A Study of Ixazomib Administered in Combination With Lenalidomide and Low-Dose Dexamethasone in Patients With Newly Diagnosed Multiple Myeloma

An Adverse Event (AE) is defined as any untoward medical occurrence in a clinical investigation participant administered a drug; it does not necessarily have to have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (example, a clinically significant abnormal laboratory finding), symptom, or disease temporally associated with the use of a drug, whether or not it is considered related to the drug. A serious adverse event (SAE) is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; or congenital anomaly; or a medically important event.

ORR was defined as the percentage of participants with Complete (CR) + Very Good Partial Response (VGPR) assessed by the investigatory using International Myeloma Working Group (IMWG) Criteria. CR=Negative immunofixation on the serum and urine and; disappearance of any soft tissue plasmacytomas and; < 5% plasma cells in bone marrow. VGPR=Serum and urine M-protein detectable by immunofixation but not on electrophoresis or; 90% or greater reduction in serum M-protein plus urine M-protein level < 100 mg per 24 hours.

RP2D will be determined based on number and type of adverse event and serious adverse events, assessments of clinical laboratory values, neurotoxicity grading, and treatment discontinuation.

MTD of ixazomib will be determined by assessing adverse events and serious adverse events, clinical laboratory values, neurotoxicity grading, and vital sign measurements.

An Adverse Event (AE) is defined as any untoward medical occurrence in a clinical investigation participant administered a drug; it does not necessarily have to have a causal relationship with this treatment. An AE can therefore be any unfavorable and unintended sign (example, a clinically significant abnormal laboratory finding), symptom, or disease temporally associated with the use of a drug, whether or not it is considered related to the drug. A serious adverse event (SAE) is an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; or congenital anomaly; or a medically important event.

Cmax: Maximum Observed Plasma Concentration (Cmax) is the peak plasma concentration of ixazomib obtained directly from the plasma concentration-time curve.

Tmax: Time to reach the first maximum observed plasma concentration (Cmax), equal to time (hours) to Cmax, obtained directly from the plasma concentration-time curve.

AUC(0-168) is a measure of the area under the plasma concentration-time curve from time 0 to 168 hours postdose for Ixazomib.

The accumulation ratio (Rac) was estimated as the ratio of AUC(0-168) on Day 15 to the AUC(0-168) on Day 1. AUC(0-168) is the area under the plasma concentration-time curve from time 0 to 168 hours postdose for ixazomib.

Emax is the maximum observed inhibition of whole blood 20S proteasome. The pharmacodynamics 20S Proteasome samples were collected and the assays were performed; however, concerns about the third-party laboratory's performance of the blood 20S proteasome activity assay were identified that precluded the ability to confirm the accuracy of the data so no data is reported.

TEmax is the time to the maximum observed inhibition of whole blood 20S proteasome. The pharmacodynamics 20S Proteasome samples were collected and the assays were performed; however, concerns about the third-party laboratory's performance of the blood 20S proteasome activity assay were identified that precluded the ability to confirm the accuracy of the data so no data is reported.

TTP was measured as the time in months from the first dose of study treatment to the date of the first documented progressive disease (PD).

OS was measured as the time in months from the first dose of study treatment to the date of death + 1 day.

ORR was defined as the percentage of participants with CR, VGPR and Partial Response (PR) assessed by the investigator using IMWG criteria. CR=Negative immunofixation on the serum and urine + Disappearance of any soft tissue plasmacytomas and < 5% plasma cells in bone marrow. PR=50% reduction of serum M-protein and reduction in 24-hour urinary M-protein by 90% or to < 200 mg per 24 hours. VGPR= Serum and urine M-protein detectable by immunofixation but not on electrophoresis or 90% or greater reduction in serum M-protein plus urine M-protein level < 100 mg per 24 hours.

Response was assessed by the investigator using International Myeloma Working Group (IMWG) Criteria. CR is defined as negative immunofixation on the serum and urine and; disappearance of any soft tissue plasmacytomas and; < 5% plasma cells in bone marrow. VGPR is defined as Serum and urine M-protein detectable by immunofixation but not on electrophoresis or 90% or greater reduction in serum M-protein plus urine M-protein level < 100 mg per 24 hours.

Response was assessed by the investigator using International Myeloma Working Group (IMWG) Criteria. CR=Negative immunofixation on the serum and urine + Disappearance of any soft tissue plasmacytomas and < 5% plasma cells in bone marrow. sCR= CR + Normal free light chain (FLC) ratio and Absence of clonal cells in bone marrow. PR=≥50% reduction of serum M-protein and reduction in 24-hour urinary M-protein by ≥90% or to < 200 mg per 24 hours. VGPR= Serum and urine M-protein detectable by immunofixation but not on electrophoresis or 90% or greater reduction in serum M-protein plus urine M-protein level < 100 mg per 24 hours. nCR=Positive immunofixation analysis of serum or urine as the only evidence of disease. Disappearance of any soft tissue plasmacytomas and < 5% plasma cells in bone marrow. MR=25% to 49% reduction in serum paraprotein and 50% to 89% reduction in urine light chain excretion for 6 weeks.

Time to Best Response was measured as the time in months from the first dose of study treatment to the date of first documented documentation of a confirmed response of partial response (PR) or better.

DOR was measured as the time in months from the date of first documentation of a confirmed response (CR + PR+ VGPR) to the date of the first documented disease progression (PD). Response was assessed by the investigator using International Myeloma Working Group (IMWG) Criteria. CR=negative immunofixation on the serum and urine and disappearance of any soft tissue plasmacytomas and < 5% plasma cells in bone marrow. VGPR=Serum and urine M-protein detectable by immunofixation but not on electrophoresis or 90% or greater reduction in serum M-protein plus urine M-protein level < 100 mg per 24 hours.

PFS was measured as the time in months from the first dose of study treatment to the date of the first documented PD or death.

1-year survival rate is defined as the percentage of participants still alive at year after the first dose of stud drug.