Santhera pharmaceuticals (switzerland) ltd

Santhera Pharmaceuticals Holding AG
Hammerstrasse 49
CH-4410 Liestal / Switzerland
Santhera’s MICONOS Trial with Catena®/Sovrima® in Friedreich’s
Ataxia Misses Primary Endpoint

Liestal, Switzerland, May 20, 2010 – Santhera Pharmaceuticals (SIX: SANN) announced today
that its MICONOS Phase III study evaluating Catena®/Sovrima® for the treatment of Frie-
dreich’s Ataxia missed its primary endpoint. Trends towards improvement in the key neuro-
logical endpoint were however identified by a meta-analysis of all Santhera’s Phase II and III
studies in the same indication. MICONOS also confirmed that Catena®/Sovrima® is safe and
well tolerated at doses of up to 2250 mg/day.

The 12-month MICONOS (Mitochondrial Protection with Idebenone In Cardiac Or Neurological Out-
come Study) study enrolled 232 primarily adult patients and evaluated the safety and efficacy of
three doses of Catena®/Sovrima® compared to that of placebo. Analysis of the primary endpoint of
the study, mean change in the International Cooperative Ataxia Rating Scale (ICARS) score from
baseline, did not detect any significant difference between the active dose arms and placebo. Sec-
ondary endpoints, including the proportion of patients improving on ICARS score (responder analy-
sis) and change in the Friedreich’s Ataxia Rating Scale also did not show statistically significant dif-
ferences between the placebo and active dose groups. Although a detailed analysis of cardiac end-
points is still ongoing, there was no difference between the active and placebo groups in the key
cardio logical secondary endpoint assessing a combination of anatomical and functional cardiac
A meta-analysis of Santhera’s three Phase II and III studies including 344 patients of all age groups
and disease stages showed trends for improvement on Catena®/Sovrima® in the mean change in
ICARS score in the combined mid- and high dose groups compared to placebo (p=0.083) as well as
in the high dose group compared to placebo (p=0.088). Similarly, a larger proportion of patients im-
proved by at least 2.5 ICARS points over a six months treatment period in the Catena®/Sovrima
dose groups (placebo: 30.4%; mid-dose group 39.1%; high dose group 41.9%) and comparison
with placebo showed a trend in favor of the combined mid and high dose groups (p=0.10) and the
high dose group (p=0.098).
The pharmacokinetic analyses of study participants revealed detectable levels of idebenone or its
metabolites in the blood of 12% of the patients in the placebo arm. With the exception of one, none
of these individuals declared prior use of idebenone before joining the MICONOS study.
Santhera’s MICONOS Trial with Catena®/Sovrima® in Friedreich’s Ataxia
Misses Primary Endpoint
At 17:00 CET / 16:00 UKT / 11:00 EST on May 20, 2010, Santhera’s management will host a tele-
conference/webcast. You can either join the webcast on or the tele-
using the conference ID 76973094 and one of the following dial-ins:
The webcast will be available for playback one hour after the analyst presentation ends. Thomas Meier, Chief Scientific Officer, commented: “We are surprised and disappointed by the MICONOS results. The outcome of the study represents a major set-back for us and the whole Frie-dreich’s Ataxia community. However, we now have results from three clinical studies which, when combined, show a trend for superiority of Catena®/Sovrima® compared to placebo as assessed by the ICARS. Before deciding on how to proceed with the development program, we will analyze the data from the two ongoing extension studies which will provide important long-term follow-up data on the use of the drug in Friedreich’s Ataxia patients. Considering the data from all three clinical studies, we are convinced that individual patients benefit from Catena®/Sovrima®, although we were not able to demonstrate this conclusively in this clinical trial of still limited size and duration. In this slowly and variably progressing neurological disorder, where patients experience daily fluctua-tions in their disease status, it remains a challenge to demonstrate changes in neurological func-tions in the short-term.” Klaus Schollmeier, Chief Executive Officer, commented: “The MICONOS results are an unexpected setback for us. However, we have a broad late-stage pipeline which includes three distinct mole-cules in seven indications and we have sufficient cash reserves to fund it. We remain optimistic about the medical and commercial potential of Catena®/Sovrima® and