Rett 综合征和相关疾病的生物样本库
Rett 综合征和相关疾病协议的生物样本库
研究概览
详细说明
目前,缺乏对 RTT、MECP2 Dup 或 Rett 相关疾病的有效治疗。 在过去的十一年中,研究人员在 RTT 方面取得了实质性进展,因此这项研究代表了对 MECP2 基因和相关疾病的突变或重复的关注,包括表型重叠的疾病。 通过 Rett 综合征自然历史临床协议 (NHS),对 RTT 的理解取得了显着进步,基础科学领域的相应进步也取得了同样的成功。 因此,临床和基础科学的进步导致了临床试验和其他转化研究的建立,这些研究有望在未来进行更多的临床试验。 然而,在这个过程中,研究人员开始意识到在构思最初提案时未知的其他 MECP2 和 RTT 相关疾病,并且进一步对 RTT 个体的大量临床变异性印象深刻,这些变异性无法用突变差异来解释独自的。 事实上,具有相同突变的个体之间的变异性导致研究人员寻找其他解释。 在首次申请时(2002 年),即基因 MECP2 被鉴定为与 RTT 的分子联系仅三年后,研究人员并不知道与 MECP2 突变或相关但相当不同的 MECP2 Dup。 每种疾病的特点是与 MECP2 基因的改变相关或与与 RTT 个体中观察到的表型非常相似的表型相关的显着神经发育特征。 此外,由于 CDKL5 和 FOXG1 的突变,与 RTT 的表型重叠也未被探索。 研究人员在这项新研究中建议,在理解经典和变异 RTT 方面取得的实质性进展的基础上,添加这些相关疾病、MECP2 Dup 和 Rett 相关疾病,包括 CDKL5、FOXG1 和没有 MECP2 突变的个体RTT。 结合通过自然历史部分进行的纵向临床评估,研究人员将从所有自愿参与者的血液中系统地收集并分离血浆、DNA 和 RNA。 自然历史研究的所有参与者都将被要求在初次访问时提供样本,而样本将在一部分参与者身上重复收集,以寻找随时间变化的变化。 为了确定区分受影响和未受影响个体的因素,以及有可能表征家庭遗传变化的遗传力和潜在后果,将从未受影响的家庭成员收集样本。 此外,由于独特的临床特征而选择的一部分个体将收集皮肤活检和/或毛囊以建立细胞系。 调查人员将要求所有提供样本的个人同意未来可能进行的全基因组测序,以便能够潜在地评估这些疾病的遗传修饰因子。
这些材料将存储在中央存储库(格林伍德遗传学实验室)中。 这些样本的主要目的是作为未来分析的耐用材料,但是,将对所有样本执行一组定义的分析。 对于在 Rett 综合征队列中收集的样本,研究人员将进行 X 染色体失活研究并评估脑源性神经营养因子 (BDNF) 中的常见多态性,并确定这些已知因素对疾病严重程度的贡献。 对于 MECP2 Dup 队列,研究人员将表征血浆中的炎症标志物并将其与临床特征相关联。 同样对于 MECP2 Dup 队列研究人员将进行详细的基因组断点和基因内容分析,并将其与疾病严重程度相关联。 将对具有 FOXG1 重复的人进行基因组断点和基因内容的类似分析。 最后,在一项初步研究中,研究人员将对所有疾病患者进行代谢分析,并评估与疾病严重程度相关的代谢特征,以及这些疾病之间常见或独特的代谢特征。 这项工作将为未来的分析提供持久的资源,扩展对基因型/表型相关性的理解,确定导致疾病严重程度的其他生物学因素,并为疾病状态和严重程度的生物标志物的开发提供框架。
研究类型
注册 (实际的)
联系人和位置
学习地点
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Alabama
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Birmingham、Alabama、美国、35294
- University of Alabama at Birmingham
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California
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Oakland、California、美国、94709
- UCSF Benioff Children's Hospital Oakland
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San Diego、California、美国、92123
- University of California San Diego
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Colorado
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Denver、Colorado、美国、80045-2571
- University of Colorado Denver
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Illinois
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Chicago、Illinois、美国、60612
- Rush University Medical Center
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Massachusetts
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Boston、Massachusetts、美国、02115
- Children's Hospital Boston
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Minnesota
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Minneapolis、Minnesota、美国、55101
- Gillette Children's Specialty Healthcare
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Missouri
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Saint Louis、Missouri、美国、63110-1093
- Washington University School of Medicine and St. Louis Children's Hospital
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Pennsylvania
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Philadelphia、Pennsylvania、美国、19104-4318
- Children's Hospital of Philadelphia
