Mast Therapeutics Announces Initiation Of Phase 2a Studies Of AIR001 In Patients With Heart Failure With Preserved Ejection Fraction (HFpEF)

SAN DIEGO, Feb. 4, 2015 /PRNewswire/ -- Mast Therapeutics, Inc. (NYSE MKT: MSTX) today reported the initiation of patient dosing in two institutional-sponsored Phase 2a studies of AIR001 for the treatment of patients experiencing heart failure with preserved ejection fraction (HFpEF).  The Phase 2a studies, currently underway at Mayo Clinic and the University of Pittsburgh, are evaluating the hemodynamic effects of AIR001 in both acute and exercise conditions, as well as change in submaximal oxygen consumption before and after AIR001 versus placebo. A third clinical study designed to compare the hemodynamic benefits versus the formation of methemoglobin comparing intravenous nitrite to AIR001 is expected to begin later this year.

Brian M. Culley, Chief Executive Officer, stated:  "We are pleased to report that patient dosing recently began in these Phase 2a studies of AIR001. Last year, we reported positive top-line results from a Phase 2 study of AIR001 which demonstrated improvements in hemodynamic parameters and exercise capacity and showed that AIR001 was well-tolerated, with no treatment-related serious adverse events. That data showed benefits consistent with prior studies of AIR001, supporting our plans for continued development. We believe the hemodynamic benefits of AIR001 are particularly suited to a HFpEF population with elevated pulmonary artery and pulmonary capillary wedge pressures, for which no FDA-approved therapies are currently available. We anticipate reporting preliminary data from these Phase 2a studies beginning the second half of this year."

About AIR001

AIR001 is a sodium nitrite solution for intermittent inhalation via nebulizer. Nitrite is a physiological signaling molecule with roles in intravascular endocrine nitric oxide (NO) production, hypoxic vasodilation signaling, and cytoprotection after ischemia-reperfusion. Nitrite serves as the largest physiologic reservoir of NO and can be converted to NO independent of nitric oxide synthase (NOS) activity. In experimental models, nitrite use has demonstrated improved remodeling both in the pulmonary vasculature and right ventricle.  Hemodynamic effects include venodilation with reductions in right atrial pressures, pulmonary and systemic vasodilation with reductions in pulmonary vascular resistance and left atrial pressures, and improved cardiac relaxation. Mast Therapeutics obtained the AIR001 program through its acquisition of privately-held Aires Pharmaceuticals, Inc. in 2014.  

About Mast Therapeutics

Mast Therapeutics, Inc. is a publicly traded biopharmaceutical company headquartered in San Diego, California.  The Company is leveraging the MAST (Molecular Adhesion and Sealant Technology) platform, derived from over two decades of clinical, nonclinical and manufacturing experience with purified and non-purified poloxamers, to develop vepoloxamer (MST-188), its lead product candidate, for serious or life-threatening diseases and conditions typically characterized by impaired microvascular blood flow and damaged cell membranes. 

The Company is enrolling subjects in EPIC, a pivotal Phase 3 study of vepoloxamer in sickle cell disease, and in a Phase 2 study to evaluate whether vepoloxamer improves the effectiveness of recombinant tissue plasminogen activator therapy in patients with acute limb ischemia.  The Company also is planning to initiate a Phase 2 study of vepoloxamer in patients with acute decompensated heart failure in the second quarter of 2015. More information can be found on the Company's web site at www.masttherapeutics.com. (Twitter: @MastThera) 

Mast Therapeutics™ and the corporate logo are trademarks of Mast Therapeutics, Inc.

Forward Looking Statements

Mast Therapeutics cautions you that statements included in this press release that are not a description of historical facts are forward-looking statements that are based on the Company's current expectations and assumptions. Such forward-looking statements include, but are not limited to, statements relating to anticipated milestones for the Company's development programs, including AIR001 in HFpEF. Among the factors that could cause or contribute to material differences between the Company's actual results and the expectations indicated by the forward-looking statements are risks and uncertainties that include, but are not limited to: delays in the commencement or completion of clinical studies, including as a result of difficulties in obtaining regulatory agency agreement on clinical development plans or clinical study design, opening trial sites, enrolling study subjects, manufacturing sufficient quantities of clinical trial material, being subject to a "clinical hold," and/or suspension or termination of a clinical study, including due to patient safety concerns or lack of funding; the uncertainty of outcomes in ongoing and future studies of the Company's product candidates and the risk that its product candidates, including vepoloxamer, may not demonstrate adequate safety, efficacy or tolerability in one or more such studies; the potential for institutional review boards or the FDA or other regulatory agencies to require additional nonclinical or clinical studies prior to initiation of a planned clinical study of a product candidate; the risk that, even if clinical studies are successful, the FDA or other regulatory agencies may determine they are not sufficient to support a new drug application; the potential that, even if clinical studies of a product candidate in one indication are successful, clinical studies in another indication may not be successful; the Company's reliance on contract research organizations (CROs), contract manufacturing organizations (CMOs), and other third parties to assist in the conduct of important aspects of development of its product candidates, including clinical studies, manufacturing, and regulatory activities for its product candidates, and that such third parties may fail to perform as expected; the Company's ability to obtain additional funding as needed on a timely basis or on acceptable terms, or at all; the potential for the Company to delay, reduce or discontinue current and/or planned development activities, including clinical studies, partner its product candidates at inopportune times or pursue less expensive but higher-risk and/or lower return development paths if it is unable to raise sufficient additional capital as needed; the risk that, even if the Company successfully develops a product candidate in one or more indications, it may not realize commercial success with its products and may never generate revenue sufficient to achieve profitability; the risk that the Company is not able to adequately protect its intellectual property rights relating to the MAST platform and vepoloxamer or AIR001 and prevent competitors from duplicating or developing equivalent versions of its product candidates; and other risks and uncertainties more fully described in the Company's press releases and periodic filings with the Securities and Exchange Commission. The Company's public filings with the Securities and Exchange Commission are available at www.sec.gov.

You are cautioned not to place undue reliance on forward-looking statements, which speak only as of the date when made. Mast Therapeutics does not intend to revise or update any forward-looking statement set forth in this press release to reflect events or circumstances arising after the date hereof, except as may be required by law.

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SOURCE Mast Therapeutics

Related Links

http://www.masttherapeutics.com

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