now wait for data from the long-term extension studies in Friedreich’s Ataxia, the RHODOS Phase II study in Leber’s Heredi-tary Optic Neuropathy which are due within the next few weeks as well as from the MELTIMI Phase II study in MELAS syndrome. Interim data from the DELOS Phase III study in Duchenne Muscular Dystrophy, which is based on a different mechanism of action, are also expected in the second half of this year.” Santhera’s late-stage pipeline includes Catena®/Sovrima® in four additional indications, fipamezole in Dyskinesia in Parkinson’s Disease currently prepared for Phase III development in the United States of America by partner Biovail, and omigapil in Congenital Muscular Dystrophy, which is in preparation for a Phase II/III study. All development programs cover a high unmet medical need and address substantial market opportunities in niche and orphan indications. About the MICONOS study
The MICONOS study was a randomized, double blind, placebo controlled trial testing the efficacy
and safety of three doses of Catena®/Sovrima® and placebo over a 12 months treatment period.
The doses tested were 180/360 mg/day (low dose for patients ≤ and >45 kg body weight),
450/900 mg/day (mid-dose) and 1350/2250 mg/day (high dose). Patients of all age groups and dis-
ease stages were enrolled into the study, which was initiated in December 2005 and conducted in
13 study centers in Europe.
Santhera’s MICONOS Trial with Catena®/Sovrima® in Friedreich’s Ataxia
Misses Primary Endpoint
About Friedreich’s Ataxia
Friedreich’s Ataxia is a devastating inherited disease associated with progressive neurodegenera-
tion. The disorder is caused by mutations in the gene that encodes for frataxin. Lack of this protein
impairs the energy production in the mitochondria, the energy production centers in each cell, and
damages nervous and cardiac tissue.
First symptoms typically develop from around 5 to 15 years of age. Coordination difficulties such as
unsteady gait, frequent falls or clumsiness usually appear first. Gait ataxia then spreads to the arms
and the trunk. Speech is almost always affected, making communication increasingly difficult. Pa-
tients become wheelchair-bound and require continuous care. Cardiomyopathy is a common com-
plication of Friedreich’s Ataxia and while it may be asymptomatic early on, it remains a leading
cause of death.
About Santhera
Santhera Pharmaceuticals (SIX: SANN) is a Swiss specialty pharmaceutical company focused on the development and commercialization of innovative pharmaceutical products for the treatment of severe neuromuscular diseases, an area of high unmet medical need which includes many orphan indications with no current therapy. Santhera’s first product, Catena® to treat Friedreich’s Ataxia, is marketed in Canada. The drug is also being investigated in a Phase III study in Duchenne Muscular Dystrophy for which commercial rights in Europe are licensed to Takeda Pharmaceutical. Santhera’s second compound fipamezole recently showed efficacy in reducing levodopa-induced Dyskinesia in Parkinson’s Disease. Phase III development and commercialization rights in the Unit-ed States and Canada are partnered with Biovail. For further information, please visit the Com-pany’s web site Catena® is a trademark of Santhera Pharmaceuticals. For further information, contact
Klaus Schollmeier, Chief Executive Officer
Phone: +41 (0)61 906 89 52
[email protected]
Barbara Heller, Chief Financial Officer
Phone: +41 (0)61 906 89 54
[email protected]
Thomas Staffelbach, Head Public & Investor Relations
Phone: +41 (0)61 906 89 47
[email protected]
Santhera’s MICONOS Trial with Catena®/Sovrima® in Friedreich’s Ataxia
Misses Primary Endpoint
Disclaimer/Forward-looking statements
This communication does not constitute an offer or invitation to subscribe for or purchase any secu-
rities of Santhera Pharmaceuticals Holding AG. This publication may contain certain forward-looking
statements concerning the Company and its business. Such statements involve certain risks, un-
certainties and other factors which could cause the actual results, financial condition, performance
or achievements of the Company to be materially different from those expressed or implied by such
statements. Readers should therefore not place undue reliance on these statements, particularly
not in connection with any contract or investment decision. The Company disclaims any obligation
to update these forward-looking statements.


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