Annamycin aims to eliminate cardiotoxicity associated with anthracyclines used to treat about 60% of all children with cancer 

FDA recommends inclusion of patients as young as 6 months – younger than Moleculin had proposed – to be allowed in the pediatric clinical study

Enrollment and dosing are ongoing in pivotal, adaptive design Phase 3 MIRACLE trial of Annamycin in adult patients with R/R AML; Initial data readout is on track for the second half of 2025

(NASDAQ:MBRX) ("Moleculin" or the "Company"), a late-stage pharmaceutical company with a broad portfolio of drug candidates targeting hard-to-treat cancers and viral infections, today announced it has received a written response from the Office of Oncologic Diseases - Pediatric Oncology, of the U.S. Food and Drug Administration (FDA) regarding the Company's Initial Pediatric Study Plan (iPSP), which was submitted after a June 2024 end-of-phase 1/2 meeting. The FDA has agreed to a single pediatric approval study in which Annamycin (also known as naxtarubicin) in combination with Cytarabine (also known as "Ara-C" and for which the combination of Annamycin and Ara-C is referred to as "AnnAraC") will be evaluated as second line therapy in pediatric patients with relapsed/refractory acute myeloid leukemia (R/R AML), a form of cancer.

"We continue to be encouraged by the potential of Annamycin to change the game when it comes to the most prevalent cancer therapies in use today. This is particularly important in pediatric oncology, where about 60% of children with cancer are treated with anthracyclines that present a high risk of causing heart damage. An independent expert's review of study data has shown no cardiotoxicity to date in 84 adult patients treated with Annamycin, which is why we're excited about moving forward in young children with cancer. Receiving this written feedback from FDA is a crucial step in the development of Annamycin for pediatric use and provides us with helpful insight as we continue to prepare for the launch of a pediatric trial, planned for the second half of 2027," said Walter Klemp, Chairman and CEO of Moleculin. "As our team works to address and implement FDA's feedback on our iPSP, we remain focused on the successful execution of our ongoing MIRACLE trial of AnnAraC in adult patients with R/R AML and look forward to initial data from that trial later this year."