and Molecular Engineering, Agricultural University of Georgia, University Campus
at Digomi, David Aghmashenebeli Alley,
13th km, 0159, Tbilisi, Georgia
| | - Marekh Gverdtsiteli
- Institute
of Chemistry and Molecular Engineering, Agricultural University of Georgia, University Campus
at Digomi, David Aghmashenebeli Alley,
13th km, 0159, Tbilisi, Georgia
| | - Vladimir P. Torchilin
- Center
for Pharmaceutical Biotechnology and Nanomedicine, Northeastern University, Boston, Massachusetts 02115, United States
| | | | | | | | - Ramaz Katsarava
- Institute
of Chemistry and Molecular Engineering, Agricultural University of Georgia, University Campus
at Digomi, David Aghmashenebeli Alley,
13th km, 0159, Tbilisi, Georgia
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22
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Shen X, Hacker DL, Baldi L, Wurm FM. Virus-free transient protein production in Sf9 cells. J Biotechnol 2014; 171:61-70. [DOI: 10.1016/j.jbiotec.2013.11.018] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Revised: 11/25/2013] [Accepted: 11/26/2013] [Indexed: 12/31/2022]
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23
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Nucci EM, Lisi M, Cameli M, Baldi L, Puccetti L, Mondillo S, Favilli R, Lunghetti S. The role of 3D and speckle tracking echocardiography in cardiac amyloidosis: a case report. Eur Rev Med Pharmacol Sci 2014; 18:74-77. [PMID: 24452946] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Cardiac amyloidosis (CA) is a disorder characterized by amyloid fibrils deposition in cardiac interstitium; it results in a restrictive cardiomyopathy with heart failure (HF) and conduction abnormalities. The "gold standard" for diagnosis of CA is myocardial biopsy but possible sampling errors and procedural risks, limit it's use. Magnetic resonance (RMN) offers more information than traditional echocardiography and allows diagnosis of CA but often it's impossible to perform. We report the case of a man with HF and symptomatic bradyarrhythmia that required an urgent pacemaker implant. Echocardiography was strongly suggestive of CA but wasn't impossible to perform an RMN to confirm this hypothesis because the patient was implanted with a definitive pacemaker. So was performed a Speckle Tracking Echocardiography (STE) and a 3D echocardiography: STE allows to differentiate CA from others hypertrophic cardiomyopathy by longitudinal strain value < 12% and 3D echocardiography shows regional left ventricular dyssynchrony with a characteristic temporal pattern of dispersion of regional volume systolic change. On the basis of these results, finally was performed an endomyocardial biopsy that confirmed the diagnosis of CA. This case underlines the importance of news, noninvasive techniques such as eco 3D and STE for early diagnosis of CA, especially when RMN cannot be performed.
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Affiliation(s)
- E M Nucci
- Department of Cardiology, Azienda Ospedaliera Universitaria Senese, Siena, Italy.
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24
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Monteil DT, Bürki CA, Baldi L, Hacker DL, de Jesus M, Wurm FM. The optimization of a rapid low-cost alternative of large-scale medium sterilization. BMC Proc 2013. [PMCID: PMC3980253 DOI: 10.1186/1753-6561-7-s6-p45] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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25
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Shen X, Hacker DL, Baldi L, Wurm FM. Study of the improved Sf9 transient gene expression process. BMC Proc 2013. [PMCID: PMC3980246 DOI: 10.1186/1753-6561-7-s6-p19] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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26
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Hacker DL, Kiseljak D, Rajendra Y, Thurnheer S, Baldi L, Wurm FM. Polyethyleneimine-based transient gene expression processes for suspension-adapted HEK-293E and CHO-DG44 cells. Protein Expr Purif 2013; 92:67-76. [PMID: 24021764 PMCID: PMC7129890 DOI: 10.1016/j.pep.2013.09.001] [Citation(s) in RCA: 58] [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: 08/15/2013] [Revised: 08/30/2013] [Accepted: 09/02/2013] [Indexed: 12/30/2022]
Abstract
A brief overview of principles of TGE using mammalian cells. Description of TGE processes for HEK293 and CHO cells. Description of orbitally shaken bioreactors for suspension cell cultivation. Description of polyethylenime-based transfection processes.
