Pivotal Phase 3 Data from CONVERT Study of ALIS in Patients with Treatment-Refractory NTM Lung Disease Caused by MAC Published in American Journal of Respiratory and Critical Care Medicine

--As previously reported, study met primary endpoint of culture conversion (p<0.0001)--

--ALIS under FDA Priority Review with PDUFA action date of September 28, 2018--

BRIDGEWATER, N.J., Sept. 17, 2018 (GLOBE NEWSWIRE) -- Insmed Incorporated (Nasdaq:INSM), a global biopharmaceutical company focused on the unmet needs of patients with rare diseases, today announced that data from the pivotal Phase 3 CONVERT study evaluating the safety and efficacy of ALIS (amikacin liposome inhalation suspension) in adult patients with treatment-refractory nontuberculous mycobacterial (NTM) lung disease caused by Mycobacterium avium complex (MAC) were published online in the American Journal of Respiratory and Critical Care Medicine. The study showed that the addition of ALIS to guideline-based therapy (GBT) eliminated evidence of NTM lung disease caused by MAC in sputum cultures by Month 6 in 29.0% of patients (65/224), compared to 8.9% of patients (10/112) on GBT alone (p<0.0001).

NTM lung disease is a chronic, debilitating condition that can cause severe, permanent damage to the lungs. If approved by the U.S. Food and Drug Administration (FDA), ALIS will be the first and only therapy in the U.S. specifically indicated for the treatment of patients with NTM lung disease caused by MAC.

“The high rate of culture conversion achieved by patients in this study who received ALIS plus guideline-based therapy is remarkable, particularly given that these patients had previously failed treatment with the guideline-based therapy,” said David Griffith, M.D., Professor of Medicine, W.A and E.B. Moncrief Distinguished Professor at The University of Texas Health Science Center and Principal Investigator in the CONVERT study. “Importantly, the study used a stringent definition of culture conversion—the microbiological goal of NTM lung disease treatment—setting a high threshold of success for ALIS. These results are very meaningful for the NTM lung disease community, which has not seen a treatment advance like this in more than 30 years.”

The CONVERT study enrolled 336 adult patients with NTM lung disease caused by MAC who were refractory to at least six months of GBT. Patients were randomized 2:1 to receive ALIS plus GBT versus GBT alone. The primary endpoint was the proportion of patients achieving culture conversion by Month 6. Culture conversion was achieved if patients had three consecutive monthly negative sputum cultures, with all sputum samples collected at each visit required to be culture-negative.

“The CONVERT study is a landmark clinical trial that is evaluating, for the first time, a treatment for NTM lung disease in a controlled, global, Phase 3 setting. We are very pleased that the study met its primary endpoint and we look forward to evaluating further data, including the durability of culture conversion for patients treated with ALIS,” said Paul Streck, Chief Medical Officer of Insmed.  “As always, we are grateful to the patients and physicians participating in the CONVERT study for their efforts to help bring forward the first-ever treatment for this rare, devastating, and difficult-to-treat disease.”

In the study, rates of serious treatment-emergent adverse events were similar between treatment arms (20.2% for ALIS+GBT vs. 17.9% for GBT alone). Overall the rate of reported adverse events in the ALIS plus GBT arm was higher (98.2% for ALIS+GBT vs. 91.1% for GBT alone). TEAEs led to discontinuation of ALIS in 17.4% of patients. The most common TEAEs (occurring in ≥10% of patients) were primarily respiratory events and were predominately mild or moderate in nature. Most of these common events were initially reported in the first month of ALIS treatment and infrequently led to discontinuation of ALIS (dyspnea, 3.1%; dysphonia, 2.2%; all others <1%) or withdrawal from the study. Side effects commonly associated with intravenous use of amikacin, including hearing loss or renal impairment, were infrequent and generally similar between treatment groups with the exception of tinnitus (7.6% for ALIS+GBT vs. 0.9% for GBT alone).

Insmed’s new drug application for ALIS is currently under Priority Review by the FDA with an action date of September 28, 2018 under the Prescription Drug User Fee Act (PDUFA). The FDA has previously designated ALIS an orphan drug, a breakthrough therapy, and a Qualified Infectious Disease Product (QIDP) under the Generating Antibiotic Incentives Now (GAIN) Act. ALIS is administered once daily using an optimized eFlow^® Electronic Nebulizer (PARI Pharma GmbH).

