Abstract:
:Background Ischemic heart disease continues to be a leading cause of mortality in patients. Extracellular vesicles (EVs) provide a potential for treatment that may induce collateral vessel growth to increase myocardial perfusion. Methods and Results Nineteen male Yorkshire pigs were given a high-fat diet for 4 weeks, then underwent placement of an ameroid constrictor on the left circumflex artery to induce chronic myocardial ischemia. Two weeks later, the pigs received either intramyocardial vehicle (n=6), EVs (high-fat diet with myocardial EV injection [HVM]; n=8), or HVM and calpain inhibition (n=5). Five weeks later, myocardial function, perfusion, coronary vascular density, and cell signaling were examined. Perfusion in the collateral-dependent myocardium was increased during rapid ventricular pacing in the HVM group in both nonischemic (P=0.04) and ischemic areas of the ventricle (P=0.05). Cardiac output and stroke volume were significantly improved in the HVM group compared with the control group during ventricular pacing (P=0.006). Increased arteriolar density was seen in the HVM group in both nonischemic and ischemic myocardium (P=0.003 for both). However, no significant changes in the capillary density were observed between the control, HVM, and HVM and calpain inhibition groups (P=0.07). The group that received EVs with oral calpain inhibition had neither increased vessel density (P>0.99) nor improvement in blood flow or cardiac function (P=0.48) when compared with the control group. Conclusions These findings suggest that EVs promote angiogenesis in areas of chronic myocardial ischemia and improve cardiac function under conditions of diet-induced metabolic syndrome.
journal_name
J Am Heart Assocjournal_title
Journal of the American Heart Associationauthors
Scrimgeour LA,Potz BA,Aboul Gheit A,Shi G,Stanley M,Zhang Z,Sodha NR,Ahsan N,Abid MR,Sellke FWdoi
10.1161/JAHA.119.012617subject
Has Abstractpub_date
2019-08-06 00:00:00pages
e012617issue
15issn
2047-9980journal_volume
8pub_type
杂志文章abstract::Background Hyperhomocysteinemia is a risk factor for ischemic stroke; however, a targeted treatment strategy is lacking partly because of limited understanding of the causal role of homocysteine in cerebrovascular pathogenesis. Methods and Results In a genetic model of cystathionine beta synthase (CBS) deficiency, we ...
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更新日期:2016-11-23 00:00:00
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pub_type: 杂志文章,多中心研究,随机对照试验
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更新日期:2016-04-18 00:00:00
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doi:10.1161/JAHA.118.010224
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journal_title:Journal of the American Heart Association
pub_type: 杂志文章,多中心研究,随机对照试验
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pub_type: 杂志文章
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更新日期:2020-07-21 00:00:00
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journal_title:Journal of the American Heart Association
pub_type: 杂志文章
doi:10.1161/JAHA.114.000998
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更新日期:2019-07-16 00:00:00
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更新日期:2015-12-01 00:00:00
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更新日期:2019-02-19 00:00:00
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更新日期:2017-08-30 00:00:00
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pub_type: 杂志文章,多中心研究
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更新日期:2019-01-08 00:00:00
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