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COVID-19 vaccine knowledge and acceptance among the Libyan population: A cross-sectional study.
IF 4.1 4区 医学
Human Vaccines & Immunotherapeutics Pub Date : 2025-12-01 Epub Date: 2024-12-19 DOI: 10.1080/21645515.2024.2439590
Rana H Shembesh, Mohammed S Beshr, Mariam M ALTarhouni
{"title":"COVID-19 vaccine knowledge and acceptance among the Libyan population: A cross-sectional study.","authors":"Rana H Shembesh, Mohammed S Beshr, Mariam M ALTarhouni","doi":"10.1080/21645515.2024.2439590","DOIUrl":"https://doi.org/10.1080/21645515.2024.2439590","url":null,"abstract":"<p><p>We aim to identify Libyans' knowledge, attitudes, and acceptance regarding the COVID-19 vaccine. A cross-sectional survey was electronically distributed to the Libyan population aged 18 and older between May and September 2023. The questionnaire had three sections: socio-demographics, COVID-19 vaccination and infection, and knowledge and attitudes toward the COVID-19 vaccine. The chi-square test was used to assess the associations. A total of 1,043 respondents completed the questionnaire. Of these, 590 (56.6%) were vaccinated, and 453 (43.4%) were unvaccinated. Only age, educational level, employment status, history of COVID-19 infection, and source of information had a significant association with vaccination status; all shared a p-value <.05. However, Monthly income did not. Regarding knowledge, 63.7% agreed that vaccines in general are an effective way to prevent and control infectious diseases, and 76.6% agreed that they can prevent disease and mortality. However, regarding COVID-19 vaccine, 48.4% agreed that the benefits outweigh the risks. Regarding COVID-19 safety, 40.8% responded that COVID-19 vaccines are only slightly safe or not safe at all. COVID-19 vaccine acceptance was at 57.2%, and only age and source of information were significantly associated. Those who held favorable views were more likely to accept the vaccine, while those who had concerns about safety were more vaccine hesitant. There is a gap between the perception of the COVID-19 vaccine compared to other vaccines among Libyans. Our study revealed that 57.2% of Libyans accept the COVID-19 vaccine. However, only 34% of the Libyan population is vaccinated. A comprehensive health policy is needed.</p>","PeriodicalId":49067,"journal":{"name":"Human Vaccines & Immunotherapeutics","volume":"21 1","pages":"2439590"},"PeriodicalIF":4.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142865640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Research trends and key contributors in studies on influenza vaccines for children: A 20-year bibliometric analysis.
IF 4.1 4区 医学
Human Vaccines & Immunotherapeutics Pub Date : 2025-12-01 Epub Date: 2024-12-20 DOI: 10.1080/21645515.2024.2443281
Ning Sun, Rui Wei, Bochao Jia, Taiwei Lou, Zirong Li, Xiaowei Nie, Wenxiao Yu, Miaoran Wang, Qiuyan Li
{"title":"Research trends and key contributors in studies on influenza vaccines for children: A 20-year bibliometric analysis.","authors":"Ning Sun, Rui Wei, Bochao Jia, Taiwei Lou, Zirong Li, Xiaowei Nie, Wenxiao Yu, Miaoran Wang, Qiuyan Li","doi":"10.1080/21645515.2024.2443281","DOIUrl":"https://doi.org/10.1080/21645515.2024.2443281","url":null,"abstract":"<p><p>Globally, there are over 3 million severe cases of influenza each year, leading to up to half a million deaths. This study provides a comprehensive analysis of the current status of children's influenza vaccine research over the past 20 years and explores potential future research trends, including improvements in vaccine coverage and strategies to address vaccine hesitancy. We extracted all research data on children's influenza vaccines from 2004 to 2024 using the Web of Science Core Collection (WOSCC). The contributions of various countries/regions, institutions, authors, and journals in this field were assessed, and research hotspots as well as promising future trends were predicted through keyword analysis using CiteSpace and VOSviewer. A total of 2,598 related publications from 2004 to 2024 were identified and collected for analysis. The United States (USA) and England emerged as the leading contributors with the highest number of published papers. AstraZeneca was identified as a key leader among research institutions, and Ambrose Christopher S was recognized as the most productive author in this field. The journals <i>Vaccine</i> and <i>Human Vaccines & Immunotherapeutics</i> stood out as the most prominent publications in this area. The keyword analysis highlighted that international research collaboration maybe a promising strategy for bridging global gaps; Addressing vaccine hesitancy could potentially increase vaccination coverage; Live attenuated vaccines, intranasal administration and universal vaccines are promising directions for future development. These insights highlight potential avenues for improving influenza vaccine coverage and inform strategies to mitigate vaccine hesitancy, crucial for protecting children and enhancing public health.</p>","PeriodicalId":49067,"journal":{"name":"Human Vaccines & Immunotherapeutics","volume":"21 1","pages":"2443281"},"PeriodicalIF":4.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142865871","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influenza vaccine effectiveness against medically-attended influenza infection in 2023/24 season in Hangzhou, China.