About CONVERT (INS-212) and INS-312

CONVERT is a randomized, open-label, global Phase 3 trial designed to confirm the culture conversion results seen in Insmed's Phase 2 clinical trial of ALIS in patients with refractory NTM lung disease caused by MAC. CONVERT is being conducted in 18 countries at more than 125 sites. The primary efficacy endpoint is the proportion of patients who achieved culture conversion at Month 6 in the ALIS plus GBT arm compared to the GBT-only arm. Patients who achieved culture conversion by Month 6 are continuing in the CONVERT study for an additional 12 months of treatment following the first monthly negative sputum culture. Patients who did not culture convert may have been eligible to enroll in our INS-312 study. INS-312 is a single-arm open-label extension study for patients who completed six months of treatment in the INS-212 study but did not demonstrate culture conversion by Month 6. Under the study protocol, non-converting patients in the ALIS plus GBT arm of the INS-212 study will receive an additional 12 months of ALIS plus GBT. Patients who crossed over from the GBT-only arm of the INS-212 study will receive 12 months of treatment of ALIS plus GBT.

About NTM Lung Disease

NTM lung disease is a rare and serious disorder associated with increased rates of morbidity and mortality. There is an increasing prevalence of lung disease caused by NTM and Insmed believes it is an emerging public health concern worldwide. Patients with NTM lung disease may experience a multitude of symptoms such as fever, weight loss, cough, lack of appetite, night sweats, blood in the sputum, and fatigue. Patients with NTM lung disease frequently require lengthy hospital stays to manage their condition.  Insmed is not aware of any approved inhaled therapies specifically indicated for refractory NTM lung disease caused by MAC in North America, Japan or Europe.  Current guideline-based approaches involve use of multi-drug regimens not approved for the treatment of NTM lung disease, and treatment can be as long as two years or more.

The prevalence of human disease attributable to NTM has increased over the past two decades. In a decade long study (1997 to 2007), researchers found that the prevalence of NTM lung disease in the U.S. was increasing at approximately 8% per year and that NTM patients on Medicare over the age of 65 were 40% more likely to die over the period of the study than those who did not have the disease. In the U.S., Insmed estimates there will be between 75,000 and 105,000 patients with diagnosed NTM lung disease in 2018, of which the Company expects 40,000 to 50,000 will be treated for NTM lung disease caused by MAC.  Insmed expects that between 10,000 and 15,000 of these patients will be refractory to treatment.  In Japan, Insmed estimates there will be between 125,000 and 145,000 patients with diagnosed NTM lung disease in 2018, with approximately 60,000 to 70,000 of those patients being treated for NTM lung disease caused by MAC and 15,000 to 18,000 of these treated patients being refractory to treatment. Insmed also estimates there will be approximately 14,000 patients with diagnosed NTM lung disease in the EU5 (comprised of France, Germany, Italy, Spain and the United Kingdom) in 2018, of which the Company estimates approximately 4,400 will be treated for NTM lung disease caused by MAC and approximately 1,400 of these treated patients will be refractory to treatment.

About ALIS

ALIS is a novel, inhaled, once-daily formulation of amikacin that is in late-stage clinical development and under regulatory review by the FDA for adult patients with NTM lung disease caused by MAC. Amikacin solution for parenteral administration is an established drug that has activity against a variety of NTM; however, its use is limited by the need to administer it intravenously and by toxicity to hearing, balance, and kidney function. Insmed's advanced pulmonary liposome technology uses charge neutral liposomes to deliver amikacin directly to the lung where it is taken up by the lung macrophages where the NTM infection resides. This prolongs the release of amikacin in the lungs while minimizing systemic exposure, thereby offering the potential for decreased systemic toxicities. ALIS's ability to deliver high levels of amikacin directly to the lung distinguishes it from intravenous amikacin. ALIS is administered once daily using an optimized eFlow^® Electronic Nebulizer (PARI Pharma GmbH).

About PARI Pharma and the eFlow^® Electronic Nebulizer

ALIS is delivered by a novel inhalation device, the eFlow^® Electronic Nebulizer, developed by PARI Pharma GmbH. eFlow is a quiet, portable nebulizer that enables efficient aerosolization of liquid medications, including liposomal formulations such as ALIS, via a vibrating, perforated membrane. Based on PARI's 100-year history working with aerosols, PARI Pharma is dedicated to advancing inhalation therapies by developing innovative delivery platforms and new pharmaceutical formulations that work together to improve patient care.

About Insmed

Insmed Incorporated is a global biopharmaceutical company focused on the unmet needs of patients with rare diseases. The Company’s lead product candidate is ALIS, which is in late-stage development and under regulatory review by the FDA for adult patients with NTM lung disease caused by MAC, a rare and often chronic infection that is capable of causing irreversible lung damage and can be fatal.  Insmed's earlier-stage clinical pipeline includes INS1007, a novel oral reversible inhibitor of dipeptidyl peptidase 1 with therapeutic potential in non-cystic fibrosis bronchiectasis and other inflammatory diseases, and INS1009, an inhaled nanoparticle formulation of a treprostinil prodrug that may offer a differentiated product profile for rare pulmonary disorders, including pulmonary arterial hypertension.  For more information, visit www.insmed.com.

