In Vivo Characterization of Inflammation With Ferumoxytol, an Ultrasmall Superparamagnetic Iron Oxide Nanoparticle, on 7 Tesla Magnetic Resonance Imaging
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 入组人数
- 14
- 试验地点
- 1
- 主要终点
- change in gradient-echo T2*-weighted signal in an iron-rich brain structure, the globus pallidus
研究概览
简要总结
Background:
- Contrast agents help things show up better on magnetic resonance imaging (MRI) scans. Researchers want to see if the drug ferumoxytol is a good contrast agent. They want to determine that it does not cause prolonged MRI changes in the brain and to see if it helps identify inflammation in multiple sclerosis
Objective:
- To learn how ferumoxytol can be used to image inflammation in multiple sclerosis (MS).
Eligibility:
- Adults ages 18 70 who have MS.
- Healthy volunteers ages 18 70.
Design:
- Participants will have 5 clinic visits over 6 months.
- Participants will be screened with a medical history, neurological exam, and blood draw. Full clinical measures will be obtained.
- Participants will have a 7 tesla brain MRI scan that may include gadolinium contrast agent. The MRI is a metal cylinder in a strong magnetic field. The participant will lie on a table that can slide in and out of the cylinder.
- During visit 2, ferumoxytol with be given through a catheter (a thin plastic tube) that is inserted with a needle into a vessel in the arm.
<TAB>- Participants will then have a 7 tesla MRI scan of the brain..
- At each of the next 3 clinic visits, participants will have a 7 tesla brain MRI and have blood drawn. The MRIs may include gadolinium.
- Participants may have a full neurologic exam at these visits. At the final visit, full clinical measures will be obtained.
- Participants may have more MRI scans if a 6-month MRI shows ferumoxytol still in the brain.
详细描述
Objective
The goals of this pilot study are to (1) demonstrate the safety of ferumoxytol, a United States Food and Drug Administration (FDA) approved drug used in the treatment of iron deficiency anemia, as a contrast agent for brain magnetic resonance imaging (MRI), as determined by a lack of long-term signal change in healthy volunteers (HV) and people with multiple sclerosis (MS); (2) determine if ferumoxytol enhancement can be detected in MS lesions on 7-tesla (T) MRI; and (3) examine the spatial and temporal enhancement patterns of ferumoxytol compared to patterns seen with gradient-echo imaging and gadolinium contrast in MS lesions.
Study population
Up to 10 HVs and up to 10 participants with MS will be recruited for this study.
Design
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Diagnostic
- 盲法
- None
入排标准
- 年龄范围
- 18 Years 至 70 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •INCLUSION CRITERIA:
- •HEALTHY VOLUNTEER INCLUSION CRITERIA
- •age between 18 and 70 (inclusive)
- •able to give informed consent
- •brain MRI within 2 years of study enrollment that shows no clinically significant abnormalities, in the judgment of a board-certified and NIH-credentialed neuroradiologist
- •PATIENT INCLUSION CRITERIA
- •age between 18 and 70, inclusive
- •able to give informed consent
- •diagnosis of multiple sclerosis according to revised McDonald Criteria
排除标准
- •GENERAL EXCLUSION CRITERIA:
- •screening labs demonstrating any value for hepatic or renal function levels out of the range of normal, to include AST, ALT, bilirubin, alkaline phosphatase, creatinine, eGFR
- •evidence of polycythemia vera with hemoglobin levels more than 1 standard deviation above the NIH laboratory s normal level
- •iron overload syndromes, including hemochromatosis, or subjects with evidence of iron overload with a baseline ferritin level greater than 370 ng/ml and percent saturation of transferrin level greater than 40%.
- •previous or current alcohol and/or substance abuse per medical history or medical records
- •medical contraindications for MRI (e.g., any non-organic implant or other device such as a cardiac pacemaker or infusion pump or other metallic implants, objects, or body piercings that are not MRI-compatible or cannot be removed)
- •psychological contraindications for MRI (e.g., claustrophobia), to be assessed at the time the medical history is collected
- •pregnancy or current breastfeeding
- •reported history of clinically significant impaired hearing, because people with impaired hearing are at increased risk of sound-induced damage from the MRI scanner
- •known allergy to dextran or drugs containing iron salts or any previous history of severe allergic reactions, anaphylaxis, to any drug
- •clinically significant medical or neurological disorders that, in the judgment of the investigators might expose the patient to undue risk of harm confound study outcomes or prevent the participant from completing the study; examples of such conditions include but are not limited to diagnosis of certain types of cancer, cardiopulmonary conditions such as congestive heart failure, or uncontrolled hypertension
- •ADDITIONAL PATIENT EXCLUSION CRITERION:
- •4 or more gadolinium-enhancing lesions on the screening scan
研究组 & 干预措施
ferumoxytol
A 510 mg dose (17 mL) of ferumoxytol diluted in 50 mL of 0.9% normal saline will be intravenously infused over 17 minutes
干预措施: Ferumoxytol (Drug)
结局指标
主要结局
change in gradient-echo T2*-weighted signal in an iron-rich brain structure, the globus pallidus
时间窗: 6 months following ferumoxytol administration
determine if ferumoxytol induces long-lasting brain signal intensity changes in HV and MS
次要结局
未报告次要终点