Constitutive knockout of Surf1 is associated with high embryonic lethality, mitochondrial disease and cytochrome c oxidase deficiency in mice.

TitleConstitutive knockout of Surf1 is associated with high embryonic lethality, mitochondrial disease and cytochrome c oxidase deficiency in mice.
Publication TypeJournal Article
Year of Publication2003
AuthorsAgostino, A, Invernizzi, F, Tiveron, C, Fagiolari, G, Prelle, A, Lamantea, E, Giavazzi, A, Battaglia, G, Tatangelo, L, Tiranti, V, Zeviani, M
JournalHum Mol Genet
Volume12
Issue4
Pagination399-413
Date Published2003 Feb 15
ISSN0964-6906
KeywordsAlleles, Animals, Blotting, Southern, Blotting, Western, Brain, Cytochrome-c Oxidase Deficiency, Electron Transport Complex IV, Electrophoresis, Polyacrylamide Gel, Female, Genetic Vectors, Humans, Immunoblotting, Immunohistochemistry, Liver, Male, Membrane Proteins, Mice, Mice, Knockout, Mitochondrial Diseases, Mitochondrial Proteins, Models, Genetic, Muscle, Skeletal, Phenotype, Proteins, Reverse Transcriptase Polymerase Chain Reaction, Time Factors, Tissue Distribution
Abstract

We report here the creation of a constitutive knockout mouse for SURF1, a gene encoding one of the assembly proteins involved in the formation of cytochrome c oxidase (COX). Loss-of-function mutations of SURF1 cause Leigh syndrome associated with an isolated and generalized COX deficiency in humans. The murine phenotype is characterized by the following hallmarks: (1) high post-implantation embryonic lethality, affecting approximately 90% of the Surf1(-/-) individuals; (2) early-onset mortality of post-natal individuals; (3) highly significant deficit in muscle strength and motor performance; (4) profound and isolated defect of COX activity in skeletal muscle and liver, and, to a lesser extent, heart and brain; (5) morphological abnormalities of skeletal muscle, characterized by reduced histochemical reaction to COX and mitochondrial proliferation; (6) no obvious abnormalities in brain morphology, reflecting the virtual absence of overt neurological symptoms. These results indicate a function for murine Surf1 protein (Surf1p) specifically related to COX and recapitulate, at least in part, the human phenotype. This is the first mammalian model for a nuclear disease gene of a human mitochondrial disorder. Our model constitutes a useful tool to investigate the function of Surf1p, help understand the pathogenesis of Surf1p deficiency in vivo, and evaluate the efficacy of treatment.

DOI10.1093/hmg/ddg038
Alternate JournalHum. Mol. Genet.
Citation Key10.1093/hmg/ddg038
PubMed ID12566387
Grant List1180 / / Telethon / Italy