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Martin-Higueras C, Borghese L, Torres A, Fraga-Bilbao F, Santana-Estupiñán R, Stefanidis CJ, Tory K, Walli A, Gondra L, Kempf C, Gessner M, Habbig S, Eifler L, Schmitt CP, Rüdel B, Bartram MP, Beck BB, Hoppe B. Multicenter Long-Term Real World Data on Treatment With Lumasiran in Patients With Primary Hyperoxaluria Type 1. Kidney Int Rep 2024; 9:114-133. [PMID: 38312792 PMCID: PMC10831356 DOI: 10.1016/j.ekir.2023.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 08/28/2023] [Accepted: 10/02/2023] [Indexed: 02/06/2024] Open
Abstract
Introduction The RNA interference (RNAi) medication lumasiran reduces hepatic oxalate production in primary hyperoxaluria type 1 (PH1). Data outside clinical trials are scarce. Methods We report on retrospectively and observationally obtained data in 33 patients with PH1 (20 with preserved kidney function, 13 on dialysis) treated with lumasiran for a median of 18 months. Results Among those with preserved kidney function, mean urine oxalate (Uox) decreased from 1.88 (baseline) to 0.73 mmol/1.73 m2 per 24h after 3 months, to 0.72 at 12 months, and to 0.65 at 18 months, but differed according to vitamin B6 (VB6) medication. The highest response was at month 4 (0.55, -70.8%). Plasma oxalate (Pox) remained stable over time. Glomerular filtration rate increased significantly by 10.5% at month 18. Nephrolithiasis continued active in 6 patients, nephrocalcinosis ameliorated or progressed in 1 patient each. At last follow-up, Uox remained above 1.5 upper limit of normal (>0.75 mmol/1.73 m2 per 24h) in 6 patients. Urinary glycolate (Uglyc) and plasma glycolate (Pglyc) significantly increased in all, urine citrate decreased, and alkali medication needed adaptation. Among those on dialysis, mean Pox and Pglyc significantly decreased and increased, respectively after monthly dosing (Pox: 78-37.2, Pglyc: 216.4-337.4 μmol/l). At quarterly dosing, neither Pox nor Pglyc were significantly different from baseline levels. An acid state was buffered by an increased dialysis regimen. Systemic oxalosis remained unchanged. Conclusion Lumasiran treatment is safe and efficient. Dosage (interval) adjustment necessities need clarification. In dialysis, lack of Pox reduction may relate to dissolving systemic oxalate deposits. Pglyc increment may be a considerable acid load requiring careful consideration, which definitively needs further investigation.
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Affiliation(s)
- Cristina Martin-Higueras
- German Hyperoxaluria Center, c/o Kindernierenzentrum Bonn, Germany
- Institute of Biomedical Technology, University of La Laguna, Tenerife, Spain
| | | | - Armando Torres
- Institute of Biomedical Technology, University of La Laguna, Tenerife, Spain
- Department of Nephrology, Hospital Universitario de Canarias, Tenerife, Spain
| | - Fátima Fraga-Bilbao
- Department of Pediatrics, Hospital Universitario de Canarias, Tenerife, Spain
| | - Raquel Santana-Estupiñán
- Department of Nephrology, Hospital Universitario de Gran Canaria Doctor Negrín, Gran Canaria, Spain
| | | | - Kálmán Tory
- Pediatric Center, MTA Center of Excellence, Semmelweis University; Budapest, Hungary & MTA-SE Lendulet Nephrogenetic Laboratory, Hungarian Academy of Sciences, Budapest, Hungary
| | - Adam Walli
- Wisplinghoff Laboratory, Cologne, Germany
| | - Leire Gondra
- Pediatric Nephrology Department, Cruces University Hospital, UPV/EHU, Biocruces Bizkaia Health Research Institute, Barakaldo, Spain
| | - Caroline Kempf
- Department of Pediatric Gastroenterology, Nephrology and Metabolic Disorders, Charité Universitätsmedizin Berlin, Germany
| | | | - Sandra Habbig
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Pediatrics, Cologne, Germany
| | - Lisa Eifler
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Department of Pediatrics, Cologne, Germany
| | - Claus P. Schmitt
- Division of Pediatric Nephrology, University Hospital Heidelberg, Germany
| | | | - Malte P. Bartram
- Department II of Internal Medicine and Center for Molecular Medicine Cologne, Faculty of Medicine, University of Cologne, University Hospital Cologne, Cologne, Germany
| | - Bodo B. Beck
- Institute of Human Genetics, University Hospital Cologne, Germany
| | - Bernd Hoppe
- German Hyperoxaluria Center, c/o Kindernierenzentrum Bonn, Germany
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Abstract
The primary hyperoxalurias are three rare inborn errors of the glyoxylate metabolism in the liver, which lead to massively increased endogenous oxalate production, thus elevating urinary oxalate excretion and, based on that, recurrent urolithiasis and/or progressive nephrocalcinosis. Frequently, especially in type 1 primary hyperoxaluria, early end-stage renal failure occurs. Treatment possibilities are scare, namely, hyperhydration and alkaline citrate medication. In type 1 primary hyperoxaluria, vitamin B6, though, is helpful in patients with specific missense or mistargeting mutations. In those vitamin B6 responsive, urinary oxalate excretion and concomitantly urinary glycolate is significantly decreased, or even normalized. In patients non-responsive to vitamin B6, RNA interference medication is now available. Lumasiran® is already available on prescription and targets the messenger RNA of glycolate oxidase, thus blocking the conversion of glycolate into glyoxylate, hence decreasing oxalate, but increasing glycolate production. Nedosiran blocks liver-specific lactate dehydrogenase A and thus the final step of oxalate production. Similar to vitamin B6 treatment, where both RNA interference urinary oxalate excretion can be (near) normalized and plasma oxalate decreases, however, urinary and plasma glycolate increases with lumasiran treatment. Future treatment possibilities are on the horizon, for example, substrate reduction therapy with small molecules or gene editing, induced pluripotent stem cell-derived autologous hepatocyte-like cell transplantation, or gene therapy with newly developed vector technologies. This review provides an overview of current and especially new and future treatment options.
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Affiliation(s)
| | - Cristina Martin-Higueras
- German Hyperoxaluria Center, Bonn, Germany.
- Institute of Biomedical Technologies, CIBERER, Campus de Ofra s/n 38200, University of La Laguna, Tenerife, Spain.
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