Forward-looking Statements

This press release contains forward-looking statements that involve substantial risks and uncertainties. "Forward-looking statements," as that term is defined in the Private Securities Litigation Reform Act of 1995, are statements that are not historical facts and involve a number of risks and uncertainties. Words herein such as "may," "will," "should," "could," "would," "expects," "plans," "anticipates," "believes," "estimates," "projects," "predicts," "intends," "potential," "continues," and similar expressions (as well as other words or expressions referencing future events, conditions or circumstances) may identify forward-looking statements.

The forward-looking statements in this press release are based upon the Company’s current expectations and beliefs, and involve known and unknown risks, uncertainties and other factors, which may cause the Company’s actual results, performance and achievements and the timing of certain events to differ materially from the results, performance, achievements or timing discussed, projected, anticipated or indicated in any forward-looking statements. Such risks, uncertainties and other factors include, among others, the following: risks that the remainder of the data from the treatment and off-treatment phases of INS-212 will not be consistent with the six-month results of the study; uncertainties in the research and development of the Company’s existing product candidates, including due to delays in data readouts, such as the full data from the INS-212 study, patient enrollment and retention or failure of the Company’s preclinical studies or clinical trials to satisfy pre-established endpoints, including secondary endpoints in the INS-212 study and endpoints in the INS-212 extension study (the INS-312 study); risks that subsequent data from the INS-312 study will not be consistent with the interim results; failure to obtain, or delays in obtaining, regulatory approval from the U.S. Food and Drug Administration, Japan’s Ministry of Health, Labour and Welfare, Japan’s Pharmaceuticals and Medical Devices Agency, the European Medicines Agency, and other regulatory authorities for the Company’s product candidates or their delivery devices, such as the eFlow Nebulizer System, including due to insufficient clinical data, selection of endpoints that are not satisfactory to regulators, extensions of action dates under PDUFA or complexity in the review process for combination products; imposition of significant post-approval regulatory requirements on our product candidates or failure to maintain regulatory approval for the Company’s product candidates, if received, due to a failure to satisfy post-approval regulatory requirements, such as the submission of sufficient data from confirmatory clinical studies; safety and efficacy concerns related to the Company’s product candidates; lack of experience in conducting and managing preclinical development activities and clinical trials necessary for regulatory approval, including the regulatory filing and review process; uncertainties in the rate and degree of market acceptance of product candidates, if approved; inability to create an effective direct sales and marketing infrastructure or to partner with third parties that offer such an infrastructure for distribution of the Company’s product candidates, if approved; inaccuracies in the Company’s estimates of the size of the potential markets for the Company’s product candidates or limitations by regulators on the proposed treatment population for the Company’s product candidates; failure of third parties on which the Company is dependent to conduct the Company’s clinical trials, to manufacture sufficient quantities of the Company’s product candidates for clinical or commercial needs, including the Company’s raw materials suppliers, or to comply with the Company’s agreements or laws and regulations that impact the Company’s business; inaccurate estimates regarding the Company’s future capital requirements, including those necessary to fund the Company’s ongoing clinical development, regulatory and commercialization efforts as well as milestone payments or royalties owed to third parties; failure to develop, or to license for development, additional product candidates, including a failure to attract experienced third-party collaborators; uncertainties in the timing, scope and rate of reimbursement for the Company’s product candidates; changes in laws and regulations applicable to the Company’s business and failure to comply with such laws and regulations; inability to repay the Company’s existing indebtedness or to obtain additional capital when needed on desirable terms or at all; failure to obtain, protect and enforce the Company’s patents and other intellectual property and costs associated with litigation or other proceedings related to such matters; restrictions imposed on the Company by license agreements that are critical for the Company’s product development, including the Company’s license agreements with PARI Pharma GmbH and AstraZeneca AB, and failure to comply with the Company’s obligations under such agreements; competitive developments affecting the Company’s product candidates and potential exclusivity related thereto; the cost and potential reputational damage resulting from litigation to which the Company is or may become a party; loss of key personnel; and lack of experience operating internationally. 

The Company may not actually achieve the results, plans, intentions or expectations indicated by the Company’s forward-looking statements because, by their nature, forward-looking statements involve risks and uncertainties because they relate to events and depend on circumstances that may or may not occur in the future. For additional information about the risks and uncertainties that may affect the Company’s business, please see the factors discussed in Item 1A, "Risk Factors," in the Company’s Annual Report on Form 10-K for the year ended December 31, 2017 and any subsequent filings with the Securities and Exchange Commission.

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Contact:

Blaine Davis
Insmed Incorporated
(908) 947-2841
blaine.davis@insmed.com