Document Detail


Anti-inflammatory Effect of B-Type Natriuretic Peptide Postconditioning During Myocardial Ischemia-Reperfusion: Involvement of PI3K/Akt Signaling Pathway.
MedLine Citation:
PMID:  24771072     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
High mobility group box 1 protein (HMGB1) plays an important role in myocardial ischemia-reperfusion (I/R) injury. B-type natriuretic peptide (BNP) postconditioning has been reported to reduce myocardial I/R injury. The present study investigated whether postconditioning of BNP could reduce myocardial I/R injury by inhibiting HMGB1 expression and the potential mechanisms in rats. The left anterior descending coronary arteries of rats were occluded to induce ischemia for 30 min and reopened to imitate reperfusion for 4 h. The rats were treated with BNP (0.03 μg/kg min, i.v.) 15 min before reperfusion until the end of the procedure, with or without treatment of LY294002 (an inhibitor of phosphoinositide 3-kinase (PI3K), 0.3 mg/kg, i.v.), which was injected 20 min before reperfusion. Lactate dehydrogenase (LDH), creatine kinase (CK), tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6), and infarct size were measured. Phospho-Akt, total Akt, and HMGB1 expression were assessed by immunoblotting. The results showed that treatment of BNP postconditioning could significantly decrease the infarct size and the levels of LDH and CK after 4-h reperfusion (all p < 0.05). BNP postconditioning could also significantly inhibit the increases of TNF-α and IL-6 (both p < 0.05). In addition, BNP postconditioning could significantly inhibit HMGB1 expression induced by I/R (p < 0.05). Administration of LY294002 abolished the effects of BNP postconditioning on myocardial I/R injury and the expressions of phospho-Akt and HMGB1 (all p < 0.05). The present study suggests that postconditioning of BNP could protect against myocardial I/R injury which may be associated with inhibiting HMGB1 expression, while PI3K/Akt signaling pathway may be involved in the expression of HMGB1 and the protective effect of BNP postconditioning.
Authors:
Gangying Hu; Xingyue Huang; Kai Zhang; Hong Jiang; Xiaorong Hu
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-4-27
Journal Detail:
Title:  Inflammation     Volume:  -     ISSN:  1573-2576     ISO Abbreviation:  Inflammation     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-4-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7600105     Medline TA:  Inflammation     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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