Early Tapering of Immunosuppressive Agents to Immunomodulation to Improve Survival of AML Patients

May 9, 2017 updated by: Yang Jun, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine

Early Tapering of Immunosuppressive Agents After Allogeneic Hematopoietic Stem Cell Transplantation Can Improve the Survival of Patients With Advanced Acute Myeloid Leukemia.

Early reduction of immunosuppressive agents after HLA matched donor transplantation can improve the survival of advanced stage acute myeloid leukemia.

single-center, open clinical study

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Detailed Description

Although 60-80% of AML patients can achieve complete remission through conventional chemotherapy, relapse is still a common problem. For patients unlikely to respond, re-induction attempts may be dismal, leading to more organ toxicity and increased tumor resistance. In addition, 10% to 40% of patients are primary induction failure (PIF) or resistant disease. AML with PIF or relapse still represents one of the most poor outcomes. In such settings, allogeneic transplantation(allo-HSCT) remains the best prospect of curative potential in a small percentage of patients.

However, several retrospective studies have reported long-term survival rates only of 10% to 40% for patients with AML not in remission at the time of allo-HSCT. Michel Duval et al reported that leukemia progression was the single most frequent cause of failure( 42% for AML) for these patients with advanced disease. It is widely accepted that advanced disease status at transplantation is a significant adverse-risk factor for post-HSCT relapse. Thus, how to improve the recurrence rate of these advanced patients after transplantation is still the main problem.

Dose intensity is a main cause for relapse. In order to improve the outcome of allo-HSCT for advanced leukemia, many scholars design the intensified conditioning or the sequential strategy of cytoreductive chemotherapy followed immediately by intensified myeloablative conditioning (MAC) regimens.With increasing dosage, the chance of relapse decreases but the incidence of acute graft-versus-host disease (GvHD) and non-relapse mortality(NRM) increase. How to well-balance NRM versus relapse is still the subject of much debate and investigation. So many centers developed reduced intensity conditioning(RIC) regimens based on the combination of alkylating agents with a purine analog and TBI, whereby the dose of TBI or the alkylating agent is usually reduced by at least 30% compared with a conventional ablative regimen. And an increased dose of alkylating agents as part of RIC may be associated with better leukemia free survival and the lower NRM.

Apart from the conditioning regimen, curative potential of allo-HSCT is largely based on immune-mediated graft-versus-leukemia(GvL)effects caused by donor T cells contained in the graft. The occurrence of GvHD is thought to be associated with a GvL effect. Since 1990, it has been known that leukemic relapses after allo-HSCT can be successfully treated by the induction of a GvL reaction. Strategies of adoptive immunotherapy such as donor lymphocyte infusion (DLI) and withdrawal of immunosuppression are proved to be able to enhance GvL effects. Many results show that the clinical benefit is limited to a minority of patients relapsed posttransplant, so new strategies such as prophylactic DLI (pDLI) before overt relapse is used in many center. But the results is varied from each centers. Liga M et reported that Patients with leukemia who received low-dose pDLI after allo-HSCT is associated with a relatively high incidence of severe GvHD. Furthermore, finding matched unrelated donors(MUD) again in a timely manner may be difficult and limit access to this treatment and the DLI process itself is more complicated.

Cyclosporine(CsA) withdrawal is generally accepted as first-line treatment in patients with relapse after allo-HSCT. In some studies, the early withdrawal of immunosuppression even in the absence of DLI, can prevent overt morphologic relapse in advanced patients.. AH Elmaagacli et al studied the immunomodulating effect of withdrawal of immunosuppression, the result showed that a probability of 10% for achieving and remaining in remission with AML 3 years after relapse posttransplant, patients with advanced CML and ALL had no chance of achieving and remaining in remission in the same time period. The best results have been seen in CML in early relapse. F Rosenow et al showed that low-tumor burden, defined by the blast count in BM aspirates, is one of the important prognostic factors for successful immune intervention. In a retrospective analysis, Sairafi et al also demonstrated that early immune intervention in case of impending relapse was more effective compared with late intervention after overt relapse. Since withdrawing immunosuppression allows for increased GvL effects, prevention may be the most feasible and effective means of managing relapse after allo-HSCT. On the basis of these results, we designed a prospective clinical study to decrease relapse risk in patients achieving CR with early reduction of immunosuppressive agents.As usual,during the first month, blood CsA levels were kept at 100-150 ng/mL in patients with sibling donors and 200-300 ng/mL in patients with a matched unrelated donors (MUD) and mismatched related donors(haplo-SCT). In the absence of GVHD, CsA was discontinued after 3-4 months when HLA-identical sibling donors were used and after 6 months when unrelated donors were used.In this clinical study,immunosuppressive agents were adjusted according to the schedule. Usually in the absence of GvHD, immunosuppressive agents were gradually reduced by 6 weeks and discontinued in three months after transplant in the advanced patients even if complete donor chimerism (CDC) achieved in matched unrelated donors(MUD) while immunosuppressive agents were gradually reduced by 2 months and discontinued in four months after transplant in the advanced patients in haploidentical SCT. If donor chimerism had not achieved CDC with no significant acute GVHD at four weeks after HSCT, immunosuppressive agents were gradually reduced. If GvHD was present during the time of immunosuppressive agents reduction, CsA was added again and tapering was done over longer periods. Immunosuppressive agents were regularly reduced by 3 months and discontinued in the 5 months without GvHD in the CR group. We used the result of chimerism as the reference. The key point in this clinicaltrial was emphasizing the early reduction of immunosuppressive agents according to the time point after transplant and the clinical symptoms. The ultimate goal of therapy is to minimize GvHD while maintaining GvL effects in order to enhance long-term disease control in the advanced patients.

