脊髓损伤低血压患者对去甲肾上腺素前体屈昔多巴的剂量反应
2025年2月18日 更新者:Jill M. Wecht, Ed.D.、James J. Peters Veterans Affairs Medical Center
本研究的目的是确定药物屈昔多巴 (Northera) 在患有低血压、低血压的受试者中增加血压的功效,低血压被归类为男性血压低于 110/70,女性血压低于 100/70。 第一个目的是确定对屈昔多巴有正常血压反应的脊髓损伤 (SCI) 受试者的比例。 第二个是确定对屈昔多巴表现出高血压反应的 SCI 受试者的比例。 A 男性的正常血压范围为 111-139,女性为 101-139,男性和女性的血压高于 140 均属高血压。
该研究将在纽约曼哈顿的 James J. Peters VA 医疗中心 (JJPVAMC) 和西奈山伊坎医学院 (ISMMS) 进行。
研究概览
详细说明
脊髓损伤 (SCI) 后交感神经心血管自主调节的中断与血浆去甲肾上腺素 (NE) 水平显着降低、低血压和体位性低血压 (OH) 有关,特别是在脊髓损伤较高的个体中。
尽管据报道在患有颈部病变(即四肢瘫痪)的人中低血压的发生率高达 70%,但这些人中的绝大多数仍然没有症状,因此不会引起临床关注或及时干预。
虽然临床医生在管理 SCI 患者的血压 (BP) 方面面临着巨大挑战,但与普遍看法相反,无症状低血压和 OH 不是良性病症。
报告表明,与血压正常的 SCI 患者相比,无症状的 SCI 低血压患者可能存在影响记忆和注意力处理的亚临床认知功能障碍,并且疲劳和抑郁的发生率增加。
必须认识到,迄今为止,还没有 FDA 批准的药物选择被证明对治疗 SCI 人群的低血压和 OH 是安全有效的。
直到 2014 年,盐酸米多君是唯一获得 FDA 批准用于治疗症状性神经源性 OH (NOH) 的药物。
米多君是一种 α 激动剂,是最常用于治疗 SCI 人群症状性低血压的处方药,尽管缺乏令人信服的安全性或有效性证据。
2014 年,屈昔多巴(L-threo-3,4-dihydroxyphenylserine - NORTHERA;Chelsea Therapeutics,Charlotte,NC)根据在自主神经功能障碍情况下收集的数据被 FDA 批准用于治疗症状性 NOH。
屈昔多巴是一种 NE 前体,储存在神经元和非神经元组织中,已被证明可以增加站立血压并减少有症状的 NOH 个体的直立不耐受症状。
我们最近报道了口服 400 毫克屈昔多巴后 SCI 患者坐位血压平均升高的初步证据;然而,该剂量仅对 10 名测试对象中的 5 名有效,并且 BP 效果在 4 小时观察后减弱。
由于其独特的药代动力学特性,屈昔多巴是一种非常有前途的治疗 SCI 患者低血压的药物。
像这样;迫切需要确定屈昔多巴在低血压脊髓损伤患者中的临床价值和安全性。
研究类型
介入性
注册 (实际的)
22
阶段
- 第四阶段
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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New York
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Bronx、New York、美国、10468
- James J. Peters Veteran's Affair Medical Center
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New York、New York、美国、10029
- The Icahn School of Medicine at Mount Sinai
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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
14年 至 85年 (成人、年长者)
接受健康志愿者
是的
描述
纳入标准:
研究 1:
- 男性或女性,年龄在 18 至 89 岁之间,患有创伤性脊髓损伤。
SCI 主题 (n=40):
- 任何程度的伤害;
- 任何美国脊髓损伤协会损伤量表 (AIS) 的 SCI 等级;
- 非呼吸机依赖
- 主要依靠轮椅行动;
- 受伤时间 < 1 年
低血压:
- 对于男性,收缩压低于 110 毫米汞柱和/或舒张压低于 70 毫米汞柱。
- 对于女性,收缩压低于 100 毫米汞柱和/或舒张压低于 70 毫米汞柱。
- 主要语言是英语。
能够提供知情同意
研究 2:
- 男性或女性,年龄在 18 至 89 岁之间,患有创伤性脊髓损伤。
SCI 主题 (n=40):
- 任何程度的伤害;
- SCI 的任何 AIS 等级;
- 非呼吸机依赖
- 主要依赖轮椅行动
- 受伤时间 < 1 年
低血压:
- 对于男性,收缩压低于 110 毫米汞柱和/或舒张压低于 70 毫米汞柱。
- 对于女性,收缩压低于 100 毫米汞柱和/或舒张压低于 70 毫米汞柱。
- 主要语言是英语。
- 能够提供知情同意
- 在研究 1 期间显示对屈昔多巴有反应的正常血压血压。
排除标准:
- 当前疾病或感染
频繁或严重自主神经反射异常的个体:
- 每周超过 3 次症状事件
- 血压≥140/90 毫米汞柱
- 重大不良主观症状报告
- 高血压
- SCI 以外的任何神经系统疾病(阿尔茨海默病、痴呆症、中风、多发性硬化症、帕金森病等)
- 癫痫病史或其他癫痫病史
- 创伤性脑损伤 (TBI) 史
- 肝脏或肾脏疾病
- 膀胱问题,包括尿液阻塞和/或尿流微弱。
- 精神疾病的诊断,例如精神分裂症或双相情感障碍
- 已知的动脉疾病、心力衰竭、房室传导阻滞和心律不齐
- 对屈昔多巴、阿司匹林、聚环氧乙烷、聚乙二醇、羟丙基纤维素、丁基化羟基甲苯、硬脂酸镁、羟丙甲纤维素、黄色氧化铁和红色氧化铁过敏
- 最近 30 天内做过大手术
- 过去 6 个月的非法药物滥用
- 孕
研究调查员和研究人员将审查您的处方药。 如果您目前正在服用药物来治疗以下任何一种情况,请告知调查人员:
d.抑郁症、精神分裂症、注意力缺陷多动障碍 (ADHD) e.止痛药(阿片类药物) f. 感染或疾病(抗生素) g. 勃起功能障碍(伟哥、西力士等) h. 膀胱过度活动症 i.高血压或低血压 j. 偏头痛 k. 疟疾湖哮喘
