NPJ Vaccines最新文献

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Antibody gene features associated with binding and functional activity in malaria vaccine-derived human mAbs. 与疟疾疫苗衍生人类 mAbs 的结合和功能活性相关的抗体基因特征。
IF 6.9 1区 医学
NPJ Vaccines Pub Date : 2024-08-10 DOI: 10.1038/s41541-024-00929-6
Camila H Coelho, Susanna Marquez, Bergeline C Nguemwo Tentokam, Anne D Berhe, Kazutoyo Miura, Vishal N Rao, Carole A Long, Ogobara K Doumbo, Issaka Sagara, Sara Healy, Steven H Kleinstein, Patrick E Duffy
{"title":"Antibody gene features associated with binding and functional activity in malaria vaccine-derived human mAbs.","authors":"Camila H Coelho, Susanna Marquez, Bergeline C Nguemwo Tentokam, Anne D Berhe, Kazutoyo Miura, Vishal N Rao, Carole A Long, Ogobara K Doumbo, Issaka Sagara, Sara Healy, Steven H Kleinstein, Patrick E Duffy","doi":"10.1038/s41541-024-00929-6","DOIUrl":"10.1038/s41541-024-00929-6","url":null,"abstract":"<p><p>The impact of adjuvants on malaria vaccine-induced antibody repertoire is poorly understood. Here, we characterize the impact of two adjuvants, Alhydrogel® and AS01, on antibody clonotype diversity, binding and function, post malaria vaccination. We expressed 132 recombinant anti-Pfs230D1 human monoclonal antibodies (mAbs) from participants immunized with malaria transmission-blocking vaccine Pfs230D1, formulated with either Alhydrogel® or AS01. Anti-Pfs230D1 mAbs generated by Alhydrogel® formulation showed higher binding frequency to Pfs230D1 compared to AS01 formulation, although the frequency of functional mAbs was similar between adjuvant groups. Overall, the AS01 formulation induced anti-Pfs230D1 functional antibodies from a broader array of germline sequences versus the Alhydrogel® formulation. All mAbs using IGHV1-69 gene from the Alhydrogel® cohort bound to recombinant Pfs230D1, but did not block parasite transmission to mosquitoes, similar to the IGHV1-69 mAbs isolated from the AS01 cohort. These findings may help inform vaccine design and adjuvant selection for immunization with Plasmodium antigens.</p>","PeriodicalId":19335,"journal":{"name":"NPJ Vaccines","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11316794/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141913459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamic clade transitions and the influence of vaccination on the spatiotemporal circulation of SARS-CoV-2 variants. 动态支系转换和疫苗接种对 SARS-CoV-2 变体时空循环的影响。
IF 6.9 1区 医学
NPJ Vaccines Pub Date : 2024-08-10 DOI: 10.1038/s41541-024-00933-w
Cecília Artico Banho, Beatriz de Carvalho Marques, Lívia Sacchetto, Ana Karoline Sepedro Lima, Maisa Carla Pereira Parra, Alex Ranieri Jeronimo Lima, Gabriela Ribeiro, Antonio Jorge Martins, Claudia Renata Dos Santos Barros, Maria Carolina Elias, Sandra Coccuzzo Sampaio, Svetoslav Nanev Slavov, Evandra Strazza Rodrigues, Elaine Vieira Santos, Dimas Tadeu Covas, Simone Kashima, Ricardo Augusto Brassaloti, Bruna Petry, Luan Gaspar Clemente, Luiz Lehmann Coutinho, Patricia Akemi Assato, Felipe Allan da Silva da Costa, Rejane Maria Tommasini Grotto, Mirele Daiana Poleti, Jessika Cristina Chagas Lesbon, Elisangela Chicaroni Mattos, Heidge Fukumasu, Marta Giovanetti, Luiz Carlos Junior Alcantara, Jayme A Souza-Neto, Paula Rahal, João Pessoa Araújo, Fernando Rosado Spilki, Benjamin M Althouse, Nikos Vasilakis, Maurício Lacerda Nogueira
