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Aptose Biosciences Granted Orphan Drug Designation by the U.S. FDA for APTO-253 in Acute Myeloid Leukemia
"AML is a particularly challenging cancer of the blood and bone marrow for which there are currently few treatment options," said
Epigenetic suppression of the Krüppel-like factor 4 (KLF4) gene has been reported in the scientific literature as a key transforming event in AML. APTO-253 is a first-in-class, targeted inducer of the KLF4 tumor suppressor gene, and has demonstrated a favorable safety profile with no evidence of suppression of the normal bone marrow. Preclinical studies have shown potent single-agent activity to kill AML cells and strong synergy as part of a combination strategy with various marketed and investigational agents. APTO-253 is currently in a Phase 1b clinical study in patients with relapsed or refractory hematologic malignancies.
Orphan drug designation is granted by the
About Acute Myeloid Leukemia
Acute myeloid leukemia (AML) is a cancer derived from myeloid progenitor or stem cells that typically mature into red blood cells, white blood cells or platelets. AML initiates in the bone marrow when stem or progenitor cells lose cell cycle control, anti-apoptotic factor or other means to limit rampant proliferations. Leukemic cells have the ability to rapidly spread from the marrow to the bloodstream. Further, these rapidly proliferating cells quickly crowd out normal cells as they infiltrate other organs and tissue systems.
AML is the most common type of acute leukemia among adults, with an annual incidence of more than 18,000 patients, and causing more than 10,000 deaths each year in the U.S. It is a particularly devastating blood cancer, with less than 25 percent of newly diagnosed patients surviving beyond five years.
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