Transient gene expression (TGE) from mammalian cells is an increasingly important tool for the rapid production of recombinant proteins for research applications in biochemistry, structural biology, and biomedicine. Here we review methods for the transfection of human embryo kidney (HEK-293) and Chinese hamster ovary (CHO) cells in suspension culture using the cationic polymer polyethylenimine (PEI) for gene delivery.
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Affiliation(s)
- David L Hacker
- Protein Expression Core Facility, EPFL, CH-1015 Lausanne, Switzerland; Laboratory of Cellular Biotechnology, EPFL, CH-1015 Lausanne, Switzerland.
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27
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Monteil DT, Tontodonati G, Ghimire S, Baldi L, Hacker DL, Bürki CA, Wurm FM. Disposable 600-mL orbitally shaken bioreactor for mammalian cell cultivation in suspension. Biochem Eng J 2013. [DOI: 10.1016/j.bej.2013.04.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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28
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Michel PO, Degen C, Hubert M, Baldi L, Hacker DL, Wurm FM. A NanoDrop-based method for rapid determination of viability decline in suspension cultures of animal cells. Anal Biochem 2012; 430:138-40. [PMID: 22960013 DOI: 10.1016/j.ab.2012.08.028] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2012] [Revised: 08/16/2012] [Accepted: 08/28/2012] [Indexed: 11/19/2022]
Abstract
We describe a rapid method for monitoring the cell growth and decline phases in suspension cultures of animal cells. During the cell growth phase, ultraviolet (UV)-absorbing components in the medium are consumed, but at later times as cells begin to die, UV-absorbing molecules such as proteins are released into the medium. Measuring the absorbance at 280nm (A(280)) with a NanoDrop spectrophotometer, an inverse correlation between the onset of the cell decline phase and A(280) was observed. This simple method can be applied to quickly determine the beginning of the decline phase of cultures of mammalian and insect cells in suspension.
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Affiliation(s)
- Patrik O Michel
- Laboratory of Cellular Biotechnology, École Polytechnique Fédérale de Lausanne (EPFL), School of Life Sciences, CH-1015 Lausanne, Switzerland
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29
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Kadlecova Z, Baldi L, Hacker D, Wurm FM, Klok HA. Comparative Study on the In Vitro Cytotoxicity of Linear, Dendritic, and Hyperbranched Polylysine Analogues. Biomacromolecules 2012; 13:3127-37. [DOI: 10.1021/bm300930j] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Zuzana Kadlecova
- Institut des Matériaux
et Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères, Ecole Polytechnique Fédérale de Lausanne (EPFL), Bâtiment
MXD, Station 12, CH-1015 Lausanne, Switzerland
| | - Lucia Baldi
- Institute of Bioengineering, Laboratory of Cellular Biotechnology, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6,
CH-1015 Lausanne, Switzerland
| | - David Hacker
- Institute of Bioengineering, Laboratory of Cellular Biotechnology, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6,
CH-1015 Lausanne, Switzerland
| | - Florian Maria Wurm
- Institute of Bioengineering, Laboratory of Cellular Biotechnology, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 6,
CH-1015 Lausanne, Switzerland
| | - Harm-Anton Klok
- Institut des Matériaux
et Institut des Sciences et Ingénierie Chimiques, Laboratoire des Polymères, Ecole Polytechnique Fédérale de Lausanne (EPFL), Bâtiment
MXD, Station 12, CH-1015 Lausanne, Switzerland
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30
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Nallet S, Fornelli L, Schmitt S, Parra J, Baldi L, Tsybin YO, Wurm FM. Glycan variability on a recombinant IgG antibody transiently produced in HEK-293E cells. N Biotechnol 2012; 29:471-6. [DOI: 10.1016/j.nbt.2012.02.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Revised: 02/24/2012] [Accepted: 02/25/2012] [Indexed: 10/28/2022]
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31
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Kadlecova Z, Rajendra Y, Matasci M, Hacker D, Baldi L, Wurm FM, Klok HA. Hyperbranched Polylysine: A Versatile, Biodegradable Transfection Agent for the Production of Recombinant Proteins by Transient Gene Expression and the Transfection of Primary Cells. Macromol Biosci 2012; 12:794-804. [DOI: 10.1002/mabi.201100519] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 01/31/2012] [Indexed: 01/08/2023]
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32
