1
|
Oliveira Orsi R, Zaluski R, de Barros LC, Barraviera B, Pimenta DC, Ferreira Junior RS. Standardized guidelines for Africanized honeybee venom production needed for development of new apilic antivenom. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2024; 27:73-90. [PMID: 38247328 DOI: 10.1080/10937404.2023.2300786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Africanized bees have spread across the Americas since 1956 and consequently resulted in human and animal deaths attributed to massive attacks related to exposure from Argentina to the USA. In Brazil, more than 100,000 accidents were registered in the last 5 years with a total of 303 deaths. To treat such massive attacks, Brazilian researchers developed the first specific antivenom against Africanized honey bee sting exposure. This unique product, the first of its kind in the world, has been safely tested in 20 patients during a Phase 2 clinical trial. To develop the antivenom, a standardized process was undertaken to extract primary venom antigens from the Africanized bees for immunization of serum-producing horses. This process involved extracting, purifying, fractionating, characterizing, and identifying the venom (apitoxin) employing mass spectrometry to generate standardized antigen for hyperimmunization of horses using the major toxins (melittin and its isoforms and phospholipase A2). The current guide describes standardization of the entire production chain of venom antigens in compliance with good manufacturing practices (GMP) required by regulatory agencies. Emphasis is placed upon the welfare of bees and horses during this process, as well as the development of a new biopharmaceutical to ultimately save lives.
Collapse
Affiliation(s)
- Ricardo Oliveira Orsi
- College of Veterinary Medicine and Animal Sciences (FMVZ), São Paulo State University (UNESP), Botucatu, Brazil
- Graduate Program in Animal Science, College of Veterinary Medicine, and Animal Sciences (FMVZ), São Paulo State University (UNESP), Botucatu, Brazil
| | - Rodrigo Zaluski
- Faculty of Veterinary Medicine and Animal Science, Federal University of Mato Grosso do Sul (UFMS), Campo Grande, Brazil
| | - Luciana Curtolo de Barros
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP), Botucatu, Brazil
| | - Benedito Barraviera
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP), Botucatu, Brazil
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, Brazil
- Graduate Program in Clinical Research, Botucatu Medical School (FMB) and CEVAP, São Paulo State University (UNESP), Botucatu, Brazil
| | - Daniel Carvalho Pimenta
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, Brazil
- Laboratory of Biochemistry and Biophysics, Butantan Institute (BI), São Paulo, Brazil
| | - Rui Seabra Ferreira Junior
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP), Botucatu, Brazil
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP), Botucatu, Brazil
- Graduate Program in Clinical Research, Botucatu Medical School (FMB) and CEVAP, São Paulo State University (UNESP), Botucatu, Brazil
| |
Collapse
|
2
|
Deng DK, Zhang JJ, Gan D, Zou JK, Wu RX, Tian Y, Yin Y, Li X, Chen FM, He XT. Roles of extracellular vesicles in periodontal homeostasis and their therapeutic potential. J Nanobiotechnology 2022; 20:545. [PMID: 36585740 PMCID: PMC9801622 DOI: 10.1186/s12951-022-01757-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 12/23/2022] [Indexed: 01/01/2023] Open
Abstract
Periodontal tissue is a highly dynamic and frequently stimulated area where homeostasis is easily destroyed, leading to proinflammatory periodontal diseases. Bacteria-bacteria and cell-bacteria interactions play pivotal roles in periodontal homeostasis and disease progression. Several reviews have comprehensively summarized the roles of bacteria and stem cells in periodontal homeostasis. However, they did not describe the roles of extracellular vesicles (EVs) from bacteria and cells. As communication mediators evolutionarily conserved from bacteria to eukaryotic cells, EVs secreted by bacteria or cells can mediate interactions between bacteria and their hosts, thereby offering great promise for the maintenance of periodontal homeostasis. This review offers an overview of EV biogenesis, the effects of EVs on periodontal homeostasis, and recent advances in EV-based periodontal regenerative strategies. Specifically, we document the pathogenic roles of bacteria-derived EVs (BEVs) in periodontal dyshomeostasis, focusing on plaque biofilm formation, immune evasion, inflammatory pathway activation and tissue destruction. Moreover, we summarize recent advancements in cell-derived EVs (CEVs) in periodontal homeostasis, emphasizing the multifunctional biological effects of CEVs on periodontal tissue regeneration. Finally, we discuss future challenges and practical perspectives for the clinical translation of EV-based therapies for periodontitis.
Collapse
Affiliation(s)
- Dao-Kun Deng
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Jiu-Jiu Zhang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Dian Gan
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Jie-Kang Zou
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Rui-Xin Wu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Yi Tian
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Yuan Yin
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China
| | - Xuan Li
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China.
| | - Fa-Ming Chen
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China.
| | - Xiao-Tao He
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Department of Periodontology, School of Stomatology, The Fourth Military Medical University, Xi'an, People's Republic of China.
| |
Collapse
|
3
|
Suri K, D'Souza A, Huang D, Bhavsar A, Amiji M. Bacterial extracellular vesicle applications in cancer immunotherapy. Bioact Mater 2022; 22:551-566. [PMID: 36382022 PMCID: PMC9637733 DOI: 10.1016/j.bioactmat.2022.10.024] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 10/10/2022] [Accepted: 10/22/2022] [Indexed: 12/03/2022] Open
Abstract
Cancer therapy is undergoing a paradigm shift toward immunotherapy focusing on various approaches to activate the host immune system. As research to identify appropriate immune cells and activate anti-tumor immunity continues to expand, scientists are looking at microbial sources given their inherent ability to elicit an immune response. Bacterial extracellular vesicles (BEVs) are actively studied to control systemic humoral and cellular immune responses instead of using whole microorganisms or other types of extracellular vesicles (EVs). BEVs also provide the opportunity as versatile drug delivery carriers. Unlike mammalian EVs, BEVs have already made it to the clinic with the meningococcal vaccine (Bexsero®). However, there are still many unanswered questions in the use of BEVs, especially for chronic systemically administered immunotherapies. In this review, we address the opportunities and challenges in the use of BEVs for cancer immunotherapy and provide an outlook towards development of BEV products that can ultimately translate to the clinic.
