Phase III Study Of Gemcitabine, Dexamethasone, And Cisplatin Compared To Dexamethasone, Cytarabine, And Cisplatin Plus/Minus Rituximab [(R)-GDP vs (R)-DHAP] As Salvage Chemotherapy For Patients With Relapsed Or Refractory Aggressive Histology Non-Hodgkin's Lymphoma Prior To Autologous Stem Cell Transplant And Followed By Maintenance Rituximab vs Observation
Trial Snapshot
- Phase
- Phase 3
- Status
- Completed
- Sponsor
- NCIC Clinical Trials Group
- Enrollment
- 849
- Locations
- 27
- Primary Endpoint
- Response Rate of Patients After 2 Courses of Chemotherapy
Study Overview
Brief Summary
RATIONALE: Drugs used in chemotherapy, such as dexamethasone, cisplatin, gemcitabine, and cytarabine, work in different ways to stop cancer cells from dividing so they stop growing or die. Combining chemotherapy with autologous stem cell transplantation may allow the doctor to give higher doses of chemotherapy drugs and kill more cancer cells. Monoclonal antibodies, such as rituximab, can locate cancer cells and either kill them or deliver cancer-killing substances to them without harming normal cells. Giving rituximab as maintenance therapy after stem cell transplantation may kill any remaining cancer cells. It is not yet known which salvage chemotherapy regimen is more effective before autologous stem cell transplantation in treating relapsed or refractory non-Hodgkin's lymphoma.
PURPOSE: This randomized phase III trial is studying salvage chemotherapy using dexamethasone, cisplatin, and gemcitabine to see how well it works compared to dexamethasone, cisplatin, and cytarabine given before autologous stem cell transplantation in treating patients with relapsed or refractory aggressive non-Hodgkin's lymphoma. This trial also is studying giving rituximab as maintenance therapy to see how well it works compared to no further therapy after stem cell transplantation. Rituximab was added to both salvage treatment arms for CD20+ patients in a protocol amendment in 2005.
Detailed Description
OBJECTIVES:
Salvage therapy
Primary
- Compare the response rate and transplantation rate in patients with relapsed or refractory aggressive non-Hodgkin's lymphoma when treated with salvage chemotherapy comprising dexamethasone, cisplatin, and gemcitabine with or without rituximab vs a standard platinum-based regimen (dexamethasone, cisplatin, and high-dose cytarabine with or without rituximab).
- To compare the transplantation rates of the two protocol salvage regimens.
Secondary
Study Design
- Study Type
- Interventional
- Allocation
- Randomized
- Intervention Model
- Parallel
- Primary Purpose
- Treatment
- Masking
- None
Eligibility Criteria
- Ages
- 16 Years to 65 Years (Child, Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- Not provided
Exclusion Criteria
- Not provided
Arms & Interventions
Salvage arm I
Patients receive cisplatin IV over 60 minutes on day 1, dexamethasone IV or orally on days 1-4, and gemcitabine IV over 30 minutes on days 1 and 8.
Intervention: cisplatin (Drug)
Salvage arm I
Patients receive cisplatin IV over 60 minutes on day 1, dexamethasone IV or orally on days 1-4, and gemcitabine IV over 30 minutes on days 1 and 8.
Intervention: dexamethasone (Drug)
Salvage arm I
Patients receive cisplatin IV over 60 minutes on day 1, dexamethasone IV or orally on days 1-4, and gemcitabine IV over 30 minutes on days 1 and 8.
Intervention: gemcitabine hydrochloride (Drug)
Salvage arm II
Patients receive cisplatin IV over 24 hours on day 1, dexamethasone as in arm I, and cytarabine IV over 3 hours every 12 hours for a total of 2 doses on day 2.
Intervention: cisplatin (Drug)
Salvage arm II
Patients receive cisplatin IV over 24 hours on day 1, dexamethasone as in arm I, and cytarabine IV over 3 hours every 12 hours for a total of 2 doses on day 2.
Intervention: cytarabine (Drug)
Salvage arm II
Patients receive cisplatin IV over 24 hours on day 1, dexamethasone as in arm I, and cytarabine IV over 3 hours every 12 hours for a total of 2 doses on day 2.
Intervention: dexamethasone (Drug)
Maintenance arm I
Beginning on day 28 posttransplantation, patients receive rituximab IV once every 2 months for 6 doses (a total of 12 months) in the absence of disease progression or unacceptable toxicity.
Intervention: rituximab (Biological)
Outcomes
Primary Outcomes
Response Rate of Patients After 2 Courses of Chemotherapy
Time Frame: After 2 cycle of treatment
The overall response rate by arm is calculated as total number of responders (CR + CRu + PR) / (all patients in the ITT analysis population).
Transplantation Rate of Patients After 2 Courses of Chemotherapy
Time Frame: During period 1 (salvage chemotherapy)
Transplantation rate is defined as the number of patients who respond sufficiently to protocol salvage chemotherapy to be planned for transplantation minus those who do not meet the endpoint of successful transplantation, divided by the number of all randomized patients
Event-free Survival of Patients on Maintenance Randomization (Period 2)
Time Frame: during the period 2 (up to10 years)
Number of patients who develop EFS event during maintenance randomization (period 2)
Secondary Outcomes
- Toxic Effect(48 months)