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Genome Information for Mus musculus
Mitochondria play an essential role in the ability of brown fat to generate heat, and the PGC-1 coactivators control several aspects of mitochondrial biogenesis. To investigate their specific roles in brown fat cells, we generated immortal preadipocyte lines from the brown adipose tissue of mice lacking PGC-1α. We could then efficiently knockdown PGC-1β expression by shRNA expression. Loss of PGC-1α did not alter brown fat differentiation but severely reduced the induction of thermogenic genes. Cells deficient in either PGC-1α or PGC-1β coactivators showed a small decrease in the differentiation-dependant program of mitochondrial biogenesis and respiration; however, this increase in mitochondrial number and function was totally abolished during brown fat differentiation when both PGC-1α and PGC-1β were deficient. These data show that PGC-1α is essential for brown fat thermogenesis but not brown fat differentiation, and the PGC-1 coactivators play an absolutely essential but complementary function in differentiation-induced mitochondrial biogenesis. Affymetrix microarray analysis of total RNA from wt, PGC-1α KO and PGC-1α KO
cells expressing an RNAi specific for PGC-1β knockdown was performed. Of the 461
mitochondrial genes analyzed, 181 were found to be at least 20% different between wt
and defective PGC-1α and β adipocytes (p < 0.05). More than 85% of these genes were downregulated in cells deficient for PGC-1alpha and PGC-1beta.
Keywords: Analysis of mitochondrial gene expression
Overall design: Brown preadipocytes that were either WT, KO for PGC-1alpha, or KO for PGC-1alpha and deficient for PGC-1beta (knockdown through siRNA expression) were differentiated for seven days. RNA was made from biological replicates of the three different types of brown adipocytes (WT, KO expressing a control siRNA, KO expressing a siRNA specific for PGC-1beta knockdown).
Accession | PRJNA96677; GEO: GSE5042 |
Data Type | Transcriptome or Gene expression |
Scope | Multiisolate |
Organism | Mus musculus[Taxonomy ID: 10090] Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Mammalia; Eutheria; Euarchontoglires; Glires; Rodentia; Myomorpha; Muroidea; Muridae; Murinae; Mus; Mus; Mus musculus |
Publications | Uldry M et al., "Complementary action of the PGC-1 coactivators in mitochondrial biogenesis and brown fat differentiation.", Cell Metab, 2006 May;3(5):333-41 |
Submission | Registration date: 9-Jun-2006 Dana Farber Cancer Institute |
Relevance | Model Organism |
Project Data:
Resource Name | Number of Links |
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Publications |
PubMed | 1 |
Other datasets |
GEO DataSets | 2 |
GEO Data DetailsParameter | Value |
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Data volume, Spots | 270222 |
Data volume, Processed Mbytes | 5 |