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Assembling the Most Antigenic Peptides of COVID-19 Immunogenic Proteins Along with a Molecular Adjuvant to Develop a Novel Polyepitope Vaccine: a Bioinformatics Investigation 组装新冠肺炎免疫原性蛋白质的最抗原肽和分子佐剂开发新型多表位疫苗:生物信息学研究
Pub Date : 2021-06-01 DOI: 10.52547/vacres.8.1.36
N. Shams, N. Nazifi, A. Forouharmehr, A. Jaydari, Ehsan Rashidian
The had -0.210 GRAVY and 36.39 instability indices which make it theoretically stable. The designed construct was predicted to be soluble and non-allergenic. The approximate half-life of the proposed structure was computed 30 hours in mammalian reticulocytes and more than 10 hours in Escherichia coli . In its tertiary structure, 93% of the residues were in the core region and had a score of 52.73 for 3D verification and -5.55 for Z-score. Protein-protein docking of HBHA and TLR4/MD2 receptor was successful with the lowest energy of -1310.6 kcal/mol. Conclusion: The bioinformatics evaluations indicate that the designed structure is stable and immunogenic for development of a protein-based subunit vaccine against COVID-19.
它具有-0.210的重力和36.39的不稳定性指数,使它在理论上稳定。所设计的构建体被预测为可溶的和非致敏的。所提出的结构在哺乳动物网织红细胞中的半衰期约为30小时,在大肠杆菌中的半衰期超过10小时。在其三级结构中,93%的残基位于核心区,3D验证得分为52.73,Z得分为-5.55。HBHA和TLR4/MD2受体的蛋白质-蛋白质对接成功,最低能量为-130.6 kcal/mol。结论:生物信息学评价表明,所设计的结构稳定,具有免疫原性,可用于开发基于蛋白的新冠肺炎亚单位疫苗。
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引用次数: 0
Comparative Study of AEFI of Hepatitis B Vaccine between Iran Ministry of Health CDC and VAERS Data during 2015 to 2017 2015 - 2017年伊朗卫生部CDC与VAERS数据乙型肝炎疫苗AEFI比较研究
Pub Date : 2021-06-01 DOI: 10.52547/vacres.8.1.52
Hamidreza Hozouri, Alireza Shamsian, M. Aghasadeghi, D. Doroud
of rHBV, with those in The The most common adverse after administration of rHBV, manufactured by Pasteur of Iran was injection site reactions and no life threatening adverse event was observed. Conclusion: Despite reports by VAERS indicating that HBV can cause adverse events and even death in the United States, no such adverse effects were observed in rHBV in
伊朗巴斯德公司生产的rHBV给药后最常见的不良反应是注射部位反应,未观察到危及生命的不良事件。结论:尽管VAERS的报告表明HBV在美国会引起不良事件甚至死亡,但在
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引用次数: 0
Quantitative Approaches for Causality Assessment of Adverse Events Following Immunisation for COVID-19 Vaccines COVID-19疫苗免疫后不良事件因果关系评估的定量方法
Pub Date : 2021-06-01 DOI: 10.52547/vacres.8.1.73
S. Teo
Vaccine safety surveillance is important to identify and manage adverse events following immunisation (AEFI) and avoid vaccine hesitancy. Currently, COVID-19 vaccines are administered to large numbers of people to try and curb the pandemic. In this paper, quantitative methods for causality assessment of AEFI are described. Qualitative methods for causality assessment involve an expert panel reviewing each AEFI report to determine whether the AEFI can be attributed to the vaccine. Each AEFI is determined to be classified as consistent, inconsistent, indeterminate or unclassifiable in terms of causality. Quantitative approaches can strengthen causality assessment outcomes. However, the potential for bias and errors should be considered for each safety signal identified. Vaccine and population specific factors may affect AEFI incidence, with a need to obtain background rates to frame safety signals identified into the local context. Several case scenarios from the vaccine safety surveillance in Brunei are used to illustrate the practical application of quantitative approaches for AEFI causality assessment (including comparison of AESI incidence to background rates and disproportionality analysis), which complement the traditional qualitative methods.
