Clinical trial NCT02566395: Stem Cell Transplantation From HLA Partially-Matched Related Donors for Patients With Hematologic Malignancies
Official title: A Two Step Approach to Allogeneic Hematopoietic Stem Cell Transplantation From HLA Partially-Matched Related Donors for Patients With Hematologic Malignancies
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: PHASE3
Conditions: Acute Lymphoblastic Leukemia
Acute Myelogenous Leukemia
Myelodysplastic Syndrome
Chronic Myelogenous Leukemia
Non-Hodgkin Lymphoma
Hodgkin Lymphoma
Keywords: Stem Cell Transplantation
Haploidentical Donors
Lead sponsor: Northwell Health
Sponsor class: OTHER
Collaborators: name: New York Blood Center
First posted: 2015-10-02
Enrollment: 10
Sex: ALL
Minimum age (years): 2
Maximum age (years): 21
Standard ages: CHILD
ADULT
Accepts healthy volunteers: no
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: TREATMENT

Brief summary: This clinical pilot trial is intended to evaluate the feasibility, efficacy and safety of hematopoietic stem cell transplantation (HSCT) from Human Leukocyte Antigen (HLA)-mismatched related donors for children and young adults with hematologic malignancies who lack a suitably matched related or unrelated donor. The methodology will be one that has been successfully utilized in adult patients at Thomas Jefferson University.

Detailed description: Allogeneic HSCT is a potentially curative therapy for a number of malignancies. A barrier to the institution of this potentially curative strategy in hematologic malignancies is the availability of donors. Only 30% of patients in North America or Europe who may benefit from allogeneic HSCT will have an available HLA matched sibling donor. The ability to find a matched sibling donor is proportional to the number of children in the family. Because of the decreasing size of nuclear families, it is becoming less likely for patients to have an HLA identical matched sibling. Registries can provide a matched unrelated allogeneic stem cell graft for an additional 30% of patients. However this is not an option for patients who do not have a match in the registry, or whose disease status precludes them from waiting to identify an appropriate unrelated donor. The ability of finding a well matched unrelated donor is even more limited for segments of the population with mixed race ancestry as well as for African Americans who, because of a higher degree of HLA diversity, will be unlikely to find an unrelated donor who matches their HLA type.

In these settings it is easier and faster to identify a partially HLA-matched (or haploidentical) family member as a stem cell donor. The use of haploidentical donors broadens the application of HSCT because it is not as limited by family size or racial/ethnic HLA diversity. Because parents and children, as well as siblings can be used as haploidentical donors, this type of transplant enfranchises almost every segment of the population.

Since, in this study, the donor lymphoid and stem cell portions of the graft are collected and administered at different time points during the conditioning regimen, this approach to haploidentical HSCT is referred to as a 2 Step regimen. The approach does not involve ex vivo T cell depletion, but uses cyclophosphamide to tolerize donor lymphocytes within the framework of a myeloablative conditioning regimen. Preliminary experience with this approach in adult patients at Thomas Jefferson University for myeloablative haploidentical HSCT dates back to 2005 with the first trial using myeloablative conditioning formally launched in 2006. That initial trial met its accrual goals and the current trial is one of the successor trials derived from that experience.

The conditioning regimen includes total body irradiation (TBI) (1.5 Gray x 8) and CY (60 mg/kg x 2). Tacrolimus and Mycophenolate Mofetil (MMF) are used as post-transplant immunosuppression in relatively standard fashion.

The novel aspect of the regimen is in the administration of the graft. If one considers that a standard allograft consists of two components, a lymphoid portion and a stem cell portion, what is unique here is the administration of these two portions separately, at different time points during the conditioning regimen rather than together. The lymphoid portion, including a fixed dose of CD3+ cells/kg is administered prior to cyclophosphamide while the hematopoietic stem cell (HSC) portion of the graft is administered after cyclophosphamide has been metabolized and eliminated. Thus, the transplant occurs in 2 steps.

Eligibility criteria: Inclusion Criteria:

* Acute lymphoblastic leukemia
* Acue myelogenous leukemia
* Myelodysplastic syndrome
* Non-Hodgkin lymphoma
* Chronic myelogenous leukemia
* Adequate lung, liver, renal, cardiac function
* Performance status \>70
* Available related donor who is mismatched at ≥ 2 HLA alleles

Exclusion Criteria:

* Available HLA-identical related donor
* HIV positive
* Active uncontrolled infection
* Pregnancy
* Performance status ≤70

Primary outcomes:
measure: Hematopoietic engraftment
timeFrame: Day +30 post-transplantation
Secondary outcomes:
measure: 2-Year disease-free survival
timeFrame: 2 years post-transplantation
measure: Grade II-IV GvHD
timeFrame: Day +100 post-transplantatation
measure: Grade III-IV GvHD
timeFrame: Day +100 post-transplantation
measure: Relapse rate
timeFrame: 2 years post-transplantation
Other outcomes:
Locations:
city: New Hyde Park
country: United States
facility: Cohen Children's Medical Center
state: New York
Study officials:
affiliation: Cohen Children's Medical Center
name: Joel A Brochstein, MD
role: PRINCIPAL_INVESTIGATOR
References:
citation: Grosso D, Gaballa S, Alpdogan O, Carabasi M, Filicko-O'Hara J, Kasner M, Martinez-Outschoorn U, Wagner JL, O'Hara W, Rudolph S, Chervoneva I, Colombe B, Farley PC, Flomenberg P, Pro B, Sharma M, Shi W, Weiss M, Flomenberg N. A two-step approach to myeloablative haploidentical transplantation: low nonrelapse mortality and high survival confirmed in patients with earlier stage disease. Biol Blood Marrow Transplant. 2015 Apr;21(4):646-52. doi: 10.1016/j.bbmt.2014.12.019. Epub 2014 Dec 23.