1
|
Liu S, Li J, Cheng Q, Duan K, Wang Z, Yan S, Tian S, Wang H, Wu S, Lei X, Yang Y, Ma N. A Single-Step Method for Harvesting Influenza Viral Particles from MDCK Cell Culture Supernatant with High Yield and Effective Impurity Removal. Viruses 2024; 16:768. [PMID: 38793649 PMCID: PMC11125750 DOI: 10.3390/v16050768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/08/2024] [Accepted: 05/11/2024] [Indexed: 05/26/2024] Open
Abstract
Influenza vaccines, which are recommended by the World Health Organization (WHO), are the most effective preventive measure against influenza virus infection. Madin-Darby canine kidney (MDCK) cell culture is an emerging technology used to produce influenza vaccines. One challenge when purifying influenza vaccines using this cell culture system is to efficiently remove impurities, especially host cell double-stranded DNA (dsDNA) and host cell proteins (HCPs), for safety assurance. In this study, we optimized ion-exchange chromatography methods to harvest influenza viruses from an MDCK cell culture broth, the first step in influenza vaccine purification. Bind/elute was chosen as the mode of operation for simplicity. The anion-exchange Q chromatography method was able to efficiently remove dsDNA and HCPs, but the recovery rate for influenza viruses was low. However, the cation-exchange SP process was able to simultaneously achieve high dsDNA and HCP removal and high influenza virus recovery. For the SP process to work, the clarified cell culture broth needed to be diluted to reduce its ionic strength, and the optimal dilution rate was determined to be 1:2 with purified water. The SP process yielded a virus recovery rate exceeding 90%, as measured using a hemagglutination units (HAUs) assay, with removal efficiencies over 97% for HCPs and over 99% for dsDNA. Furthermore, the general applicability of the SP chromatography method was demonstrated with seven strains of influenza viruses recommended for seasonal influenza vaccine production, including H1N1, H3N2, B (Victoria), and B (Yamagata) strains, indicating that the SP process could be utilized as a platform process. The SP process developed in this study showed four advantages: (1) simple operation, (2) a high recovery rate for influenza viruses, (3) a high removal rate for major impurities, and (4) general applicability.
Collapse
Affiliation(s)
- Sixu Liu
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China; (S.L.); (J.L.); (Q.C.); (K.D.); (S.Y.); (S.T.); (H.W.); (S.W.); (X.L.)
| | - Jingqi Li
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China; (S.L.); (J.L.); (Q.C.); (K.D.); (S.Y.); (S.T.); (H.W.); (S.W.); (X.L.)
- GenScript (Shanghai) Biotech Co., Ltd., Shanghai 200131, China
| | - Qingtian Cheng
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China; (S.L.); (J.L.); (Q.C.); (K.D.); (S.Y.); (S.T.); (H.W.); (S.W.); (X.L.)
| | - Kangyi Duan
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China; (S.L.); (J.L.); (Q.C.); (K.D.); (S.Y.); (S.T.); (H.W.); (S.W.); (X.L.)
| | - Zhan Wang
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang 110016, China;
| | - Shuang Yan
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China; (S.L.); (J.L.); (Q.C.); (K.D.); (S.Y.); (S.T.); (H.W.); (S.W.); (X.L.)
| | - Shuaishuai Tian
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China; (S.L.); (J.L.); (Q.C.); (K.D.); (S.Y.); (S.T.); (H.W.); (S.W.); (X.L.)
| | - Hairui Wang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China; (S.L.); (J.L.); (Q.C.); (K.D.); (S.Y.); (S.T.); (H.W.); (S.W.); (X.L.)
- Qilu Pharmaceutical Co., Ltd., Jinan 250104, China
| | - Shaobin Wu
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China; (S.L.); (J.L.); (Q.C.); (K.D.); (S.Y.); (S.T.); (H.W.); (S.W.); (X.L.)
- Beijing Zhifei Lvzhu Biopharmaceutical Co., Ltd., Beijing 100176, China
| | - Xinkui Lei
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China; (S.L.); (J.L.); (Q.C.); (K.D.); (S.Y.); (S.T.); (H.W.); (S.W.); (X.L.)