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Rajendra Y, Kiseljak D, Manoli S, Baldi L, Hacker DL, Wurm FM. Role of non-specific DNA in reducing coding DNA requirement for transient gene expression with CHO and HEK-293E cells. Biotechnol Bioeng 2012; 109:2271-8. [DOI: 10.1002/bit.24494] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Revised: 01/24/2012] [Accepted: 02/28/2012] [Indexed: 01/20/2023]
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33
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Kadlecova Z, Nallet S, Hacker DL, Baldi L, Klok HA, Wurm FM. Poly(ethyleneimine)-mediated large-scale transient gene expression: influence of molecular weight, polydispersity and N-propionyl groups. Macromol Biosci 2012; 12:628-36. [PMID: 22411776 DOI: 10.1002/mabi.201100404] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2011] [Revised: 12/23/2011] [Indexed: 11/10/2022]
Abstract
Three synthesis lots of linear poly(ethyleneimine) (PEI) are compared to a fully hydrolyzed linear PEI (commercially available as PEI "Max") regarding structure, polyplex formation with plasmid DNA, and transfection of suspension-adapted HEK-293E cells. PEI "Max" binds DNA more efficiently than the other PEIs, but it is the least effective in terms of transient recombinant protein yield. One PEI lot is fractionated by means of SEC. The fractions of high-M(n) PEI are the most efficient for complex formation and transfection. Nevertheless, the highest transient recombinant protein yields are achieved with unfractionated PEI. The results demonstrate that the polydispersity and charge density of linear PEI are important parameters for gene delivery to suspension-adapted HEK-293E cells.
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Affiliation(s)
- Zuzana Kadlecova
- Laboratoire des Polymères, Institut des Matériaux et Institut des Sciences et Ingénieries Chimiques, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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34
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Balasubramanian S, Matasci M, Baldi L, Hacker DL, Wurm FM. Transposon mediated co-integration and co-expression of transgenes in CHO-DG44 cells. BMC Proc 2012; 5 Suppl 8:P32. [PMID: 22373439 PMCID: PMC3284971 DOI: 10.1186/1753-6561-5-s8-p32] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
Affiliation(s)
- Sowmya Balasubramanian
- Laboratory for Cellular Biotechnology (LBTC), Faculty of Life Sciences, École Polytechnique Fédérale de Lausanne CH-1015 Lausanne, Switzerland
| | - Mattia Matasci
- Laboratory for Cellular Biotechnology (LBTC), Faculty of Life Sciences, École Polytechnique Fédérale de Lausanne CH-1015 Lausanne, Switzerland
| | - Lucia Baldi
- Laboratory for Cellular Biotechnology (LBTC), Faculty of Life Sciences, École Polytechnique Fédérale de Lausanne CH-1015 Lausanne, Switzerland
| | - David L Hacker
- Laboratory for Cellular Biotechnology (LBTC), Faculty of Life Sciences, École Polytechnique Fédérale de Lausanne CH-1015 Lausanne, Switzerland
| | - Florian M Wurm
- Laboratory for Cellular Biotechnology (LBTC), Faculty of Life Sciences, École Polytechnique Fédérale de Lausanne CH-1015 Lausanne, Switzerland
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35
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Tissot S, Monteil DT, Baldi L, Hacker DL, Wurm FM. kLa as a predictor for probe-independent mammalian cell bioprocesses in orbitally shaken bioreactors. BMC Proc 2012; 5 Suppl 8:P36. [PMID: 22373050 PMCID: PMC3397689 DOI: 10.1186/1753-6561-5-s8-p36] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Affiliation(s)
- Stéphanie Tissot
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Dominique T Monteil
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Lucia Baldi
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - David L Hacker
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Florian M Wurm
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
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36
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Abstract
The large-scale transfection of mammalian cells allows moderate (milligram to gram) amounts of recombinant proteins (r-proteins) to be obtained for fundamental or clinical research. In this article, we describe a one-liter transfection using polyethyleneimine (PEI) for DNA delivery into human embryonic kidney (HEK-293) cells cultivated in serum-free suspension to produce a recombinant human monoclonal antibody that yields up to about 1 g/L in a 10-day process. The method is based on a DNA delivery step performed at high cell density (20×10(6) cells/mL) by direct addition of DNA and PEI to the culture. Subsequently, the cells are diluted 20-fold for the 10-day production phase in the presence of valproic acid (VPA), a histone deacetylase inhibitor. The methods for plasmid purification, antibody quantification by enzyme-linked immunosorbent assay (ELISA), and affinity purification with protein A are also described.
