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Series GSE33319 Query DataSets for GSE33319
Status Public on Jun 18, 2012
Title Altered de novo lipogenesis contributes to low adipose stores in cystic fibrosis mice.
Organism Mus musculus
Experiment type Expression profiling by array
Summary Cystic fibrosis (CF) mouse models exhibit exocrine pancreatic function yet do not develop adipose stores to the levels of non-CF mice. CF mice homozygous for the Cftr mutation (F508del) at 3 weeks (post-weaning) and 6 weeks (young adult) of age had markedly less adipose tissue than non-CF mice. Both 3- and 6-week old mice had dietary lipid absorption and fecal lipid excretion comparable to non-CF controls. Fractional hepatic de novo synthesis of palmitate and stearate (de novo lipogenesis, DNL) as determined by deuterium incorporation was reduced in CF mice. At 3 weeks of age, F508del mice had significantly decreased DNL of palmitate and stearate, by 83% and 80%, respectively. By 6 weeks of age, DNL rates in non-CF mice remained unchanged as compared to 3-week old mice, while DNL rates of F508del mice were still reduced, by 33% and 40%, respectively. Adipose tissue fatty acid profiles were comparable in CF and non-CF mice, indicating that adipose differences are quantitative, not qualitative. A correspondingly lower content of deuterium-labeled fatty acids was found in CF adipose tissue, consistent with reduced deposition of newly made hepatic triglycerides and/or decreased adipose tissue lipogenesis. Hepatic transcriptome analysis revealed lower mRNA expression from several genes involved in fatty acid biosynthesis, suggesting down-regulation of several enzymes in fatty acids synthesis as a mechanism for the reduced lipogenesis. These novel data provide a model for altered fat and fatty acid metabolism in CF, independent of malabsorption, and may partly explain the inability of pancreatic enzyme replacement therapy to completely restore normal body mass to CF patients
Overall design ∆F508 CF mice and its WT littermates (3-weeks old females, C57BL/6J) were examined. RNA extracted from snapped-frozen livers, 4 replicates per genotype.
Contributor(s) Perez A, Drumm ML
Citation(s) 22679004
Submission date Oct 28, 2011
Last update date Jun 14, 2018
Contact name Aura Perez
Phone 216-368-6894
Organization name CWRU
Department Pediatrics
Street address 10900 Euclid Avenue
City Cleveland
State/province OH
ZIP/Postal code 44106-4948
Country USA
Platforms (1)
GPL6885 Illumina MouseRef-8 v2.0 expression beadchip
Samples (8)
GSM823870 Liver_Female_WT_rep1
GSM823871 Liver_Female_WT_rep2
GSM823872 Liver_Female_WT_rep3
BioProject PRJNA149291

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Supplementary file Size Download File type/resource
GSE33319_RAW.tar 3.1 Mb (http)(custom) TAR
GSE33319_non-normalized.txt.gz 2.5 Mb (ftp)(http) TXT
Raw data are available on Series record
Processed data included within Sample table

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