- Beijing Zhifei Lvzhu Biopharmaceutical Co., Ltd., Beijing 100176, China
| | - Yu Yang
- School of Life Science and Biopharmaceutics, Shenyang Pharmaceutical University, Shenyang 110016, China;
| | - Ningning Ma
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang 110016, China; (S.L.); (J.L.); (Q.C.); (K.D.); (S.Y.); (S.T.); (H.W.); (S.W.); (X.L.)
| |
Collapse
|
2
|
Qin T, Chen Y, Huangfu D, Yin Y, Miao X, Yin Y, Chen S, Peng D, Liu X. PA-X Protein of H1N1 Subtype Influenza Virus Disables the Nasal Mucosal Dendritic Cells for Strengthening Virulence. Virulence 2022; 13:1928-1942. [PMID: 36271710 DOI: 10.1080/21505594.2022.2139474] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
PA-X protein arises from a ribosomal frameshift in the PA of influenza A virus (IAV). However, the immune regulatory effect of the PA-X protein of H1N1 viruses on the nasal mucosal system remains unclear. Here, a PA-X deficient H1N1 rPR8 viral strain (rPR8-△PAX) was generated and its pathogenicity was determined. The results showed that PA-X was a pro-virulence factor in mice. Furthermore, it reduced the ability of H1N1 viruses to infect dendritic cells (DCs), the regulator of the mucosal immune system, but not non-immune cells (DF-1 and Calu-3). Following intranasal infection of mice, CCL20, a chemokine that monitors the recruitment of submucosal DCs, was downregulated by PA-X, resulting in an inhibition of the recruitment of CD11b+ DCs to submucosa. It also attenuated the migration of CCR7+ DCs to cervical lymph nodes and inhibited DC maturation with low MHC II and CD40 expression. Moreover, PA-X suppressed the maturation of phenotypic markers (CD80, CD86, CD40, and MHC II) and the levels of secreted pro-inflammatory cytokines (IL-1β, IL-6, and TNF-α) while enhancing endocytosis and levels of anti-inflammatory IL-10 in vitro, suggesting an impaired maturation of DCs that the key step for the activation of downstream immune responses. These findings suggested the PA-X protein played a critical role in escaping the immune response of nasal mucosal DCs for increasing the virulence of H1N1 viruses.
Collapse
Affiliation(s)
- Tao Qin
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu 225009, P.R. China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China.,Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, Jiangsu 225009, P.R. China
| | - Yulian Chen
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China
| | - Dandan Huangfu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China
| | - Yinyan Yin
- School of Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China
| | - Xinyu Miao
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China
| | - Yuncong Yin
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu 225009, P.R. China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China.,Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, Jiangsu 225009, P.R. China
| | - Sujuan Chen
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu 225009, P.R. China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China.,Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, Jiangsu 225009, P.R. China
| | - Daxin Peng
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu 225009, P.R. China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China.,Jiangsu Research Centre of Engineering and Technology for Prevention and Control of Poultry Disease, Yangzhou, Jiangsu 225009, P.R. China
| | - Xiufan Liu
- College of Veterinary Medicine, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China.,Jiangsu Co-Innovation Center for the Prevention and Control of Important Animal Infectious Disease and Zoonoses, Yangzhou, Jiangsu 225009, P.R. China.,Joint International Research Laboratory of Agriculture and Agri-Product Safety, the Ministry of Education of China, Yangzhou University, Yangzhou, Jiangsu 225009, P.R. China
| |
Collapse
|
3
|
Fossouo VN, Mouiche MMM, Labat A, Wango RK, Tiwoda C, Tonga C, Ndongo CB, Kameni JMF, Nguefack-Tsague G, Djeunga HCN, Gnigninanjouena O, Njajou OT. Health Security Planning: Developing the Cameroon National Action Plan for Health Security. Health Secur 2022; 20:424-434. [DOI: 10.1089/hs.2022.0032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- Viviane Ndoungué Fossouo
