A Double-blind, Randomized, Prospective, Placebo-controlled Trial to Assess the Immunogenicity, Safety, and Tolerability of a Coronavirus Vaccine in Healthy Volunteers Aged 18 to 60 Years

A two-stage trial will involve healthy volunteers. The first stage is open trial, and the second stage is a double-blind trial with randomization of volunteers into three groups. At stage I of the trial, the maximum number of screened healthy volunteers will be 30 of which 20 men aged 18 to over 60 years. At stage II of the trial, the maximum number of screened healthy volunteers will be 150, of which 135 men and women aged 18 to over 60 years eligible according to the inclusion and exclusion criteria are planned to be included and randomized to collect data that will be used for the subsequent safety and immunogenicity assessment. The enrollment of volunteers at stage II will be competitive.

开始日期2021-07-19

申办/合作机构

St. Petersburg Research Institute of Vaccines and Sera

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项与 Subunit recombinant vaccine(St. Petersburg Research Institute of Vaccines and Sera) 相关的文献（医药）

2024-12-31·Human Vaccines & Immunotherapeutics

Immunogenicity of intranasal vaccine based on SARS-CoV-2 spike protein during primary and booster immunizations in mice

Article

作者: Xie, Ying ; Bao, Chunting ; Wang, Jiahao ; Li, Shuyan ; Nie, Jiaojiao ; Li, Changgui ; Yang, Huijie ; Quan, Yaru

Mucosal immunity plays a crucial role in combating and controlling the spread of highly mutated severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Recombinant subunit vaccines have shown safety and efficacy in clinical trials, but further investigation is necessary to evaluate their feasibility as mucosal vaccines. This study developed a SARS-CoV-2 mucosal vaccine using spike (S) proteins from a prototype strain and the omicron variant, along with a cationic chitosan adjuvant, and systematically evaluated its immunogenicity after both primary and booster immunization in mice. Primary immunization through intraperitoneal and intranasal administration of the S protein elicited cross-reactive antibodies against prototype strains, as well as delta and omicron variants, with particularly strong effects observed after mucosal vaccination. In the context of booster immunization following primary immunization with inactivated vaccines, the omicron-based S protein mucosal vaccine resulted in a broader and more robust neutralizing antibody response in both serum and respiratory mucosa compared to the prototype vaccine, enhancing protection against different variants. These findings indicate that mucosal vaccination with the S protein has the potential to trigger a broader and stronger antibody response during primary and booster immunization, making it a promising strategy against respiratory pathogens.

2024-04-01·Experimental Parasitology

Evaluation of the immunoprotective effect of the recombinant Eimeria intestinalis rhoptry protein 25 and rhoptry protein 30 on New Zealand rabbits

Article

作者: Xiong, Changming ; Jiang, Qing ; Zhu, Yuhua ; He, Wei ; Hao, Ge ; Xu, Liwen ; Yang, Guangyou ; Xiao, Jie

