Biogen Idec and Sobi announce positive top-line efficacy and safety results from phase-3 paediatric study of investigational therapy Eloctate(TM) (rFVIIIFc) for haemophilia A

- Data showed twice-weekly prophylactic dosing with Eloctate maintained low
bleeding rates in children under age 12-

- Study meets primary objectives; Results enable regulatory submission in EU-

Biogen Idec (NASDAQ: BIIB) and Swedish Orphan Biovitrum AB (publ) (Sobi) (STO:
SOBI) today released positive top-line results of the Kids A-LONG Phase 3
clinical study that evaluated the safety and efficacy of Eloctate((TM)), an
investigational recombinant factor VIII Fc fusion protein product candidate, in
children with severe haemophilia A. Eloctate was generally well-tolerated and no
inhibitors (neutralising antibodies that may interfere with the activity of the
therapy) were detected. Efficacy analyses showed twice-weekly prophylactic
dosing with Eloctate maintained low bleeding rates in children.

Kids A-LONG is the first study to evaluate a long-lasting, investigational
haemophilia therapy in children under 12 years old. Eloctate was developed using
a process called Fc fusion and is designed to prolong the circulation of infused
clotting factor in the body. The successful completion of this study will
support applications for paediatric indications globally and is an important
step to obtaining marketing authorisation in Europe. The European Medicines
Agency requires the inclusion of paediatric study data in a marketing
application for a new haemophilia therapy.

"Prophylactic treatment is recommended for children with severe haemophilia due
to its proven health benefits. However, current prophylactic injection schedules
are challenging for many children with haemophilia A and their parents," said
Glenn Pierce, M.D., Ph.D., senior vice president of Hematology, Cell and Gene
Therapies at Biogen Idec. "The results of this study support the potential for
Eloctate to address a significant need for children with haemophilia A by
providing prolonged intervals between scheduled prophylactic injections to
protect against bleeding episodes."

Kids A-LONG investigated the safety, efficacy and pharmacokinetics (measurement
of the presence of the drug in a person's body over time) of Eloctate in
previously treated children under 12 years old with severe haemophilia A. The
primary endpoint of the study was to evaluate the frequency of inhibitor
(neutralising antibody) development and none were detected. Secondary endpoints
included the overall and spontaneous annualised bleeding rates (ABR), or
projected number of yearly bleeding episodes, and the number of injections used
to prevent and treat bleeding episodes.

In the study, the relative increase in half-life in children with severe
haemophilia A was consistent with the 1.5-fold increase in half-life seen in the
A-LONG study of adults and adolescents. Children treated prophylactically with
Eloctate had an overall median ABR of 2.0 and a median ABR for spontaneous
bleeds of 0.0. Forty-six per cent of participants in the study experienced zero
bleeding episodes. Overall, ninety three per cent of bleeding episodes were
controlled by one to two injections of Eloctate. Additional analyses of the Kids
A-LONG study are ongoing, and the companies plan to present detailed results at
a future scientific meeting.

 "Sobi and Biogen Idec recognise the importance of advancing treatment options
for adults and children with haemophilia," said Birgitte Volck, M.D., Ph.D.,
senior vice president development and chief medical officer of Sobi. "The
successful completion of the Kids A-LONG study in children under 12 years old is
an important step to bringing this potential new treatment option to adults and
children with haemophilia A and a milestone that will enable regulatory
submission in Europe."



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About Kids A-LONG

Kids A-LONG was a global, open-label, multi-centre Phase 3 study involving 71
boys with severe haemophilia A (factor VIII activity less than 1 IU per dL, or
1 per cent) with at least 50 prior exposure days to factor VIII therapies. The
study was conducted at 23 haemophilia treatment centres in eight countries.
Overall, 67 participants (94 per cent) completed the study (33 under six years
old and 34 six to 11 years old). The average time participants spent in the
study was 25 weeks and 61 participants received Eloctate injections on at least
50 separate days (exposure days) to assess inhibitor development.

All study participants were to be initially treated with twice-weekly
prophylactic injections of Eloctate (25 IU/kg day 1, 50 IU/kg day 4). Study
investigators could adjust the dose or interval based on individual response.
Approximately ninety per cent of study participants were on twice-weekly dosing
at the end of the study.