Collapse
Affiliation(s)
- Kanika Suri
- Department of Bioengineering, College of Engineering, Northeastern University, Boston, MA, 02115, USA
| | - Anisha D'Souza
- Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University, Boston, MA, 02115, USA,Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, 20115, USA
| | - Di Huang
- Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University, Boston, MA, 02115, USA,Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, 20115, USA
| | - Aashray Bhavsar
- Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University, Boston, MA, 02115, USA
| | - Mansoor Amiji
- Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University, Boston, MA, 02115, USA,Department of Chemical Engineering, College of Engineering, Northeastern University, Boston, MA, 02115, USA,Corresponding author. Department of Pharmaceutical Sciences, School of Pharmacy, Northeastern University, Boston, MA, 02115, USA.
| |
Collapse
|
4
|
Shen Q, Xu B, Wang C, Xiao Y, Jin Y. Bacterial membrane vesicles in inflammatory bowel disease. Life Sci 2022; 306:120803. [PMID: 35850249 DOI: 10.1016/j.lfs.2022.120803] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Revised: 07/01/2022] [Accepted: 07/10/2022] [Indexed: 12/20/2022]
Abstract
Inflammatory bowel disease (IBD) is characterized by chronic intestinal inflammation with no cure. The intestine is fundamental in controlling human health. Disruption of the microbial ecosystem in the intestine is considered an important cause of IBD. The interaction between the host and microbiota significantly impacts the intestinal epithelial barrier and immune function. Bacterial membrane vesicles (MVs) are vital participants in bacteria-bacteria and host-microbiota communication. Currently, MVs have been found to exhibit many important regulating effects for intestinal microecology and have excellent application potential in clinical disease therapies. In the present review, we review the current knowledge on MVs, and specifically focus on gut bacterial MVs and their roles in the IBD. In addition, we summarized the potential utility of MVs as a novel therapeutic approach in IBD patients.
Collapse
Affiliation(s)
- Qichen Shen
- Department of Biotechnology, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Bingbai Xu
- SUNNY Biotech Hangzhou, Hangzhou 310012, China
| | - Caihong Wang
- Department of Biotechnology, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China
| | - Yingping Xiao
- State Key Laboratory for Managing Biotic and Chemical Threats to the Quality and Safety of Agro-Products, Institute of Agro-Product Safety and Nutrition, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China.
| | - Yuanxiang Jin
- Department of Biotechnology, College of Biotechnology and Bioengineering, Zhejiang University of Technology, Hangzhou 310032, China.
| |
Collapse
|
5
|
Gilmore WJ, Johnston EL, Zavan L, Bitto NJ, Kaparakis-Liaskos M. Immunomodulatory roles and novel applications of bacterial membrane vesicles. Mol Immunol 2021; 134:72-85. [PMID: 33725501 DOI: 10.1016/j.molimm.2021.02.027] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 02/15/2021] [Accepted: 02/24/2021] [Indexed: 12/19/2022]
Abstract
Bacteria release extracellular vesicles (EVs) known as bacterial membrane vesicles (BMVs) during their normal growth. Gram-negative bacteria produce BMVs termed outer membrane vesicles (OMVs) that are composed of a range of biological cargo and facilitate numerous bacterial functions, including promoting pathogenesis and mediating disease in the host. By contrast, less is understood about BMVs produced by Gram-positive bacteria, which are referred to as membrane vesicles (MVs), however their contribution to mediating bacterial pathogenesis has recently become evident. In this review, we summarise the mechanisms whereby BMVs released by Gram-negative and Gram-positive bacteria are produced, in addition to discussing their key functions in promoting bacterial survival, mediating pathogenesis and modulating host immune responses. Furthermore, we discuss the mechanisms whereby BMVs produced by both commensal and pathogenic organisms can enter host cells and interact with innate immune receptors, in addition to how they modulate host innate and adaptive immunity to promote immunotolerance or drive the onset and progression of disease. Finally, we highlight current and emerging applications of BMVs in vaccine design, biotechnology and cancer therapeutics.
Collapse
Affiliation(s)
- William J Gilmore
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia; Research Centre for Extracellular Vesicles, School of Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Ella L Johnston
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia; Research Centre for Extracellular Vesicles, School of Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Lauren Zavan
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia; Research Centre for Extracellular Vesicles, School of Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Natalie J Bitto
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia; Research Centre for Extracellular Vesicles, School of Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Maria Kaparakis-Liaskos
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia; Research Centre for Extracellular Vesicles, School of Molecular Science, La Trobe University, Melbourne, VIC, Australia.
