News | April 07, 2011

New Anticoagulation Agent Shows Positive Results in Clinical Trial

April 7, 2011 – Primary results from the RADAR Phase 2b clinical trial were announced at the American College of Cardiology (ACC) 2011 60th Annual Scientific Session. The trial looked at Regado Bioscience’s Reg1 anticoagulation system.

Reg1 is a two-component system consisting of pegnivacogin, a highly selective Factor IXa (FIXa) inhibitor and anivamersen, its complementary specific active control agent.

The presentation was made by Thomas J. Povsic, M.D., Ph.D., assistant professor of medicine at Duke University .

Reg1, consists of two parenteral agents both administered by IV bolus, the first being a potent highly selective Factor IXa inhibitor (pegnivacogin, a.k.a. RB006) and the second being its complementary active control agent (anivamersen, a.k.a. RB007). Anivamersen can be used to selectively completely or partially reverse the anticoagulant effect of pegnivacogin. It is intended for application in arterial thrombosis indications, such as acute coronary syndrome patients undergoing percutaneous coronary intervention (PCI).

The trial was conducted in subjects admitted for ACS-unstable angina and myocardial infarction without ST-segment elevation (UA/NSTEMI) intended for cardiac catheterization within 24 hours. The objectives were to verify that 1 mg/kg of pegnivacogin resulted in near complete FIXa inhibition; to determine the dose of anivamersen which, when followed by immediate arterial sheath removal, results in a bleeding rate lower than heparin; and to assess the efficacy of REG1 (based on ischemic event rates) as an anticoagulant system in an invasively managed ACS population. The primary endpoint of the study was ACUITY bleeding (major and minor) at 30 days. A secondary endpoint was a composite of death, myocardial infarction (MI), urgent target vessel revascularization (TVR) or recurrent ischemia at 30 days.

Previously presented data from RADAR (AHA, November 2010) confirmed that pegnivacogin dosed at 1mg/kg reproducibly resulted in near complete inhibition of FIXa in an ACS population. The latest results showed that ACUITY major bleeding following immediate sheath removal exhibited a dose response with bleeding rates decreasing with increasing levels of reversal. Rates of bleeding were lower in the 75 percent and 100 percent reversal arms than heparin. In addition, the incidence of ischemic events was lower in REG1 treated patients compared with those treated with heparin.

Adverse events (AEs) other than bleeding and ischemic events were rare and evenly distributed among the arms of the study. Three patients, clustered late in the trial and in Europe, had allergic-like reactions shortly after receiving pegnivacogin. Characterization of these reactions is ongoing.

“The Phase 2b RADAR results suggest that high intensity FIXa inhibition with active control may ultimately represent a potential treatment option for addressing both ischemic and bleeding endpoints for patients who require short term anticoagulation in acute care settings,” said John H. Alexander, M.D., MHS, FACC of the Duke Clinical Research Institute (DCRI) at Duke University Medical Center and chair of the steering committee for the study. “For the first time, we’ve shown that active control of anticoagulation is possible; the hypothesis that this may lead to better ischemic and bleeding outcomes will no doubt be a focus of the REG1 Phase 3 development program.”

”Developing a technology that can selectively control anticoagulation has been considered the ‘holy grail’ for cardiac intervention,” said Roxana Mehran, M.D., professor of medicine and director of interventional cardiovascular research and clinical trials at the Zena and Michael A. Weiner Cardiovascular Institute at the Mount Sinai School of Medicine. “For years, it’s been the goal of cardiologists and surgeons to discover a more targeted method of controlling anticoagulation for patients undergoing ACS procedures, and the Phase 2b RADAR results exhibit significant promise toward this objective.”

For more information:,

Related Content

New FDA Proposed Rule Alters Informed Consent for Clinical Studies
News | Cardiovascular Clinical Studies | November 19, 2018
The U.S. Food and Drug Administration (FDA) is proposing to add an exception to informed consent requirements for...
A key slide from Elnabawi's presentation, showing cardiac CT plaque evaluations, showing the impact of psoriasis medication on coronary plaques at baseline and one year of treatment. It shows a reversal of vulnerable plaque development. #SCAI, #SCAI2018

A key slide from Elnabawi's presentation, showing cardiac CT plaque evaluations, showing the impact of psoriasis medication on coronary plaques at baseline and one year of treatment. It shows a reversal of vulnerable plaque development.  

Feature | Cardiovascular Clinical Studies | May 14, 2018
May 14, 2018 – New clinical evidance shows common therapy options for psoriasis (PSO), a chronic inflammatory skin di
Intravenous Drug Use is Causing Rise in Heart Valve Infections, Healthcare Costs. #SCAI, #SCAI2018
News | Cardiovascular Clinical Studies | May 14, 2018
May 14, 2018 — The opioid drug epidemic is impacting cardiology, with a new study finding the number of patients hosp
Patient Enrollment Completed in U.S. IDE Study of THERMOCOOL SMARTTOUCH SF Catheter
News | Cardiovascular Clinical Studies | March 15, 2018
March 15, 2018 –  Johnson & Johnson Medical Devices Companies announced today that Biosense Webster, Inc., who wo
Lexington Begins HeartSentry Clinical Trial
News | Cardiovascular Clinical Studies | February 20, 2018
February 20, 2018 – Lexington Biosciences, Inc., a development-stage medical device company, announced the commenceme
Endologix Completes Patient Enrollment in the ELEVATE IDE Clinical Study
News | Cardiovascular Clinical Studies | February 06, 2018
February 6, 2018 – Endologix, a developer and marketer of treatments for aortic disorders, announced the completion o
12-Month Results from Veryan Medical's MIMICS-2 IDE Study Presented at LINC
News | Cardiovascular Clinical Studies | February 01, 2018
February 1, 2018 – Thomas Zeller (Bad Krozingen, Germany) presented the 12-month results from Veryan Medical’s MIMICS
LimFlow Completes U.S. Feasibility Study Enrollment, Receives FDA Device Status
News | Cardiovascular Clinical Studies | February 01, 2018
February 1, 2018 –  LimFlow SA, developer of minimally-inv
ESC 2017 late breaking trial hot line study presentations.
News | Cardiovascular Clinical Studies | September 12, 2017
September 12, 2017 – The European Society of Cardiology (ESC) Congress 2017 includes several Hot Line Late-breaking C
U.K., NHS studies, weekend effect, hospital admission, atrial fibrillation, heart failure
News | Cardiovascular Clinical Studies | June 28, 2016
New research shows patients admitted to National Health Service (NHS) hospitals in the United Kingdom for atrial...
Overlay Init