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丙酸对 CKD 患儿调节性 T 细胞功能的影响 (Pro-Kids)

2026年11月3日 更新者：Johannes Benjamin Holle、Charite University, Berlin, Germany

丙酸对慢性肾脏病患儿调节性T细胞功能的影响

Pro-Kids is a multi-center, double-blind, randomized and placebo-controlled intervention study in children with chronic kidney disease. The investigators address the effect of a dietary food supplementation of propionic acid on the immune system and the function of the intestinal barrier in CKD patients treated with hemodialysis.

研究概览

地位

招聘中

条件

干预/治疗

详细说明

Chronic inflammation is a major risk factor of cardiovascular disease progression in CKD, irrespective of confounding comorbidities. Based on current knowledge, microbially-derived metabolites such as short chain fatty acids (SCFA) play an important role in the regulation of chronic inflammatory processes in CKD patients. Children with CKD are known to have reduced serum levels of the SCFA propionic acid (PA), as a consequence of both gut microbial dysbiosis and reduced fiber intake. In animal and human studies the impact of PA on function and abundance of regulatory T cells (Treg) has been demonstrated. Consequently, the investigators aim to normalize the PA serum levels by oral PA food supplementation in hemodialysis patients in order to mitigate chronic inflammation.

研究类型

介入性

注册 (估计的)

16

阶段

  • 不适用

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。

学习联系方式

研究联系人备份

学习地点

  • 德国
    • State of Berlin
      • Berlin、State of Berlin、德国、13353
        • 招聘中
        • Department of Pediatric Gastroenterology, Nephrology and Metabolic Diseases, Charité-Universitätsmedizin Berlin
        • 接触：
          • Johannes Holle, MD
        • 接触：
          • Dominik Müller, MD

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

12年 至 20年 (孩子、成人)

接受健康志愿者

不

有资格学习的性别

全部

描述

Inclusion Criteria:

  • Body weight: > 30kg
  • CKD G5 treated with hemodialysis
  • Continuous hemodialysis treatment for > 3 months
  • Clinical stable condition
  • Manifestation of CKD within childhood (<18 years)

Exclusion Criteria:

  • Disease or dysfunctions, which disqualifies the patient
  • Incapacity of contract or any other circumstances, which prohibit the patient or his legal guardians from understanding setup, meaning and entity of the study
  • Acute infections
  • Immunosuppressive therapy within the last 12 weeks before the start of the study
  • Pre-/pro- or postbiotic or antibiotic therapy within the last 4 weeks before the start of the study
  • Planned or unplanned hospitalization within in last 4 weeks before the start of the study or during study
  • Malignant diseases
  • Pregnancy
  • chronic gastrointestinal or hepatic diseases (for example chronic inflammatory bowel disease
  • alcohol- or drug abuse
  • parallel participation on other interventional trials

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

  • 主要用途：基础科学
  • 分配：随机化
  • 介入模型：并行分配
  • 屏蔽：四人间

武器和干预

参与者组/臂
干预/治疗
实验性的：PA Intervention

The group which receives the PA as a dietary food supplement. A single capsule contains 500mg of sodiumpropionate, which is taken twice daily for 28 days.
膳食补充剂：Sodium propionate

The patients will be randomized to PA or placebo intervention (2:1 randomization).

After the intervention of 28 days, we conduct an open-label study phase, where all patients are offered a dietary supplement of PA for overall 12 weeks (8 additional weeks for the intervention group and 12 weeks for the placebo group).

By doing so we are giving every patient the opportunity to take PA and benefit from the possible positive impact on immunsystem and intestinal barrier function.
安慰剂比较：Placebo Intervention

The control-group receives a placebo instead of propionate. The placebo contains maltodextrin and the same amount of sodium chloride as compared to the PA intervention. The placebo is taken twice per day for 28 days.
其他：Placebo

The patients will be randomized to PA or placebo intervention (2:1 randomization).

After the intervention of 28 days, we conduct an open-label study phase, where all patients are offered a dietary supplement of PA for overall 12 weeks (8 additional weeks for the intervention group and 12 weeks for the placebo group).

