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A Comparison of Reduced Dose Total Body Irradiation (TBI) and Cyclophosphamide With Fludarabine and Melphalan Reduced Intensity Conditioning in Adults With Acute Lymphoblastic Leukaemia (ALL) in Complete Remission. (ALL-RIC)

2019-02-03 17:33:24 | BioPortfolio

Summary

The current national acute lymphoblastic leukaemia (ALL) trial in adults investigated whether a low (reduced) intensity chemotherapy regimen prior to transplant could improve the outcome of patients with ALL who are over 40 years of age. The results (60% 2 year survival) are very encouraging but patients who come to transplant with small amounts of 'residual' disease had less good outcomes. The goal of this trial is to see if a slightly stronger chemotherapy regimen (involving total body irradiation, (TBI)) can improve results by reducing the chance of the disease coming back (relapsing) without increasing the chance of not surviving the transplant. Up to 242 patients will be 'randomised' to the trial to receive either the established chemotherapy of fludarabine and melphalan or cyclophosphamide and TBI to compare the outcomes between the two treatment regimens. Other measures to reduce relapse will be the earlier use of donor white cell infusions and earlier stopping of immune suppressive drugs to enhance the immune effect of the transplanted cells (graft). Patients will be followed up for a minimum of 3 years. All patients on the next national ALL trial (UKALL XV) will be offered this trial but it will also be open to patients not on this study.

Description

TRIAL SYNOPSIS

Trial Design This is a 2 arm, phase II, multicentre, randomised clinical trial in adult patients with ALL in complete remission (CR) undergoing allogeneic stem cell transplantation (SCT) comparing the novel conditioning regimen of TBI and cyclophosphamide with the standard condition of Fludarabine/Melphalan/Alemtuzumab (FMA).

Patient will be stratified at randomisation by the donor type (sibling; unrelated) and by age (above; below 55 years of age). Patients eligible for entry into the trial will be randomised on a 1:1 basis to receive either the experimental treatment arm or the control arm.

Objectives Primary Objectives To compare the disease free survival (DFS) at two years of patients with ALL after a TBI and cyclophosphamide allograft with that of patients transplanted using the FMA conditioning regimen.

Secondary Objectives To compare overall survival (OS), cumulative incidence of disease relapse (CIR), non-relapse mortality (NRM), incidence of grade 2-4 acute graft-versus-host-disease (GvHD), incidence of chronic GvHD of any grade, occurrence and severity of veno-occlusive disease (VOD), duration of hospitalisation in the first year, quality of life (QoL), full donor chimerism at day 100 and TBI related symptomatic pulmonary toxicity between the control and experimental arm following allogenic SCT.

Exploratory Objectives To measure multi-lineage chimerism and molecular minimal residual disease (MRD) at 3 monthly intervals and the ability of planned donor lymphocyte infusion (DLI) to 'correct' mixed chimerism and reverse molecular relapse/persistence and reduce the incidence of frank haematologic relapse.

To ascertain if either of the conditioning arms is more effective in controlling disease in patients who are MRD positive before transplant.

Patient Population This trial will recruit patients with ALL in CR as defined by the WHO classification (Appendix 1). Patients enrolled onto the UKALL XIV registration study and the planned national UKALL XV study who are eligible for transplant will also be able to enrol onto ALL-RIC provided they meet the entry criteria.

Sample Size A minimum of 242 patients will be randomised 1:1 between the control and experimental treatment arms.

Trial Duration Patients will be recruited over 48 months across IMPACT centres. Patients will be followed up for a minimum of 5 years.

Study Design

Conditions

Acute Lymphoblastic Leukemia

Intervention

Fludarabine, Melphalan, Alemtuzumab, Cyclophosphamide, Mesna, Total Body Irradiation (8Gy)

Location

Heart of England Nhs Foundation Trust
Birmingham
United Kingdom
B95ST

Status

Recruiting

Source

University of Birmingham

Results (where available)

View Results

Links

Published on BioPortfolio: 2019-02-03T17:33:24-0500

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Medical and Biotech [MESH] Definitions

Irradiation of one half or both halves of the body in the treatment of disseminated cancer or widespread metastases. It is used to treat diffuse metastases in one session as opposed to multiple fields over an extended period. The more frequent treatment modalities are upper hemibody irradiation (UHBI) or lower hemibody irradiation (LHBI). Less common is mid-body irradiation (MBI). In the treatment of both halves of the body sequentially, hemibody irradiation permits radiotherapy of the whole body with larger doses of radiation than could be accomplished with WHOLE-BODY IRRADIATION. It is sometimes called "systemic" hemibody irradiation with reference to its use in widespread cancer or metastases. (P. Rubin et al. Cancer, Vol 55, p2210, 1985)

A sulfhydryl compound used to prevent urothelial toxicity by inactivating metabolites from ANTINEOPLASTIC AGENTS, such as IFOSFAMIDE or CYCLOPHOSPHAMIDE.

Irradiation of the whole body with ionizing or non-ionizing radiation. It is applicable to humans or animals but not to microorganisms.

An alkylating nitrogen mustard that is used as an antineoplastic in the form of the levo isomer - MELPHALAN, the racemic mixture - MERPHALAN, and the dextro isomer - MEDPHALAN; toxic to bone marrow, but little vesicant action; potential carcinogen.

Precursor of an alkylating nitrogen mustard antineoplastic and immunosuppressive agent that must be activated in the LIVER to form the active aldophosphamide. It has been used in the treatment of LYMPHOMA and LEUKEMIA. Its side effect, ALOPECIA, has been used for defleecing sheep. Cyclophosphamide may also cause sterility, birth defects, mutations, and cancer.

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