{"title":"Dynamic clade transitions and the influence of vaccination on the spatiotemporal circulation of SARS-CoV-2 variants.","authors":"Cecília Artico Banho, Beatriz de Carvalho Marques, Lívia Sacchetto, Ana Karoline Sepedro Lima, Maisa Carla Pereira Parra, Alex Ranieri Jeronimo Lima, Gabriela Ribeiro, Antonio Jorge Martins, Claudia Renata Dos Santos Barros, Maria Carolina Elias, Sandra Coccuzzo Sampaio, Svetoslav Nanev Slavov, Evandra Strazza Rodrigues, Elaine Vieira Santos, Dimas Tadeu Covas, Simone Kashima, Ricardo Augusto Brassaloti, Bruna Petry, Luan Gaspar Clemente, Luiz Lehmann Coutinho, Patricia Akemi Assato, Felipe Allan da Silva da Costa, Rejane Maria Tommasini Grotto, Mirele Daiana Poleti, Jessika Cristina Chagas Lesbon, Elisangela Chicaroni Mattos, Heidge Fukumasu, Marta Giovanetti, Luiz Carlos Junior Alcantara, Jayme A Souza-Neto, Paula Rahal, João Pessoa Araújo, Fernando Rosado Spilki, Benjamin M Althouse, Nikos Vasilakis, Maurício Lacerda Nogueira","doi":"10.1038/s41541-024-00933-w","DOIUrl":"10.1038/s41541-024-00933-w","url":null,"abstract":"<p><p>Since 2021, the emergence of variants of concern (VOC) has led Brazil to experience record numbers of in COVID-19 cases and deaths. The expanded spread of the SARS-CoV-2 combined with a low vaccination rate has contributed to the emergence of new mutations that may enhance viral fitness, leading to the persistence of the disease. Due to limitations in the real-time genomic monitoring of new variants in some Brazilian states, we aimed to investigate whether genomic surveillance, coupled with epidemiological data and SARS-CoV-2 variants spatiotemporal spread in a smaller region, can reflect the pandemic progression at a national level. Our findings revealed three SARS-CoV-2 variant replacements from 2021 to early 2022, corresponding to the introduction and increase in the frequency of Gamma, Delta, and Omicron variants, as indicated by peaks of the Effective Reproductive Number (Reff). These distinct clade replacements triggered two waves of COVID-19 cases, influenced by the increasing vaccine uptake over time. Our results indicated that the effectiveness of vaccination in preventing new cases during the Delta and Omicron circulations was six and eleven times higher, respectively, than during the period when Gamma was predominant, and it was highly efficient in reducing the number of deaths. Furthermore, we demonstrated that genomic monitoring at a local level can reflect the national trends in the spread and evolution of SARS-CoV-2.</p>","PeriodicalId":19335,"journal":{"name":"NPJ Vaccines","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11316783/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141913460","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Inactivated rabies-based Lassa fever virus vaccine candidate LASSARAB protects nonhuman primates from lethal disease. 基于狂犬病的拉沙热候选病毒灭活疫苗 LASSARAB 可保护非人灵长类动物免受致命疾病的侵害。
IF 6.9 1区 医学
NPJ Vaccines Pub Date : 2024-08-09 DOI: 10.1038/s41541-024-00930-z
Gabrielle Scher, Catherine Yankowski, Drishya Kurup, Nicole M Josleyn, Eric R Wilkinson, Jay Wells, Jesse Steffens, Ginger Lynn, Sean Vantongeren, Xiankun Zeng, Nancy Twenhafel, Kathleen A Cashman, Matthias J Schnell
{"title":"Inactivated rabies-based Lassa fever virus vaccine candidate LASSARAB protects nonhuman primates from lethal disease.","authors":"Gabrielle Scher, Catherine Yankowski, Drishya Kurup, Nicole M Josleyn, Eric R Wilkinson, Jay Wells, Jesse Steffens, Ginger Lynn, Sean Vantongeren, Xiankun Zeng, Nancy Twenhafel, Kathleen A Cashman, Matthias J Schnell","doi":"10.1038/s41541-024-00930-z","DOIUrl":"10.1038/s41541-024-00930-z","url":null,"abstract":"<p><p>Lassa fever virus (LASV), a member of the Arenavirus family, is the etiological agent of Lassa fever, a severe hemorrhagic disease that causes considerable morbidity and mortality in the endemic areas of West Africa. LASV is a rodent-borne CDC Tier One biological threat agent and is on the World Health Organization's (WHO) Priority Pathogen list. Currently, no FDA-licensed vaccines or specific therapeutics are available. Here, we describe the efficacy of a deactivated rabies virus (RABV)-based vaccine encoding the glycoprotein precursor (GPC) of LASV (LASSARAB). Nonhuman primates (NHPs) were administered a two-dose regimen of LASSARAB or an irrelevant RABV-based vaccine to serve as a negative control. NHPs immunized with LASSARAB developed strong humoral responses to LASV-GPC. Upon challenge, NHPs vaccinated with LASSARAB survived to the study endpoint, whereas NHPs in the control group did not. This study demonstrates that LASSARAB is a worthy candidate for continued development.