- Viviane Ndoungué Fossouo, MPH, is an Epidemiologist and Head of Section, IHR Implementation Program, National Public Health Observatory, Ministry of Public Health, Yaoundé, Cameroon
| | - Mohamed Moctar Mouliom Mouiche
- Mohamed Moctar Mouliom Mouiche, DVM, PhD, is Country Team Lead, USAID Infectious Disease Detection and Surveillance Project, ICF Cameroon, Yaoundé, Cameroon
- Mohamed Moctar Mouliom Mouiche is also an Associate Professor, School of Veterinary Medicine and Sciences, University of Ngaoundéré, Ngaoundéré, Cameroon
| | - Aline Labat
- Aline Labat, MPH, is a Researcher and Lecturer, School of Public Health, Université Libre de Bruxelles, Brussels, Belgium
| | - Roland Kimbi Wango
- Roland Kimbi Wango, MA, MPH, is a Technical Officer, Emergency Preparedness and Response Programme, World Health Organization Regional Office for Africa, Dakar Hub, Senegal
| | - Christie Tiwoda
- Christie Tiwoda is an Assistant Program Officer, Regulatory Unit, Legal Affairs and Litigation Division, Ministry of Public Health, Yaoundé, Cameroon
| | - Calvin Tonga
- Calvin Tonga, PhD, MSc, MPH, is Head of Planning, Monitoring and Evaluation Unit, Expanded Programme on Immunization, Ministry of Public Health, Yaoundé, Cameroon
| | - Chancelline Bilounga Ndongo
- Chancelline Bilounga Ndongo, MD, MPH, is Head, Epidemiological Surveillance Service, Department of Disease Control, Epidemic, and Pandemics, Ministry of Public Health, Yaoundé, Cameroon
- Chancelline Bilounga Ndongo is also a Lecturer, Faculty of Medicine and Pharmaceutical Sciences, University of Douala, Douala, Cameroon
| | - Jean Marc Feussom Kameni
- Jean Marc Feussom Kameni, DVM, CES, MSc, is a Veterinary Epidemiologist, Animal Disease Epidemiology Surveillance Network (RESCAM), Ministry of Livestock, Fisheries, and Animal Industries, Yaoundé, Cameroon
| | - Georges Nguefack-Tsague
- Georges Nguefack-Tsague, PhD, is an Associate Professor of Biostatistics, Department of Public Health, Faculty of Medicine and Biomedical Sciences, University of Yaoundé I, Yaoundé, Cameroon
| | - Hugues C. Nana Djeunga
- Hugues C. Nana Djeunga, PhD, is a Research Scientist, Molecular Parasitology and Genetic Epidemiology Department, Centre for Research on Filariasis and Other Tropical Diseases, Yaoundé, Cameroon
| | - Oumarou Gnigninanjouena
- Oumarou Gnigninanjouena, MD, MPH, is Coordinator, National Public Health Observatory, Ministry of Public Health, Yaoundé, Cameroon
| | - Omer T. Njajou
- Omer T. Njajou, DSc, PhD, is an Epidemiologist, Tackling Deadly Diseases in Africa Program, DAI Global Health, London, UK
| |
Collapse
|
4
|
Khatami M. Deceptology in cancer and vaccine sciences: Seeds of immune destruction-mini electric shocks in mitochondria: Neuroplasticity-electrobiology of response profiles and increased induced diseases in four generations - A hypothesis. Clin Transl Med 2020; 10:e215. [PMID: 33377661 PMCID: PMC7749544 DOI: 10.1002/ctm2.215] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2020] [Revised: 10/08/2020] [Accepted: 10/13/2020] [Indexed: 12/16/2022] Open
Abstract
From Rockefeller's support of patent medicine to Gates' patent vaccines, medical establishment invested a great deal in intellectual ignorance. Through the control over medical education and research it has created a public illusion to prop up corporate profit and encouraged the lust for money and power. An overview of data on cancer and vaccine sciences, the status of Americans' health, a survey of repeated failed projects, economic toxicity, and heavy drug consumption or addiction among young and old provide compelling evidence that in the twentieth century nearly all classic disease categories (congenital, inheritance, neonatal, or induced) shifted to increase induced diseases. Examples of this deceptology in ignoring or minimizing, and mocking fundamental discoveries and theories in cancer and vaccine sciences are attacks on research showing that (a), effective immunity is responsible for defending and killing pathogens and defective cancerous cells, correcting and repairing genetic mutations; (b) viruses cause cancer; and (c), abnormal gene mutations are often