EZN-3920 - Enzon
Targeting the HER3-phosphatidyl inositol-3 kinase pathway in breast cancers (SABCS 2012) - Dec 10, 2012 - "...Luminal breast tumor xenografts treated with U3-1287, a humanized monoclonal anti-ErbB3 antibody, or EZN-3920, an anti-sense oligonucleotide against ErbB3, decreased tumor growth and phosphatidyl inositol-3 kinase (PI3K)/mTOR signaling in vivo..." 
Preclinical Breast Cancer • Oncology
http://www.sabcs.org/UserPortal/Documents/SABCS_2012_Abstract_Book.pdf
 
35th Annual San Antonio Breast Cancer Symposium (SABCS), Dec 4-8, 2012, SA, Texas.
 
Dec 10, 2012
 
P5-19-01 "…Luminal breast tumor xenografts treated with U3-1287, a humanized monoclonal anti-ErbB3 antibody, or EZN-3920, an anti-sense oligonucleotide against ErbB3, decreased tumor growth and phosphatidyl inositol-3 kinase (PI3K)/mTOR signaling in vivo. Interestingly, luminal breast tumor xenografts responded to the ER inhibitor fulvestrant with increased HER3 expression..."