TG Therapeutics Announces FDA Acceptance of New Drug Application for Umbralisib as a Treatment for Patients with Previously Treated Marginal Zone Lymphoma and Follicular Lymphoma

NEW YORK, Aug. 13, 2020 (GLOBE NEWSWIRE) -- TG Therapeutics, Inc. (NASDAQ: TGTX), today announced that the U.S. Food and Drug Administration (FDA) has accepted the Company’s New Drug Application (NDA) for umbralisib, the Company’s investigational once-daily, oral, dual inhibitor of PI3K-delta and CK1-epsilon, as a treatment for patients with previously treated marginal zone lymphoma (MZL) who have received at least one prior anti-CD20 based regimen and follicular lymphoma (FL) who have received at least two prior systemic therapies. The MZL indication, under Breakthrough Therapy Designation (BTD), has been accepted for Priority Review and has a Prescription Drug User Fee Act (PDUFA) goal date of February 15, 2021. The FL indication has been accepted for standard review with a PDUFA goal date of June 15, 2021. The FDA also notified the Company that it is not currently planning to hold an advisory committee meeting to discuss this application.

Michael S. Weiss, Executive Chairman and Chief Executive Officer of TG Therapeutics stated, "We are extremely pleased with the FDA’s acceptance of our first NDA submission and look forward to working with the FDA during the review process. This is a significant achievement in our path towards accomplishing our goal of developing novel treatments for patients with B-cell diseases.” Mr. Weiss continued, “If approved, we believe umbralisib could become an important treatment option for patients with previously treated MZL and FL. We look forward to presenting the data from the UNITY-NHL trial that supported this NDA submission by year end.”

The NDA for umbralisib was based primarily on data from the umbralisib monotherapy MZL and FL cohorts of the UNITY-NHL Phase 2b trial evaluating patients with relapsed/refractory MZL or FL. The Company has previously announced that each cohort met its primary endpoint of overall response rate (ORR), meeting the Company’s target guidance of 40-50% ORR, as confirmed by an Independent Review Committee (IRC). The FDA has also previously granted umbralisib Breakthrough Therapy Designation (BTD) for MZL and orphan drug designation (ODD) for MZL and FL.

ABOUT THE UNITY-NHL PHASE 2b STUDY—MZL & FL COHORTS 
The UNITY- NHL trial is a global multicenter, open-label Phase 2b trial.

The MZL cohort was designed to evaluate the safety and efficacy of single agent umbralisib in patients with MZL who have received at least one prior anti-CD20 regimen. In February of 2019, the Company announced that the primary endpoint of overall response rate (ORR) as determined by Independent Review Committee (IRC) was met for all treated MZL patients. The results met the Company’s target guidance of 40-50% ORR. Interim safety and efficacy data from the MZL cohort were presented in oral presentations in 2019 at the American Association for Cancer Research (AACR) annual meeting, the American Society of Clinical Oncology (ASCO) annual meeting and the International Conference on Malignant Lymphoma (ICML).