IF 4.1 4区 医学
Human Vaccines & Immunotherapeutics Pub Date : 2025-12-01 Epub Date: 2024-12-20 DOI: 10.1080/21645515.2024.2435156
Hao Lei, Beidi Niu, Zhou Sun, Yaojing Wang, Xinren Che, Shengqiang Du, Yan Liu, Ke Zhang, Shi Zhao, Shigui Yang, Zhe Wang, Gang Zhao
{"title":"Influenza vaccine effectiveness against medically-attended influenza infection in 2023/24 season in Hangzhou, China.","authors":"Hao Lei, Beidi Niu, Zhou Sun, Yaojing Wang, Xinren Che, Shengqiang Du, Yan Liu, Ke Zhang, Shi Zhao, Shigui Yang, Zhe Wang, Gang Zhao","doi":"10.1080/21645515.2024.2435156","DOIUrl":"https://doi.org/10.1080/21645515.2024.2435156","url":null,"abstract":"<p><p>From 2020, influenza viruses circulation was largely affected by the global coronavirus disease (COVID-19) pandemic, notably leading to the extinction of the B/Yamagata lineage and raising questions about the relevance of the quadrivalent influenza vaccine, which includes this lineage. Evaluating vaccine effectiveness (VE) against influenza infections is important to inform future vaccine programs. A test-negative case-control study was conducted in five tertiary hospitals in Hangzhou, the capital city of Zhejiang province, China, enrolling medically-attended patients aged >6 months who presented with influenza-like illness (ILI) from October 1, 2023, to March 31, 2024. The VE was estimated using multivariate logistic regression models adjusted for sex, age, influenza detection methods, and influenza testing timing. Of the 157,291 medically-attended ILI participants enrolled 56,704 (36%) tested positive for influenza. Adjusted overall VE against any medically-attended influenza infection was 48% (95% Confidence interval [CI]: 46%-51%). The overall VE of the trivalent inactivated influenza vaccine (IIV3) was 59% (95% CI: 50%-66%), followed by the trivalent live attenuated vaccine (LAIV3) (VE = 53%, 95% CI: 42%-62%) and quadrivalent inactivated influenza vaccine (IIV4) (VE = 47%, 95% CI: 45%-50%). IIV3 provided even better protection against medically-attended influenza B infection than IIV4 (VE = 87%, 95% CI: 81%-92% for IIV3 versus VE = 53%, 95% CI: 50%-57% for IIV4). In the 2023/24 season in Hangzhou, China, the influenza vaccine offered moderate protection during a major epidemic. The results supported the World Health Organization recommendation to exclude the B/Yamagata lineage antigen in quadrivalent influenza vaccines in 2023.</p>","PeriodicalId":49067,"journal":{"name":"Human Vaccines & Immunotherapeutics","volume":"21 1","pages":"2435156"},"PeriodicalIF":4.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142865663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Hemostatic changes following COVID-19 vaccination: Do they promote a pro-thrombotic state?
IF 4.1 4区 医学
Human Vaccines & Immunotherapeutics Pub Date : 2025-12-01 Epub Date: 2024-12-19 DOI: 10.1080/21645515.2024.2439627
Tarinee Rungjirajittranon, Yupa Nakkinkun, Bundarika Suwanawiboon, Yingyong Chinthammitr, Weerapat Owattanapanich, Theera Ruchutrakool
{"title":"Hemostatic changes following COVID-19 vaccination: Do they promote a pro-thrombotic state?","authors":"Tarinee Rungjirajittranon, Yupa Nakkinkun, Bundarika Suwanawiboon, Yingyong Chinthammitr, Weerapat Owattanapanich, Theera Ruchutrakool","doi":"10.1080/21645515.2024.2439627","DOIUrl":"https://doi.org/10.1080/21645515.2024.2439627","url":null,"abstract":"<p><strong>Trial registration: </strong>TCTR20240812005.</p>","PeriodicalId":49067,"journal":{"name":"Human Vaccines & Immunotherapeutics","volume":"21 1","pages":"2439627"},"PeriodicalIF":4.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142865658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Number of medical facilities within driving distance of residence and influenza vaccination status in Japan: A cross-sectional study.
