Multiple Donor Regulatory T Cell (Treg) Infusions (T Reg DLI) for Severe Refractory Chronic Graft Versus Host Disease (GVHD) After Allogeneic Hematopoietic Stem Cell Transplantation (HSCT)
试验速览
- 阶段
- 1 期
- 状态
- 已完成
- 发起方
- 入组人数
- 18
- 试验地点
- 2
- 主要终点
- OVERALL RESPONSE RATE
研究概览
简要总结
This is a INTERVENTIONAL TRANSPLANTATION STUDY WITHOUT DRUGS.
The INTERVENTION is represented by the INFUSION of DONOR T REGULATORY CELL-ENRICHED LYMPHOCYTES to PATIENTS suffering from REFRACTORY CHRONIC GVHD after ALLOGENEIC HEMATOPOIETIC STEM CELL TRANSPLANTATION.
The study includes a DOSE ESCALATION PHASE followed by a MTD PHASE as detailed in the following chapter.
The primary objective of the dose escalation study will be SAFETY, leading to the definition of the MTD of T reg cells. For the MTD study the primary objective will be the OVERALL RESPONSE RATE at three months after the 3rd Treg infusion.
The study is single center single arm open label and includes a DOSE ESCALATION phase followed by an EXTENDED PHASE with the MAXIMUM TOLERATED DOSE (MTD).
The aim of the study is to assess whether multiple infusions of donor-derived purified T regulatory cells (T reg DLI) in patients with steroid-refractory chronic GVHD is safe and whether it may induce clinical remission of GVHD.
详细描述
The procedure under study is the infusion of patients with chronic GVHD with purified Treg cells obtained from the original HSC donor (T reg DLI).
T reg cells are PURIFIED utilizing the CliniMACS Plus Systems for depletion of CD8 and CD19 positive cells and enrichment for CD25high expressing. Treg purification will be performed according to GMP procedure by using the clinical grade CLINI-MACS® device. The protocol is detailed in chapter 3.5
The entire manufacturing process including cell harvesting, transport and Treg purification has been validated.
The feasibility of the selection of nTreg from human peripheral blood using the CliniMACS® System has been previously documented. In these studies, CD8+ and CD19+ cells were undetectable in the final blood products. Final content of CD4+CD25+CD127lo-expressing cells was in mean 79% (range 52-82%) with the improved CD25 enrichment procedure. This protocol has also been validated by two partner Centres in the Treg GENERATION CONSORTIUM, Liège and Boston, with results that meet the release criteria for infusion. These purification procedures provided between 0.98 and 2.93x10e6 Treg per kg. It is noteworthy that the degree of purity in terms of CD4+CD25+CD127- cells ranged between 72.80% and 93.90%.
According to the "Reflection paper on classification of advanced therapy medicinal therapy", published by the Committee for Advanced Therapies (CAT) of the European Medicine Agency on June 20th 2014 [EMA/CAT/600280/2010 Rev.1 lines 118-131] the Treg DLI SHOULD NOT BE CONSIDERED CELL THERAPY MEDICINAL PRODUCTS. Indeed somatic cell therapy medicinal product means a biological medicinal product which fulfils BOTH following two characteristics: (a) contains or consists of cells or tissues that have been subject to substantial manipulation so that biological characteristics, physiological functions or structural properties relevant for the intended clinical use have been altered, or of cells or tissues that are not intended to be used for the same essential function(s) in the recipient and the donor; (b) is presented as having properties for, or is used in or administered to human beings with a view to treating, preventing or diagnosing a disease through the pharmacological, immunological or metabolic action of its cells or tissues. For the purposes of point (a), the manipulations listed in Annex I to Regulation (EC) No 1394/2007, including cutting, grinding, shaping, centrifugation, soaking in antibiotic or antimicrobial solutions, sterilization, irradiation, cell separation, concentration or purification, filtering, lyophilization, freezing, cryopreservation, and vitrification, shall not be considered as substantial manipulations. The procedures listed above for the preparation of the purified T reg product DO NOT FULFILL the definition of substantial manipulation.
研究设计
- 研究类型
- Interventional
- 分配方式
- Na
- 干预模型
- Single Group
- 主要目的
- Treatment
- 盲法
- None
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
- •Any patient who has undergone allogeneic stem cell transplantation with steroid refractory severe chronic GvHD either occurring post transplant, or induced by donor lymphocyte infusions (DLI) or T-cell add back. The diagnosis of chronic GvHD will based on NIH criteria, 2014 update. Chronic GvHD grading will be performed based on the updated NIH criteria. Severe chronic GVHD will be defined as having SCORE 3 in at least one organ or SCORE 2-3 in the lung.
- •Refractoriness to steroids will be defined based on the following criteria:
- •use of at least another immunosuppressive medication/strategy besides prophylactic calcineurin inhibitor for previous treatment for cGVHD .
- •use of prednisone ≥ 0.25 mg/kg/day (or 0.5 mg/kg every other day) (or equivalent dosing of alternate glucocorticoids) for at least 4 weeks prior to enrollment without complete resolution of signs and symptoms.
- •exclusion criteria:
- •Inability to obtain informed consent.
- •Patients with documented active EBV, CMV or fungal infection.
- •Patients with active HBV, HCV o HIV infection.
- •Patients with a diagnosis of solid tumor within the previous year with the exception of NON melanoma skin cancer.
- •Patients with evidence of Residual Disease at their last hematologic evaluation.
- •Patients in poor clinical conditions (ECOG 3-4)
- •Female patients with confirmed pregnancy
排除标准
- 未提供
结局指标
主要结局
OVERALL RESPONSE RATE
时间窗: 3 months after last T reg infusion
The response of chronic GVHD to treatment will be assessed per NIH consensus criteria. Overall response will be defined as either a complete o partial response. Complete Response is defined as resolution of all reversible manifestations related to cGVHD in a specific organ. Partial Response will be defined as at least 50% improvement in the scale used to measure disease manifestations related to cGVHD (e.g. a 50% decrease in skin rash from 80% BSA to 40% BSA), in at least one organ or site, without progression in measures at any other organ or site.
次要结局
未报告次要终点
研究者
Mario Arpinati
Dr Mario Arpinati
IRCCS Azienda Ospedaliero-Universitaria di Bologna