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South Carolina
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Greenwood、South Carolina、美国、29646
- Greenwood Genetic Center
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Tennessee
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Nashville、Tennessee、美国、37212
- Vanderbilt University
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Texas
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Houston、Texas、美国、77030
- Baylor College of Medicine
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参与标准
资格标准
适合学习的年龄
- 孩子
- 成人
- 年长者
接受健康志愿者
有资格学习的性别
取样方法
研究人群
所有年龄段的女性和男性都必须对 MECP2、FOXG1 和 CDKL5 基因突变进行完整检测,并且必须满足以下要求:
这 3 个基因之一的序列突变、重复或缺失基因呈阳性。
或 符合 Rett 综合征的共识标准(典型或非典型)
描述
纳入标准:
- 所有性别和所有年龄段的个体,患有 RTT、MECP2 Dup 和 RTT 相关疾病,包括 CDKL5 和 FOXG1 基因突变或缺失的个体,或 RTT(非典型或典型)突变阴性的个体。 此外,那些符合所述疾病特定标准的人的未受影响的家庭成员也有资格。
排除标准:
- 不符合上述条件的个人将被排除在外。
学习计划
研究是如何设计的?
设计细节
- 观测模型:队列
- 时间观点:预期
队列和干预
团体/队列 |
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雷特综合征
这是一个针对 MECP2 突变或符合经典(典型)或变异(非典型)Rett 综合征诊断标准的个人的生物样本库项目,目的是确定其他遗传因素,例如 X 染色体失活或遗传背景,这些因素可以解释在这些人,包括那些具有相同 MECP2 突变的人。
预计不会有任何干预措施。
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MECP2 复制障碍
这是一个针对具有 MECP2 重复的个体的生物样本库项目,以了解重复大小的差异以及重复片段中其他基因的潜在影响。
预计不会有任何干预措施。
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Rett 相关疾病:CDKL5、FOXG1
这是一个针对 MECP2、CDKL5 和 FOXG1 突变个体的生物样本库项目,旨在了解突变在这些个体中的相互作用以及由此产生的表型表达;例如,具有 MECP2 突变但不符合 Rett 综合征诊断标准的个体,或具有 CDKL5 或 FOXG1 突变但可能符合或不符合非典型 Rett 综合征诊断标准的个体。
预计不会有任何干预措施。
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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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Rett 综合征 (RTT) 中的 X 染色体失活
大体时间:5年
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表征 RTT 中的 X 染色体失活并与临床严重程度相关联。
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5年
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RTT 中的 Bdnf 多态性
大体时间:5年
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表征 RTT 中的 Bdnf 多态性并与临床严重程度相关联。
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5年
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MECP2 重复综合征中的炎症标志物
大体时间:5年
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评估 MECP2 重复综合征中的炎症标志物并与疾病严重程度相关联。
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5年
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Rett 综合征 (RTT)、MECP2 重复综合征、FOXG1、CDKL5 和不产生 RTT 的 MECP2 突变的血液生物样本库
大体时间:5年
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将从具有 RTT、MECP2 重复、FOXG1、CDKL5 和 MECP2 突变且无 RTT 的参与者收集和储存血液,以分析结果 1-3 和次要结果 5 中指出的与疾病严重程度相关的因素。
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5年
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次要结果测量
结果测量 |
措施说明 |
大体时间 |
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MECP2 和 FOXG1 重复的断点和基因含量
大体时间:5年
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表征 MECP2 和 FOXG1 重复的断点和基因含量并与疾病严重程度相关
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5年
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合作者和调查者
合作者
调查人员
- 学习椅:Jeffrey L Neul, MD, PhD、UCSD
出版物和有用的链接
一般刊物
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