ATG Could Improve the Outcome Of Hematopoietic Stem Cell Transplant in Patients With Highly Aggressive T Cell Tumors (HSCT)

November 8, 2014 updated by: Yang Jun, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine

Hematology , Shanghai Jiaotong University Affiliated Shanghai First People's Hospital, Shanghai, China

The clinical application and effect of ATG based myeloablative conditioning regimen after allogeneic hematopoietic stem cell transplantation in adult patients with aggressive T-cell lymphomas.

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Detailed Description

Aggressive T-cell lymphomas (ATCLs), including peripheral T-cell lymphoma and T lymphoblastoid cell lymphoma/leukemia, represent 10% to 15% of non-Hodgkin's lymphomas (NHLs) in adults(1). ATCLs show a worse prognosis than that of B-cell lymphomas. Myeloablative allogeneic stem cell transplantation (allo-SCT) may be the only way to cure these patients, but the recurrence of the primary disease after transplantation is still an important prognostic factor (2). Optimizing the conditioning regimen is always the research hot topics in hematology fields. Polyclonal anti-thymocyte globulin (rabbit anti-thymocyte globulin, r-ATG) are currently used to prevent graft-versus -host(GVHD) disease in allogeneic stem cell transplantation, and also widely used for the prevention and treatment of acute rejection after solid organ transplant because of its strong immunomodulatory effects. ATG is used in allogeneic SCT for the prophylaxis of graft versus host disease by in vivo T cell depletion, including the complement-dependent cytotoxic response, antibody-dependent cell-mediated cytotoxicity, the opsonophagocytic role of phagocytic cells and induced apoptosis(3). But some scholars reported the ATG delayed immune reconstitution and hematologic reconstitution and leaded to the increase of the incidence of virus and fungal infections after transplantation. But it is often curable and does not affect the overall survival and quality of life of the patients (4). Because of its strong immune suppression and regulation, also on the basis of the above facts, ATG as GVHD prophylaxis is generally limited to the unrelated donor, or human leukocyte antigen（HLA）-mismatched related donor transplantation. But There are many issues still need to be studied. ATG has shown efficacy in preventing acute GVHD（aGVHD) in allo-SCT, but its efficacy in chronic GVHD (cGVHD) and long-term outcomes remains controversial. A systematic review and meta-analysis from Du k et al（5） reported that prophylactic use of ATG exerted a favorable effect in reducing cGVHD without survival impairment in a long term, although a higher relapse rate is a major threat.

Does the ATG also have the killing effect on the tumor cells of the lymphatic system? The vitro studies have confirmed this point recently. Grüllich(6) et al and the investigators study(7) both found that ATG can inhibit the proliferation and induce high level of apoptosis in the human lymphoblastic cell lines, such as Jurkat, Daudi, DG-75 , and myeloblastic cell lines K562, HL-60, KG1, and U937. ATG also has pro-apoptotic activity against the majority of primary leukemia cells, particularly those cells from lymphatic origin. In addition, ATG will not result in apoptosis of normal hematopoietic cells. Low-dose ATG can also stimulate normal hematopoietic colony growth. Therefore, ATG may be used as anti-lymphocyte tumor bio-therapeutics (such as rituximab) to increase the role of chemo-radiotherapy in the conditioning regimen. And ATG can remove the residual tumor lesions, which reduced the rate of tumor recurrence after transplantation. Although the vitro studies have clarified the role of ATG on the tumor cells of the lymphatic system, but no relevant reports on the anti-tumor effect of ATG in allo-SCT have been published. Further clinical observation need to be conducted.

As noted earlier, a higher relapse rate may be a major threat after ATG use（5）.In China, the conventional dose of 2.5mg/kg/day, 2-3 days of Thymoglobulin is commonly used as GVHD prophylaxis in the unrelated donor, or HLA-mismatched related donor transplantation but not in the HLA matched related donor transplantation (8). In order to observe the anti-tumor effect of this conditioning regimen in the aggressive T-cell lymphomas patients(including peripheral T-cell lymphoma and T lymphoblastoid cell lymphoma/leukemia, complete remission, partial remission, relapse after remission or refractory recurrent invasive patients), the investigators improved the drugs of conditioning regimen and increased the Thymoglobulin dose in the conditioning regimen for four days 10mg/kg total even in the HLA matched related donor transplantation. The purpose of this clinical trial is to reduce the incidence of GVHD at the same time does not increase the recurrence of the primary disease. The investigators expect that this ATG based conditioning regimen does play anti-tumor effect, reduce primary disease recurrence after transplantation, improve disease-free survival (DFS) and overall survival rate (OS) , as well as reduce the incidence and severity of GVHD, but the incidence of infection need to be observed.

