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Milanesio B, Pepe C, Defelipe LA, Eandi Eberle S, Avalos Gomez V, Chaves A, Albero A, Aguirre F, Fernandez D, Aizpurua L, Paula Dieuzeide M, Turjanski A, Bianchi P, Fermo E, Feliu-Torres A. Six novel variants in the PKLR gene associated with pyruvate kinase deficiency in Argentinian patients. Clin Biochem 2021; 91:26-30. [PMID: 33631127 DOI: 10.1016/j.clinbiochem.2021.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/29/2021] [Accepted: 02/08/2021] [Indexed: 10/22/2022]
Abstract
BACKGROUND Pyruvate kinase deficiency (PKD) is a rare recessive congenital hemolytic anemia caused by mutations in the PKLR gene. The disease shows a marked variability in clinical expression. We studied the molecular features of nine unrelated Argentinian patients with congenital hemolytic anemia associated with erythrocyte pyruvate kinase deficiency. DESIGN AND METHODS Routine hematologic investigations were performed to rule out other causes of chronic hemolytic anemia. Sanger sequencing and in-sílico analysis were carried out to identify and characterize the genetics variants. RESULTS Six different novel missense variants were detected among the 18 studied alleles: c.661 G > C (Asp221His), c.956 G > T (Gly319Val), c.1595 G > C (Arg532Pro), c.347 G > A (Arg116Gln), c.1232 G > T (Gly411Val), c.1021G > A (Gly341Ser). Structural implications of amino-acid substitutions were correlated with the clinical phenotypes seen in the probands. CONCLUSIONS This is the first comprehensive report on molecular characterization of pyruvate kinase deficiency in Argentina and the second from South America that would contribute to our knowledge on the distribution and frequency of PKLR variants in our population but also offer new insights into the interpretation of the effect of PKLR variants and phenotype.
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Affiliation(s)
- Berenice Milanesio
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina
| | - Carolina Pepe
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina
| | - Lucas A Defelipe
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina; IQUIBICEN/UBA-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Silvia Eandi Eberle
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina
| | - Vanesa Avalos Gomez
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina
| | - Alejandro Chaves
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina
| | - Agustina Albero
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina
| | - Fernando Aguirre
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina
| | - Diego Fernandez
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina
| | - Luciana Aizpurua
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina
| | - María Paula Dieuzeide
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina
| | - Adrián Turjanski
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina; IQUIBICEN/UBA-CONICET, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Paola Bianchi
- U.O.C. Ematologia, U.O.S. FisiopatologiadelleAnemie, Fondazione IRCCS Ca Granada, OspedaleMaggiore Policlínico, Milan, Italy
| | - Elisa Fermo
- U.O.C. Ematologia, U.O.S. FisiopatologiadelleAnemie, Fondazione IRCCS Ca Granada, OspedaleMaggiore Policlínico, Milan, Italy
| | - Aurora Feliu-Torres
- Servicio de Hematología-Oncología, Hospital de Pediatría "Prof. Dr. Juan P. Garrahan", Combate de los Pozos 1881, (C1245AAM) Buenos Aires, Argentina.
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