The purpose of this study is to test the safety of a combination of study drugs called selinexor (KPT-330) and ixazomib (MLN9708) with a low dose of dexamethasone. This study tests different doses of the study drug, selinexor to see which dose is safer in people. Depending on which group (dose level) you are in, the dose of selinexor will vary, but the ixazomib and dexamethasone doses will be the same among the groups.
The following criteria is a partial list of reasons why patients may or may not be eligible to participate in this clinical trial. Further evaluation with a medical professional will be required to determine full eligibility.
The following criteria is provided for health care professionals.