</p>","PeriodicalId":19335,"journal":{"name":"NPJ Vaccines","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11315998/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141913461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Determination of DTaP vaccine potency by multiplex immunogenicity testing using electrochemiluminescence. 利用电化学发光法进行多重免疫原性测试,确定百白破疫苗的效力。
IF 6.9 1区 医学
NPJ Vaccines Pub Date : 2024-08-07 DOI: 10.1038/s41541-024-00915-y
Bärbel Friedrichs, Simone Rehg, Kay-Martin Hanschmann, Volker Öppling, Isabelle Bekeredjian-Ding
{"title":"Determination of DTaP vaccine potency by multiplex immunogenicity testing using electrochemiluminescence.","authors":"Bärbel Friedrichs, Simone Rehg, Kay-Martin Hanschmann, Volker Öppling, Isabelle Bekeredjian-Ding","doi":"10.1038/s41541-024-00915-y","DOIUrl":"10.1038/s41541-024-00915-y","url":null,"abstract":"<p><p>Lot release testing of diphtheria, tetanus and acellular pertussis vaccines traditionally relied on in vivo protection models involving challenge of laboratory animals with toxins. Meanwhile, many labs have switched to serological testing of these vaccines, which is often performed in separate in vivo assays, even if all components were formulated into one vaccine product. Here we describe the results of simultaneous serological potency determination of diphtheria (D), tetanus (T) and acellular pertussis (aP) antigens obtained following immunization of guinea pigs with multicomponent pediatric and booster vaccines from different manufacturers. The 4th World Health Organization (WHO) International Standard (IS) for diphtheria toxoid (No. 07/216) and the 4th WHO IS for tetanus toxoid (No. 08/218) were used as reference preparations. For aP, a pediatric vaccine batch containing the antigens pertussis toxoid, filamentous hemagglutinin, pertactin and fimbriae proteins type 2/3 was established as internal control. Quantification of IgG against D, T and aP antigens in guinea pig sera was performed using a hexaplex electrochemiluminescence immunoassay. We further provide proof-of-concept using experimental vaccine samples lacking or containing reduced amounts of diphtheria toxoid in the presence of full amounts of tetanus and pertussis antigens and alum adjuvant. Importantly, the assay confirmed dose-response relationships for all antigens tested and was able to detect diphtheria out-of-specification batches. The results confirmed the suitability of the protocol for combined serology batch release testing of DTaP combination vaccines as first measure towards implementation of full in vitro testing of DTaP vaccines. This report summarizes the data and the protocol used for validation prior to implementation of this method in routine batch release testing of DTaP vaccines, which led to replacement of in vivo challenge experiments in our laboratory following the 3 R (replace, reduce, refine) principle.</p>","PeriodicalId":19335,"journal":{"name":"NPJ Vaccines","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11306252/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141902509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Tick-borne encephalitis vaccine breakthrough infections induce aberrant T cell and antibody responses to non-structural proteins. 蜱传脑炎疫苗突破性感染会诱导T细胞和抗体对非结构蛋白产生异常反应。
