Ferumoxytol Enhanced Magnetic Resonance Imaging of Type 1 Diabetes Progression
试验速览
- 阶段
- 不适用
- 发起方
- 入组人数
- 65
- 试验地点
- 1
研究概览
简要总结
Type 1 diabetes results from the autoimmune destruction of the insulin-producing beta cells of the islets of Langerhans of the pancreas. Initially, diabetes is usually clinically silent with immune cells invading the pancreatic islets, a process termed insulitis, which eventually leads to loss of beta cells in the islets. If enough beta cells are destroyed, the body can not make enough insulin to maintain blood sugars in the normal range and clinical diabetes develops. The purpose of this study is to assess the ability of magnetic resonance imaging with ferumoxytol to detect changes in the pancreas associated with the insulitis of type 1 diabetes.
详细描述
This study is designed to monitor changes associated with the development of autoimmune diabetes. A magnetic resonance imaging (MRI) based technique will be used to noninvasively measure changes within the pancreas associated with the development of autoimmune diabetes. The iron-containing drug ferumoxytol will be used as an intravenous MRI contrast agent for this study.
Individuals will be asked to participate one time, for 1-year, or over a 2-year period. During the development phase of the study, each imaging series will consist of 3 or more MRI scans. At the initial imaging visit a pre-ferumoxytol scan will be done, followed by ferumoxytol injection, and then an immediate post-injection scan. The subsequent scans will be concluded within 96 hours of ferumoxytol injection (typically at 48 hours). Those who participate for 1-year will have repeat imaging at approximate times 0, 6 months, and 12 months. Those who participate for 2-years will have repeat imaging at approximate times 0, 3, 6, 12, 18, and 24 months after enrollment.
Measurements of autoimmunity and metabolic parameters (collected as part of collaborating diabetes clinical studies) will be used in the data analysis for the longitudinal portion of the study. Stimulated C-peptide will be measured as a marker of endogenous insulin production capacity and beta-cell mass.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Prospective
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- •Participation in a collaborating diabetes clinical trial
- •Able to understand written consent document and HIPAA authorization prior to initiation of study related procedures and are willing to participate
排除标准
- •Known allergy to ferumoxytol or iron
- •Individuals who are pregnant or lactating
- •Iron saturation above the upper limit of normal
- •Individuals with a counter-indication to MRI, such as the presence of metallic prostheses or implanted metal device (e.g., infusion pump, defibrillator)
- •Individuals with known clinical conditions that may lead to iron overload including hemochromatosis, cirrhosis, or sickle cell disease
研究组 & 干预措施
Low Risk Pre-Type 1 Diabetes
Low risk pre-type 1 diabetes is defined as first degree family relative with type 1 diabetes but no islet autoantibody markers (GAD, IAA, or IA-2).
干预措施: ferumoxytol (Drug)
Clinical Type 1 Diabetes
This group will be subdivided into individuals with recent onset clinical type 1 diabetes (within 6 months of diagnosis), latent autoimmune diabetes of the adult, and longer standing type 1 diabetes.
干预措施: ferumoxytol (Drug)
High Risk Pre-Type 1 Diabetes
High risk pre-type 1 diabetes is defined as first degree family relative with type 1 diabetes and at least one islet autoantibody marker (GAD, IAA, or IA-2).
干预措施: ferumoxytol (Drug)
Normal Control
Normal control is based on history with no known history or family history of type 1 diabetes.
干预措施: ferumoxytol (Drug)
研究者
Jason Gaglia
Research Scientist
Massachusetts General Hospital