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Affiliation(s)
- Lucia Baldi
- Laboratory of Cellular Biotechnology, École Polytechnique Fédérale de Lausanne, Lausanne, Switzerland.
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Rajendra Y, Kiseljak D, Baldi L, Hacker DL, Wurm FM. Reduced glutamine concentration improves protein production in growth-arrested CHO-DG44 and HEK-293E cells. Biotechnol Lett 2011. [PMID: 22127760 DOI: 10.1007/s10529‐011‐0809‐z] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Abstract
For most cultivated mammalian cells, glutamine is an essential medium component. However, glutamine consumption results in the production of ammonia, a cytotoxic byproduct. Here we investigated the effect of glutamine reduction on recombinant protein production and ammonia accumulation in transiently transfected CHO and HEK-293E cells maintained under conditions of growth arrest. Maximum transient recombinant protein yields were observed in HEK-293E cultures without glutamine and in CHO cultures with 2 mM glutamine. The initial concentration of glutamine correlated with the level of ammonia accumulation in each culture. For both a stable CHO-derived cell line and a polyclonal population of recombinant CHO cells grown under conditions of mild hypothermia, the highest volumetric protein productivity was observed in cultures without glutamine. Here, the level of ammonia accumulation also corresponded to the initial glutamine concentration. Our data demonstrate that reduction of glutamine in the medium is an effective approach to improve protein production in both transiently and stably transfected mammalian cells when applying conditions that reduce or arrest the growth of these cells.
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Affiliation(s)
- Yashas Rajendra
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédéral de Lausanne (EPFL), 1015, Lausanne, Switzerland
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Affiliation(s)
- Mattia Matasci
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Virginie Bachmann
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Lucia Baldi
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - David L Hacker
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | | | - Florian M Wurm
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland ; ExcellGene SA, CH-1870 Monthey, Switzerland
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39
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Rajendra Y, Kiseljak D, Baldi L, Hacker DL, Wurm FM. Influence of glutamine on transient and stable recombinant protein production in CHO and HEK-293 cells. BMC Proc 2011; 5 Suppl 8:P35. [PMID: 22373018 PMCID: PMC3284955 DOI: 10.1186/1753-6561-5-s8-p35] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Yashas Rajendra
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédéral de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Divor Kiseljak
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédéral de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Lucia Baldi
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédéral de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - David L Hacker
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédéral de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Florian M Wurm
- Laboratory for Cellular Biotechnology (LBTC), École Polytechnique Fédéral de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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40
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Pereira J, Rajendra Y, Baldi L, Hacker DL, Wurm FM. Transient gene expression with CHO cells in conditioned medium: a study using TubeSpin(®) bioreactors. BMC Proc 2011; 5 Suppl 8:P38. [PMID: 22373096 PMCID: PMC3284980 DOI: 10.1186/1753-6561-5-s8-p38] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Affiliation(s)
- João Pereira
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Yashas Rajendra
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Lucia Baldi
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - David L Hacker
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Florian M Wurm
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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41
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Tissot S, Reclari M, Quinodoz S, Dreyer M, Monteil DT, Baldi L, Hacker DL, Farhat M, Discacciati M, Quarteroni A, Wurm FM. Hydrodynamic stress in orbitally shaken bioreactors. BMC Proc 2011; 5 Suppl 8:P39. [PMID: 22373127 PMCID: PMC3284983 DOI: 10.1186/1753-6561-5-s8-p39] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Stéphanie Tissot
