Safety and Immunogenicity Evaluation of the Vaccine Candidate Sm14 in Combination With the Adjuvant Glucopyranosyl Lipid A (GLA-SE) in Adults Living in Endemic Regions for S. Mansoni and S. Haematobium in Senegal. A Comparative, Randomized, Open-label Trial
试验速览
- 阶段
- 2 期
- 状态
- 已完成
- 发起方
- 入组人数
- 30
- 试验地点
- 1
- 主要终点
- Number of Participants with Adverse Events as a Measure of Safety and Tolerability.
研究概览
简要总结
The clinical trial phase 2a is designed to assess the safety of the active ingredient (protein + adjuvant) and secondarily its immunogenicity in healthy male adults from 18 to 49 years of age with a history of infection with intestinal and urinary schistosomiasis, living in the Valley of the Senegal River, a highly endemic area for schistosomiasis. Two arms in the study will test different doses of GLA-SE adjuvant (2.5 and 5 μg). This phase IIA in adults is considered to be a preliminary step in safety before starting trials in children in endemic areas to S. mansoni or S. haematobium, target population of the vaccine.
详细描述
A phase 2a trial, self-contained, open-label, randomized, dose-escalation study in two parallel arms receiving three (3) injections at D0, D28, D56; both groups receiving 50 μg Sm14 vaccine candidate solution, either combined with 2.5µg GLA-SE for the first group and 5µg for the second one in adults living in a S. mansoni and S. haematobium endemic area.
Sm14: recombinant protein produced in yeast following Good Manufacturing Practices (GMP) conditions, presented in vials containing 0.55 ml solution Sm14, 0.4 ml solution is diluted with 0.4 ml of GLA (Synthetic Glucopyranosyl lipid A) for intramuscular administration.
Medical examinations are performed at D0 (before injection, 1 hr and 4 hr after), and a safety evaluation at 24 hrs and 48 hrs, after each injection.
Blood analysis: Liver function tests - renal function tests - blood counts, at W-1 before inclusion, and then 7 days after each injections and at W13 and W21 during the follow-up.
Blood samples for immune response analysis at time of each injection, and then W12 and W20.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Prevention
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 49 Years（Adult）
- 性别
- Male
- 接受健康志愿者
- 是
入选标准
- •Adults, male, 18 to 49 years old (inclusive) at the time of inclusion.
- •Living in one of selected villages in Saint-Louis Region (Senegal).
- •Free of obvious/severe health problems except schistosomiasis, as established by clinical examination and blood analysis, i.e. hematological exams, liver and renal function tests.
- •Written informed consent to participate obtained
- •Treated with 40mg/kg Praziquantel (PZQ) before inclusion (W-5 to W-4 before the first injection) in case of infection with S. mansoni and S. haematobium
- •Residence in the area during the period of the study.
排除标准
- •Adult who does not respond to one of the inclusion criteria
- •Current or previous chronic administration (defined as more than 14 days) of immunosuppressive drugs or other immuno-modifying drugs.
- •Known hypersensitivity to any component in the Sm14 vaccine or history of allergic disease.
- •Knowledge of non-infectious chronic disease
- •Acute disease at time of enrollment.
- •Other conditions which in opinion of the PI may potentially represent a danger for the patient to be enrolled.
- •Non residence in the study area or intent to move during the study period
研究组 & 干预措施
Group 1
Adults with an infectious history of S. haematobium and S. mansoni and pretreated with 1 dose of Praziquantel (3 weeks prior to the first vaccine injection) receiving three (3) intramuscular injections of 50 μg Sm14 with 2.5 μg GLA-SE solution at D0, W4, W8 (D=day; W=week). Three-month follow-up (W12, W20).
干预措施: Sm14 (Biological)
Group 1
Adults with an infectious history of S. haematobium and S. mansoni and pretreated with 1 dose of Praziquantel (3 weeks prior to the first vaccine injection) receiving three (3) intramuscular injections of 50 μg Sm14 with 2.5 μg GLA-SE solution at D0, W4, W8 (D=day; W=week). Three-month follow-up (W12, W20).
干预措施: GLA-SE solution (Drug)
Group 2
Adults with an infectious history of S. haematobium and S. mansoni and pretreated with 1 dose of Praziquantel (3 weeks prior to the first vaccine injection) receiving three (3) intramuscular injections of 50 μg Sm14 with 5.0 μg GLA-SE solution at D0, W4, W8 (D=day; W=week). Three-month follow-up (W12, W20).
干预措施: Sm14 (Biological)
Group 2
Adults with an infectious history of S. haematobium and S. mansoni and pretreated with 1 dose of Praziquantel (3 weeks prior to the first vaccine injection) receiving three (3) intramuscular injections of 50 μg Sm14 with 5.0 μg GLA-SE solution at D0, W4, W8 (D=day; W=week). Three-month follow-up (W12, W20).
干预措施: GLA-SE solution (Drug)
结局指标
主要结局
Number of Participants with Adverse Events as a Measure of Safety and Tolerability.
时间窗: within 7 days of the administration of the first dose
. Local signs and symptoms included Pain, Swelling and Inflammation at the injection site, Heaviness or pain upon passive or active movement of the injected limb, Complete physical examination including an examination of general appearance, body weight and forehead temperature, head, eyes, ears, nose and throat, neck, skin, cardiovascular and respiratory system, abdominal system, nervous system, lymphatic area, blood pressure, pulse and respiratory rates. General signs and symptoms including fever, headache, nausea, vomiting, myalgia, arthralgia, irritability/fussiness and drowsiness, loss of appetite and sleep disturbances. Laboratory tests (blood count, liver and kidney biological functions).
Number of Participants with Adverse Events as a Measure of Safety and Tolerability
时间窗: D120 : four months after the first injection
Local signs and symptoms included pain or tenderness, swelling, induration and erythema at the site of injection. Complete physical examination including an examination of general appearance, body weight and forehead temperature, head, eyes, ears, nose and throat, neck, skin, cardiovascular and respiratory system, abdominal system, nervous system, lymphatic area, blood pressure, pulse and respiratory rates. General signs and symptoms including fever, headache, nausea, vomiting, myalgia, arthralgia, irritability/fussiness and drowsiness, loss of appetite and sleep disturbances. Laboratory tests (blood count, liver and kidney biological functions).
次要结局
- Qualitative and quantitative assessment of the Immunogenicity(120 days after the first administration)
研究者
MIRIAM TENDLER
MD, PhD
Oswaldo Cruz Foundation