BACKGROUNDRabbit coccidiosis is a parasitism caused by either one or multiple co-infections of Eimeria species. Among them, Eimeria intestinalis is the primary pathogen responsible for diarrhea, growth retardation, and potential mortality in rabbits. Concerns regarding drug resistance and drug residues have led to the development of recombinant subunit vaccines targeting Eimeria species as a promising preventive measure. The aim of this study was to assess the immunoprotective efficacy of recombinant subunit vaccines comprising EiROP25 and EiROP30 (rhoptry proteins (ROPs)) against E. intestinalis infection in rabbits.METHODSCloning, prokaryotic expression, and protein purification were performed to obtain EiROP25 and EiROP30. Five groups of fifty 35-day-old Eimeria-free rabbits were created (unchallenged control group, challenged control group, vector protein control group, rEiROP25 group, and rEiROP30 group), with 10 rabbits in each group. Rabbits in the rEiROP25 and rEiROP30 groups were immunized with the recombinant proteins (100 μg per rabbit) for primary and booster immunization (100 μg per rabbit) at a two-week intervals, and challenged with 7 × 10⁴ oocysts per rabbit after an additional two-week interval. Two weeks after the challenge, the rabbits were euthanized for analysis. Weekly collections of rabbit sera were made to measure changes in specific IgG and cytokine level. Clinical symptoms and pathological changes after challenge were observed and recorded. At the conclusion of the animal experiment, lesion scores, the relative weight increase ratio, the oocyst reduction rate, and the anticoccidial index were computed.RESULTSRabbits immunized with rEiROP25 and rEiROP30 exhibited relative weight gain ratios of 56.57% and 72.36%, respectively. Oocysts decreased by 78.14% and 84.06% for the rEiROP25 and rEiROP30 groups, respectively. The anticoccidial indexes were 140 and 155. Furthermore, there was a noticeable drop in intestinal lesions. After the primary immunization with rEiROP25 and rEiROP30, a week later, there was a notable rise in specific IgG levels, which remained elevated for two weeks following challenge (P < 0.05). Interleukin (IL)-2 levels increased markedly in the rEiROP25 group, whereas IL-2, interferon gamma (IFN-γ), and IL-4 levels increased substantially in the rEiROP30 group (P < 0.05).CONCLUSIONImmunization of rabbits indicated that both rEiROP25 and rEiROP30 are capable of inducing an increase in specific antibody levels. rEiROP25 triggered a Th1-type immune protection response, while rEiROP30 elicited a Th1/Th2 mixed response. EiROP25 and EiROP30 can generate a moderate level of immune protection, with better efficacy observed for EiROP30. This study provides valuable insights for the promotion of recombinant subunit vaccines targeting rabbit E. intestinalis infection.

2024-03-01·Cell Biochemistry and Function

Nucleic acid‐based vaccine for ovarian cancer cells; bench to bedside

Review

作者: Kaur, Irwanjot ; Mustafa, Yasser Fakri ; Hjazi, Ahmed ; Redhee, Ahmed Huseen ; Alwaily, Enas R. ; Al‐Hawary, Sulieman Ibraheem Shelash ; Jasim, Saade Abdalkareem ; Kumar, Abhinav ; Al‐Ani, Ahmed Muzahem ; Oghenemaro, Enwa Felix

AbstractOvarian cancer continues to be a difficult medical issue that affects millions of individuals worldwide. Important platforms for cancer immunotherapy include checkpoint inhibitors, chimeric antigen receptor T cells, bispecific antibodies, cancer vaccines, and other cell‐based treatments. To avoid numerous infectious illnesses, conventional vaccinations based on synthetic peptides, recombinant subunit vaccines, and live attenuated and inactivated pathogens are frequently utilized. Vaccine manufacturing processes, however, are not entirely safe and carry a significant danger of contaminating living microorganisms. As a result, the creation of substitute vaccinations is required for both viral and noninfectious illnesses, including cancer. Recently, there has been testing of nucleic acid vaccines, or NAVs, as a cancer therapeutic. Tumor antigens (TAs) are genetically encoded by DNA and mRNA vaccines, which the host uses to trigger immune responses against ovarian cancer cells that exhibit the TAs. Despite being straightforward, safe, and easy to produce, NAVs are not currently thought to be an ideal replacement for peptide vaccines. Some obstacles to this strategy include selecting the appropriate therapeutic agents (TAs), inadequate immunogenicity, and the immunosuppressive characteristic of ovarian cancer. We focus on strategies that have been employed to increase NAVs' effectiveness in the fight against ovarian cancer in this review.

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新型冠状病毒感染	俄罗斯	St. Petersburg Research Institute of Vaccines and Sera	2022-03-18

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适应症	最高研发状态	国家/地区	公司	日期
COVID-19 呼吸道感染	临床3期	俄罗斯	St. Petersburg Research Institute of Vaccines and Sera	2022-10-24
免疫缺陷综合征	临床2期	俄罗斯	St. Petersburg Research Institute of Vaccines and Sera	2021-07-19