Amgen Presents Pooled Analysis Showing AMG 145 Significantly Reduced LDL Cholesterol In Over 1,200 Patients

   Amgen Presents Pooled Analysis Showing AMG 145 Significantly Reduced LDL
                      Cholesterol In Over 1,200 Patients

Pooled Data from Four Phase 2 Studies Demonstrated Consistent Reductions in
LDL Cholesterol of Up to 59 Percent

Results of Analyses Presented at ESC Congress 2013

PR Newswire

THOUSAND OAKS, Calif., Aug. 31, 2013

THOUSAND OAKS, Calif., Aug. 31, 2013 /PRNewswire/ -- Amgen (NASDAQ: AMGN)
today announced treatment with AMG 145 resulted in significant reductions in
low-density lipoprotein cholesterol (LDL-C), or "bad" cholesterol, of up to 59
percent in an efficacy analysis of pooled data from four 12-week Phase 2
studies evaluating AMG 145 in patient populations with high cholesterol. AMG
145 is an investigational human monoclonal antibody that inhibits PCSK9, a
protein that reduces the liver's ability to remove LDL-C from the blood. Amgen
presented the data at the ESC Congress 2013, organized by the European Society
of Cardiology, in Amsterdam.

Elevated LDL-C is recognized as a major risk factor for cardiovascular (CV)
disease.^1,2 Despite the availability of various treatments to lower LDL-C, it
is estimated that in two-thirds of treated, high-risk patients, LDL-C is not
well-controlled.^3,4

"Millions of people around the world are unable to control their LDL
cholesterol with currently available treatment options," said Sean E. Harper,
M.D., executive vice president of Research and Development at Amgen. "The data
that we have accumulated in our Phase 2 clinical program is evidence that AMG
145 has the potential to help patients reach their cholesterol goals. We are
conducting a large and comprehensive Phase 3 clinical program evaluating AMG
145 in multiple patient populations and utilizing two dosing schedules, with
the hopes of advancing care and improving the lives of patients with
uncontrolled high LDL cholesterol."

Results from the efficacy analysis showed mean reductions in LDL-C from
baseline to week 12, as measured by preparative ultracentrifugation, ranged
from 40 to 59 percent across AMG 145 doses in comparison to 0.1 to 0.5 percent
for placebo (p=0.001). AMG 145 treatment was also associated with improvements
in other lipid parameters, including high-density lipoprotein cholesterol
(HDL-C), triglycerides, apolipoprotein B, lipoprotein(a) and apolipoprotein
A1, within each targeted dose frequency of AMG 145.

In the safety analysis, adverse events (AEs) were observed more frequently
with AMG 145 than placebo (57 percent vs. 49 percent) with the most frequent
AEs being nasopharyngitis (8.3 percent vs. 7.5 percent) and upper respiratory
tract infection (4.1 percent vs. 3.3 percent). Serious AEs were 2.0 percent
with AMG 145 and 1.2 percent with placebo. The rates of injection-site
reactions were similar between patients treated with AMG 145 and those treated
with placebo (4.1 percent vs. 3.3 percent) while muscle-related AEs and
anti-drug binding antibodies were 6.0 percent vs. 3.9 percent and 0.1 percent
vs. 0.3 percent, respectively.

About the Pooled Analyses
The pre-specified, pooled analyses of data were from four Phase 2,
placebo-controlled, randomized trials of AMG 145 in various patient
populations with hyperlipidemia. In each trial, treatment duration was 12
weeks and the primary endpoint was percentage change in LDL-C from baseline,
as measured by ultracentrifugation. Patients enrolled in the trials received
various doses of AMG 145 subcutaneously every two weeks or monthly. Three of
the four trials permitted stable background statin therapy. The trials
included:

– MENDEL (Monoclonal Antibody Against PCSK9 to Reduce Elevated LDL-C in
Patients Currently Not Receiving Drug Therapy for Easing Lipid Levels)
evaluated the efficacy, safety and tolerability of AMG 145 administered
subcutaneously every two weeks and every four weeks in hyperlipidemic patients
(LDL-C ³ 100 mg/dL and < 190 mg/dL) who were not receiving statin therapy.

– LAPLACE-TIMI 57 (LDL-C Assessment with PCSK9 MonoclonaL Antibody Inhibition
Combined With Statin ThErapy – Thrombolysis In Myocardial Infarction-57)
evaluated the efficacy, safety and tolerability of AMG 145 administered
subcutaneously every two weeks and every four weeks in hyperlipidemic patients
at risk for CV disease (LDL-C > 85 mg/dL) when added to a stable dose of
statin, with or without ezetimibe.

