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Li S, Toriumi H, Takahashi D, Kamasaki T, Fujioka Y, Nagatoishi S, Li J, Liu Y, Hosokawa T, Tsumoto K, Ohba Y, Katayama Y, Murakami D, Hase K, Mori T. Safe and efficient oral allergy immunotherapy using one-pot-prepared mannan-coated allergen nanoparticles. Biomaterials 2023; 303:122381. [PMID: 37935073 DOI: 10.1016/j.biomaterials.2023.122381] [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: 03/07/2023] [Revised: 08/16/2023] [Accepted: 10/27/2023] [Indexed: 11/09/2023]
Abstract
Allergen immunotherapy (AIT) is the only curative treatment for allergic diseases. However, AIT has many disadvantages related to efficiency, safety, long-term duration, and patient compliance. Dendritic cells (DCs) have an important role in antigen-specific tolerance induction; thus, DC-targeting strategies to treat allergies such as glutaraldehyde crosslinked antigen to mannoprotein (MAN) have been established. However, glutaraldehyde crosslinking may reduce the antigen presentation efficiency of DCs. To overcome this, we developed a MAN-coated ovalbumin (OVA) nanoparticle (MDO), which uses intermolecular disulfide bond to crosslink OVA and MAN. MDO effectively targeted DCs resulting in tolerogenic DCs, and promoted higher antigen presentation efficiency by DCs compared with OVA or glutaraldehyde crosslinked nanoparticles. In vitro and in vivo experiments showed that DCs exposed to MDO induced Treg cells. Moreover, MDO had low reactivity with anti-OVA antibodies and did not induce anaphylaxis in allergic mice, demonstrating its high safety profile. In a mouse model of allergic asthma, MDO had significant preventative and therapeutic effects when administered orally or subcutaneously. Therefore, MDO represents a promising new approach for the efficient and safe treatment of allergies.
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Affiliation(s)
- Shunyi Li
- Graduate School of Systems Life Sciences, Kyushu University, Fukuoka, 819-0395, Japan
| | - Hiroki Toriumi
- Division of Biochemistry, Graduate School of Pharmaceutical Sciences, Keio University, Tokyo, 105-8512, Japan
| | - Daisuke Takahashi
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo, 105-8512, Japan
| | - Tomoko Kamasaki
- Department of Cell Physiology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, 060-8638, Japan
| | - Yoichiro Fujioka
- Department of Cell Physiology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, 060-8638, Japan
| | - Satoru Nagatoishi
- The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan; Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, 113-8656, Japan
| | - Jinting Li
- Graduate School of Systems Life Sciences, Kyushu University, Fukuoka, 819-0395, Japan
| | - Yiwei Liu
- Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka, 819-0395, Japan
| | - Takanatsu Hosokawa
- Graduate School of Systems Life Sciences, Kyushu University, Fukuoka, 819-0395, Japan
| | - Kouhei Tsumoto
- The Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639, Japan; Department of Bioengineering, School of Engineering, The University of Tokyo, Tokyo, 113-8656, Japan
| | - Yusuke Ohba
- Department of Cell Physiology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, 060-8638, Japan
| | - Yoshiki Katayama
- Graduate School of Systems Life Sciences, Kyushu University, Fukuoka, 819-0395, Japan; Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka, 819-0395, Japan; Center for Future Chemistry, Kyushu University, Fukuoka, 819-0395, Japan; International Research Center for Molecular Systems, Kyushu University, Fukuoka, 819-0395, Japan; Centre for Advanced Medicine Innovation, Kyushu University, Fukuoka, 812-8582, Japan; Department of Biomedical Engineering, Chung Yuan Christian University, Chung Li, 32023, Taiwan.
| | - Daisuke Murakami
- Department of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582, Japan.
| | - Koji Hase
- Division of Biochemistry, Faculty of Pharmacy and Graduate School of Pharmaceutical Sciences, Keio University, Tokyo, 105-8512, Japan; The Institute of Fermentation Sciences (IFeS), Faculty of Food and Agricultural Sciences, Fukushima University, Kanayagawa, Fukushima, 960-1296, Japan; International Research and Development Centre for Mucosal Vaccines, The Institute of Medical Science, The University of Tokyo (IMSUT), Tokyo, 108-8639, Japan.
| | - Takeshi Mori
- Graduate School of Systems Life Sciences, Kyushu University, Fukuoka, 819-0395, Japan; Department of Applied Chemistry, Faculty of Engineering, Kyushu University, Fukuoka, 819-0395, Japan; Center for Future Chemistry, Kyushu University, Fukuoka, 819-0395, Japan.
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Eberlein V, Ahrends M, Bayer L, Finkensieper J, Besecke JK, Mansuroglu Y, Standfest B, Lange F, Schopf S, Thoma M, Dressman J, Hesse C, Ulbert S, Grunwald T. Mucosal Application of a Low-Energy Electron Inactivated Respiratory Syncytial Virus Vaccine Shows Protective Efficacy in an Animal Model. Viruses 2023; 15:1846. [PMID: 37766253 PMCID: PMC10535182 DOI: 10.3390/v15091846] [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: 08/09/2023] [Revised: 08/28/2023] [Accepted: 08/29/2023] [Indexed: 09/29/2023] Open
Abstract
Respiratory syncytial virus (RSV) is a leading cause of acute lower respiratory tract infections in the elderly and in children, associated with pediatric hospitalizations. Recently, first vaccines have been approved for people over 60 years of age applied by intramuscular injection. However, a vaccination route via mucosal application holds great potential in the protection against respiratory pathogens like RSV. Mucosal vaccines induce local immune responses, resulting in a fast and efficient elimination of respiratory viruses after natural infection. Therefore, a low-energy electron irradiated RSV (LEEI-RSV) formulated with phosphatidylcholine-liposomes (PC-LEEI-RSV) was tested ex vivo in precision cut lung slices (PCLSs) for adverse effects. The immunogenicity and protective efficacy in vivo were analyzed in an RSV challenge model after intranasal vaccination using a homologous prime-boost immunization regimen. No side effects of PC-LEEI-RSV in PCLS and an efficient antibody induction in vivo could be observed. In contrast to unformulated LEEI-RSV, the mucosal vaccination of mice with PC formulated LEEI-RSV showed a statistically significant reduction in viral load after challenge. These results are a proof-of-principle for the use of LEEI-inactivated viruses formulated with liposomes to be administered intranasally to induce a mucosal immunity that could also be adapted for other respiratory viruses.
