Phase 1b/2, Multicenter, Open-label Study of Oprozomib and Dexamethasone in Patients With Relapsed and/or Refractory Multiple Myeloma

Phase 1

Terminated

• Conditions: Multiple Myeloma
• Interventions: Drug: Oprozomib; Drug: Dexamethasone

• Registration Number: NCT01832727
• Lead Sponsor: Amgen

Brief Summary

The primary objectives are:

Phase 1b:

* To determine the maximum tolerated dose (MTD) and recommended Phase 2 dose (RP2D) of oprozomib given orally, once daily, on 2 different schedules.

* To evaluate safety and tolerability

Phase 2:

* To estimate the overall response rate (ORR).

* To evaluate safety and tolerability

Detailed Description

The purpose of the Phase 1b portion of the study was to determine the maximum tolerated dose (MTD), the recommended phase 2 dose (RP2D), safety, and pharmacokinetics (PK) of oprozomib administered orally once daily in combination with dexamethasone, in participants with relapsed and/or refractory multiple myeloma, using a 3 + 3 dose-escalation scheme with and without step-up dosing. The MTD was defined as the highest dose level at which fewer than 33% of participants had a dose-limiting toxicity (DLT).

Study Timeline

• Study First Submitted: 2013-04-10
• Study First Submitted QC: 2013-04-11
• Study First Posted: 2013-04-16
• Study Start: 2013-07-02
• Primary Completion: 2019-06-25
• Study Completion: 2019-06-25
• Status Verified: 2020-06
• Results First Submitted: 2020-06-22
• Results First Submitted QC: 2020-06-22
• Last Update Submitted: 2020-06-22
• Results First Posted: 2020-07-13
• Last Update Posted: 2020-07-13

Recruitment & Eligibility

• Status: TERMINATED
• Sex: All
• Target Recruitment: 65

Inclusion Criteria

1. Diagnosis of multiple myeloma with measureable disease as indicated by 1 or more of the following:

   • a. Serum M-protein ≥ 500 mg/dL
   • b. Urine M-protein ≥ 200 mg/24 hours
   • c. Only for subjects without measurable serum and urine M-protein, serum free light chain: Involved free light chain (FLC) level ≥ 10 mg/dL, provided serum FLC ratio is abnormal

2. Patients requiring therapy who have relapsed and/or are refractory to their last therapy and have been treated with at least 1, but not more than 5, lines of multiple myeloma therapy. Prior therapy must have consisted of at least 1 regimen that included lenalidomide and/or bortezomib. Patients should be considered to be appropriate candidates for a clinical study by their treating physicians. Relapsed patients must have previously achieved ≥ minimal response (MR) on at least 1 line of therapy, as assessed by the treating physician. Refractory patients are allowed, but it is not required that patients be refractory to their last therapy. Primary refractory patients are allowed in the Phase 1b portion of the study only.

3. Males and females ≥ 18 years of age

4. Eastern Cooperative Oncology Group Performance Status (ECOG PS) 0-2

5. Adequate hepatic function, with bilirubin ≤ 1.5 times the upper limit of normal (ULN) in the absence of Gilbert's disease or hemolysis, aspartate aminotransferase (AST) ≤ 3 times ULN, and alanine aminotransferase (ALT) ≤ 3 times ULN

6. Absolute neutrophil count (ANC) ≥ 1000 cells/mcL, hemoglobin ≥ 7.0 g/dL, and platelet count ≥ 30,000 cells/mcL:

   • a. Patients must not have received platelet transfusions for at least 1 week prior to Screening.

   • b. Screening ANC must be independent of granulocyte colony-stimulating factor and granulocyte-macrophage colony-stimulating factor (G-CSF and GM-CSF) support for at least 1 week and of pegylated G-CSF for

     ≥ 2 weeks prior to first dose.

   • c. Patients may receive red blood cell (RBC) transfusions or receive supportive care with erythropoietin or darbepoetin in accordance with institutional guidelines.

