Volume 23, Issue 4 e13407
ORIGINAL ARTICLE

Kidney disease and organ transplantation in methylmalonic acidaemia

Damien Noone

Corresponding Author

Damien Noone

Division of Nephrology, The Hospital for Sick Children, Toronto, Ontario, Canada

Department of Paediatrics, University of Toronto, Toronto, Ontario, Canada

Correspondence

Damien Noone, Department of Paediatrics, University of Toronto Staff Physician, Division of Nephrology The Hospital for Sick Children Division of Nephrology 555 University Avenue, Toronto, ON M5G 1X8, Canada.

E-mail: [email protected]

and

Chitra Prasad, Genetics, Metabolism and Paediatrics, Western University, London, ON, Canada.

Email: [email protected]

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Magdalena Riedl

Magdalena Riedl

Division of Nephrology, The Hospital for Sick Children, Toronto, Ontario, Canada

Department of Paediatrics, University of Toronto, Toronto, Ontario, Canada

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Paul Atkison

Paul Atkison

Department of Paediatrics, Western University, London, Ontario, Canada

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Yaron Avitzur

Yaron Avitzur

Department of Paediatrics, University of Toronto, Toronto, Ontario, Canada

Division of Gastroenterology, Hepatology and Nutrition, University of Alberta/Stollery Children’s Hospital, Edmonton, Alberta, Canada

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Ajay P Sharma

Ajay P Sharma

Department of Paediatrics, Western University, London, Ontario, Canada

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Guido Filler

Guido Filler

Department of Paediatrics, Western University, London, Ontario, Canada

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Komudi Siriwardena

Komudi Siriwardena

Department of Medical Genetics, University of Alberta/Stollery Children's Hospital, Edmonton, Alberta, Canada

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Chitra Prasad

Corresponding Author

Chitra Prasad

Department of Paediatrics, Western University, London, Ontario, Canada

Correspondence

Damien Noone, Department of Paediatrics, University of Toronto Staff Physician, Division of Nephrology The Hospital for Sick Children Division of Nephrology 555 University Avenue, Toronto, ON M5G 1X8, Canada.

E-mail: [email protected]

and

Chitra Prasad, Genetics, Metabolism and Paediatrics, Western University, London, ON, Canada.

Email: [email protected]

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First published: 11 April 2019
Citations: 15
Noone and Riedl are co-first authors.

Abstract

Objectives

MMA is associated with chronic tubulointerstitial nephritis and a progressive decline in GFR. Optimal management of these children is uncertain. Our objectives were to document the pre-, peri-, and post-transplant course of all children with MMA who underwent liver or combined liver-kidney transplant in our centers.

Design and methods

Retrospective chart review of all cases of MMA who underwent organ transplantation over the last 10 years.

Results

Five children with MMA underwent liver transplant (4/5) and combined liver-kidney transplant (1/5). Three were Mut0 and two had a cobalamin B disorder. Four of five were transplanted between ages 3 and 5 years. Renal dysfunction prior to transplant was seen in 2/5 patients. Post-transplant (one liver transplant and one combined transplant) renal function improved slightly when using creatinine-based GFR formula. We noticed in 2 patients a big discrepancy between creatinine- and cystatin C-based GFR calculations. One patient with no renal disease developed renal failure post–liver transplantation. Serum MMA levels have decreased in all to <300 μmol/L. Four patients remain on low protein diet, carnitine, coenzyme Q, and vitamin E post-transplant.

Conclusions

MMA is a complex metabolic disorder. Renal disease can continue to progress post–liver transplant and close follow-up is warranted. More research is needed to clarify best screening GFR method in patients with MMA. Whether liver transplant alone, continued protein restriction, or the addition of antioxidants post-transplant can halt the progression of renal disease remains unclear.

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