| |
Collapse
|
6
|
Santos L, Oliveira C, Vasconcelos BM, Vilela D, Melo L, Ambrósio L, da Silva A, Murback L, Kurissio J, Cavalcante J, Cassaro CV, Barros L, Barraviera B, Ferreira RS. Good management practices of venomous snakes in captivity to produce biological venom-based medicines: achieving replicability and contributing to pharmaceutical industry. JOURNAL OF TOXICOLOGY AND ENVIRONMENTAL HEALTH. PART B, CRITICAL REVIEWS 2021; 24:30-50. [PMID: 33308037 DOI: 10.1080/10937404.2020.1855279] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
One of the factors responsible for lack of reproducible findings may be attributed to the raw material used. To date, there are no apparent studies examining reproducibility using venoms for the development of new toxin-based drugs with respect to regulatory agencies' policies. For this reason, protocols were implemented to produce animal toxins with quality, traceability, and strict compliance with Good Manufacturing Practices. This required validation of the production chain from the arrival of the animal to the vivarium, followed by handling, housing, as well as compliance with respect to extraction, freeze-drying, and, finally, storage protocols, aimed at generating compounds to serve as candidate molecules applicable in clinical trials. Currently, to produce quality snake venoms to support reproductive studies, the Center for the Study of Venoms and Venomous Animals (CEVAP) from São Paulo State University (UNESP), São Paulo, Brazil has 449 microchipped snakes through rigid and standardized operating procedures for safety, health, and welfare of animals. Snakes were frequently subjected to vet clinical examination, anthelmintic, and antiparasitic treatment. Venom milk used to destroy prey was collected from each animal in individual plastic microtubes to avoid contamination and for traceability. In addition, venoms were submitted to microbiological, and biochemical toxicological analyses. It is noteworthy that investigators are responsible for caring, maintaining, and manipulating snakes and ensuring their health in captivity. This review aimed to contribute to the pharmaceutical industry the experimental experience and entire snake venom production chain required to generate quality products for therapeutic human consumption.
Collapse
Affiliation(s)
- Lucilene Santos
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP) , Botucatu, Brazil
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP) , Botucatu, Brazil
- Graduate Program in Clinical Research, Botucatu Medical School (FMB) and CEVAP, São Paulo State University (UNESP) , Botucatu, Brazil
| | - Cristiano Oliveira
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP) , Botucatu, Brazil
| | - Barbara Marques Vasconcelos
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP) , Botucatu, Brazil
| | - Daniela Vilela
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP) , Botucatu, Brazil
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP) , Botucatu, Brazil
| | - Leonardo Melo
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP) , Botucatu, Brazil
- Graduate Program in Clinical Research, Botucatu Medical School (FMB) and CEVAP, São Paulo State University (UNESP) , Botucatu, Brazil
| | - Lívia Ambrósio
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP) , Botucatu, Brazil
| | - Amanda da Silva
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP) , Botucatu, Brazil
| | - Leticia Murback
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP) , Botucatu, Brazil
| | - Jacqueline Kurissio
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP) , Botucatu, Brazil
| | - Joeliton Cavalcante
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP) , Botucatu, Brazil
| | - Claudia Vilalva Cassaro
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP) , Botucatu, Brazil
| | - Luciana Barros
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP) , Botucatu, Brazil
| | - Benedito Barraviera
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP) , Botucatu, Brazil
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP) , Botucatu, Brazil
- Graduate Program in Clinical Research, Botucatu Medical School (FMB) and CEVAP, São Paulo State University (UNESP) , Botucatu, Brazil
| | - Rui Seabra Ferreira
- Center for the Study of Venoms and Venomous Animals (CEVAP), São Paulo State University (UNESP) , Botucatu, Brazil
- Graduate Program in Tropical Diseases, Botucatu Medical School (FMB), São Paulo State University (UNESP) , Botucatu, Brazil
- Graduate Program in Clinical Research, Botucatu Medical School (FMB) and CEVAP, São Paulo State University (UNESP) , Botucatu, Brazil
| |
Collapse
|
7
|
Abstract
The release of extracellular vesicles (EVs) is a process conserved across the three domains of life. Amongst prokaryotes, EVs produced by Gram-negative bacteria, termed outer membrane vesicles (OMVs), were identified more than 50 years ago and a wealth of literature exists regarding their biogenesis, composition and functions. OMVs have been implicated in benefiting numerous metabolic functions of their parent bacterium. Additionally, OMVs produced by pathogenic bacteria have been reported to contribute to pathology within the disease setting. By contrast, the release of EVs from Gram-positive bacteria, known as membrane vesicles (MVs), has only been widely accepted within the last decade. As such, there is a significant disproportion in knowledge regarding MVs compared to OMVs. Here we provide an overview of the literature regarding bacterial membrane vesicles (BMVs) produced by pathogenic and commensal bacteria. We highlight the mechanisms of BMV biogenesis and their roles in assisting bacterial survival, in addition to discussing their functions in promoting disease pathologies and their potential use as novel therapeutic strategies.
Collapse
Affiliation(s)
- William J Gilmore
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia
- Research Centre for Extracellular Vesicles, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Natalie J Bitto
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia
- Research Centre for Extracellular Vesicles, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia
| | - Maria Kaparakis-Liaskos
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, Australia.
- Research Centre for Extracellular Vesicles, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, Australia.
| |
Collapse
|
8
|
Gerritzen MJH, Stangowez L, van de Waterbeemd B, Martens DE, Wijffels RH, Stork M. Continuous production of Neisseria meningitidis outer membrane vesicles. Appl Microbiol Biotechnol 2019; 103:9401-9410. [PMID: 31676919 PMCID: PMC6867985 DOI: 10.1007/s00253-019-10163-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 09/10/2019] [Accepted: 09/28/2019] [Indexed: 12/11/2022]
Abstract
Outer membrane vesicles (OMVs) are nanoparticles secreted by Gram-negative bacteria that can be used for diverse biotechnological applications. Interesting applications have been developed, where OMVs are the basis of drug delivery, enzyme carriers, adjuvants, and vaccines. Historically, OMV research has mainly focused on vaccines. Therefore, current OMV production processes have been based on batch processes. The production of OMVs in batch mode is characterized by relatively low yields and high costs. Transition of OMV production processes from batch to continuous processes could increase the volumetric productivity, reduce the production and capital costs, and result in a higher quality product. Here, we study the continuous production of Neisseria meningitidis OMVs to improve volumetric productivity. Continuous cultivation of N. meningitidis resulted in a steady state with similar high OMV concentrations as are reached in current batch processes. The steady state was reproducible and could be maintained for at least 600 h. The volumetric productivity of a continuous culture reached 4.0 × 1014 OMVs per liter culture per day, based on a dilution rate of 1/day. The tested characteristics of the OMVs did not change during the experiments showing feasibility of a continuous production process for the production of OMVs for any application.