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Affiliation(s)
- Valentina Eberlein
- Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany; (V.E.)
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
| | - Mareike Ahrends
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
- Fraunhofer Institute for Toxicology and Experimental Medicine, 30625 Hannover, Germany
| | - Lea Bayer
- Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany; (V.E.)
| | - Julia Finkensieper
- Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany; (V.E.)
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
| | - Joana Kira Besecke
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
- Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, 01277 Dresden, Germany
| | - Yaser Mansuroglu
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
- Fraunhofer Institute for Translational Medicine and Pharmacology, 60596 Frankfurt, Germany
| | - Bastian Standfest
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
- Fraunhofer Institute for Manufacturing Engineering and Automation, 70569 Stuttgart, Germany
| | - Franziska Lange
- Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany; (V.E.)
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
| | - Simone Schopf
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
- Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP, 01277 Dresden, Germany
| | - Martin Thoma
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
- Fraunhofer Institute for Manufacturing Engineering and Automation, 70569 Stuttgart, Germany
| | - Jennifer Dressman
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
- Fraunhofer Institute for Translational Medicine and Pharmacology, 60596 Frankfurt, Germany
| | - Christina Hesse
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
- Fraunhofer Institute for Toxicology and Experimental Medicine, 30625 Hannover, Germany
| | - Sebastian Ulbert
- Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany; (V.E.)
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
| | - Thomas Grunwald
- Fraunhofer Institute for Cell Therapy and Immunology, 04103 Leipzig, Germany; (V.E.)
- Fraunhofer Cluster of Excellence Immune-Mediated Diseases CIMD, 60596 Frankfurt am Main, Germany (Y.M.)
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Choi HY, Kim MS, Kang YL, Choi JC, Choi IY, Jung SW, Jeong JY, Kim MC, Hwang SS, Lee SW, Park SY, Song CS, Choi IS, Lee JB. Development of a Chimeric Porcine Reproductive and Respiratory Syndrome Virus (PRRSV)-2 Vaccine Candidate Expressing Hypo-Glycosylated Glycoprotein-5 Ectodomain of Korean Lineage-1 Strain. Vet Sci 2022; 9:vetsci9040165. [PMID: 35448663 PMCID: PMC9028511 DOI: 10.3390/vetsci9040165] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 03/20/2022] [Accepted: 03/26/2022] [Indexed: 11/24/2022] Open
Abstract
Vaccination is a practical method to provide protection against porcine reproductive and respiratory syndrome virus (PRRSV), but current PRRSV vaccines show limited efficacy against divergent field strains. Lineage 1 PRRSV includes virulent strains such as NADC30 and MN184 and now has become one of the most prevalent viruses in Korea. Accordingly, there is an urgent need to develop a new vaccine for Korean lineage-1 strains. In this study, a vaccine candidate against Korean lineage-1 PRRSV, vCSL1-GP5-N33D, was developed by reverse genetics technology. vCSL1-GP5-N33D was designed as a hypo-glycosylated chimeric virus containing the glycoprotein 5 ectodomain region of the Korean lineage-1 wild-type strain. An inactivated vaccine of vCSL1-GP5-N33D was applied to a PRRS-endemic farm and elicited high serum virus neutralization (SVN) antibody titers. The vaccinated group induced SVN antibody titers of 4.40 (log2) ± 2.46, which were approximately 2-fold higher than those of the negative control at 8-weeks post-vaccination. Moreover, 60% of pigs in the vaccinated group displayed SVN antibody titers of ≥5 (log2), while none of the pigs in the negative control exhibited SVN antibody titers of ≥5 (log2). The overall results of the animal experiment suggest that the vCSL1-GP5-N33D inactivated vaccine is a promising vaccine candidate.
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Affiliation(s)
- Hwi-Yeon Choi
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
| | - Min-Sik Kim
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
| | - Yeong-Lim Kang
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
| | - Jong-Chul Choi
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
| | - In-Yeong Choi
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
| | - Sung-Won Jung
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
| | - Ji-Yun Jeong
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
- Careside Co. Ltd., Woolim Lions Valley A-B210, #146-8, Sangdaewon-dong, Jungwon-gu, Seongnam 13209, Gyeonggi-do, Korea;
| | - Min-Chul Kim
- Careside Co. Ltd., Woolim Lions Valley A-B210, #146-8, Sangdaewon-dong, Jungwon-gu, Seongnam 13209, Gyeonggi-do, Korea;
| | - Seong-Soo Hwang
- Samhwa Breedings Agri. Inc., 435, Sinjin-ri, Gwangcheon-eup, Hongseong-gun 35090, Chungcheongnam-do, Korea;
| | - Sang-Won Lee
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
- KU Research Center for Zoonosis, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Seung-Yong Park
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
- KU Research Center for Zoonosis, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Chang-Seon Song
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
- KU Research Center for Zoonosis, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - In-Soo Choi
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
- KU Research Center for Zoonosis, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Joong-Bok Lee
- Laboratory of Infectious Diseases, College of Veterinary Medicine, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea; (H.-Y.C.); (M.-S.K.); (Y.-L.K.); (J.-C.C.); (I.-Y.C.); (S.-W.J.); (J.-Y.J.); (S.-W.L.); (S.-Y.P.); (C.-S.S.); (I.-S.C.)