IF 4.1 4区 医学
Human Vaccines & Immunotherapeutics Pub Date : 2025-12-01 Epub Date: 2024-12-20 DOI: 10.1080/21645515.2024.2441407
Masaki Machida, Shigeru Inoue, Tomoki Nakaya, Shinji Fukushima, Wakaba Fukushima, Megumi Hara, Takahiro Tabuchi
{"title":"Number of medical facilities within driving distance of residence and influenza vaccination status in Japan: A cross-sectional study.","authors":"Masaki Machida, Shigeru Inoue, Tomoki Nakaya, Shinji Fukushima, Wakaba Fukushima, Megumi Hara, Takahiro Tabuchi","doi":"10.1080/21645515.2024.2441407","DOIUrl":"https://doi.org/10.1080/21645515.2024.2441407","url":null,"abstract":"<p><p>Vaccine hesitancy primarily consists of confidence, complacency, and convenience, including geographical accessibility. However, few studies in developed countries have focused on the association between geographical accessibility to vaccination services and vaccination status and previous studies have shown conflicting results. This cross-sectional study aimed to clarify the association between the number of medical facilities within a 15-minute driving distance from the place of residence and influenza vaccination status, using a large nationwide internet survey in Japan (<i>n</i> = 27,440). Postal codes were used to determine participants' place of residence and the number of medical facilities within a 15-minute drive was calculated using geographic information system data. Participants were classified into quartiles based on the number of medical facilities nearby. They reported their influenza vaccination status over the past year. Modified Poisson regression analysis was conducted with influenza vaccination status as the dependent variable and the number of medical facilities nearby as the independent variable, adjusted for covariates stratified by age (under 65 years: or 65 years and older). Among participants aged 65 years and older, those with fewer medical facilities within a 15-minute drive of their place of residence were significantly less likely to have received an influenza vaccination than those with more medical facilities nearby (prevalence ratio in Q1 relative to Q4: 0.93, 95% confidence interval 0.87-0.99). In contrast, no association was observed among participants aged under 65 years. Geographical accessibility to vaccination services may influence vaccine hesitancy among older adults in Japan, a developed country.</p>","PeriodicalId":49067,"journal":{"name":"Human Vaccines & Immunotherapeutics","volume":"21 1","pages":"2441407"},"PeriodicalIF":4.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142865853","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
State of the art of adjuvant immunotherapy in urothelial cancer: New developments and upcoming changes.
IF 4.1 4区 医学
Human Vaccines & Immunotherapeutics Pub Date : 2025-12-01 Epub Date: 2024-12-19 DOI: 10.1080/21645515.2024.2440165
Elisa Tassinari, Linda Danielli, Andrea Marchetti, Matteo Rosellini, Costantino Ricci, Pietro Piazza, Angelo Mottaran, Riccardo Schiavina, Matteo Santoni, Veronica Mollica, Francesco Massari
{"title":"State of the art of adjuvant immunotherapy in urothelial cancer: New developments and upcoming changes.","authors":"Elisa Tassinari, Linda Danielli, Andrea Marchetti, Matteo Rosellini, Costantino Ricci, Pietro Piazza, Angelo Mottaran, Riccardo Schiavina, Matteo Santoni, Veronica Mollica, Francesco Massari","doi":"10.1080/21645515.2024.2440165","DOIUrl":"https://doi.org/10.1080/21645515.2024.2440165","url":null,"abstract":"<p><p>In recent years, several clinical trials focused on the potential role of immune-checkpoint inhibitors (ICIs) in the adjuvant treatment of muscle-invasive urothelial cancer (UC). Heretofore, only the anti-programmed death protein 1 (anti-PD1) nivolumab received European Medical Agency (EMA) approval for cisplatin-unfit patients. In our work, we deeply analyzed the results of the three pivotal studies in view of the rapidly evolving therapeutic advanced UC's scenario. Furthermore, there are several ongoing research to investigate ICIs and other emerging immune agents in this setting; results are awaited. Additionally, current efforts have been made to assess the role of these agents in earlier disease settings, particularly in high-risk non-muscle-invasive bladder cancer (NMIBC). In our review, we analyzed the potential role of predictive and/or prognostic biomarkers that may improve patient selection and treatment efficacy. To conclude, we highlighted the upcoming changes that could redefine the standard of care for patients with early-stage UC.