Linked Life Data

17485339

Source:http://linkedlifedata.com/resource/pubmed/id/17485339

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PredicateObject
rdf:type
lifeskim:mentions
pubmed:dateCreated
2007-5-8
pubmed:abstractText
Stearoyl-CoA desaturases (SCDs) catalyze the biosynthesis of monounsaturated fatty acids from saturated fatty acids. Four scd genes have been identified in mice and three in human (including one pseudogene). Among the four mouse SCD isoforms, SCD1 is predominantly expressed in liver and adipose tissue. Mice null for the scd1 gene have reduced adiposity, increased energy expenditure and altered lipid profiles. To further evaluate the specific role of hepatic SCD1 and the potential to achieve similar desirable phenotypic changes in adult obese mice, adenovirus-mediated short hairpin interfering RNA (shRNA) was used to acutely knock down hepatic scd1 expression in ob/ob mice. Robust reductions in hepatic SCD1 mRNA and SCD1 enzymatic activity were achieved, sustained up to 2 weeks. Reduced hepatic content of neutral lipids and robust lowering of lipid desaturation indexes, but increased content of liver phosphotidylcholine were observed with SCD1 knockdown. Increased total plasma cholesterol levels were also observed. No significant changes in body weight were observed. Expression levels of several lipogenic and lipid oxidation genes were not significantly altered by short term SCD1 reduction, but UCP2 expression was increased. Our results demonstrate that significant changes to both hepatic and systemic lipid profiles can be achieved through specific knockdown of liver-expressed SCD1 in the ob/ob mouse model. However, hepatic SCD1 knockdown does not result in significant changes in body weight in the short term.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1093-4715
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
12
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3781-94
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
2007
pubmed:articleTitle
Hepatic knockdown of stearoyl-CoA desaturase 1 via RNA interference in obese mice decreases lipid content and changes fatty acid composition.
pubmed:affiliation
Metabolic Disease Research, Abbott Laboratories, Abbott Park, Illinois 60064, USA. hxu@lifespan.org
pubmed:publicationType
Journal Article