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UCB Accelerates Anti-FcRn Rozanolixizumab in Myasthenia Gravis Into Confirmatory Development Phase


News provided by

UCB

18 Oct, 2018, 05:00 GMT

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BRUSSELS, October 18, 2018 /PRNewswire/ --

  • Positive outcomes in proof-of-concept study with subcutaneous rozanolixizumab in patients with myasthenia gravis (MG): clinically meaningful improvement in multiple disease-related endpoints
  • Strong 68% mean reduction of Serum IgG and IgG Autoantibodies observed
  • Safety profile in-line with subcutaneous dosing in phase 1 and the safety profile observed in the proof-of-concept immune thrombocytopenia (ITP) study
  • Proof-of-concept has been achieved in myasthenia gravis
  • Confirmatory development study with rozanolixizumab in patients with myasthenia gravis to start in H2 2019

UCB today announced positive results from a phase 2 study (MG0002; NCT03052751) with a novel, subcutaneous FcRn (neonatal Fc receptor) monoclonal antibody, rozanolixizumab, in patients with myasthenia gravis (MG), achieving proof-of-concept. Based on these results UCB intends to accelerate the development of rozanolixizumab with a confirmatory study in MG starting in the second half of 2019.

Professor Vera Bril, MD, University of Toronto, coordinating investigator for the MG0002 study said: "I am very excited about these positive results with subcutaneous rozanolixizumab. Today, there is a clear need for safe, effective, non-invasive, non-burdensome therapies for patients with generalized MG, who continue to face serious, potentially life-threatening symptoms associated with their disease."

Dr Dhaval Patel, Executive Vice President and Head of NewMedicines at UCB said: "First I would like to express my sincere thanks to the patients, investigators, care partners and all those who contributed to this important study. The results strengthen our conviction that reducing pathogenic autoantibodies with the most advanced subcutaneous anti-FcRn therapy in clinical development may offer an innovative approach to improve outcomes and treatment experience for patients with myasthenia gravis. In addition, the results give rise to the expectation of potential therapeutic benefit in other IgG autoantibody-mediated conditions."

Full data from MG0002 show that subcutaneous infusions of rozanolixizumab were safe and well tolerated and resulted in clinical improvement over the entire duration of the study. Clinical benefits were observed across several pre-specified disease-related endpoints, including Quantitative Myasthenia Gravis (QMG) score, Myasthenia Gravis Composite (MGC) responder rate and Myasthenia Gravis-Activities of Daily living (MG-ADL) score.

Building on the potential clinical utility of rozanolixizumab in other neurological conditions driven by pathogenic immunoglobulin G (IgG) autoantibodies, UCB will initiate a phase 2 study in patients with chronic inflammatory demyelinating polyneuropathy (CIDP) in the first quarter 2019. UCB is also advancing development in immune thrombocytopenia (ITP), with results from an on-going dose ranging study expected at the end of 2018.

Study Design: MG0002 (NCT03052751) was a Phase 2 randomized, placebo-controlled, proof-of-concept trial that enrolled 43 MG patients from North America and Europe with generalized muscle weakness and a total QMG of at least 11. MG0002 compared three once/week subcutaneous infusions of placebo (N=22) and 7 mg/Kg rozanolixizumab (N=21) on days 1, 8, 15 and were compared during a four-week period (dosing period 1).

After dosing period 1, participants were re-randomized to receive either 7 mg/Kg or 4 mg/Kg rozanolixizumab on days 29, 36, and 43 (dosing period 2) with continued observation until day 99. Conventional therapies were allowed and included corticosteroids and/or immunomodulatory agents and/or Cholinesterase inhibitors. The protocol included no specific headache prophylaxis and mandated withdrawal of patients with severe headache. Pre-specified analyses of safety and efficacy across both dosing periods looked at the data following six subcutaneous infusions of rozanolixizumab.

