Date:12/5/2012

>ABOUT REG1, REG2 and REG3 
Regado's lead program, the anticoagulant system REG1, consists of two agents both administered by IV bolus, the first being a potent highly selective Factor IXa inhibitor (pegnivacogin) with the second being its complementary active control agent (anivamersen).  Anivamersen can be used to selectively reverse (completely or partially) the anticoagulant effect of pegnivacogin.  REG1, recently completing phase 2b (the RADAR trial), is intended for application in arterial thrombosis indications, such as Acute Coronary Syndrome patients undergoing Percutaneous Coronary Intervention.  A clinical program in Open Heart Surgery [including coronary artery bypass grafting (CABG) and valve repair/replacement] is also under development.  REG2, Regado's second product candidate, consists of a subcutaneously administered depot formulation of pegnivacogin paired with the IV bolus formulation of anivamersen.  REG2 has completed single escalating dose phase 1 clinical testing (the first successful subcutaneous application of an aptamer in humans) and is planned to be studied in a multiple escalating dose clinical trial.  It is intended for use in venous thrombosis indications such as venous thromboembolism (VTE) prophylaxis in patients undergoing abdominal surgery.  REG3, Regado's third program, consists of a specific GPVI inhibitor and its active control agent (RB571 and RB515, respectively).  REG3 is planned to enter phase 1 human clinical testing shortly and will be indicated for antiplatelet therapy such as in treating diabetic vasculopathies.

ABOUT APTAMERS
Pegnivacogin is a member of a class of compounds called aptamers.  Aptamers are single stranded oligonucleotides that adopt a specific conformation enabling direct, specific inhibition of the targeted protein.   A key unique feature of aptamers derives from the fact that they are formed from nucleic acids. 
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