the consequences of (and secondary to) disturbances in effective immunity. The outcomes of cancer reductionist approaches to therapies reveal failure rates of 90% (+/-5) for solid tumors; loss of over 50 million lives and waste of $30-50 trillions on too many worthless, out-of-focus, and irresponsible projects. Current emphasis on vaccination of public with pathogen-specific vaccines and ingredients seems new terms for drugging young and old. Cumulative exposures to low level carcinogens and environmental hazards or high energy electronic devices (EMF; 5G) are additional triggers to vaccine toxicities (antigen-mitochondrial overload) or "seeds of immune destruction" that create mini electrical shocks (molecular sinks holes) in highly synchronized and regulated immune network that retard time-energy-dependent biorhythms in organs resulting in causes, exacerbations or consequences of mild, moderate or severe immune disorders. Four generations of drug-dependent Americans strongly suggest that medical establishment has practiced decades of intellectual deception through its claims on "war on cancer"; that cancer is 100, 200, or 1000 diseases; identification of "individual" genetic mutations to cure diseases; "vaccines are safe". Such immoral and unethical practices, along with intellectual harassment and bullying, censoring or silencing of independent and competent professionals ("Intellectual Me Too") present grave concerns, far greater compared with the sexual harassment of 'Me Too' movement that was recently spearheaded by NIH. The principal driving forces behind conducting deceptive and illogical medical/cancer and vaccine projects seem to be; (a) huge return of investment and corporate profit for selling drugs and vaccines; (b) maintenance of abusive power over public health; (c) global control of population growth via increased induction of diseases, infertility, decline in life-span, and death. An overview of accidental discoveries that we established and extended since 1980s, on models of acute and chronic ocular inflammatory diseases, provides series of the first evidence for a direct link between inflammation and multistep immune dysfunction in tumorigenesis and angiogenesis. Results are relevant to demonstrate that current emphasis on vaccinating the unborn, newborn, or infant would induce immediate or long-term immune disorders (eg, low birth weight, preterm birth, fatigue, autism, epilepsy/seizures, BBB leakage, autoimmune, neurodegenerative or digestive diseases, obesity, diabetes, cardiovascular problems, or cancers). Vaccination of the unborn is likely to disturb trophoblast-embryo-fetus-placenta biology and orderly growth of embryo-fetus, alter epithelial-mesenchymal transition or constituent-inducible receptors, damage mitochondria, and diverse function of histamine-histidine pathways. Significant increased in childhood illnesses are likely due to toxicities of vaccine and incipient (eg, metals [Al, Hg], detergents, fetal tissue, DNA/RNA) that retard bioenergetics of mitochondria, alter polarization-depolarization balance of tumoricidal (Yin) and tumorigenic (Yang) properties of immunity. Captivated by complex electobiology of immunity, this multidisciplinary perspective is an attempt to initiate identifying bases for increased induction of immune disorders in three to four generations in America. We hypothesize that (a) gene-environment-immune biorhythms parallel neuronal function (brain neuroplasticity) with super-packages of inducible (adaptive or horizontal) electronic signals and (b) autonomic sympathetic and parasympathetic circuitry that shape immunity (Yin-Yang) cannot be explained by limited genomics (innate, perpendicular) that conventionally explain certain inherited diseases (eg, sickle cell anemia, progeria). Future studies should focus on deep learning of complex electrobiology of immunity that requires differential bioenergetics from mitochondria and cytoplasm. Approaches to limit or control excessive activation of gene-environment-immunity are keys to assess accurate disease risk formulations, prevent inducible diseases, and develop universal safe vaccines that promote health, the most basic human right.
