100% ORR in CLL patients treated with 300 mg QD of TG-1701 monotherapy (n=19)

Triple combination of ublituximab and UKONIQ (U2) + TG-1701 cohort (n=19) resulted in 79% ORR, with 21% CR rate, including 100% ORR in patients WM, CLL, MZL, MCL, and DLBCL (n=11)

NEW YORK, June 04, 2021 (GLOBE NEWSWIRE) -- TG Therapeutics, Inc. (NASDAQ: TGTX), today announced data from TG-1701, the Company’s investigational once-daily, oral BTK inhibitor, as a monotherapy and as a triple therapy in combination with ublituximab, the Company’s novel glycoengineered anti-CD20 monoclonal antibody, and UKONIQ® (umbralisib), the Company’s once-daily, inhibitor of PI3K-delta and CK1-epsilon in patients with front line or relapsed/refractory non-Hodgkin’s lymphoma (NHL) and chronic lymphocytic leukemia (CLL). Data from this trial were made available on demand this morning during the American Society of Clinical Oncology (ASCO) Annual Meeting. Presentation highlights are included below.

Michael S. Weiss, the Company’s Executive Chairman and Chief Executive Officer, stated, “We are pleased to see that with additional patients and longer follow-up, TG-1701, our BTK inhibitor, continues to show encouraging clinical activity paired with what appears to be a tolerable safety profile, especially in the triple combination with U2. It is also exciting to see some early complete responses in patients treated with the triple therapy. We look forward to continuing to enroll on this trial and presenting additional data.”

PRESENTATION HIGHLIGHTS: Poster Presentation Title:  TG-1701, A Selective Bruton Tyrosine Kinase (BTK) Inhibitor, as Monotherapy and in Combination with Ublituximab and Umbralisib (U2) in Chronic Lymphocytic Leukemia (CLL) and Lymphoma

• A total of 125 patients with R/R CLL or B-cell lymphoma have been treated with TG-1701, with patients receiving monotherapy in the dose-escalation cohort (n=25), 200 mg in a dose-expansion cohort (n=61), 300 mg in a CLL dose-expansion cohort (n=20), or TG-1701 in combination with U2 in the dose escalation cohort (n=19).
• TG-1701 monotherapy was well tolerated and the maximum tolerated dose was not reached up to 400 mg QD.
• Adverse Events (AEs) of special interest in patients treated with 200 mg and 300 mg QD of TG-1701 (n=81), included Grade 3 hypertension (4.9%), atrial fibrillation (1.2%), and no instances of major bleeding observed. Grade 3 AEs occurring in ≥10% of patients treated with U2+1701 included diarrhea (11%), neutropenia (11%), ALT increase (16%), and AST increase (16%), and Grade 4 AEs occurring in ≥10% of patients treated with U2+1701 included neutropenia (11%).
• At a median follow up of 12.2 months in the 200 mg QD monotherapy expansion cohorts, overall response rates (ORR) were: 95% (19/20) in CLL, 65% (13/20) in mantle cell lymphoma (MCL), and 95% (19/20) in Waldenstrom macroglobulinemia (WM).
• 100% ORR observed at a median follow up of 8.6 months in the 300 mg CLL monotherapy cohort (n=19).
• At a median follow up of 15.6 months, the 1701+U2 dose escalation (using doses of 100mg to 300 mg QD of TG-1701) resulted in 79% ORR, with 21% CR rate across patients with WM, CLL, marginal zone lymphoma (MZL), diffuse large B-cell lymphoma (DLBCL) and follicular lymphoma (FL) (n=19).

Data presented at ASCO 2021 is available on the Publications page of the Company’s website at https://www.tgtherapeutics.com/publications/.ABOUT TG THERAPEUTICS, INC.TG Therapeutics is a fully-integrated, commercial stage biopharmaceutical company focused on the acquisition, development and commercialization of novel treatments for B-cell malignancies and autoimmune diseases. In addition to an active research pipeline including five investigational medicines across these therapeutic areas, TG has received accelerated approval from the U.S. FDA for UKONIQ® (umbralisib), for the treatment of adult patients with relapsed/refractory marginal zone lymphoma who have received at least one prior anti-CD20-based regimen and relapsed/refractory follicular lymphoma who have received at least three prior lines of systemic therapies. Currently, the Company has three programs in Phase 3 development for the treatment of patients with relapsing forms of multiple sclerosis (RMS) and patients with chronic lymphocytic leukemia (CLL) and several investigational medicines in Phase 1 clinical development. For more information, visit www.tgtherapeutics.com, and follow us on Twitter @TGTherapeutics and Linkedin.UKONIQ® is a registered trademark of TG Therapeutics, Inc.

ABOUT UKONIQ® (umbralisib) UKONIQ is the first and only oral inhibitor of phosphoinositide 3 kinase (PI3K) delta and casein kinase 1 (CK1) epsilon. PI3K-delta is known to play an important role in supporting cell proliferation and survival, cell differentiation, intercellular trafficking and immunity and is expressed in both normal and malignant B-cells. CK1-epsilon is a regulator of oncoprotein translation and has been implicated in the pathogenesis of cancer cells, including lymphoid malignancies. 

UKONIQ is indicated for the treatment of adult patients with relapsed or refractory marginal zone lymphoma (MZL) who have received at least one prior anti-CD20-based regimen and for the treatment of adult patients with relapsed or refractory follicular lymphoma (FL) who have received at least three prior lines of systemic therapy.

These indications are approved under accelerated approval based on overall response rate. Continued approval for this indication may be contingent upon verification and description of clinical benefit in a confirmatory trial.

IMPORTANT SAFETY INFORMATIONInfections: Serious, including fatal, infections occurred in patients treated with UKONIQ. Grade 3 or higher infections occurred in 10% of 335 patients, with fatal infections occurring in