Santhera reported positive results today from Catena®/Raxone® in their Phase III Duchenne trial. These results are supported by additional respiratory function data. By including pulmonary outcomes in a study like this, we hope other companies are encouraged to include adult (non-ambulant) patients in their clinical trials. Ideally this would lead to broad labels and indications that enable every patient access.
May 22, 2014: Santhera Reports Positive Outcome for Catena®/Raxone® in Phase III DMD Trial Supported by Additional Respiratory Function Data
Liestal, Switzerland, May 22, 2014 - Santhera Pharmaceuticals (SIX: SANN) today reported that the results of secondary respiratory function endpoints from the on-going analysis of the DELOS trial in Duchenne Muscular Dystrophy (DMD) corroborate the positive outcome for the primary endpoint. These data provide further supportive evidence of a treatment benefit for Catena®/Raxone® in DMD.
As previously announced, the DELOS trial met the primary endpoint, the difference between Catena®/Raxone® and placebo in the change from baseline to week 52 in Peak Expiratory Flow (PEF as percent predicted, PEF%p). Hospital-based spirometry assessments demonstrated that Catena®/Raxone® significantly reduced the annual decline in PEF%p by 66% compared to patients taking placebo. The average annual decline in PEF%p was 9.0% for placebo (Baseline: 54.3%; Week 52: 45.3% (n=27), p<0.001) versus 3.1% for Catena®/Raxone®(Baseline PEF%P: 53.1%; Week 52: 50.1% (n=30); p=0.13) for a treatment group difference in change from Baseline to Week 52 of 5.96% (p=0.04).
Santhera today announced that this finding has been corroborated by the results of secondary endpoints assessing respiratory function in all randomized and treated subjects. When measured weekly by the patient at home using the hand-held ASMA-1 device (secondary endpoint), Catena®/Raxone® significantly reduced the annual decline in PEF%p by 80% compared to patients taking placebo. The ASMA-1 device showed a significant 9.0% decline in PEF%p occurred between Baseline and Week 52 in the placebo group (n=31; p<0.001), compared to a non-significant decline of 1.8% in the Catena®/Raxone® group (n=31; p=0.44), for a treatment group difference in change from Baseline to Week 52 of 7.2% (p=0.03).
Furthermore, for Forced Expiratory Volume in 1 second (as percent predicted, FEV1%p), an additional endpoint for respiratory muscle strength, Catena®/Raxone® significantly reduced the annual decline by 78% compared to patients taking placebo. The annual decline in FEV1%p in the placebo group was 10.7% compared to 2.4% in the Catena®/Raxone® group (p=0.03).
Importantly, the outcome for Forced Vital Capacity (as percent predicted, FVC%p), a measure of restrictive lung disease predictive of morbidity and mortality in DMD, also supported a treatment benefit of Catena®/Raxone®. The annual decline in FVC%p was reduced by 37% in Catena®/Raxone®-treated patients (9.0% decline in FVC%p in the placebo group versus a 5.7% decline in the Catena/Raxone group; p=0.08).
No differences were observed between treatment groups in Maximal Inspiratory or Expiratory Pressures or in Peak Cough Flow.
In summary these outcomes provide clear evidence of a clinical benefit for Catena®/Raxone® in delaying the loss of respiratory function in patients with DMD compared to placebo.
As also reported previously, treatment with Catena®/Raxone® was safe and well tolerated. A total of 93.8% of Catena®/Raxone®-treated and 94.1% of placebo-treated patients experienced at least one Adverse Event (AE). Serious AEs were reported in 6.3% of Catena®/Raxone®treated and in 14.7% of placebo-treated patients. Nasopharyngitis (25.8%) and headache (19.7%) were the most common adverse events but there were no differences in the incidence of these events between the treatment groups. Diarrhoea was slightly more commonly observed in Catena®/Raxone®-treated patients (25.0% versus 11.8%), whilst upper respiratory tract infections were more frequently observed in placebo-treated patients (17.6% versus 6.3%). Overall adverse events were mild to moderate in intensity.
"We are very excited to observe this treatment benefit for Catena®/Raxone® in delaying respiratory deterioration in DMD, as evidenced by the significant outcome for the primary PEF endpoint in DELOS. The positive results of secondary outcomes, in addition to the primary endpoint, are clearly supportive and establish the clinical meaningfulness of Catena®/Raxone®treatment. This is of critical importance for the demonstration of substantial evidence of effectiveness in the regulatory process", explained Nick Coppard, SVP Development at Santhera. "Having demonstrated a significant and clinically relevant benefit without safety concerns, we believe we are well positioned to discuss regulatory approval with the authorities".
These data are presented today at the Bio€quity Europe 2014 Conference in Amsterdam and will be available for download on the Company's website www.santhera.com underInvestors/Presentations.