</p>","PeriodicalId":49067,"journal":{"name":"Human Vaccines & Immunotherapeutics","volume":"21 1","pages":"2440165"},"PeriodicalIF":4.1,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142865878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhanced immunity against SARS-CoV-2 in returning Chinese individuals. 提高归国华侨对 SARS-CoV-2 的免疫力。
IF 4.1 4区 医学
Human Vaccines & Immunotherapeutics Pub Date : 2024-12-31 Epub Date: 2024-01-08 DOI: 10.1080/21645515.2023.2300208
Runyu Yuan, Huimin Chen, Lina Yi, Xinxin Li, Ximing Hu, Xing Li, Huan Zhang, Pingping Zhou, Chumin Liang, Huifang Lin, Lilian Zeng, Xue Zhuang, QianQian Ruan, Yueling Chen, Yingyin Deng, Zhe Liu, Jing Lu, Jianpeng Xiao, Liang Chen, Xincai Xiao, Jing Li, Baisheng Li, Yan Li, Jianfeng He, Jiufeng Sun
{"title":"Enhanced immunity against SARS-CoV-2 in returning Chinese individuals.","authors":"Runyu Yuan, Huimin Chen, Lina Yi, Xinxin Li, Ximing Hu, Xing Li, Huan Zhang, Pingping Zhou, Chumin Liang, Huifang Lin, Lilian Zeng, Xue Zhuang, QianQian Ruan, Yueling Chen, Yingyin Deng, Zhe Liu, Jing Lu, Jianpeng Xiao, Liang Chen, Xincai Xiao, Jing Li, Baisheng Li, Yan Li, Jianfeng He, Jiufeng Sun","doi":"10.1080/21645515.2023.2300208","DOIUrl":"10.1080/21645515.2023.2300208","url":null,"abstract":"<p><p>Global COVID-19 vaccination programs effectively contained the fast spread of SARS-CoV-2. Characterizing the immunity status of returned populations will favor understanding the achievement of herd immunity and long-term management of COVID-19 in China. Individuals were recruited from 7 quarantine stations in Guangzhou, China. Blood and throat swab specimens were collected from participants, and their immunity status was determined through competitive ELISA, microneutralization assay and enzyme-linked FluoroSpot assay. A total of 272 subjects were involved in the questionnaire survey, of whom 235 (86.4%) were returning Chinese individuals and 37 (13.6%) were foreigners. Blood and throat swab specimens were collected from 108 returning Chinese individuals. Neutralizing antibodies against SARS-CoV-2 were detected in ~90% of returning Chinese individuals, either in the primary or the homologous and heterologous booster vaccination group. The serum NAb titers were significantly decreased against SARS-CoV-2 Omicron BA.5, BF.7, BQ.1 and XBB.1 compared with the prototype virus. However, memory T-cell responses, including specific IFN-γ and IL-2 responses, were not different in either group. Smoking, alcohol consumption, SARS-CoV-2 infection, COVID-19 vaccination, and the time interval between last vaccination and sampling were independent influencing factors for NAb titers against prototype SARS-CoV-2 and variants of concern. The vaccine dose was the unique common influencing factor for Omicron subvariants. Enhanced immunity against SARS-CoV-2 was established in returning Chinese individuals who were exposed to reinfection and vaccination. Domestic residents will benefit from booster homologous or heterologous COVID-19 vaccination after reopening of China, which is also useful against breakthrough infection.</p>","PeriodicalId":49067,"journal":{"name":"Human Vaccines & Immunotherapeutics","volume":"20 1","pages":"2300208"},"PeriodicalIF":4.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10793704/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139404861","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Comparative immunogenicity and neutralizing antibody responses post heterologous vaccination with CoronaVac (Sinovac) and Vaxzevria (AstraZeneca) in HIV-infected patients with varying CD4+ T lymphocyte counts. 在不同 CD4+ T 淋巴细胞数量的 HIV 感染者中接种异源疫苗 CoronaVac(希诺威)和 Vaxzevria(阿斯利康)后的免疫原性和中和抗体反应比较。
