"SINT1A" - Supplementation With B. Infantis for Mitigation of Type 1 Diabetes Autoimmunity - A Study of the Global Platform for the Prevention of Autoimmune Diabetes ("GPPAD")
试验速览
- 阶段
- 不适用
- 状态
- 进行中（未招募）
- 入组人数
- 1,149
- 试验地点
- 8
- 主要终点
- Persistent confirmed multiple beta-cell autoantibodies
研究概览
简要总结
Investigator initiated, randomised, placebo-controlled, double-blind, multi-centre primary intervention study to assess whether daily administration of B. infantis EVC001 from age 7 days to 6 weeks (+14 days) until age 12 months (+ 14 days) to children with elevated genetic risk for type 1 diabetes reduces the cumulative incidence of beta-cell autoantibodies in childhood.
详细描述
The GPPAD-04 SINT1A study will evaluate whether early, regular supplementation with a daily dose of a probiotic can reduce the risk of developing beta-cell autoimmunity in children identified by GPPAD-02 as being genetically predisposed to developing type 1 diabetes. Children will be enrolled at age 7 days to 6 weeks (+14 days) and the study product (B. infantis EVC001 or Placebo) will be administered orally once per day from enrollment until age 12 months (+14 days).
The hypotheses is that administration of B. infantis may have a positive influence on the intestinal flora and thus have a regulating effect on the immune system. The study is designed to investigate whether pathogenic immune reactions as in type 1 diabetes but also in other diseases, such as celiac disease, can be reduced and if the disease can be prevented.
Children will be followed until age 3.5 - 6.5 years (2.5 - 5.5 years after end of treatment).
Throughout the study data will be collected by regular study visits, phone calls with the families and electronic questionaires.
Blood samples will be collected to investigate glucose, HbA1c, beta-cell autoantibodies, transglutaminase antibodies, vaccine responses, genetic susceptibility and mechanistic markers. Stool samples will be collected for further assessments such as colonization,microbiome, pH and calprotectin.
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
- Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
入排标准
- 年龄范围
- 7 Days 至 6 Weeks（Child）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Infants between the ages of 7 days and 6 weeks (+14 days in case of illness or COVID-19 related issues or unexpected delay in result reporting) at the time of randomisation.
- •A 10% or higher genetic risk to develop multiple beta-cell autoantibodies by age 6 years:
- •For infants without a first-degree family history of type 1 diabetes, high genetic risk is defined as a DR3/DR4-DQ8 or DR4-DQ8/DR4-DQ8 genotype and a genetic risk score that is in the upper 25th centile (>14.4) or a DR3/DR4-DQ8 genotype with a GRS between the upper 50th (14.0) and 25th centile and a GG genotype at the rs3763305 SNP. These represent around 1% of all newborns.
- •For infants with a first-degree family history of type 1 diabetes, high genetic risk is defined as having HLA DR4 and DQ8, and none of the following protective alleles: DRB1*1501, DQB1*0503, DRB1*
- •These represent around 30% of infants with a first-degree family history of T1D.
- •Written informed consent signed by the custodial parent(s).-
排除标准
- •Any medical condition, concomitant disease or treatment that may interfere with the assessments or may jeopardize the participant's safe participation in the study, as judged by the Investigators.
- •Preterm delivery < 36 weeks of gestation.
- •Proven immunodeficiency.
- •Any condition that could be associated with poor compliance.
- •Diagnosis of diabetes at the time of recruitment
研究组 & 干预措施
B. infantis
Activated B. infantis EVC001; Bifidobacterium longum subsp. infantis; 8 x 109 colony forming units (CFU) per day
干预措施: B. infantis (Dietary Supplement)
Placebo
Lactose identical in appearance and taste to the active supplement
干预措施: Placebo (Dietary Supplement)
结局指标
主要结局
Persistent confirmed multiple beta-cell autoantibodies
时间窗: Through study completion, up to 6.5 years
Persistent confirmed multiple beta-cell autoantibodies is defined as confirmed IAA, confirmed GADA, confirmed IA-2A, or confirmed ZnT8A in two consecutive samples, AND a confirmed second antibody from these four antibodies in one sample. The primary outcome is the elapsed time from the random treatment assignment to the first confirmed autoantibody positive sample used in defining the persistent confirmed multiple beta-cell autoantibody positive status. Diabetes in the absence of multiple beta-cell autoantibodies is also considered as a primary outcome endpoint, and in this case, the date of diagnosis is the time of the end point.
次要结局
- Transglutaminase antibodies(Through study completion, up to 6.5 years)
- Persistent confirmed beta-cell autoantibodies(Through study completion, up to 6.5 years)
- Diabetes(Through study completion, up to 6.5 years)
- Respiratory infection rate(1 year)
- Measurement of Safety parameters(from Baseline until 30 days after end of supplementation)
研究者
Anette-Gabriele Ziegler
Director - Institute of Diabetes Research
Helmholtz Zentrum München