Aradigm Submits Marketing Authorisation Application (MAA) to EMA for EU Marketing Approval of Linhaliq in Non-Cystic Fibrosis Bronchiectasis

HAYWARD, CA, USA I March 9, 2018 I Aradigm Corporation (NASDAQ: ARDM) (the "Company") today announced it has submitted its Marketing Authorisation Application (MAA) to European Medicines Agency (EMA) for Linhaliq™ for the treatment of non-cystic fibrosis bronchiectasis (NCFBE) patients with chronic lung infection with Pseudomonas aeruginosa (P. aeruginosa).

In accordance with Article 8(3) and Annex I, Part II.7 of Directive 2001/83/EC, Aradigm is submitting a mixed MAA for Linhaliq that is based on the positive Phase 3 pivotal clinical trial ARD-3150-1202 (ORBIT-4) and supporting evidence from Phase 3 study ARD-3150-1201 (ORBIT-3) and Phase 2b study ARD-3150-0902 (ORBIT-2), together with other supporting evidence from proprietary preclinical and clinical studies, as well as referencing additional information about ciprofloxacin from publicly available sources.

The EMA has a 21-day validation review period to determine whether the MAA is complete before starting the procedure.

Additional Information about Linhaliq Phase 3 Trials and Regulatory Development

Linhaliq, formerly known as Pulmaquin®, is composed of a mixture of liposome encapsulated and unencapsulated ciprofloxacin. Ciprofloxacin, available in oral and intravenous formulations, is a widely prescribed antibiotic. It is used often to treat acute lung infections because of its broad-spectrum antibacterial activity against various bacteria, such as P. aeruginosa. There are currently no treatments approved for NCFBE patients to prevent and reduce the number of pulmonary exacerbations (PEs).

Linhaliq was evaluated in two Phase 3 studies (ORBIT-3 and ORBIT-4) to determine its safety and effectiveness as a once- a-day inhaled formulation for the chronic treatment of patients with NCFBE who have chronic lung infections with P. aeruginosa.

The Phase 3 clinical program for Linhaliq in NCFBE consisted of two worldwide, double-blind, placebo-controlled pivotal trials (ORBIT-3 and ORBIT-4) that were identical in design except for a pharmacokinetics sub-study that was conducted in one of the trials. Each trial enrolled NCFBE patients (278 in ORBIT-3 and 304 in ORBIT-4) into a 48-week double-blind period consisting of 6 cycles of 28 days on treatment with Linhaliq or placebo plus 28 days off treatment, followed by a 28 day open label extension in which all participants received Linhaliq (total treatment duration, including the double-blind period, of approximately one year). The superiority of Linhaliq vs. placebo during the double-blind period was evaluated in terms of the primary endpoint - time to first PE, while key secondary endpoints included the reduction in the number of PEs, the number of PEs requiring the administration of antibiotics, the number of severe PEs, as well as improvements in quality of life measures. Lung function was monitored as a safety indicator.

Aradigm discussed the results of the Phase 3 studies at pre-submission meetings with EMA in October and November 2017. Based on these discussions, the statistical analysis of the results was changed from the pre-specified plan to stratification based on sex and the frequency of pulmonary exacerbations in the prior year, as the stratum for current smokers contained a small number of subjects.

Top-line efficacy results for the two Phase 3 studies using the new stratification and pooled safety analyses are described below:

In ORBIT-4 the median time to first PE was 230 days in the Linhaliq treatment group as compared to 158 days in the placebo group. This increase of 72 days in the median time to first PE was statistically significant (p=0.0323) using stratified unweighted log-rank analysis. For the first secondary efficacy endpoint, there was a 37% reduction in the frequency of PEs over the 48-week treatment period in the Linhaliq treatment group as compared to the placebo group. This result was statistically significant (p=0.0006). In the secondary endpoints of frequency of PEs requiring the administration of antibiotics a statistically significant 42% reduction (p=0.0001), and of severe PEs a statistically significant 60% reduction (p=0.0031) was observed in the Linhaliq group compared with placebo.

