This is an open-label, Phase I/II study of carfilzomib, ruxolitinib, and low-dose dexamethasone for carfilzomib-refractory multiple myeloma. Phase I is designed to evaluate overall maximum tolerated dose (MTD) of ruxolitinib in combination with carfilzomib and dexamethasone in the following cohorts: Cohort 1) 5mg ruxolitinib, Cohort 2) 10mg ruxolitinib, Cohort 3) 15mg ruxolitinib. Phase II is designed to evaluate 4-month progression-free survival (PFS) in the following cohorts: Cohort A) non-responders to Phase I regimen, Cohort B) responders to Phase I regimen. Up to 18 evaluable subjects will be enrolled in Phase I over approximately 12 months. An additional 30 evaluable subjects will be enrolled in Phase II over 24 months.
The primary objective of Phase I is to establish the maximum tolerated dose (MTD) of ruxolitinib in combination with carfilzomib and dexamethasone. The primary objective of phase II is to evaluate progression-free survival (PFS) at 4 months in multiple myeloma subjects who receive the combination treatment carfilzomib, dexamethasone, and ruxolitinib.