– RUTHERFORD (RedUction of LDL-C With PCSK9 InhibiTion in HEteRozygous
Familial HyperchOlesteRolemia Disorder Study) evaluated AMG 145 administered
subcutaneously every month, in heterozygous familial hypercholesterolemic
patients with an LDL-C >100 mg/dL who were on a stable dose of statin, with or
without ezetimibe.

– GAUSS (Goal Achievement After Utilizing an anti-PCSK9 Antibody in Statin
Intolerant Subjects) evaluated the efficacy, safety and tolerability of AMG
145 dosed subcutaneously every month, in hyperlipidemic patients who could not
tolerate effective statin doses due to muscle-related side effects.^

About AMG 145
AMG 145 is a human monoclonal antibody that inhibits proprotein convertase
subtilisin/kexin type 9 (PCSK9). PCSK9 is a protein that targets LDL receptors
for degradation and thereby reduces the liver's ability to remove LDL-C, or
"bad" cholesterol, from the blood.^5 AMG 145, being developed by Amgen
scientists, is designed to bind to PCSK9 and inhibit PCSK9 from binding to LDL
receptors on the liver surface. In the absence of PCSK9, there are more LDL
receptors on the surface of the liver to remove LDL-C from the blood.^6

About the AMG 145 Clinical Trial Program
PROFICIO, which stands for the Program to Reduce LDL-C and Cardiovascular
Outcomes Following Inhibition of PCSK9 In Different POpulations, is the large
and comprehensive clinical trial program evaluating AMG 145.

The Phase 3 clinical trial program for AMG 145 builds upon the successful
Phase 2 studies and includes 12 trials, with a combined planned enrollment of
more than 27,000 patients. The Phase 3 studies will evaluate AMG 145
administered every two weeks and monthly in multiple patient populations,
including in combination with statins in patients with hyperlipidemia
(LAPLACE-2), in patients with hyperlipidemia who cannot tolerate statins
(GAUSS-2), as a stand-alone treatment in patients with hyperlipidemia
(MENDEL-2), and in patients whose elevated cholesterol is caused by genetic
disorders called heterozygous (RUTHERFORD-2) and homozygous (TESLA and
TAUSSIG) familial hypercholesterolemia. ^

Five studies of AMG 145 will provide long-term safety and efficacy data,
including the FOURIER (Further Cardiovascular OUtcomes Research with PCSK9
Inhibition in
Subjects with Elevated Risk) study, which will assess whether treatment with
AMG 145 compared to placebo reduces recurrent cardiovascular events in
approximately 22,500 patients with cardiovascular disease. ^

Additional information about clinical trials of AMG 145 can be found at
www.clinicaltrials.gov.

About Amgen
Amgen is committed to unlocking the potential of biology for patients
suffering from serious illnesses by discovering, developing, manufacturing and
delivering innovative human therapeutics. This approach begins by using tools
like advanced human genetics to unravel the complexities of disease and
understand the fundamentals of human biology.

Amgen focuses on areas of high unmet medical need and leverages its biologics
manufacturing expertise to strive for solutions that improve health outcomes
and dramatically improve people's lives. A biotechnology pioneer since 1980,
Amgen has grown to be the world's largest independent biotechnology company,
has reached millions of patients around the world and is developing a pipeline
of medicines with breakaway potential.

For more information, visit www.amgen.com and follow us on
www.twitter.com/amgen.

Forward-Looking Statements
This news release contains forward-looking statements that are based on
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CONTACT: Amgen, Thousand Oaks
Ashleigh Koss, 805-559-0746 (media)
Arvind Sood, 805-447-1060 (investors)

^1. American Heart Association (2012). Why cholesterol matters.
http://www.heart.org/HEARTORG/Conditions/Cholesterol/WhyCholesterolMatters/Why-Cholesterol-Matters_UCM_001212_Article.jsp.Accessed
August 2013
^2. World Health Organization. Global status report on noncommunicable
diseases 2010. Geneva, 2011.
^3. Roger V et al. Heart disease and stroke statistics – 2011 update: A
report from the American Heart Association. Circulation.2011;123:e18-e209.
^4. Durrington P. Dyslipidaemia.The Lancet.2003;362:717–311.
^5. Abifadel M et al. Mutations inPCSK9cause autosomal dominant
hypercholesterolemia. Nat Genet 2003;34:154- 156.
^6. Amgen data on file, Investigator Brochure.

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