In ORBIT-3 the median time to first PE was 214 days in the Linhaliq treatment group as compared to 136 days in the placebo group. This increase of 78 days in the median time to first PE was similar to ORBIT-4 but was not statistically significant (p=0.9743). For the first secondary efficacy endpoint, there was a 15% reduction in the frequency of PEs over the 48-week treatment period in the Linhaliq treatment group as compared to the placebo group but it was not statistically significant (p=0.2565). In the secondary endpoints of frequency of PEs requiring the administration of antibiotics a non-significant 22% reduction (p=0.0998), and of severe PEs a non-significant 20% reduction (p=0.4827) was observed in the Linhaliq group compared with placebo.

Neither trial demonstrated a statistically significant improvement for Linhaliq compared to placebo in the secondary endpoint, quality of life, when the difference in the Respiratory Domain score of the QoL-B questionnaire was examined between baseline and Week 48.

Both studies demonstrated a statistically significant reduction in P. aeruginosa density at Day 28, the end of the first on- treatment period (ORBIT-3: p= < 0.0001; ORBIT-4: p= < 0.0001). For each study, the magnitude of this antibiotic effect remained persistent throughout all on-treatment periods. Similarly, the Phase 2b trial ORBIT-2 met its primary efficacy endpoint of reduction of P. aeruginosa density at Day 28 (p=0.002).

Linhaliq was generally safe and well tolerated in both Phase 3 studies. For each Phase 3 study, the randomization rate of Linhaliq-treated subjects to placebo was 2 to 1. In the pooled safety analyses there were no significant differences in the changes of lung function (FEV1 % predicted and FVC % predicted) or symptoms of airway irritation between the Linhaliq and placebo groups in the two studies. Overall, the incidence of all treatment emergent adverse events ("TEAE") was similar between the Linhaliq and placebo groups (Linhaliq: 88.2%; placebo: 94.3%). The most frequently observed treatment- related TEAEs were respiratory/thoracic/mediastinal of nature and were reported by 20.8% of subjects with Linhaliq and in 20.7% of subjects with placebo. The rates of serious TEAEs were 23.4% with Linhaliq and 26.9% with placebo. During the double blind and open label course of both studies there were 7 deaths in the Linhaliq and 7 deaths in the placebo group. None of the deaths was considered related to Linhaliq or placebo by the investigators. There were no deaths in ORBIT-2.

Further information about the analyses of the Phase 3 results is presented at Aradigm's website www.aradigm.com.

About Non-Cystic Fibrosis Bronchiectasis

NCFBE is a severe, chronic and rare disease characterized by abnormal dilatation of the bronchi and bronchioles, frequently associated with chronic lung infections. It is often a consequence of a vicious cycle of inflammation, recurrent lung infections, and bronchial wall damage. NCFBE represents an unmet medical need with high morbidity and mortality that affects more than 150,000 people in the U.S. and over 200,000 people in Europe. There is currently no drug approved for the treatment of this condition. NCFBE patients who have chronic infections with P. aeruginosa have a 6.5-fold increase in hospitalization, three times higher mortality, and a worse quality of life compared with those without P. aeruginosa infections.

About Aradigm

Aradigm is an emerging specialty pharmaceutical company focused on the development and commercialization of drugs for the prevention and treatment of severe respiratory diseases. Aradigm has completed Phase 3 development of Linhaliq (an investigational proprietary formulation of ciprofloxacin for inhalation) for the treatment of NCFBE. Aradigm's inhaled ciprofloxacin formulations including Linhaliq are also product candidates for treatment of patients with cystic fibrosis and non-tuberculous mycobacteria, and for the prevention and treatment of high threat and bioterrorism infections, such as inhaled tularemia, pneumonic plague, melioidosis, Q fever and inhaled anthrax.

More information about Aradigm can be found at www.aradigm.com.

SOURCE: Aradigm

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