Collapse
Affiliation(s)
- Matthias J H Gerritzen
- Institute for Translational Vaccinology (Intravacc), Process Development Bacterial Vaccines, P.O. Box 450, 3720, AL, Bilthoven, The Netherlands
- Bioprocess Engineering, Wageningen University, P.O. Box 16, 6700, AA, Wageningen, The Netherlands
| | - Lilli Stangowez
- Institute for Translational Vaccinology (Intravacc), Process Development Bacterial Vaccines, P.O. Box 450, 3720, AL, Bilthoven, The Netherlands
| | - Bas van de Waterbeemd
- Institute for Translational Vaccinology (Intravacc), Process Development Bacterial Vaccines, P.O. Box 450, 3720, AL, Bilthoven, The Netherlands
- Dept. Drug Substance Development, Janssen Vaccines and Prevention, Archimedesweg 4-6, 2333, CN, Leiden, The Netherlands
| | - Dirk E Martens
- Bioprocess Engineering, Wageningen University, P.O. Box 16, 6700, AA, Wageningen, The Netherlands
| | - René H Wijffels
- Bioprocess Engineering, Wageningen University, P.O. Box 16, 6700, AA, Wageningen, The Netherlands
- Faculty of Biosciences and Aquaculture, Nord University, P.O. Box 1409, 8049, Bodø, Norway
| | - Michiel Stork
- Institute for Translational Vaccinology (Intravacc), Process Development Bacterial Vaccines, P.O. Box 450, 3720, AL, Bilthoven, The Netherlands.
| |
Collapse
|
9
|
Gerritzen MJH, Maas RHW, van den Ijssel J, van Keulen L, Martens DE, Wijffels RH, Stork M. High dissolved oxygen tension triggers outer membrane vesicle formation by Neisseria meningitidis. Microb Cell Fact 2018; 17:157. [PMID: 30285743 PMCID: PMC6171317 DOI: 10.1186/s12934-018-1007-7] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2018] [Accepted: 09/26/2018] [Indexed: 02/06/2023] Open
Abstract
Background Outer membrane vesicles (OMVs) are nanoparticles released by Gram-negative bacteria and can be used as vaccines. Often, detergents are used to promote release of OMVs and to remove the toxic lipopolysaccharides. Lipopolysaccharides can be detoxified by genetic modification such that vesicles spontaneously produced by bacteria can be directly used as vaccines. The use of spontaneous OMVs has the advantage that no separate extraction step is required in the purification process. However, the productivity of spontaneous OMVs by bacteria at optimal growth conditions is low. One of many methods for increasing OMV formation is to reduce the linkage of the outer membrane to the peptidoglycan layer by knocking out the rmpM gene. A previous study showed that for Neisseria meningitidis this resulted in release of more OMVs. Furthermore, cysteine depletion was found to trigger OMV release and at the same time cause reduced growth and oxidative stress responses. Here we study the effect of growth rate and oxidative stress on OMV release. Results First, we identified using chemostat and accelerostat cultures of N. meningitidis that increasing the growth rate from 0.03 to 0.18 h−1 has a limited effect on OMV productivity. Thus, we hypothesized that oxidative stress is the trigger for OMV release and that oxidative stress can be introduced directly by increasing the dissolved oxygen tension of bacterial cultures. Slowly increasing oxygen concentrations in a N. meningitidis changestat showed that an increase from 30 to 150% air saturation improved OMV productivity four-fold. Batch cultures controlled at 100% air saturation increased OMV productivity three-fold over batch cultures controlled at 30% air saturation. Conclusion Increased dissolved oxygen tension induces the release of outer membrane vesicles in N. meningitidis cultures. Since oxygen concentration is a well-controlled process parameter of bacterial cultures, this trigger can be applied as a convenient process parameter to induce OMV release in bacterial cultures. Improved productivity of OMVs not only improves the production costs of OMVs as vaccines, it also facilitates the use of OMVs as adjuvants, enzyme carriers, or cell-specific drug delivery vehicles. Electronic supplementary material The online version of this article (10.1186/s12934-018-1007-7) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Matthias J H Gerritzen
- Process Development Bacterial Vaccines, Institute for Translational Vaccinology (Intravacc), P.O. Box 450, 3720 AL, Bilthoven, The Netherlands.,Bioprocess Engineering, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands
| | - Ronald H W Maas
- Process Development Bacterial Vaccines, Institute for Translational Vaccinology (Intravacc), P.O. Box 450, 3720 AL, Bilthoven, The Netherlands
| | - Jan van den Ijssel
- Process Development Bacterial Vaccines, Institute for Translational Vaccinology (Intravacc), P.O. Box 450, 3720 AL, Bilthoven, The Netherlands
| | - Lonneke van Keulen
- Process Development Bacterial Vaccines, Institute for Translational Vaccinology (Intravacc), P.O. Box 450, 3720 AL, Bilthoven, The Netherlands
| | - Dirk E Martens
- Bioprocess Engineering, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands
| | - René H Wijffels
- Bioprocess Engineering, Wageningen University, P.O. Box 16, 6700 AA, Wageningen, The Netherlands.,Faculty of Biosciences and Aquaculture, Nord University, P.O. Box 1409, 8049, Bodø, Norway
| | - Michiel Stork
- Process Development Bacterial Vaccines, Institute for Translational Vaccinology (Intravacc), P.O. Box 450, 3720 AL, Bilthoven, The Netherlands.