- KU Research Center for Zoonosis, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
- Correspondence:
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Boix-Amorós A, Piras E, Bu K, Wallach D, Stapylton M, Fernández-Sesma A, Malaspina D, Clemente JC. Viral Inactivation Impacts Microbiome Estimates in a Tissue-Specific Manner. mSystems 2021; 6:e0067421. [PMID: 34609165 PMCID: PMC8547476 DOI: 10.1128/msystems.00674-21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Accepted: 09/08/2021] [Indexed: 11/20/2022] Open
Abstract
The global emergence of novel pathogenic viruses presents an important challenge for research, as high biosafety levels are required to process samples. While inactivation of infectious agents facilitates the use of less stringent safety conditions, its effect on other biological entities of interest present in the sample is generally unknown. Here, we analyzed the effect of five inactivation methods (heat, ethanol, formaldehyde, psoralen, and TRIzol) on microbiome composition and diversity in samples collected from four different body sites (gut, nasal, oral, and skin) and compared them against untreated samples from the same tissues. We performed 16S rRNA gene sequencing and estimated abundance and diversity of bacterial taxa present in all samples. Nasal and skin samples were the most affected by inactivation, with ethanol and TRIzol inducing the largest changes in composition, and heat, formaldehyde, TRIzol, and psoralen inducing the largest changes in diversity. Oral and stool microbiomes were more robust to inactivation, with no significant changes in diversity and only moderate changes in composition. Firmicutes was the taxonomic group least affected by inactivation, while Bacteroidetes had a notable enrichment in nasal samples and moderate enrichment in fecal and oral samples. Actinobacteria were more notably depleted in fecal and skin samples, and Proteobacteria exhibited a more variable behavior depending on sample type and inactivation method. Overall, our results demonstrate that inactivation methods can alter the microbiome in a tissue-specific manner and that careful consideration should be given to the choice of method based on the sample type under study. IMPORTANCE Understanding how viral infections impact and are modulated by the microbiome is an important problem in basic research but is also of high clinical relevance under the current pandemic. To facilitate the study of interactions between microbial communities and pathogenic viruses under safe conditions, the infectious agent is generally inactivated prior to processing samples. The effect of this inactivation process in the microbiome is, however, unknown. Further, it is unclear whether biases introduced by inactivation methods are dependent on the sample type under study. Estimating the magnitude and nature of the changes induced by different methods in samples collected from various body sites thus provides important information for current and future studies that require inactivation of pathogenic agents.
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Affiliation(s)
- Alba Boix-Amorós
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Enrica Piras
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Kevin Bu
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - David Wallach
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Matthew Stapylton
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
| | - Ana Fernández-Sesma
- Department of Microbiology, Icahn School of Medicine at Mount Sinai. New York, New York, USA
| | - Dolores Malaspina
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Department of Neuroscience, Icahn School of Medicine at Mount Sinai. New York, New York, USA
| | - Jose C. Clemente
- Department of Genetics and Genomic Sciences, Icahn School of Medicine at Mount Sinai, New York, New York, USA
- Precision Immunology Institute, Icahn School of Medicine at Mount Sinai, New York, New York, USA
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Irradiation by a Combination of Different Peak-Wavelength Ultraviolet-Light Emitting Diodes Enhances the Inactivation of Influenza A Viruses. Microorganisms 2020; 8:microorganisms8071014. [PMID: 32650492 PMCID: PMC7409356 DOI: 10.3390/microorganisms8071014] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2020] [Revised: 07/02/2020] [Accepted: 07/06/2020] [Indexed: 12/30/2022] Open
Abstract
Influenza A viruses (IAVs) pose a serious global threat to humans and their livestock. This study aimed to determine the ideal irradiation by ultraviolet-light emitting diodes (UV-LEDs) for IAV disinfection. We irradiated the IAV H1N1 subtype with 4.8 mJ/cm2 UV using eight UV-LEDs [peak wavelengths (WL) = 365, 310, 300, 290, 280, 270, and 260 nm)] or a mercury low pressure (LP)-UV lamp (Peak WL = 254 nm). Inactivation was evaluated by the infection ratio of Madin–Darby canine kidney (MDCK) cells or chicken embryonated eggs. Irradiation by the 260 nm UV-LED showed the highest inactivation among all treatments. Because the irradiation-induced inactivation effects strongly correlated with damage to viral RNA, we calculated the correlation coefficient (RAE) between the irradiant spectrum and absorption of viral RNA. The RAE scores strongly correlated with the inactivation by the UV-LEDs and LP-UV lamp. To increase the RAE score, we combined three different peak WL UV-LEDs (hybrid UV-LED). The hybrid UV-LED (RAE = 86.3) significantly inactivated both H1N1 and H6N2 subtypes to a greater extent than 260 nm (RAE = 68.6) or 270 nm (RAE = 42.2) UV-LEDs. The RAE score is an important factor for increasing the virucidal effects of UV-LED irradiation.
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He X, Wang W, Chen G, Jiao P, Ji Z, Yang L, Wei P. Serological study reveal different antigenic IBDV strains prevalent in southern China during the years 2000-2017 and also the antigenic differences between the field strains and the commonly used vaccine strains. Vet Microbiol 2019; 239:108458. [PMID: 31767074 DOI: 10.1016/j.vetmic.2019.108458] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2019] [Revised: 10/09/2019] [Accepted: 10/09/2019] [Indexed: 10/25/2022]
Abstract
The aim of this study was to determine the antigenic relatedness of Infectious Bursal Disease Viruses (IBDVs) in the field in southern China during the period 2000-2017, as well as the antigenic relationship between the field strains and the most commonly used vaccine strains by using a virus neutralization (VN) test in vitro. The antigenic relatedness (R) value and the difference in VN titers were analyzed, and the antigenic index based on the sequences of the hypervariable region of VP2 (vVP2) of the strains was further evaluated. As a result, the R value of representative field strains showed that there were three subtypes present in the field strains examined, with 7 strains belonging to subtype 1, while strains BH11 and JS7 belonged to subtype 2 and subtype 3, respectively. The commonly used vaccine strains B87 and FW2512 belonged to subtype 1. The analysis of the VN titer differences revealed that all the 136 field strains were classified into subtype 1, except BH11 and JS7. All the field strains in subtype 1 have been divided into at least 5 subgroups, suggesting the antigenic diversity among these strains. The antigenic index based on IBDV-VP2 sequences further confirmed the antigenic differences between the three subtype strains and also the antigenic diversity among the subtype 1. The results demonstrated the antigenic diversity of field IBDVs in southern China during the years 2000-2017 and the antigenic differences between the field strains and the commonly used vaccine strains. This would indicate that the commonly used vaccines are only partially effective. These results enhance our understanding of IBDV genetic evolution and should help to develop more effective vaccines for the control of this disease in the future.
