AMG 181 in Subjects With Moderate to Severe Crohn's Disease



Status:Completed
Conditions:Gastrointestinal, Crohns Disease
Therapuetic Areas:Gastroenterology
Healthy:No
Age Range:18 - 65
Updated:8/8/2018
Start Date:December 4, 2012
End Date:April 10, 2018

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A Randomized, Double-blind, Placebo-controlled Study to Evaluate the Safety, Tolerability, and Efficacy of AMG 181 in Subjects With Moderate to Severe Crohn's Disease

This is a randomized, double-blind, placebo-controlled, parallel group, multiple dose study
to evaluate the efficacy of AMG 181 compared with placebo as measured by the proportion of
subjects in remission (CDAI score < 150) at week 8 (primary endpoint). After completing all
screening assessments and meeting all eligibility criteria, subjects will be randomized to
receive placebo or AMG 181 at various doses per protocol. A maximum of approximately 80% of
subjects with any prior anti-TNF agent use will be allowed in the study. At the end of the
double blind period, subjects will enter an open-label period during which all subjects will
receive open-label AMG 181 at a single dose level according to protocol. Subjects who fail to
achieve minimal improvement, or experience disease worsening after initial response are
eligible to enter the open-label period early beginning at week 12 or after. Subjects that
complete the open-label period or early terminate from the study will enter the 2 year safety
follow up period.

Title: A Randomized, Double-blind, Placebo-controlled Study to Evaluate the Safety,
Tolerability, and Efficacy of AMG 181 in Subjects with Moderate to Severe Crohn's Disease
Study Phase: 2 Indication: Crohn's Disease (CD) Primary Endpoint: Remission at week 8, as
defined by a CDAI score of < 150 Key Secondary Endpoints: Response at week 8 or week 12, as
defined by either remission or a CDAI reduction from baseline of > 100 • Remission at week
12, as defined by a CDAI score of < 150 Other Secondary Endpoints: • Sustained remission,
defined as achieving the criteria for remission at week 8 or 12 and week 24 • Change from
baseline in CDAI score at week 8 or week 12 Safety Endpoints: • Adverse events • Serious
adverse events • Significant changes in laboratory values and vital signs • Anti-AMG 181
antibodies Sample Size: 252 Summary of Subject Eligibility Criteria: Subjects must have a
diagnosis of ileal, ileo-colonic, or colonic Crohn's disease for a minimum of 6 months prior
to baseline, with moderate to severe disease activity at baseline defined as a CDAI score ≥
220 and ≤ 450. Subjects must have demonstrated an inadequate response to, loss of response
to, or intolerance to immunomodulators and/or anti-TNF agents or to corticosteroids (non-US
sites only). Subjects may continue on stable doses of protocol specified medications to treat
CD. Subjects must have a neurological exam free of clinically significant, unexplained signs
and symptoms at screening and no clinically significant change prior to randomization. In
addition, subjects must be free of significant concurrent medical conditions at study entry.
If applicable, female subjects must be willing to use two highly effective methods of birth
control or one highly effective method and one effective method of birth control during the
study. Amgen Investigational Product Dosage and Administration: Investigational Product will
be administered subcutaneously (SC). During the 24-week double-blind placebo-controlled
period, subjects will be randomized to receive either placebo or a selected dose of AMG181
per protocol using repeated injections until week 24. During the open-label period, all
subjects will receive AMG 181 per protocol using repeated injections.

Control Group: The double-blind period (first 24 weeks) will be controlled. During this
period, the control group will receive placebo

Inclusion Criteria:

Diagnosed with ileal, ileo-colonic, or colonic Crohn's disease for a minimum of 6 months
prior to initiating Study Product Moderately to severely active Crohn's disease, as defined
by a CDAI score > 220 and <450 at baseline Evidence of active inflammation within 12 weeks
prior to baseline Demonstrated an inadequate response to, loss of response to, or
intolerance to at least one of the following agents: Immunomodulators and/or Anti-TNF
agents or to corticosteroids (non-US sites only).

Neurological exam free of clinically significant, unexplained signs or symptoms during
screening and no clinically significant change prior to randomization Subject has no known
history of active tuberculosis and has a negative test for tuberculosis during screening

Exclusion Criteria:

Short bowel syndrome Stricture with obstructive symptoms within 3 months Bowel surgery
within 12 weeks prior baseline, or has planned bowel surgery within 24 weeks from baseline
Ileostomy and/or colostomy Any gastric or intestinal pouch Evidence of an infected abscess
Bowel perforation or evidence of noninflammatory obstruction during the 6 months Stool
positive for C. difficile toxin at screening Any uncontrolled or clinically significant
systemic disease Known to have tested positive for hepatitis B virus surface antigen,
hepatitis C virus antibody, or HIV Any underlying condition that predisposes subject to
infections Subject has malignancy (other than resected cutaneous basal or cutaneous
squamous cell carcinoma, or treated in situ cervical cancer considered cured) within 5
years of baseline Received an anti-TNF agent, cyclosporine, mycophenolate mofetil,
sirolimus (rapamycin), thalidomide, tacrolimus, topical (rectal) aminosalicylic acid (eg,
mesalamine) or topical (rectal) steroids, intravenous or intramuscular corticosteroids
within protocol-specified time periods.

Any prior exposure to antagonists of integrins or integrin ligands (eg, natalizumab,
efalizumab, or vedolizumab), rituximab, or TNF kinoid immunotherapies, AMG 181, or any form
of cell-based transplantation Received treatment of infection with intravenous (within 30
days of baseline) or oral (within 14 days prior to baseline) antibiotics, antivirals, or
antifungals Significant Laboratory abnormalities Pregnant or breast feeding
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