Clinical Trial of Ublituximab and Umbralisib With CHOP (U2-CHOP) Followed by U2 Maintenance (U2-CHOP-U2) in Previously Untreated Mantle Cell Lymphoma (MCL)

This is a single arm, multi-center, open label Phase Ib/II trial in adult patients with newly diagnosed Mantle Cell Lymphoma (MCL)(Stage II-IV). The Diagnosis of MCL (Stage II, III, IV) is supported by histology and over expression of cyclin D1 or by FISH (fluorescent in situ hybridization). In the proposed study, the primary endpoint is to estimate the biological response rate of the combination of Umbralisib at dose 800 mg with Ublituximab (900mg)-Cyclophosphamide, Doxorubicin, Vincristine and Prednisone (CHOP), but a phase Ib portion with dose de-escalation at two does level (800 and 600 mg) will be built in to further confirm its safety and tolerability. Treatment will be administered on an outpatient basis in 3-week (21 day) cycles. Once Umbralisib dose is defined in phase Ib, the study will expand to phase II portion after SMC/DSMB (Safety monitoring committee/Data Safety Monitoring Committee) agreement.