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:治疗
- 分配:随机化
- 介入模型:并行分配
- 屏蔽:双倍的
武器和干预
参与者组/臂 |
干预/治疗 |
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实验性的:研究 1:Northera 的剂量优化
受试者将以剂量递增、开放标签方式从 200 mg 开始口服屈昔多巴。
在随后的访问中,剂量将向上调整 100 毫克,直到在给药后 60-120 分钟记录的平均收缩压 (SBP) 男性为 111-139 毫米汞柱,女性为 101-139 毫米汞柱,持续升高(连续≥ 30 分钟) ) 在坐位 SBP ≥ 140/100 mmHg 时,达到最大剂量 800 mg 时没有足够的 SBP 反应。
受试者将在少至 1(200 毫克)和多至 7(800 毫克)天的时间内访问测试实验室。
坐姿心血管评估将以 15 分钟的间隔进行监测和记录,持续 4 小时,并且在 4 小时的研究期间每小时进行一次副作用调查问卷。
每次研究访问大约需要 5 个小时。
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研究 1 是 Northera 的一项剂量优化、开放标签试验,剂量范围为 200 毫克至 800 毫克。
其他名称:
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安慰剂比较:研究 2:盲法安慰剂和 Northera
然后,参与者将以双盲方式口服最佳剂量的 Northera(屈昔多巴)或匹配的安慰剂,并保持仰卧位 60 分钟。
受试者将留在轮椅上进行仪器测量,其中包括:1) 心电图,2) 肱动脉血压,3) 手指小动脉血压和 4) 脑血流速度 (CBFv)。
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研究 1 是 Northera 的一项剂量优化、开放标签试验,剂量范围为 200 毫克至 800 毫克。
其他名称:
研究 2 是盲安慰剂对照试验,使用由研究 1 确定的屈昔多巴的个体化最佳剂量。
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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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收缩BP的比例在正常范围内
大体时间:牛氧化杂志后长达240分钟
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确定男性正常的收缩压的比例(%)=(110-120 mmHg);给药后,女性=(101-120 mmHg)。
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牛氧化杂志后长达240分钟
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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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仰卧收缩压
大体时间:在管理Droxidopa或安慰剂后60分钟内
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与SCI的降压参与者相比,要测量给予Droxidopa后仰卧的收缩压
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在管理Droxidopa或安慰剂后60分钟内
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定位收缩压
大体时间:在服用Droxidopa或安慰剂后60-90分钟
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与SCI的低语参与者相比,在龙氧冬虫给药后,对头部倾斜的收缩压反应记录到70度。
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在服用Droxidopa或安慰剂后60-90分钟
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定位脑血流
大体时间:在服用Droxidopa或安慰剂后60-90分钟
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比较给予诺尔瑟拉(droxidopa),比较了安慰剂后脑中动脉的脑血流速度
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在服用Droxidopa或安慰剂后60-90分钟
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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。
调查人员
- 首席研究员:Jill M Wecht, Ed.D、James J. Peter's VAMC
出版物和有用的链接
负责输入研究信息的人员自愿提供这些出版物。这些可能与研究有关。
一般刊物
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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)
2018年6月1日
初级完成 (实际的)
2021年12月31日
研究完成 (实际的)
2021年12月31日
研究注册日期
首次提交
2018年2月15日
首先提交符合 QC 标准的
2018年7月25日
首次发布 (实际的)
2018年7月26日
研究记录更新
最后更新发布 (实际的)
2025年3月25日
上次提交的符合 QC 标准的更新
2025年2月18日
最后验证
2025年2月1日
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