Study Type

Observational

Enrollment (Anticipated)

63

Contacts and Locations

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

Study Locations

  • China
    • Shanghai
      • Shanghai, Shanghai, China, 200127

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

14 years to 56 years (Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Sampling Method

Probability Sample

Study Population

According to the World Health Organization (WHO) classification,study population is diagnosis of T cell tumor of lymphatic system sources (including peripheral T-cell lymphoma and T lymphoblastoid cell lymphoma/leukemia) confirmed by pathological examination, morphology, cytochemistry, immunophenotyping and chromosome examination, molecular biology including complete remission, partial remission, relapse after remission or refractory recurrent invasive patients

Description

Inclusion Criteria:

  • According to the World Health Organization (WHO) classification, diagnosis of T cell tumor of lymphatic system sources (including peripheral T-cell lymphoma and T lymphoblastoid cell lymphoma/leukemia) confirmed by pathological examination, morphology, cytochemistry, immunophenotyping and chromosome examination, molecular biology including complete remission, partial remission, relapse after remission or refractory recurrent invasive patients
  • 18 to 60 years old. Male or female
  • 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. 6．Has enrolled in anther clinical trials 7．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

  • Observational Models: Case-Only
  • Time Perspectives: Prospective

Cohorts and Interventions

Group / Cohort
Intervention / Treatment
highly aggressive T cell tumors
The study is to research the outcome of Rabbit Anti-human Thymocyte Globulin (ATG)based myeloablative conditioning regimen after allo-HSCT in patients with highly aggressive T-cell tumors.
Drug: Rabbit Anti-human Thymocyte Globulin (ATG)
The conditioning regimen in this study consisted of Rabbit antithymocyte globulin (ATG 2.5 mg/kg×4 days) , total-body irradiation (10 Gy in five fractions), cyclophosphamide (60 mg/kg×2 days) and etoposide or teniposide (30-40mg/kg) .
Other Names:
  • r-ATG

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Progress free surviva(PFS) rate at 2 years
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

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Leukocyte engraftment
Time Frame: 1 MONTH
Leukocyte engraftment:(was defined as the first of three consecutive days of peripheral white blood count >1000/ul.
1 MONTH
Platelet engraftment
Time Frame: 1 MONTH
Platelet engraftment:(was defined as the first of seven consecutive days of platelet counts of >50000/ul.
1 MONTH
Donor chimerism:
Time Frame: 2 YEARS
Quantitative chimerism analyzes were performed using short-tandem-repeat-based polymerase chain reaction technique sat regular intervals for every 4 weeks after allografting in bone marrow.
2 YEARS
Relapse incidence (RI)
Time Frame: 2 YEARS
1. T lymphoblastoid cell lymphoma/leukemia: Bone marrow blasts > 20% 2.peripheral T-cell lymphoma: any increased >50% in the sum of the diameter of any measurable lesions or the appearance of a new lesion.）
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(TRM)
Time Frame: 2 YEARS
TRM were defined as death within 100 days of high-dose therapy not related to the disease,relapse or progression
2 YEARS

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

Collaborators

The First Affiliated Hospital with Nanjing Medical University
The First Affiliated Hospital of Soochow University
Tang-Du Hospital

Investigators

  • Study Chair: liu guohua, 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

August 1, 2013

Primary Completion (Anticipated)

December 1, 2016

Study Completion (Anticipated)

July 1, 2017

Study Registration Dates

First Submitted

October 13, 2014

First Submitted That Met QC Criteria

November 8, 2014

First Posted (Estimate)

November 13, 2014

Study Record Updates

Last Update Posted (Estimate)

November 13, 2014

Last Update Submitted That Met QC Criteria

November 8, 2014

Last Verified

November 1, 2014

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2013（56）

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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