Abstract:
OBJECTIVES:5-Hydroxytryptamine (5-HT) has a wide range of vascular effects mediated via specific receptors and it has been suggested to be a mediator in ischemic heart disease. The aim of the present study was to localise the 5-HT receptors within the vessel wall. METHODS:Epicardial coronary arteries obtained from patients undergoing cardiac transplantation, internal mammary arteries from heart donors and saphenous veins from patients undergoing coronary bypass surgery, were sectioned and incubated with [3H]-5-HT for in vitro receptor autoradiography. RESULTS:Microscopic analysis of high resolution autoradiographic images revealed a similar pattern of [3H]-5-HT binding in epicardial coronary and internal mammary artery, where it predominated in the lamina muscularis. In the saphenous vein, binding increased towards the adventitia which showed dense, displaceable binding to the vasa vasorum as well as to nerve-like structures, from which binding was only partially displaced. Computer-assisted densitometric analysis of low resolution autoradiographs revealed a high degree of specific binding to all vessels examined. CONCLUSIONS:The distribution of the [3H]-5-HT binding is different in the saphenous vein compared to epicardial coronary and internal mammary artery. The dense binding to vasa vasorum in the saphenous vein suggests a role for 5-HT in closure of these nutrient vessels, which could contribute to the formation of atherosclerotic changes in saphenous vein grafts.
journal_name
Cardiovasc Resjournal_title
Cardiovascular researchauthors
Dahm PL,Bodelsson M,Törnebrandt K,Muddle JR,Sykes RM,Yacoub M,Dashwood MRdoi
10.1016/0008-6363(96)00029-6subject
Has Abstractpub_date
1996-05-01 00:00:00pages
800-6issue
5eissn
0008-6363issn
1755-3245pii
0008-6363(96)00029-6journal_volume
31pub_type
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journal_title:Cardiovascular research
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journal_title:Cardiovascular research
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doi:10.1093/cvr/20.4.294
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journal_title:Cardiovascular research
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journal_title:Cardiovascular research
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更新日期:1993-09-01 00:00:00
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pub_type: 杂志文章
doi:10.1016/j.cardiores.2004.07.023
更新日期:2004-12-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章,评审
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更新日期:1996-12-01 00:00:00
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更新日期:1997-09-01 00:00:00
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journal_title:Cardiovascular research
pub_type: 杂志文章
doi:10.1093/cvr/cvaa239
更新日期:2020-08-10 00:00:00
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pub_type: 杂志文章
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更新日期:2014-10-01 00:00:00