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Perdomo-Ramirez A, Cordoba-Lanus E, Trujillo-Frias CJ, Gonzalez-Navasa C, Ramos-Trujillo E, Luis-Yanes MI, Garcia-Nieto V, Claverie-Martin F. Pathogenic Variants of SLC22A12 (URAT1) and SLC2A9 (GLUT9) in Spanish Patients with Renal Hypouricemia: Founder Effect of SLC2A9 Variant c.374C>T; p.(T125M). Int J Mol Sci 2023; 24:ijms24098455. [PMID: 37176161 PMCID: PMC10179447 DOI: 10.3390/ijms24098455] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2023] [Revised: 05/02/2023] [Accepted: 05/03/2023] [Indexed: 05/15/2023] Open
Abstract
Renal hypouricemia (RHUC) is a rare inherited disorder characterized by impaired urate reabsorption in the proximal tubule resulting in low urate serum levels and increased urate excretion. Some patients may present severe complications such as exercise-induced acute renal failure and nephrolithiasis. RHUC is caused by inactivating mutations in the SLC22A12 (RHUC type 1) or SLC2A9 (RHUC type 2) genes, which encode urate transporters URAT1 and GLUT9, respectively. In this study, our goal was to identify mutations associated with twenty-one new cases with RHUC through direct sequencing of SLC22A12 and SLC2A9 coding exons. Additionally, we carried out an SNPs-haplotype analysis to determine whether the rare SLC2A9 variant c.374C>T; p.(T125M), which is recurrent in Spanish families with RHUC type 2, had a common-linked haplotype. Six intragenic informative SNPs were analyzed using PCR amplification from genomic DNA and direct sequencing. Our results showed that ten patients carried the SLC22A12 mutation c.1400C>T; p.(T467M), ten presented the SLC2A9 mutation c.374C>T, and one carried a new SLC2A9 heterozygous mutation, c.593G>A; p.(R198H). Patients carrying the SLC2A9 mutation c.374C>T share a common-linked haplotype, confirming that it emerged due to a founder effect.
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Affiliation(s)
- Ana Perdomo-Ramirez
- Unidad de Investigacion, Hospital Universitario Nuestra Señora de Candelaria, 38010 Santa Cruz de Tenerife, Spain
| | - Elizabeth Cordoba-Lanus
- Unidad de Investigacion, Hospital Universitario Nuestra Señora de Candelaria, 38010 Santa Cruz de Tenerife, Spain
- Instituto Universitario de Enfermedades Tropicales y Salud Publica de Canarias (IUETSPC), Universidad de La Laguna, 38296 Santa Cruz de Tenerife, Spain
| | - Carmen Jane Trujillo-Frias
- Unidad de Investigacion, Hospital Universitario Nuestra Señora de Candelaria, 38010 Santa Cruz de Tenerife, Spain
| | - Carolina Gonzalez-Navasa
- Unidad de Investigacion, Hospital Universitario Nuestra Señora de Candelaria, 38010 Santa Cruz de Tenerife, Spain
- Seccion Medicina, Departamento de Medicina Fisica y Farmacologia, Facultad de Ciencias de la Salud, Universidad de La Laguna, 38200 Santa Cruz de Tenerife, Spain
| | - Elena Ramos-Trujillo
- Unidad de Investigacion, Hospital Universitario Nuestra Señora de Candelaria, 38010 Santa Cruz de Tenerife, Spain
- Seccion Medicina, Departamento de Medicina Fisica y Farmacologia, Facultad de Ciencias de la Salud, Universidad de La Laguna, 38200 Santa Cruz de Tenerife, Spain
| | - Maria Isabel Luis-Yanes
- Unidad de Nefrologia Pediatrica, Hospital Universitario Nuestra Señora de Candelaria, 38010 Santa Cruz de Tenerife, Spain
| | - Victor Garcia-Nieto
- Unidad de Nefrologia Pediatrica, Hospital Universitario Nuestra Señora de Candelaria, 38010 Santa Cruz de Tenerife, Spain
| | - Felix Claverie-Martin
- Unidad de Investigacion, Hospital Universitario Nuestra Señora de Candelaria, 38010 Santa Cruz de Tenerife, Spain
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Garcia-Nieto V, Negrete-Pedraza F, Lopez-Garcia M, Luis-Yanes MI. Are simple renal cysts in childhood associated with kidney stones? Nephrourol Mon 2012; 4:596-8. [PMID: 23573497 PMCID: PMC3614311 DOI: 10.5812/numonthly.2682] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2011] [Revised: 05/05/2012] [Accepted: 05/30/2012] [Indexed: 11/16/2022] Open
Affiliation(s)
- Victor Garcia-Nieto
- Pediatric Nephrology Unit, Hospital Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain
- Corresponding author: Victor Garcia-Nieto, Pediatric Nephrology Unit, Hospital Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain. Tel.: +34-922600537, Fax: +34-92600605, E-mail:
| | | | - Marta Lopez-Garcia
- Pediatrics Department, Hospital Universitario de Canarias, Tenerife, Spain
| | - Maria Isabel Luis-Yanes
- Pediatric Nephrology Unit, Hospital Nuestra Señora de Candelaria, Santa Cruz de Tenerife, Spain
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