Collapse
Affiliation(s)
- Mahin Khatami
- Inflammation, Aging and Cancer, National Cancer Institute (NCI)the National Institutes of Health (NIH) (Retired)BethesdaMarylandUSA
| |
Collapse
|
5
|
Li S, Qiao Y, Xu Y, Li P, Nie J, Zhao Q, Chai W, Shi Y, Kong W, Shan Y. Identification of Linear Peptide Immunogens with Verified Broad-spectrum Immunogenicity from the Conserved Regions within the Hemagglutinin Stem Domain of H1N1 Influenza Virus. Immunol Invest 2020; 51:411-424. [PMID: 33078652 DOI: 10.1080/08820139.2020.1834579] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Background: Influenza A viruses (IAVs) induce acute respiratory disease and cause severe epidemics and pandemics. Since IAVs exhibit antigenic variation and genome reassortment, the development of broad-spectrum influenza vaccines is crucial. The stem of the hemagglutinin (HA) is highly conserved across IAV strains and thus has been explored in broad-spectrum influenza vaccine studies. The present study aimed to identify viral epitopes capable of eliciting effective host immune responses, which can be explored for the development of broad-spectrum non-strain specific prophylactic options against IAV.Methods: In this study, a series of conserved linear sequences from the HA stem of IAV (H1N1) was recognized by sequence alignment and B/T-cell epitope prediction after being chemically coupled to the Keyhole Limpet Hemocyanin (KLH) protein. The predicted linear epitopes were identified by enzyme-linked immunosorbent assay (ELISA) after animal immunization and then fused with ferritin carriers.Results: Three predicted linear epitopes with relatively strong immunogenicity, P3, P6 and P8 were fused with ferritin carriers P3F, P6F and P8F, respectively to further improve their immunogenicity. Antibody titre of the sera of mice immunized with the recombinant immunogens revealed the elicitation of specific antibody-binding activities by the identified sequences. While hemagglutinin-inhibition activities were not detected in the antisera, neutralizing antibodies against the H1 and H3 virus subtypes were detected by the microneutralization assay.Conclusion: The linear epitopes fused with ferritin identified in this study can lay the foundation for future advancements in development of broad-spectrum subunit vaccine against IAV (H1N1), and give rise to the potential future applicability of ferritin-based antigen delivery nanoplatforms.
Collapse
Affiliation(s)
- Shuang Li
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Yongbo Qiao
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Yan Xu
- Laboratory of Molecular Immunology, State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai, China
| | - Pengju Li
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Jiaojiao Nie
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Qi Zhao
- Cancer Centre, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Taipa, China
| | - Wen Chai
- Changchun Institute of Biological Products Co., Ltd, Changchun, Jilin, China
| | - Yuhua Shi
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Wei Kong
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China.,Key Laboratory for Molecular Enzymology and Engineering, the Ministry of Education, School of Life Sciences, Jilin University, Changchun, Jilin, China
| | - Yaming Shan
- National Engineering Laboratory for AIDS Vaccine, School of Life Sciences, Jilin University, Changchun, Jilin, China.,Cancer Centre, Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Taipa, China.,Key Laboratory for Molecular Enzymology and Engineering, the Ministry of Education, School of Life Sciences, Jilin University, Changchun, Jilin, China
| |
Collapse
|
6
|
Fernandez-Montero JV, Soriano V, Barreiro P, de Mendoza C, Artacho MÁ. Coronavirus and other airborne agents with pandemic potential. CURRENT OPINION IN ENVIRONMENTAL SCIENCE & HEALTH 2020; 17:41-48. [PMID: 32995685 PMCID: PMC7513873 DOI: 10.1016/j.coesh.2020.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The recent emergence of a novel coronavirus (severe acute respiratory syndrome coronavirus 2) has caused a pandemic, which is the most severe infectious disease outbreak in many decades. Other infective agents such as influenza as well as other neglected viruses such as Lassa virus, Nipah virus or poxviruses are also a cause for concern owing to their attack rate and potential for global spread. Drug-resistant bacteria, such as Mycobacterium tuberculosis, are already a significant public health issue in many countries, and it is expected that they will be expanding in the near future. Finally, airborne bioterrorism agents have high morbidity and mortality rates and should be looked with concern in the current international unrest.
Collapse
Affiliation(s)
- Jose Vicente Fernandez-Montero
- Department of Infectious Diseases, University Hospital Crosshouse, Kilmarnock, Scotland, United Kingdom
- University of Glasgow School of Medicine, Glasgow, Scotland, United Kingdom
| | - Vicente Soriano
- UNIR Health Sciences School and Medical Centre, Madrid, Spain
| | - Pablo Barreiro
- Internal Medicine Laboratory Puerta de Hierro Research Institute, University Hospital Majadahonda, Madrid, Spain
| | | | | |
Collapse
|
7
|
Pérez-Rubio A, Ancochea J, Eiros Bouza JM. Quadrivalent cell culture influenza virus vaccine. Comparison to egg-derived vaccine. Hum Vaccin Immunother 2020; 16:1746-1752. [PMID: 32255723 DOI: 10.1080/21645515.2019.1701912] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Influenza virus infections pose a serious public health problem and vaccination is the most effective public health intervention against them. The current manufacture of influenza vaccines in embryonated chicken eggs entails significant limitations. These limitations have been overcome by producing vaccines in cell culture, which allow a faster and more flexible response to potential pandemic threats. Given the impact of influenza B virus on disease burden, the availability of quadrivalent vaccines is useful for increasing the rate of protection from disease. This paper analyzes the limitations of the current production of influenza vaccine in eggs and the advantages of vaccines developed in cell culture, as well as their safety, tolerability, efficacy and effectiveness. Additionally, we reflect on the contribution of new quadrivalent vaccines from cell culture as an alternative in seasonal vaccination campaigns against influenza.
