Abstract:
:Although the vasorelaxing effects of testosterone (T) and various androgen metabolites have been observed in a variety of blood vessels and species, previous studies have not systematically compared the vasorelaxing effects of androgen metabolites in different vascular beds within the same species. Therefore, we studied the vasorelaxing effects of T and its 5-reduced metabolites (5α- and 5β-DHT) on KCl-induced contractions of the canine left coronary artery, femoral artery and saphenous vein, using standard isometric recordings. KCl contractions were inhibited by each androgen in a concentration-dependent manner from 1.8 to 310μM. Vascular sensitivity and efficacy were expressed as inhibitory concentration 50 (IC₅₀) and maximal relaxation (R(max)), respectively. The coronary artery was significantly more sensitive to androgen-induced vasorelaxation than the saphenous vein or femoral artery. These vasorelaxing responses were unaffected by an antiandrogen (Flutamide) or the sulfhydryl reagent, N-ethylmaleimide, suggesting a nongenomic mechanism independent of signaling mediated by the androgen receptor or G proteins. Concentration-response curves were unchanged in endothelium-denuded preparations; thus, the endothelium appears to have no role in androgen-induced vasorelaxation. 5β-DHT was the most potent androgen in both coronary and femoral artery, but all three androgens were equipotent in the saphenous vein. It is concluded that: 1) significant regional differences exist in vasorelaxing effects of androgen metabolites in the canine vasculature; 2) structural differences in these androgens determine their vasorelaxing efficacy; and 3) regional differences in androgen-induced vasorelaxation may account for some of the conflicting findings reported on the vasorelaxing effects of the androgens.
journal_name
Vascul Pharmacoljournal_title
Vascular pharmacologyauthors
Perusquía M,Espinoza J,Montaño LM,Stallone JNdoi
10.1016/j.vph.2012.01.008subject
Has Abstractpub_date
2012-03-01 00:00:00pages
176-82issue
3-4eissn
1537-1891issn
1879-3649pii
S1537-1891(12)00032-8journal_volume
56pub_type
杂志文章abstract:BACKGROUND:Tissue Factor (TF) plays a pivotal role in coronary thrombosis. Oxidized low-density lipoproteins (oxLDL) are crucial in development of atherosclerosclerosis. Moreover, oxLDL are known to induce TF expression on several cell types including endothelial cells. The lectin-type oxidized LDL receptor 1 (LOX-1) r...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2020.106822
更新日期:2020-11-21 00:00:00
abstract::Lactadherin is a small (53-66kDa) multifunctional glycoprotein belonging to the secreted extracellular matrix protein family. It has a multi-domain structure and is involved in many biological and physiological processes, including phagocytosis, angiogenesis, atherosclerosis, tissue remodeling, and haemostasis regulat...
journal_title:Vascular pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.vph.2017.11.006
更新日期:2018-02-01 00:00:00
abstract:OBJECTIVE:Inflammation and oxidative stress play a key role in the initiation, propagation, and development of atherosclerosis. Arterial baroreflex (ABR) dysfunction induced by sinoaortic denervation (SAD) promoted the development of atherosclerosis in ApoE-/- mice. The present work was designed to examine whether ABR ...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2016.08.008
更新日期:2016-12-01 00:00:00
abstract::Much has been written about the potential of pharmacogenetic testing to inform therapy based on an individual's genetic makeup, and to decide the most effective choice of available drugs, or to avoid dangerous side effects. Currently, there is little hard data for either in the field of cardiovascular disease. The usu...