IF 4.1 4区 医学
Human Vaccines & Immunotherapeutics Pub Date : 2024-12-31 Epub Date: 2024-01-31 DOI: 10.1080/21645515.2024.2309734
Sorawit Chittrakarn, Pisud Siripaitoon, Sarunyou Chusri, Siripen Kanchanasuwan, Boonsri Charoenmak, Thanaporn Hortiwakul, Phaiwon Kantikit, Narongdet Kositpantawong
{"title":"Comparative immunogenicity and neutralizing antibody responses post heterologous vaccination with CoronaVac (Sinovac) and Vaxzevria (AstraZeneca) in HIV-infected patients with varying CD4+ T lymphocyte counts.","authors":"Sorawit Chittrakarn, Pisud Siripaitoon, Sarunyou Chusri, Siripen Kanchanasuwan, Boonsri Charoenmak, Thanaporn Hortiwakul, Phaiwon Kantikit, Narongdet Kositpantawong","doi":"10.1080/21645515.2024.2309734","DOIUrl":"10.1080/21645515.2024.2309734","url":null,"abstract":"<p><p>The immune response to heterologous coronavirus disease (COVID-19) vaccination in people living with HIV (PLWH) is still unclear. Herein, our prospective cohort study aimed to compare the immune response of heterologous vaccination with CoronaVac (Sinovac) and Vaxzevria (AstraZeneca) between PLWH having CD4 counts ≤ 200 cells/µL (low CD4+) and > 200 cells/µL (high CD4+). Anti-receptor-binding domain (RBD) immunoglobulin G (IgG) levels and the percentage inhibition of neutralizing antibodies (nAbs) were analyzed at 2 and 12 weeks after immunization. Participants in the low and high CD4+ groups had mean CD4+ counts of 139 and 575 cell/µL, respectively. Two and 12 weeks after immunization, in the low CD4 group, the median anti-RBD-IgG levels were 159 IU/mL and 143 IU/mL, respectively, whereas the nAb level was 71% and decreased to 47.2%, respectively. Contrarily, the median anti-RBD-IgG levels in the high CD4+ group were 273 IU/mL and 294 IU/mL, respectively, whereas the nAb levels were 89.3% and relatively stable at 81.6%. However, although immune responses between the two study groups were not significantly different, a decline in nAb levels was observed at 12 weeks in the low CD4+ group. Therefore, a COVID-19 booster vaccine dose is suggested for immunoprotection.</p>","PeriodicalId":49067,"journal":{"name":"Human Vaccines & Immunotherapeutics","volume":"20 1","pages":"2309734"},"PeriodicalIF":4.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10841008/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139651994","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Ex vivo observation of Pythium insidiosum-antigen treated neutrophils on three Pythium insidiosum strains isolated from vascular pythiosis patients. 体内观察经脓疱疮抗原处理的中性粒细胞对从血管脓疱病患者体内分离出的三种脓疱疮菌株的影响。
IF 4.1 4区 医学
Human Vaccines & Immunotherapeutics Pub Date : 2024-12-31 Epub Date: 2024-02-05 DOI: 10.1080/21645515.2024.2304372
Sadeep Medhasi, Apichaya Sriwarom, Nitipong Permpalung, Pattama Torvorapanit, Rongpong Plongla, Ariya Chindamporn, Navaporn Worasilchai
{"title":"<i>Ex vivo</i> observation of <i>Pythium insidiosum</i>-antigen treated neutrophils on three <i>Pythium insidiosum</i> strains isolated from vascular pythiosis patients.","authors":"Sadeep Medhasi, Apichaya Sriwarom, Nitipong Permpalung, Pattama Torvorapanit, Rongpong Plongla, Ariya Chindamporn, Navaporn Worasilchai","doi":"10.1080/21645515.2024.2304372","DOIUrl":"10.1080/21645515.2024.2304372","url":null,"abstract":"<p><p>The mechanisms of <i>Pythium insidiosum</i>-antigen (PIA) immunotherapy activating a patient's immune system are unknown. We evaluated the interleukin-8 (IL-8) serum levels during <i>P. insidiosum</i> infection and after vaccination with PIA in vascular pythiosis cases. Furthermore, we studied the anti-<i>P. insidiosum</i> activity of neutrophils stimulated with various concentrations of PIA <i>ex vivo</i> in 3 strains of <i>P. insidiosum</i> isolated from vascular pythiosis patients. IL-8 serum levels were evaluated using the ELISA technique. We assessed the effect of PIA-stimulated neutrophils on the viability of zoospores using MTT assay, visualized neutrophil extracellular trap (NET) formation via microscopy, and measured the levels of double-stranded DNA (dsDNA) using PicoGreen