Eltrombopag for Enhancing Platelet Engraftment in Adult Patients Undergoing Cord Blood Transplantation

The purpose of this study is to determine whether Eltrombopag may shorten time to platelet engraftment after allogeneic cord blood transplantation.

Study Overview

• Status: Unknown
• Conditions: Hematological Malignancy; Bone Marrow Failure Syndrome
• Intervention / Treatment: Drug: Eltrombopag

Detailed Description

Platelet recovery is significantly hampered following umbilical cord blood (UCB) transplantation. Median time to platelet engraftment (defined as the first of 7 consecutive days of an unsupported platelet count of at least 20,000/microliter) in a large retrospective study was more than 70 days and cumulative incidence of platelet recovery at 6 months was 50.5%. In the pediatric population with acute leukemia median time to platelet engraftment with UCB transplantation was 59 days and cumulative incidence of platelet recovery at 6 months was 43%-73%, depending on human leukocyte antigen (HLA) disparity and cell dose. Recently, in a cohort of adult patients given myeloablative conditioning followed by double UCB transplantation, the cumulative incidence of platelet recovery (≥ 50,000/microliter)at 100 days was 53%. In another cohort of patients given reduced intensity conditioning regimen followed by single or double UCB transplantation, the median time to platelet recovery (≥ 50,000/microliter) and cumulative incidence of platelet recovery at 6 months were 49 days and 65%, respectively. Thus, after UCB transplantations, patients are platelet transfusion-dependent for prolong periods of time, resulting in many drawbacks, such as exposure to blood transfusions hazards, higher incidence of platelet allo-reactivity and extended periods of bleeding diathesis and undesirable costly and long hospitalizations.

Eltrombopag is a thrombopoietin-receptor agonist that initiates thrombopoietin-receptor signaling and thereby inducing proliferation and maturation of megakaryocytes.Administration of eltrombopag increased platelet production in volunteers with normal platelet counts, patients with thrombocytopenia secondary to hepatitis C virus infection and in patients with chronic immune thrombocytopenic purpura.

We will evaluate the safety and efficacy of eltrombopag treatment given early after UCB transplantation. The study is an open non-comparative study. The primary outcome will be cumulative incidence of partial platelet engraftment (first of 7 consecutive days of an unsupported platelet count of at least 20,000/microliter)at day 50 post transplantation. Secondary objectives are safety, tolerability and other transplantation related outcomes.

• Study Type: Interventional
• Enrollment (Anticipated): 20
• Phase: Phase 2

Contacts and Locations

• Study Contact: Name: Ron Ram, MD; Phone Number: 972-50-4065621; Email: RonRa@clalit.org.il

Study Locations

• Israel
  • Jerusalem, Israel
    • Recruiting
    • Hadassah Hospital
    • Contact: Michael Shapira, MD; Phone Number: 972-50-7874433
  • Petach Tikva, Israel
    • Recruiting
    • Davidof Cancer Center, Beilinson hospital, Rabin medical center
    • Principal Investigator: Moshe Yeshurun, MD

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

1. Patient ≥ 18 year old.
2. Patients receiving unmanipulated single or double umbilical cord blood allogeneic grafts.
3. Malignant and non malignant indications for transplantation.
4. Myeloablative and reduced intensity conditioning regimens.
5. Patients must meet all other pre-transplantation criteria of the transplantation center including acceptable tests of heart, liver, kidney, and lung function (standard screening for transplantation per PI, and co-investigators).
6. Able to give written informed consent for a clinical trial.
7. Able to comply with study protocol.

Exclusion Criteria:

1. Indications for transplantation

   1. Patients with primary myelofibrosis.
   2. M7 (French-American-British classification) acute myeloid leukemia. Acute leukemia secondary to a myeloproliferative neoplasm.
   3. Patients with persistent acute leukemia (>5% bone marrow blasts) at the time of transplantation.
2. Patients with prior thromboembolic event. Patients with previous catheter related thrombosis will be eligible if more than 3 months elapsed.
3. Hypersensitivity to eltrombopag.