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Affiliation(s)
- Xiumiao He
- School of Marine Sciences and Biotechnology/Guangxi Colleges and Universities Key Laboratory of Utilization of Microbial and Botanical Resources, Guangxi University for Nationalities, Nanning, Guangxi 530006, China; Institute for Poultry Science and Health, Guangxi University, Nanning, Guangxi 530004, China; Guangxi Key Laboratory Cultivation Base for Polysaccharide Materials and Modifications, Guangxi University for Nationalities, Nanning, Guangxi 530006, China.
| | - Weiwei Wang
- Institute for Poultry Science and Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Guo Chen
- Institute for Poultry Science and Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Pengtao Jiao
- Institute for Poultry Science and Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Zhonghua Ji
- Institute for Poultry Science and Health, Guangxi University, Nanning, Guangxi 530004, China
| | - Lin Yang
- School of Marine Sciences and Biotechnology/Guangxi Colleges and Universities Key Laboratory of Utilization of Microbial and Botanical Resources, Guangxi University for Nationalities, Nanning, Guangxi 530006, China
| | - Ping Wei
- Institute for Poultry Science and Health, Guangxi University, Nanning, Guangxi 530004, China.
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Nishisaka-Nonaka R, Mawatari K, Yamamoto T, Kojima M, Shimohata T, Uebanso T, Nakahashi M, Emoto T, Akutagawa M, Kinouchi Y, Wada T, Okamoto M, Ito H, Yoshida KI, Daidoji T, Nakaya T, Takahashi A. Irradiation by ultraviolet light-emitting diodes inactivates influenza a viruses by inhibiting replication and transcription of viral RNA in host cells. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 189:193-200. [PMID: 30391908 DOI: 10.1016/j.jphotobiol.2018.10.017] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Revised: 10/11/2018] [Accepted: 10/18/2018] [Indexed: 10/28/2022]
Abstract
Influenza A viruses (IAVs) pose a serious global threat to humans and their livestock, especially poultry and pigs. This study aimed to investigate how to inactivate IAVs by using different ultraviolet-light-emitting diodes (UV-LEDs). We developed sterilization equipment with light-emitting diodes (LEDs) those peak wavelengths were 365 nm (UVA-LED), 310 nm (UVB-LED), and 280 nm (UVC-LED). These UV-LED irradiations decreased dose fluence-dependent plaque-forming units of IAV H1N1 subtype (A/Puerto Rico/8/1934) infected Madin-Darby canine kidney (MDCK) cells, but the inactivation efficiency of UVA-LED was significantly lower than UVB- and UVC-LED. UV-LED irradiations did not alter hemagglutination titer, but decreased accumulation of intracellular total viral RNA in infected MDCK cells was observed. Additionally, UV-LED irradiations suppressed the accumulation of intracellular mRNA (messenger RNA), vRNA (viral RNA), and cRNA (complementary RNA), as measured by strand-specific RT-PCR. These results suggest that UV-LEDs inhibit host cell replication and transcription of viral RNA. Both UVB- and UVC-LED irradiation decreased focus-forming unit (FFU) of H5N1 subtype (A/Crow/Kyoto/53/2004), a highly pathogenic avian IAV (HPAI), in infected MDCK cells, and the amount of FFU were lower than the H1N1 subtype. From these results, it appears that IAVs may have different sensitivity among the subtypes, and UVB- and UVC-LED may be suitable for HPAI virus inactivation.
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Affiliation(s)
- Risa Nishisaka-Nonaka
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan
| | - Kazuaki Mawatari
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan.
| | - Tomomi Yamamoto
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan
| | - Mizuki Kojima
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan
| | - Takaaki Shimohata
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan
| | - Takashi Uebanso
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan
| | - Mutsumi Nakahashi
- Graduate School of Bioscience and Bioindustry, Tokushima University, Minamijyousanjima-cho 2-1, Tokushima City, Tokushima 770-8506, Japan
| | - Takahiro Emoto
- Graduate School of Science and Technology, Tokushima University, Minamijyousanjima-cho 2-1, Tokushima City, Tokushima 770-8506, Japan
| | - Masatake Akutagawa
- Graduate School of Science and Technology, Tokushima University, Minamijyousanjima-cho 2-1, Tokushima City, Tokushima 770-8506, Japan
| | - Yohsuke Kinouchi
- Graduate School of Science and Technology, Tokushima University, Minamijyousanjima-cho 2-1, Tokushima City, Tokushima 770-8506, Japan
| | - Takahiro Wada
- Nihon Funen Co., Ltd, 179-1 Mitsujima-shinden, Kawashima-cho, Yoshinogawa City, Tokushima 779-3394, Japan
| | - Masayuki Okamoto
- Nihon Funen Co., Ltd, 179-1 Mitsujima-shinden, Kawashima-cho, Yoshinogawa City, Tokushima 779-3394, Japan
| | - Hiroshi Ito
- Nihon Funen Co., Ltd, 179-1 Mitsujima-shinden, Kawashima-cho, Yoshinogawa City, Tokushima 779-3394, Japan
| | - Ken-Ichi Yoshida
- Nihon Funen Co., Ltd, 179-1 Mitsujima-shinden, Kawashima-cho, Yoshinogawa City, Tokushima 779-3394, Japan
| | - Tomo Daidoji
- Department of Infectious Diseases, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Takaaki Nakaya
- Department of Infectious Diseases, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 465 Kajii-cho, Kawaramachi-Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan
| | - Akira Takahashi
- Department of Preventive Environment and Nutrition, Institute of Biomedical Sciences, Tokushima University Graduate School, Kuramoto-cho 3-18-15, Tokushima City, Tokushima 770-8503, Japan
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8
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Bayer L, Fertey J, Ulbert S, Grunwald T. Immunization with an adjuvanted low-energy electron irradiation inactivated respiratory syncytial virus vaccine shows immunoprotective activity in mice. Vaccine 2018; 36:1561-1569. [DOI: 10.1016/j.vaccine.2018.02.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 01/31/2018] [Accepted: 02/05/2018] [Indexed: 12/23/2022]
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9
