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1. Genetic and Clinical Predictors of Age of ESKD in Individuals With Autosomal Dominant Tubulointerstitial Kidney Disease Due to UMOD Mutations

Author

Kendrah Kidd, Petr Vylet’al, Céline Schaeffer, Eric Olinger, Martina Živná, Kateřina Hodaňová, Victoria Robins, Emily Johnson, Abbigail Taylor, Lauren Martin, Claudia Izzi, Sofia C. Jorge, Joaquim Calado, Rosa J. Torres, Karl Lhotta, Dominik Steubl, Daniel P. Gale, Christine Gast, Eva Gombos, Hannah C. Ainsworth, Ying Maggie Chen, Jorge Reis Almeida, Cintia Fernandes de Souza, Catarina Silveira, Rita Raposeiro, Nelson Weller, Peter J. Conlon, Susan L. Murray, Katherine A. Benson, Gianpiero L. Cavalleri, Miroslav Votruba, Alena Vrbacká, Antonio Amoroso, Daniela Gianchino, Gianluca Caridi, Gian Marco Ghiggeri, Jasmin Divers, Francesco Scolari, Olivier Devuyst, Luca Rampoldi, Stanislav Kmoch, and Anthony J. Bleyer

Subjects
autosomal dominant uromodulin kidney disease, genotype, phenotype, rs4293393, uromodulin, Diseases of the genitourinary system. Urology, RC870-923
Abstract

Introduction: Autosomal dominant tubulo-interstitial kidney disease due to UMOD mutations (ADTKD-UMOD) is a rare condition associated with high variability in the age of end-stage kidney disease (ESKD). The minor allele of rs4293393, located in the promoter of the UMOD gene, is present in 19% of the population and downregulates uromodulin production by approximately 50% and might affect the age of ESKD. The goal of this study was to better understand the genetic and clinical characteristics of ADTKD-UMOD and to perform a Mendelian randomization study to determine if the minor allele of rs4293393 was associated with better kidney survival. Methods: An international group of collaborators collected clinical and genetic data on 722 affected individuals from 249 families with 125 mutations, including 28 new mutations. The median age of ESKD was 47 years. Men were at a much higher risk of progression to ESKD (hazard ratio 1.78, P < 0.001). Results: The allele frequency of the minor rs4293393 allele was only 11.6% versus the 19% expected (P < 0.01), resulting in Hardy-Weinberg disequilibrium and precluding a Mendelian randomization experiment. An in vitro score reflecting the severity of the trafficking defect of uromodulin mutants was found to be a promising predictor of the age of ESKD. Conclusion: We report the clinical characteristics associated with 125 UMOD mutations. Male gender and a new in vitro score predict age of ESKD.

Published
2020
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2. Genetic and Clinical Predictors of Age of ESKD in Individuals With Autosomal Dominant Tubulointerstitial Kidney Disease Due to UMOD Mutations

Author

Karl Lhotta, Peter J. Conlon, Daniel P. Gale, Victoria Robins, Miroslav Votruba, Kendrah Kidd, Céline Schaeffer, Dominik Steubl, Ying Maggie Chen, Catarina Silveira, Gianluca Caridi, Lauren Martin, Claudia Izzi, Antonio Amoroso, Eric Olinger, Jorge Reis Almeida, Stanislav Kmoch, Rita Raposeiro, Daniela Gianchino, Alena Vrbacká, Hannah C. Ainsworth, Martina Živná, Gian Marco Ghiggeri, Kateřina Hodaňová, Rosa J. Torres, Christine Gast, Joaquim Calado, Abbigail Taylor, Olivier Devuyst, Katherine A. Benson, Susan L. Murray, Cintia Fernandes de Souza, Eva Gombos, Emily Johnson, Francesco Scolari, Gianpiero L. Cavalleri, Petr Vylet'al, Jasmin Divers, Anthony J. Bleyer, Luca Rampoldi, Sofia C Jorge, Nelson Weller, UCL - SSS/IREC/NEFR - Pôle de Néphrologie, UCL - (SLuc) Service de néphrologie, Centre for Toxicogenomics and Human Health (ToxOmics), NOVA Medical School|Faculdade de Ciências Médicas (NMS|FCM), Kidd, K, Vylet’Al, P, Schaeffer, C, Olinger, E, Živná, M, Hodaňová, K, Robins, V, Johnson, E, Taylor, A, Martin, L, Izzi, C, Jorge, Sc, Calado, J, Torres, Rj, Lhotta, K, Steubl, D, Gale, Dp, Gast, C, Gombos, E, Ainsworth, H, Chen, Ym, Almeida, Jr, Fernandes de Souza, C, Silveira, C, Raposeiro, R, Weller, N, Conlon, P, Murray, S, Benson, Ka, Cavalleri, G, Votruba, M, Vrbacká, A, Amoroso, A, Gianchino, D, Caridi, G, Ghiggeri, Gm, Divers, J, Scolari, F, Devuyst, O, Rampoldi, L, Kmoch, S, and Bleyer, A

Subjects
Oncology, medicine.medical_specialty, autosomal dominant uromodulin kidney disease, Tamm–Horsfall protein, phenotype, uromodulin, genotype, Population, 030232 urology & nephrology, 030204 cardiovascular system & hematology, lcsh:RC870-923, rs4293393, 03 medical and health sciences, 0302 clinical medicine, Internal medicine, Genotype, Mendelian randomization, medicine, Allele, education, Allele frequency, education.field_of_study, biology, business.industry, medicine.disease, lcsh:Diseases of the genitourinary system. Urology, Minor allele frequency, Ophthalmology, Nephrology, biology.protein, business, Kidney disease
Abstract

Introduction: Autosomal dominant tubulo-interstitial kidney disease due to UMOD mutations (ADTKD-UMOD) is a rare condition associated with high variability in the age of end-stage kidney disease (ESKD). The minor allele of rs4293393, located in the promoter of the UMOD gene, is present in 19% of the population and downregulates uromodulin production by approximately 50% and might affect the age of ESKD. The goal of this study was to better understand the genetic and clinical characteristics of ADTKD-UMOD and to perform a Mendelian randomization study to determine if the minor allele of rs4293393 was associated with better kidney survival. Methods: An international group of collaborators collected clinical and genetic data on 722 affected individuals from 249 families with 125 mutations, including 28 new mutations. The median age of ESKD was 47 years. Men were at a much higher risk of progression to ESKD (hazard ratio 1.78, P < 0.001). Results: The allele frequency of the minor rs4293393 allele was only 11.6% versus the 19% expected (P < 0.01), resulting in Hardy-Weinberg disequilibrium and precluding a Mendelian randomization experiment. An in vitro score reflecting the severity of the trafficking defect of uromodulin mutants was found to be a promising predictor of the age of ESKD. Conclusion: We report the clinical characteristics associated with 125 UMOD mutations. Male gender and a new in vitro score predict age of ESKD. publishersversion published

Published
2020

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