In January 2023, Context Therapeutics Inc. enrolled the first patient in the ELONA study, an open-label, Phase 1b/2 breast cancer clinical trial being conducted in partnership with The Menarini Group ("Menarini”). The ELONA study is designed to explore the efficacy of ONA-XR in combination with elacestrant, Menarini's selective estrogen receptor degrader, in patients with locally advanced or metastatic breast cancer who have received prior treatment with a CDK4/6 inhibitor. In Menarini's recently completed EMERALD Phase 3 trial, elacestrant demonstrated a 0.9-month PFS improvement versus the standard-of-care fulvestrant (2.8 vs 1.9 months) in a similar treatment population and as a result may become the standard-of-care antiestrogen treatment2.

Compared to elacestrant alone, Context believes that the combination of ONA-XR plus elacestrant may more completely inhibit progesterone and estrogen hormone signaling that is required for breast cancer growth and metastasis. Such a combination would potentially improve outcomes in patients without adding significant toxicity.