Effects of Aging on Primary and Secondary Vaccine Responses in a 15-Year Longitudinal Cohort
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 入组人数
- 54
- 试验地点
- 1
- 主要终点
- hemagglutination inhibition assay (HAI) titers
研究概览
简要总结
The purpose of this study is to use an existing, unique clinical cohort: the longitudinal cohort of younger (21-40 years) and elderly (>65 years) subjects whose yearly influenza vaccine responses have been studied extensively since 2007, to gain molecular and cellular mechanistic insights into the impaired vaccine responses in the elderly.
详细描述
This is a phase I mechanistic study of sixty 21-40 and >65 year old adult volunteers who previously participated in vaccine studies with our program. All participation is by invitation only.
The volunteers will be enrolled into two groups. Group A: Up to 30 healthy adult volunteers age 21-40 who will be given seasonal quadrivalent inactivated influenza vaccine (IIV4) prior to flu season for each of 5 years. They will also be given an inactivated Hepatitis A vaccine in the spring of years 1 and 2. Each volunteer will complete a total of 4 visits for each immunization: Day 0 (pre-immunization), Day 6-8, Day 12-15, and Day 26-30 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
A subset of this group will be randomized to receive either a Typhoid Vi Polysaccharide Vaccine or Typhoid Vaccine Live Oral Ty21a vaccine in year 3. Each volunteer will complete a total of 4 visits for this immunization: Day 0 (pre-immunization), Day 6-8 post completion of injection or final oral dose, Day 12-15 and Day 26-30 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
Group B: Up to 30 healthy adult volunteers age 65 plus who will be randomized and given seasonal trivalent high dose inactivated influenza vaccine (IIV3) or trivalent adjuvanted trivalent inactivated influenza vaccine (Fluad) prior to flu season for each of 5 years. They will also be given an inactivated Hepatitis A vaccine in the spring of years 1 and 2 and aTyphoid Vi Polysaccharide Vaccine in year 3. Each volunteer will complete a total of 4 visits for each immunization: Day 0 (pre-immunization), Day 6-8, Day 12-15, and Day 26-30 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
A subset of subjects (with a target of 10 younger and 10 older subjects depending on health), will undergo bone marrow aspirates one or two years after typhoid vaccination.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 主要目的
- Basic Science
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Provision of signed and dated informed consent form
- •Stated willingness to comply with all study procedures and availability for the duration of the study.
- •Prior participant in either the Ellison cohort or another Stanford vaccine study with archived samples.
- •Male or female, aged 18-40 years or 65 years and older.
- •In good general health as evidenced by medical history.
排除标准
- •Prior off-study vaccination with the current season influenza vaccine for influenza vaccinations.
- •Allergy to egg or egg products
- •Allergy to vaccine components, including thimerosal
- •Active systemic or serious concurrent illness, including febrile illness on the day of vaccination
- •Receipt of blood or blood products within the past 6 months of any study vaccination or planned receipt of blood products prior to completion of Day 28 post-immunization visit.
- •Receipt of inactivated vaccine 14 days prior to study vaccination or planned vaccination prior to Day 28 after study vaccination.
- •Receipt of live, attenuated vaccine within 60 days of study vaccination or planned vaccination prior to Day 28 after study vaccination.
- •Donation of the equivalent of a unit of blood within 6 weeks prior to enrollment or planned blood donation prior to Day 28 after study vaccination.
- •Use of investigational agents within 30 days prior to enrollment or planned use of investigational agents prior to completion of all study visits.
- •Need for allergy immunizations (that cannot be postponed) between Days 0 and 28 post-immunization.
- •Pregnant or lactating woman for all but influenza vaccine. A woman who is pregnant or breastfeeding may be evaluated by the Protocol Director to determine if influenza vaccination would affect volunteer safety and may be included at the discretion of the investigator. Blood sample collection will be adjusted as necessary for volunteer safety (e.g. blood collection volume for a pregnant woman would follow the minimal risk guidelines of 50 ml in an 8 week period and collection may not occur more frequently than 2 times per week).
