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Mitapivat for treating pyruvate kinase deficiency


Haematology and Blood Products

November 2020

Mitapivat is currently in clinical development for the treatment of adult patients with pyruvate kinase deficiency (PKD) who have regular blood transfusions and those who do not have regular blood transfusions. PKD is a genetic blood disorder caused by low levels of the enzyme pyruvate kinase (PK). Low levels of PK result in a deficiency in energy and causes red blood cells to break down too early. This is known as haemolytic anaemia. Symptoms of PKD vary significantly with some patients requiring no treatment and some patients requiring blood transfusions, surgery to remove the spleen or haematopoietic stem cell transplant which are all associated with risks and complications. There are currently no disease modifying treatments approved for the treatment of PKD.
Mitapivat is administered as an oral tablet, twice a day. Mitapivat works by activating normal PK and mutated PK enzymes. Mitapivat has been shown in clinical trials to be safe and to rapidly increase the haemoglobin levels of adults with PKD. If licensed, mitapivat would be the first approved disease modifying therapy for PKD patients and may reduce the need for surgery, transplantation or transfusions.

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