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

Study Overview
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Brief Summary
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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
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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).

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

Conditions
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Multiple Myeloma

Intervention / Treatment
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* Drug: Oprozomib
* Drug: Dexamethasone


Participation Criteria
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Eligibility Criteria
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Key Inclusion Criteria: 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 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. Males and females ≥ 18 years of age Eastern Cooperative Oncology Group Performance Status (ECOG PS) 0-2 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 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. 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. Uric acid, if elevated, must be corrected to within laboratory normal range before dosing. Patients must sign a written informed consent form in accordance with federal, local, and institutional guidelines. 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. 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: Radiation therapy within 2 weeks prior to first dose; localized radiation therapy within 1 week prior to first dose 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). 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. Glucocorticoid therapy within 14 days prior to enrollment that exceeds a cumulative dose of 160 mg of dexamethasone or equivalent Participation in an investigational therapeutic study within 3 weeks prior to first dose Prior oprozomib exposure Known hypersensitivity/toxicity or intolerance to dexamethasone Major surgery within 3 weeks prior to first dose 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 Uncontrolled hypertension or uncontrolled diabetes Active infection requiring systemic antibiotics, antivirals, or antifungals within 2 weeks prior to first dose Known or suspected human immunodeficiency virus (HIV) infection or patients who are HIV seropositive Active hepatitis A, B, or C infection History of previous clinically significant GI bleed in the last 6 months prior to first dose Significant neuropathy (Grade 3, Grade 4, or Grade 2 with pain) at the time of the first dose 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 Plasma cell leukemia Female patients who are pregnant or nursing 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 Any contraindication to oral hydration (e.g., significant preexisting comorbidity or fluid restriction) 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.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Non-Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Cohort 180 mg 5/14 Schedule (Phase 1b)<br>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. | Drug: Oprozomib<br>* Oprozomib tablets were supplied containing 60, 90, or 120 mg of oprozomib. Oprozomib extended release tablets were supplied containing 150, 180, 210, 240, or 270 mg of oprozomib. Both formulations were administered in a single dose on dosing days. The tablet formulation required multiple tablets to reach each dose on dosing days.<br>* Other names: oprozomib ER;Drug: Dexamethasone<br>* Dexamethasone was administered as 20 mg tablets in strengths of 4 and 6 mg taken orally. If a participant could not tolerate tablets or tablets were unavailable, 20 mg administered intravenously was substituted.<br>|
| Experimental: Cohort 210 mg 5/14 Schedule (Phase 1b)<br>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. | Drug: Oprozomib<br>* Oprozomib tablets were supplied containing 60, 90, or 120 mg of oprozomib. Oprozomib extended release tablets were supplied containing 150, 180, 210, 240, or 270 mg of oprozomib. Both formulations were administered in a single dose on dosing days. The tablet formulation required multiple tablets to reach each dose on dosing days.<br>* Other names: oprozomib ER;Drug: Dexamethasone<br>* Dexamethasone was administered as 20 mg tablets in strengths of 4 and 6 mg taken orally. If a participant could not tolerate tablets or tablets were unavailable, 20 mg administered intravenously was substituted.<br>|
| Experimental: Cohort 150/180 mg 5/14 Schedule (Phase 1b)<br>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. | Drug: Oprozomib<br>* Oprozomib tablets were supplied containing 60, 90, or 120 mg of oprozomib. Oprozomib extended release tablets were supplied containing 150, 180, 210, 240, or 270 mg of oprozomib. Both formulations were administered in a single dose on dosing days. The tablet formulation required multiple tablets to reach each dose on dosing days.<br>* Other names: oprozomib ER;Drug: Dexamethasone<br>* Dexamethasone was administered as 20 mg tablets in strengths of 4 and 6 mg taken orally. If a participant could not tolerate tablets or tablets were unavailable, 20 mg administered intravenously was substituted.<br>|
| Experimental: Cohort 210 mg 2/7 Schedule (Phase 1b)<br>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. | Drug: Oprozomib<br>* Oprozomib tablets were supplied containing 60, 90, or 120 mg of oprozomib. Oprozomib extended release tablets were supplied containing 150, 180, 210, 240, or 270 mg of oprozomib. Both formulations were administered in a single dose on dosing days. The tablet formulation required multiple tablets to reach each dose on dosing days.<br>* Other names: oprozomib ER;Drug: Dexamethasone<br>* Dexamethasone was administered as 20 mg tablets in strengths of 4 and 6 mg taken orally. If a participant could not tolerate tablets or tablets were unavailable, 20 mg administered intravenously was substituted.<br>|
| Experimental: Cohort 240 mg 2/7 Schedule (Phase 1b)<br>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. | Drug: Oprozomib<br>* Oprozomib tablets were supplied containing 60, 90, or 120 mg of oprozomib. Oprozomib extended release tablets were supplied containing 150, 180, 210, 240, or 270 mg of oprozomib. Both formulations were administered in a single dose on dosing days. The tablet formulation required multiple tablets to reach each dose on dosing days.<br>* Other names: oprozomib ER;Drug: Dexamethasone<br>* Dexamethasone was administered as 20 mg tablets in strengths of 4 and 6 mg taken orally. If a participant could not tolerate tablets or tablets were unavailable, 20 mg administered intravenously was substituted.<br>|
