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PN-951 is a discontinued small molecule uridine prodrug developed by Wellstat Therapeutics (formerly Pro-Neuron) for the treatment of hematologic diseases, specifically chemotherapy-induced myelosuppression. The compound was designed to increase systemic levels of uridine, a key pyrimidine nucleoside essential for the synthesis of RNA and DNA in rapidly dividing cells. By augmenting the pyrimidine salvage pathway, PN-951 aimed to protect hematopoietic stem cells and accelerate the recovery of blood cell counts, such as neutrophils and platelets, following damage from cytotoxic chemotherapeutic agents. Clinical development of PN-951 reached Phase 1 trials before the program was discontinued.
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