journal_title:Vascular pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.vph.2005.10.003
更新日期:2006-02-01 00:00:00
abstract::The sulfur-containing amino acid, taurine, has been shown to ameliorate the vascular disorders. We examined the effects of taurine ingestion on intimal thickening following balloon injury. Balloon injury was induced in the left common carotid artery of Wistar rats. Taurine (3% (w/v)) was mixed in the drinking water fr...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2010.07.003
更新日期:2010-09-01 00:00:00
abstract:BACKGROUND:Antitumor activity of paclitaxel is based on promotion of abnormal microtubule (MT) assembly but it is also considered to have significant pro-inflammatory and anti-angiogenic effects in vivo and thus may cause vascular dysfunction. METHODS:We studied 27 women treated with paclitaxel-containing combinations...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2010.05.002
更新日期:2010-09-01 00:00:00
abstract::Metformin (Met) can improve atherosclerosis (As). Abnormal endothelin receptors [including endothelin type A (ETA) or type B (ETB) receptor] in vascular smooth muscle cells (VSMCs) are involved in As. Hyperhomocysteinemia (HHcy) is an independent risk factor for As. The present study was designed to test our hypothesi...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2019.106613
更新日期:2020-01-01 00:00:00
abstract::AMP-activated protein kinase (AMPK) is present in the arterial wall and is activated in response to cellular stressors that raise AMP relative to ADP/ATP. Activation of AMPK in vivo lowers blood pressure but the influence of hyperlipidemia on this response has not been studied. ApoE(-/-) mice on high fat diet for 6wee...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2015.07.010
更新日期:2015-11-01 00:00:00
abstract::Hyperhomocysteinemia (HHcy) is a metabolic disorder marked by an excess amount of the amino acid homocysteine (Hcy) in the blood stream. Hcy is a H(2)S precursor-formed from the metabolism of methionine. Elevated Hcy levels have been associated with higher blood pressure. However, the precise contribution of H(2)S to ...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2010.05.004
更新日期:2010-09-01 00:00:00
abstract::The implications of altered coagulation-fibrinolytic system in the pathophysiology of several vascular disorders, such as stroke and myocardial infarction, have been well researched upon and established. However, its role in the progression of diabetic retinopathy has not been explored much. Since a decade, it is know...
journal_title:Vascular pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.vph.2017.03.005
更新日期:2017-05-01 00:00:00
abstract::A large number of studies utilize animal models to investigate therapeutic angiogenesis. However, the lack of a standardized experimental model leaves the comparison of different studies problematic. To establish a reference model of prolonged moderate tissue ischemia, we created unilateral hind limb ischemia in athym...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2009.07.001
更新日期:2009-10-01 00:00:00
abstract::There is evidence that dihydropyridine calcium antagonists (DHP) play a beneficial role during the development of atherosclerosis. Since antioxidative properties of this substance class may be important, we investigated the antioxidative potency of the DHP prototype calcium channel antagonist nifedipine, the long acti...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2004.11.003
更新日期:2005-03-01 00:00:00
abstract::To investigate mechanisms of protective effects of fenofibrate on the diabetic kidney, male Wistar rats were divided into control, untreated diabetes, and fenofibrate-treated (32 mg kg(-1) d(-1), 8 weeks) diabetes groups. Diabetes induced by streptozotocin (25 mg/kg) and a high-fat diet was characterized by the disord...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2006.01.004
更新日期:2006-05-01 00:00:00
abstract::The present study was undertaken to investigate endothelial function and epoxyeicosatrienoic acids (EETs), which is a cytochrome P-450 monooxygenase (CYP) metabolite and one of the candidates as an endothelium-derived hyperpolarizing factor (EDHF) in the renal artery isolated from short-term hypercholesterolemic rabbi...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2005.03.005
更新日期:2005-06-01 00:00:00
abstract::The A3 adenosine receptor (A3AR) is attributed with multiple beneficial actions in ischemic-reperfused myocardium, including modulation of oncotic and apoptotic cell death and enhancement of contractile function. Additionally, the A3AR may attenuate vascular dysfunction and improve long-term outcome from myocardial in...
journal_title:Vascular pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.vph.2005.02.009
更新日期:2005-04-01 00:00:00
abstract::MicroRNAs (miRNAs) have emerged as crucial players regulating the magnitude of gene expression in a variety of organisms. This class of short (22 nucleotides) noncoding RNA molecules have been shown to participate in almost every cellular process investigated so far, and their deregulation is observed in different hum...