| |
Collapse
|
10
|
Tan K, Li R, Huang X, Liu Q. Outer Membrane Vesicles: Current Status and Future Direction of These Novel Vaccine Adjuvants. Front Microbiol 2018; 9:783. [PMID: 29755431 PMCID: PMC5932156 DOI: 10.3389/fmicb.2018.00783] [Citation(s) in RCA: 120] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 04/06/2018] [Indexed: 02/03/2023] Open
Abstract
Adjuvants have been of great interest to vaccine formulation as immune-stimulators. Prior to the recent research in the field of immune stimulation, conventional adjuvants utilized for aluminum-based vaccinations dominated the adjuvant market. However, these conventional adjuvants have demonstrated obvious defects, including poor protective efficiency and potential side effects, which hindered their widespread circulation. Outer membrane vesicles (OMVs) naturally exist in gram-negative bacteria and are capable of engaging innate and adaptive immunity and possess intrinsic adjuvant capacity. They have shown tremendous potential for adjuvant application and have recently been successfully applied in various vaccine platforms. Adjuvants could be highly effective with the introduction of OMVs, providing complete immunity and with the benefits of low toxicity; further, OMVs might also be designed as an advanced mucosal delivery vehicle for use as a vaccine carrier. In this review, we discuss adjuvant development, and provide an overview of novel OMV adjuvants and delivery vehicles. We also suggest future directions for adjuvant research. Overall, we believe that OMV adjuvants would find high value in vaccine formulation in the future.
Collapse
Affiliation(s)
| | | | | | - Qiong Liu
- Department of Medical Microbiology, School of Medicine, Nanchang University, Nanchang, China
| |
Collapse
|
11
|
Abstract
The therapeutic potential of extracellular vesicles from eukaryotes has gained strong interest in recent years. However, research into the therapeutic application of their bacterial counterparts, known as bacterial membrane vesicles, is only just beginning to be appreciated. Membrane vesicles (MVs) from both Gram-positive and Gram-negative bacteria offer significant advantages in therapeutic development, including large-scale, cost effective production and ease of molecular manipulation to display foreign antigens. The nanoparticle size of MVs enables their dissemination through numerous tissue types, and their natural immunogenicity and self-adjuvanting capability can be harnessed to induce both cell-mediated and humoral immunity in vaccine design. Moreover, the ability to target MVs to specific tissues through the display of surface receptors raises their potential use as targeted MV-based anti-cancer therapy. This review discusses recent advances in MV research with particular emphasis on exciting new possibilities for the application of MVs in therapeutic design.
Collapse
Affiliation(s)
- Natalie J Bitto
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Melbourne, Victoria 3086, Australia.
| | - Maria Kaparakis-Liaskos
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Bundoora, Melbourne, Victoria 3086, Australia.
- Centre for Innate Immunity and Infectious Diseases, Hudson Institute of Medical Research, Monash University, Melbourne, Victoria 3068, Australia.
| |
Collapse
|
12
|
Unrean P. Bioprocess modelling for the design and optimization of lignocellulosic biomass fermentation. BIORESOUR BIOPROCESS 2016. [DOI: 10.1186/s40643-015-0079-z] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
|
13
|
van der Pol L, Stork M, van der Ley P. Outer membrane vesicles as platform vaccine technology. Biotechnol J 2015; 10:1689-706. [PMID: 26912077 PMCID: PMC4768646 DOI: 10.1002/biot.201400395] [Citation(s) in RCA: 248] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 08/13/2015] [Accepted: 09/24/2015] [Indexed: 12/31/2022]
Abstract
Outer membrane vesicles (OMVs) are released spontaneously during growth by many Gram-negative bacteria. They present a range of surface antigens in a native conformation and have natural properties like immunogenicity, self-adjuvation and uptake by immune cells which make them attractive for application as vaccines against pathogenic bacteria. In particular with Neisseria meningitidis, they have been investigated extensively and an OMV-containing meningococcal vaccine has recently been approved by regulatory agencies. Genetic engineering of the OMV-producing bacteria can be used to improve and expand their usefulness as vaccines. Recent work on meningitis B vaccines shows that OMVs can be modified, such as for lipopolysaccharide reactogenicity, to yield an OMV product that is safe and effective. The overexpression of crucial antigens or simultaneous expression of multiple antigenic variants as well as the expression of heterologous antigens enable expansion of their range of applications. In addition, modifications may increase the yield of OMV production and can be combined with specific production processes to obtain high amounts of well-defined, stable and uniform OMV particle vaccine products. Further improvement can facilitate the development of OMVs as platform vaccine product for multiple applications.