By doing so we are giving every patient the opportunity to take PA and benefit from the possible positive impact on immunsystem and intestinal barrier function.

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
Change in count of regulatory T-cells from baseline to week 4
大体时间：Baseline visit (week 0) in comparison to week 4

Analysis of Treg counts in whole blood (absolute quantification) and peripheral blood mononuclear cells (PBMC; relative quantification) by flow cytometry.
Baseline visit (week 0) in comparison to week 4

次要结果测量

结果测量
措施说明
大体时间
Propionic acid serum levels and targeted metabolomics
大体时间：Baseline visit (week 0); Week 2; Week 4; Week 12

Analysis of PA serum levels and other microbially-derived metabolites by GC-MS and LC-MS
Baseline visit (week 0); Week 2; Week 4; Week 12
Immune cell phenotyping of peripheral blood mononuclear cells (PBMC)
大体时间：Baseline visit (week 0); Week 2; Week 4; Week 12

Patients PBMC will be thawed and immune cells we be analyzed using multicolor flow cytometry and mass cytometry. By using a broad range of different antibodies combined in several panels the investigators will analyse distinct T cell subtypes including markers of activation, but also other immune cells (including B cells, dendritic cells, monocytes, natural killer cells). Data will reported in relation to parent populations (e.g. T heller cells in % of T cells).
Baseline visit (week 0); Week 2; Week 4; Week 12
T regulatory cell (Treg) suppression assay
大体时间：Baseline visit (week 0); Week 4

The suppressive capacity of patients Treg will be analyzed by co-cultivation with conventional, stimulated T cells (Tconv) in different proportions (Treg:Tconv). The proliferation of Tconv will be reported.
Baseline visit (week 0); Week 4
Single cell RNA sequencing of immune cells
大体时间：Baseline visit (week 0); Week 4

Analysis of the transcriptome of immune cells using cellular indexing of transcriptomes and epitopes (CITEseq)
Baseline visit (week 0); Week 4
Intestinal barrier function
大体时间：Baseline visit (week 0); Week 2; Week 4; Week 12

Analysis of biomarkers for intestinal barrier function, such as sCD14, zonulin-1 and LPS
Baseline visit (week 0); Week 2; Week 4; Week 12
Taxonomy of the fecal microbiome
大体时间：Baseline visit (week 0); Week 4

The taxonomy of the fecal microbiome will be anayzed using 16S RNA amplicon sequencing.
Baseline visit (week 0); Week 4
Cardiovascular Phenotyping
大体时间：Baseline visit (week 0); Week 2; Week 4; Week 12

Analysis of heart rate over time.
Baseline visit (week 0); Week 2; Week 4; Week 12
Cardiovascular Phenotyping
大体时间：Baseline visit (week 0); Week 2; Week 4; Week 12

Analysis of blood pressure over time.
Baseline visit (week 0); Week 2; Week 4; Week 12
Cholesterol levels
大体时间：Baseline visit (week 0); Week 2; Week 4; Week 12

Cholesterol levels will be assessed using standard clinical lab values.
Baseline visit (week 0); Week 2; Week 4; Week 12

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。

赞助

Charite University, Berlin, Germany

合作者

University Hospital, Essen
University Hospital Heidelberg
Universitätsklinikum Hamburg-Eppendorf
University Hospital of Cologne

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)

2024年1月15日

初级完成 (实际的)

2026年7月8日

研究完成 (估计的)

2027年3月1日

研究注册日期

首次提交

2023年4月25日

首先提交符合 QC 标准的

2023年5月4日

首次发布 (实际的)

2023年5月15日

研究记录更新

最后更新发布 (实际的)

2026年11月4日

上次提交的符合 QC 标准的更新

2026年11月3日

最后验证

2026年10月1日

更多信息

与本研究相关的术语

其他相关的 MeSH 术语

其他研究编号

  • EA2/195/22

药物和器械信息、研究文件

研究美国 FDA 监管的药品

不

研究美国 FDA 监管的设备产品

不

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.

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