Collapse
Affiliation(s)
- Alberto Pérez-Rubio
- Dirección Médica, Hospital Clínico Universitario de Valladolid , Valladolid, Castilla y León, Spain
| | - Julio Ancochea
- Neumology, Hospital Universitario de la Princesa , Madrid, Spain
| | | |
Collapse
|
8
|
Sedova ES, Verkhovskaya LV, Artemova EA, Shcherbinin DN, Lysenko AA, Rudneva IA, Lyashko AV, Alekseeva SA, Esmagambetov IB, Timofeeva TA, Shmarov MM. Protecting Mice from H7 Avian Influenza Virus by Immunisation with a Recombinant Adenovirus Encoding Influenza A Virus Conserved Antigens. ACTA ACUST UNITED AC 2020. [DOI: 10.30895/2221-996x-2020-20-1-60-67] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Influenza is a highly contagious disease that causes annual epidemics and occasional pandemics. Birds are believed to be the source of newly emerging pandemic strains, including highly pathogenic avian influenza viruses of the subtype H7. The aim of the study: to evaluate the ability of the recombinant human adenovirus, serotype 5, which expresses genes of influenza A highly conserved antigens (ion channel M2 and nucleoprotein NP), to provide protection to laboratory mice against infection with a lethal dose of avian influenza virus, subtype H7. To achieve this goal, it was necessary to adapt influenza A virus, subtype H7 for reproduction in the lungs of mice, to characterise it, and to use it for evaluation of the protective properties of the recombinant adenovirus. Materials and methods: avian influenza virus A/Chicken/NJ/294508-12/2004 (H7N2) was adapted for reproduction in the lungs of mice by repeated passages. The adapted strain was sequenced and assessed using hemagglutination test, EID50 and LD50 for laboratory mice. BALB/c mice were immunised once with Ad5-tet-M2NP adenovirus intranasally, and 21 days after the immunisation they were infected with a lethal dose (5 LD50) of influenza virus A/Chicken/NJ/294508-12/2004 (H7N2) in order to assess the protective properties of the recombinant adenovirus. The level of viral shedding from the lungs of the infected mice was evaluated by titration of the lung homogenates in MDCK cell culture on days 3 and 6 after infection. The level of specific antibodies to H7 avian influenza virus was determined by indirect enzyme immunoassay. Results: the use of Ad5-tet-M2NP adenovirus for immunisation of the mice ensured 100% survival of the animals that had disease symptoms (weight loss) after their infection with the lethal dose (5 LD50) of H7 avian influenza virus. The study demonstrated a high post-vaccination level of humoral immune response to H7 avian influenza virus. The virus titer decreased significantly by day 6 in the lungs of mice that had been immunised with Ad5-tet-M2NP compared to the control group. Conclusion: the Ad5-tetM2NP recombinant adenovirus can be used to create a candidate pandemic influenza vaccine that would protect against avian influenza viruses, subtype H7, in particular.
Collapse
Affiliation(s)
- E. S. Sedova
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| | - L. V. Verkhovskaya
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| | - E. A. Artemova
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| | - D. N. Shcherbinin
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| | - A. A. Lysenko
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| | - I. A. Rudneva
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| | - A. V. Lyashko
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| | - S. A. Alekseeva
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| | - I. B. Esmagambetov
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| | - T. A. Timofeeva
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| | - M. M. Shmarov
- National Research Centre for Epidemiology and Microbiology named after the honorary academician N. F. Gamaleya
| |
Collapse
|
9
|
An influenza A outbreak in Iranian individuals following Arba'een foot pilgrimage from October to December 2019. Infect Control Hosp Epidemiol 2020; 41:627-628. [PMID: 32160936 DOI: 10.1017/ice.2020.49] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
|