Collapse
Affiliation(s)
| | - Michiel Stork
- Product Development, Intravacc, Bilthoven, The Netherlands
| | | |
Collapse
|
14
|
Brazilian meningococcal C conjugate vaccine: Scaling up studies. Vaccine 2015; 33:4281-7. [DOI: 10.1016/j.vaccine.2015.03.097] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Revised: 02/21/2015] [Accepted: 03/24/2015] [Indexed: 11/21/2022]
|
15
|
van Eikenhorst G, Thomassen YE, van der Pol LA, Bakker WAM. Assessment of mass transfer and mixing in rigid lab-scale disposable bioreactors at low power input levels. Biotechnol Prog 2014; 30:1269-76. [DOI: 10.1002/btpr.1981] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 08/07/2014] [Indexed: 11/09/2022]
Affiliation(s)
- Gerco van Eikenhorst
- Inst. for Translational Vaccinology (Intravacc, process development); P.O. Box 450, 3720 AL Bilthoven The Netherlands
| | - Yvonne E. Thomassen
- Inst. for Translational Vaccinology (Intravacc, process development); P.O. Box 450, 3720 AL Bilthoven The Netherlands
| | - Leo A. van der Pol
- Inst. for Translational Vaccinology (Intravacc, process development); P.O. Box 450, 3720 AL Bilthoven The Netherlands
| | - Wilfried A. M. Bakker
- Inst. for Translational Vaccinology (Intravacc, process development); P.O. Box 450, 3720 AL Bilthoven The Netherlands
| |
Collapse
|
16
|
Pupo E, Hamstra HJ, Meiring H, van der Ley P. Lipopolysaccharide engineering in Neisseria meningitidis: structural analysis of different pentaacyl lipid A mutants and comparison of their modified agonist properties. J Biol Chem 2014; 289:8668-80. [PMID: 24492609 PMCID: PMC3961689 DOI: 10.1074/jbc.m114.554345] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Indexed: 12/20/2022] Open
Abstract
Engineering the lipopolysaccharide (LPS) biosynthetic pathway offers the potential to obtain modified derivatives with optimized adjuvant properties. Neisseria meningitidis strain H44/76 was modified by expression of the pagL gene encoding lipid A 3-O-deacylase from Bordetella bronchiseptica and by inactivation of the lgtB gene encoding the terminal oligosaccharide galactosyltransferase. Mass spectrometry analysis of purified mutant LPS was used for detailed compositional analysis of all present molecular species. This determined that the modified LPS was mainly pentaacylated, demonstrating high efficiency of conversion from the hexaacyl to the 3-O-deacylated form by heterologous lipid A 3-O-deacylase (PagL) expression. MS analyses also provided evidence for expression of only one major oligosaccharide glycoform, which lacked the terminal galactose residue as expected from inactivation of the lgtB gene. The immunomodulatory properties of PagL-deacylated LPS were compared with another pentaacyl form obtained from an lpxL1(-) mutant, which lacks the 2' secondary acyl chain. Although both LPS mutants displayed impaired capacity to induce production of the pro-inflammatory cytokine IL-6 in the monocytic cell line Mono Mac 6, induction of the Toll-interleukin-1 receptor domain-containing adaptor-inducing interferon-β-dependent chemokine interferon-γ-induced protein 10 was largely retained only for the lgtB(-)/pagL(+) mutant. Removal of remaining hexaacyl species exclusively present in lgtB(-)/pagL(+) LPS demonstrated that these minor species potentiate but do not determine the activity of this LPS. These results are the first to indicate a qualitatively different response of human innate cells to pentaacyl lpxL1(-) and pagL(+) LPS and show the importance of detailed structure-function analysis when working with modified lipid A structures. The pagL(+) LPS has significant potential as immune modulator in humans.
Collapse
Affiliation(s)
- Elder Pupo
- From the Institute for Translational Vaccinology and
| | - Hendrik-Jan Hamstra
- the National Institute for Public Health and the Environment, 3721 MA Bilthoven, The Netherlands
| | - Hugo Meiring
- From the Institute for Translational Vaccinology and
| | | |
Collapse
|
17
|
Anderson AS, Jansen KU, Eiden J. New frontiers in meningococcal vaccines. Expert Rev Vaccines 2014; 10:617-34. [DOI: 10.1586/erv.11.50] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
18
|
van de Waterbeemd B, Zomer G, Kaaijk P, Ruiterkamp N, Wijffels RH, van den Dobbelsteen GPJM, van der Pol LA. Improved production process for native outer membrane vesicle vaccine against Neisseria meningitidis. PLoS One 2013; 8:e65157. [PMID: 23741478 PMCID: PMC3669287 DOI: 10.1371/journal.pone.0065157] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2013] [Accepted: 04/23/2013] [Indexed: 11/18/2022] Open
Abstract
An improved detergent-free process has been developed to produce vaccine based on native outer membrane vesicles (NOMV) against Neisseria meningitidis serogroup B. Performance was evaluated with the NonaMen vaccine concept, which provides broad coverage based on nine distinct PorA antigens. Scalable aseptic equipment was implemented, replacing undesirable steps like ultracentrifugation, inactivation with phenol, and the use of preservatives. The resulting process is more consistent and gives a higher yield than published reference processes, enabling NOMV production at commercial scale. Product quality met preliminary specifications for 9 consecutive batches, and an ongoing study confirmed real-time stability up to 12 months after production. As the NOMV had low endotoxic activity and induced high bactericidal titres in mice, they are expected to be safe and effective in humans. The production process is not limited to NonaMen and may be applicable for other N. meningitidis serogroups and other gram-negative pathogens. The current results therefore facilitate the late-stage development and clinical evaluation of NOMV vaccines.
Collapse
Affiliation(s)
- Bas van de Waterbeemd
- National Institute for Public Health and the Environment (RIVM), Vaccinology, Bilthoven, The Netherlands.
