Abstract | BACKGROUND: Induction of haemeoxygenase-1 (HO-1) increases adiponectin secretion by remodeling adipose tissue in obesity. The objective of our study is to explore whether HO-1 induction directly improves endothelial function independent of adiponectin changes in obese rats. METHODS: RESULTS:
Acetylcholine-induced EDV was significantly attenuated in the obese rats, compared with the NC group (p < 0.05). Pre-incubation of vessels from obese rats with CoPP significantly increased EDV (p < 0.05). However, this beneficial effect of CoPP was partly attenuated in vitro in the presence of inhibitors of AMPK, PI3K or eNOS. HO-1 induction with CoPP significantly increased the activation of the AMPK-PI3K/Akt-eNOS pathway and NO production in parallel with reduced superoxide anion production and NF-κB p65 expression in obese rats. CONCLUSIONS: HO-1 induction with CoPP directly improved endothelial function in obese rats independent of adiponectin changes. The mechanism of this protective effect is related to increasing NO production by activation of the AMPK-PI3K/Akt-eNOS signaling pathway.
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Authors | Fang Han, Ying Guo, Lili Xu, Ningning Hou, Fei Han, Xiaodong Sun |
Journal | Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology
(Cell Physiol Biochem)
Vol. 36
Issue 4
Pg. 1480-90
( 2015)
ISSN: 1421-9778 [Electronic] Germany |
PMID | 26160485
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Copyright | © 2015 S. Karger AG, Basel. |
Chemical References |
- Protective Agents
- Protoporphyrins
- cobaltiprotoporphyrin
- Nitric Oxide Synthase Type III
- Heme Oxygenase-1
- Phosphatidylinositol 3-Kinases
- Proto-Oncogene Proteins c-akt
- AMP-Activated Protein Kinases
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Topics |
- AMP-Activated Protein Kinases
(metabolism)
- Animals
- Aorta
(drug effects, metabolism, physiopathology)
- Endothelium, Vascular
(drug effects, metabolism, physiopathology)
- Enzyme Activation
(drug effects)
- Heme Oxygenase-1
(metabolism)
- Male
- Nitric Oxide Synthase Type III
(metabolism)
- Obesity
(drug therapy, metabolism, physiopathology)
- Phosphatidylinositol 3-Kinases
(metabolism)
- Protective Agents
(pharmacology)
- Proto-Oncogene Proteins c-akt
(metabolism)
- Protoporphyrins
(pharmacology)
- Rats
- Rats, Wistar
- Signal Transduction
(drug effects)
- Vasodilation
(drug effects)
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