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne
| | - Martino Reclari
- Laboratory of Hydraulic Machines, School of Engineering, Ecole Polytechnique Fédérale de Lausanne
| | - Samuel Quinodoz
- Chair of Modeling and Scientific Computing, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Matthieu Dreyer
- Laboratory of Hydraulic Machines, School of Engineering, Ecole Polytechnique Fédérale de Lausanne
| | - Dominique T Monteil
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne
| | - Lucia Baldi
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne
| | - David L Hacker
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne
| | - Mohamed Farhat
- Laboratory of Hydraulic Machines, School of Engineering, Ecole Polytechnique Fédérale de Lausanne
| | - Marco Discacciati
- Chair of Modeling and Scientific Computing, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Alfio Quarteroni
- Chair of Modeling and Scientific Computing, School of Basic Sciences, Ecole Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
| | - Florian M Wurm
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne
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42
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Matasci M, Bachmann V, Baldi L, Hacker DL, De Jesus M, Wurm FM. Rapid recombinant protein production from pools of transposon-generated CHO cells. BMC Proc 2011; 5 Suppl 8:P34. [PMID: 22373498 PMCID: PMC3285008 DOI: 10.1186/1753-6561-5-s8-p34] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Affiliation(s)
- Mattia Matasci
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Virginie Bachmann
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Lucia Baldi
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - David L Hacker
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | | | - Florian M Wurm
- Laboratory of Cellular Biotechnology, Faculty of Life Sciences, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland ; ExcellGene SA, CH-1870 Monthey, Switzerland
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43
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Kiseljak D, Rajendra Y, Manoli SS, Baldi L, Hacker DL, Wurm FM. The use of filler DNA for improved transfection and reduced DNA needs in transient gene expression with CHO and HEK cells. BMC Proc 2011; 5 Suppl 8:P33. [PMID: 22373474 PMCID: PMC3285026 DOI: 10.1186/1753-6561-5-s8-p33] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Divor Kiseljak
- Laboratory for Cellular Biotechnology, Faculty of Life Sciences, École Polytechnique Fédéral de Lausanne, CH-1015 Lausanne, Switzerland
| | - Yashas Rajendra
- Laboratory for Cellular Biotechnology, Faculty of Life Sciences, École Polytechnique Fédéral de Lausanne, CH-1015 Lausanne, Switzerland
| | - Sagar S Manoli
- Laboratory for Cellular Biotechnology, Faculty of Life Sciences, École Polytechnique Fédéral de Lausanne, CH-1015 Lausanne, Switzerland
| | - Lucia Baldi
- Laboratory for Cellular Biotechnology, Faculty of Life Sciences, École Polytechnique Fédéral de Lausanne, CH-1015 Lausanne, Switzerland
| | - David L Hacker
- Laboratory for Cellular Biotechnology, Faculty of Life Sciences, École Polytechnique Fédéral de Lausanne, CH-1015 Lausanne, Switzerland
| | - Florian M Wurm
- Laboratory for Cellular Biotechnology, Faculty of Life Sciences, École Polytechnique Fédéral de Lausanne, CH-1015 Lausanne, Switzerland
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44
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Tissot S, Oberbek A, Reclari M, Dreyer M, Hacker DL, Baldi L, Farhat M, Wurm FM. Efficient and reproducible mammalian cell bioprocesses without probes and controllers? N Biotechnol 2011; 28:382-90. [DOI: 10.1016/j.nbt.2011.02.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Revised: 02/04/2011] [Accepted: 02/14/2011] [Indexed: 11/16/2022]
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Matasci M, Baldi L, Hacker DL, Wurm FM. The PiggyBac transposon enhances the frequency of CHO stable cell line generation and yields recombinant lines with superior productivity and stability. Biotechnol Bioeng 2011; 108:2141-50. [DOI: 10.1002/bit.23167] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2010] [Revised: 03/14/2011] [Accepted: 03/30/2011] [Indexed: 12/17/2022]
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Xie Q, Michel PO, Baldi L, Hacker DL, Zhang X, Wurm FM. TubeSpin bioreactor 50 for the high-density cultivation of Sf-9 insect cells in suspension. Biotechnol Lett 2011; 33:897-902. [DOI: 10.1007/s10529-011-0527-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2010] [Accepted: 12/23/2010] [Indexed: 10/18/2022]