Study Type

Interventional

Enrollment (Anticipated)

100

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

  • Name: xianminsong song, doctor
  • Phone Number: 13501672508
  • Email: shongxm@139.com

Study Locations

  • China
    • Shanghai
      • Shanghai, Shanghai, China, 200127
        • Recruiting
        • Shanghai First People's Hospital
        • Contact:
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

16 years to 58 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria: - According to the World Health Organization (WHO) classification,patients diagnosed with acute myeloid leukemia were enrolled in this study.

Performance status scores no more than 2 (ECOG criteria). Adequate organ function as defined by the following criteria: alanine transaminase （ALT）, aspartate transaminase（AST） and total serum bilirubin <2×ULN (upper limit of normal) Serum creatinine and blood urea nitrogen(BUN) <1.25×ULN. Adequate cardiac function without acute myocardial infarction, arrhythmia or atrioventricular block, heart failure, active rheumatic heart disease and cardiac dilatation(the patients has been improved after treatment of the disease and are not expected to affect transplant can include in the study).

Absence of any other contraindications of stem cell transplantation. Willingness and ability to perform HSCT. Signed and dated informed consent document indicating that the patient (or legally acceptable representative) has been informed of all pertinent aspects of the trial prior to enrollment.

Willingness and ability to comply with scheduled visits, treatment plans, laboratory tests, and other study procedures.

Exclusion Criteria:

Presence of any condition inappropriate for HSCT. Life expectancy < 3 months because of other severe diseases. Presence of any fatal disease, including respiratory failure, heart failure, liver or kidney function failure et al.

Uncontrolled infection. Pregnancy or breastfeeding. Has enrolled in anther clinical trials Other severe acute or chronic medical or psychiatric condition or laboratory abnormality that may increase the risk associated with study participation or study drug administration, or may interfere with the interpretation of study results, and in the judgment of the investigator would make the patient inappropriate for entry into this study.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: early reduction
Usually in the absence of GvHD, immunosuppressive drugs(Cyclosporine) were gradually reduced by 6 weeks and discontinued in three months after transplant in the advanced patients while immunosuppressive agents were gradually reduced by 2 months and discontinued in four months after transplant in the advanced patients in haploidentical SCT even if complete donor chimerism (CDC) achieved. If donor chimerism had not achieved CDC with no significant acute GVHD at four weeks after HSCT, immunosuppressive agents were gradually reduced. If GvHD was present during the time of immunosuppressive agents reduction, CsA was added again and tapering was done over longer periods.
Drug: Cyclosporine
Patients with advanced AML received early tapering of immunosuppressive drugs(Cyclosporine)
Other Names:
  • immunosuppressive agents
Placebo Comparator: routine reduction
Arm/Group Descriptions.Immunosuppressive drugs(cyclosporine) were routine reduced by 3 months and discontinued in the 5 months without GvHD in the CR group. We used the result of chimerism as the reference.
Drug: routine reduction of immunosuppressive drugs(cyclosporine)
patients with AML in CR were given the routine reduction of immunosuppressive drugs(cyclosporine)
Other Names:
  • cyclosporine

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
relapse free survival(RFS)
Time Frame: 2 years
PFS were defined as the time from stem-cell infusion to relapse, disease progression from any cause.
2 years

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Progress free survival (PFS) rate
Time Frame: 2 years
PFS were defined as the time from stem-cell infusion to relapse, disease progression,or death from any cause
2 years
Overall survival rate
Time Frame: 2 years
OS were defined as the time from stem-cell infusion to death from any cause
2 years
Transplant related mortality
Time Frame: up to 2 year
TRM were defined as death within 100 days of high-dose therapy not related to the disease,relapse or progression
up to 2 year

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine

Investigators

  • Study Chair: xinpeng wang, doctor, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2010

Primary Completion (Anticipated)

January 1, 2020

Study Completion (Anticipated)

January 1, 2021

Study Registration Dates

First Submitted

May 5, 2017

First Submitted That Met QC Criteria

May 9, 2017

First Posted (Actual)

May 12, 2017

Study Record Updates

Last Update Posted (Actual)

May 12, 2017

Last Update Submitted That Met QC Criteria

May 9, 2017

Last Verified

May 1, 2017

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2017KY21

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

Yes

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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