7. Calculated or measured creatinine clearance (CrCl) of ≥ 30 mL/minute calculated using the formula of Cockcroft and Gault ([140 - Age] * Mass (kg) / [72 * creatinine mg/mL]). Multiply result by 0.85 if female.

8. Uric acid, if elevated, must be corrected to within laboratory normal range before dosing.

9. Patients must sign a written informed consent form in accordance with federal, local, and institutional guidelines.

10. Female patients of childbearing potential must have a negative serum or urine pregnancy test within 3 days prior to receiving the first dose of study drug and agree to use effective methods of contraception during the study and for 3 months following the last dose of study drug. Postmenopausal females (> 45 years old and without menses for > 1 year) and surgically sterilized females are exempt from these requirements. Male patients must use an effective barrier method of contraception during the study and for 3 months following the last dose if sexually active with a female of childbearing potential.

11. Prior carfilzomib is not required but is allowed if a patient had at least 2 cycles of carfilzomib alone or in combination with a dose of at least 20/27 mg/m^2, as long as the patient:

    • a. Had at least a partial response to prior carfilzomib therapy
    • b. Was not removed from carfilzomib therapy due to toxicity, unless approved by the medical monitor
    • c. Was not removed from carfilzomib therapy for progressive disease nor experienced progressive disease within 6 months after any prior carfilzomib therapy.