dsDNA quantitation assay in 3 strains of <i>P. insidiosum</i> isolated from vascular pythiosis patients. Serum levels of IL-8 gradually lowered from the early to the end phases of vaccination with PIA among the surviving group of vascular pythiosis cases. Neutrophils stimulated with 0.01 µg/ml PIA reduced zoospore viability significantly compared to PIA-unstimulated neutrophils for strain 1 and strain 3 (<i>p</i> < .05). Neutrophils stimulated with 0.01, 0.1, 1, and 10 µg/ml PIA exhibited significantly lower zoospore viability than PIA-unstimulated neutrophils for strain 2 (<i>p</i> < .05). IL-8 can be used as a biomarker for monitoring vascular pythiosis cases treated with the PIA vaccine. Also, anti-<i>P. insidiosum</i> activity of PIA-stimulated neutrophils was probably due to the disruption of cellular activity in zoospores rather than the mechanisms based on the formation of NETs.</p>","PeriodicalId":49067,"journal":{"name":"Human Vaccines & Immunotherapeutics","volume":"20 1","pages":"2304372"},"PeriodicalIF":4.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10854268/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139693331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Formulation development of a stable influenza recombinant neuraminidase vaccine candidate. 稳定型流感重组神经氨酸酶候选疫苗的配方开发。
IF 4.1 4区 医学
Human Vaccines & Immunotherapeutics Pub Date : 2024-12-31 Epub Date: 2024-03-18 DOI: 10.1080/21645515.2024.2304393
Bing Li, Irina V Ustyugova, Lisa Szymkowicz, Shaolong Zhu, Marin Ming, Karen Y Y Fung, Guadalupe Cortés, D Andrew James, Michael Hrynyk, Nausheen Rahman, Roger H Brookes, Salvador F Ausar
{"title":"Formulation development of a stable influenza recombinant neuraminidase vaccine candidate.","authors":"Bing Li, Irina V Ustyugova, Lisa Szymkowicz, Shaolong Zhu, Marin Ming, Karen Y Y Fung, Guadalupe Cortés, D Andrew James, Michael Hrynyk, Nausheen Rahman, Roger H Brookes, Salvador F Ausar","doi":"10.1080/21645515.2024.2304393","DOIUrl":"10.1080/21645515.2024.2304393","url":null,"abstract":"<p><p>Current influenza vaccines could be augmented by including recombinant neuraminidase (rNA) protein antigen to broaden protective immunity and improve efficacy. Toward this goal, we investigated formulation conditions to optimize rNA physicochemical stability. When rNA in sodium phosphate saline buffer (NaPBS) was frozen and thawed (F/T), the tetrameric structure transitioned from a \"closed\" to an \"open\" conformation, negatively impacting functional activity. Hydrogen deuterium exchange experiments identified differences in anchorage binding sites at the base of the open tetramer, offering a structural mechanistic explanation for the change in conformation and decreased functional activity. Change to the open configuration was triggered by the combined stresses of acidic pH and F/T. The desired closed conformation was preserved in a potassium phosphate buffer (KP), minimizing pH drop upon freezing and including 10% sucrose to control F/T stress. Stability was further evaluated in thermal stress studies where changes in conformation were readily detected by ELISA and size exclusion chromatography (SEC). Both tests were suitable indicators of stability and antigenicity and considered potential critical quality attributes (pCQAs). To understand longer-term stability, the pCQA profiles from thermally stressed rNA at 6 months were modeled to predict stability of at least 24-months at 5°C storage. In summary, a desired rNA closed tetramer was maintained by formulation selection and monitoring of pCQAs to produce a stable rNA vaccine candidate. The study highlights the importance of understanding and controlling vaccine protein structural and functional integrity.</p>","PeriodicalId":49067,"journal":{"name":"Human Vaccines & Immunotherapeutics","volume":"20 1","pages":"2304393"},"PeriodicalIF":4.1,"publicationDate":"2024-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10950269/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140144439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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