journal_title:Vascular pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.vph.2011.07.004
更新日期:2011-10-01 00:00:00
abstract::Chemerin is an adipokine associated with increased blood pressure, and may link obesity with hypertension. We tested the hypothesis that chemerin-induced contraction of the vasculature occurs via calcium flux in smooth muscle cells. Isometric contraction of rat aortic rings was performed in parallel with calcium kinet...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2016.11.009
更新日期:2017-01-01 00:00:00
abstract:OBJECTIVE:In patients with familial combined hyperlipidemia (FCHL), without metabolic syndrome (MS), occurrence of non-alcoholic fatty liver disease (NAFLD) is related to a specific pro-inflammatory profile, influenced by genetic traits, involved in oxidative stress and adipokine secretion. Among FCHL or MS patients, h...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2015.04.004
更新日期:2015-09-01 00:00:00
abstract::We characterized vascular reactivity to endothelin-1 (ET-1) in mesenteric vessels from DOCA-salt hypertensive and SHAM control mice and assessed the effect that endothelial-derived vasodilators have on ET-1-induced vasoconstriction. Changes in the diameter of unpressurized small mesenteric arteries and veins (100- to ...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2005.02.014
更新日期:2005-06-01 00:00:00
abstract::Doxorubicin (DXR) is a widely used cytostatic agent, but its administration is limited by its cardiovascular side effects. The endothelium is one of the largest organs in the human body and due to its direct contact with blood; it is exposed to the toxic effects of DXR. The aim of this study was to investigate in endo...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2010.08.001
更新日期:2010-11-01 00:00:00
abstract::Sixty-seven male patients with hypercholesterolemia, divided into three groups according to apolipoprotein E phenotype (33 with apoE3/ 3 phenotype, E3 group; 23 with 2/2 or 2/3, E2+ group; 11 with 4/4 or 4/3, E4+ group), received daily 20-40 mg of fluvastatin for 12 weeks. The levels of triglyceride (TG), cholesterol ...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2003.09.002
更新日期:2003-12-01 00:00:00
abstract::The aim of the present study was to investigate the cardioprotective activity of sulindac as an aldose reductase inhibitor in the development of cardiomyopathy by non-invasive techniques; M-mode and Doppler echocardiography. Diabetes was induced by streptozotocin (45 mg/kg, iv) in the Sprague-Dawley rats. Echocardiogr...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2005.02.012
更新日期:2005-08-01 00:00:00
abstract::Angiogenesis has become an attractive target for the treatment of certain diseases such as cancer and rheumatoid arthritis. Our previous studies demonstrated that the saponin fraction from Gleditsia sinensis fruits had anti-angiogenic potential, and Gleditsiosides B (GB) was probably the main active constituent. In th...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2012.09.006
更新日期:2013-01-01 00:00:00
abstract::Stem cells possess the ability of self-renewal and give rise to specific cell types. The differentiation of stem cells involves environmental factors, transduction of extra and intra-cellular signals, regulation of gene expression by transcriptional factors, microRNAs and chromosome structural modifiers. Vascular SMCs...
journal_title:Vascular pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.vph.2012.02.014
更新日期:2012-05-01 00:00:00
abstract::The purpose of the present study was to investigate whether SNF472, the hexasodium salt of myo-inositol hexaphosphate (IP6 or phytate): 1. Inhibits induced calcification in cultured aortic valve interstitial cells (VIC) as an in vitro model of aortic valve stenosis and 2. Whether inhibition is different in VIC obtaine...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2019.106583
更新日期:2019-01-01 00:00:00
abstract::Endothelial cell dysfunction may play an important role in the development of various vascular diseases, including atherosclerosis. Here we investigated whether lithium chloride (LiCl), an inhibitor of glycogen synthase kinase-3β (GSK-3β), could counteract atherosclerosis induced by a high-fat diet in ApoE⁻/⁻ mice. Te...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2010.09.004
更新日期:2010-11-01 00:00:00
abstract:BACKGROUND:Macrophages play a central role in atherosclerosis development and progression, hence, targeting macrophage activity is considered an attractive therapeutic. Recently, we documented nanomedicinal delivery of the anti-inflammatory compound prednisolone to atherosclerotic plaque macrophages in patients, which ...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2016.04.006
更新日期:2016-07-01 00:00:00
abstract::An endothelial dysfunction generates a proatherogenic environment characterized by stimulating thrombus formation. Epidemiological studies have provided evidence of a protective role of healthy diets in the prevention of cardiovascular diseases. Hydroxycinnamic acids constitute abundant polyphenols in our diets as the...
journal_title:Vascular pharmacology
pub_type: 杂志文章,评审
doi:10.1016/j.vph.2014.10.006
更新日期:2014-12-01 00:00:00
abstract::Urokinase plasminogen activator (uPA) system is important for several biological processes that call for extracellular proteolysis, fibrinolysis, cell migration, proliferation and angiogenesis. The current study highlights the fibrinolytic and wound healing potential of emodin, an anthraquinone, with relevance to the ...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2008.02.002
更新日期:2008-04-01 00:00:00
abstract::We studied the mechanisms involved in the relaxation induced by nitric oxide (NO) donors, ruthenium complex ([Ru(terpy)(bdq)NO(+)](3+)-TERPY) and sodium nitroprusside (SNP) in denuded rat aorta. Both NO donors induced vascular relaxation independent of the agonist used in the pre-contraction. [Ru(terpy)(bdq)NO(+)](3+)...
journal_title:Vascular pharmacology
pub_type: 杂志文章
doi:10.1016/j.vph.2006.10.002
更新日期:2007-03-01 00:00:00