Key

Exclusion Criteria

1. Radiation therapy within 2 weeks prior to first dose; localized radiation therapy within 1 week prior to first dose
2. Immunotherapy/standard myeloma therapy within 2 weeks prior to first dose (except for antibody therapy, where 6 weeks are required, and alkylator therapy, where 3 weeks are required); prior stem cell transplant (SCT) therapy (autologous SCT within the prior 8 weeks; allogeneic SCT within the prior 16 weeks). Patients with prior allogeneic SCT should not have evidence of moderate-to-severe graft-versus-host disease (GvHD).
3. Plasmapheresis is not permitted at any time during the Screening period or while the subject is receiving study treatment. If a subject has started screening procedures requiring plasmapheresis, or is anticipated to require plasmapheresis during or after the Screening period, this patient will be considered ineligible and should not be enrolled.
4. Glucocorticoid therapy within 14 days prior to enrollment that exceeds a cumulative dose of 160 mg of dexamethasone or equivalent
5. Participation in an investigational therapeutic study within 3 weeks prior to first dose
6. Prior oprozomib exposure
7. Known hypersensitivity/toxicity or intolerance to dexamethasone
8. Major surgery within 3 weeks prior to first dose
9. Congestive heart failure ([CHF] New York Heart Association Class III to IV), symptomatic ischemia, conduction abnormalities uncontrolled by conventional intervention, or myocardial infarction within 6 months prior to first dose
10. Uncontrolled hypertension or uncontrolled diabetes
11. Active infection requiring systemic antibiotics, antivirals, or antifungals within 2 weeks prior to first dose
12. Known or suspected human immunodeficiency virus (HIV) infection or patients who are HIV seropositive
13. Active hepatitis A, B, or C infection
14. History of previous clinically significant GI bleed in the last 6 months prior to first dose
15. Significant neuropathy (Grade 3, Grade 4, or Grade 2 with pain) at the time of the first dose
16. Other malignancy within the past 3 years, with the exception of adequately treated basal cell carcinoma of the skin, squamous cell skin cancer, thyroid cancer, carcinoma in situ of the cervix, carcinoma in situ of the breast, prostate cancer of Gleason Score of 6 or less with stable prostate specific antigen levels, or cancer considered cured by surgical resection
17. Plasma cell leukemia
18. Female patients who are pregnant or nursing
19. Inability to swallow medication, inability or unwillingness to comply with the drug administration requirements, or GI condition that could interfere with the oral absorption or tolerance of treatment
20. Any contraindication to oral hydration (e.g., significant preexisting comorbidity or fluid restriction)
21. Any clinically significant psychiatric or medical condition that in the opinion of the investigator could increase patient risk or interfere with protocol adherence or a patient's ability to give informed consent.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Cohort 180 mg 5/14 Schedule (Phase 1b)	Dexamethasone	Oprozomib 180 mg treatment once daily for 5 consecutive days bimonthly (days 1, 2, 3, 4, and 5 of a 14-day cycle) with 20 mg dexamethasone once daily on days 1, 2, 8, and 9 (referred to as the 5/14 schedule). Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 210 mg 5/14 Schedule (Phase 1b)	Dexamethasone	Oprozomib 210 mg treatment once daily for 5 consecutive days bimonthly (days 1, 2, 3, 4, and 5 of a 14-day cycle) with 20 mg dexamethasone once daily on days 1, 2, 8, and 9 (referred to as the 5/14 schedule). Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason. This was the first cohort to enroll participants into the 5/14 schedule. The Cohort Safety Review Committee (CSRC) reviewed safety data and made dose adjustments for oprozomib in 30 mg increments for all cohorts.
Cohort 150/180 mg 5/14 Schedule (Phase 1b)	Dexamethasone	Oprozomib 150 mg once daily treatment for 5 consecutive days (days 1, 2, 3, 4, and 5 of a 14-day cycle) followed by a step-up in oprozomib once daily dose to 180 mg starting in cycle 2 and moving forward. Dexamethasone 20 mg once daily was administered on days 1, 2, 8, and 9 of each 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 210 mg 2/7 Schedule (Phase 1b)	Dexamethasone	Oprozomib 210 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason. This was the first cohort to enroll participants into the 2/7 schedule. The Cohort Safety Review Committee (CSRC) reviewed safety data and made dose adjustments for oprozomib in 30 mg increments for all cohorts.
Cohort 240 mg 2/7 Schedule (Phase 1b)	Dexamethasone	Oprozomib 240 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 270 mg 2/7 Schedule (Phase 1b)	Dexamethasone	Oprozomib 270 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 300 mg 2/7 Schedule (Phase 1b)	Dexamethasone	Oprozomib 300 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Phase 2 300 mg 2/7 Schedule	Dexamethasone	The Cohort Safety Review Committee (CSRC) determined this dose as the recommended phase 2 dose (RP2D). Oprozomib 300 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 330 mg 2/7 Schedule (Phase 1b)	Dexamethasone	Oprozomib 330 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 180 mg 5/14 Schedule (Phase 1b)	Oprozomib	Oprozomib 180 mg treatment once daily for 5 consecutive days bimonthly (days 1, 2, 3, 4, and 5 of a 14-day cycle) with 20 mg dexamethasone once daily on days 1, 2, 8, and 9 (referred to as the 5/14 schedule). Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 210 mg 5/14 Schedule (Phase 1b)	Oprozomib	Oprozomib 210 mg treatment once daily for 5 consecutive days bimonthly (days 1, 2, 3, 4, and 5 of a 14-day cycle) with 20 mg dexamethasone once daily on days 1, 2, 8, and 9 (referred to as the 5/14 schedule). Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason. This was the first cohort to enroll participants into the 5/14 schedule. The Cohort Safety Review Committee (CSRC) reviewed safety data and made dose adjustments for oprozomib in 30 mg increments for all cohorts.
Cohort 150/180 mg 5/14 Schedule (Phase 1b)	Oprozomib	Oprozomib 150 mg once daily treatment for 5 consecutive days (days 1, 2, 3, 4, and 5 of a 14-day cycle) followed by a step-up in oprozomib once daily dose to 180 mg starting in cycle 2 and moving forward. Dexamethasone 20 mg once daily was administered on days 1, 2, 8, and 9 of each 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 210 mg 2/7 Schedule (Phase 1b)	Oprozomib	Oprozomib 210 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason. This was the first cohort to enroll participants into the 2/7 schedule. The Cohort Safety Review Committee (CSRC) reviewed safety data and made dose adjustments for oprozomib in 30 mg increments for all cohorts.
Cohort 240 mg 2/7 Schedule (Phase 1b)	Oprozomib	Oprozomib 240 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 270 mg 2/7 Schedule (Phase 1b)	Oprozomib	Oprozomib 270 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 300 mg 2/7 Schedule (Phase 1b)	Oprozomib	Oprozomib 300 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Cohort 330 mg 2/7 Schedule (Phase 1b)	Oprozomib	Oprozomib 330 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.
Phase 2 300 mg 2/7 Schedule	Oprozomib	The Cohort Safety Review Committee (CSRC) determined this dose as the recommended phase 2 dose (RP2D). Oprozomib 300 mg once daily on Days 1, 2, 8, and 9 of a 14-day treatment cycle in combination with 20 mg dexamethasone once daily on Days 1, 2, 8, and 9 of a 14-day cycle. Treatment was administered in 14-day cycles until disease progression, unacceptable toxicity, or study treatment discontinuation for any reason.