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Erasmus JH, Weaver SC. Biotechnological Applications of an Insect-Specific Alphavirus. DNA Cell Biol 2017; 36:1045-1049. [PMID: 29161110 DOI: 10.1089/dna.2017.4019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The coupling of viral and arthropod host diversity, with evolving methods of virus discovery, has resulted in the identification and classification of a growing number of novel insect-specific viruses (ISVs) that appear to be evolutionarily related to many human pathogens but have either lost or have yet to gain the ability to replicate in vertebrates. The discovery of ISVs has raised many questions as to the origin and evolution of many human pathogenic viruses and points to the role that arthropods may play in this evolutionary process. Furthermore, the use of ISVs to control the transmission of arthropod-borne viruses has been proposed and demonstrated experimentally. Previously, our laboratory reported on the discovery and characterization of Eilat virus (EILV), an insect-specific alphavirus that phylogenetically groups within the mosquito-borne clade of medically relevant alphaviruses, including eastern equine encephalitis virus (EEEV) and Venezuelan equine encephalitis virus (VEEV), as well as chikungunya virus (CHIKV). Despite its evolutionary relationship to these human pathogens, EILV is unable to replicate in vertebrate cells due to blocks at attachment/entry and RNA replication. We recently demonstrated that, using a chimeric virus approach, EILV could be utilized as a platform for vaccine and diagnostic development, serving as a proof-of-concept for other ISVs. Due to the vast abundance of ISVs, there is an untapped resource for the development of vaccines and diagnostics for a variety of human pathogens and further work in this area is warranted.
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Affiliation(s)
- Jesse H Erasmus
- 1 Institute for Human Infections and Immunity and Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas.,2 Pre-Clinical Vaccine Development, Infectious Disease Research Institute , Seattle, Washington
| | - Scott C Weaver
- 1 Institute for Human Infections and Immunity and Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas
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10
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Diseases Primarily Affecting the Reproductive System. Vet Med (Auckl) 2017. [PMCID: PMC7150237 DOI: 10.1016/b978-0-7020-5246-0.00018-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Erasmus JH, Auguste AJ, Kaelber JT, Luo H, Rossi SL, Fenton K, Leal G, Kim DY, Chiu W, Wang T, Frolov I, Nasar F, Weaver SC. A chikungunya fever vaccine utilizing an insect-specific virus platform. Nat Med 2016; 23:192-199. [PMID: 27991917 DOI: 10.1038/nm.4253] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2016] [Accepted: 11/10/2016] [Indexed: 12/19/2022]
Abstract
Traditionally, vaccine development involves tradeoffs between immunogenicity and safety. Live-attenuated vaccines typically offer rapid and durable immunity but have reduced safety when compared to inactivated vaccines. In contrast, the inability of inactivated vaccines to replicate enhances safety at the expense of immunogenicity, often necessitating multiple doses and boosters. To overcome these tradeoffs, we developed the insect-specific alphavirus, Eilat virus (EILV), as a vaccine platform. To address the chikungunya fever (CHIKF) pandemic, we used an EILV cDNA clone to design a chimeric virus containing the chikungunya virus (CHIKV) structural proteins. The recombinant EILV/CHIKV was structurally identical at 10 Å to wild-type CHIKV, as determined by single-particle cryo-electron microscopy, and it mimicked the early stages of CHIKV replication in vertebrate cells from attachment and entry to viral RNA delivery. Yet the recombinant virus remained completely defective for productive replication, providing a high degree of safety. A single dose of EILV/CHIKV produced in mosquito cells elicited rapid (within 4 d) and long-lasting (>290 d) neutralizing antibodies that provided complete protection in two different mouse models. In nonhuman primates, EILV/CHIKV elicited rapid and robust immunity that protected against viremia and telemetrically monitored fever. Our EILV platform represents the first structurally native application of an insect-specific virus in preclinical vaccine development and highlights the potential application of such viruses in vaccinology.
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Affiliation(s)
- Jesse H Erasmus
- Institute for Translational Science, University of Texas Medical Branch, Galveston, Texas, USA.,Institute of Human Infections and Immunity, and Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, Texas, USA
| | - Albert J Auguste
- Institute of Human Infections and Immunity, and Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, Texas, USA.,Department of Pathology, University of Texas Medical Branch, Galveston, Texas, USA
| | - Jason T Kaelber
- National Center for Macromolecular Imaging, Verna and Marrs McLean Department of Biochemistry and Molecular Biology and Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Huanle Luo
- Institute of Human Infections and Immunity, and Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, Texas, USA
| | - Shannan L Rossi
- Institute of Human Infections and Immunity, and Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, Texas, USA.,Department of Pathology, University of Texas Medical Branch, Galveston, Texas, USA
| | - Karla Fenton
- Institute of Human Infections and Immunity, and Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, Texas, USA
| | - Grace Leal
- Institute of Human Infections and Immunity, and Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, Texas, USA
| | - Dal Y Kim
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Wah Chiu
- National Center for Macromolecular Imaging, Verna and Marrs McLean Department of Biochemistry and Molecular Biology and Department of Molecular Virology and Microbiology, Baylor College of Medicine, Houston, Texas, USA
| | - Tian Wang
- Institute of Human Infections and Immunity, and Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, Texas, USA
| | - Ilya Frolov
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, USA
| | - Farooq Nasar
- Virology Division, United States Army Medical Research Institute of Infectious Diseases, Frederick, Maryland, USA
| | - Scott C Weaver