IF 6.9 1区 医学
NPJ Vaccines Pub Date : 2024-08-07 DOI: 10.1038/s41541-024-00936-7
Amare Aregay, Jan Slunečko, Miša Korva, Petra Bogovic, Katarina Resman Rus, Nataša Knap, Jana Beicht, Mareike Kubinski, Giulietta Saletti, Tatjana Avšič-Županc, Imke Steffen, Franc Strle, Albert D M E Osterhaus, Guus F Rimmelzwaan
{"title":"Tick-borne encephalitis vaccine breakthrough infections induce aberrant T cell and antibody responses to non-structural proteins.","authors":"Amare Aregay, Jan Slunečko, Miša Korva, Petra Bogovic, Katarina Resman Rus, Nataša Knap, Jana Beicht, Mareike Kubinski, Giulietta Saletti, Tatjana Avšič-Županc, Imke Steffen, Franc Strle, Albert D M E Osterhaus, Guus F Rimmelzwaan","doi":"10.1038/s41541-024-00936-7","DOIUrl":"10.1038/s41541-024-00936-7","url":null,"abstract":"<p><p>Tick-borne encephalitis virus (TBEV) vaccine breakthrough (VBT) infections are not uncommon in endemic areas. The clinical and immunological outcomes have been poorly investigated. We assessed the magnitude and specificity of virus-specific antibody and T cell responses after TBE in previously vaccinated subjects and compared the results with those of unvaccinated TBE patients and study subjects that received vaccination without VBT infection. Symptomatic TBEV infection of unvaccinated study subjects induced virus-specific antibody responses to the E protein and non-structural protein 1 (NS1) as well as T cell responses to structural and other non-structural (NS) proteins. After VBT infections, significantly impaired NS1-specific antibody responses were observed, while the virus-specific T cell responses to the NS proteins were relatively strong. VBT infection caused predominantly moderate to severe disease during hospitalization. The level of TBEV EDIII- and NS1-specific antibodies in unvaccinated convalescent patients inversely correlated with TBE severity and neurological symptoms early after infection.</p>","PeriodicalId":19335,"journal":{"name":"NPJ Vaccines","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11306791/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141902510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A randomized study to evaluate the safety and immunogenicity of a pentavalent meningococcal vaccine. 评估五价脑膜炎球菌疫苗安全性和免疫原性的随机研究。
IF 6.9 1区 医学
NPJ Vaccines Pub Date : 2024-08-07 DOI: 10.1038/s41541-024-00935-8
Yoonjin Kim, Sungyeun Bae, Kyung-Sang Yu, SeungHwan Lee, Chankyu Lee, Jinil Kim, Howard Her, Jaeseong Oh
{"title":"A randomized study to evaluate the safety and immunogenicity of a pentavalent meningococcal vaccine.","authors":"Yoonjin Kim, Sungyeun Bae, Kyung-Sang Yu, SeungHwan Lee, Chankyu Lee, Jinil Kim, Howard Her, Jaeseong Oh","doi":"10.1038/s41541-024-00935-8","DOIUrl":"10.1038/s41541-024-00935-8","url":null,"abstract":"<p><p>A randomized, active-controlled, double-blind, first-in-human, phase 1 study was conducted in healthy Korean adults to evaluate the safety, tolerability, and immunogenicity of EuNmCV-5, a new pentavalent meningococcal vaccine targeting serogroups A, C, W, X, and Y. Sixty participants randomly received a single dose of either EuNmCV-5 or MenACWY-CRM, a quadrivalent vaccine containing serogroups A, C, W, and Y. Safety was assessed through monitoring anaphylactic reactions, adverse events for 28 days, and serious adverse events over 180 days. Immunogenicity was assessed via rabbit complement-dependent serum bactericidal antibody (rSBA) assay. EuNmCV-5 was safe, well-tolerated, and elicited a substantial antibody titer increase. The seroprotection rates exceeded 96.7%, and the seroconversion rates were over 85% for all the targeted serogroups. It showed higher seroconversion rates against serogroups A and C (p = 0.0016 and 0.0237, respectively) and elicited a substantial increase in GMT for all targeted serogroups compared to the MenACWY-CRM.ClinicalTrials.gov identifier: NCT05739292.</p>","PeriodicalId":19335,"journal":{"name":"NPJ Vaccines","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11306796/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141902508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Immunisation of koalas against Chlamydia pecorum results in significant protection against chlamydial disease and mortality. 对考拉进行啄木鸟衣原体免疫接种可显著预防衣原体疾病和死亡率。
