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El tratamiento con mitapivat produce un rápido, sostenido y clínicamente significativo incremento de la hemoglobina en la mitad de los pacientes con dé- ficit de PK, con mejoría de los parámetros de hemó- lisis en una amplia variedad de pacientes. Dada la relación de la respuesta con el genotipo observada con mitapivat, los pacientes con 2 mutaciones de tipo no-missense u homocigotos para R479H, en principio no candidatos a este tratamiento, probablemente po- drían ser elegibles en el futuro para ensayos de tera- pia génica.
Tanto los activadores de la glucolisis como la terapia génica son terapias emergentes en eritropatología y, si se vuelven clínicamente disponibles, el enfoque te- rapéutico de estos pacientes cambiaría significativa- mente.
❯ Bibliografía
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6. Yang H, Merica E, Chen Y, Cohen M, Goldwater R, Kosinski PA, et al. Phase I Single and Multiple-Ascending-Dose Randomized Studies of the Safety, Phar- macokinetics, and Pahrmacodynamics og AG-348, a Fisrt-in-Class Allosteric Activator os Pyruvate Kinase R, in Healthy Volunteers. Clin Pharmacol Drug Dev. 2019 Feb;8(2):246-59.
7. Grace RF, Rose C, Layton DM, Galactéros F, Barcellini W, Morton DH, et al. Safety and Efficacy of Mitapivat in Pyruvate Kinase Deficiency. N Engl J Med. 2019;381:933-44.
8. Grace RF, Bianchi P, Van Beers EJ, Eber SW, Glader B, Yaish HM, et al. Clinical spectrum of pyruvate kinase deficiency data from the pyruvate kinase defi- ciency natural history study. Blood. 2018;131:2183-92.
9. Grace RF, Layton DM, Galactéros F, Barcellini W, van Beers EJ, Yaish HM, et al. EP1561. Mitapivat (AG-348) long-term safety and efficacy in pyruvate kinase deficiency: 3-year results of the drive PK study. Paper presented at: 25th Virtual Congress of the European Hematology Association; 2020 June 11-21.
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12. Rab M, van Dooijeweert B, Bos J, van Oirschot B, Kosinski P, van Wesel A, et al. EP1566. Secondary deficiency of pyruvate kinase and altered red cell metabolism in hereditary xerocytosis caused by PIEZO1 and KCNN4 defects. Paper presented at: 25th Virtual Congress of the European Hematology As- sociation; 2020 June 11-21.
13. Estepp JH, Kalfa T, Saraf S, Kim H, Biernat L, Malik P, et al. EP1531. Phase 1 single (SAD) and multiple ascending dose (MAD) study of the safety, pharmacokinetics (PK) and pharmacodynamics (PD) of FT-4202, a PKR- activator, in healthy and sickle cell disease subjects. Paper presented at: 25th Virtual Congress of the European Hematology Association; 2020 June 11-21.
14. Tani K, Yoshikubo T, Ikebuchi K, Takahashi K, Tsuchiya T, Takahashi S, et al. Retrovirus-mediated gene transfer of human pyruvate kinase (PK) cDNA into murine hematopoietic cells: implications for gene therapy of human PK defi- ciency. Blood. 1994 Apr 15;83(8):2305-10.
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 LXII Congreso Nacional de la Sociedad Española de Hematología y Hemoterapia / Ponencias
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