کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1931225 1050546 2010 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Over-expression of Tfam improves the mitochondrial disease phenotypes in a mouse model system
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Over-expression of Tfam improves the mitochondrial disease phenotypes in a mouse model system
چکیده انگلیسی

The phenotypes of mitochondrial diseases caused by mutations in mitochondrial DNA (mtDNA) have been proposed to be strictly regulated by the proportion of wild-type and pathogenically mutated mtDNAs. More specifically, it is thought that the onset of the disease phenotype occurs when cells cannot maintain the proper mitochondrial function because of an over-abundance of pathological mtDNA. Therapies that cause a decrease in the pathogenic mtDNA population have been proposed as a treatment for mitochondrial diseases, but these therapies are difficult to apply in practice. In this report, we present a novel concept: to improve mitochondrial disease phenotypes via an increase in the absolute copy number of the wild-type mtDNA population in pathogenic cells even when the relative proportion of mtDNA genotypes remains unchanged. We have succeeded in ameliorating the typical symptoms of mitochondrial disease in a model mouse line by the over-expression of the mitochondrial transcription factor A (Tfam) followed by an increase of the mtDNA copy number. This new concept should lead to the development of a novel therapeutic treatment for mitochondrial diseases.

Research highlights
► Over-expression of Tfam in mito-mice prolonged the life span.
► Disease phenotypes were improved in Tfam over-expressing mito-mice.
► Over-expression of Tfam increases the amount of mtDNA.
► Increased wild-type mtDNA provides normal RNAs and proteins in mito-mice.
► Sufficient levels of mitochondrial factors prevent cells from respiration deficiency.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical and Biophysical Research Communications - Volume 401, Issue 1, 8 October 2010, Pages 26–31
نویسندگان
, , , , , , , , , ,