- Institute for Translational Science, University of Texas Medical Branch, Galveston, Texas, USA.,Institute of Human Infections and Immunity, and Sealy Center for Vaccine Development, University of Texas Medical Branch, Galveston, Texas, USA.,Department of Pathology, University of Texas Medical Branch, Galveston, Texas, USA.,Department of Microbiology and Immunology, University of Texas Medical Branch, Galveston, Texas, USA
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12
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Pathogens Inactivated by Low-Energy-Electron Irradiation Maintain Antigenic Properties and Induce Protective Immune Responses. Viruses 2016; 8:v8110319. [PMID: 27886076 PMCID: PMC5127033 DOI: 10.3390/v8110319] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Revised: 11/15/2016] [Accepted: 11/16/2016] [Indexed: 12/26/2022] Open
Abstract
Inactivated vaccines are commonly produced by incubating pathogens with chemicals such as formaldehyde or β-propiolactone. This is a time-consuming process, the inactivation efficiency displays high variability and extensive downstream procedures are often required. Moreover, application of chemicals alters the antigenic components of the viruses or bacteria, resulting in reduced antibody specificity and therefore stimulation of a less effective immune response. An alternative method for inactivation of pathogens is ionizing radiation. It acts very fast and predominantly damages nucleic acids, conserving most of the antigenic structures. However, currently used irradiation technologies (mostly gamma-rays and high energy electrons) require large and complex shielding constructions to protect the environment from radioactivity or X-rays generated during the process. This excludes them from direct integration into biological production facilities. Here, low-energy electron irradiation (LEEI) is presented as an alternative inactivation method for pathogens in liquid solutions. LEEI can be used in normal laboratories, including good manufacturing practice (GMP)- or high biosafety level (BSL)-environments, as only minor shielding is necessary. We show that LEEI efficiently inactivates different viruses (influenza A (H3N8), porcine reproductive and respiratory syndrome virus (PRRSV), equine herpesvirus 1 (EHV-1)) and bacteria (Escherichia coli) and maintains their antigenicity. Moreover, LEEI-inactivated influenza A viruses elicit protective immune responses in animals, as analyzed by virus neutralization assays and viral load determination upon challenge. These results have implications for novel ways of developing and manufacturing inactivated vaccines with improved efficacy.
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13
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Psoralen Inactivation of Viruses: A Process for the Safe Manipulation of Viral Antigen and Nucleic Acid. Viruses 2015; 7:5875-88. [PMID: 26569291 PMCID: PMC4664985 DOI: 10.3390/v7112912] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 11/03/2015] [Accepted: 11/04/2015] [Indexed: 02/04/2023] Open
Abstract
High consequence human pathogenic viruses must be handled at biosafety level 2, 3 or 4 and must be rendered non-infectious before they can be utilized for molecular or immunological applications at lower biosafety levels. Here we evaluate psoralen-inactivated Arena-, Bunya-, Corona-, Filo-, Flavi- and Orthomyxoviruses for their suitability as antigen in immunological processes and as template for reverse transcription PCR and sequencing. The method of virus inactivation using a psoralen molecule appears to have broad applicability to RNA viruses and to leave both the particle and RNA of the treated virus intact, while rendering the virus non-infectious.
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14
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Efficacy of a combined inactivated porcine reproductive and respiratory syndrome virus vaccine using North American and European strains in specific pathogen free pigs. Vet J 2015; 204:157-61. [DOI: 10.1016/j.tvjl.2015.02.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 01/28/2015] [Accepted: 02/03/2015] [Indexed: 11/18/2022]
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15
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Amadori M, Razzuoli E. Immune Control of PRRS: Lessons to be Learned and Possible Ways Forward. Front Vet Sci 2014; 1:2. [PMID: 26664910 PMCID: PMC4668844 DOI: 10.3389/fvets.2014.00002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 05/19/2014] [Indexed: 12/29/2022] Open
Abstract
Porcine reproductive and respiratory syndrome (PRRS) is an elusive model of host/virus relationship in which disease is determined by virus pathogenicity, pig breed susceptibility and phenotype, microbial infectious pressure, and environmental conditions. The disease can be controlled by farm management programs, which can be supported by vaccination or conditioning of animals to circulating PRRS virus (PRRSV) strains. Yet, PRRS still represents a cause of heavy losses for the pig industry worldwide. Immunological control strategies are often compounded by poor and late development of adaptive immunity in both vaccinated and infected animals. Also, there is evidence that results of field trials can be worse than those of experimental studies in isolation facilities. Neutralizing antibody (NA) was shown to prevent PRRSV infection. Instead, the role of NA and adaptive immunity on the whole in virus clearance after established PRRSV infections is still contentious. Pigs eventually eliminate PRRSV infection, which may be correlated with an “educated,” innate immune response, which may also develop following vaccination. In addition to vaccination, an immunomodulation strategy for PRRS can be reasonably advocated in pig “problem” farms, where a substantial control of disease prevalence and disease-related losses is badly needed. This is not at odds with vaccination, which should be preferably restricted to PRRSV-free animals bound for PRRSV-infected farm units. Oral, low-dose, interferon-α treatments proved effective on farm for the control of respiratory and reproductive disease outbreaks, whereas the results were less clear in isolation facilities. Having in mind the crucial interaction between PRRSV and bacterial lipopolysaccharides for occurrence of respiratory disease, the strong control actions of low-dose type I interferons on the inflammatory response observed in vitro and in vivo probably underlie the rapid clinical responses observed in field trials.
