A Study of IXAZOMIB in Adult Patients With Lymphoma

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 treatment-emergent adverse event (TEAE) is defined as an adverse event with an onset that occurs after receiving study 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.

The number of participants with any markedly abnormal standard safety laboratory values collected throughout study. Hematology, clinical chemistry and urinalysis were performed. TEAEs related to laboratory assessment observed at any time-points were reported under 3 system organ classes: blood and lymphatic system disorders, metabolism and nutrition disorders, and investigations.

Vital signs included body temperature, weight, systolic and diastolic blood pressure and heart rate.

The MTD was defined as the highest dose of ixazomib that generated dose limiting toxicity (DLT) during Cycle 1 in 0 of 3 or 1 of 6 participants. DLT defined as any of the following considered possibly related to therapy by investigator: Grade 4 neutropenia (absolute neutrophil count [ANC] <500 cell per cubic millimeter [cells/mm^3]) for >7 days; Grade 3 neutropenia with fever or infection; Grade 4 thrombocytopenia for >7 days; platelet count <25,000 cells/mm^3; Grade 3 thrombocytopenia with clinically significant bleeding; platelet count <10,000/mm^3; Grade 2 peripheral neuropathy with pain or Grade 3 peripheral neuropathy; >=Grade 3 nausea/emesis, diarrhea controlled by maximal supportive therapy; Grade 3 QTc prolongation>500 millisecond (msec);any >=Grade 3 nonhematologic toxicity except arthralgia/myalgia; <1 week fatigue; delay in the initiation of the subsequent therapy cycle by >=7 days ; other Grade 2 ixazomib-related nonhematologic toxicities requiring therapy discontinuation.

The RP2D of Ixazomib was determined in Part 1 (dose escalation) on the basis of the totality of safety, tolerability, pharmacokinetics (PK), pharmacodynamic and preliminary efficacy data observed in Cycles 1 and 2 and beyond.

C0 is the plasma drug concentration at time zero following bolus intravenous injection, obtained 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

Terminal phase elimination half-life (T1/2) is the time required for half of the drug to be eliminated from the plasma.

Rac was estimated as the ratio of AUC (0-168) on Day 15 and 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.

Ae (0-4) is the total amount of drug excreted in the urine from 0 to 4 hours postdose.

Fe (0-4) is the fraction of the dose excreted unchanged in the urine from 0 to 4 hours postdose, calculated as percentage of the exact dose administered.

CLr is the volume of plasma from which the drug is completely removed by the kidney in a given amount of time, calculated as the amount of drug excreted in the urine divided by the area under the plasma concentration-time curve, expressed in liter per hour (L/hr).

Emax is the maximum inhibition of 20S proteasome activity in whole blood.

TEmax: Time to reach the maximum observed effect (Emax), equal to time (hours) to Emax.

Overall best response is the best response observed for a participant during the study based on International Working Group (IWG) Response Criteria for malignant lymphoma. Complete response (CR) as per IWG is complete disappearance of all detectable clinical evidence of disease and disease-related symptoms if present before therapy. Partial response (PR) is a minimum of 50% decrease in sum of the product of the diameters (SPD) of up to 6 of the largest dominant nodes or nodal masses and no increase in the size of other nodes. Stable disease (SD) is when a participant fails to attain the criteria needed for a CR or PR, but does not fulfill those for PD. PD is any new lesion or increase by >50% of previously involved sites from nadir.