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99% median B-cell depletion was observed at week 4 and maintained at week 24 (6 months) (n=24)

TG-1101 was well tolerated across all patients including those receiving 1 hour infusions of the Phase 3 450mg dose

NEW YORK, Oct. 27, 2017 (GLOBE NEWSWIRE) -- TG Therapeutics, Inc. (NASDAQ:TGTX), today announced additional results from the Phase 2 multicenter trial of TG-1101 (ublituximab), the Company's novel glycoengineered anti-CD20 monoclonal antibody, in relapsing forms of Multiple Sclerosis (RMS). This data is being presented today during Poster Session 2, from 15:30 - 17:00 CEST, at the 7^th Joint ECTRIMS - ACTRIMS meeting in Paris, France. Data from this trial was also presented at the conference yesterday.

Michael S. Weiss, the Company's Executive Chairman and Chief Executive Officer stated, "We are extremely pleased by the data presented today showing not only rapid and near complete B-cell depletion at week 4, as previously presented, but that these levels of depletion are also sustained nearly 6 months later with no additional infusions of ublituximab. Today's data coupled with yesterday's presentations showing complete elimination of T1 Gd-enhancing lesions in the first 20 patients treated, a well-tolerated safety profile, and improvements in EDSS give us increased confidence in our currently enrolling Phase 3 program." Mr. Weiss continued, "With what we believe to be an appealing and differentiated profile in MS we look forward to strong enrollment into our Phase 3 program and future presentations from the Phase 2 study as the data continues to mature."

"This updated data presentation on the robust B-cell depletion occurring with ublituximab therapy is impressive in that the antibody appears to be extremely effective at rapidly depleting B-cells while maintaining those levels of depletion through 24 weeks. It is also very encouraging to see that the remainder of the immune system - NK cells, T-cells, and monocytes are able to return to a state of homeostasis shortly following ublituximab infusions. B-cell depleting agents have become an important treatment option for patients suffering from MS, and provided future data presentations and analysis continue to demonstrate the effects seen in the Phase 2 study, ublituximab could be an attractive treatment option for patients," stated Amy Lovett-Racke, PhD, Professor of the Department of Microbial Infection and Immunity at the Ohio State University Medical Center in Columbus, OH.

This Phase 2 trial is a 52-week randomized, placebo controlled, multi-center study evaluating the safety and efficacy of TG-1101 (ublituximab) at accelerated infusion times. Today's posters include data from 24 patients with RMS that were treated with TG-1101 across three dosing cohorts. 

Poster Presentation Title: Placebo controlled, phase 2a multicenter study of ublituximab (UTX), a novel glycoengineered anti-CD20 monoclonal antibody (mAb), in patients with relapsing forms of multiple sclerosis (RMS): 6 months analysis of B cell subsets

Poster Highlights:

• TG-1101 was well tolerated and demonstrates rapid and robust B-cell depletion with rapid infusions, as low as a one hour for the 450mg Phase 3 dose
• B-cells are efficiently depleted in most patients within 24 hours of receiving the first dose of TG-1101, with 99% depletion observed at week 4 and maintained at week 24 (6 months) (n=24)
• The fluctuation in NK cells, T-cells and monocytes that occurred in response to B-cell depletion is corrected within 4 weeks post initial TG-1101 treatment
• No significant effect of TG-1101 treatment was observed at Week 24 on the NK cells, T-cells or monocytes, illustrating immune homeostasis in non-B cells

These data presentations support the recently announced international Phase 3 program evaluating TG-1101 (ublituximab) for the treatment of relapsing form of Multiple Sclerosis (RMS). The Phase 3 trials, entitled ULTIMATE I and ULTIMATE II, are being conducted under Special Protocol Assessment (SPA) agreement with the U.S. Food and Drug Administration (FDA) and will be led by Lawrence Steinman, MD, of Stanford University.

POSTERS

A copy of the above posters can be found on the Publications page, located within the Pipeline section, of the Company's website at www.tgtxinc.com/publications.cfm.

ABOUT TG THERAPEUTICS, INC.

TG Therapeutics is a biopharmaceutical company focused on the acquisition, development and commercialization of novel treatments for B-cell malignancies and autoimmune diseases. Currently, the company is developing two therapies targeting hematological malignancies and autoimmune diseases. TG-1101 (ublituximab) is a novel, glycoengineered monoclonal antibody that targets a specific and unique epitope on the CD20 antigen found on mature B-lymphocytes. TG Therapeutics is also developing TGR-1202 (umbralisib), an orally available PI3K delta inhibitor. The delta isoform of PI3K is strongly expressed in cells of hematopoietic origin and is believed to be important in the proliferation and survival of B‐lymphocytes. Both TG-1101 and TGR-1202, or the combination of which is referred to as "U2", are in Phase 3 clinical development for patients with hematologic malignancies, with TG-1101 also in Phase 3 clinical development for Multiple Sclerosis. Additionally, the Company has recently brought its anti-PD-L1 monoclonal antibody into Phase 1 development and aims to bring additional pipeline assets into the clinic in the future. TG Therapeutics is headquartered in New York City.

Cautionary Statement

Statements included in this press release, particularly those with respect to anticipating the benefit of the early data seen in the Phase 2 MS trial and anticipating the timing of our MS Phase 3 program may be forward-looking statements that involve a number of risks and uncertainties. For those statements, we claim the protection of the safe harbor for forward-looking statements contained in the Private Securities Litigation Reform Act of 1995. Among the factors that could cause our actual results to differ materially are the following: our ability to successfully and cost-effectively complete the MS Phase 2 and Phase 3 trials; the risk that early clinical results that supported our decision to move forward will not be reproduced in additional patients in expansion cohorts or in the MS Phase 3 program; the risk that data included in the posters presented will be reproduced in subsequent data presentations; the risk that the clinical results from the MS Phase 3 program, will not be positive and/or will not support regulatory approval of TG-1101 for MS; the risk that TG-1101 will not have a differentiated profile from the other drugs in the class and that early signs of best-in-class attributes will not be supported by future results; the risk that trials will take longer to enroll than expected; our ability to achieve the milestones we project over the next year; our ability to manage our cash in line with our projections, and other risk factors identified from time to time in our reports filed with the Securities and Exchange Commission. Any forward-looking statements set forth in this press release speak only as of the date of this press release. We do not undertake to update any of these forward-looking statements to reflect events or circumstances that occur after the date hereof. This press release and prior releases are available at www.tgtherapeutics.com. The information found on our website is not incorporated by reference into this press release and is included for reference purposes only.

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CONTACT:

Jenna Bosco
Vice President, Investor Relations
TG Therapeutics, Inc.
Telephone: 212.554.4351
Email: ir@tgtxinc.com

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