JMR-132 could provide a new therapeutic approach for the treatment of early and metastatic breast cancer QUEBEC CITY, April 17 /PRNewswire-FirstCall/ -- AEterna Zentaris Inc. (TSX: AEZ; Nasdaq: AEZS), a global, pure play biopharmaceutical company focused on endocrine therapy and oncology, today presented an abstract outlining in vivo data for its growth hormone-releasing hormone (GHRH) antagonist JMR-132 in breast cancer, at the American Association for Cancer Research (AACR) Annual Meeting being held this week at the Los Angeles Convention Center in Los Angeles, California. Results The poster #3568 "GHRH-Antagonist in Combination with Docetaxel Chemotherapy induces regression of MX-1 human experimental breast cancers," reviewed preclinical results in breast cancer for JMR-132, the Company's GHRH antagonist which binds to splice variants of the GHRH receptors found on various cancerous tumors. More specifically, the authors reported on the antitumor activity of JMR-132 in MX-1 human experimental, doxorubicin-resistant breast cancers, as well as on the anti-proliferative effect of JMR-132 in combination with docetaxel, which is frequently used for the treatment of early and metastatic breast cancer. Binding sites were found for GHRH in the MX-1 human breast cancer cell line. The treatment of nude mice bearing MX-1 xenografts with JMR-132 at the dose of 10 (micro)g/day s.c. significantly (p