Primary Outcome Measures

Name	Time	Method
Participants With Treatment-Emergent Adverse Events (TEAEs) During Phase 1b and 2	Day 1 up to Week 282	AE defined as any untoward medical occurrence in a clinical trial participant. Treatment-emergent adverse events were defined as adverse events that start on or after the first day of study treatment and within 30 days of the last day of study treatment. An adverse event that was present before the first administration of study treatment and subsequently worsens in severity during treatment was also considered to be treatment-emergent.; Serious AE defined as AE that is fatal, life threatening, requires in-patient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect or other significant medical hazard. Severity of AEs assessed according to Common Terminology Criteria for Adverse Events (CTCAE, v4.03) based on the general guideline: Grade 1: Mild; Grade 2: Moderate; Grade 3: Severe; Grade 4: Life-threatening or disabling; Grade 5: Death related to AE.; IP=investigational product
Participants With Dose-Limiting Toxicities (DLT)	Day 1 to Day 14 (Cycle 1) for continous dosing and Day 15 to Day 28 (Cycle 2) for step-up dosing	Toxicities (graded per the Common Terminology Criteria for Adverse Events v 4.03) were considered DLTs if judged by the investigator to be related to oprozomib and occurred in the first 14 days of treatment, with treatment at the dose to be studied (i.e., Cycle 1 for continuous dosing or Cycle 2 for step-up dosing). A DLT was categorized as nonhematologic or hematologic. Examples include: * Any ≥ Grade 3 nonhematologic AE, with exceptions or qualifications such as Grade 3 nausea, vomiting, diarrhea, or constipation were considered a DLT only if lasting for \> 7 days despite optimal supportive care; * Grade 3 fatigue lasting \> 14 days; * Grade 4 neutropenia: absolute neutrophil count (ANC) \< 500 cells/mcL lasting ≥ 7 days; * Febrile neutropenia: Any single temperature ≥ 38.3°C or a sustained temperature of ≥ 38.0°C for over 1 hour with ≥ Grade 3 neutropenia (ANC \< 1000 cells/mcL); * Grade 3/4 thrombocytopenia; * Others specified in the protocol
Best Overall Response in Phase 2 as Assessed by Investigator	Screening: Day 14 to Day -1; During study: Day 1 up to 13.16 months	Disease response and progression were determined using the International Myeloma Working Group-Uniform Response Criteria (IMWG-URC), except for minimal response (MR) and near complete response (nCR) which was based on the European Group for Blood and Marrow Transplantation (EBMT) criteria. Evaluations reported were assessed by the investigator for participants in Phase 2.
Percentage of Participants Who Achieved an Overall Response As Assessed by Investigator During Phase 2	Screening: Day 14 to Day -1; During study: Day 1 up to 13.16 months	The overall response rate (ORR) was defined as the percentage of participants with the best overall response of stringent complete response (sCR), complete response (CR), near complete response (nCR), very good partial response (VGPR), and partial response (PR) as defined by the International Myeloma Working Group-Uniform Response Criteria (IMWG-URC) and modified European Group for Blood and Marrow Transplantation (EBMT) criteria.
Participants With Treatment-Related, Treatment-Emergent Adverse Events (TEAEs) During Phase 1b and 2	Day 1 up to Week 282	AE defined as any untoward medical occurrence in a clinical trial participant. TEAEs were defined as AEs that start on or after the first day of study treatment and within 30 days of the last day of study treatment. An AE that was present before the first administration of study treatment and subsequently worsens in severity during treatment was also considered a TEAE.; Investigator assessed AEs for relatedness to study drug. Serious AE defined as AE that is fatal, life threatening, requires in-patient hospitalization or prolongation of existing hospitalization, results in persistent or significant disability/incapacity, is a congenital anomaly/birth defect or other significant medical hazard. Severity of AEs assessed according to Common Terminology Criteria for Adverse Events (CTCAE, v4.03) based on the general guideline: Grade 1: Mild; Grade 2: Moderate; Grade 3: Severe; Grade 4: Life-threatening or disabling; Grade 5: Death related to AE.; IP=investigational product