4. Liver enzymes abnormalities:

   Alanine transaminase (ALT) levels > 3 times the upper limit of normal (ULN) or serum bilirubin > 1.5 ULN (unless due to Gilbert's syndrome or hemolytic bilirubin).

5. Pregnancy: Women of child-bearing potential and men must agree to use contraception prior to study entry and for the duration of study participation. A woman of child-bearing potential is defined as a woman who has not been naturally post-menopausal for at least 12 consecutive months or with no previous surgical sterilization.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm

Intervention / Treatment

Experimental: Eltrombopag; Eltrombopag will be given orally as a single daily dose. From day +1 after cord blood transplantation, start eltrombopag 100 mg/d. If primary end point not reached on day +14,then from day +15 - 150 mg/d. If primary end point not reached on day +28 then from day +29 - 200 mg/d. If primary end point not reached on day +42 then from day +43 and on - 300 mg/d (maximal dose). If dose not tolerated, return to last tolerated dose. Eltrombopag will be discontinued after platelet count has exceeded 50,000/microliter for 14 consecutive days without administration of platelets. In case of decline of platelet count < 30,000/microliter within 15 days from eltrombopag discontinuation, it will be resumed for additional 4 weeks. After 4 weeks we will re-attempt to hold the drug.

Drug: Eltrombopag; From day +1, start eltrombopag 100 mg/d. If primary end point not reached on day +14, then from day +15 - 150 mg/d. If primary end point not reached on day +28 then from day +29 - 200 mg/d. If primary end point not reached on day +42 then from day +43 and on - 300 mg/d maximal dose). If present dose not tolerated, return to last tolerated dose. Eltrombopag will be discontinued after platelet count has exceeded 50,000/microliter for 14 consecutive days without administration of platelets. In case of decline of platelet count < 30,000/microliter within 15 days from eltrombopag discontinuation, it will be resumed for additional 4 weeks. After 4 weeks we will re-attempt to hold the drug (if the threshold of platelet count >50,000/microliter will be reached again).; Other Names: Revolade

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Platelet engraftment rate up to 50 days post transplantation, defined as the first of 7 consecutive days of an unsupported platelet count of at least 20,000/microliter.	50 days

Secondary Outcome Measures

Outcome Measure	Time Frame
Time to partial platelet engraftment, defined as the first of 7 consecutive days of an unsupported platelet count of at least 20,000/microliter.	180 days
Time to sustained complete platelet engraftment defined as the first of 7 consecutive days of an unsupported platelet count of at least 50,000/microliter.	180 days
Complete platelet engraftment rates up to 50 days post transplantation defined as the first of 7 consecutive days of an unsupported platelet count of at least 50,000/microliter.	50 days
Time to neutrophil engraftment defined as the first of 3 consecutive days to achieve an absolute neutrophil count ≥ 500/microliter.	60 days

Other Outcome Measures

Outcome Measure	Measure Description	Time Frame
Any grade 3/4 adverse event	Number of participants with any grade 3/4 adverse event as a measure of safety and tolerability.	12 months
Thromboembolic events	Number of participants with a thromboembolic event as a measure of safety.	12 months

Collaborators and Investigators

• Sponsor: Rabin Medical Center

Study record dates

Study Major Dates

• Study Start: January 1, 2013
• Primary Completion (Anticipated): June 1, 2016
• Study Completion (Anticipated): June 1, 2016

Study Registration Dates

• First Submitted: December 6, 2012
• First Submitted That Met QC Criteria: December 20, 2012
• First Posted (Estimate): December 28, 2012

Study Record Updates

• Last Update Posted (Estimate): June 19, 2015
• Last Update Submitted That Met QC Criteria: June 18, 2015
• Last Verified: February 1, 2013

More Information

Terms related to this study

• Keywords: Eltrombopag; Cord blood transplantation; Platelet engraftment
• Additional Relevant MeSH Terms: Neoplasms; Neoplasms by Site; Bone Marrow Diseases; Hematologic Diseases; Hematologic Neoplasms; Bone Marrow Failure Disorders; Pancytopenia
• Other Study ID Numbers: 7114