IF 6.9 1区 医学
NPJ Vaccines Pub Date : 2024-08-06 DOI: 10.1038/s41541-024-00938-5
Samuel Phillips, Jon Hanger, Julien Grosmaire, Ahmed Mehdi, Martina Jelocnik, Jessie Wong, Peter Timms
{"title":"Immunisation of koalas against Chlamydia pecorum results in significant protection against chlamydial disease and mortality.","authors":"Samuel Phillips, Jon Hanger, Julien Grosmaire, Ahmed Mehdi, Martina Jelocnik, Jessie Wong, Peter Timms","doi":"10.1038/s41541-024-00938-5","DOIUrl":"10.1038/s41541-024-00938-5","url":null,"abstract":"<p><p>In 2022, the Australian Government listed the koala as endangered in several states due to habitat destruction, traffic strikes, dog attacks, and Chlamydia pecorum disease. This study evaluates a 10-year assessment of a Major Outer Membrane Protein-based vaccine's effectiveness against chlamydial disease in wild koalas from Southeast Queensland. Over a decade, 680 koalas were tracked, with five vaccine trials involving 165 koalas. While prior studies only offered up to two years of data, this study's extended period allowed a thorough evaluation of vaccine efficacy. Results showed that vaccinated koalas had significantly lower disease incidence, with a 64% reduction in chlamydial mortality. This vaccine demonstrated positive impacts on both male and female koalas, highlighting its crucial role in conserving the Australian koala population and mitigating the threats they face.</p>","PeriodicalId":19335,"journal":{"name":"NPJ Vaccines","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11303382/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141897908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mass vaccination with reassortment-impaired live H9N2 avian influenza vaccine. 使用重配受损的 H9N2 禽流感活疫苗进行大规模接种。
IF 6.9 1区 医学
NPJ Vaccines Pub Date : 2024-08-03 DOI: 10.1038/s41541-024-00923-y
Flavio Cargnin Faccin, C Joaquin Cáceres, L Claire Gay, Brittany Seibert, Nick van Bentem, Luis A Rodriguez, Ana Luiza Soares Fraiha, Matias Cardenas, Ginger Geiger, Lucia Ortiz, Silvia Carnaccini, Darrell R Kapczynski, Daniela S Rajao, Daniel R Perez
{"title":"Mass vaccination with reassortment-impaired live H9N2 avian influenza vaccine.","authors":"Flavio Cargnin Faccin, C Joaquin Cáceres, L Claire Gay, Brittany Seibert, Nick van Bentem, Luis A Rodriguez, Ana Luiza Soares Fraiha, Matias Cardenas, Ginger Geiger, Lucia Ortiz, Silvia Carnaccini, Darrell R Kapczynski, Daniela S Rajao, Daniel R Perez","doi":"10.1038/s41541-024-00923-y","DOIUrl":"10.1038/s41541-024-00923-y","url":null,"abstract":"<p><p>Avian influenza poses a severe threat to poultry production and global food security, prompting the development of vaccination programs in numerous countries. Modified live virus (MLV) vaccines, with their potential for mass application, offer a distinct advantage over existing options. However, concerns surrounding reversion, recombination, and unintended transmission have hindered the progress of MLV development for avian influenza in poultry. To address these concerns, we engineered reassortment-impaired, non-transmissible, safe, immunogenic, and protective MLVs through the rearrangement of internal gene segments and additional modifications to the surface gene segments HA and NA. The unique peptide marker aspartic