Composition and Collection Feasibility of Gut Microbiota in Children With and Without Obesity
2019年7月31日 更新者：University of Illinois College of Medicine at Peoria
Adults with obesity have an imbalance of bacteria in their intestines which may contribute to weight gain and diseases related to obesity.
Restoring the balance of these bacteria (the "microbiota") could help reduce weight and related diseases.
However, little is known about this imbalance in children with obesity.
This research study will map out the compositions of the gut microbiota of children and compare them with those of children who have healthy weights and different degrees of obesity.
This project will also measure the amounts of fatty acids in the stools which are an indication of how efficiently the intestines absorb calories from food.
If an imbalance is detected in children with obesity, then this information can help researchers test ways to restore the gut microbiota with hopes of reducing weight and some of its related health problems.
研究概览
地位
未知
条件
研究类型
观察性的
注册 (预期的)
150
联系人和位置
本节提供了进行研究的人员的详细联系信息，以及有关进行该研究的地点的信息。
学习地点
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Illinois
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Peoria、Illinois、美国、61637
- University of Illinois College of Medicine at Peoria
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参与标准
研究人员寻找符合特定描述的人，称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。
资格标准
适合学习的年龄
5年 至 12年 (孩子)
接受健康志愿者
不适用
有资格学习的性别
全部
取样方法
非概率样本
研究人群
150 participants will be recruited from 4 primary care sites (2 urban and two rural) and a tertiary pediatric weight management clinic (PWMC) located in Central Illinois over an 18 month period.
Enrollment will equally represent urban and rural lean participant living environments.
描述
Inclusion Criteria:
1) patients aged 5-12 years
Exclusion Criteria:
- patient who have received either oral or parenteral antibiotics in the last 3 months
- patients who have a diagnosed immunodeficiency
- patients who are on medications that modulate the immune system including systemic prednisone and biologics
- patients who have a gastrointestinal condition which is known to alter the gut flora such as inflammatory bowel disease, chronic diarrhea, celiac disease and eosinophilic gastroenteritis diseases
- patients who have taken proton pump inhibitors in the last 3 months
- patients who have taken probiotics in the last 6 months.
学习计划
本节提供研究计划的详细信息，包括研究的设计方式和研究的衡量标准。
研究是如何设计的？
设计细节
队列和干预
团体/队列 |
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Healthy Weight
Participants with BMI < 95th percentile
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Obese
Participants with BMI > or = 95th percentile
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研究衡量的是什么？
主要结果指标
结果测量 |
措施说明 |
大体时间 |
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Microbiota Composition
大体时间：Over 2 years
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High-throughput sequencing targeting the 16S rRNA gene will be used to detect and identify bacteria in fecal samples.
DNA extraction and library preparation will be performed at the University of Illinois College of Medicine at Peoria, and libraries will be subjected to 16S rDNA sequencing (approximately 10k reads will be obtained per sample) on a MiSeq instrument.
Using 10k reads per sample provides stable patterns for human stool microbiota.
The 16S data will provide information about the presence and abundance of bacteria, and will be analyzed with Qiime, an open source bioinformatics package.
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Over 2 years
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Short Chain Fatty Acid Content
大体时间：Over 2 years
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Gas Chromatography will be used to measure SCFA amounts, specifically acetate, butyrate, proprionate.
Preserved aliquot samples will be analyzed on Agilent GC/MS system (6890GC/5973 MS with 7683B autosampler) with gas chromatography performed on a ZB-WAX (30 m×0.32 mm I.D., 0.25um film thickness) capillary column (Phenomenex, Torrance, CA).
The inlet and MSD interface temperatures will both be 250°C, with the ion source temperature adjusted to 230°C.
The helium carrier gas will be kept at a constant flow rate of 3.2 ml/min.
The temperature program is: initial 2-min isothermal heating at 80°C, followed by an oven temperature increase of 20°C/min to 110°C, then 10°C/min to 130°C, and then 35°C/min to 255°C.
Mass spectra will again be recorded in the m/z 50-300 scanning range.
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Over 2 years
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Specimen Quality
大体时间：Over 2 years
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Technical factors, which may affect microbial compositions (such as times of specimen collection, home freezer storage removal, shipping, and arrival) will be recorded as independent variables.
To estimate and minimize the effect of technical variables, principal component analysis will be used and the study will follow the International Human Microbiome Standards
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Over 2 years
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合作者和调查者
在这里您可以找到参与这项研究的人员和组织。
研究记录日期
这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查，以确保它们在发布到公共网站之前符合特定的质量控制标准。
研究主要日期
学习开始 (实际的)
2017年3月7日
初级完成 (实际的)
2018年12月31日
研究完成 (预期的)
2019年12月31日
研究注册日期
首次提交
2017年5月9日
首先提交符合 QC 标准的
2017年5月9日
首次发布 (实际的)
2017年5月11日
研究记录更新
最后更新发布 (实际的)
2019年8月1日
上次提交的符合 QC 标准的更新
2019年7月31日
最后验证
2019年7月1日
更多信息
此信息直接从 clinicaltrials.gov 网站检索，没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求，请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改，我们的网站上也会自动更新.