PXE 患者的肠道微生物群和维生素 K 水平(IMPROVE 研究) (IMPROVE)
研究概览
详细说明
维生素 K 缺乏会导致病理性钙化,这是弹性假黄瘤 (PXE) 临床表现的基础,这是一种常染色体隐性遗传病。 很大一部分维生素 K,即 K2 形式(甲萘醌),是由肠道微生物群产生的。 在健康志愿者中,主要的甲萘醌生产者、大肠杆菌和拟杆菌属的粪便水平分别约为 5 和 9 log10 CFU/g 干重。 然而,缺乏关于 PXE 患者肠道微生物群的数据。 我们项目的目的是证明肠道微生物群组成、各种形式维生素 K 的血浆水平和 PXE 患者临床表现的严重程度之间的潜在关联。
这项研究将作为围绕生物收集“PXE 患者的临床和生物探索”的研究进行,该生物收集保存在昂热大学医院生物资源中心(生物收集 n° DC 20116-14-67,授权转移 n° 2016-27 -99). 粪便样本、血浆样本和临床数据将从诊断为 PXE 的患者中收集,这些患者将于 2019-2020 年在昂热大学医院转诊中心(法国)接受监测。 PXE 的临床严重程度将使用修改后的 Phenodex 评分进行评估。 肠道微生物群将使用宏基因组测序进行分析。 将使用 HPLC 评估血浆维生素 K 种类和甲萘醌的粪便排泄。 将使用免疫测定评估血浆 dp-ucMGP(维生素 K 状态的循环生物标志物)和血清 PIVKA-II(维生素 K 缺失诱导的蛋白质-II)。 结果将与现有 Biofortis 数据库中年龄和性别匹配的健康对照进行比较。
研究类型
注册 (预期的)
阶段
- 不适用
联系人和位置
学习联系方式
- 姓名:Ludovic Martin, MD, PhD
- 电话号码:+332.41.35.55.76
- 邮箱:LuMartin@chu-angers.fr
学习地点
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Pays De La Loire
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Saint-Herblain、Pays De La Loire、法国、44800
- 主动,不招人
- Biofortis Mérieux NutriSciences
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Pays De Loire
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Angers、Pays De Loire、法国、49933
- 招聘中
- Department of Dermatology, University Hospital of Angers
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接触:
- Ludovic Martin, MD, PhD
- 电话号码:+332.41.35.55.76
- 邮箱:LuMartin@chu-angers.fr
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Maastricht、荷兰、6229
- 主动,不招人
- Department of Biochemistry, University Maastricht
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参与标准
资格标准
适合学习的年龄
接受健康志愿者
有资格学习的性别
描述
纳入标准:
- 具有表型和遗传学 (ABCC6) 证实的 PXE 的患者
- 18岁以上
- 获得昂热大学医院(法国)PXE 生物收集的书面同意
排除标准:
- 18岁以下患者
- 不愿参与研究或无法签署生物采集同意书的患者
学习计划
研究是如何设计的?
设计细节
- 主要用途:基础科学
- 分配:不适用
- 介入模型:单组作业
- 屏蔽:无(打开标签)
武器和干预
参与者组/臂 |
干预/治疗 |
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其他:PXE 队列 2019-2020
2019 年至 2020 年在转诊中心监测的 PXE 患者队列:粪便和血液样本
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用于肠道微生物群分析的粪便样本;用于评估各种形式的维生素 K 的血液和粪便样本
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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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用于肠道微生物群分析的粪便样本
大体时间:15分钟
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肠道菌群组成和物种的相对丰度(通过宏基因组测序)
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15分钟
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用于评估各种形式的维生素 K 的粪便样本
大体时间:15分钟
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粪便维生素 K 种类
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15分钟
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用于评估各种形式的维生素 K 的血液样本
大体时间:15分钟
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血浆维生素 K 种类
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15分钟
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用于评估 dp-ucMGP 的血液样本
大体时间:15分钟
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血浆 dp-ucMGP
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15分钟
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用于评估 PIVKA-II 的血液样本
大体时间:15分钟
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血清PIVKA-II
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15分钟
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眼睛和心血管 PXE 表现的严重程度以及 PXE 皮肤变化的程度
大体时间:15分钟
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修改后的 Phenodex 评分:
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15分钟
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合作者和调查者
调查人员
- 首席研究员:Ludovic MARTIN, MD, PhD、Department of Dermatology, University Hospital of Angers
出版物和有用的链接
一般刊物
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研究记录日期
研究主要日期
学习开始 (实际的)
初级完成 (预期的)
研究完成 (预期的)
研究注册日期
首次提交
首先提交符合 QC 标准的
首次发布 (实际的)
研究记录更新
最后更新发布 (实际的)
上次提交的符合 QC 标准的更新
最后验证
更多信息
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