Secondary Outcome Measures

Name	Time	Method
Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Area Under the Curve From Time 0 to Time Infinity (AUCinf) on Cycle 1, Day 1	Day 1	The area under the plasma concentration-curve from time 0 to time infinity (AUCinf) was estimated using the linear trapezoidal method; PK samples obtained on the following schedule: Phase 1b Continuous Dosing, Cycles 1 and 2: Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 8 hours post-dose plus pre-dose on Day 2 Phase 1b Step-up Dosing, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2 Phase 2, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2
Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Terminal Half-Life (t1/2,z) on Cycle 1, Day 1	Day 1	PK samples obtained on the following schedule: Phase 1b Continuous Dosing, Cycles 1 and 2: Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 8 hours post-dose plus pre-dose on Day 2 Phase 1b Step-up Dosing, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2 Phase 2, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2
Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Area Under the Curve at the Last Measurable Time Point (AUClast) on Cycle 1, Day 1	Day 1	The area under the plasma concentration-time curve from time 0 to the time of the last quantifiable concentration (AUClast) was estimated using the linear trapezoidal method.; PK samples obtained on the following schedule: Phase 1b Continuous Dosing, Cycles 1 and 2: Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 8 hours post-dose plus pre-dose on Day 2 Phase 1b Step-up Dosing, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2 Phase 2, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2
Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Time to Maximum Serum Concentration (Tmax) on Cycle 1, Day 1	Day 1	PK samples obtained on the following schedule: Phase 1b Continuous Dosing, Cycles 1 and 2: Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 8 hours post-dose plus pre-dose on Day 2 Phase 1b Step-up Dosing, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2 Phase 2, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2
Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Maximum Serum Concentration (Cmax) on Cycle 1, Day 1	Day 1	PK samples obtained on the following schedule: Phase 1b Continuous Dosing, Cycles 1 and 2: Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 8 hours post-dose plus pre-dose on Day 2 Phase 1b Step-up Dosing, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2 Phase 2, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2
Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Apparent Volume of Distribution After Oral Administration (Vz/F) on Cycle 1, Day 1	Day 1	The apparent volume of distribution after oral administration (Vz/F) calculated as the dose divided by AUCinf times ƒz, where ƒz was the first-order terminal rate constant estimated via linear regression of the terminal log-linear phase.; PK samples obtained on the following schedule: Phase 1b Continuous Dosing, Cycles 1 and 2: Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 8 hours post-dose plus pre-dose on Day 2 Phase 1b Step-up Dosing, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2 Phase 2, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2
Percentage of Participants Who Achieved a Clinical Benefit Response As Assessed by Investigator During Phase 2	Screening: Day 14 to Day -1; During study: Day 1 up to 13.16 months	The clinical benefit rate (CBR) was defined as Overall Response Rate (ORR) plus Minimal Response (MR) as defined by the European Group for Blood and Marrow Transplantation (EBMT) criteria.
Kaplan-Meier Estimate for Time to Progression (TTP) as Assessed by Investigator During Phase 2	Day 1 up to 14.1 months	Time to progression (TTP) was defined as the number of months between the start of treatment to the first documentation of disease progression. Disease progression was determined using IMWG-URC as assessed by the investigator. The same censoring rules, except for death, as in analysis of PFS were applied in the calculation of TTP.; Participants who died prior to progressive disease were censored at the date of last evaluable response assessment.
Kaplan-Meier Estimates for Progression-free Survival (PFS) as Assessed by Investigator During Phase 2	Day 1 up to 14.1 months	Progression-free survival (PFS) was defined as number of months between start of treatment and first evidence of documented disease progression or death (due to any cause), whichever occurs first. Disease progression was determined using IMWG-URC per investigator. The duration of PFS was right-censored for participants who met 1 of the following conditions: * 1) starting a new anticancer therapy before documentation of disease progression or death; * 2) death or disease progression immediately after more than 1 consecutively missed disease assessment visit or; * 3) alive without documentation of disease progression before the data cutoff date.; 95% CIs for medians were estimated using the method by Klein and Moeschberger (1997) with log-log transformation.
Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Apparent Drug Clearance After Oral Administration (CL/F) on Cycle 1, Day 1	Day 1	The apparent drug clearance after oral administration (CL/F) was calculated as the dose divided by AUCinf.; PK samples obtained on the following schedule: Phase 1b Continuous Dosing, Cycles 1 and 2: Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 8 hours post-dose plus pre-dose on Day 2 Phase 1b Step-up Dosing, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2 Phase 2, Day 1: pre-dose, post-dose at 15 and 30 minutes, 1, 2, 4, 6, and 7 hours post-dose plus pre-dose on Day 2
Kaplan-Meier Estimates for Duration of Response (DOR) as Assessed by Investigator During Phase 2	Day 1 up to 13.16 months	Duration of response was defined as the time from first evidence of partial response (PR) or better (i.e. best overall response) to confirmation of disease progression or death due to any cause. Durations were calculated for responders only. Medians and percentiles were estimated using the Kaplan-Meier method. 95% confidence intervals for medians and percentiles were estimated using the method by Klein and Moeschberger (1997) with log-log transformation.

