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The effect on ephedrine prodrugs on locomotor activity in rats.
1. Five oxazolidines were synthesized by reaction of (-) ephedrine with formaldehyde, propionaldehyde, butyraldehyde, isobutyraldehyde, and acetone, respectively. 2. Half-lives of hydrolysis were measured in pH 7.4 aqueous buffer. Half-lives varied from 12 seconds to 11 minutes. 3. The compounds wer...
Activation of liver X receptor enhances the proliferation and migration of endothelial progenitor cells and promotes vascular repair through...
We demonstrate that LXRs, including LXRα and LXRβ, are expressed and functional in rat bone marrow-derived EPCs. Treatment with an LXR agonist, TO901317 (TO) or GW3965 (GW), significantly increased the proliferation and migration of EPCs, as well as Akt and eNOS phosphorylation in EPCs. Moreover, LX...
Cardiovascular effects of acute treatment with the antipsychotic drug olanzapine in rats.
We investigated if the atypical antipsychotic olanzapine alters in vivo cardiovascular function in rats. Male Sprague-Dawley rats were prepared with indwelling catheters. After 4 h of recovery from surgery, the mean arterial pressure (MAP), mean circulatory filling pressure (MCFP; index of body veno...
Low anticoagulant heparin blocks thrombin-induced endothelial permeability in a PAR-dependent manner.
We studied the effects of heparin and low anticoagulant 2-O, 3-O desulfated heparin (ODSH) on thrombin-induced increases in paracellular permeability of cultured human pulmonary endothelial cells (ECs). Pretreatment with heparin or ODSH blocked thrombin-induced decrease in the EC transendothelial el...
Nicotinic acetylcholine receptor mediates nicotine-induced actin cytoskeletal remodeling and extracellular matrix degradation by vascular sm...
We found that cigarette smoke extract, nicotine, and the cholinergic agonist, carbachol, were similarly effective in inducing the formation of podosome rosettes in A7r5 VSMCs. α-Bungarotoxin and atropine experiments confirmed the involvement of nicotinic acetylcholine receptors (nAChRs). Western blo...
Gleditsioside B, a triterpene saponin isolated from the anomalous fruits of Gleditsia sinensis Lam., abrogates bFGF-induced endothelial cell...
We assessed the effect of GB on endothelial cell migration, a crucial event in angiogenesis, and explored the underlying mechanisms. The migration of endothelial cells was assessed by transwell. The expressions of MMP-2/-9 and TIMP-1/-2 were analyzed by Western blotting, and the activities of MMP-2/...
Crosstalk between macrophages and smooth muscle cells in atherosclerotic vascular diseases.
Macrophages and smooth muscle cells (SMCs) represent major players in the pathogenesis of atherosclerotic vascular diseases. SMCs often reside in close proximity to macrophage clusters. Activated macrophages may promote pro-atherogenic functions of SMCs. Addressing macrophage-dependent mechanisms of...
Fenofibrate attenuates nicotine-induced vascular endothelial dysfunction in the rat.
The study has been designed to investigate the effect of fenofibrate on nicotine-induced vascular endothelial dysfunction (VED) in rats. Nicotine (2 mg/kg/day, i.p., 4 weeks) was administered to produce VED in rats. The development of VED was assessed by employing isolated aortic ring preparation an...
The annexin A2 system and vascular homeostasis.
Optimal fibrin balance requires precisely controlled plasmin generation on the surface of endothelial cells, which line the blood vessel wall. As a co-receptor for plasminogen and tissue plasminogen activator (tPA), which are key factors in plasmin generation, the annexin A2 (A2) complex promotes va...
Anti-angiogenic activity of triptolide in anaplastic thyroid carcinoma is mediated by targeting vascular endothelial and tumor cells
We further expound the precise mechanism involved in this activity. Triptolide downregulated nuclear factor kappa B (NF-κB) pathway and its targeting genes associated with endothelial cell mobilization in human umbilical vein endothelial cells (HUVECs) and impaired VEGF expression in thyroid carcino...