| | | | | | | | | | | | | |
Collapse
|
19
|
van de Waterbeemd B, Mommen GPM, Pennings JLA, Eppink MH, Wijffels RH, van der Pol LA, de Jong APJM. Quantitative Proteomics Reveals Distinct Differences in the Protein Content of Outer Membrane Vesicle Vaccines. J Proteome Res 2013; 12:1898-908. [DOI: 10.1021/pr301208g] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Geert P. M. Mommen
- Institute for Translational Vaccinology (Intravacc), Bilthoven, The Netherlands
- Utrecht Institute for Pharmaceutical Sciences and Bijvoet Center for Biomolecular Research, The Netherlands
- Netherlands Proteomics Centre, The Netherlands
| | - Jeroen L. A. Pennings
- National Institute for Public
Health and the Environment, Centre for Health Protection Research, Bilthoven, The Netherlands
| | | | | | - Leo A. van der Pol
- Institute for Translational Vaccinology (Intravacc), Bilthoven, The Netherlands
| | - Ad P. J. M. de Jong
- Institute for Translational Vaccinology (Intravacc), Bilthoven, The Netherlands
| |
Collapse
|
20
|
van de Waterbeemd B, Zomer G, van den Ijssel J, van Keulen L, Eppink MH, van der Ley P, van der Pol LA. Cysteine depletion causes oxidative stress and triggers outer membrane vesicle release by Neisseria meningitidis; implications for vaccine development. PLoS One 2013; 8:e54314. [PMID: 23372704 PMCID: PMC3553081 DOI: 10.1371/journal.pone.0054314] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2012] [Accepted: 12/11/2012] [Indexed: 12/13/2022] Open
Abstract
Outer membrane vesicles (OMV) contain immunogenic proteins and contribute to in vivo survival and virulence of bacterial pathogens. The first OMV vaccines successfully stopped Neisseria meningitidis serogroup B outbreaks but required detergent-extraction for endotoxin removal. Current vaccines use attenuated endotoxin, to preserve immunological properties and allow a detergent-free process. The preferred process is based on spontaneously released OMV (sOMV), which are most similar to in vivo vesicles and easier to purify. The release mechanism however is poorly understood resulting in low yield. This study with N. meningitidis demonstrates that an external stimulus, cysteine depletion, can trigger growth arrest and sOMV release in sufficient quantities for vaccine production (±1500 human doses per liter cultivation). Transcriptome analysis suggests that cysteine depletion impairs iron-sulfur protein assembly and causes oxidative stress. Involvement of oxidative stress is confirmed by showing that addition of reactive oxygen species during cysteine-rich growth also triggers vesiculation. The sOMV in this study are similar to vesicles from natural infection, therefore cysteine-dependent vesiculation is likely to be relevant for the in vivo pathogenesis of N. meningitidis.
Collapse
Affiliation(s)
- Bas van de Waterbeemd
- Vaccinology, National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands.
| | | | | | | | | | | | | |
Collapse
|
21
|
Outer membrane vesicles (OMV) production of Neisseria meningitidis serogroup B in batch process. Vaccine 2012; 30:6064-9. [DOI: 10.1016/j.vaccine.2012.07.052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2012] [Revised: 07/15/2012] [Accepted: 07/22/2012] [Indexed: 11/22/2022]
|
22
|
van de Waterbeemd B, Streefland M, van Keulen L, van den IJssel J, de Haan A, Eppink MH, van der Pol LA. Identification and optimization of critical process parameters for the production of NOMV vaccine against Neisseria meningitidis. Vaccine 2012; 30:3683-90. [DOI: 10.1016/j.vaccine.2012.03.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2012] [Revised: 03/07/2012] [Accepted: 03/12/2012] [Indexed: 11/16/2022]
|
23
|
van de Waterbeemd B, Streefland M, van der Ley P, Zomer B, van Dijken H, Martens D, Wijffels R, van der Pol L. Improved OMV vaccine against Neisseria meningitidis using genetically engineered strains and a detergent-free purification process. Vaccine 2010; 28:4810-6. [DOI: 10.1016/j.vaccine.2010.04.082] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2010] [Revised: 04/26/2010] [Accepted: 04/27/2010] [Indexed: 11/25/2022]
|
24
|
Oberhardt MA, Palsson BØ, Papin JA. Applications of genome-scale metabolic reconstructions. Mol Syst Biol 2009; 5:320. [PMID: 19888215 PMCID: PMC2795471 DOI: 10.1038/msb.2009.77] [Citation(s) in RCA: 577] [Impact Index Per Article: 38.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2009] [Accepted: 09/22/2009] [Indexed: 12/12/2022] Open
Abstract
The availability and utility of genome-scale metabolic reconstructions have exploded since the first genome-scale reconstruction was published a decade ago. Reconstructions have now been built for a wide variety of organisms, and have been used toward five major ends: (1) contextualization of high-throughput data, (2) guidance of metabolic engineering, (3) directing hypothesis-driven discovery, (4) interrogation of multi-species relationships, and (5) network property discovery. In this review, we examine the many uses and future directions of genome-scale metabolic reconstructions, and we highlight trends and opportunities in the field that will make the greatest impact on many fields of biology.
Collapse
Affiliation(s)
- Matthew A Oberhardt
- Department of Biomedical Engineering, University of Virginia, Health System, Charlottesville, VA, USA
| | | | | |
Collapse
|
25
|
Baart GJE, Langenhof M, van de Waterbeemd B, Hamstra HJ, Zomer B, van der Pol LA, Beuvery EC, Tramper J, Martens DE. Expression of phosphofructokinase in Neisseria meningitidis. MICROBIOLOGY-SGM 2009; 156:530-542. [PMID: 19797358 DOI: 10.1099/mic.0.031641-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Neisseria meningitidis serogroup B is a pathogen that can infect diverse sites within the human host. According to the N. meningitidis genomic information and experimental observations, glucose can be completely catabolized through the Entner-Doudoroff pathway and the pentose phosphate pathway. The Embden-Meyerhof-Parnas pathway is not functional, because the gene for phosphofructokinase (PFK) is not present. The phylogenetic distribution of PFK indicates that in most obligate aerobic organisms, PFK is lacking. We conclude that this is because of the limited contribution of PFK to the energy supply in aerobically grown organisms in comparison with the energy generated through oxidative phosphorylation. Under anaerobic or microaerobic conditions, the available energy is limiting, and PFK provides an advantage, which explains the presence of PFK in many (facultatively) anaerobic organisms. In accordance with this, in silico flux balance analysis predicted an increase of biomass yield as a result of PFK expression. However, analysis of a genetically engineered N. meningitidis strain that expressed a heterologous PFK showed that the yield of biomass on substrate decreased in comparison with a pfkA-deficient control strain, which was associated mainly with an increase in CO(2) production, whereas production of by-products was similar in the two strains. This might explain why the pfkA gene has not been obtained by horizontal gene transfer, since it is initially unfavourable for biomass yield. No large effects related to heterologous expression of pfkA were observed in the transcriptome. Although our results suggest that introduction of PFK does not contribute to a more efficient strain in terms of biomass yield, achievement of a robust, optimal metabolic network that enables a higher growth rate or a higher biomass yield might be possible after adaptive evolution of the strain, which remains to be investigated.