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Affiliation(s)
- Massimo Amadori
- Laboratory of Cellular Immunology, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna , Brescia , Italy
| | - Elisabetta Razzuoli
- Laboratory of Cellular Immunology, Istituto Zooprofilattico Sperimentale della Lombardia e dell'Emilia Romagna , Brescia , Italy
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16
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Protective humoral immune response induced by an inactivated porcine reproductive and respiratory syndrome virus expressing the hypo-glycosylated glycoprotein 5. Vaccine 2014; 32:3617-22. [PMID: 24814552 DOI: 10.1016/j.vaccine.2014.04.083] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2013] [Revised: 04/21/2014] [Accepted: 04/23/2014] [Indexed: 11/22/2022]
Abstract
Porcine reproductive and respiratory syndrome (PRRS) causes significant economic losses to the swine industry worldwide. Although inactivated and live vaccines are commercially available for the control of PRRS, both types of vaccine have not always proven successful in terms of generating a protective immune response, particularly in the case of inactivated vaccines. In this study, we tested whether an inactivated vaccine could induce a humoral immune response to PRRS during a homologous challenge. Amino acid substitutions were introduced into glycoprotein (GP) 5 of the FL12 strain of the PRRS virus (PRRSV) using site-directed mutagenesis with a pFL12 infectious clone. The substitutions led to double deglycosylation in the putative glycosylation moieties on GP5. The mutant virus was subsequently inactivated with binary ethylenimine. The efficacy of the inactivated mutant virus was compared with that of the inactivated wild-type PRRSV. Only the inactivated mutant PRRSV induced serum neutralizing antibodies at six weeks post-vaccination. The group that was administered the inactivated mutant virus twice exhibited a significantly increased neutralizing antibody titer after a challenge with the virulent homologous strain and exhibited more rapid clearing of viremia compared to other groups, including the groups that were administered either the inactivated mutant or wild-type virus only once and the group that was administered the inactivated wild-type virus twice. Histopathological examination of lung tissue sections revealed that the group that was administered the inactivated mutant virus twice exhibited significantly thinner alveolar septa, whereas the thickness of the alveolar septa of the other groups were markedly increased due to lymphocyte infiltration. These results indicated that the deglycosylation of GP5 enhanced the immunogenicity of the inactivated mutant PRRSV and that twice administrations of the inactivated mutant virus conferred better protection against the homologous challenge. These findings suggest that the inactivated PRRSV that expresses a hypo-glycosylated GP5 is a potential inactivated vaccine candidate and a valuable tool for controlling PRRS for the swine industry.
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17
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Delrue I, Verzele D, Madder A, Nauwynck HJ. Inactivated virus vaccines from chemistry to prophylaxis: merits, risks and challenges. Expert Rev Vaccines 2012; 11:695-719. [PMID: 22873127 DOI: 10.1586/erv.12.38] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The aim of this review is to make researchers aware of the benefits of an efficient quality control system for prediction of a developed vaccine's efficacy. Two major goals should be addressed when inactivating a virus for vaccine purposes: first, the infectious virus should be inactivated completely in order to be safe, and second, the viral epitopes important for the induction of protective immunity should be conserved after inactivation in order to have an antigen of high quality. Therefore, some problems associated with the virus inactivation process, such as virus aggregate formation, protein crosslinking, protein denaturation and degradation should be addressed before testing an inactivated vaccine in vivo.
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Affiliation(s)
- Iris Delrue
- Laboratory of Virology, Department of Virology, Parasitology and Immunology, Ghent University, Merelbeke, Belgium
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18
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Geldhof MF, Vanhee M, Van Breedam W, Van Doorsselaere J, Karniychuk UU, Nauwynck HJ. Comparison of the efficacy of autogenous inactivated Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) vaccines with that of commercial vaccines against homologous and heterologous challenges. BMC Vet Res 2012; 8:182. [PMID: 23031319 PMCID: PMC3514241 DOI: 10.1186/1746-6148-8-182] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2012] [Accepted: 09/23/2012] [Indexed: 11/11/2022] Open
Abstract
Background The porcine reproductive and respiratory syndrome virus (PRRSV) is a rapidly evolving pathogen of swine. At present, there is a high demand for safe and more effective vaccines that can be adapted regularly to emerging virus variants. A recent study showed that, by the use of a controlled inactivation procedure, an experimental BEI-inactivated PRRSV vaccine can be developed that offers partial protection against homologous challenge with the prototype strain LV. At present, it is however not known if this vaccine can be adapted to currently circulating virus variants. In this study, two recent PRRSV field isolates (07 V063 and 08 V194) were used for BEI-inactivated vaccine production. The main objective of this study was to assess the efficacy of these experimental BEI-inactivated vaccines against homologous and heterologous challenge and to compare it with an experimental LV-based BEI-inactivated vaccine and commercial inactivated and attenuated vaccines. In addition, the induction of challenge virus-specific (neutralizing) antibodies by the different vaccines was assessed. Results In a first experiment (challenge with 07 V063), vaccination with the experimental homologous (07 V063) inactivated vaccine shortened the viremic phase upon challenge with approximately 2 weeks compared to the mock-vaccinated control group. Vaccination with the commercial attenuated vaccines reduced the duration of viremia with approximately one week compared to the mock-vaccinated control group. In contrast, the experimental heterologous (LV) inactivated vaccine and the commercial inactivated vaccine did not influence viremia. Interestingly, both the homologous and the heterologous experimental inactivated vaccine induced 07 V063-specific neutralizing antibodies upon vaccination, while the commercial inactivated and attenuated vaccines failed to do so. In the second experiment (challenge with 08 V194), use of the experimental homologous (08 V194) inactivated vaccine shortened viremia upon challenge with approximately 3 weeks compared to the mock-vaccinated control group. Similar results were obtained with the commercial attenuated vaccine. The experimental heterologous (07 V063 and LV) inactivated vaccines did not significantly alter viremia. In this experiment, 08 V194-specific neutralizing antibodies were induced by the experimental homologous and heterologous inactivated vaccines and a faster appearance post challenge was observed with the commercial attenuated vaccine. Conclusions The experimental homologous inactivated vaccines significantly shortened viremia upon challenge. Despite the concerns regarding the efficacy of the commercial attenuated vaccines used on the farms where the field isolates were obtained, use of commercial attenuated vaccines clearly shortened the viremic phase upon challenge. In contrast, the experimental heterologous inactivated vaccines and the commercial inactivated vaccine had no or only a limited influence on viremia. The observation that homologous BEI-inactivated vaccines can provide a more or less standardized, predictable degree of protection against a specific virus variant suggests that such vaccines may prove useful in case virus variants emerge that escape the immunity induced by the attenuated vaccines.
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Affiliation(s)
- Marc F Geldhof
- Laboratory of Virology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, Merelbeke, 9820, Belgium.
