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Theravance Biopharma Announces First Patient Dosed in Phase 2 Study of TD-0903 for the Treatment of Hospitalized Patients with Acute Lung Injury Caused by COVID-19

·9 min read

DUBLIN and SOUTH SAN FRANCISCO, Calif., June 25, 2020 /PRNewswire/ -- Theravance Biopharma, Inc. (NASDAQ: TBPH) ("Theravance Biopharma" or the "Company"), a diversified biopharmaceutical company primarily focused on the discovery, development and commercialization of organ-selective medicines, today announced that the first COVID-19 patient has been dosed in a Phase 2 study of TD-0903. TD-0903 is a lung-selective, nebulized Janus kinase inhibitor (JAKi) in development for the potential treatment of hospitalized patients with Acute Lung Injury (ALI) caused by COVID-19. The Company believes TD-0903 has the potential to inhibit the cytokine storm associated with ALI and prevent progression to Acute Respiratory Distress Syndrome (ARDS).

Theravance Biopharma Logo (PRNewsfoto/Theravance Biopharma, Inc.)
Theravance Biopharma Logo (PRNewsfoto/Theravance Biopharma, Inc.)

The initiation of the Phase 2 study in patients in the United Kingdom (UK) follows the successful completion of dosing in the Phase 1 study in healthy volunteers at the same clinical unit in the UK, allowing for a rapid transition to Phase 2.

The Phase 2 study consists of two parts. The first part will assess the safety, tolerability and clinical response to treatment in sequential ascending dose cohorts of hospitalized COVID-19 patients, with each patient being dosed for 7 days. Patients will be enrolled if they demonstrate hypoxia (lack of oxygen in the blood) as that is believed to be a marker of underlying hyperinflammation (cytokine storm) in the lung. More information can be found on clinicaltrials.gov, identifier number: NCT04402866. The second part will be a larger, multi-center study conducted at hospital-based clinical sites in the UK, as well as other European countries and in the United States, pending appropriate Ethics Committee and regulatory approvals in those territories.

"A subgroup of hospitalized patients with COVID-19 develops Acute Lung Injury due to a dysfunctional immune response to the virus within the lungs resulting in hypoxia which then requires hospitalization, supplemental oxygen and in some cases even mechanical ventilation in the ICU if patients develop Acute Respiratory Distress Syndrome (ARDS). Delivery of a JAK inhibitor directly to the lung could be an important intervention to treat this hyperinflammation and to prevent patients from deteriorating to the point where they need assisted ventilation or ICU admission," said Professor Ashley Woodcock, Chairman of the Medicines Evaluation Unit (MEU) conducting the Phase 1 and Phase 2 studies, Associate Dean for Clinical Affairs, Professor of Respiratory Medicine, University of Manchester and Consultant Physician, NW Lung Centre, Manchester University NHS Foundation Trust.i "We are pleased to be leading the clinical trial on behalf of Theravance Biopharma to efficiently evaluate the safety and efficacy of TD-0903 in this patient population to inform its potential role in the fight against COVID-19."

"Working with the Medicines Evaluation Unit over the past few months has once again been an outstanding experience as we mobilized our response to COVID-19. The initiation of the Phase 2 study of TD-0903 is a significant milestone in our ongoing efforts to apply our organ-selective therapies and expertise to treat inflammatory conditions," said Rick E Winningham, Chief Executive Officer at Theravance Biopharma. "Theravance Biopharma has a long history of developing lung-selective medicines to treat respiratory disease, and we are proud to leverage this experience and expertise to respond to the current pandemic."

About TD-0903

JAK inhibitors function by inhibiting the activity of one or more of the Janus kinase family of enzymes (JAK1, JAK2, JAK3, TYK2) that play a key role in cytokine signaling. Inhibiting these JAK enzymes interferes with the JAK/STAT signaling pathway and, in turn, modulates the activity of a wide range of pro-inflammatory cytokines. Limiting JAK inhibition to the lung is expected to improve the therapeutic index relative to systemic inhibition. Thus, inhaled JAK inhibitors with lung-restricted exposure are of high interest as potential treatments for respiratory illness.

TD-0903 is a lung-selective, nebulized pan-JAK inhibitor that was discovered and developed at Theravance Biopharma. TD-0903 has been shown in experimental murine models to have potent, broad inhibition of JAK-STAT signaling in the airways following challenges with multiple cytokines. By its mechanism, TD-0903 has the potential to block the release of cytokines and chemokines that may be associated with Acute Lung Injury and the initiation of a cytokine storm syndrome. Preclinical studies suggest that TD-0903 has a very high lung:plasma ratio and rapid metabolic clearance resulting in low systemic exposure, compatible with its lung selectivity. TD-0903 is administered via a nebulized inhalation solution, which further enhances its lung selectivity. Preclinical pharmacodynamic studies indicate that TD-0903 has an extended duration of action that should enable once or twice daily dosing in humans.