- •Any condition, which, in the opinion of the investigator, might interfere with volunteer safety, study objectives or the ability of the participant to understand or comply with the study protocol.
研究组 & 干预措施
Group A IIV4
Group A: Up to 30 healthy volunteers 18-40 years old, will be given seasonal quadrivalent inactivated influenza vaccine (IIV4) Fluzone® Quadrivalent vaccine. Each volunteer will complete a total of 4 visits: Day 0 (pre-immunization), Day 6-8, Day 12-16, and Day 28+ 7 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
干预措施: Fluzone® quadrivalent (Biological)
Group B High Dose IIV3
Group B: Up to 15 healthy volunteers 65 plus years old, will be given seasonal high dose trivalent inactivated influenza vaccine (Fluzone High Dose) Fluzone® high dose vaccine. Each volunteer will complete a total of 4 visits: Day 0 (pre-immunization), Day 6-8, Day 12-16, and Day 28+ 7 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
干预措施: Fluzone High Dose (Biological)
Group B Fluad
Group B: Up to 15 healthy volunteers 65 plus years old, will be given seasonal adjuvanted trivalent inactivated influenza vaccine Fluad®. Each volunteer will complete a total of 4 visits: Day 0 (pre-immunization), Day 6-8, Day 12-16, and Day 28+ 7 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
干预措施: Fluad (Biological)
Group A Hepatitis A (HepA)
Group A: Up to 30 healthy volunteers 18-40 years old, will be given inactivated Hepatitis A vaccine Vaqta® in year 1 of the study and a booster 12 months post primary Vaqta vaccination. Each volunteer will complete a total of 4 visits per vaccination: Day 0 (pre-immunization), Day 6-8, Day 12-16, and Day 28+ 7 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
干预措施: Vaqta (Biological)
Group B Hepatitis A
Group B: Up to 30 healthy volunteers 65 plus years old, will be given inactivated Hepatitis A vaccine Vaqta® in year 1 of the study and a booster 12 months post primary Vaqta vaccination. Each volunteer will complete a total of 4 visits per vaccination: Day 0 (pre-immunization), Day 6-8, Day 12-16, and Day 28+ 7 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
干预措施: Vaqta (Biological)
Group A Typhoid VI
Group A: Up to 15 healthy volunteers 18-40 years old, will be randomized to either Typhoid Vi Polysaccharide Vaccine (Typhoid VI), Typhim Vi®, or Typhoid Vaccine Live Oral Ty21a, Vivotif®. This arm represents those randomized to Typhoid VI. Each volunteer will complete a total of 4 visits: Day 0 (pre-immunization), Day 6-8, Day 12-16, and Day 28+ 7 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
干预措施: Typhim Vi (Biological)
Group A Oral Typhoid
Group A: Up to 15 healthy volunteers 18-40 years old, will be randomized to either Typhoid Vi Polysaccharide Vaccine, Typhim Vi®, or Typhoid Vaccine Live Oral Ty21a, Vivotif® (Oral Typhoid). This arm represents those randomized to Oral Typhoid. Each volunteer will complete a total of 4 visits: Day 0 (pre-immunization), Day 6-8 (from date of last oral dose), Day 12-16, and Day 28+ 7 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
干预措施: Vivotif (Biological)
Group B Typhoid VI
Group B: Up to 30 healthy volunteers 65 plud years old, will be given Typhoid Vi Polysaccharide Vaccine (Typhoid VI), Typhim Vi® vaccine. Each volunteer will complete a total of 4 visits: Day 0 (pre-immunization), Day 6-8, Day 12-16, and Day 28+ 7 (post-immunization). All visits will consist of drawing blood for study assays and monitoring for serious adverse events (SAEs).
干预措施: Typhim Vi (Biological)
结局指标
主要结局
hemagglutination inhibition assay (HAI) titers
时间窗: Day 0 to Day 28
HAI titers measured at Days 0 and 28 for influenza.
次要结局
- related AEs occurring during the 28 days post vaccination(Day 0 to Day 28 post-each immunization)
研究者
Philip Grant
Assistant Professor of Medicine (Infectious Diseases)
Stanford University