Eloctate was generally well-tolerated. No inhibitors to Eloctate were detected
and no cases of serious allergic reactions were reported in any participants,
all of whom switched from commercially available factor VIII products. No
serious adverse events were assessed to be related to drug by the investigator.
Two non-serious events, rash and myalgia (muscle pain), were considered related
to Eloctate treatment and were reported in one participant each. No participant
discontinued the study due to an adverse event after receiving Eloctate. The
pattern of treatment-emergent adverse events reported was typical of the
population studied and generally consistent with results seen in adolescents and
adults in the A-LONG study.



About Eloctate

Eloctate is an investigational, recombinant clotting factor therapy developed
for haemophilia A by fusing factor VIII to the Fc portion of immunoglobulin G
subclass 1, or IgG(1) (a protein commonly found in the body). It is believed
that this enables Eloctate to use a naturally occurring pathway to prolong the
time therapy remains in the body. While Fc fusion has been used for more than
15 years, Biogen Idec is the only company to apply it to the treatment of
haemophilia.

Regulatory applications for Eloctate approval are currently under review in
several countries including the United States, Australia, Canada and Japan.



About Haemophilia A

Haemophilia A is a rare, chronic, genetic disorder in which the ability of a
person's blood to clot is impaired, due to missing or reduced levels of a
protein known as factor VIII. People with haemophilia A experience recurrent and
extended bleeding episodes that cause pain and irreversible joint damage. Some
of these bleeding episodes can be life-threatening. According to the World
Federation of Hemophilia, an estimated 142,000 people worldwide are identified
living with haemophilia A.[1] Prophylactic injections of factor VIII can
temporarily replace the clotting factor necessary to control bleeding and
prevent new bleeding episodes.

Inhibitor development is a response of the body's immune system that interferes
with the activity of therapy. About 25 to 30 per cent of people with severe
haemophilia A develop inhibitors during their lifetime. Inhibitors typically
develop after a median of 8-10 exposure days (EDs), though this number varies
widely.[2]



About the Biogen Idec and Sobi Collaboration

Biogen Idec and Swedish Orphan Biovitrum (Sobi) are partners in the development
and commercialisation of Eloctate for haemophilia A. Biogen Idec leads
development, has manufacturing rights, and has commercialisation rights in North
America and all other regions in the world excluding the Sobi territory. Sobi
has the right to opt in to assume final development and commercialisation in
Europe, Russia, the Middle East and Northern Africa.



About Biogen Idec

Through cutting-edge science and medicine, Biogen Idec discovers, develops and
delivers to patients worldwide innovative therapies for the treatment of
neurodegenerative diseases, haemophilia and autoimmune disorders. Founded in
1978, Biogen Idec is the world's oldest independent biotechnology company.
Patients worldwide benefit from its leading multiple sclerosis therapies. For
product labelling, press releases and additional information about the company,
please visit www.biogenidec.com.



About Sobi

Sobi is an international specialty healthcare company dedicated to rare
diseases. Our mission is to develop and deliver innovative therapies and
services to improve the lives of patients. The product portfolio is primarily
focused on Inflammation and Genetic diseases, with three late stage biological
development projects within Haemophilia and Neonatology. We also market a
portfolio of specialty and rare disease products for partner companies. Sobi is
a pioneer in biotechnology with world-class capabilities in protein biochemistry
and biologics manufacturing. In 2013, Sobi had total revenues of SEK 2.2 billion
(€253 M) and about 550 employees. The share (STO: SOBI) is listed on NASDAQ OMX
Stockholm. More information is available at www.sobi.com.



For more information please contact

Sobi

Media Contact:                                  Investor Relations contact:
Oskar Bosson                                  Jörgen Winroth
T: +46 70 410 71 80                        T: +1 347-224-0819, +1 212-579-0506,
                                                            +46 8 697 2135
oskar.bosson@sobi.com             jorgen.winroth@sobi.com

Biogen Idec

Media Contact:                                    Investor Relations Contact:
Lee-Ann Murphy                                  Ben Strain
+1-781-464-3260                               +1-781-464-2442
public.affairs@biogenidec.com     IR@biogenidec.com



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[1] World Federation of Hemophilia. Annual Global Survey 2012.
http://www1.wfh.org/publications/files/pdf-1574.pdf. Accessed January 28, 2014.

[2] Mariani G, Konkle BA, Kessler CM. Inhibitors in Hemophilia A and B. In:
Hoffman R, ed. Hematology : basic principles and practice. 6th ed. Philadelphia,
PA: Saunders/Elsevier; 2013:1961-1970.


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