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- Publisher Website: 10.1097/FJC.0b013e31820014f9
- Scopus: eid_2-s2.0-78951481202
- PMID: 20980918
- WOS: WOS:000286178000014
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Article: Intracerebroventricular leptin administration differentially alters cardiac energy metabolism in mice fed a low-fat and high-fat diet
Title | Intracerebroventricular leptin administration differentially alters cardiac energy metabolism in mice fed a low-fat and high-fat diet |
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Authors | |
Keywords | fatty acid oxidation glucose oxidation Leptin malonyl CoA pyruvate dehydrogenase |
Issue Date | 2011 |
Citation | Journal of Cardiovascular Pharmacology, 2011, v. 57 n. 1, p. 103-113 How to Cite? |
Abstract | Leptin directly acts on peripheral tissues and alters energy metabolism in obese mice. It also has acute beneficial effects on these tissues via its hypothalamic action. However, it is not clear what effect chronic intracerebroventrical (ICV) leptin administration has on cardiac energy metabolism. We examined the effects of chronic ICV leptin on glucose and fatty acid metabolism in isolated working hearts from high-fat-fed and low-fat-fed mice. Mice were fed a high-fat (60% calories from fat) or low-fat (10% calories from fat) diet for 8 weeks before ICV leptin (5 μg/d) for 7 days. In low-fat-fed mice, leptin increased glucose oxidation rates in isolated working hearts when compared with control [203 ± 21 vs. 793 ± 93 nmol•(g dry weight)•min]. In high-fat-fed mice leptin inhibited fatty acid oxidation [476 ± 73 vs. 251 ± 38 nmol•(g•dry• wt)•min]. The increase in glucose oxidation in low-fat-fed mice was accompanied by increased pyruvate dehydrogenase activity. In high-fat-fed mice, leptin increased cardiac malonyl coenzyme A levels, secondary to a decrease in malonyl coenzyme A decarboxylase expression. These results suggest that ICV leptin alters cardiac energy metabolism opposite to its peripheral effects and that these effects differ depending on energy substrate supply to the mice. Copyright © 2011 by Lippincott Williams & Wilkins. |
Persistent Identifier | http://hdl.handle.net/10722/195859 |
ISSN | 2023 Impact Factor: 2.6 2023 SCImago Journal Rankings: 0.610 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Keung, W | - |
dc.contributor.author | Cadete, VJJ | - |
dc.contributor.author | Palaniyappan, A | - |
dc.contributor.author | Jablonski, A | - |
dc.contributor.author | Fischer, M | - |
dc.contributor.author | Lopaschuk, GD | - |
dc.date.accessioned | 2014-03-19T01:46:10Z | - |
dc.date.available | 2014-03-19T01:46:10Z | - |
dc.date.issued | 2011 | - |
dc.identifier.citation | Journal of Cardiovascular Pharmacology, 2011, v. 57 n. 1, p. 103-113 | - |
dc.identifier.issn | 0160-2446 | - |
dc.identifier.uri | http://hdl.handle.net/10722/195859 | - |
dc.description.abstract | Leptin directly acts on peripheral tissues and alters energy metabolism in obese mice. It also has acute beneficial effects on these tissues via its hypothalamic action. However, it is not clear what effect chronic intracerebroventrical (ICV) leptin administration has on cardiac energy metabolism. We examined the effects of chronic ICV leptin on glucose and fatty acid metabolism in isolated working hearts from high-fat-fed and low-fat-fed mice. Mice were fed a high-fat (60% calories from fat) or low-fat (10% calories from fat) diet for 8 weeks before ICV leptin (5 μg/d) for 7 days. In low-fat-fed mice, leptin increased glucose oxidation rates in isolated working hearts when compared with control [203 ± 21 vs. 793 ± 93 nmol•(g dry weight)•min]. In high-fat-fed mice leptin inhibited fatty acid oxidation [476 ± 73 vs. 251 ± 38 nmol•(g•dry• wt)•min]. The increase in glucose oxidation in low-fat-fed mice was accompanied by increased pyruvate dehydrogenase activity. In high-fat-fed mice, leptin increased cardiac malonyl coenzyme A levels, secondary to a decrease in malonyl coenzyme A decarboxylase expression. These results suggest that ICV leptin alters cardiac energy metabolism opposite to its peripheral effects and that these effects differ depending on energy substrate supply to the mice. Copyright © 2011 by Lippincott Williams & Wilkins. | - |
dc.language | eng | - |
dc.relation.ispartof | Journal of Cardiovascular Pharmacology | - |
dc.subject | fatty acid oxidation | - |
dc.subject | glucose oxidation | - |
dc.subject | Leptin | - |
dc.subject | malonyl CoA | - |
dc.subject | pyruvate dehydrogenase | - |
dc.title | Intracerebroventricular leptin administration differentially alters cardiac energy metabolism in mice fed a low-fat and high-fat diet | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1097/FJC.0b013e31820014f9 | - |
dc.identifier.pmid | 20980918 | - |
dc.identifier.scopus | eid_2-s2.0-78951481202 | - |
dc.identifier.hkuros | 239610 | - |
dc.identifier.volume | 57 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 103 | - |
dc.identifier.epage | 113 | - |
dc.identifier.isi | WOS:000286178000014 | - |
dc.identifier.issnl | 0160-2446 | - |