Trial Locations

Locations (13)

CHRU, Hopital Huriez - Department of Hematology; 🇫🇷 Lille CEDEX, France

Gabrail Cancer Center Research; 🇺🇸 Canton, Ohio, United States

CHU Hotel Dieu - Service d'Hematologie Clinique; 🇫🇷 NANTES Cedex, France

CHU de NANCY - Hopital de BRABOlS; 🇫🇷 Vandoeuvre Les Nancy, France

USC/Norris Comprehensive Cancer Center; 🇺🇸 Los Angeles, California, United States

H. Lee Moffitt Cancer Center & Research Institute; 🇺🇸 Tampa, Florida, United States

University of Kansas Cancer Center and Medical Pavilion; 🇺🇸 Westwood, Kansas, United States

Center for Cancer and Blood Disorders; 🇺🇸 Bethesda, Maryland, United States

Froedtert Hospital and the Medical College of Wisconsin; 🇺🇸 Milwaukee, Wisconsin, United States

Karmanos Cancer Institute; 🇺🇸 Detroit, Michigan, United States

Dana-Farber Cancer Institute; 🇺🇸 Boston, Massachusetts, United States

Massachusetts General Hospital; 🇺🇸 Boston, Massachusetts, United States

Division of Hematology/ Oncology, UNC at Chapel Hill; 🇺🇸 Chapel Hill, North Carolina, United States