| Experimental: Cohort 270 mg 2/7 Schedule (Phase 1b)<br>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. | Drug: Oprozomib<br>* Oprozomib tablets were supplied containing 60, 90, or 120 mg of oprozomib. Oprozomib extended release tablets were supplied containing 150, 180, 210, 240, or 270 mg of oprozomib. Both formulations were administered in a single dose on dosing days. The tablet formulation required multiple tablets to reach each dose on dosing days.<br>* Other names: oprozomib ER;Drug: Dexamethasone<br>* Dexamethasone was administered as 20 mg tablets in strengths of 4 and 6 mg taken orally. If a participant could not tolerate tablets or tablets were unavailable, 20 mg administered intravenously was substituted.<br>|
| Experimental: Cohort 300 mg 2/7 Schedule (Phase 1b)<br>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. | Drug: Oprozomib<br>* Oprozomib tablets were supplied containing 60, 90, or 120 mg of oprozomib. Oprozomib extended release tablets were supplied containing 150, 180, 210, 240, or 270 mg of oprozomib. Both formulations were administered in a single dose on dosing days. The tablet formulation required multiple tablets to reach each dose on dosing days.<br>* Other names: oprozomib ER;Drug: Dexamethasone<br>* Dexamethasone was administered as 20 mg tablets in strengths of 4 and 6 mg taken orally. If a participant could not tolerate tablets or tablets were unavailable, 20 mg administered intravenously was substituted.<br>|
| Experimental: Cohort 330 mg 2/7 Schedule (Phase 1b)<br>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. | Drug: Oprozomib<br>* Oprozomib tablets were supplied containing 60, 90, or 120 mg of oprozomib. Oprozomib extended release tablets were supplied containing 150, 180, 210, 240, or 270 mg of oprozomib. Both formulations were administered in a single dose on dosing days. The tablet formulation required multiple tablets to reach each dose on dosing days.<br>* Other names: oprozomib ER;Drug: Dexamethasone<br>* Dexamethasone was administered as 20 mg tablets in strengths of 4 and 6 mg taken orally. If a participant could not tolerate tablets or tablets were unavailable, 20 mg administered intravenously was substituted.<br>|
| Experimental: Phase 2 300 mg 2/7 Schedule<br>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. | Drug: Oprozomib<br>* Oprozomib tablets were supplied containing 60, 90, or 120 mg of oprozomib. Oprozomib extended release tablets were supplied containing 150, 180, 210, 240, or 270 mg of oprozomib. Both formulations were administered in a single dose on dosing days. The tablet formulation required multiple tablets to reach each dose on dosing days.<br>* Other names: oprozomib ER;Drug: Dexamethasone<br>* Dexamethasone was administered as 20 mg tablets in strengths of 4 and 6 mg taken orally. If a participant could not tolerate tablets or tablets were unavailable, 20 mg administered intravenously was substituted.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Participants With Dose-Limiting Toxicities (DLT) | 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 | Day 1 to Day 14 (Cycle 1) for continous dosing and Day 15 to Day 28 (Cycle 2) for step-up dosing | 
| Participants With Treatment-Emergent Adverse Events (TEAEs) During Phase 1b and 2 | 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 | Day 1 up to Week 282 | 
| Participants With Treatment-Related, Treatment-Emergent Adverse Events (TEAEs) During Phase 1b and 2 | 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 | Day 1 up to Week 282 | 
| Best Overall Response in Phase 2 as Assessed by Investigator | 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. | Screening: Day 14 to Day -1; During study: Day 1 up to 13.16 months | 
| Percentage of Participants Who Achieved an Overall Response As Assessed by Investigator During Phase 2 | 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. | Screening: Day 14 to Day -1; During study: Day 1 up to 13.16 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Time to Maximum Serum Concentration (Tmax) on Cycle 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 | Day 1 | 
| Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Maximum Serum Concentration (Cmax) on Cycle 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 | Day 1 | 
| 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 | 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 | Day 1 | 
| 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 | 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 | Day 1 | 
| Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Terminal Half-Life (t1/2,z) on Cycle 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 | Day 1 | 
| Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Apparent Drug Clearance After Oral Administration (CL/F) on Cycle 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 | Day 1 | 
| Pharmacokinetic (PK) Parameter for Oprozomib, Tablet and ER Formulation: Apparent Volume of Distribution After Oral Administration (Vz/F) on Cycle 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 | Day 1 | 
| Percentage of Participants Who Achieved a Clinical Benefit Response As Assessed by Investigator During Phase 2 | 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. | Screening: Day 14 to Day -1; During study: Day 1 up to 13.16 months | 
| Kaplan-Meier Estimates for Duration of Response (DOR) as Assessed by Investigator During Phase 2 | 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. | Day 1 up to 13.16 months | 
| Kaplan-Meier Estimates for Progression-free Survival (PFS) as Assessed by Investigator During Phase 2 | 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. | Day 1 up to 14.1 months | 
| Kaplan-Meier Estimate for Time to Progression (TTP) as Assessed by Investigator During Phase 2 | 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. | Day 1 up to 14.1 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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multiple myeloma, oprozomib, OPZ, ONX 0912, Onyx, proteasome inhibitor, oprozomib tablets