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Werner S, Eibl R, Lettenbauer C, Röll M, Eibl D, De Jesus M, Zhang X, Stettler M, Tissot S, Bürkie C, Broccard G, Kühner M, Tanner R, Baldi L, Hacker D, Wurm FM. Innovative, Non-stirred Bioreactors in Scales from Milliliters up to 1000 Liters for Suspension Cultures of Cells using Disposable Bags and Containers – A Swiss Contribution. Chimia (Aarau) 2010; 64:819-23. [DOI: 10.2533/chimia.2010.819] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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48
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Wulhfard S, Baldi L, Hacker DL, Wurm F. Valproic acid enhances recombinant mRNA and protein levels in transiently transfected Chinese hamster ovary cells. J Biotechnol 2010; 148:128-32. [DOI: 10.1016/j.jbiotec.2010.05.003] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Revised: 03/29/2010] [Accepted: 05/14/2010] [Indexed: 11/16/2022]
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49
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Esposito M, Cavallo S, Serpe FP, D'Ambrosio R, Gallo P, Colarusso G, Pellicanò R, Baldi L, Guarino A, Serpe L. Levels and congener profiles of polychlorinated dibenzo-p-dioxins, polychlorinated dibenzofurans and dioxin-like polychlorinated biphenyls in cow's milk collected in Campania, Italy. Chemosphere 2009; 77:1212-6. [PMID: 19836049 DOI: 10.1016/j.chemosphere.2009.09.011] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Revised: 08/28/2009] [Accepted: 09/03/2009] [Indexed: 05/20/2023]
Abstract
Polychlorinated dibenzo-p-dioxins (PCDDs), polychlorinated dibenzofurans (PCDFs) and certain dioxin-like polychlorinated biphenyls (dl-PCBs) are a family of chemically-related lipophilic compounds characterized by similar toxicity. Due to their properties they are universally distributed in the environment and classified as persistent organic pollutants (POPs). From most of studies carried out to evaluate human dietary intake, milk and dairy products result as a major contributors of PCDD/Fs uptake. Of course the main source of milk contamination is animal feeds. Lactating ruminants, cows included, transfer these compounds to the food chain by ingestion of contaminated vegetables or soil. Their resistance to degradation and a high lipophilicity means that PCDD/Fs and dl-PCBs may be accumulated into fat tissues from which they are transferred to milk during lactation period. Seventy-nine cows milk samples, collected in the monitoring plan 2008, were analyzed for PCDD/Fs and dl-PCBs. Eleven milk samples were non-compliant corresponding to five breeding livestock located in Caserta province. The distribution of PCDD/Fs and dl-PCBs congeners in these samples was examined in order to determine the likely sources of dioxins. The results show that the congener profile is characterized by a prevalence of PCDFs in respect of PCDDs, that represents the typical pattern of thermal origin contamination.
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Affiliation(s)
- M Esposito
- Istituto Zooprofilattico Sperimentale del Mezzogiorno-Portici, Italy.
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50
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Nallet S, Amacker M, Westerfeld N, Baldi L, König I, Hacker DL, Zaborosch C, Zurbriggen R, Wurm FM. Respiratory syncytial virus subunit vaccine based on a recombinant fusion protein expressed transiently in mammalian cells. Vaccine 2009; 27:6415-9. [PMID: 19559121 DOI: 10.1016/j.vaccine.2009.06.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Although respiratory syncytial virus (RSV) causes severe lower respiratory tract infection in infants and adults at risk, no RSV vaccine is currently available. In this report, efforts toward the generation of an RSV subunit vaccine using recombinant RSV fusion protein (rRSV-F) are described. The recombinant protein was produced by transient gene expression (TGE) in suspension-adapted human embryonic kidney cells (HEK-293E) in 4 L orbitally shaken bioreactors. It was then purified and formulated in immunostimulating reconstituted influenza virosomes (IRIVs). The candidate vaccine induced anti-RSV-F neutralizing antibodies in mice, and challenge studies in cotton rats are ongoing. If successful in preclinical and clinical trials, this will be the first recombinant subunit vaccine produced by large-scale TGE in mammalian cells.
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Affiliation(s)
- Sophie Nallet
- Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Bioengineering, Laboratory of Cellular Biotechnology, CH-1015 Lausanne, Switzerland
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