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Nauwynck HJ, Van Gorp H, Vanhee M, Karniychuk U, Geldhof M, Cao A, Verbeeck M, Van Breedam W. Micro-Dissecting the Pathogenesis and Immune Response of PRRSV Infection Paves the Way for More Efficient PRRSV Vaccines. Transbound Emerg Dis 2012; 59 Suppl 1:50-4. [DOI: 10.1111/j.1865-1682.2011.01292.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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20
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Uittenbogaard JP, Zomer B, Hoogerhout P, Metz B. Reactions of beta-propiolactone with nucleobase analogues, nucleosides, and peptides: implications for the inactivation of viruses. J Biol Chem 2011; 286:36198-214. [PMID: 21868382 DOI: 10.1074/jbc.m111.279232] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
β-Propiolactone is often applied for inactivation of viruses and preparation of viral vaccines. However, the exact nature of the reactions of β-propiolactone with viral components is largely unknown. The purpose of the current study was to elucidate the chemical modifications occurring on nucleotides and amino acid residues caused by β-propiolactone. Therefore, a set of nucleobase analogues was treated with β-propiolactone, and reaction products were identified and quantified. NMR revealed at least one modification in either deoxyguanosine, deoxyadenosine, or cytidine after treatment with β-propiolactone. However, no reaction products were found from thymidine and uracil. The most reactive sides of the nucleobase analogues and nucleosides were identified by NMR. Furthermore, a series of synthetic peptides was used to determine the conversion of reactive amino acid residues by liquid chromatography-mass spectrometry. β-Propiolactone was shown to react with nine different amino acid residues. The most reactive residues are cysteine, methionine, and histidine and, to a lesser degree, aspartic acid, glutamic acid, tyrosine, lysine, serine, and threonine. Remarkably, cystine residues (disulfide groups) do not react with β-propiolactone. In addition, no reaction was observed for β-propiolactone with asparagine, glutamine, and tryptophan residues. β-Propiolactone modifies proteins to a larger extent than expected from current literature. In conclusion, the study determined the reactivity of β-propiolactone with nucleobase analogues, nucleosides, and amino acid residues and elucidated the chemical structures of the reaction products. The study provides detailed knowledge on the chemistry of β-propiolactone inactivation of viruses.
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Affiliation(s)
- Joost P Uittenbogaard
- Unit Vaccinology, National Institute for Public Health and the Environment, 3720 BA Bilthoven, The Netherlands
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21
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Kim H, Kim HK, Jung JH, Choi YJ, Kim J, Um CG, Hyun SB, Shin S, Lee B, Jang G, Kang BK, Moon HJ, Song DS. The assessment of efficacy of porcine reproductive respiratory syndrome virus inactivated vaccine based on the viral quantity and inactivation methods. Virol J 2011; 8:323. [PMID: 21703032 PMCID: PMC3141684 DOI: 10.1186/1743-422x-8-323] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2011] [Accepted: 06/27/2011] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND There have been many efforts to develop efficient vaccines for the control of porcine reproductive and respiratory syndrome virus (PRRSV). Although inactivated PRRSV vaccines are preferred for their safety, they are weak at inducing humoral immune responses and controlling field PRRSV infection, especially when heterologous viruses are involved. RESULTS In all groups, the sample to positive (S/P) ratio of IDEXX ELISA and the virus neutralization (VN) titer remained negative until challenge. While viremia did not reduce in the vaccinated groups, the IDEXX-ELISA-specific immunoglobulin G increased more rapidly and to significantly greater levels 7 days after the challenge in all the vaccinated groups compared to the non-vaccinated groups (p < 0.05). VN titer was significantly different in the 106 PFU/mL PRRSV vaccine-inoculated and binary ethylenimine (BEI)-inactivated groups 22 days after challenge (p < 0.05). Consequently, the inactivated vaccines tested in this study provided weak memory responses with sequential challenge without any obvious active immune responses in the vaccinated pigs. CONCLUSIONS The inactivated vaccine failed to show the humoral immunity, but it showed different immune response after the challenge compared to mock group. Although the 106 PFU/mL-vaccinated and BEI-inactivated groups showed significantly greater VN titers 22 days after challenge, all the groups were already negative for viremia.
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Affiliation(s)
- Hyunil Kim
- Optifarm Solution Inc., 48 Songnam-ri, Seonggeo-eup, Cheonan, Korea
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The minor envelope glycoproteins GP2a and GP4 of porcine reproductive and respiratory syndrome virus interact with the receptor CD163. J Virol 2009; 84:1731-40. [PMID: 19939927 DOI: 10.1128/jvi.01774-09] [Citation(s) in RCA: 156] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Porcine reproductive and respiratory syndrome virus (PRRSV) contains the major glycoprotein, GP5, as well as three other minor glycoproteins, namely, GP2a, GP3, and GP4, on the virion envelope, all of which are required for generation of infectious virions. To study their interactions with each other and with the cellular receptor for PRRSV, we have cloned each of the viral glycoproteins and CD163 receptor in expression vectors and examined their expression and interaction with each other in transfected cells by coimmunoprecipitation (co-IP) assay using monospecific antibodies. Our results show that a strong interaction exists between the GP4 and GP5 proteins, although weak interactions among the other minor envelope glycoproteins and GP5 have been detected. Both GP2a and GP4 proteins were found to interact with all the other GPs, resulting in the formation of multiprotein complex. Our results further show that the GP2a and GP4 proteins also specifically interact with the CD163 molecule. The carboxy-terminal 223 residues of the CD163 molecule are not required for interactions with either the GP2a or the GP4 protein, although these residues are required for conferring susceptibility to PRRSV infection in BHK-21 cells. Overall, we conclude that the GP4 protein is critical for mediating interglycoprotein interactions and, along with GP2a, serves as the viral attachment protein that is responsible for mediating interactions with CD163 for virus entry into susceptible host cell.
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Vanhee M, Delputte PL, Delrue I, Geldhof MF, Nauwynck HJ. Development of an experimental inactivated PRRSV vaccine that induces virus-neutralizing antibodies. Vet Res 2009; 40:63. [DOI: 10.1051/vetres/2009046] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2009] [Accepted: 08/11/2009] [Indexed: 11/14/2022] Open
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