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Mutations in mitochondrial DNA causing tubulointerstitial kidney disease

Artikel i vetenskaplig tidskrift
Författare T. M. Connor
S. Hoer
A. Mallett
D. P. Gale
A. Gomez-Duran
Viktor Posse
R. Antrobus
P. Moreno
M. Sciacovelli
C. Frezza
J. Duff
N. S. Sheerin
J. A. Sayer
M. Ashcroft
M. S. Wiesener
G. Hudson
Claes M Gustafsson
P. F. Chinnery
P. H. Maxwell
Publicerad i Plos Genetics
Volym 13
Nummer/häfte 3
ISSN 1553-7404
Publiceringsår 2017
Publicerad vid Institutionen för biomedicin
Språk English
Länkar doi.org/10.1371/journal.pgen.100662...
Ämnesord hypertrophic cardiomyopathy, linkage analysis, point mutations, cells, identification, epilepsy, mtdna
Ämneskategorier Urologi och njurmedicin, Infektionsmedicin

Sammanfattning

Tubulointerstitial kidney disease is an important cause of progressive renal failure whose aetiology is incompletely understood. We analysed a large pedigree with maternally inherited tubulointerstitial kidney disease and identified a homoplasmic substitution in the control region of the mitochondrial genome (m.547A> T). While mutations in mtDNA coding sequence are a well recognised cause of disease affecting multiple organs, mutations in the control region have never been shown to cause disease. Strikingly, our patients did not have classical features of mitochondrial disease. Patient fibroblasts showed reduced levels of mitochondrial tRNA(Phe), tRNA(Leu1) and reduced mitochondrial protein translation and respiration. Mitochondrial transfer demonstrated mitochondrial transmission of the defect and in vitro assays showed reduced activity of the heavy strand promoter. We also identified further kindreds with the same phenotype carrying a homoplasmic mutation in mitochondrial tRNA Phe (m.616T> C). Thus mutations in mitochondrial DNA can cause maternally inherited renal disease, likely mediated through reduced function of mitochondrial tRNA(Phe)

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