Effect of a Mixture of Probiotics ( Lactobacillus Gasseri PA16/8,Bifidobacterium Longum SP07/3, Bifidobacterium Bifidum MF 20/5) on the Antigen Specific Antibody Response in a Influenza Vaccination Model of Healthy Adult
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 发起方
- 入组人数
- 430
- 试验地点
- 2
- 主要终点
- geographic mean of the increase of antibody titreq against at least one flu strain among the 3 forming the flu vaccine ( H1N1, H3, N and B ) within 3 weeks after flu vaccination
研究概览
简要总结
the aim of the study is to get evidence for an enhancement of immune status in subjects after probiotics mixture consumption ( lactobacillus gasseri PA 16/8, Bifidobacterrium longum SP 07/3, Bifidobacterium bifidum MF 20/5) based on influenza vaccination model - compared to placebo.
详细描述
probiotics are "live microorganisms which when administered in adequate amounts confer a health benefit on the host" . many health effects are associated with probiotics , but various degrees of evidence support the benefits associated to probiotics consumption . Impact on defences and the immune system has been shown with several strains and this may result in improved protection against some infections or improvment of vaccine efficacy .
In its scientific requirments for health claims related to immune function, EFSA indicates that it is generally accepted that higher vaccination responses are beneficial.
研究设计
- 研究类型
- Interventional
- 分配方式
- Randomized
- 干预模型
- Parallel
- 盲法
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 18 Years 至 60 Years（Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •healthy male and female adult
- •between 18 and 60 years old non menopausal female( with effective contraception)
- •female non pregnant- not wishing to be pregnat during the study capable to respect the protocol
- •affialted to the social security system aggreeing to be registered in the national fileof volunteers
排除标准
- •food allergy( component of the experimental product- vaccines)
- •manifestation of allergy
- •vaccinated against flu during the 2 previous winters
- •Food allergy, allergy to one of the component of the experimental products or allergy to one of the component of the flu vaccine;
- •Subject displaying manifestation of allergy or being treated for these;
- •Subject vaccinated against flu during the 2 previous winter (winter 2009-2010 and winter 2010-2011);
- •Subject who had symptoms evocating flu during the previous winter (winter 2010-2011);
- •Subject immunodepressed;
- •Subject with immunomodulatory treatment;
- •Subject who received a treatment resulting in systemic immunossuppression or local immunosuppression at pulmonary level, for at least 1 week during the last 3 months before inclusion (V1);
- •Subject with auto-immune disease;
- •Subject with inflammatory and chronic diseases;
- •Subject with on-going antibiotics treatment at the time of the inclusion;
- •Subject not agree to stop his/her usual probiotics supplementation during the study;
- •Use of medication which could interfere with the study in the investigator's opinion (antibiotics, etc...);
- •Any health condition for which the influenza vaccine is not recommended;
- •Subject having received any other vaccine within one month prior to enrolment or intent to receive any other vaccination during the study period.
结局指标
主要结局
geographic mean of the increase of antibody titreq against at least one flu strain among the 3 forming the flu vaccine ( H1N1, H3, N and B ) within 3 weeks after flu vaccination
时间窗: inclusion-W 4-W 7
次要结局
- seroprotection of the population of volunteers geometric mean of the increase of antibody titres seroprotection in the subset population non sero-protected at V1(inclusion- W4- W7)