疫苗安全性监测对于识别和管理免疫后的不良事件(AEFI)以及避免疫苗犹豫非常重要。目前,新冠肺炎疫苗被大量接种,以试图遏制疫情。本文介绍了AEFI因果关系评估的定量方法。因果关系评估的定性方法包括由专家小组审查每份AEFI报告,以确定AEFI是否可归因于疫苗。根据因果关系,每个AEFI被确定为一致、不一致、不确定或不可分类。定量方法可以加强因果关系评估结果。然而,对于每个确定的安全信号,应考虑潜在的偏差和误差。疫苗和人群特异性因素可能会影响AEFI的发病率,需要获得背景发病率,以将确定的安全信号纳入当地环境。使用文莱疫苗安全性监测的几个案例场景来说明AEFI因果关系评估的定量方法的实际应用(包括AESI发病率与背景发病率的比较和不均衡性分析),这是对传统定性方法的补充。
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引用次数: 0
Recombinant vaccines against Newcastle Disease: current trends and research agenda 抗新城疫重组疫苗:当前趋势和研究议程
Pub Date : 2021-06-01 DOI: 10.52547/vacres.8.1.92
A. Shahriari, M. Habibi
its causative the basics of producing recombinant vaccines and production platforms are protein or an 8-amino acid epitope of HN protein. Protein extensions including F, HN and HN2 (double HN replication)
重组疫苗的致病基础和生产平台是蛋白质或HN蛋白的8个氨基酸表位。蛋白质延伸包括F, HN和HN2(双HN复制)
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引用次数: 0
Potent Therapeutic Efficacy of a Novel HPV16E7-HBcAg-Hsp65 Fusion Protein Vaccine 新型HPV16E7-HBcAg-Hsp65融合蛋白疫苗的有效治疗效果
Pub Date : 2021-06-01 DOI: 10.52547/vacres.8.1.60
Chao Zhang, Chenliang Zhou, Xiaoliang Wang, Xinxing Ma, Meijun Diao, Haitao Liu, Dan Xu, Jian Wei, Yuanxiang Jiang, Menghua Zhang, Lingyun Zhou, Jiang Fan, Ge Liu
Results: In TC-1 showed potent dose dependent therapeutic efficacy against and improved rates in the and high doses (30 μg). The three fusion components of VR 111 were all necessary to induce the best anti-tumor activity, CTL response and T cell proliferation. The tumor growth inhibition and a higher mouse survival rate were among the beneficial effects of cisplatin-based combination treatment. Moreover, the anti-tumor potency of VR 111 vaccine was proved to be significantly associated with E7 specific CD8 + T cell immune response and the adoptive lymphocyte transfer therapy also showed tumor growth inhibition. Conclusion: The results confirmed VR 111 as a potent therapeutic HPV vaccine candidate with superior anti-tumor efficacy in a murine model of HPV-induced cancer which its potentials could be considered for combination therapies against cervical cancer.
结果:TC-1在高剂量(30 μg)下均表现出较强的剂量依赖性治疗效果和提高率。vr111的三种融合成分都是诱导最佳抗肿瘤活性、CTL反应和T细胞增殖所必需的。肿瘤生长抑制和更高的小鼠存活率是以顺铂为基础的联合治疗的有益效果。此外,vr111疫苗的抗肿瘤效力与E7特异性CD8 + T细胞免疫应答显著相关,过继性淋巴细胞转移治疗也具有肿瘤生长抑制作用。结论:vr111是一种有效的HPV治疗性候选疫苗,在人乳头瘤病毒诱导的小鼠肿瘤模型中具有良好的抗肿瘤作用,可以考虑其用于宫颈癌的联合治疗。
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引用次数: 0
Back to the Basics: The Good Old BCG for COVID-19? 回到基础:老BCG治疗新冠肺炎?
Pub Date : 2021-06-01 DOI: 10.52547/vacres.8.1.9
N. Boutrid, H. Rahmoune, H. Boutrid
The outbreak of SARS-CoV-2 from Wuhan, China in late 2019 and the subsequent worldwide pandemic in 2020 [1] are pushing scientists to look for urgent and efficient ways of protecting patients and managing positive cases, and a real “race for a cure” is running forward, but also backward! In fact, several epidemiological data in humans suggest that live vaccines (e.g., Bacillus Calmette–Guérin (BCG), measles, oral polio and vaccinia) may enhance nonspecific resistance to other non-targeted infections [2]. Several epidemiological studies have notably shown that BCG vaccine is capable of providing protection against numerous infections, unrelated to tuberculosis in an innate-immune dependent manner [3]. Such non-specific effects implicate both adaptive and innate immune mechanisms, and recent evidence suggests that epigenetic reprogramming of monocytes termed „trained immunity‟ is a key mechanism which acts as a boosting effect on the innate immune memory [3-6]. Observations suggest that the innate immune system exhibits memory-like features, remembering the first exposure to the vaccine and responds with an emphasized reaction to future infections [3-4]. Particularly, Natural Killer (NK) cells may contribute to these indirect beneficial effects as BCG immunization enhances the cytokine production by human NK cells [7]. Different clinical trials (e.g., BRACE trial in Australia, NCT04327206) are currently underway to investigate the potential benefits of BCG immunization to confer such protection [8]. These trials, due to several paradigms, are essentially restricted to health care providers as an initial step [9]. Moreover, an interesting monocentric trial in the United Arab Emirates was recently published with encouraging results. It compared two groups, comprised of BCG booster-vaccinated healthcare professionals versus unvaccinated professionals. The rate of SARS-CoV-2 infection was compared between the groups, more than 3 months later. The results indicated that the infection rate in the unvaccinated cohort was 8.6% versus 0% in the booster vaccinated cohort (Fisher's exact test P-value = 0.004), highlighting the potential efficiency of this booster BCG vaccine [10]. Finally, regarding the safety of this potential BCG revaccination, a 2021 systematic review encompassing 24 studies has concluded this strategy had no serious adverse events in immuno-competent patients and that such revaccination carries only minimal risks of mild local and systemic reactions [11]. The near future will tell us whether this century-aged BCG vaccine could be a cure of youth for COVID-19 pandemic.