As disclosed initially at Theravance Biopharma's December 2018 Research and Development Day, the Company indicated the initial clinical application of TD-0903 would be to explore its utility in preventing/delaying graft rejection among individuals receiving lung transplantation. Although this is still a potential clinical application for TD-0903, in response to the current COVID-19 pandemic, the Company has prioritized activities toward assessing the potential for TD-0903 to treat hospitalized COVID-19 patients who become short of breath and whose blood oxygen levels begin to drop. These patients are at increased risk of respiratory complications including ALI and ARDS. They may also require prolonged hospitalization, continuous oxygen and, in the most severe cases, admission to ICU to assist their breathing with non-invasive and/or mechanical ventilation. Treatment with JAK inhibition is recognized as an important anti-inflammatory mechanism to potentially reduce the hyperinflammation seen in hospitalized COVID-19 patients who develop ALI and ARDS.ii

For more information please visit: https://investor.theravance.com/events-and-presentations

About Theravance Biopharma

Theravance Biopharma, Inc. is a diversified biopharmaceutical company primarily focused on the discovery, development and commercialization of organ-selective medicines. Our purpose is to create transformational medicines to improve the lives of patients suffering from serious illnesses. Our research is focused in the areas of inflammation and immunology.

In pursuit of our purpose, we apply insights and innovation at each stage of our business and utilize our internal capabilities and those of partners around the world. We apply organ-selective expertise to biologically compelling targets to discover and develop medicines designed to treat underserved localized diseases and to limit systemic exposure, in order to maximize patient benefit and minimize risk. These efforts leverage years of experience in developing lung-selective medicines to treat respiratory disease, including FDA-approved YUPELRI® (revefenacin) inhalation solution indicated for the maintenance treatment of patients with chronic obstructive pulmonary disease (COPD). Our pipeline of internally discovered programs is targeted to address significant patient needs.

We have an economic interest in potential future payments from Glaxo Group Limited or one of its affiliates (GSK) pursuant to its agreements with Innoviva, Inc. relating to certain programs, including TRELEGY ELLIPTA.

For more information, please visit www.theravance.com.

THERAVANCE® and the Cross/Star logo are registered trademarks of the Theravance Biopharma group of companies. YUPELRI® is a United States registered trademark of Mylan Specialty L.P. Trademarks, trade names or service marks of other companies appearing on this press release are the property of their respective owners.

This press release contains certain "forward-looking" statements as that term is defined in the Private Securities Litigation Reform Act of 1995 regarding, among other things, statements relating to goals, plans, objectives, expectations and future events. Theravance Biopharma intends such forward-looking statements to be covered by the safe harbor provisions for forward-looking statements contained in Section 21E of the Securities Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995. Examples of such statements include statements relating to the Company's strategies, plans and objectives, the Company's regulatory strategies and timing of clinical studies (including the data therefrom), the potential benefits and mechanisms of action of the Company's product and product candidates, particularly TD-0903, the Company's expectations for product candidates through development and potential regulatory approval and commercialization (including their potential as components of combination therapies), expectations for the repayment of its notes and the expected future commercial performance of TRELEGY ELLIPTA. These statements are based on the current estimates and assumptions of the management of Theravance Biopharma as of the date of the press release and are subject to risks, uncertainties, changes in circumstances, assumptions and other factors that may cause the actual results of Theravance Biopharma to be materially different from those reflected in the forward-looking statements. Important factors that could cause actual results to differ materially from those indicated by such forward-looking statements include, among others, risks related to: impacts of the COVID-19 global pandemic on our business, delays or difficulties in commencing, enrolling or completing clinical studies, the potential that results from clinical or non-clinical studies indicate the Company's compounds or product candidates are unsafe or ineffective, risks that product candidates do not obtain approval from regulatory authorities, the feasibility of undertaking future clinical trials for our product candidates based on policies and feedback from regulatory authorities, dependence on third parties to conduct clinical studies, delays or failure to achieve and maintain regulatory approvals for product candidates, risks of collaborating with or relying on third parties to discover, develop, manufacture and commercialize products, risks associated with establishing and maintaining sales, marketing and distribution capabilities with appropriate technical expertise and supporting infrastructure, potential future disagreements with Innoviva, Inc. and TRC LLC, the uncertainty of arbitration and litigation and the possibility that an arbitration award or litigation result could be adverse to the Company. Other risks affecting Theravance Biopharma are in the company's Form 10-Q filed with the SEC on May 8, 2020, and other periodic reports filed with the SEC. In addition to the risks described above and in Theravance Biopharma's filings with the SEC, other unknown or unpredictable factors also could affect Theravance Biopharma's results. No forward-looking statements can be guaranteed and actual results may differ materially from such statements. Given these uncertainties, you should not place undue reliance on these forward-looking statements. Theravance Biopharma assumes no obligation to update its forward-looking statements on account of new information, future events or otherwise, except as required by law.

Contact Information
Gail B. Cohen
Corporate Communications and Investor Relations
917-214-6603

i Professor Woodcock is an independent consultant to Theravance Biopharma and is reimbursed on an hourly basis for his consultancy services
ii The Lancet, March 13, 2020, "COVID-19: consider cytokine storm syndromes and immunosuppression" Mehta, McAuley, Brown, Sanchez, Tattersall, Manson, et al.

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