Study Results: At the end of dosing period 1: The baseline-corrected delta in QMG between rozanolixizumab and placebo was -0.7 (p = 0.221), the baseline-corrected delta in MGC score was -1.8 (p = 0.089) and the baseline-corrected delta in MG-ADL score was -1.4 (p = 0.036). In a post-hoc analysis, the absolute change from baseline in the MG-ADL score, an established registration endpoint, was -2.0 for rozanolixizumab compared to -0.18 for placebo (p = 0.008).

The QMG responder rate was 38.1% compared to 22.7% for placebo (p=0.223), the MGC responder rate was 47.6% compared to 27.3% for placebo (p=0.144), and the MG-ADL responder rate was 47.6% compared to 13.6% for placebo (p=0.017). Response was defined as a reduction of 3 or more points from baseline for all scores.

During dosing period 2, additional clinically meaningful reductions of all scores were observed. Pre-specified analyses across the two dosing periods (i.e. following six subcutaneous infusions of rozanolixizumab) showed clinically meaningful patient benefit consistently across several disease-specific endpoints, including QMG, MGC and MG-ADL. Participants on active treatment showed a marked reduction of total IgG levels and IgG autoantibody levels. Serum IgG concentrations reduced by 56% after two weeks of rozanolixizumab treatment. Total IgG and anti-acetylcholine receptor (anti-AChR) antibodies decreased by 68% from baseline during dosing period 2 in participants receiving rozanolixizumab 7 mg/Kg in both dosing periods.

Safety profile: Safety and tolerability of rozanolixizumab were confirmed and in-line with subcutaneous dosing in the phase 1 program and the safety profile observed in the proof of concept ITP study. There was an expected greater frequency of headache (57.1%) compared to placebo (13.6%) during dosing period 1. Per protocol, three rozanolixizumab-treated participants with headache were withdrawn from the study. All headaches were manageable and resolved with standard therapies. The incidence of infections between rozanolixizumab and placebo was similar.

The full data will be presented at a medical congress in the near future and submitted for publication in a peer-reviewed journal.

Rozanolixizumab is a novel, subcutaneous anti-FcRn monoclonal antibody in clinical development at UCB and not approved in any region of the world.

About UCB
UCB, Brussels, Belgium (http://www.ucb.com ) is a global biopharmaceutical company focused on the discovery and development of innovative medicines and solutions to transform the lives of people living with severe diseases of the immune system or of the central nervous system. With more than 7 500 people in approximately 40 countries, the company generated revenue of € 4.5 billion in 2017. UCB is listed on Euronext Brussels (symbol: UCB). Follow us on Twitter: @UCB_news

Forward looking statements
This press release contains forward-looking statements based on current plans, estimates and beliefs of management. All statements, other than statements of historical fact, are statements that could be deemed forward-looking statements, including estimates of revenues, operating margins, capital expenditures, cash, other financial information, expected legal, political, regulatory or clinical results and other such estimates and results. By their nature, such forward-looking statements are not guarantees of future performance and are subject to risks, uncertainties and assumptions which could cause actual results to differ materially from those that may be implied by such forward-looking statements contained in this press release. Important factors that could result in such differences include: changes in general economic, business and competitive conditions, the inability to obtain necessary regulatory approvals or to obtain them on acceptable terms, costs associated with research and development, changes in the prospects for products in the pipeline or under development by UCB, effects of future judicial decisions or governmental investigations, product liability claims, challenges to patent protection for products or product candidates, changes in laws or regulations, exchange rate fluctuations, changes or uncertainties in tax laws or the administration of such laws and hiring and retention of its employees.

Additionally, information contained in this document shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any offer, solicitation or sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of such jurisdiction. UCB is providing this information as of the date of this document and expressly disclaims any duty to update any information contained in this press release, either to confirm the actual results or to report a change in its expectations.

There is no guarantee that new product candidates in the pipeline will progress to product approval or that new indications for existing products will be developed and approved. Products or potential products which are the subject of partnerships, joint ventures or licensing collaborations may be subject to differences between the partners. Also, UCB or others could discover safety, side effects or manufacturing problems with its products after they are marketed.

Moreover, sales may be impacted by international and domestic trends toward managed care and health care cost containment and the reimbursement policies imposed by third-party payers as well as legislation affecting biopharmaceutical pricing and reimbursement.

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