2019年末,中国武汉爆发了严重急性呼吸系统综合征冠状病毒2型,随后在2020年爆发了全球大流行[1],这促使科学家们寻找紧急有效的方法来保护患者和管理阳性病例,一场真正的“治愈竞赛”正在向前推进,但也在倒退!事实上,一些人类流行病学数据表明,活疫苗(如卡介苗、麻疹、口服脊髓灰质炎和牛痘)可能会增强对其他非靶向感染的非特异性耐药性[2]。几项流行病学研究显著表明,BCG疫苗能够以先天免疫依赖的方式提供对多种与结核病无关的感染的保护[3]。这种非特异性效应涉及适应性和先天免疫机制,最近的证据表明,单核细胞的表观遗传学重编程被称为“训练免疫”是一种关键机制,对先天免疫记忆起到增强作用[3-6]。观察结果表明,先天免疫系统表现出记忆样特征,记得第一次接触疫苗,并对未来的感染做出强调反应[3-4]。特别是,自然杀伤(NK)细胞可能有助于这些间接的有益作用,因为BCG免疫增强了人类NK细胞的细胞因子产生[7]。目前正在进行不同的临床试验(例如,澳大利亚的BRACE试验,NCT04327206),以调查BCG免疫提供这种保护的潜在益处[8]。由于有几种模式,这些试验基本上仅限于医疗保健提供者作为初始步骤[9]。此外,最近在阿拉伯联合酋长国发表了一项有趣的单中心试验,取得了令人鼓舞的结果。它比较了两组人群,包括接种了BCG加强针的医护人员和未接种疫苗的医护人员。3个多月后,对两组之间的严重急性呼吸系统综合征冠状病毒2型感染率进行了比较。结果表明,未接种疫苗的队列的感染率为8.6%,而接种加强针的队列为0%(Fisher精确检验P值=0.004),突出了这种加强BCG疫苗的潜在有效性[10]。最后,关于这种潜在的BCG再接种的安全性,2021年一项包括24项研究的系统综述得出结论,这种策略在免疫能力强的患者中没有严重的不良事件,并且这种再接种只会带来轻微的局部和全身反应的最小风险[11]。不久的将来将告诉我们,这种百年BCG疫苗是否可以治愈青年新冠肺炎大流行。
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引用次数: 0
Two Months Follow-Up of 139 Unvaccinated COVID-19 Patients Based on Clinical and Imaging Data 139名未接种新冠肺炎疫苗患者的两个月随访——基于临床和影像学数据
Pub Date : 2021-06-01 DOI: 10.52547/vacres.8.1.1
M. Zangeneh, Yasamin Khosravani-Nezhad, Mohsen Alijani, Behnam Farhoodi, Hamid-Reza Massumi-Naini, S. Siadat, M. Mesgarian
Introduction: To understand the effects of COVID-19 vaccines it would be essential to have knowledge about the effects of the disease during the time that vaccines were unavailable. Hence, we tracked the clinical outcomes of Iranian COVID-19 patients during Feb 19th till May 1st 2020 by a longitudinal follow-up study of patients discharged from a university hospital in Iran.
