Randomized, Double-Blind, Placebo-Controlled Study With Open-Label Extension to Evaluate the Efficacy and Safety of Avatrombopag for the Treatment of Chemotherapy-Induced Thrombocytopenia in Subjects With Active Non-Hematological Cancers
Overview
- Phase
- Phase 3
- Intervention
- Avatrombopag
- Conditions
- Chemotherapy-induced Thrombocytopenia
- Sponsor
- Sobi, Inc.
- Enrollment
- 122
- Locations
- 1
- Primary Endpoint
- Percentage of Subjects Who do Not Require Platelet Transfusion, Dose Reduction in Chemotherapy by 15%, or Chemotherapy Delay by >=4 Days
- Status
- Completed
- Last Updated
- 2 years ago
Overview
Brief Summary
Phase 3 randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of avatrombopag in subjects with chemotherapy-induced thrombocytopenia receiving chemotherapy for the treatment of ovarian, lung (small cell and non-small cell) and bladder cancer.
Detailed Description
Subjects will receive placebo controlled test treatment for one cycle of chemotherapy followed by an observational cycle. Subjects will have the option to continue into an open label extension period for all remaining chemotherapy cycles within the current regimen. After the follow-up visit, all subjects will continue to a long-term safety follow-up period.
Investigators
Eligibility Criteria
Inclusion Criteria
- •Men and women greater than or equal to 18 years of age;
- •A diagnosis of ovarian, lung (small cell or non-small cell) or bladder cancer requiring systemic chemotherapy
- •Participant receiving a chemotherapy regimen given in a 21 or 28-day cycle, including 1 or more of the following agents or class of agents:
- •Nucleoside analog, including gemcitabine and fluorouracil;
- •Carboplatin or cisplatin;
- •Anthracycline; or
- •Alkylating agent;
- •Participant experienced severe thrombocytopenia, defined as 2 platelet counts \<50 x 109/L measured at least 24 hours apart, during the qualifying chemotherapy cycle, of their current chemotherapy regimen
- •ECOG performance status \<=2
Exclusion Criteria
- •Participant has experienced \>=Grade 2 CIT other than during the current chemotherapy treatment regimen within 6 months of Screening;
- •Participant has any history of hematologic malignancies, including leukemia, myeloma, myeloproliferative disease, lymphoma, or myelodysplastic diseases;
- •Participant has received \>2 previous lines of chemotherapy or is receiving whole brain radiation during the study treatment period;
- •Participant has a known medical history of genetic prothrombotic syndromes
- •Participant has a history of arterial or venous thrombosis within 3 months of screening;
- •Use of vitamin K antagonists;
- •Participant has previously received a thrombopoietin receptor agonist or recombinant human thrombopoietin for the treatment of CIT within 3 months of screening
Arms & Interventions
Avatrombopag
Study is 2:1 randomization ratio (avatrombopag to placebo). Investigational product administered orally once daily for 5 days prior to chemotherapy and 5 days following chemotherapy treatment.
Intervention: Avatrombopag
Placebo
Study is 2:1 randomization ratio (avatrombopag to placebo). Investigational product administered orally once daily for 5 days prior to chemotherapy and 5 days following chemotherapy treatment.
Intervention: Placebo Oral Tablet
Outcomes
Primary Outcomes
Percentage of Subjects Who do Not Require Platelet Transfusion, Dose Reduction in Chemotherapy by 15%, or Chemotherapy Delay by >=4 Days
Time Frame: Randomization up to 33 days
Secondary Outcomes
- Duration of Severe Thrombocytopenia Defined as a Platelet Count <50 x 10^9/L(Randomization up to 33 days)
- Change in Platelet Count From Baseline (Nadir)(Randomization up to 33 days)
- Percentage of Subjects Who Did Not Have Major or Non-major Clinically Relevant Bleeding During the Period After Post-chemotherapy Study Drug Treatment in Cycle X+1 Through Chemotherapy Day of Cycle X+2.(Randomization up to 33 days)