Phase I/II Study of Retroviral-Mediated Transfer of Iduronate-2-Sulfatase Gene Into Lymphocytes of Patients With Mucopolysaccharidosis II (Mild Hunter Syndrome)
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 发起方
- 入组人数
- 2
- 试验地点
- 1
研究概览
简要总结
OBJECTIVES: I. Evaluate the safety and feasibility of treating mucopolysaccharidosis II (mild Hunter syndrome) by lymphocyte gene therapy.
II. Determine the levels of iduronate-2-sulfatase enzyme in these patients attained by infusing increasing doses of lymphocytes transduced with a retroviral vector designed for insertion and expression of this iduronate-2-sulfatase gene (L2SN).
III. Determine the duration of survival of these transduced cells in these patients.
IV. Determine whether monthly infusion of L2SN-transduced lymphocytes accomplishes metabolic correction (as measured by glycosaminoglycan excretion), decrease in liver or spleen volume, any therapeutic effect upon cardiac and pulmonary dysfunction, or any other effects from treatment.
详细描述
PROTOCOL OUTLINE: Peripheral blood lymphocytes are harvested from patient by apheresis, stimulated to initiate the growth of T-lymphocytes, transduced with retrovirus L2SN containing iduronate-2-sulfatase, and reinfused into the patient.
Patients receive 12 monthly infusions of these retroviral-mediated gene transduced lymphocytes with the first three infusions in a dose escalation format.
Patients are monitored for at least 2 hours after completion of each infusion. Patients are followed at 1 year after treatment, and then until death.
研究设计
- 研究类型
- Interventional
- 主要目的
- Treatment
入排标准
- 年龄范围
- 18 Years 至 —（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 否
入选标准
- •PROTOCOL ENTRY CRITERIA:
- •-Disease Characteristics--
- •Mucopolysaccharidosis II (mild Hunter syndrome) as defined by the following:
- •Characteristic coarse facial features, hepatosplenomegaly, and radiographic evidence of dysostosis multiplex
- •Elevated urinary excretion of glycosaminoglycans in 3 urine specimens
- •Deficient iduronate-2-sulfatase enzyme activity as measured in plasma and leukocytes
- •Mutation consistent with mild Hunter syndrome must have either: A single base substitution of the coding sequence not previously associated with severe Hunter syndrome phenotype OR An exon-skipping mutation that would allow for occasional production of (minimal amounts of) normal protein
- •-Patient Characteristics--
- •Cardiovascular: No severe cardiac disease
- •Pulmonary: No severe respiratory disease
- •Must have IQ score of 80 or higher
- •Effective contraception required of all fertile patients
排除标准
- 未提供