简介:为了了解新冠肺炎疫苗的效果,在无法获得疫苗期间了解该疾病的影响至关重要。因此,我们通过对伊朗一所大学医院出院患者的纵向随访研究,追踪了2020年2月19日至5月1日期间伊朗新冠肺炎患者的临床结果。
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引用次数: 0
Analysis and Control of an SEIQR Epidemic Model with Application to Ebola Disease Vaccination SEIQR流行病模型的分析与控制及其在埃博拉疫苗接种中的应用
Pub Date : 2021-06-01 DOI: 10.52547/vacres.8.1.23
Priscilla S. Macansantos, Joseph Tullao
Introduction: A modified Susceptible - Exposed - Infected - Quarantined - Recovered (SEIQR) epidemic model with vaccination is considered to understand the transmission dynamics of Ebola disease. Methods: The impact of vaccination as a control strategy is investigated in two cases: vaccination is a constant function of time and time - dependent vaccination. For the first case, the reproduction number is derived and mathematical analysis reveals that the existence of equilibrium points and the qualitative properties of solutions of the resulting autonomous model are completely determined by . For the second case, we conduct an analysis that is based on optimal control theory to determine optimal application of vaccination control. Results: It is shown that the disease - free equilibrium is locally asymptotically stable if and unstable if . When , the disease - free equilibrium loses its stability and an endemic equilibrium point that is locally asymptotically stable emerges as also verified by demonstrating the existence of forward bifurcation at using the method by Castillo - Chavez and Song. Optimal control analysis shows that that vaccination effort is affected by the cost associated with it. Vaccination control of Ebola can be carried out at maximum rate from the onset of the outbreak if it is not costly. Conclusion: Vaccination is an important intervention strategy in controlling Ebola outbreaks.
本文提出了一种带有疫苗接种的改进的易感-暴露-感染-隔离-恢复(SEIQR)流行病模型,以理解埃博拉病毒的传播动力学。方法:在两种情况下,疫苗接种作为一种控制策略的影响进行了调查:疫苗接种是时间的常数函数和时间依赖的疫苗接种。对于第一种情况,导出了再现数,数学分析表明,平衡点的存在性和所得到的自治模型解的定性性质完全由。对于第二种情况,我们进行了基于最优控制理论的分析,以确定疫苗接种控制的最优应用。结果:证明无病平衡是局部渐近稳定的,是不稳定的。当无病平衡点失去稳定性时,出现一个局部渐近稳定的地方性平衡点,用Castillo - Chavez和Song的方法证明了正向分岔的存在性。最优控制分析表明,疫苗接种工作受到与之相关的成本的影响。在费用不高的情况下,埃博拉疫苗接种控制可以从暴发开始以最大速度进行。结论:预防接种是控制埃博拉疫情的重要干预策略。
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引用次数: 0
Evaluation of the effectiveness of infectious diseases immunoprophylaxis (review of our own research on the model of tick-borne encephalitis) 传染病免疫预防效果评价(蜱传脑炎模型研究述评)
Pub Date : 2021-06-01 DOI: 10.52547/vacres.8.1.11
G. Leonova
Introduction: The tick-borne encephalitis (TBE) virus causes a dangerous neuroinfection in humans can serve as a model for studying the mechanisms of interaction of pathogens with specific antibodies during active and passive immunization. Several commercial vaccines are currently used against TBE. This review analyzes long-term studies aimed at explaining the active and passive efficacy of specific immunoprophylaxis against TBE. Methods: The effectiveness of "Encepur® adult" TBE vaccine has been studied in terms of seroconversion and strength of the immune response by serological reactions, namely IFA, ELISA and neutralizing were reviewed. Results: Rapid elimination of the virus (after 1-2 days) can occur in vaccinated individuals with antibodies in titers of more than 1: 400. Persons with antibodies in titers of 1: 100 and 1: 200, most likely, should be offered mandatory revaccination. It should also take into account the duration of the retention of post-vaccination antibodies. Conclusion: In the year of TBE vaccination, the immune response was at a high level and practically did not differ. A particularly high level of immune protection was observed in persons who were vaccinated by a combination of TBE vaccines of various producers.
引言:蜱传脑炎(TBE)病毒在人类中引起危险的神经感染,可以作为研究主动和被动免疫过程中病原体与特异性抗体相互作用机制的模型。目前有几种商业疫苗用于治疗TBE。这篇综述分析了旨在解释特异性免疫预防对TBE的主动和被动疗效的长期研究。方法:通过IFA、ELISA和中和等血清学反应,从血清转化率和免疫反应强度等方面研究“Encepur®成人”TBE疫苗的有效性。结果:抗体滴度超过1:400的接种者可以快速消除病毒(1-2天后)。抗体滴度为1:100和1:200的人,很可能应该接受强制性的重新接种。它还应考虑疫苗接种后抗体的保留时间。结论:在接种TBE疫苗的那一年,免疫反应处于高水平,实际上没有差异。在通过不同生产商的TBE疫苗组合接种的人中观察到特别高水平的免疫保护。
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引用次数: 0
Determinants of Immunization Status Among Children Between 13-24 Months of Age in Maharashtra, India – A Community Based Cross-Sectional Study 印度马哈拉施特拉邦13-24个月年龄儿童免疫状况的决定因素——一项基于社区的横断面研究
Pub Date : 2020-12-01 DOI: 10.52547/vacres.7.2.28
Sachin A Gawade, Harishchandra D Gore, A. Mane
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引用次数: 1
期刊
Vaccine Research
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