acid-arginine-proline-alanine-valine-isoleucine-alanine-asparragine (DRPAVIAN) was incorporated into HA, while NA was modified to encode the chicken interleukin-18 (ckIL18) gene (MLV-H9N2-IL). In vitro, the MLV-H9N2 and MLV-H9N2-IL candidates demonstrated stability and virus titers comparable to the wild-type H9N2 strain. In chickens, the MLV-H9N2 and MLV-H9N2-IL candidates did not transmit via direct contact. Co-infection studies with wild-type virus confirmed that the altered HA and NA segments exhibited fitness disadvantages and did not reassort. Vaccinated chickens showed no clinical signs upon vaccination, all seroconverted, and the inclusion of ckIL18 in the MLV-H9N2-IL vaccine enhanced neutralizing antibody production. A significant decrease in viral loads post-challenge underscored the protective effect of the MLVs. The MLV-H9N2-IL vaccine, administered via drinking water, proved immunogenic in chickens in a dose-dependent manner, generating protective levels of neutralizing antibodies upon aggressive homologous virus challenge. In summary, this study lays the groundwork for safe MLVs against avian influenza suitable for mass vaccination efforts.</p>","PeriodicalId":19335,"journal":{"name":"NPJ Vaccines","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11297921/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141889874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Immunogenicity and biodistribution of lipid nanoparticle formulated self-amplifying mRNA vaccines against H5 avian influenza. 脂质纳米粒子配制的 H5 型禽流感自扩增 mRNA 疫苗的免疫原性和生物分布。
IF 6.9 1区 医学
NPJ Vaccines Pub Date : 2024-08-03 DOI: 10.1038/s41541-024-00932-x
Xiaole Cui, Pieter Vervaeke, Ya Gao, Lisa Opsomer, Qing Sun, Janne Snoeck, Bert Devriendt, Zifu Zhong, Niek N Sanders
{"title":"Immunogenicity and biodistribution of lipid nanoparticle formulated self-amplifying mRNA vaccines against H5 avian influenza.","authors":"Xiaole Cui, Pieter Vervaeke, Ya Gao, Lisa Opsomer, Qing Sun, Janne Snoeck, Bert Devriendt, Zifu Zhong, Niek N Sanders","doi":"10.1038/s41541-024-00932-x","DOIUrl":"10.1038/s41541-024-00932-x","url":null,"abstract":"<p><p>This study reports on the immunogenicity and biodistribution of H5 hemagglutinin (HA)-based self-amplifying (sa) mRNA vaccines in mice. Four sa-mRNA vaccines encoding either a secreted full-length HA, a secreted HA head domain, a secreted HA stalk domain, or a full-length membrane-anchored HA were investigated. All vaccines elicited an adaptive immune response. However, the full-length HA sa-RNA vaccines demonstrated superior performance compared to head and stalk domain vaccines. The antibody titers positively correlated with the vaccine dose. Cellular immune responses and antigen-specific IgA antibodies in the lungs were also observed. The comparison of the sa-mRNA vaccines encoding the secreted and membrane-anchored full-length HA revealed that anchoring of the HA to the membrane significantly enhanced the antibody and cellular responses. In addition to the injection site, the intramuscularly injected sa-mRNA-LNPs were also detected in the draining lymph nodes, spleen, and to a lesser extent, in the lung, kidney, liver, and heart.</p>","PeriodicalId":19335,"journal":{"name":"NPJ Vaccines","volume":null,"pages":null},"PeriodicalIF":6.9,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11298010/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141889873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Esoteric beliefs and CAM impact SARS-CoV-2 immunization drivers, uptake and pediatric immunization views in Germany. 神秘信仰和 CAM 对德国 SARS-CoV-2 免疫接种驱动因素、接受率和儿科免疫接种观点的影响。
IF 6.9 1区 医学
NPJ Vaccines Pub Date : 2024-08-03 DOI: 10.1038/s41541-024-00928-7
Sebastian Jäckle, James K Timmis
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