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Safety & Efficacy Study Evaluating the Combination of Bevasiranib & Lucentis Therapy in Wet AMD (COBALT)

This study has been terminated.
Information provided by (Responsible Party):
OPKO Health, Inc. Identifier:
First received: July 10, 2007
Last updated: September 29, 2014
Last verified: September 2014
The purpose of this study is to compare the safety and effectiveness of bevasiranib given either every 8 weeks or every 12 weeks after an initial pre-treatment with 3 injections of Lucentis® (ranibizumab injection) compared to Lucentis® given every 4 weeks to people with wet AMD. Patients will be assigned at random (like tossing a coin) to receive one of three treatments options for 104 weeks.

Condition Intervention Phase
Macular Degeneration
Drug: bevasiranib
Drug: ranibizumab
Phase 3

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double Blind (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Treatment
Official Title: A Phase 3, Randomized, Double-masked, Parallel-assignment Study of Intravitreal Bevasiranib Sodium, Administered Every 8 or 12 Weeks as Maintenance Therapy Following Three Injections of Lucentis® Compared With Lucentis® Monotherapy Every 4 Weeks in Patients With Exudative Age-Related Macular Degeneration (AMD).

Resource links provided by NLM:

Further study details as provided by OPKO Health, Inc.:

Primary Outcome Measures:
  • Visual Acuity [ Time Frame: week 60 ]
    avoidance of 3 or more lines of vision loss

Secondary Outcome Measures:
  • Need for Rescue Therapy, Time to Rescue Therapy, and Number of Patients With a 3 or More Line Gain in Vision [ Time Frame: Week 60 ]

Enrollment: 338
Study Start Date: August 2007
Study Completion Date: May 2009
Primary Completion Date: March 2009 (Final data collection date for primary outcome measure)
Arms Assigned Interventions
Active Comparator: A
Lucentis® (0.5mg) every 4 weeks.
Drug: ranibizumab
Lucentis® (0.5 mg)administered intravitreally every 4 weeks.
Other Name: Lucentis®
Experimental: B
Bevasiranib (2.5mg) every 8 weeks beginning at week 12, after pre-treatment with 3 injections of Lucentis® and initial priming doses of bevasiranib at weeks 2 & 6.
Drug: bevasiranib
Bevasiranib (2.5mg) administered intravitreally every 8 or 12 weeks
Experimental: C
Bevasiranib (2.5mg) every 12 weeks beginning at week 12, after pre-treatment with 3 injections of Lucentis® and initial priming doses of bevasiranib at weeks 2 & 6.
Drug: bevasiranib
Bevasiranib (2.5mg) administered intravitreally every 8 or 12 weeks


Ages Eligible for Study:   50 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  1. Patients must be age 50 years or older
  2. Patients must have predominantly classic, minimally classic or occult with no classic lesions secondary to Age Related Macular Degeneration.
  3. The study eye must have ETDRS best corrected visual acuity of 69 to 24 letters (20/40 to 20/320 Snellen equivalent).
  4. Patients must be willing and able to return for scheduled monthly follow-up visits for two-years.

Exclusion Criteria:

  1. Prior pharmacologic treatment for AMD in the study (patients can not have previously received Avastin®/Lucentis®, Macugen®, or any other anti-VEGF agents, steroid treatments, PDT, radiation treatment, or any experimental therapies for AMD in the study eye)
  2. Any intraocular surgery of the study eye within 12 weeks of screening
  3. Previous posterior vitrectomy of the study eye
  4. Advanced glaucoma or intraocular pressure above 22 mm Hg in the study eye despite treatment.
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT00499590

  Show 60 Study Locations
Sponsors and Collaborators
OPKO Health, Inc.
Study Director: Denis O'Shaughnessy, Ph.D. Senior VP of Clincial Development
  More Information

Responsible Party: OPKO Health, Inc. Identifier: NCT00499590     History of Changes
Other Study ID Numbers: ACU301
Study First Received: July 10, 2007
Results First Received: September 25, 2014
Last Updated: September 29, 2014

Keywords provided by OPKO Health, Inc.:
Macular Degeneration
COBALT study
age related macular degeneration
wet AMD
wet age related macular degeneration

Additional relevant MeSH terms:
Macular Degeneration
Retinal Degeneration
Retinal Diseases
Eye Diseases
Immunologic Factors
Physiological Effects of Drugs
Angiogenesis Inhibitors
Angiogenesis Modulating Agents
Growth Substances
Growth Inhibitors
Antineoplastic Agents processed this record on May 25, 2017