Collapse
Affiliation(s)
- Gino J E Baart
- Wageningen University, Food and Bioprocess Engineering Group, PO Box 8129, 6700 EV Wageningen, The Netherlands.,Netherlands Vaccine Institute (NVI), Unit Research and Development, PO Box 457, 3720 AL Bilthoven, The Netherlands
| | - Marc Langenhof
- Wageningen University, Food and Bioprocess Engineering Group, PO Box 8129, 6700 EV Wageningen, The Netherlands.,Netherlands Vaccine Institute (NVI), Unit Research and Development, PO Box 457, 3720 AL Bilthoven, The Netherlands
| | - Bas van de Waterbeemd
- Netherlands Vaccine Institute (NVI), Unit Research and Development, PO Box 457, 3720 AL Bilthoven, The Netherlands
| | - Hendrik-Jan Hamstra
- Netherlands Vaccine Institute (NVI), Unit Research and Development, PO Box 457, 3720 AL Bilthoven, The Netherlands
| | - Bert Zomer
- Netherlands Vaccine Institute (NVI), Unit Research and Development, PO Box 457, 3720 AL Bilthoven, The Netherlands
| | - Leo A van der Pol
- Netherlands Vaccine Institute (NVI), Unit Research and Development, PO Box 457, 3720 AL Bilthoven, The Netherlands
| | - E C Beuvery
- PAT consultancy, Kerkstraat 66, 4132 BG Vianen, The Netherlands
| | - Johannes Tramper
- Wageningen University, Food and Bioprocess Engineering Group, PO Box 8129, 6700 EV Wageningen, The Netherlands
| | - Dirk E Martens
- Wageningen University, Food and Bioprocess Engineering Group, PO Box 8129, 6700 EV Wageningen, The Netherlands
| |
Collapse
|
26
|
Baart GJE, Willemsen M, Khatami E, de Haan A, Zomer B, Beuvery EC, Tramper J, Martens DE. Modeling Neisseria meningitidis B metabolism at different specific growth rates. Biotechnol Bioeng 2008; 101:1022-35. [PMID: 18942773 DOI: 10.1002/bit.22016] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Neisseria meningitidis is a human pathogen that can infect diverse sites within the human host. The major diseases caused by N. meningitidis are responsible for death and disability, especially in young infants. At the Netherlands Vaccine Institute (NVI) a vaccine against serogroup B organisms is currently being developed. This study describes the influence of the growth rate of N. meningitidis on its macro-molecular composition and its metabolic activity and was determined in chemostat cultures. In the applied range of growth rates, no significant changes in RNA content and protein content with growth rate were observed in N. meningitidis. The DNA content in N. meningitidis was somewhat higher at the highest applied growth rate. The phospholipid and lipopolysaccharide content in N. meningitidis changed with growth rate but no specific trends were observed. The cellular fatty acid composition and the amino acid composition did not change significantly with growth rate. Additionally, it was found that the PorA content in outer membrane vesicles was significantly lower at the highest growth rate. The metabolic fluxes at various growth rates were calculated using flux balance analysis. Errors in fluxes were calculated using Monte Carlo Simulation and the reliability of the calculated flux distribution could be indicated, which has not been reported for this type of analysis. The yield of biomass on substrate (Y(x/s)) and the maintenance coefficient (m(s)) were determined as 0.44 (+/-0.04) g g(-1) and 0.04 (+/-0.02) g g(-1) h(-1), respectively. The growth associated energy requirement (Y(x/ATP)) and the non-growth associated ATP requirement for maintenance (m(ATP)) were estimated as 0.13 (+/-0.04) mol mol(-1) and 0.43 (+/-0.14) mol mol(-1) h(-1), respectively. It was found that the split ratio between the Entner-Doudoroff and the pentose phosphate pathway, the sole glucose utilizing pathways in N. meningitidis, had a minor effect on ATP formation rate but a major effect on the fluxes going through for instance the citric-acid cycle. For this reason, we presented flux ranges for underdetermined parts of metabolic network rather than presenting single flux values, which is more commonly done in literature.
Collapse
Affiliation(s)
- Gino J E Baart
- Netherlands Vaccine Institute (NVI), Unit Research & Development, PO Box 457, 3720AL Bilthoven, The Netherlands.
| | | | | | | | | | | | | | | |
Collapse
|
27
|
Vaccine against infectious bovine keratoconjunctivitis: A new approach to optimize the production of highly piliated Moraxella bovis cells. Vaccine 2008; 26:6542-9. [DOI: 10.1016/j.vaccine.2008.09.059] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2008] [Accepted: 09/17/2008] [Indexed: 11/23/2022]
|
28
|
Roberts R, Moreno G, Bottero D, Gaillard ME, Fingermann M, Graieb A, Rumbo M, Hozbor D. Outer membrane vesicles as acellular vaccine against pertussis. Vaccine 2008; 26:4639-46. [DOI: 10.1016/j.vaccine.2008.07.004] [Citation(s) in RCA: 97] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2008] [Revised: 06/27/2008] [Accepted: 07/01/2008] [Indexed: 10/21/2022]
|
29
|
Soons ZITA, van den IJssel J, van der Pol LA, van Straten G, van Boxtel AJB. Scaling-up vaccine production: implementation aspects of a biomass growth observer and controller. Bioprocess Biosyst Eng 2008; 32:289-99. [DOI: 10.1007/s00449-008-0248-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2008] [Accepted: 07/12/2008] [Indexed: 10/21/2022]
|